manual nsd70d

TELEPROTECTION EQUIPMENTType NSD 70D

OPERATING INSTRUCTIONS1KHW000371-EN

ABB Power Automation Ltd1KHW000371-ENEdition 2000-07-27

NSD 70D

Utility Communication Systems

ABB Power Automation Ltd 1KHW000371 Language: EN 0 - 1Edition: 2000-07-27

Main Document:

Type Document Classify No. Language

OI Operating Instructions 1KHW000371 ENResponsible Department:NKT2

Derived from:HENF 91 216

Revision:-

File-No.:

Prepared: Date/Signature00-06-06 sig. HPR

Approved: Date/Signature00-07-27 sig. St

File-Information:1KHW000371-EN.doc

The following documents are an integrated part of the Operating Instructions:

Type Document Classify No. Language

PGI Programming Instructions HENF 600544 ENTI Testing Instruction HENF 600545 ENCI Commissioning Instruction HENF 600546 ENDD Dimension Drawing HENF 331211

Revision history:

Edition DateInitial edition 1995-07-28 (HENF 91 216)Revised edition 2000-07-27

Author’s address:

ABB Power Automation LtdUtility Communication SystemsDepartment NKCH-5300 Turgi / Switzerland

Call Center: +41 845 844 844

E-mail: [email protected]: www.abb.ch/chpau

© ABB Power Automation Ltd

NSD 70D

Utility Communication Systems


Copyright 1995 ABB POWER AUTOMATION, CH-5300 Turgi, Switzerland

All rights, including applications for patent and registration of other industrial property rights, are reserved.Without the written authority of ABB POWER AUTOMATION, it is neither permitted to reproduce thisdocument, its appendices or any part thereof either electronically or mechanically (including photocopyingand microfilming), nor divulge its contents or make them accessible to third parties.

Liability

The data contained herein purports solely to describe the product and is not a warranty of performance orcharacteristic. It is with the best interest of our customers in mind that ABB POWER AUTOMATION,constantly strives to improve its products in accordance with advances in technology. This may lead,however, to minor discrepancies between the product supplied and its "Technical Description" or "Instructionsfor Installation and Operation".

This document has been carefully reviewed. Should in spite of this errors or omissions be discovered, thepurchaser is kindly requested to notify ABB POWER AUTOMATION, at his earliest convenience.

Providing nothing to the contrary has been contractually agreed, ABB's "General Conditions of Contract forthe Supply of Plant and Machines" apply in all questions of warranty, liability and claims.

NSD 70D

Utility Communication Systems Contents


PART 1 DESCRIPTION AND PRINCIPLE OF OPERATION 1

1. INTRODUCTION 1

1.1 Using the manual 11.2 Intended use of the NSD 70D 11.3 Requirements to be met by the operator 11.4 Requirements to be met by the service personnel 21.5 Guarantee provisions 2

2. SAFETY INSTRUCTIONS 3

2.1 Presentation of safety information 32.2 Basic principles 32.3 General instructions 42.4 Product-specific instructions 4

3. SUMMARY 7

3.1 Application 93.1.1 Data interface G3HM (PCM interface) 113.1.2 Data interface G3HR (RS-422/V.11 interface) 123.1.3 Data interface G3HS (F.O. interface) 143.2 Principle of operation 153.3 Assemblies and power supply units 173.4 Frontplate signals and controls 19

4. MODULES FITTED IN RACKS AND ALTERNATIVE VERSIONS 19

5. MECHANICAL FEATURES 21

5.1 Modules and assemblies 215.2 External connections 22

6. TECHNICAL DATA 27

6.1 System data 276.2 Electromagnetic compatibility and insulation 286.3 DSP module type G3HP 326.4 Data interface 336.4.1 PCM interface type G3HM 336.4.2 RS-422 interface type G3HR 356.4.3 F.O. interface type G3HS up to 5 km 366.4.4 F.O. interface type G3HS up to 30 km 366.5 Relay interface 1 type G3HC 376.6 Relay interface 2 type G3HD 386.7 Alarm interface type G3HE 406.8 Trip counter type G3HF 416.9 Mechanical data 42

NSD 70D



7. DESCRIPTION OF OPERATION 43

7.1 DSP module G3HP 437.1.1 Hardware 437.1.2 Firmware 457.2 Data Interface 487.2.1 PCM interface G3HM 487.2.2 RS-422 interface G3HR 497.2.3 F.O. interface G3HS 517.3 Relay interface 1 G3HC 527.4 Relay interface 2 G3HD 537.5 Alarm interface G3HE 547.6 Trip counter G3HF 55

PART 2 APPLICATION AND SETTING INSTRUCTIONS 1

8. APPLICATIONS 1

8.1 Permissive tripping schemes 18.2 Direct transfer tripping 18.3 Blocking schemes 28.4 Unblocking 38.5 Applications with two to six commands 38.6 Protection of Teed lines 48.6.1 Normal T-operation 48.6.2 Inverse T-operation 58.7 Addressing 5

9. EQUIPMENT SETTINGS 7

9.1 Command transmission time 79.2 Security and dependability 89.3 Statuses of the command outputs during an alarm 8

10. PROGRAMMING 9

10.1 DSP module type G3HP 910.2 Data interface 1110.2.1 PCM interface type G3HM 1110.2.2 RS-422-interface type G3HR 1110.2.3 F.O. interface type G3HS 1210.3 Relay interface 1 type G3HC 1310.4 Relay interface 2 type G3HD 1410.5 Alarm interface type G3HE 1510.6 Trip counter type G3HF 1610.7 Rack G7BGa 16

NSD 70D



PART 3 INSTALLATION, COMMISSIONING, OPERATION AND MAINTENANCE 1

11. ASSEMBLY AND INSTALLATION 1

11.1 Precautions for avoiding transport damage 111.2 Mechanical Inspection 111.3 Equipment room 211.4 Connecting the cables 2

12. TESTING AND COMMISSIONING 6

12.1 Safety instructions 612.2 Testing facilities 712.3 Pocket terminal 8

13. OPERATION AND MAINTENANCE 9

13.1 Operation 913.1.1 Terminal messages 913.1.2 Alarm messages and their causes 1013.2 Maintenance 1113.2.1 Periodic tests 1113.2.2 Replacing the buffer battery 12

14. STORAGE, DECOMMISSIONING AND DISPOSAL 13

14.1 Safety instructions 1314.2 Storage 1314.3 Decommissioning 1414.4 Disposal 14

NSD 70D



PART 4 APPENDIX 1

A LIST OF ASSEMBLIES AND UNITS 1

B FIRMWARE VERSIONS AND COMPATIBILITY REQUIREMENTS 1

B1 Anomalies: 1

C SYMBOLS AND ABBREVIATIONS 1

D BLOCK DIAGRAMS 1

E DEPENDABILITY AND SECURITY MEASUREMENTS 1

F PROGRAMMING INSTRUCTIONS NSD 70D 1

G TESTING INSTRUCTIONS NSD 70D 1

H COMMISSIONING INSTRUCTIONS NSD 70D 1

I DIMENSION DRAWING RACK G7BGa 1

K EQUIPMENT VIEW 1

NSD 70D

Utility Communication Systems Introduction


PART 1 DESCRIPTION AND PRINCIPLE OF OPERATION

1. INTRODUCTION

1.1 Using the manualThe manual is written for service and operation personnel in the high voltage (HV) power line environment. Allexisting safety instructions in the client's environment have to be observed and only trained and instructedpersonnel has to work with the equipment. The manual gives the needed instructions for the all steps in thelife-cycle of the equipment, e.g. from transport, storage, commissioning to maintenance, decommissioningand disposal. Please refer to the appropriate section for the particular step or function.

The different steps of transport, installation, testing and commissioning are normally made by various people.Safety instructions are therefore included in all the corresponding chapters and may so appear as doubleinformation.In this manual, two types of persons dealing with the equipment are distinguished: Service personnel andoperator.

1.2 Intended use of the NSD 70DThe NSD 70D is a teleprotection equipment used to transmit commands via digital channels. In the event of afault, it makes a decisive contribution to rapidly and selectively isolating the faulty line.

1.3 Requirements to be met by the operator

• The operator must have a general understanding of electronic and electrical systems.• The operator must have a basic knowledge of teleprotection equipment and its principles.• The operator is required to be reasonably careful in dealing with obvious hazards.• The operator is required to understand and respect all warning labels in order to avoid any

personnel injury or equipment damage.• The operator is not allowed to perform any of the manipulations or procedures described in the

following sections:- section 10 “Programming”,- section 11 “Assembly and Installation”,- section 12 “Testing and Commissioning”- section 13.2 “Maintenance”.- section 14 “Storage, Decommissioning and Disposal”

NSD 70D

Utility Communication Systems Introduction


1.4 Requirements to be met by the service personnel

• Service personnel must read and understand the operating instructions before working with theNSD 70D equipment.

• The service personnel must follow the precautions for ESD protection while handling themodules.

• The service personnel must strictly follow all precautions and warnings which could causepersonnel injury or damage to the equipment.

• The NSD 70D equipment is used as a reliable and dependable transmitter of tripping signals. Inadvance to any manipulation on the NSD 70D equipment, the equipment has to be set clear orstandby and the signalling be switched into a safe mode, to protect against unwanted trippingsignals.

• It is highly recommended that the service personnel has attended a training course on theequipment.

1.5 Guarantee provisionsThe manufacturer disclaims any responsibility for hazards and material damage, if the equipment is operatedother than for its intended use as described in this manual or if the equipment is serviced by non qualifiedpersonnel.

NSD 70D

Utility Communication Systems Safety instructions


2. SAFETY INSTRUCTIONS

2.1 Presentation of safety informationThe NSD 70D equipment itself is safe and without any risk. This is not valid for its containment and theperipheral surrounding, like the high voltage area and lines. Only service personnel is therefore allowed toexecute all the steps and manipulations described in this manual. Some of the operations may also becarried out by operators, see section 1.

In this manual the safety instructions are marked as follows:

DANGERInformation or do’s and don’ts to prevent seriouspersonal injury or extensive equipment damage.

Caution Specific information or do’s and don’ts to prevent minordamage and operating problems.

�Note: Specific information with regard to the optimum use of

the appliance.

On the Equipment, safety instructions are marked as follows:

DANGERHazardous voltage.Beware of electric shock.

Caution Specific information to prevent minor damage andoperating problems.

CautionESD

Specific information to prevent equipment damage byelectrostatic discharge.

2.2 Basic principlesThe NSD 70D equipment complies with the latest standards of engineering and the recognised safetyregulations. In spite of this, hazards could arise with inappropriate operation of the equipment.The NSD 70D equipment should only be operated in fault free condition and within the guidelines lay down inthe operating instructions.

NSD 70D



2.3 General instructions

Personnel qualification

DANGERAn authorised and properly trained personnel only isadmitted to carry out programming, commissioning,maintenance, troubleshooting and work of theequipment.

Instruction manual

DANGERThe instruction manual should be read and clearlyunderstood before working on the equipment.

Safety and monitoring facilities

DANGERMechanical safety facilities such as cover platesmust not be removed or by-passed.

Warning labels

DANGERPrecautions and indications to hazardous voltagesmust be strictly observed.

2.4 Product-specific instructions

Technical specifications

DANGERThe equipment must be operated within the technicalspecifications. Failure to do so may result in personalinjuries or equipment damage.

Alteration

DANGERAlteration of the equipment is not allowed.

Inserting and removing of plug-in modules

Caution Neither removing nor inserting of modules is permittedduring power-up of the equipment. Proceeding to plug inand out of modules the power supply of the equipmenthas to be switched OFF.

PCB extender

DANGERThe units G3HC, G3HD and G3HE must not be usedwith PCB extenders!

Hazardous voltage. Beware of electric shock.

NSD 70D



ESD protection

CautionESD

The modules in this equipment contain devices, whichcan be damaged by electrostatic discharges. Appropriatemeasures must be taken before unpacking modules orwithdrawing them from equipment racks. Essentialprecautions to prevent ESD damage when handling orworking on modules are grounding straps for technicalpersonnel and the provision of anti-static workbenches.Modules may only be shipped either in their originalpacking or installed in equipment racks.

Transportation

Caution The plug-in units must be carefully but firmly screwed intothe racks to prevent them from falling out. Separatelypacked modules and other loose parts must be properlysecured and suitably packed to avoid damage. Seesection 11

Mechanical Installation

DANGERThe equipment must be mounted in a cabinet.

DANGERCabinets, which are not secured to the floor, tipforwards when the hinged frame is opened. Do notopen the hinged frame without precautions.

Electrical Installation

DANGERThis is a Class ΙΙΙΙ equipment as specified in IEC 60950.The equipment and the cabinet must be earthed.The equipment must be supplied over a circuitbreaker.

DANGERThe circuit breaker for the power supply of theequipment must be switched OFF.The circuit breakers for optional equipment in thecabinet must be switched OFF.

DANGERThe isolating terminals from the external cables mustbe kept open during installation, maintenance andbefore storage, decommissioning and disposal.

DANGERFaston connectors on the rack must be covered withan isolation sleeve.Unused faston connectors have to be covered.

NSD 70D



Work on the system

DANGERDo not work on the system or connect or disconnectcables during period of lightning activities.

Unused slots

DANGERUnused slots in the equipment subracks must becovered with front plates.

Electrical strength test

DANGERDo not repeat any electrical strength tests. Impropertest methods can cause servere damage to theequipment.Electric strength and earth continuity tests have beenperformed in the factory.

EMC

Caution This is a class A equipment specified in CISPR 22(EN55022). In a domestic environment, thisequipment may cause radio interference. In thiscase, the user may be required to take adequatemeasures.

Power supply for alarm

Caution The alarm power supply must be short current andover current protected.

Laser/LED

CautionLaser/LED

Class 1 Laser/LED Product.

Lithium battery

DANGERDanger of explosion exists if the lithium battery isincorrectly replaced. Replace only with the same orequivalent type recommended by the manufacturer.

DANGERFor replacing and inserting the battery use always apotentially-free soldering iron.

Check the polarity before inserting the battery.

NSD 70D

Utility Communication Systems Summary


3. SUMMARY

Teleprotection equipment serves to transmit commands produced by protective relays and systems in HVelectrical power systems. In the event of a fault, it makes a decisive contribution to rapidly and selectivelyisolating the faulty line.

The most important characteristics of teleprotection equipment are security, dependability and transmissiontime. Interference on the communication lines must neither be able to simulate a tripping signal when there isno fault (security) nor inadmissible delay a genuine tripping signal (dependability). High security and highdependability coupled with short transmission times and a narrow bandwidth are contradictory requirements.

The transmission of tripping signals via pilot wires or the speech channels of power line carrier equipment iswidely used. The limited bandwidth of such analogue channels constrains the speed of transmission and thenumber of tripping signals per protection channel. Since the advent of digital transmission systems, however,more and more high capacity channels are becoming available. For example, it is now standard practice foran analogue speech channel on data transmission equipment to be replaced by an interface for digital datawith a transmission rate of 64 kBit/s or 56 kBit/s. Already optical transmission media are often used toprevent the influence of electromagnetic disturbances. Modern teleprotection equipment must take fulladvantage of the capabilities of digital channels without sacrificing any of the characteristics which areessential for the transmission of tripping signals.

The data transfer rate of the NSD 70D of 64 kBit/s or 56 kBit/s is dictated by the capacity of the data channel.Interference on a data channel results in a higher bit error rate or even loss of synchronism at the receiver. Inthe case of the NSD 70D, the probability of false tripping being caused by transmission errors in thecommunications channel is a function of the signal evaluation time in the receiver. Thus for digital channelsas well, the speed of transmitting tripping signals is limited by the security requirements. The maximumpermissible transmission time depends on the application. For example, permissive transfer trippingprotection schemes require a fast channel with high dependability, but a somewhat reduced security isacceptable. Direct transfer tripping schemes, however, must have the highest possible security anddependability, but have reduced demands on channel speed.

Microprocessor techniques and digital signal processing enable the programmable teleprotection equipmentNSD 70D to be adapted to ideally suit the different operating modes required for tripping signal com-munications equipment.

NSD 70D



NSD 70D features

* Versatile applicationSuitable for blocking schemes and permissive and direct transfer tripping schemes via data channelsconforming to CCITT G.703 or RS-422/V.11 recommendations or via optical data channels.

* ProgrammableProgramming switches are provided for setting one of two optional transmission times and the response ofthe NSD 70D in the event of alarm.

* Up to 6 commands per unitThe NSD 70D is thus able to handle the commands of a phase-by-phase protection scheme for a doublecircuit line.

* High speedTransmission time < 3 ms or < 6 ms at the highest security level.

* Reliable and robustAll interfaces and the power supply unit are DC isolated. Duplicate power supply units can be fitted(redundancy).

* CompactTwo independent units each for 3 commands in one 19"/3U rack or a single unit for up to 6 commands.

* Digital signal processingReliable operation is assured by a communications protocol and powerful signal evaluation algorithms es-pecially developed for protection applications.

* T-operationEconomic schemes for protecting lines with multiple terminals (Teed lines).

* Inverse T-operationEconomic scheme for permissive transfer tripping (overreaching) on Teed lines.

* In-operation testingCyclic and manual testing routines enable the integrity of the communications channel to be tested duringnormal operation. The availability of the equipment is continuously monitored by self-testing procedures.Information on the status and settings of the equipment or alarm signals from the local unit and the unit at theother end of the line can be accessed via a serial interface using a pocket terminal or a PC.

* Modular structureThe equipment is logically divided into a signal processing module, a data interface, a relay interface, analarm module, a DC isolated power supply unit and an optional trip counter.

* Open systemWith two exceptions, the units of the NSD 70D for digital communication are identical to those of the NSD 70for analogue communication. This high degree of compatibility facilitates the modification of existing equip-ment and reduces the number of different modules.

* AddressableAssigning addresses to the devices makes it possible to detect for which station a data signal is intended.

NSD 70D



3.1 ApplicationThe NSD 70D is a digital teleprotection unit capable of transmitting up to 6 tripping signals via a 64 kBit/s or56 kBit/s digital multiplexer channel, which can be equipped with either a contradirectional or a codirectionalinterface conforming to CCITT G.703, with an RS-422/V.11 interface or with an optical interface. For theG.703 interface to operate codirectionally, the multiplexer must operate in a plesiochronous mode, becauseterminal equipment and multiplexer each have their own clock oscillators with "slightly differing" frequencies(discrepancy < ±100 ppm). The slip this causes is compensated by periodically omitting an octet or repeatingone. How often these "pattern slips" occur depends on the difference in the clock frequencies of the terminalequipment (NSD 70D) and the multiplexer. The ability to program the contra and codirectional interfaces andtheir integration in the same module, or using the RS-422/V.11 interface or the optical interface permits theNSD 70D to be easily adapted to the multiplexer's existing interface.

The NSD 70D can be used in blocking schemes, permissive and direct transfer tripping schemes and for thecontinuous transmission of commands in point-to-point or teed feeder systems. In all cases the hardware isthe same.

The equipment is extremely simple to set and to operate, the parameters being set on programmingswitches.

The basic version of the NSD 70D is intended for the transmission of one command. By inserting further relayinterface modules, it can be expanded for up to six independent commands. With the maximum complementof six commands, one NSD 70D is sufficient for the phase-discriminative protection of a double circuit line.The unblocking function, which closes an enabling contact for 200 ms in the event of loss of signal, isstandard equipment on all units. This is of consequence mainly for permissive overreaching transfer trippingschemes.

All interfaces are DC isolated. The transmitter signal is activated by applying a DC signal at station batteryvoltage. The receiver is equipped with main and auxiliary contacts for each command output and a commonalarm contact. A trip counter is optionally available.

T-operation

When the equipment is set for protecting multiple terminal lines, a signal transmitted by one unit is receivedby all the others. A set of terminal equipment for the teed leg comprises two NSD 70D's in the same rack.The signals are looped through the terminal in the T-station such that no time is lost due to additional signalprocessing. In this mode, an NSD 70D can handle a maximum of three commands.

Inverse T-operation

This mode of operation can be used in a permissive transfer tripping (overreaching) scheme.The tripping signals are only looped through the teed station if the local protection relay detects a fault on theline.

External connections and power supply

All connections to the equipment, i.e. incoming and outgoing signals, are made by plug-in connectors whichare wired to isolating terminals (4 mm2). In the case of the data interface RS-422, the signal connections can

NSD 70D



also be made via a SUB-D connector. The optical transmit and receive components are mounted on the frontof the F.O. interface.

The following alternative arrangements are available for a 19" rack:

- 2 independent NSD 70D units for 2 commands each and trip counter- 2 independent NSD 70D units for 3 commands each without trip counter- 1 NSD 70D with up to 4 commands and trip counter- 1 NSD 70D with 6 commands without trip counter

The rack may have a single power supply unit or may have a redundant supply with two units. Power supplyunits are available for station battery voltages of 24 VDC to 250 VDC and AC supplies of 110 VAC to230 VAC. The supply cables are connected to the side of the device by FASTON connectors.

Further details on particular applications are to be found in Section 8.

NSD 70D



3.1.1 Data interface G3HM (PCM interface)The PCM interface type G3HM (PCM = pulse code modulation) can be programmed for contradirectional orcodirectional operation at a data transfer rate of 64 kBit/s.

Contradirectional interface (CCITT G.703)

Contradirectional operation requires 4 pairs of conductors. Two of the pairs are used for transmitting thecombined signal for octet and bit clocks (8 kHz + 64 kHz) from the PCM multiplexer to the PCM interface(G3HM). The other two pairs convey the 64 kBit/s data signals.

Codirectional interface (CCITT G.703)

A codirectional interface only requires two pairs of conductors instead of the four needed by a contradirec-tional scheme. Each pair is used to transfer a combined data and clock signal between the two sets ofterminal equipment. The combined signal comprises a 64 kBit/s information signal, a 64 kHz bit clock and the8 kHz octet clock. The symbol rate of the combined clock/data signal is 256 kBaud.

The signals are coupled into and out of the equipment by isolating transformers such that only the voltagedifference between the cores is processed. Thus the influence of common mode interference on signalevaluation depends on the degree of longitudinal balance.

64-kbit/s data signal Tx

64-kbit/s data signal Rx

comb. clock signal Tx

comb. clock signal Rx

PCM Interface G3HM

Transmitter

Receiver

PCM Multiplexer

BA70DE01.DRW

PCM Interface G3HM

Receiver

Transmitter

comb. data / clock signal Tx

comb. data / clock signal Rx

PCM Multiplexer

BA70DE02.DRW

NSD 70D



3.1.2 Data interface G3HR (RS-422/V.11 interface)The electrical characteristics of this interface conform to the standard EIA RS-422 which is electricallyidentical to the standards V.11 (CCITT), X.27 (CCITT) and Part 3 of DIN 66259. The data transfer rate iseither 64 kBit/s or 56 kBit/s.

The data interface G3HR can be programmed for the following modes of operation. The signal designations(SD, RD, ST, RT, TT) were taken from the EIA-449 recommendation.

Transmit and receive timing provided by the data circuit-terminating equipment:

In this case, the outgoing data signal (SD) is synchronised by the transmit timing signal (ST) and theincoming data signal (RD) is sampled at the rate of the receive timing signal (RT).

Transmit timing provided by the data circuit-terminating equipment:

The interface G3HR only requires the transmit timing signal (ST) from the DCE. The outgoing data (SD) issynchronised to this clock. The internal clock used to sample the incoming signal is synchronised by the datasignal (RD). Provision is also made for synchronising the sampling of the incoming data to the transmit timingsignal (ST). This requires that the ST signal must be connected externally to the RT input and the interfacemust also be correspondingly programmed (see Section 10).

SD (Send Data)

RD (Receive Data)

ST (Send Timing)

RT (Receive Timing)Data Circuit-TerminatingEquipment (DCE)

BA70DE25.DRWRS-422 Interface G3HR

Transmitter

Receiver

SD (Send Data)

RD (Receive Data)

ST (Send Timing)

Data Circuit-TerminatingEquipment (DCE)

BA70DE26.DRW

RS-422 Interface G3HR

Transmitter

Receiver

S1 ON OFF(8) [ x ] [ x ](7) [ x ] [ x ](6) [ x ] [ x ](5) [ x ] [ x ](4)1 [ x ] [ x ](3)2 [ x ] [ x ](2) [ x ] [ x ](1) [ x ] [ x ]


NSD 70D



Transmit timing for the data circuit-terminating equipment (DCE) provided by the G3HR:

In this operating mode, the G3HR generates its own transmit timing signal (TT) and transmits it together withthe data signal (SD) to the DCE. The transmit timing signal (TT) can be either synchronised to the incomingdata signal (RD) (clock loop) or derived from the internal quartz oscillator.

Transmit and receive timing generated internally (G3HR):

Data is transferred between the G3HR and the DCE without transmitting a timing information. The receivetiming signal is generated internally in the G3HR and synchronised to the incoming data (RD). The outgoingdata signal (SD) can be transmitted in synchronism with the incoming data or with the internal clockfrequency of G3HR.

1 Switch setting of S1 (4) depending on internal clock frequency – ON: 56 kHz; OFF: 64 kHz2 Switch setting of S1 (3) depending on transit relaying mode – ON/OFF

SD (Send Data)

RD (Receive Data)

TT (Terminal Timing)

Data Circuit-TerminatingEquipment (DCE)

BA70DE27.DRW


Transmitter

Receiver

RD (Receive Data)

SD (Send Data)

Data Circuit-Terminating Equipment (DCE)

BA70DE28.DRW


Transmitter

Receiver



NSD 70D



3.1.3 Data interface G3HS (F.O. interface)The F.O. interface enables interference free data transmission from the teleprotection equipment to theoptical interface of the FOX - family. A direct point-to-point connection between the two NSD 70D terminals isalso possible over a maximum distance of 30 km without signal regeneration.

Two versions of the interface are available. Version 1 enables the transmission over a maximum distance of5 km. This transmission takes place exclusively through multimode fibres. Version 2 enables thetransmission over a maximum distance of 30 km. This transmission can be either through multimode orsinglemode fibres.

Transmission path: NSD 70D <=> NSD 70D

Transmission path: NSD 70D <=> FOX

OTX

ORX

Single- or Multimode Fibre1300 nm Wavelength

F.O. Interface G3HS NSD 70D

ORX

OTX

BA70DE34.DRW

F.O. Interface G3HS NSD 70D

OTX

ORX

Single- or Multimode Fibre1300 nm Wavelength

F.O. Interface G3HSNSD 70D

ORX

OTX

BA70DE35.DRW

Optical InterfaceFOX Family

NSD 70D



3.2 Principle of operationDuring normal operation the NSD 70D transmits a guard code. This signal is generated by the DSP moduleand passed on to the data interface which converts it to the corresponding line signal before sending it to themultiplexer.

At the receiver, the line signal coming from the multiplexer is entered via the data interface into the serialinput register of the processor and is continuously evaluated. Alarm is given should the bit error rate exceed apre-set level (setting range 10-3 to 10-6).

Upon being instructed to send one or more commands, the NSD 70D interrupts the guard signal andtransmits the command codes in sequence. Command codes recognized by the receiver as being genuineappear at the appropriate output after a set code evaluation time of 1 ms or 4 ms.

Should no signal be received at all (i.e. neither command nor guard code), the unblocking output contactsclose for 200 ms.

Digital signal processing

All signal processing, i.e. the generation of tripping signals and the evaluation of signals being received, isperformed completely digitally by a signal processor on the DSP (Digital Signal Processing) module. The datainterface converts the codes into a line signal conforming to the interface in use. The digital techniquesemployed obviate any need for calibration.

Special algorithms are used to evaluate the signals at the receiver. These ensure the high dependability forgenuine tripping signals and security against spurious tripping signals necessary in protection applicationseven if the communications channel is disturbed.

Programming

Programming switches are provided for setting the operating parameters, i.e. choice of transmission time, thealarm threshold and the response of the unit in the event of an alarm.

Adding further command inputs/outputs (up to 6) is accomplished by simply inserting additional relay in-terfaces. There is no room for trip counters (G3HF), if there are more than 4 commands because their rackslots are occupied by relay interfaces. From firmware release 1.1.00 onwards, internal trip counters areprovided for all six commands. They are, however, volatile and their counts are lost should the power supplybe interrupted or the reset be operated.

Testing during operation

An automatic loop testing routine cyclically checks the teleprotection channel. The test signal which istransmitted in the same way as a genuine tripping signal is recognized by the receiver and "reflected" back tothe transmit station. The test routine is terminated, providing the test signal arrives back at the initiatingNSD 70D, otherwise it is repeated and alarm is given should the result of eight subsequent trials be negative.

The loop test can also be initiated manually at any of the stations by pressing a button on the front of theequipment. A LED indicates the result of the test.Internal test routines continuously monitor the availability of the NSD 70D.

NSD 70D



An NSD 70D unit can also interrogate the status of the remote unit and give alarm if necessary. Informationregarding the nature of the problem is contained in the signal received.

A serial interface is provided on the front of the unit for service and diagnostic purposes, via which with theaid of a pocket terminal or a PC details of equipment settings, firmware release, operating parameters andalarm signals generated by the local and remote units are available.

The tests do not impair the equipment's ability to operate if need be, i.e. a proper tripping signal always takespriority over any test procedures.

Alarm signals

The following criteria are monitored and generate alarm signals:

- bit error rate of guard or tripping signal codes too high- loss of incoming signal (data or clock)- AIS (Alarm Indication Signal)- loss of synchronisation (Tx / Rx)- alarm signal from the remote station (programmable)- bit error rate above the set level (see Section 7.1.2)- single component error (Tx / Rx)- power supply failure- local test mode activated- response of internal test routines (Checksum, RAM, loop test, watchdog, programming switches, ICLK)- tripping signal longer than 2.5 s (alarm can be inhibited for continuous signal transmission and applies

to all commands simultaneously)- address error (device addresses can be programmed from firmware release 1.2.00 onwards, see

Section 8.7)

Alarm signals are emitted via potentially-free contacts:

- 1 common alarm on each relay interface common alarm- 2 common alarms on the alarm interface = combination of all actual alarm signals (see above)

The alarm signalling relays have pick-up time delays with a setting range of 80 ms to 10 seconds (alarminterface) respectively 50 ms to 2.0 seconds for the alarm relay on the relay interface (see block diagram inSection 3.3).The alarm relays have a fixed reset time delay of 2 seconds (alarm and relay interface).

Programming switches facilitate the selection of how the command outputs should respond in the event oflost incoming signal (data or clock, i.e. Rx sync Alarm), a bit error rate above the alarm threshold setting, thereceipt of an AIS signal or an addressing error:

- The alarm status has no influence on the command outputs.- Command outputs are set to active (tripping status).- Command outputs are set inactive (guard status).- Command outputs retain the statuses they had immediately prior to the alarm.

The setting applies to all the command outputs simultaneously.

NSD 70D



3.3 Assemblies and power supply unitsBlock diagram:

Power supply units G3HG, G3HH and G3HI (G3HK and G3HQ on request)

There are several types of power supply units which cover all the standard battery and AC power supplyvoltages. One power supply unit is capable of supplying a whole rack, i.e. a maximum of two NSD 70D's. Aredundant supply can be achieved by installing two power supply units, which may be combined in anydesired fashion.Refer to Technical Data in Section 6 for the input voltages.

DSP module G3HP

The signal processing module G3HP contains essentially the functions for generating the digital outgoingtransmitter signal and evaluating the incoming receiver signal, the alarm display and the programmingswitches.

The diagnostic connector for a pocket terminal or a PC is located on the front of the module.

Data interface G3HM (PCM Interface)

The PCM interface G3HM includes a codirectional and a contradirectional interface. The desired operatingmode can be selected using a jumper plug. The PCM interface converts the digital signal provided by theprocessor into a line signal (LS) conforming to CCITT G.703.

ALARMInterface

G3HE

UNBLOCKING 1

UNBLOCKING 2

Alarm

Alarm

DC

24VDC

Tx

Rx

Alarm

Alarm

24V5V

RELAYInterface

G3HC(G3HD)

Tx Command

Rx Command

Rx AUXCOMMON ALARM 1

COMMON ALARM 2

RELAYInterface

G3HC(G3HD)

Tx Command

Rx Command

Rx AUX

SUPPLY 1

SUPPLY 2

Alarm

TRIPCounterG3HF

D

D

Data signal

Data signal

Transmit clock

Receive clock

DATAInterface

DigitalSignal

Processing

G3HP

RDY

GRD

TRP

SYN

BER

LS

LS

BA70DE03.DRW

Tx

Rx

Alarm

24VDC

AC or

AC orDC

NSD 70D



Data interface G3HR (RS-422 Interface)

The RS-422/V.11 interface G3HR generates a line signal (LS) conforming to the following interfacerecommendations: RS-449, X.21 and RS-530 (SUB-D connectors, optionally via isolating terminals). Thedesired operating mode is determined by the external cable (see Section 5.2). The RS-422 interface convertsthe digital data signal from the processor into a line signal conforming to the RS-422/V.11 recommendation.Data transmission can also take place via optical fibre link by installing an additional external fibreopticmodem.

Data interface G3HS (Fibre Optic Interface)

The F.O. interface G3HS enables the transmission of the digital data signals over fibre optic cables. It isavailable in two versions. The lower priced model is sufficient up to a maximum distance of 5 km and thetransmission takes place exclusively through multimode fibres. The slightly more expensive version enablestransmission up to 30 km max. when using singlemode fibres or up to 18 km with multimode fibres. Theconnection of the optical cables is made with FC/PC plugs into the G3HS up to 30 km and with ST plugs intothe G3HS up to 5 km (accessible from the front of the equipment).

Relay interfaces G3HC, G3HD

The relay interface establishes the link with the protection relay. Each NSD 70D can have a maximum of 6interfaces of either type. Each interface contains the transmitting and receiving circuits for one command anda common alarm output. An auxiliary command output is associated with each main output and can be used,for example, for controlling an event recorder. All input and output circuits are potentially-free and DCisolated.

Alarm interface G3HE

The alarm interface includes the functions of the power supply monitor, internal 5 V supply, alarm relaydrivers and the unblocking (deblocking) logic with its auxiliary relays.The internal 5 V supply can be duplicated by inserting a second alarm interface G3HE. A duplication of thealarm and unblocking outputs is also possible where there is only one NSD 70D unit per rack.

Trip counter G3HF (optional)

The trip counter module contains two two-digit counters for recording the numbers of transmitted andreceived commands. The display can be switched between the two combinations of NSD 70D commandsA/B or D/E. The counts remain intact in the event of an power supply failure.

Pocket terminal (optional)

The pocket terminal resembles a pocket calculator and enables information on NSD 70D equipment settings,actual transmission time, operating status, firmware release and alarm messages to be accessed at any timevia the serial interface. This takes place without affecting the system's operating.

Equipment rack G7BGa

The equipment rack can accommodate either one or two complete NSD 70D units.The racks and the different complements of units therein are described in Section 4.More detailed descriptions of the modules are given in Section 7.

NSD 70D



3.4 Frontplate signals and controlsFront view of the various modules (does not correspond to their order in the rack !):

BA70DD29.DRW

AL1

3

0V

121314

PCM INTERF

Tx SIG

1011 Rx SYNC

Tx SYNC

G3HM

Rx DATA

Tx DATA

+24V

SUPPLY

G3HG

AL

RDY

TRPGRD

76

COM1

1

345

DSP

89

TSTRES

SYNBER

G3HP

AL1

3

0V

121314

+5V+24V

G3HE

+5V

ALARM

AL1

34

INTERF 1

G3HC

TxRx

G3HF

COUNTER

Trip TX

Trip RX

14

DISP A

DISP BRESET

AL1

3

F.O. INTERF

Tx DATA

G3HS

4 Rx DATA

OTX

ORX

AL1

3

RS-422/V.11

Tx DATA

G3HR

4 Rx DATA

RS-530

LED's:

Designation Module

"+24V" G3HG/H/I Power supply unit standing by (green)G3HK/Q 24 VDC supply available.

" +5V" G3HE 5 V aux. DC converter standing by (green)internal 5 V power supply available.

"AL" various Common alarm (red)This LED lights on all the units that the alarm concerns.

"RDY" G3HP Ready (green)The unit is switched on, initialised and ready for operation.

"GRD" G3HP Guard (green)Lights whenever the guard signal is being received.

"TRP" G3HP Trip (green)The tripping signal receiver has picked up.

NSD 70D



"SYN" G3HP Loss of synchronism (red)Absence of the 8 kHz synchronisation clock (TX or RX) or detection of theAIS.

"BER" G3HP BER alarm (red)Bit error rate BER > 1E-03 or the set bit error rate.

"Tx SIG" G3HM Transmit alarm (red)No valid code word is being transmitted.

"AL" G3HM Receive alarm (red)No signal being received.

"Tx DATA" G3HR Transmit data valid (green)A valid code word is being transmitted

"Rx DATA" G3HR Receive data valid (green)A valid code word is being received

"Tx DATA" G3HS Transmit data valid (green)A valid code word is being transmitted

"Rx DATA" G3HS Receive data valid (green)A valid code word is being received

"Tx" G3HC/D Transmit command (green)Lights while the corresponding command is being transmitted.

"Rx" G3HC/D Receive command (green)Lights while the corresponding command is being received.

"TRIP Tx" G3HF Transmit trip counterThe number of commands transmitted is displayed (00 ... 99).

"TRIP Rx" G3HF Receive trip counterThe number of commands received is displayed (00 ... 99).

Controls:

Designation Module

"TST" G3HP Test (black pushbutton)Pushbutton for manually initiating a loop test.

"RES" G3HP Reset (red pushbutton)Pushbutton for reinitialising the signal processor(outputs are blocked for approx. 5 s).

"COM1" G3HP Serial interface for the connection of a terminal.

"DISP" G3HF Switch for selecting the counts of commands A/B or D/E to display."RESET" G3HF Pushbutton (red) for resetting the trip counter.

"RS-530" G3HR Serial data interface RS-530

"OTX" G3HS F.O. interface transmit signal, FC/PC or ST plugs.

"ORX" G3HS F.O. interface receive signal, FC/PC or ST plugs.

NSD 70D



Test sockets:

Designation Module

"+24V" G3HE 24 V supply voltage" +5V" G3HE 5 V aux. supply voltage" 0V" G3HE 0 V signal ground, earth.

"Tx DATA" G3HM 64 kBit transmitter data signal"Tx SYNC" G3HM 8 kHz transmitter synchronisation signal"Rx DATA" G3HM 64 kBit receiver data signal"Rx SYNC" G3HM 8 kHz receiver synchronisation signal" 0V" G3HM 0 V signal ground, earth.

Rear of rack:

"ON", "OFF" Switch for switching the NSD 70D on and off(only secondary side of supply unit, primary still switched on).

NSD 70D

Utility Communication Systems Rack assemblies


4. MODULES FITTED IN RACKS AND ALTERNATIVE VERSIONS

The following figures show alternative combinations of units in an NSD 70D rack. Where more than one typeis given for a slot, any of the units may be inserted without restrictions.

1

G3HCG3HD

RELAYINTER-FACE 1orRELAYINTER-FACE 2

G3HCG3HD

RELAY INTER-FACE 1orRELAYINTER-FACE 2

G3HE

ALARM INTER-FACE

G3HCG3HD


G3HCG3HD


G3HGG3HIG3HHG3HKG3HQ

SUPPLY

48/60VDC110VAC/DC230VAC/DC

Power supplies

G3HFG3HCG3HD

TRIPCOUNTERorRELAYINTER-FACE 1or RELAYINTER-FACE 2

G3HFG3HCG3HD

TRIPCOUNTERorRELAYINTER-FACE1or RELAYINTER-FACE2

G3HE

ALARM INTER-FACE

9 17 21 28 34 40 46 51 55 62 68 74 80

G3HPG3HGG3HIG3HHG3HKG3HQ

SUPPLY


Device 1 Device 2

G3HP

DSPMO-DULE

DSPMO-DULE

Basic equipment with 1 NSD 70D and 1 command2 independent devices, each with 2 commands and trip counter or 3 commands without trip counter

BA70DE05.DRW

X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12

X..... Connector position on the backplate

G3HMG3HRG3HS

PCM -INTER-FACEorRS-422INTER-FACEorF.O.INTER-FACE

G3HMG3HRG3HS


1

G3HCG3HD

RELAYINTER-FACE 1orRELAYINTERFACE 2

G3HCG3HD

RELAY INTER-FACE 1orRELAYINTER-FACE 2

G3HCG3HD

RELAYINTER-FACE 1orRELAYINTERFACE 2

G3HCG3HD



SUPPLY


Power supplies

G3HFG3HCG3HD

TRIPCOUNTERorRELAYINTER-FACE 1or RELAYINTER-FACE 2

G3HFG3HCG3HD

TRIPCOUNTERorRELAYINTER-FACE 1or RELAYINTERFACE 2

G3HE

ALARMINTER-FACE

9 17

G3HP

21 28 34 40 46 51 55 62 68 74 80


SUPPLY


Device 1

DSPMO-DULE

Basic equipment with 1 NSD 70D and 1 commandFull version with 6 commands without trip counters or 4 commands with trip counters

BA70DE06.DRW

X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12

X..... Connector position on the backplate

G3HMG3HRG3HS


The smallest version of an NSD 70D for one command comprises the following:

- 1 rack type G7BGa- 1 power supply unit type G3HG, G3HI, G3HH, G3HK or G3HQ- 1 DSP module type G3HP- 1 data interface type G3HM, G3HR or G3HS- 1 alarm interface type G3HE- 1 relay interface type G3HC or G3HD

NSD 70D

Utility Communication Systems Rack assemblies


- 2 connecting cables type V9LE, one for the alarm interface and one for the relay interface- 1 connecting cable for the data interface (V9LF for the PCM interface type G3HM / V9MG, V9MH,

V9MI or V9MK for the RS-422 interface type G3HR / V9FZ, V9GA or V9GD for the F.O. interface typeG3HS up to 30 km / V9GB, V9GC or V9LZ for the F.O. interface type G3HS up to 5 km).

The rack G7BGa is fitted with a wiring PCB type G1CY and is able to accommodate two independentNSD 70D units or a single NSD 70D unit with up to 6 commands. When two NSD 70D's are used in a T-station, the corresponding signals are linked by jumper plugs on the backplate PCB.

The power supply for two NSD 70D's can be derived in one of the following ways:

- A single unit supplies both NSD 70D's, i.e. one unit supplies the complete rack.- Two units supply both NSD 70D's in parallel, i.e. the power supply is redundant.- The left-hand unit [N1] supplies one NSD 70D and the right-hand unit [N9] supplies the other. One rack

can thus house two independent NSD 70D systems each with up to 3 commands.

Two power supply units of any type may be combined in any way desired.

NSD 70D

Utility Communication Systems Mechanical features


5. MECHANICAL FEATURES

5.1 Modules and assembliesThe NSD 70D modules are designed for Europe format PCB's of the K80 type having a height of 3U(133.4 mm) and a depth of 160 mm. Power supply units (SUPPLY) have a width of 8R (40.6 mm), the firstone being located at slot N1 and the second one at slot N9. The DSP module is 4R (20.3 mm) wide and isinserted immediately next to the second power supply unit. All other modules have a width of 6R (30.5 mm).The frontplates of interface 1 type G3HC, interface 2 type G3HD, the alarm interface type G3HE and the tripcounter type G3HF are displaced by 1R to the left to make room for a personnel protection guard, becausethe station battery voltage is present also on the soldered side of the PCB.

Units fitted in G7BGa:

AL

RDY

TRPGRD

76

COM1

AL1 1

3345

DSP

89

TSTRES

AL1

3

AL1

34

INTERF 1

AL1

34

INTERF 1

0V

121314 0V

121314

+5V+24V

+5V

ALARM COUNTER

Trip TX

Trip RX

14

DISP A

DISP BRESET

+24V

SUPPLY

+24V

SUPPLY

AL

RDY

TRPGRD

76

COM1

1

345

DSP

89

TSTRES

AL1

3

AL1

34

INTERF 1

AL1

34

INTERF 1

0V

121314

+5V+24V

+5V

ALARM COUNTER

Trip TX

Trip RX

14

DISP A

DISP BRESET

TxRx

TxRx

TxRx

TxRx

PCM INTERF

Tx SIG

1011 Rx SYNC

Tx SYNC

Rx DATA

Tx DATA

Full mounted NSD 70D rack G7BG

SYNBER

SYNBER

AL

RDY

TRPGRD

76

COM1

AL1 1

3345

DSP

89

TSTRES

AL1

3

AL1

34

INTERF 1

G3HC

AL1

34

INTERF 1

G3HC

0V

121314 0V

121314

+5V+24V

G3HE

+5V

ALARM

+24V

SUPPLY

G3HG

+24V

SUPPLY

G3HG

AL1

34

INTERF 1

AL1

34

INTERF 1

G3HC

TxRx

TxRx

TxRx

TxRx

PCM INTERF

Tx SIG

1011 Rx SYNC

Tx SYNC

AL1

34

INTERF 1

TxRx

AL1

34

TxRx

INTERF 1

G3HM

Rx DATA

Tx DATA

SYNBER

G3HP G3HC G3HCG3HC

BA70DE07.DRW

AL1

3

RS-422/V.11

Tx DATA4 Rx DATA

G3HC G3HCG3HE G3HFG3HGG3HG G3HCG3HE G3HFG3HM G3HPG3HP G3HR G3HC

RS-530

4R 6R8R 8R 4R6R 6R 6R 6R 6R 6R 6R 6R 6R

The rack assemblies are 19" wide and 3U high, corresponding to 133.4 mm, and have a depth of 245 mmincluding the depth of the side plates. Provision is made for fitting an optionally available plate with a stripalong the lower edge of the rack for labelling the units, which increases the overall height of the rack by oneASA division (1 ASA division = 1U = 44.5 mm).Also available are a cable duct and a screening cover for the backplate.

NSD 70D



5.2 External connections

Power supplyThe power supply is connected to FASTON terminals (6.3 mm) on the left-hand side of the rack.

The upper terminals are those for power supply unit 1 located at slot N1 and the lower ones for power supplyunit 2 at slot N9. All power supply units are DC isolated from earth and between primary and secondary.

DANGER Unused faston connectors have to be covered.Faston connectors on the rack must be covered with anisolation sleeve.Cover for unused faston plugHESG455631P0001Isolation sleeve for faston connectorNBT 402942P0008

Caution Where two power supply units having different primaryvoltages are installed, special attention must be paid thatthe wiring on the side plate is correct! If either the wiringor the units themselves are reversed a power supply unitmay suffer damage.

Switch S1 and S2Separate ON/OFF switches are fitted on the rear of the rack for each NSD 70D, i.e. for each half of a rack,which interrupt the power supply voltages on the secondary side of the supply units. The primary stationbattery voltage is thus always switched on and the connections to the station battery or power supply shouldbe interrupted before withdrawing or inserting a power supply unit. Only the DSP-module, the data interface,the alarm module, the relays interfaces and the trip counter are switched off. A suitable means of interruptingthe supply must be provided at the time of installation.

Caution Neither removing nor inserting of modules is permittedduring power-up of the equipment. Proceeding to plugin and out of modules the power supply of theequipment has to be switched OFF.

There is a melting fuse (5 x 20 mm) in the primary circuit which is located at the rear of each supply unit. Thecurrent rating of the fuse depends on the type of power supply unit (see Technical Data in Section 6).

Signals

The connecting cables V9LF, V9LE and V9MK establish the connections between the backplate and theisolating terminals for the external signals. They have plug connectors at the equipment end and areterminated at isolating terminals for wire gauges up to 4 mm2 at the station wiring end. The cables V9MG,V9MH and V9MI are supplied with a 15, 25 or 37 pin SUB-D connector at the station wiring end.

Cable V9LF is 2500 mm long and conducts the PCM signals to the PCM interface G3HM. It is only everinserted into connectors X2 and X8 on the backplate.

The cables V9MG (X.21 Recommendation), V9MH (RS-530 Recommendation), V9MI (RS-449 Recommen-dation) and V9MK (screened cable with terminal block) are also 2500 mm long and are used to connect theline signals of the RS-422 interface. They are only ever inserted into connectors X2 and X8 on the backplate.

NSD 70D



Cable V9LE is yet again 2500 mm long and fits the connectors of modules G3HC, G3HD and G3HE. Itcarries the tripping and alarm signals and goes to the appropriate connector X3, X4, X5, or X9, X10, X11 onthe backplate.

DANGERA mixed up or a wrong connected cable can getdamage. If the cable V9LE is connected to a connectorX2 or X8 then the interfaces G3HM and G3HR can bedestroyed.

A special screwdriver is available for the terminal block. (See appendix A)

Various fibre optic cables are available to attach the optical signals to the F.O. interface G3HS. The choice ofthe cable is dependent upon the type of interface (G3HS up to 5 km or G3HS up to 30 km), the optical fibre(singlemode or multimode) and the kind of connection (cabinet internal connection - e.g. from NSD 70D tomultiplexer FOX 20 - or from the equipment to a splice box). The cables are either equipped with suitableplugs (ST or FC/PC) at one end or at both ends depending on the application. Detailed information can befound in Chapter 11.4.

�Note: The fibre optic connection must be especially cleaned

before they can be plugged in.

Caution The optical cable must be fixed together very carefullyto avoid damage. The ceramic sleeves are verysensitive. An improper application can take damage tothe FC/PC sleeves on the F.O. interfaces.

The connectors X... on the backplate are clearly marked by screen printed labels. The cables are inserted inthe lower half of the connectors X..., the upper half being used for the internal bus connections.

The cables themselves are labelled at the isolating terminal end.

NSD 70D



Wiring table for cable V9LE (for relay interface G3HC/D and alarm interface G3HE):

C-connector X3, X4, X5X9, X10, X11Pin No.

Core No. Signal name

G3HC/G3HD G3HE

TerminalNo.

c19 1 ALARM AL1 2c20 2 ALARM AL1 1c23 3 AUX AL2 4c24 4 AUX AL2 3c27 5 TX(+) UNBL1 6c28 6 TX(-) UNBL1 5c31/a31 7/8 RX(+) UNBL2 8c32/a32 9/10 RX(-) UNBL2 7

Wiring table for cable V9LF (for PCM interface G3HM):

C-connector X2/X8Pin No.

Core No. Signal name TerminalNo.

a24/c24 Shield GNDc18 1 RX-DATA1 1c19 2 RX-DATA2 2c21 3 RX-CLK1 3c22 4 RX-CLK2 4c26 5 TX-DATA1 5c27 6 TX-DATA2 6c29 7 TX-CLK1 7c30 8 TX-CLK2 8

NSD 70D



Wiring table for cable V9MG (for RS-422/X.21 interface G3HR):

C-connector X2/X8Pin No.

Core No Signalname

SUB-D connector(15 pin, male) Pin No.

1 SHIELD-1 1c26 2 SD-A 2c18 3 RD-A 4c29 4 ST-A 6a29 5 TT-A 7a22 6 GNDI-1 8c27 7 SD-B 9c19 8 RD-B 11c30 9 ST-B 13a30 10 TT-B 14a21 11 +5VI-1 15

Wiring table for cable V9MH (cable for RS-422/RS-530 interface G3HR):

C-connector X2/X8 Core No. Signalname

SUB-D connector(25 pin, male)

Pin No. Pin No.Frontplate Ext. cable

1 SHIELD-1 1 1c26 2 SD-A 2 2c18 3 RD-A 3 3

GNDI-2 7a22 4 GNDI-1 7c22 5 RT-B 9 9a30 6 TT-B 11 11c30 7 ST-B 12 12c27 8 SD-B 14 14c29 9 ST-A 15 15c19 10 RD-B 16 16c21 11 RT-A 17 17a21 12 +5VI-1 20

+5VI-2 20a29 13 TT-A 24 24

NSD 70D



Wiring table for cable V9MI (for RS-422/RS449 interface G3HR):


SUB-D connector(37 pin, male) Pin No.

1 SHIELD-1 1c26 2 SD-A 4c29 3 ST-A 5c18 4 RD-A 6c21 5 RT-A 8a21 6 +5VI-1 12a29 7 TT-A 17a22 8 GNDI-1 19c27 9 SD-B 22c30 10 ST-B 23c19 11 RD-B 24c22 12 RT-B 26a30 13 TT-B 35

Wiring table for cable V9MK (for RS-422 interface G3HR with terminal block):


Pin No.

c18 4 RD-A 1c19 11 RD-B 2c21 5 RT-A 3c22 12 RT-B 4c26 2 SD-A 5c27 9 SD-B 6c29 3 ST-A 7c30 10 ST-B 8a29 7 TT-A 9a30 13 TT-B 10a21 6 +5VI-1 11a22 8 GNDI-1 12

1 SHIELD-1 13

NSD 70D

Utility Communication Systems Technical data


6. TECHNICAL DATA

6.1 System dataNSD 70D complies with EMC Directive 89/336/EEC and the Low-Voltage Directive 73/23/EEC.

NSD 70D conforms to the Standard IEC 60834-1 "Teleprotection Equipment of Power Systems -Performance and Testing – Part 1: Command Systems”.

NSD 70D is year 2000 compliant!

Power supply units Input voltage:Type G3HI DC/DC converter 38 VDC to 71 VDC(48 VDC, 60 VDC) Primary fuse M2/250E*Type G3HH DC/DC converter 76 VDC to 180 VDC(110 VDC) Primary fuse M1.6/250E*Type G3HG DC/DC converter / AC/DC converter 195 VDC to 250 VDC(220 VDC, 230 VAC) Primary fuse M0.8/250C* 165 VAC to 250 VAC

Type G3HK (upon request) DC/DC converter 19 VDC to 45 VDC24 VDC) Primary fuse M3.15/250E*Type G3HQ (upon request) AC/DC converter. 88 VAC to 132 VAC(110 VAC) Primary fuse M1.6/250E* 98 VDC to 186 VDC

*M = medium slow C = without quenching E = with quenching

Power consumption typical 6 Wmaximum 10 W

No. of commands 1 to 6

Transmission times 2 steps (T01, T02) < 3 ms, < 6 ms (G3HC)(at 64 kBit/s) < 11 ms, < 14 ms (G3HD)

Command duration monitored at the transmitter, < 2.5 s ormonitor inhibited unlimited

Alarm outputs N/O or N/C contact 250 VDC, 150 W1 common alarm on relay interface2 common alarms on alarm interface

Alarm delay adjustable,see data on G3HC, G3HD and G3HE

Electrical safetyMeets the safety requirements according to IEC 60950 / EN 60950

NSD 70D



External connectionsPower supply FASTON connector 6.3 mmAlarms, commandsand data signals knife disconnect terminal block test socket screw

stranded wire 0.2 to 2.5 mm2

solid wire 0.2 to 4.0 mm2

stripping length 7 mmtorque 0.5 to 0.6 Nm

Ambient conditions

Operation:Climatic conditions Complies with IEC 60721-3-3, Class 3K5

Temperature range -5 to +45 °C < 24 h to +55 °CHumidity (non condensing) < 95 %, < 28 g/m3

Mechanical conditions Complies with IEC 60721-3-3, Class 3M1Vibration sinusoidal Complies with IEC 60068-2-6Shock Complies with IEC 60068-2-27

Transport: (equipment not energized)Climatic conditions Temperature range -30 to +70 °C

Humidity (non condensing) < 95 %, < 28 g/m3

Mechanical conditions Complies with IEC 60721-3-2, Class 2M1Vibration sinusoidal Complies with IEC 60068-2-6Shock Complies with IEC 60068-2-27Free fall(0.25m / equipment is packed) Complies with IEC 60068-2-32

Storage:Climatic conditions Temperature range -30 to +70 °C

Humidity (non condensing) < 95 %, < 28 g/m3

Mechanical conditions Complies with IEC 60721-3-1, Class 1M1

6.2 Electromagnetic compatibility and insulationThe equipment meets the EMC requirements for:

EmissionConducted radio frequency interference EN 55022 class A 150 kHz to 30 MHzRadiated radio frequency interference EN 55022 class A 30 MHz to 1 GHz

Immunity EN 50082-2Radiated electromagnetic field IEC 61000-4-3 class 3 27 to 1000 MHz, 80% AM

1 kHz repetition rate, 10 V/mRadiated electromagnetic field IEC 61000-4-3 class 3 900 MHz ± 5 MHz, 50% PM

ENV 50204 200 Hz repetition rate, 10 V/mRadiated electromagnetic field ENV 50204 1.89 GHz ± 10 MHz, 50% PM

200 Hz repetition rate, 10 V/m

NSD 70D



Relay interfaces types G3HC, G3HD, Alarm interface type G3HE and unblocking outputs:Insulation (dielectric) test (50 Hz 1 min) IEC 60950/ Prim/Earth 2.0 kV

IEC 60834-1 Prim/Sec 3.0 kV

Insulation resistance IEC 60834-1 ≥ 100 MOhm, 500 VDCImpulse withstand test (1.2 / 50 µs) IEC 60834-1 5 kV Common mode

5 kV Differential mode,except relay contacts:1.31 / 1.71 kV Differential mode1 as specified by the relay manufacturer

Fast transient burst(5/50 ns, 2.5 kHz repetition rate) IEC 61000-4-4 4 kV

Surge immunity test IEC 61000-4-5 4 kV Common mode2 kV Differential mode

Conducted radio frequency interference(0.15 to 80 MHz, AM, 1 kHz, 80%) IEC 61000-4-6 10 V (e.m.f.)

High frequency disturbance test(1 MHz, 400 Hz repetition rate, 2 s burst duration) IEC 61000-4-12 2.5 kV Common mode

1.25 kV Differential modeConducted common mode disturbance(frequency 50 Hz, continuous mode) IEC 61000-4-16 30 Vrms

PCM interface type G3HMInsulation (dielectric) test (50 Hz 1 min) IEC 60950/ Prim/Earth 0.5 kV


Insulation resistance IEC 60834-1 ≥ 100 MOhm, 500 VDC

Impulse withstand test (1.2/50 µs) IEC 60834-1 1 kV Common mode1 kV Differential mode

Fast transient burst(5/50 ns, 5 kHz repetition rate) IEC 61000-4-4 2 kV

Surge immunity test IEC 61000-4-5 2 kV Common mode



0.5 kV Differential mode

Conducted common mode disturbance(frequency 50 Hz, continuous mode) IEC 61000-4-16 30 Vrms

NSD 70D



RS-422 interface type G3HRInsulation (dielectric) test (50 Hz 1 min) IEC 60950/ Prim/Earth 0.5 kV





Surge immunity test IEC 61000-4-5 2 kV Common mode





Power supply units types G3HI / G3HHInsulation (dielectric) test (50 Hz 1 min) IEC 60950/ Prim/Earth 2.5 kV










NSD 70D



Power supply unit type G3HGInsulation (dielectric) test (50 Hz 1 min) IEC 60950/ Prim/Earth 2.5 kV










Rack, Frontplate elements, connectorsElectrostatic discharge (ESD) IEC 61000-4-2 15 kV air discharge

8 kV contact discharge

NSD 70D



6.3 DSP module type G3HPPower supply

Voltage +5 V ± 0.25 VCurrent load typical 0.28 A

maximum 0.65 AClock frequency 40 MHzMemories

Program PROM 16 kData RAM 16 k

TX trip counter: internal (firmware rel. 1.1.00 onwards)Time delay 750 us ± 250 usLatching time 0 ... 125 us

RX trip counter: internal (firmware rel.1.1.00 onwards)Time delay 0 usLatching time 4 ms to 10 ms

Monitoring and alarmTX/RX loss of synchronism delay < 1 ms

latching time < 1 sBit error monitor BER > set value

delay 1) 2 ... 60 s latching time 1) 2 ... 60 s

TX single component failure anti-valency of two criteria 100...150msChecksum error internal instantaneousRAM failure write/read error instantaneousLoop test failure after 8 unsuccessful attemptsUndervoltage +5 V supply Us < 4.5 VSystem clock failure instantaneousContinuous command if alarm enabled > 2.5 sRX single component failure on relay interface > 3 sProgramming switch position inadmissible instantaneousInternal calculation error instantaneousLocal test mode switched on internal instantaneousMissing ICLK (from data inter-face) or UART (COM1) defective 8 to 12 sAIS being received < 1 msCommon alarm instantaneousRemote alarm instantaneousAddressing error detection time 2) < 4 ms

alarm 3) < 100 ms

Diagnostic interface connector 9 pin SUB-D,(RS-232) data rate 1200 Baud

data bits 7parity nonestop bits 2compatible with VT100

1) Depends on bit error rate of the transmission channel (see Section 7.1.2)2) The command outputs are set to the programmed alarm state after this time.3) Time delay for an alarm (LED and message on terminal)

NSD 70D



6.4 Data interface6.4.1 PCM interface type G3HMPower supply

Input voltage +5 V ± 0.25 VCurrent load typical 75 mA from +5 V

maximum 110 mA from +5 V

Contradirectional interface

The coding scheme and waveforms conform to the CCITT G.703 recommendation.

Data signal outputNominal bit rate 64 kBit/sTolerance < ± 100 ppmLongitudinal conversion loss 32 kHz > 50 dBOutput impedance 120 OhmImpulse voltage nominal 1.0 V

Data and clock signal inputs (Rx/Tx)Nominal bit rate 64 kBit/sTolerance < ±100 ppmLongitudinal conversion loss 32 kHz / 64 kHz > 50 dBData input return loss 1.6 kHz to 3.2 kHz > 14 dB

3.2 kHz to 64 kHz > 18 dB64 kHz to 96 kHz > 28 dB

Clock input return loss 3.2 kHz to 6.4 kHz > 18 dB6.4 kHz to 128 kHz > 22 dB128 kHz to 192 kHz > 28 dB

Input impedance 120 OhmImpulse voltage nominal 1.0 V

Interference withstand for a cable attenuation of 3 dB 300 mVpp transverse

Screening cable shield grounding only one endat transmitter end(recommended)

Max. cable length with suitable wideband (LAN) 400 mcable (refer to Section 11.4)

NSD 70D



Codirectional interface

The coding scheme and waveforms conform to the CCITT G.703 recommendation.

Data and clock signal outputNominal bit rate 64 kBit/sNominal symbol rate 256 kBaudTolerance < ± 100 ppmLongitudinal conversion loss 128 kHz > 50 dBJitter amplitude according to CCITT G.823

Band B1 < 0.25 UIBand B2 < 0.05 UI

Output impedance 120 OhmImpulse voltage nominal 1.0 V

Data and clock signal inputsNominal bit rate 64 kBit/sNominal symbol rate 256 kBaudTolerance < ± 100 ppmLongitudinal conversion loss 128 kHz > 50 dBReturn loss 4 kHz to 13 kHz > 18 dB

13 kHz to 256 kHz > 25 dB256 kHz to 384 kHz > 20 dB

Input impedance 120 OhmImpulse voltage nominal 1.0 V

Interference withstand for a cable attenuation of 3 dB 300 mVpp transverse

Screening cable shield grounding only one endat transmitter end(recommended)

Max. cable length with suitable wideband (LAN) 400 mcable (refer to Section 11.4)

NSD 70D



6.4.2 RS-422 interface type G3HRPower supply:

Input voltage +5 V ± 0.25 VLoad current typical 56 mA

maximum 100 mA

Input voltage +24 V ± 1 VLoad current typical 20 mA

maximum 35 mA

Electrical data according to Standard: EIA RS-422-ACCITT V.11

Digital signal output (SD):Bit rate 64 kBit/s or 56 kBit/sOutput voltage with 100 Ohm load ≥ ± 2 V differential

Output transmit clock to DCE (TT):Clock frequency 64 kHz or 56 kHzTolerance < ± 100 ppmOutput voltage with 100 Ohm load ≥ ± 2 V differential

Supply output(+5VI-1/-2 to GNDI-1/-2):Voltage 5 V ± 0.25 VMaximum current 100 mA

Digital signal input (RD):Bit rate 64 kBit/s or 56 kBit/sInput voltage ≤ ± 6 V differential

± 7 V to signal groundSensitivity ≥ ± 0.2 VInput resistance selectable 100 Ohm or ≥ 4 kOhm

Input transmit clock (ST) and receive clock (RT):Clock frequency 64 kHz or 56 kHzInput voltage ≤ ± 6 V differential

≤ ± 7 V to signal earthSensitivity ≥ ± 0.2 VInput resistance selectable 100 Ohm or ≥ 4 kOhm

Cable termination resistance (RD, ST, RT) selectable 100 Ohm / ≥ 4 kOhm

Max. cable length internal transmit and receive clock on G3HR 1000 mexternal transmit and/or receive clock 500 m

Screening cable shield grounding only one end at transmitter end(recommended)

NSD 70D



6.4.3 F.O. interface type G3HS up to 5 kmOperating wavelength 1300 nm

Optical code Modified Coded Mark Inversion (MCMI)MM SM

Average optical power coupled into multimode-fibre 50/125 µm (Tu=25°C) ≥ -24 dBm -

Max. average optical received power (BER=1E-09) ≤ -18 dBm -Receiver sensitivity (BER=1E-09, 4.096 MBd, Tu=25°C) ≤ -33 dBm -

Optical power ratio (between power coupled into fibre and receiver sensitivity) 9 dB -Margin (temperature, ageing) 4 dB -Permissible optical attenuation 5 dB -Range (1.0 dB/km incl. splices) 0...5.0 km -

Optical transmitter power reduction none -

Optical transmission rate 4096 kBaudOptical transmission device LEDOptical plug connectors STJitter acceptance according CCITT Rec. G.823Jitter transfer function according CCITT Rec. G.921Laser class 1 according IEC 60825-1

6.4.4 F.O. interface type G3HS up to 30 kmOperating wavelength 1300 nm

Optical code Modified Coded Mark Inversion (MCMI)MM SM

Average optical power coupled into singlemode-fibre 10/125 µm (Tu=25°C) ≥ -20 dBmAverage optical power coupled into multimode-fibre 50/125 µm (Tu=25°C) ≥ -16 dBm

Max. average optical received power (BER=1E-09) ≤ -20 dBm ≤ -20 dBmReceiver sensitivity (BER=1E-09, 4.096 MBd, Tu=25°C) ≤ -40 dBm ≤ -40 dBm

Optical power ratio (between power coupled into fibre and receiver sensitivity) 24 dB 20 dBMargin (temperature, ageing) 6 dB 6 dBPermissible optical attenuation 18 dB 14 dBRange MM (1.0 dB/km incl. splices) 8....18 kmRange SM (0.47 dB/km incl. splices) 8...30 km

Optical transmitter power reduction type. 5 dB type. 5 dBRange with reduced transmitter power 0...8 km 0...8 km

Optical transmission rate 4096 kBaudOptical transmission device LEDOptical plug connectors FC/PCJitter acceptance according CCITT Rec. G.823Jitter transfer function according CCITT Rec. G.921Laser class 1 according IEC 60825-1

NSD 70D



6.5 Relay interface 1 type G3HCUniversal interface for blocking, permissive and direct transfer tripping schemes.

Power supplyVoltage 1 +24 V ± 1.0 VCurrent load typical 21 mA

maximum 50 mA

Voltage 2 5 V ± 0.25 VCurrent load typical 9 mA

maximum 15 mA

Command input opto coupler contact + batterybattery voltage 48 VDC to 250 VDCcontact burden < 10 mAswitching level 48 V...110 V 25 V typicalswitching level 125 V...250 V 70 V typicaloperating time < 850 usreverse polarity protection up to 300 VDC

Command outputMain output semiconductor relay

tripping command 250 VDC, < 2 AON / OFF ratio = 1 / 3up to 5 min / 15 min max.

continuous command 250 VDC < 1 AN/O contact current limited

(at about 3 A) 1leakage current < 300 uA (300 V, 70° C)pick-up delay < 250 usreverse polarity protection to 300 VDC

Auxiliary output N/O contact 250 VDC, 10 Wcurrent limiter series resistor (on board)pick-up delay < 2.5 ms

Signal prolongation adjustable with resistor < 5 ms to 500 msadjustable in steps < 5 ms, 20 ms, 100 mstolerance ± 30 %

1 Only for transient currents, e.g. cable capacitance discharge. CAUTION: the contact is not short-circuit proof !

NSD 70D



Alarm output 1 common alarm,N/O or N/C contact ≤ 150 W / ≤ 2000 VA

max. peak current (Fall back time ≤ 1 ms) ≤ 50 Acurrent limiter series resistor

(external application)

max. AC-load: cos ϕ = 1 8 A / 250 VAC 2

cos ϕ = 0.4 4 A / 250 VAC 2

max DC-load:

Battery voltage 1 max. DC resistive load forOn and Off commands

max. DC resistive load forswitch over

24 VDC 10.0 A 2 5.6 A 236 VDC 4.7 A 2 1.75 A 248 VDC 1.83 A 2 1.05 A60 VDC 1.12 A 0.83 A72 VDC 0.90 A 0.75 A96 VDC 0.71 A 0.66 A110 VDC 0.70 A 0.63 A220 VDC 0.60 A 0.56 A

Aux. alarm relay delay adj. pick-up time 50 ms to 2 sfixed reset time 2 s

6.6 Relay interface 2 type G3HDThis interface is equipped with an electro-mechanical relay with heavy-duty contacts and is suitable forswitching heavy loads. Transmission times are approx. 8 ms longer than with type G3HC.

Power supplyVoltage 1 +24 V ± 1.0 VCurrent load typical27 mA

maximum 74 mA

Voltage 2 5 V ± 0.25 VCurrent load typical3 mA

maximum 10 mA

Command input opto coupler contact + batterybattery voltage 48 VDC to 250 VDCcontact burden < 10 mAswitching level 48 V...110 V 25 V typicalswitching level 125 V...250 V 70 V typicaloperating time < 850 usreverse polarity protection to 300 VDC

1 Battery voltage complies to IEC 38 with tolerance: +20 % / -15 %2 The max. current is limited to 1.5 A when using the cable V9LE (or 3.0 A, but for terminals 7 and 8 only). The above

figures refer to the relay.

NSD 70D



Command outputMain output electromechanical relay,

N/O or N/C contact ≤ 150 W / ≤ 2000 VAmax. peak current (Fall back time ≤ 1 ms) ≤ 50 A

current limiter series resistor (on board)


cos ϕ = 0.4 4 A / 250 VAC 2

max DC-load:

Battery voltage 1 max. DC resistive load forOn and Off commands

max. DC resistive load forswitch over

24 VDC 10.0 A 2 5.6 A 236 VDC 4.7 A 2 1.75 A 248 VDC 1.83 A 2 1.05 A60 VDC 1.12 A 0.83 A72 VDC 0.90 A 0.75 A96 VDC 0.71 A 0.66 A

110 VDC 0.70 A 0.63 A220 VDC 0.60 A 0.56 A

Pick-up delay < 8 ms

Signal prolongation adjustable with resistor 20 ms to 500 msadjustable in steps 20 ms, 50 ms, 200 mstolerance ± 30 %

Auxiliary output same as main output

Alarm output 1 common alarmN/O or N/C contact same as main output

Aux. alarm relay delay adjustable pick-up time 50 ms to 2 sfixed reset time 2 s



NSD 70D



6.7 Alarm interface type G3HEPower supply

Voltage 1 +24 V ± 1.0 VCurrent load typical 110 mA

maximum 200 mA

Voltage 2 5 V ± 0.25 VCurrent supply typical 400 mA

maximum 900 mA

Alarm outputs electromech. relay,N/O or N/C contact ≤ 150 W / ≤ 2000 VA

max. peak current (Fall back time. ≤ 1ms) ≤ 50 Acurrent limiter series resistor

(external application)


cos ϕ = 0.4 4 A / 250 VAC 2

max DC-load:Battery voltage 1 max. DC resistive load for

On and Off commandsmax. DC resistive load for

switch over24VDC 10.0A 2 5.6A 2

36VDC 4.7A 2 1.75A 2

48VDC 1.83A 2 1.05A60VDC 1.12A 0.83A72VDC 0.90A 0.75A96VDC 0.71A 0.66A

110VDC 0.70A 0.63A220VDC 0.60A 0.56A

Pick-up delay adjustable 80 ms ... 10 sdefault 10 s

Reset delay fixed 2.5 s

Unblocking outputs 2 N/O contacts 250 VDC, 10 WMax. voltage < 250 VDCCurrent limiter series resistor

(on board)Cut-in delay < 2.5 msAdditional delay adjustable 1 ms .... 40 ms

default 10 msPulse length adjustable 50 ms .... 390 ms

default 200 mstolerance ± 50 %



NSD 70D



6.8 Trip counter type G3HFPower supply

Voltage 1 +24 V ± 1.0 VCurrent load typical 3 mA

maximum 31 mA

Voltage 2 5 V ± 0.25 VCurrent load typical 25 mA

maximum 34 mA

Trip countermax. count 99(counts through to 0 uponreaching maximum)Display switchover for signals A/B and D/E

Delay and latching time

Trip counter TX: Delay 2.8 ms ± 20 %Latching time 2.8 ms ± 20 %

Trip counter RX: Delay 640 us ± 20 %Latching time 640 us ± 20 %

NSD 70D



6.9 Mechanical dataRack

Outer dimensions height 3U (133 mm)incl. label strip and cable duct 4U (177 mm)width 19"depth (incl. side plate) 245 mm

External connections auxiliary supplies 6.3 mm FASTONPCM interface G3HM C connectorRS-422 interface G3HR C connector or SUB-DF.O. interface up to 5 km ST plug connectorsF.O. interface up to 30 km FC/PC plug connectorsrelay and alarm interfaces C connector

Weight rack with 1 NSD 70D approx. 6 kgrack with 2 NSD 70D's approx. 8 kg

DSP moduleDimensions height (PCB) 3U (100 mm)

width 4R (20.3 mm)depth 160 mm

Safety facility component side metal plate

Data interfacesDimensions height (PCB) 3U (100 mm)

width 6R (30.5 mm)depth 160 mm

Connector internal C connectorexternal C connector

Relay interfaces, alarm interface and trip counterDimensions height (PCB) 3U (100 mm)

width 6R (30.5 mm)depth 160 mmfrontplate displaced to left by 1R

Connector internal C connectorexternal C connector

Safety facility component side metal platesoldering side insulation plate

Connecting cableV9LF length 2500 mmV9LE length 2500 mmV9MG length 2500 mmV9MH length 2500 mmV9MI length 2500 mmV9MK length 2500 mmV9FZ length 4...99 mV9GA length 4...99 mV9GB length 4...99 mV9GC length 4...99 mV9GD length 4...99 mV9LZ length 4...99 m

NSD 70D

Utility Communication Systems Description of operation


7. DESCRIPTION OF OPERATION

7.1 DSP module G3HP7.1.1 HardwareBlock diagram:

The DSP module hardware comprises the signal processor with the data and program memories, the variousdigital input and output units, the clock supply, a serial interface and a "watchdog".

The digital inputs/outputs and the serial diagnostic interface are controlled via an 8 bit bus, which is comple-tely isolated from the fast 16 bit processor bus. Also connected to this bus are the 4 switches for program-ming the equipment and the LED displays on the frontplate. The input/output buffers for communicating withthe other modules are protected by series resistors and are short-circuit proof up to 24 V.

The signal processor is monitored by a watchdog, which upon picking up instantaneously actuates a commonalarm. The alarm relay are located on the alarm interface G3HE and on every relay interface G3HC/D. Theircontacts can be selected to be normally open (N/O) or normally closed (N/C).

SWITCH INPUT BUFFER

DIGITALSIGNALPROCESSOR

TMS 320C25

1

1

ser. input

ser. output

ADDRESS 12 BITDATA 16 BIT

PROM8k*8

RAM8k*8

PROM8k*8

RAM8k*8

WATCHDOG

UART

RS2

32

40MHz

ICLK

8 BITDATA

BUFF

ER

BUFF

ER

RESET

ALARM

COM1

BUFF

ER9 +5V4 DTR6 DSR8 RTS7 CTS

3 -RXD2 -TXD

5 GND

"AL"

"RDY"

"GRD"

"TRP"

RES

I/O-BUS

FSX

DRCLKR

FSR

-WR

MP3

BUFF

ER

PRXAPRXBPRXCPRXD

PTXAPTXBPTXCPTXD

COMMON ALARM

COM. AL.

DX

13a

1a2a3a4a6c7c3c5c

6a7a8a9a

12c

11c

10c

11a12a10a

3c

13c

5a1c

UNBLOCKING

BUFF

ER

PTXEPTXF

-TXGUARD

"SYN"

"BER"

PRXEPRXF

8c9c

-RXGUARD

BA70DD08.DRW

DSP MODULE (G3HP)

EVALUATION TIME; ALARM SETTINGS; BIT ERROR RATELOOP TEST; TRANSIT MODE

LOOP TEST

CLKX

NSD 70D



The input and output of characters via the diagnostic interface is performed by the UART unit and the RS-232interface converter. As soon as the UART receives a character, it informs the processor by means of ahardware interrupt. The processor reads the character via the 8 bit bus and sends the first character of thetext to be transferred back to the UART. The UART requests more characters with further interrupts until thetext to be transferred is complete.

The data interface of the receiver converts the line signal to a serial data format. These data are transferredto the processor via the lines FSR, DR and CLKR for further processing. In the transmitter, the data signalDX generated by the processor is read from the DSP's serial shift register with the aid of the clock and theframework information (CLKX and FSX) and transferred to the data interface which converts it to thecorresponding line signal for transmission.

NSD 70D



7.1.2 Firmware

RESET

TRANSMITTER

RECEIVER

PROM/RAM

ALARM

TERMINAL

PROM/RAMTEST

INIT

RECEIVER

INIT GUARD

TEST1

_RX_GUARD

TRANSIT

TRP

GRD

50ms

UNBLOCKING

_ALARMT&G

ALARM

TERMINAL

AL

COMMON_ALARM

INIT

_COMMON_ALARM

_ALARMT&G

TX-SIGNALCOMP. FAILURE

TRANSMITTER

INITTERMINAL

INIT

ALARM COM1

TESTACTIVE

TRIPACTIVE

ALARM

TEST1TERMINAL

PROM/RAM

_TX_GUARD

TRANSIT

INIT

ALARM

INIT

_TX_GUARD

INITIALISATION

TRANSIT-IN

ALARM

TEST MODE

S 4...7

_COMMON_ALARM

PTXA-PTXF

BER

BERLED

SYNLED SYN BER

SYN

PRXA-PRXF

PTXA-PTXF

RX TRIP COUNTER

TX TRIP COUNTER

BA70DD09.DRW

LOOP TEST

TEST MODE

TEST MODE

LOOP TEST

DATA SIGNAL

LOOP TEST

LOOP TESTLOOP TEST

DATA SIGNAL

NSD 70D



INITIALIZATION:

This functional block reads the switch positions and calculates the various parameters and constants. It alsoinitializes the serial interface (COM1). The block is activated after every reset.

PROM / RAM TEST:

Whilst the equipment is in operation, a test routine runs continuously which recalculates the PROM checksum and tests the write/read ability of the RAMs. A check sum error results in a common alarm. The RAMtest consists in writing different test patterns in every memory cell and reading them again. A failure of thetest also causes a common alarm. Information relating to the various alarms can be accessed using thespecial pocket terminal or an XT/AT PC. Providing any failure there may be which does not concern the basicfunctions, the NSD 70D remains fully operational, i.e. it continues to operate normally in spite of the alarm.

RECEIVER:

The receiver detects the data signals coming from the data interface. If neither a tripping signal, a guardsignal nor a loop test signal is being received or if the AIS (Alarm Indication Signal) is being received, a 50 msunblocking signal is generated. The duration of the unblocking signal is increased by the alarm interface to200 ms.

The bit error rate is determined over a period of approximately 60 s and refreshed every 2.5 s. The pick-uptime of the alarm depends on the bit error rate measured within a 2.5 s period. A gradual increase in the biterror rate results in a maximum pick-up delay of approximately 60 s. Bursts of noise cause the alarm to begiven more quickly (about 2.5 s). Following severe noise, the alarm latching time can be up to 60 s. Duringthis period the command outputs are set to their programmed states (e.g. blocked; programming see "Alarmlatching" in Section 10.1).

The receiver also includes the RX SYNC monitor.

ALARM:

The common alarm is registered by the DSP module, but does not have a direct influence on its operation.

A number of alarm messages are generated internally (see Section 13.1.2). If correspondingly programmed,it is possible to monitor the status of the equipment in the remote station and give alarm in the local station.The alarm configuration switch S7 (5,6) enables a choice to be made between the command output contactsopening, closing, not responding at all or retaining their last valid state immediately prior to the alarm.

NSD 70D



TRANSMITTER:

The transmitter monitors the tripping signal inputs PTXA to PTXF and the TX_GUARD signal. In the event ofa command, both signals must change their statuses. Should only one of these signals remain active forlonger than 1 s, a single component failure is signalled to the alarm block.The guard signal is transmitted providing neither a command nor a loop test is in progress.

LOOP TEST:

The loop test can be initiated either manually or automatically by an internal timer. Providing the automaticloop test mode is not inhibited on programming switch 4 (5), a test signal is transmitted to the opposite stationevery 6 hours and echoed back. The test signal is transmitted and processed in the same way as an actualtripping signal. Thus all the internal functions needed to transmit a tripping signal are included in the test.Should a manually initiated test signal not be received, the alarm LED "AL" lights for about 3 seconds. Thenon-echo of an automatically initiated loop test signal results in the test being repeated at intervals of 5 min-utes until there is either a response from the opposite station or 8 unsuccessful attempts have been made, inwhich case an alarm is given.A genuine command is always given priority over all tests!

TERMINAL:

Information on the settings of the teleprotection equipment and any alarms can be obtained via the serialinterface on the front of the DSP module G3HP. The information can be accessed using either the optionallyavailable pocket terminal or a standard XT/AT PC.

TEST MODE:

The test mode is selected by means of a programming switch. It enables the relay interfaces type G3HC/Dand the DSP module type G3HP to be tested in a local closed-circuit loop. This facility can be used, for ex-ample, for checking the command prolongation time set on the relay interface. The equipment is in the alarmstatus when the local test mode is activated.In the test mode, the tripping signals PTXA to PTXF are entered and relayed directly to outputs PRXA toPRXF. The TX_GUARD signal continues to be monitored as in the normal operating mode.The guard signal continues to be transmitted to the remote station during the local loop test.

TX TRIP COUNTER, RX TRIP COUNTER:

Internal trip counters are available from firmware release 1.1.00. No buffer battery is provided, so that thecounter information is lost following an interruption of the power supply or a reset. Where all 6 commands arebeing used with internal counters, a second redundant power supply unit is recommended.The capacity of the counters is 65535. Their actual level can be obtained using the pocket terminal or astandard XT/AT PC.The trip counters monitor the digital signals (PTXA ... F and PRXA ... F) between the DSP module and therelay interfaces. The internal trip counters (firmware) have fixed delay and latching time settings and differ inthis respect to the external trip counters (G3HF).The latter are controlled by the relay interfaces which prolongthe digital signals (PRXA ... F) by a pre-set command latching time.

NSD 70D



7.2 Data Interface7.2.1 PCM interface G3HMBlock diagram:

cod

con

CON-DR

CON-FSR

COD-DR

COD-FSR

COD-CLKR

CON-CLKR

cod

con

MUX

MUX

cod/ con

cod/ con

T-INP0

T-INP1

T-INP2

COD-DX

COD-FSX

COD-CLKX

CON-DX

CON-FSX

CON-CLKX

DX

FSX

CLKX

T-OUT1

T-OUT2

T-OUT0

DR

FSR

CLKR

f1f2

CLKI

ALARM

MUX

7

8

5

6

RX-DATA

RX-CLK

TX-CLK

TX-DATA

MAMB

+5V

+5V

MCMD

5a

6a

4a

11a

10a

9a

9c

10c

11c

12a

3c

3a

8a

7a

22a,c

21a,c

18a,c

19a,c

29a,c

30a,c

27a,c

26a,c

3

4

1

2

V9LF

BA70DD10.DRW

Tx DATA Tx SYNC

Rx SYNC

Rx DATA

TR/NORM

+clock sync.

alarm 4.9152MHz+ 4.096MHz clock

64kHz+8kHzdecoder

contradirect.data decoder

codirectionaldata decoder + clock sync.

codirectionaldata coder

64kHz+8kHzdecoder

contradirect.data coder

The +5 V power supply for the PCM interface comes from the alarm interface.

Codirectional and contradirectional interfaces are both included in the PCM interface module and can beselected according to the application by appropriately positioning the jumper plugs MA and MB.

In the codirectional mode, the 64 kBit/s data/clock signal is applied to an amplitude detector via an isolatingtransformer and is converted to a serial digital data signal. The 8 kHz synchronisation signal (COD-FSR) andthe 64 kHz clock signal (COD-CLKR) are extracted from the data/clock signal and applied together with thedata signal (COD-DR) via the changeover switch cod/con to the processor (G3HP).The data signal in the processor's serial register at the transmitter end is read with the aid of the 8 kHz and64 kHz clock signals (COD-FSX and COD-CLKX) and is then converted to conform to CCITT G.703 before itpasses via the line driver and isolating transformer to the multiplexer.

In the contradirectional mode, the combined clock signal (8 kHz and 64 kHz) is received by the PCM 30multiplexer via two additional pairs of cores. The incoming AMI coded clock signal is applied via an isolatingtransformer to the amplitude detector. The incoming data signal is read with the aid of the decoded clocksignal and then goes to the processor via the changeover switch cod/con.

At the transmitter end, the data signal from the processor is converted to the AMI code in synchronism withthe clock signal being received (TX-CLK). It then goes via the line driver and isolating transformer to thePCM 30 multiplexer.

NSD 70D



7.2.2 RS-422 interface G3HRBlock diagram:

T-INP0 3a

13a,c

18a,c RD-A

RD-B

RT-A

RT-B

R22

ST-B

SHIELD

ST-B

ST-A

RT-B

RT-A

RD-B

RD-A

GNDI-2

+5VI-2

SD-A

SD-A

SD-B

SD-B

19a,c

21c

22c

29c

30c

1

3

16

17

TT-A

TT-B

+5VI-1

GNDI-1

9

15

12

20

7

2

14

24

11

21a

22a

26a,c

27a,c

TT-A

TT-B

29a

30a

T-OUT1 5a

T-OUT2 6a

T-OUT0 4a

DR

FSR

CLKR

11a

10a

9a

T-INP2

T-INP1

8a

7a

I-CLK 12a

COMMON-AL 3c

14a,c

15/16a,c

+24V

+5V

DX 11c

FSX 10c

CLKX 9c

MUX

BA70DE30.DRW

RD

RT

ST

SD

TT

INT. CLOCK

TT SYNCH.Rx SYNCH..

Tx CLOCK

TRANSIT

TT

NSD 70D RS-422 INTERFACE G3HR

ALARMAL

MONITORINGTx DATA Rx DATA

CLOCK4.096MHz

CLOCKSYNCHRO-NISATION

f1

f2

f1

f2

Rx CLOCK

S1.2

S1.3

S1.6S1.5

S1.4

S1.1S1.7

SY3

ST-A

R21

SY2

R20

SY1

CLOCK4.9152MHz

f1

f2

f1

f2

R19

RS-

530

(Fro

ntpl

ate)

V9M

G (X

.21)

, V9M

H (R

S-53

0), .

.....

V9M

I (R

S-44

9), V

9MK

(Ter

min

als) DATA DECODING /

CLOCK SYNCHRO-NISATION

DATA ENCODING /CLOCK SYNCHRO-

NISATION

The electrical characteristics of the RS-422 interface conform to the EIA RS-422-A standard which is fullycompatible with CCITT recommendations V.11 and X.27 and also Part 3 of DIN 66259. The data transfer rateis either 64 kBit/s or 56 kBit/s.

The RS-422 interface converts the 8 bit code word from the DSP module into a 10 bit data word. This signalhas a Hamming distance of at least 3 and also contains the synchronisation information which guaranteessafe and reliable transmission. Data transmission also tolerates bit errors and supports fast resynchronisationfollowing an error (normally within two data words).At the transmit end, the data signal (DX) in the DSP's serial shift register is read with the aid of the clock(CLKX) and the frame synchroniser (FSX) and then transferred to the line driver via the code conversion

NSD 70D



circuit (8 Bit → 10 Bit) and the opto coupler. The transmit timing signal can be taken either from an externalsource (ST-A, ST-B) or from the internal clock. The internal clock can be synchronised to the incoming data(RD) by appropriate programming. When using the internal clocks, the terminal timing signal (TT) can betransferred to the DCE via the opto coupler and the line driver (TT-A, TT-B).

At the receiver end, the data signal (RD-A, RD-B) goes to the code converter via the line receiver and optocoupler. The code converter transforms the 10 Bit line signal (RD) into an 8 Bit code word which is thentransferred to the DSP module via the multiplexer (DR). The receiver clock is synchronised either to anexternal receive timing signal (RT-A, RT-B) or to an internal clock which itself can be synchronised to theincoming data.

In a T-station, the incoming data and the clock information are transferred to the second DSP module(T-OUT0...2) in the same rack. Correspondingly, the data and clock signal (T-INP0...2) coming from thesecond DSP module pass to the first DSP module via the multiplexer.

A 5 V DC isolated voltage is available at the connector on the frontplate or is supplied via the external cableswhich can be used, for example, to supply a modem for an optical fibre link.

Cable termination resistance:

The three signal inputs RD (receive data), RT (receive timing) and ST (transmit timing) normally have a highimpedance (≥4 kOhm). Where necessary, they may also be terminated with 100 Ohms by connecting thesolder pads SY1, SY2 and SY3 with a blob of solder.The use of a termination resistance is recommended where signal transmission times are high, i.e. when thelength of the cable is approaching its maximum permissible limit. The resistor maintains the signal rise timesand minimises reflections, but at the cost of signal amplitude.The maximum permissible cable length for pure data exchange between an NSD 70D and the data circuit-terminating equipment is 1000 m (line signals SD and RD). If timing information is being obtained from theDCE (ST and RT), the maximum permissible cable length reduces to 500 m.

Grounding arrangements:

All signal lines on the module G3HR are DC isolated by opto couplers from the external circuits. The powersupply those components adjacent to the periphery (line drivers, line receivers, protection devices) is also DCisolated from the internal circuits by a DC/DC converter. The insulation voltage of the external connections toground is at least 500 V r.m.s. (50 Hz, 1 min.) thanks to these precautions.Where circumstances demand, the signal ground (GNDI) can be connected in one of two ways according toEIA RS-422-A to the frame ground (Caution: Circuits no longer DC isolated !): Directly by inserting a solderedwire strap or by inserting a 100 Ohm, 0.5 W resistor between the soldering posts (R19) provided for thepurpose on G3HR. A resistor should be used instead of a wire strap above all when ground loops carryinghigh currents are to be expected between the NSD 70D and the DCE. It serves as a "fuse" and preventsdamage to the signal lead.If the connecting cable is a screened cable, the shield may only be grounded at one end (at the transmitterend as recommended in the relevant standards). This prevents the shield from being damaged by groundloops between the NSD 70D and the DCE carrying high currents.The "SHIELD" lead of the external cables connected to G3HR (V9MG, V9MH, V9MI and V9MK) is directlyconnected to the frame ground, it does not enter the equipment.

NSD 70D



7.2.3 F.O. interface G3HSBlock diagram:

BA70DD36.DRW

MASTER/SLAVE

T-INP0 3a

T-OUT1 5a

T-OUT2 6a

T-OUT0 4a

DR

FSR

CLKR

11a

10a

9a

T-INP2

T-INP1

8a

7a

CLKX

11c

f1

f2

FPGA

CPLOC4096

DATA TX64

DATA RX64

RX FAIL

"H" = MASTER"L" = SLAVE

"H" = High Power"L" = Low Power

SYNC

BER DETECTION

SYNC/PARITY

CLOCK-SELECTLOGIC

CPRX4096

Bit 18

Bit 18

Bit 7

RX_CLK64

TX_CLK64

Bit 6 8kHz Clock

8kHz8kHz

Bit 6

ORX

FSX

9c

DX

10cOTX

MCMI

NRZ

MCMI

NRZ

PLL

DEMUX

MUX

TRANSIT

NORMAL

CPRX2048

REM ERROR

SUPERVISIONTxDATA RxDATA

I-CLK 12a

S1.1

S1.2

SELECT_OPOW

S1.3

CLOCK4.096MHz

COMMON-AL 3cAlarm

AL TxDATA RxDATACLOCK4.9152MHz

TRANSIT / NORMAL

13a,c

14a,c

15/16a,c

+24V

+5V

At the transmit end the data signal (DX) is read with the aid of the 64 kHz clock information (CLKX) and the8 kHz word synchronisation (FSX) from the serial shift register of the DSP module. It is then time multiplexedand inserted by the multiplexer (MUX) into a 32 bit frame (Bit 18). The NRZ signal of the multiplexer, whichhas a baud rate of 2048 kBit/s, is now MCMI coded. This doubles the baud rate to 4096 kBit/s. The MCMIcoded signal is transferred to the optical transmitter, which is comprised of the modulation circuit, a currentsource and the transmission module.

At the receiver end the signal goes via the optical receiver module, the following amplifier with a built-in lowpass filter, the comparator and the MCMI / NRZ conversion to the demultiplexer (DEMUX). The demultiplexerextracts the 64 kBit data signal (Bit 18) and the 8 kHz word synchronisation (Bit 6) from the 32 bit frame. Thedata signal (DR) is now transferred, together with the word synchronisation (FSR) and the 64 kHz clockinformation (CLKR), via the switch over unit TRANSIT/NORMAL to the DSP module.

NSD 70D



7.3 Relay interface 1 G3HCBlock diagram:

Relay interface 1 type G3HC contains the DC isolated input and output circuits for communication with theprotection. The input circuits can be set for the two voltage ranges 48 VDC to 110 VDC (switches at approx.25 V) and 125 VDC to 250 VDC (switches at approx. 70 V). A correct transmission signal always comprisestwo anti-valent criteria, the TX_GUARD signal and the PTX tripping signal. This enables the processor on theDSP module G3HP to detect any failure of a single component (e.g. opto coupler short-circuit or mal-operation of an IC) and give alarm and thus prevent the transmission of an incorrect tripping signal.

Similarly, two anti-valent criteria are necessary when a tripping signal is being received, one of which is thediscontinuation of the guard signal RX_GUARD, the other being the presence of a correct tripping signalPRX. Providing both conditions are fulfilled, the semiconductor interface (RX TRIP) and the auxiliary relay(AUX) are activated and the corresponding output contact closes. A timer with settings of 5, 20 or 100 ms forprolonging the command ensures a steady output signal, even if there are short interruptions of the signalbeing received. To maintain the security of the unit in the event of the failure of a single component, the re-ceiver channel also includes a single component failure monitor. This picks up if only one of the criteria isfulfilled for longer than 3 seconds and blocks the main and auxiliary command outputs until a permissiblerelationship between the criteria is re-established.

To protect the auxiliary contact from damage due to excessively high making currents or capacitive cabledischarge currents, there is a resistor mounted on soldering posts in series with the contact. The main outputis equipped with an overvoltage and reverse polarity protection and an internal current limiter (see section10.3).

2s

delay holdALARM

+5V

"TX""RX"

COMMON ALARM

PRX

RX_GUARD

TX_GUARD

PTX

TX_CNTR

R3720ms

100ms

CC

CD

CE

R 58

K1 k1

K2 k2 CK

CA

CB

INTERFACE 1 (G3HC)

SINGLE COMP.FAILURE MON

20a,b,c

19a,b,c

24a,b,c

23a,b,c

32a,b,c

31a,b,c

27a,b,c

28a,b,c

3c

12a

6a

1c

1a

3a

5c

BA70DD11.DRW

TX TRIP

RX TRIP

AUX

ALARMCJ

R55

TRIPEXTENS

8a RX_CNTR

ICLK

< 2s

&

&

&

&

&

&

&

NSD 70D



Alarms originating from the various monitors are signalled by the red LED "AL" on the frontplate which is thecommon alarm for the assembly and relayed via the connection COMMON ALARM to the DSP module. Anauxiliary alarm relay, which can be selected to have either a N/O or N/C contact and has an adjustable pick-up time, signals the common alarm externally. A common alarm can also be signaled originating from othermoduls to the relais interface. Even though the relais interface has no fault on itself.

Received or transmitted commands are signalled by separate green LED's.

7.4 Relay interface 2 G3HDBlock diagram:

Relay interface 2 type G3HD contains the DC isolated input and output circuits for communication with theprotection. The input circuits can be set for the two voltage ranges 48 VDC to 110 VDC (switches at approx.25 V) and 125 VDC to 250 VDC (switches at approx. 70 V). A correct transmission signal always comprisestwo anti-valent criteria, the TX_GUARD signal and the PTX tripping signal. This enables the processor on theDSP module G3HP to detect any failure of a single component (e.g. opto coupler short-circuit or mal-operation of an IC) and give alarm and thus prevent the transmission of an incorrect tripping signal.

Similarly, two anti-valent criteria are necessary when a tripping signal is being received, one of which is thediscontinuation of the guard signal RX_GUARD, the other being the presence of a correct command PRX.Providing both conditions are fulfilled, relay K1 (RX TRIP) and the auxiliary relay K3 (AUX) are activated andthe corresponding output contacts operated. A timer with settings of 20, 50 or 200 ms for prolonging thecommand ensures a steady output signal, even if there are short interruptions of the signal being received.

1

2s

delay holdALARM

+5V

"TX""RX"

COMMON ALARM

RX_GUARD

TX_GUARD

PTX

TX_CNTR

1

TRIPEXTENS

R37

R58

K1

K2 k2

R79

CACB

R78

K3k3

k1

INTERFACE 2 (G3HD)

50ms200ms


27a,b,c

28a,b,c

19a,b,c

20a,b,c

3c

6a

1c

5c

3a

1a

23a,b,c

24a,b,c

31a,b,c

32a,b,c

<2s

BA70DD12.DRW

TX TRIP

RX TRIP

AUX

ALARM

CICH

CGCF

CKCJ

CC

CD

CE

PRX

8a RX_CNTR &

&

&

&

&

NSD 70D



To maintain the security of the unit in the event of the failure of a single component, the receiver channel alsoincludes a single component failure monitor. This picks up if only one of the criteria is fulfilled for longer than3 seconds and blocks the main and auxiliary command outputs until a permissible relationship between thecriteria is re-established.

To protect the main and auxiliary contact from damage due to excessively high making currents or capacitivecable discharge currents, there is a resistor mounted on soldering posts in series with the contact (seesection 10.4).

Alarms originating from the various monitors are signalled by the red LED "AL" on the frontplate which is thecommon alarm for the assembly and relayed via the connection COMMON ALARM to the DSP module. Anauxiliary alarm relay, which can be selected to have either a N/O or N/C contact and has an adjustable pick-up time, signals the common alarm externally. A common alarm can also be signaled originating from othermoduls to the relais interface. Even though the relais interface has no fault on itself.

Received or transmitted commands are indicated by separate green LED's.

7.5 Alarm interface G3HEBlock diagram:

delay ALARM

hold delay

K1 K2

K3 K4

COMMON ALARM

UNBLOCKING

EDEC

EAEB

<10s

<200ms <40ms

6c 7c 13a,c 15a,c

23a,b,c

24a,b,c

19a,b,c

20a,b,c

31a,b,c

32a,b,c

27a,b,c

28a,b,c

3c

5aUNBLOCKING 1

UNBLOCKING 2

ALARM 1

ALARM 2

SUPPLY MON. +24V 0V

+5V

0V

ALARM INTERFACE (G3HE)

EFEE

14a,c

15a,c

16a,c

BA70DD13.DRW

k4

k3

R 60

R 59

R 48 R 49k2

k1

The alarm interface includes a 24 V / 5 V switching regulator, various voltage monitoring circuits, two alarmcontacts and two unblocking outputs.

The alarm relays are normally energized and reset in the event of an alarm due to a reduction in the +24 V or5 V supplies or the generation of a COMMON ALARM. A pick-up delay of either 80 ms to 10 s can beselected on a DIL switch. The reset delay is 2.5 seconds.

The unblocking outputs have an adjustable pick-up delay and adjustable latching time. The times are set byappropriate choice of resistors mounted on soldering posts. The pre-set values do not normally have to bechanged. The duration of the unblocking impulse set in the works is approx. 200 ms.

To protect the unblocking contacts from damage due to excessively high making currents or capacitive cabledischarge currents, there is a resistor mounted on soldering posts in series with each contact (see section10.5).

NSD 70D



7.6 Trip counter G3HFBlock diagram:

This is an optional unit, which enables the number of commands transmitted and received (signal A/B orsignal D/E) to be counted. The respective counts can be read from the 7 segment LED display on the front-plate. In the event of a failure of the power supply, the counters are buffered by a capacitor and a lithiumbattery, so that the counts remain intact, but are not displayed. The lithium battery has sufficient capacity forat least 500 hours. The capacitor can maintain the counts for about 10 minutes to cover short periods whenthe battery is removed or switched off.

7 SegmDecoderMUX

TX A

TX B

7 SegmDecoderMUX

RX A

RX BRESET

TRIP COUNTER (G3HF)

BCDCOUNTER

BCDCOUNTER

BCDCOUNTER

BCDCOUNTER

5V

Ubat

3.2V

f1

f2

12a

9a

10a

4a

5a

ICLK

TX CNTR A

TX CNTR B

DISPLAYA / B ( D / E )RX-CNTRA

RX-CNTRB

BA70DD14.DRW

FBFA

NSD 70D

Utility Communication Systems Applications


PART 2 APPLICATION AND SETTING INSTRUCTIONS

8. APPLICATIONS

NSD 70D can transmit permissive and direct transfer tripping signals, blocking signals and continuous trip-ping signals via multiplexers which are equipped with the corresponding data interfaces. Some typicalapplications are described below with suggestions for parameter settings.

8.1 Permissive tripping schemesPermissive transfer tripping is used typically for the protection of transmission lines. The transfer tripping linkbetween the protection equipment at the ends of the line ensures that all faults can be cleared in the time ofthe first zone along 100 % of the line.In a permissive scheme, the transfer tripping signal from the NSD 70D is connected in series with a localcriterion (protection starting, directional decision or phase selection) and tripping can only take place at thereceiving end, if a transfer tripping signal is being received and the local protection relay detects a fault in thedirection of the protected line. The reception of a spurious tripping signal caused by interference on thecommunications channel cannot therefore give rise on its own to unwanted tripping. On the other hand, adelayed transfer tripping signal may mean that a fault on the line is tripped in zone 2 time instead of unde-layed in zone 1.High dependability and a short transmission time therefore take priority over high security in a permissivescheme.

Typical requirements are transmission times of less than 20 ms and false signal rates under worst-case inter-ference conditions of less than 10-3 (underreaching schemes) respectively 10-4 (overreaching schemes).Taking these constraints into account, the shorter evaluation time may be chosen for the NSD 70D. The relayinterface to be used in this case is the type G3HC. The following typical settings result:

Transmission time: T01 (< 3 ms)Interface type: G3HCCommand prolongation: 20 ms

The corresponding switch positions and further programming instructions are to be found in Section 10.

8.2 Direct transfer trippingTypical applications for direct transfer tripping are breaker back-up protection, compensator protection andpower transformer protection; line protection with direct transfer tripping would be an exception. The require-ments with respect to transmission time are generally not too demanding for direct transfer tripping.

In the case of direct transfer tripping, the tripping command from the teleprotection equipment goes directly tothe circuit-breaker tripping coil. Thus a spurious tripping signal resulting either from interference or humanerror will cause unwanted, usually three-phase tripping of the line and will block the operation of any auto-reclosure relay. For this reason, a spurious tripping signal should be avoided at all costs.

NSD 70D



A genuine transfer tripping signal, on the other hand, must on no account be lost whether there is interfer-ence on the communications channel or not, because then a line fault would not be isolated with corre-spondingly serious consequences.Extremely high security and high dependability are therefore more important than transmission time for directtransfer tripping.Transmission times of 30 to 50 ms are generally sufficient for direct transfer tripping. The NSD 70D fulfils therequired standard of security when the evaluation time is set to T02.

Transmission time: T02 (< 6 ms)Interface type: G3HC or G3HDCommand prolongation: at least 100 msCommand outputs: set to the quiescent state in case of an alarm


8.3 Blocking schemesIn a blocking scheme no tripping signals are transmitted along the faulted line. Instead the blocking schemesof all the surrounding healthy lines transmit signals to their remote ends to prevent tripping of the over-reaching relays there.The protection equipment of a blocking scheme usually consists of distance relays with overreaching firstzones measuring into the line and reverse-looking directional units. A through-fault is seen by the directionalunit which sends a signal to block the distance relay on the healthy line behind it. For a fault on the line, thereverse-looking directional units at the two ends do not send blocking signals and the overreaching firstzones trip their respective circuit-breakers.A teleprotection equipment for a blocking scheme has to fulfil only modest requirements. An incorrect signal(fault on the protected line) cannot prevent tripping, but only delay it. The loss or appreciable delay of theblocking signal for a fault in the overreach section of an adjacent line will, however, cause false tripping of theprotected line.Since the overreaching first zones of the relays have to be delayed sufficiently long to allow time for ablocking signal to be received, a short transmission time for the blocking signal is essential.It follows from these considerations that a short transmission time and good dependability are more importantthan security.The following configuration and settings are recommended for a blocking line protection scheme:

Transmission time: T01 (< 3 ms)Relay interface: G3HCCommand prolongation: minimum value (5 ms)


NSD 70D



8.4 UnblockingThe alarm module type G3HE is equipped with two potential-free unblocking contacts.If a protection signal has a high bit error content as the consequence of a line or equipment fault, it may notbe possible to transmit a tripping signal of adequate quality. In the absence of a transfer tripping signal, adistance relay would only trip in its second time step. The purpose of the unblocking function is to avoid thisdelay. It does so by closing the unblocking contacts of the NSD 70D for 200 ms in the event of a loss ofreceiver signal, i.e. when the NSD 70D is receiving neither guard nor tripping signals. This "emergency"feature can be used in different ways:

- to switch the reach of the distance relay (under- / overreaching first zone).- as an enabling signal of limited duration. This is used above all in the case of permissive overreaching

schemes.

8.5 Applications with two to six commandsWhere an NSD 70D is equipped for several commands, the evaluation time can be set separately for each ofthem.The up to 6 commands can be used for different applications (i.e. signals A and B for a permissive schemeand D and E for direct transfer tripping).

NSD 70D



8.6 Protection of Teed lines8.6.1 Normal T-operationA signal transmitted by one of the stations on a line having one or several teed terminals must be received byall the others. The NSD 70D system enables this to be achieved without every terminal station having to havean individual connection to every other station. The diagram below shows the arrangement for a line withthree terminals.Standard NSD 70D's are installed in the three stations A, B and T, but while in stations A and B only one unitis required, two NSD 70D's in a single rack type G7BGa are installed in the teed station. Corresponding set-tings on the programming switches in the teed station switch the signals from the receiver through to its owntransmitter. The settings for relaying the data signal are made on the backplate of the rack and on the datainterfaces. The command inputs and outputs of the two NSD 70D's have to be connected in parallel at theisolating terminals.The nominal transmission time from station A to station B won’t be negligible changed by the T-operation.(NSD 70D channel delay = due to conversion from digital to the format of the data interface in use andreverse. This time is very short (<<1ms) and can be neglected).

In the quiescent state, only the two outer stations A and B transmit guard signals which are both loopedthrough and simultaneously evaluated in the teed station. The same applies to a command originating fromeither A or B. A command originating at T is transmitted by the two transmitters to terminals A and B. Thecommands sent by T are received at A and B instead of the guard signals from the opposite end of the line.

When a command is received in the station T and a local command (TX) is active at the same time thecombined tripping signal will be generated and transferred to the opposite station.

A loop test may be initiated at any of the stations. The test signal is relayed through all the stations on the lineand thus tests the complete system.

TX

RX

TX

RX

TX RX TXRX

TX

RX

TX RX

TX

RX

A

T

B

Device 1 Device 2

Rack G7BG

BA70DE15.DRW

NSD 70D



8.6.2 Inverse T-operationInverse T-operation is used on a line with one or several teed terminals protected by a permissive over-reaching transfer tripping scheme. A terminal on the system can only issue a tripping command, if thecommand is received simultaneously from all the other terminals as well (logical "AND" connection).The incoming data is evaluated in the teed station in the same way as for point-to-point operation. Data canonly be looped (RX → TX) through the teed station when one of its command inputs is activated. The localcommands are therefore not transmitted to the other stations, but only cause the data to be looped throughthe teed station. No provision is made for looping specific commands individually. Providing one of thecommands (A...F) in the teed station is active, all the tripping commands from station A are relayed to stationB and vice versa.

Example:

Both station A and station B transmit a guard signal to the teed station in the quiescent state. In contrast tothe normal T-operation, the guard signals are evaluated locally and not relayed to station B respectively A.The transmitter signal is generated locally in the teed station. A command transmitted by station A isevaluated in the teed station, where the command outputs of the two NSD 70's are connected in series(logical "AND" connection). The command is only relayed to station B, if the protection relay in the teedstation also detects a fault on the line and itself generates a tripping command. The incoming data are thenrelayed to station B directly. Thus both A and T must individually generate a tripping command before atripping signal is transmitted to station B.This scheme does only make sense with one command per station, since signals cannot be relayed selec-tively.

8.7 AddressingProvision is made by means of programming switches for individually addressing teleprotection devices fromfirmware release 1.2.00 onwards. The data transmitted from station A can only generate a tripping commandin station B, if station B's address is contained in the incoming signal. The address and the local alarmsignals are transmitted to the remote station where they are continuously evaluated. This coded informationis contained in both trip and guard signals. The time taken to recognize an address lies within the time takento detect a tripping signal with programmed evaluation time Tev2. This can prevent false tripping, if forexample channels of the data circuit-terminating equipment are switched during the transmission of acontinuos command and the tripping signal is relayed to another station.

The command outputs are immediately switched to their programmed alarm states should a wrong addressbe detected (within Tev2). This can also occur should addresses be corrupted by bit errors. The followingprogramming is therefore recommended for the alarm states of the command outputs:

- In applications with continuous commands, the outputs should be programmed to retain the states theyhad prior to the alarm to avoid unwanted interruptions of commands.

- For short time tripping commands, programming the command outputs to adopt their quiescent statesin case of an alarm is recommended.

The LED’s on the frontplate indicate the corresponding state of the incoming signal (GUARD / TRIP)regardless of any addressing error. The internal trip counters can only record a command, if the programmingof the command output states for the event of an alarm permits the command to be transferred to theinterfaces.

NSD 70D



Programming addresses:

For point-to-point links, the local address must be the same as the remote address at the opposite end of theline. The remote address is included in the outgoing signal and compared with the local address by thereceiver. The address of the station for which the signal is intended thus forms part of the signal transmitted.

The programming is somewhat special in teed stations. In normal T-operation (Section 8.6.1), the incomingsignal is relayed through the teed station as long as no local command is being activated, i.e. the address inthe incoming signal is also relayed unchanged. Should the protection in the teed station trip, the trippingsignal is generated locally and has to be transmitted to the other stations with the same address informationthan previously.In inverse T-operation (Section 8.6.2), the outgoing signal in the teed station is generated locally in thequiescent state and in case a local command is being activated the incoming signal is relayed to the otherstations.Thus in the teed station both the local and remote addresses applied to the DSP module are identical with theaddress in the incoming signal.

Addressing example:

TX

RX

TX

RX

TX TXRX

TX

RX

TX RX

TX

RX

A

T

B

Device 2

Rack G7BG

BA70DE23.DRW

Device 1

Local address: 15Remote address: 23


RX



NSD 70D

Utility Communication Systems Equipment settings


9. EQUIPMENT SETTINGS

From a communications point of view the main parameters of consequence are:

- operating mode of the data interface- security and dependability

For the protection the main parameters of consequence are:

- transmission time- command prolongation (trip extension)- statuses of the command outputs in the event of an alarm- adaptation of the command inputs to suit the battery voltage

The corresponding programming instructions are to be found in Section 10.

9.1 Command transmission timeIt follows from Section 6.1 that there are two transmission time settings T01 and T02 for each command,corresponding to the internal signal evaluation times Tev1 and Tev2. Since a longer transmission timeenhances signal reliability with respect to mal-operation, the transmission time should not be chosen shorterthan really required for the application.

Remarks on transmission time

The nominal transmission time T0 is the time which elapses from the instant a signal is applied to the input ofthe teleprotection transmitter until it appears at the output of the teleprotection receiver. The measurement iscarried out with the transmitter and receiver connected back-to-back and there is no interference on thechannel.The nominal transmission time T0 comprises three terms:

T0 = TI/O + Tg + Tev

TI/O switching times of the relay interfaces at transmitting and receiving ends, e.g. TI/O is approx. 1 ms forinterface type G3HC or approx. 8 ms for G3HD.

Tg NSD 70D channel delay (due to conversion from digital to the format of the data interface in use). Thistime is negligibly short.

Tev Signal evaluation time in the NSD 70D receiver. This can be set in two steps for each of the maximumof 6 tripping signals.

In order to estimate the actual transmission time Tac in practice, the delay introduced by the communicationschannel (multiplexer, cable, microwave) must be added to the nominal transmission time. An additional delayof a few milliseconds can be caused sporadically by severe disturbance (bit errors) on the channel.

NSD 70D

Utility Communication Systems Equipment settings


9.2 Security and dependabilityBy security is understood the property of the receiver not to generate spurious tripping signals in the pres-ence of interference on the communications channel. Dependability characterises the receivers ability torecognize a genuine tripping signal within a given time in spite of interference on the communications chan-nel. It is obvious that to demand maximum security at the same time as maximum dependability is contra-dictory and one can only be increased at the expense of the other. In the following table, security is ex-pressed as the "worst case" false signal rate (Puc) for bit error blocks of 200 ms duration. "Worst case" is de-fined as the level of interference at which the guard signal is completely suppressed. The worst case corre-sponds to a bit error rate of 0.5. Dependability is expressed as the bit error rate BER, for which the nominaltransmission time is scarcely exceeded.

Nominal Security Dependabilitytransmission time Puc (BER = 0.5 for 200 ms) Pmc < 1 %

T01 < 3 ms < 10-6 (200 ms) BER < 10-3

T02 < 6 ms < 10-28 (200 ms) BER < 5*10-5

The measuring procedures are described in Appendix E.

9.3 Statuses of the command outputs during an alarmThe response of the command outputs to a loss of RX synchronisation, the detection of AIS, an excessive biterror rate or an address error can be set by the user on programming switches. The following settings arepossible:

- The command outputs are set to their quiescent states (= no command).- The command outputs are set to their tripped states.- The command outputs correspond to the current status of tripping signal processing, i.e. they do not

respond at all to the alarms (default setting).- The command outputs retain the statuses they had immediately prior to the alarm.

Where 2 to 6 commands are in use, the setting applies to all of them.

Refer to Section 8.7 "Addressing", if the addressing function is activated.

NSD 70D

Utility Communication Systems Programming


10. PROGRAMMING

The operating parameters of the teleprotection equipment NSD 70D are set primarily using the 4 program-ming switches on the DSP module type G3HP. None of the settings on this unit require soldering.

The default settings on the relay interfaces do not require soldering either. Components only need to be re-placed, if special command prolongation times, unblocking times or current limiting resistors are specified.

10.1 DSP module type G3HPProgramming the 4 DIL switches S4 to S7 on the DSP module.The crosses [ x] indicate the default or works settings.

S4

ON OFF

[ x] (8) \ alarm latching statuses of the command outputs [ x] (7) / at BER-/SYN- or address error alarm (see table) [ x] (6) T-operation ON / OFF [x ] (5) cyclic loop test ON / OFF [ x] (4) remote alarm state monitoring ON / OFF [ x] (3) continuous trip monitoring (ON: alarm for command duration > 2.5 s) [ x] (2) local test mode (ON: command inputs looped to the outputs) [ x] (1) inverse T-operation ON /OFF (firmware release 1.2.00 onwards)

S5

ON OFF

[ x] (8) \ ON = 25 = 32 \ Remote station address = sum of ON values [ x] (7) / ON = 26 = 64 / (default = 00; firmware rel. 1.4.00 onwards) [x ] (6) Tev trip F [4 ms / 1 ms] (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N80]2)

[x ] (5) Tev trip E [4 ms / 1 ms] (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N74]2)

[x ] (4) Tev trip D [4 ms / 1 ms] (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N68]2)

[x ] (3) Tev trip C [4 ms / 1 ms] (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N46]2) [N80]3)

[x ] (2) Tev trip B [4 ms / 1 ms] (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N40]2) [N74]3)

[x ] (1) Tev trip A [4 ms / 1 ms] (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N34]2) [N68]3)

1) The times stated for T0 apply when using relay interface type G3HC. The times are about 5...8 ms longer with the interface typeG3HD.The auxiliary output (AUX) on interface type G3HC can cause an additional delay of up to 2.5 ms in relation to the main commandoutput.When using the interface G3HR with programmed transmission rate of 56 kBit/s, maximum 1 ms longer times for T0 to occur, i.e.(ON: T0 < 7 ms; OFF: T0 < 4 ms).

2) [N..] is the designation of the slot in the rack.3) Slot for a second device in the same rack.

NSD 70D



S6

ON OFF

[ x] (8) \ ON = 20 = 1 \ [ x] (7) | ON = 21 = 2 | Local station address [ x] (6) | ON = 22 = 4 | = sum of ON values [ x] (5) | ON = 23 = 8 | (default = 00; firmware rel. 1.2.00 onwards) [ x] (4) / ON = 24 = 16 / [ x] (3) ON / OFF Device addressing (firmware rel. 1.2.00 onwards) [ x] (2) \ ON = 25 = 32 \ Local station address = sum of ON values [ x] (1) / ON = 26 = 64 / (default = 00; firmware rel. 1.4.00 onwards)

S7

ON OFF

[ x] (8) \ ON = 20 = 1 \ [ x] (7) | ON = 21 = 2 | Remote station address [ x] (6) | ON = 22 = 4 | = sum of ON values [ x] (5) | ON = 23 = 8 | (default = 00; firmware rel. 1.2.00 onwards) [ x] (4) / ON = 24 = 16 / [x ] (3) \ Alarm threshold setting = [x ] (2) | permissible bit error rate (BER) [ x] (1) / before alarm is given (see Table)

Supplementary information and tables on switch positions:

• 0 = OFF, 1 = ON

• AddressingThe local and remote address are binary settings. Possible addresses: 0...127.

• Alarm pick-up levelsThe exponential for the maximum permissible bit error rate is set in a range of 1E-03 to 1E-06 usingswitches S7 (1)..(3) (see table below). The setting can be checked by pressing the key [SNR] on thepocket terminal or with the aid of a PC.

S7(1) S7(2) S7(3) BEROFF ON ON 1E-03ON OFF OFF 1E-04ON OFF ON 1E-05ON ON OFF 1E-06

• T-operation:In the inverse T-operation mode, switches S4 (1) and (6) must be set to ON.

NSD 70D



• Alarm latching S4(7-8)

S4(7)=0 S4(8)=0 → Command outputs do not respond to an alarm.S4(7)=0 S4(8)=1 → * Command outputs set to the quiescent state.S4(7)=1 S4(8)=1 → Command outputs set to the tripped state.S4(7)=1 S4(8)=0 → Command outputs retain the statuses prior to the alarm.

* recommended for direct transfer tripping

10.2 Data interface10.2.1 PCM interface type G3HMDefault settings are in bold print.

Operating mode:

Jumper plug Mode

MA → CodirectionalMB → Contradirectional

MC → TransitMD → Normal operating mode

10.2.2 RS-422-interface type G3HRThe default settings are marked with a [X].

Operating mode:

Setting switch S1ON OFF

Not used (8) [ ] [X]Terminal timing (TT) to DCE ON / OFF (7) [ ] [X]TT clock synchronisation ON: on RX data / OFF: none (6) [ ] [X]Receive clock synchronisation ON: on RX data / OFF: none (5) [ ] [X]Transit relaying ON / OFF (4) [ ] [X]Internal clock frequency ON: 56 kHz; OFF: 64 kHz (3) [ ] [X]Receive clock ON: internal; OFF: external (RT) (2) [ ] [X]Transmit clock ON: internal; OFF: external (ST) (1) [ ] [X]

NSD 70D



Setting the cable termination resistance:

Default settings are in bold print.

Signal Input Abbreviation Solder Bridge Impedance

Receive Data RD SY1 = OFF ≥≥≥≥ 4 kOhmSY1 = ON 100 Ohm

Receive Timing RT SY2 = OFF ≥≥≥≥ 4 kOhmSY2 = ON 100 Ohm

Send Timing ST SY3 = OFF ≥≥≥≥ 4 kOhmSY3 = ON 100 Ohm

ON → The two solder pads SY. are connected with solder.OFF → The two solder pads SY. are not connected.

Grounding arrangement:

Default settings are in bold print.

All signals DC isolated R19 = ∞∞∞∞ (not fitted)Signal ground connected to frame ground R19 = 0 Ohm (wire strap)Signal ground connected to frame ground via R19 = 100 Ohm, 0.5 W

10.2.3 F.O. interface type G3HSThe default settings are marked with a [X].

Operating mode:

Switch setting S1 S1ON OFF

Not used (8) [ ] [X]Not used (7) [ ] [X]Not used (6) [ ] [X]Not used (5) [ ] [X]Not used (4) [ ] [X]Optical transmission power 1) ON: maximum / OFF: reduced (3) [X] [ ]Operating mode 2) ON: master / OFF: slave (2) [X] [ ]Transit relaying ON / OFF (1) [ ] [X]

1) Transmission power reduction is only possible with the G3HS up to 30 km. The transmission power reduction should beswitched on when the transmitting distance is less than 8 km. For the G3HS up to 5 km switch S1(3) must always be ON!

2) Programming the operating mode depends on the application. If the NSD 70D is connected to a multiplexer then themodule must be operated in slave mode. The receive and transmit timing signals are synchronised to the receptionfrequency (of the multiplexer). With a NSD 70D <=> NSD 70D link one terminal must be programmed as master and theother as slave. Within a network with T-stations (without multiplexers) one NSD 70D must be programmed as master andall other NSD 70D's as slaves.

NSD 70D



10.3 Relay interface 1 type G3HCDefault settings are in bold print.

Setting table for the jumper plugs:

Jumper plug

CA input voltage 125 VDC...250 VDCCB input voltage 48 VDC...110 VDC

CC*/CD/CE command prolongation 5 ms / 20 ms / 100 ms

CJ/CK alarm contact in alarm state open (N/O) / closed (N/C)

Command prolongation: Th = 0.6 * R37 R37 = Th * 1.7* (only variable with jumper (R in kOhm, T in ms) in position CC)

Default setting Th = 5 ms R37 = 8.2 kOhm

Alarm delay: TV = 2.5 * R58 + 10 ms R58 = (TV - 10 ms) * 0.4(R in kOhm, T in ms)

Default setting TV = 2 s R58 = 820 kOhm

Protective resistor R55:

The series resistor R55 prevents the auxiliary output contact from being overloaded due to charging or dis-charging of cable capacitances. It may be reduced in proportion to the voltage Uk at the terminals. A ordinary1 Watt resistor can be used.

R55 ≥ Uk/2 (R55 in Ohms, Uk in Volts)

Default setting R55 = 150 Ohm

NSD 70D



10.4 Relay interface 2 type G3HDDefault settings are in bold print.

Setting table for the jumper plugs:

Jumper plug

CA input voltage 125 VDC...250 VDCCB input voltage 48 VDC...110 VDC

CC*/CD/CE command prolongation 20ms / 50ms / 200ms

CF/CG trip output N/O contact / N/C contactCH/CI aux. output N/O contact / N/C contactCJ/CK alarm contact in alarm state open (N/O) / closed (N/C)

Command prolongation: Th = 0.6 * R37 + 3 ms R37 = (Th - 3 ms) * 1.7* (only variable with jumper (R in kOhm, T in ms) in position CC)

Default setting Th = 20 ms R37 = 27.0 kOhm

Alarm delay: TV = 2.5 * R58 + 10 ms R58 = (TV - 10 ms) * 0.4(R in kOhm, T in ms)

Default setting TV = 2 s R58 = 820 kOhm

Protective resistors for the relay contacts:

The positions for the series resistors R78 and R79 are normally shorted (0 Ohm), because the relays oninterface 2 are equipped with heavy-duty contacts (max. peak making current several 10 A).

NSD 70D



10.5 Alarm interface type G3HEDefault settings are in bold print.

Alarm time delay:

Switch Time delayS1(2) S1(3) S1(4)

OFF OFF OFF 0.08 sOFF OFF ON 0.16 sOFF ON OFF 0.31 sOFF ON ON 0.63 sON OFF OFF 1.25 sON OFF ON 2.50 sON ON OFF 5 sON ON ON 10 s

Alarm outputs:

Jumper plug Alarm output

EA / EB Alarm 1: contact in alarm state open (N/O) / closed (N/C)EC / ED Alarm 2: contact in alarm state open (N/O) / closed (N/C)

Unblocking outputs:

Pick-up delay 1): TvU = 0.23 * R49 (TvU < 40 ms !) R49 = TvU * 0.43Default setting TvU = 10 ms R49 = 47.0 kOhm

Pulse duration: ThU = 0.42 * R48 + 50 2) - TvU R48 = (ThU - 50 + TvU) * 2.4Default setting ThU = 200 ms R48 = 390 kOhm

(ThU, TvU in ms; R48, R49 in kOhm)

1) In addition to the signal loss detection time (depending on Tev)2) Allows for the driver impulse from G3HP.

Protective resistors R59 and R60:

The series resistors R59 and R60 prevent the unblocking output contacts from being overloaded due tocharging or discharging of cable capacitances. They may be reduced in proportion to the voltage Uk at theterminals. Ordinary 1 Watt resistors can be used.

R59, R60 → Uk/2 (R59, R60 in Ohms, Uk in Volts)

Default setting R59, R60 = 150 Ohm

NSD 70D



Power supply monitor:

Jumper plug Voltage monitor

EF Monitor for the single supply unit in slot N1EE Monitor for the two supply units in slots N1 and N9

EF Monitor for the single supply unit in slot N9(G3HE in slot N62, see Section 10.7)

10.6 Trip counter type G3HFDefault settings are in bold print.

Buffer battery:

Jumper plug Buffer battery

FA battery in circuitFB battery out of circuit (storage)

10.7 Rack G7BGaAlternative supplies: Redundant supply

The two power supply units can be connected in parallel by inserting thejumper plug WA. Since a single supply unit can supply a complete rack, aredundant supply is thus possible.

Separate supplies for left and right half racks

When jumper plug WY is inserted, the right half of the rack is supplied bysupply unit 1 (and supply unit 2 in the case of redundant supplies).Jumper plug WD must be inserted, where it is desired that the left and righthalf racks should be supplied independently by supply units 1 and 2 respec-tively. Jumper plug WBC connects the SUPPLY MON 2 and SUPPLYMON 1 signals together, so that the SUPPLY MON 2 signal is monitored bythe alarm interface for the right half of the rack.

Power supply supervision: To ensure that the power supply for the second equipment is properly mon-itored, the SUPPLY MON 1 and SUPPLY MON 2 signals must be con-nected to the right half of the rack by appropriately positioning the jumperplugs WB and WC or WBC.

NSD 70D



T-operation: The T-operation mode requires that the corresponding jumper plugs beinserted and the programming switch S4(6) on the DSP module set to "ON".Switch S4(1) must also be switched on for inverse T-operation.The command inputs and command outputs of the two units in the teed sta-tion must be connected in parallel.

1 NSD 70D 1 supply unit (N1) or WA, WM, WO, WQ, WS, WK, WL, WU,redundant units WV, WW, WX, WZ, WY, WB, WC

2 NSD 70D's 1 common supply unit (N1) or WA, WN, WP, WR, WT, WB, WC, WDredundant units

2 NSD 70D's 2 independent supply units, WN, WP, WR, WT, WBC, WDleft half rack SUPPLY UNIT 1right half rack SUPPLY UNIT 2

2 NSD 70D's T-operation WA, WE, WF, WG, WH, WI, WJ, WN1 common supply unit (N1) or WP, WR, WT, WD, WB, WCredundant units

NSD 70D

Utility Communication Systems Assembly and installation


PART 3 INSTALLATION, COMMISSIONING, OPERATION AND MAINTENANCE

11. ASSEMBLY AND INSTALLATION

DANGERThe equipment must be switched off during assemblyand installation. All the isolating terminals from theexternal cables must be kept open during assemblyand installation.

CautionESD


Caution Neither removing nor inserting of modules is permittedduring power-up of the equipment. Proceeding to plug inand out of modules the power supply of the equipmenthas to be switched OFF.

DANGER The units G3HC, G3HD and G3HE must not be used withPCB extenders!

Hazardous voltage. Beware of electric shock.

11.1 Precautions for avoiding transport damageThe plug-in units must be carefully but firmly screwed into the racks to prevent them from falling out.Separately packed modules and other loose parts must be properly secured and suitably packed to avoiddamage.

11.2 Mechanical InspectionThe equipment should be checked for mechanical damage as soon as possible after receipt. Should anydamage be found, the shipping agent should be notified in writing immediately. Please refer to our localcompany representative for further advice and assistance concerning the equipment.The equipment must neither be switched on nor any of the external connections made, respectively the iso-lating terminals must be open, while the modules are being inserted in the rack or the rack is being installed.For safety reasons, the screens on both the soldered and component sides of the alarm interface G3HE andthe relay interfaces G3HC and G3HD must be in place before connecting any of the external cables. The useof PCB extenders is not permitted with these units, because of the danger of contact with the stationbattery supply !

NSD 70D



11.3 Equipment roomThe room where the equipment is installed should be relatively free of dust. Cement floors and walls shouldbe sealed with a suitable paint. Wherever possible, the floor should have a semi-conducting plastic coating.The room should be well ventilated. Recommended ranges for temperature and humidity are +10 °C to+45 °C, respectively 30 % to 70 %. Lead/acid batteries must not be in the same room.

11.4 Connecting the cablesElectrical signalsThe connecting cables are inserted directly into the C connectors of the corresponding unit at the rear of theequipment rack.

Cable Module Slot Connector

V9LF G3HM N21, N55 X2, X8

V9LE G3HC, G3HD, G3HE N28, N34, N40, N46, X3, X4, X5, X6,N62, N68, N74, N80 X9, X10, X11, X12

V9MG G3HR, RS-422/X.21 N21, N55 X2, X8V9MH G3HR, RS-422/RS-530 N21, N55 X2, X8V9MI G3HR, RS-422/RS-449 N21, N55 X2, X8V9MK G3HR, RS-422/general N21, N55 X2, X8V9ML G3HR, RS-530/FOX-U N21, N55 X2, X8

DANGER A mixed up or a wrong connected cable can get damage.If the cable V9LE is connected to a connector X2 or X8then the interfaces G3HM and G3HR can be destroyed.

Length and type of cables

Cable V9LF (PCM interface):

A shielded cable with twisted pairs is recommended and a maximum length of 400 m should not beexceeded. Where strong electromagnetic interference is to be expected, cables with double shields shouldbe used and the maximum permissible length of cable is reduced to 100 m. CCITT recommendation G.703specifies twisted cores and a nominal symmetrical impedance of 120 Ohm per pair. Attenuation should notexceed 3 dB at 128 kHz with the shield grounded at only one end (grounding at both ends is permissible,providing no high equalising currents are likely to flow as a result of a potential difference between thegrounds of the NSD 70D and the multiplexer).

Cable V9MG,V9MH,V9MI,V9MK (RS-422-interface):

A shielded cable with twisted pairs is recommended and a maximum length of 1000 m should not beexceeded for a four-wire link (only data exchange between devices, no transmission of timing information).Where additional cores are conducting timing information for synchronous transmission, the maximumpermissible length of cable reduces to 500 m. The shield should be grounded at only one end (grounding atboth ends is permissible, providing no high equalising currents are likely to flow as a result of a potentialdifference between the grounds of the NSD 70D and the data circuit-terminating equipment.

NSD 70D



For longer distances and in the presence of strong electromagnetic interference, the data can be convertedto optical signals for transmission (RS-422 → optical ... optical → RS-422). Suitable modems are commer-cially available, but attention must be paid to compatibility of the connectors and pin assignment (see Section5.2).Providing there is sufficient space to the front of the equipment, an RS-530 → optical converter with a 25 pinSUB-D connector can be attached directly to the frontplate of the G3HR. In this case, the external cablesV9MG, V9MH, V9MI or V9MK are not needed. Please contact our local agent for more information.

Optical signals

The fibre optic (F.O.) cables are connected to the F.O. interface via the plug connectors on the front panel.

�Note: The fibre optic connection must be especially cleaned

before they can plugged in.

Caution The optical cable must be fixed together very carefullyto avoid damage. The ceramic sleeves are verysensitive. An improper application can take damage tothe FC/PC sleeves on the F.O. interfaces.

Cable Module Slot Fibre Distance Plugs

V9GB G3HS up to 5 km N21, N55 MM 5 km ST plugs at both endsV9GC G3HS up to 5 km N21, N55 MM 5 km 2 ST plugs and 2 FC/PC plugsV9LZ G3HS up to 5 km N21, N55 MM 5 km ST plugs at one end only

V9FZ G3HS up to 30 km N21, N55 SM 30 km FC/PC plugs at both endsV9GA G3HS up to 30 km N21, N55 SM 30 km FC/PC plugs at one end onlyV9GD G3HS up to 30 km N21, N55 MM 18 km FC/PC plugs at one end only

Cable length and type

The above mentioned F.O. cables may be ordered in lengths from 4 m up to 99 m. Default length is 4 m.

V9GB, V9GC and V9FZ, which are equipped ex works with plugs at both ends, serve to connect theteleprotection equipment to the communication equipment within the cabinet. For example, the V9GC canconnect a NSD 70D - which is equipped with the lower priced F.O. interface type "G3HS up to 5 km"(ST plugs) - directly to the corresponding optical interface of the FOX family (FC/PC plugs).The F.O. cables V9LZ, V9GA and V9GD lead the signals from the equipment to the splice box.The choice of the optical fibre depends upon the distance to be spanned. For the module type "G3HS up to30 km" 50/125 µm multimode (MM) fibres are sufficient up to a distance of 18 km. For distances up to 30 km10/125 µm singlemode (SM) fibres are necessary.For the module type "G3HS up to 5 km" 50/125 µm multimode (MM) fibres are used exclusively.The F.O. cables, which are normally equipped at one end only with the above mentioned plugs, can also bedelivered with customer specific plugs at the other end.

NSD 70D



Connections to the multiplexer FOX

The following table shows the different interfaces and modules to build a connection to the FOX multiplexerseries.

Interface Bit rate NSD 70Dmodule

FOX 6Plus moduleFOX/MUX 20 module

FOX-UFOX 515

connecting cable

V.11 / RS-422X.21

64 kBit/s G3HR N3BE SIFOX 381,SIFOX 382,UNIDA 433

V9ML

G.703 64 kBit/s G3HM N3BS GECOD 371,GECOD 372

optical 4 MBit/s G3HS N3BT N4BA OTERM V9FZ, V9GC 1)

1) Please note: FOX-devices need always a FC/PC connector. On the NSD 70D side it depends on the interface which connector (ST or FC/PC) is

used. See previous section.

Power supply

Caution The power supply voltage must correspond with therating label and the power supply unit.

DANGERThis is a Class I equipment as specified in IEC60950. The equipment and the cabinet must beearthed.

The NSD 70D can be equipped for 48 VDC (G3HI), 110 VDC (G3HH) or 230 VAC, 50 Hz (G3HG). Theconnections will be accordingly, either to a DC- or to an AC primary system. The input supply voltage mustcorrespond with the rating label and the power supply unit. The equipment and the cabinet must always beearthed. Every external power supply to the equipment must be short current and over current protected.

The NSD 70D must always be connected to a circuit breaker. In case of an redundant supply (two powersupplies), there must also be two circuit breakers.

Recommended circuit breaker:

B9AS Label E: CI-BREAK ≤ 60 VDC / 250 VACIdent. number: 1KHL015141R0001Type: S282 K6AMax. voltage: ≤ 60 VDC or ≤ 250 VAC

B9AV Label E: CI-BREAK > 60 VDC … 250 VDCIdent. number: 1KHL015999R0001Type: S282 UC-K 6AMax. voltage: ≤ 250 VDC

NSD 70D



supply voltage supply module circuit breakerB9AS B9AV

24 VDC G3HK (optional) X48 VDC G3HI X60 VDC G3HI X110 VDC G3HH X220 VDC G3HG X115 VAC G3HQ (optional) X230 VAC G3HG X

The power supply connections are made to the 6.3 mm FASTON terminals on the left side of the rack. Theconnectors beside the upper mark are for the power supply 1, beside the lower mark for power supply 2. Thepower supply variations are explained in section 10.7.

DC + Pos. terminal batteryDC - Neg. terminal battery

AC L Phase (L) on mains connectionAC N Neutral (N) on mains connection

PE Protective earth conductor

Symbol protective earth conductor

DANGER

Faston plugs on the cables connected to the rack must becovered with an isolation sleeve.Unused faston connectors have to be covered.

Cover for unused faston Ord. Nr: HESG455631P0001Isolation sleeve for faston Ord. Nr: NBT 402942P0008

N NAC

DC - -L LAC

DC + +

P OWERS UPPLY 1

PE

NSD 70D

Utility Communication Systems Testing and commissioning


12. TESTING AND COMMISSIONING

12.1 Safety instructions

DANGERIt is extremely important to follow the following safetyinstructions to avoid serious personnel injury ordamage to the equipment.

• The Operating Instructions should be read and clearly understood before performing re-programming, maintenance etc. and only an authorised and properly trained person is admittedto do the same.

• In order to avoid the risk of damage during transport the precautions laid down in section 11.1must be observed.

• Cubicles, which are not secured to the floor, tip forwards when the hinged frame is opened.• Mechanical safety facilities such as cover plates must not be removed or bypassed.• Precautions and indications to hazardous voltages must be strictly observed.• The power supply voltage must correspond with the rating label and the power supply unit.• Before switching ON for the first time, check for proper setting of jumpers and fuses. In addition

check the wiring of protective earth, power supply polarity and voltage.• Neither removing nor inserting of modules is permitted during power-up state of the equipment.

Preceding to plugging in and out of modules the power supply has to be switched off.• All circuit breaker must be opened in case of redundant power supply.• Dangerous station battery voltages may be present on the relay and alarm interfaces types

G3HC, G3HD and G3HE. For this reason, maintenance and commissioning may only beperformed by correspondingly trained personnel. The modules G3HC/D/E must not beoperated via extender cards, because of the danger of contact with the station batteryvoltage !

• The modules in this equipment contain CMOS devices, which can be damaged by electrostaticdischarges. Essential precautions to prevent ESD damage when handling or working onmodules are grounding straps for technical personnel and the provision of anti-static workbenches. Modules may only be shipped either in their original packing or installed in equipmentracks.

• Alteration of the equipment is not allowed.

The teleprotection equipment NSD 70D must be programmed in accordance with the ProgrammingInstructions given in Appendix F. It must be tested and commissioned in accordance with theinstructions given in Appendices G and H.

NSD 70D



12.2 Testing facilitiesTest sockets

There is a test socket each for the receiver and transmitter signals on the frontplate of the PCM interface.The receiver signal is available at the socket "Rx DATA" and the corresponding 8 kHz synchronisation signalat socket "Rx SYNC". The transmitter signal can be checked at the test sockets "Tx DATA" and "Tx SYNC".The signals at the test sockets on the PCM interface are at HC MOS level.

Frontplate signals

Three green LED's "RDY", "GRD" and "TRP" on the DSP module show the operating status of the unit andan alarm condition is signalled by the three red LED's "AL", "SYN" and "BER".Equipment settings and any alarms can be viewed by connecting the special "TELEPROTECTIONTERMINAL" or an XT/AT PC (e.g. with especially developed "PROTEC" PC software) to the serial interfaceprovided (see Section 13.1.1).

�Note: Is the NSD 70D correctly plugged to the mains

(Battery or AC) and only the LED on the power supplymodule is on, then the switches S1 and S2 on thebackplate (behind the cover but accessible from thetop) are off.

Loop test

When in operation, the unit can be tested with the aid of the loop test. The signal of this test has the samecharacteristics (security and dependability) as the NSD 70D tripping signals for a setting of T0 < 3 ms. Theloop test can be initiated either manually by pressing a button on the frontplate, or automatically every 6 hoursby an internal timer.

Local loop mode

The DSP module can be set to a local operating mode for checking the relay interfaces, e.g. for setting ormeasuring command prolongation. In this operating mode, which is indicated by the LED "AL" and via theserial interface by the alarm message "LOCAL TEST MODE", the command input signal is looped by theprocessor back to the command output of the local relay interface.A main switch is provided at the rear of the rack for each of the two NSD 70D devices. One unit can thus beswitched out of operation and the other left in.

NSD 70D



12.3 Pocket terminal

Pin connections

The pin connections for the 9 pin SUB-Dconnector are given as below:

Pin 1 -Pin 2 RXDPin 3 TXDPin 4 DTRPin 5 GNDPin 6 -Pin 7 RTSPin 8 -Pin 9 +5V

Power supply

The power supply of +5 VDC is derived from the DSPmodule G3HP.

TELEPROTECTIONTERMINAL

SHIFT

1 2 3 4 5

6 7 8 9 ERR

0SP<- ->WINDOW

SW FREQ BW TEV ALPHA

SNR LEV OT CHKS VERS

OPT1 OPT2 OPT3 OPT4 OPT5

LHm RHm

78mm

153mm

BA70C_15.DRW

SettingsThe pocket-terminal provides the potentiometer (to adjust the contrast) on the right side, next to the display.Following factory settings for the communication mode are stored in an EPROM (they are not changeable):

data rate: 1200 bauddata bits: 7parity: nonestop bits: 2

For more information please refer to the instruction manual which is delivered with the pocket-terminal.

NSD 70D

Utility Communication Systems Operation and maintenance


13. OPERATION AND MAINTENANCE

13.1 OperationDuring operation, the status of the equipment can be seen from the LED signals on the frontplates of the in-dividual modules, respectively by viewing messages via the serial interface on the DSP module.In the quiescent state only the LED's "RDY" and "GRD" on the DSP module are lit and checking for mes-sages via the serial interface produces the response "NO ALARM". An inadmissible operating condition issignalled by the red LED "AL" on the front of the unit concerned and the nature of the alarm can be queriedvia the serial interface.

�Note: Is the NSD 70D correctly plugged to the mains

(Battery or AC) and only the LED on the power supplymodule is on, then the switches S1 and S2 on thebackplate (behind the cover but accessible from thetop) are off.

13.1.1 Terminal messagesIn addition, the following information can be viewed using the pocket terminal "TELEPROTECTIONTERMINAL", a VT terminal or an XT/AT PC:

Key ASCII character Information

[ERR] A alarm messages[SHIFT] then [ERR] # alarm messages in the remote station[SW] G programming switch positions S4(1)....S7(8) in binary form[FREQ] H not used[BW] I data transfer rate of the interface in use[TEV] J measured actual command transmission time[ALPHA] K degree of security and dependability[SNR] L BER alarm threshold[LEV] M not used[OT] N time in operation since the last reset[CHKS] O PROM check sums[VERS] P copyright and firmware release[OPT1] Q measured actual bit error rate (from firmware rel. 1.3.00 onwards)[OPT2] R not used[OPT3] S not used[OPT4] T TX trip counter (from firmware rel. 1.1.00 onwards)[OPT5] U RX trip counter (from firmware rel. 1.1.00 onwards)

If a message ends with dots ... at the end of the displayed line, more information is available and can beviewed by pressing the calling key again.Operating the [ERR] key only presents one alarm at a time. If there are several alarms the [ERR] key must bepressed repeatedly until the first alarm appears again.When using a VT100 terminal to access equipment information, press the ASCII character given in the abovelist to view the corresponding message.

NSD 70D



13.1.2 Alarm messages and their causes

* CONTINUOUS TRIPContinuous trip monitor set and continuous trip present.

* REMOTE ALARM - < PRESS SHIFT ERR >There is an alarm in the remote station. The alarms in the remote station can be scrolled by repeatedlypressing first [SHIFT] and then [ERR].

* BIT ERROR RATE < 1E-0*The bit error rate of the signal being received has exceeded the permissible limit (1E-0*). The limit canbe programmed using the switches S7(1)...S7(3).

* SWITCH SETTING ERRORThe switch settings have changed since the last reset (e.g. faulty switch contact).

* COMMON ALARMAlarm contacts are, or are about to be closed.

* LOCAL TEST MODEIn the local test mode, the command inputs are looped directly to the command outputs. This testmode is only used to check the operation of the equipment according to 13.2.1 b).

* CYCLIC LOOP TEST FAILEDThe cyclic loop test is set. Alarm has been given after 8 consecutive unsuccessful tests (at intervals of5 minutes).

* RAM ERROROne of the two RAM components is defective and the DSP module G3HP must be replaced.

* CHECK SUM ERROROne of the two PROM components is defective and the DSP module G3HP must be replaced.

* TRANSMIT SYNC ERRORThere is no transmitter synchronisation signal (FSX) due to either failure of the quartz oscillator or amissing external clock signal.

* RECEIVE SYNC ERRORThere is no receiver synchronisation signal (FSR) due to either failure of the quartz oscillator or amissing external clock signal.

* AIS RECEIVEDAn Alarm Indication Signal is being received.

* MISSING ICLK SIGNAL OR UART (COM1) DEFECTInterface clock failure (defective quartz oscillator on the data interface) or defective COM1 serial inter-face. This alarm can only be checked from the remote station, because the local terminal interface nolonger functions.

* TX SINGLE COMPONENT ERRORSingle component error on a relay interface.

* EQUIPMENT ADDRESS FAILUREAddressing error. The incoming signal is not intended for the device.

* NO ALARM

NSD 70D



13.2 MaintenanceThe individual modules were subjected to a burn in test at the conclusion of manufacture followed by thor-ough functional testing. The parameters governing the operating characteristics are all determined by the DILswitches S4 to S7 on the DSP module and are thus not subject to ageing. The processor includes a numberof self-monitoring functions, which together with the loop test performed at periodic intervals, continuouslycheck the operation of the DSP module and the data interface and the availability of the communicationschannel as a whole. Nevertheless, it is recommended to test the equipment at regular intervals. The durationof such intervals depends very much on local conditions, but should not exceed two years.

13.2.1 Periodic testsa) Checks during operationThe ability of the equipment to function correctly can be checked manually by pressing the button "TST" onthe front of the DSP module type G3HP to initiate the loop test. Providing the signal transmitted for the test isreceived back again within the allotted time, the LED's "RDY", "TRP" and "GRD" light for about 3 s to confirmthat the test was successful. If not, the alarm signal "AL" lights for about 3 s instead of the LED "TRP".It is advisable to also check the alarms in the remote station as part of this test (press the keys [SHIFT] and[ERR] on the pocket terminal one after the other).Should the equipment fail the loop test in two consecutive attempts, it must be removed from service andchecked according to b) below.

Caution The "RESET" button on the DSP module G3HP mustnot be pressed while executing routine tests duringnormal operation, as this causes reinitialization of theNSD 70D and blocks it for about 5 seconds. Duringthis time no commands can be transmitted.

b) Removing the equipment from service for testing the relay interfaces

1. All circuit breaker must be opened in case of redundant power supply.2. Open all isolating terminals to the protection and then switch off the equipment.3. Check the buffer battery for the trip counter on G3HF (U > 3.0 V) and replace as necessary (see

13.2.2).4. Set switch S4(2) on the DSP module to "ON" (local test mode).5. Switch on the NSD 70D and press the reset button "RES" on the front of the G3HP module.6. Check that the unit is indeed in the local loop mode (corresponding alarm message on the pocket

terminal).7. Inject commands at the local terminal blocks and check the local command outputs for correct

operation. (Note: The trip counters on G3HF, if fitted, will count the local commands as well !)8. Switch off the NSD 70D and reset the local test mode by setting switch S4(2) on G3HP to "OFF".9. Switch on the NSD 70D and carry out the manual loop test according to a) above.10. The isolating terminals to the protection relay may be closed again, providing there is no alarm.11. Where trip counters G3HF are fitted, synchronise them in the local and remote station by resetting

them (press button "RESET" on G3HF).

NSD 70D



c) Checking the entire link:Following any changes made to the NSD 70D equipment or other components of the communicationschannel, it is recommended to repeat the commissioning procedure described in Appendix H of theseOperating Instructions for the units at both ends of the line.

Replace any modules found to be faulty. It is not recommended to carry out any repairs on site.

13.2.2 Replacing the buffer battery

DANGERDanger of explosion exists if the lithium battery isincorrectly replaced. Replace only with the same orequivalent type recommended by the manufacturer.

DANGERFor replacing and inserting the battery use always apotentially-free soldering iron.

Check the polarity before inserting the battery.

Caution For disposal, the regional and national regulationsfor electrical and electronic waste have to beobserved.

The lithium buffer battery in the module G3HF is able to retain the counter information for at least 500 hours.To avoid this time being exceeded during the normal life of the battery (typically 10 years), it is advisable todisconnect the battery by inserting the jumper plug FB, if the equipment is to remain out of service for a longperiod or when the module is on stock.

Order reference:Lithium battery 3.2V 0.5 Ah Maxell GJTN167002P0002

NSD 70D

Utility Communication Systems Storage, decommissioning and disposal


14. STORAGE, DECOMMISSIONING AND DISPOSAL

14.1 Safety instructions

Personnel qualification

DANGERAn authorised and properly trained service personnelonly is admitted to carry out storage,decommissioning and disposal.

Mechanical Installation

DANGERCabinets, which are not secured to the floor, tipforwards when the hinged frame is opened. Do notopen the hinged frame without precautions.

Electrical Installation

DANGERThe equipment must be switched off anddisconnected from the mains.

ESD protection

CautionESD


14.2 StorageThe specified conditions for storage are –30 °C to 70 °C with < 70 % humidity.Storage of the cubicle should be done in the original wooden casing and unbroken sealed plastic cover. Incase storage is to be done for longer periods of time, additional protection against rusting is requiredespecially in humid climate.Storage of modules should be preferably in the original packing or in antistatic bags with additionalmechanical protection.

NSD 70D

Utility Communication Systems Storage, decommissioning and disposal


14.3 DecommissioningThe decommissioning of the equipment should be done in the following steps.

• First of all the application, in which the equipment is used, must be disabled. This is of specialimportance when protection signalling is used.

• Switch OFF the equipment (Switch S1 and S2 OFF. See section 5.2). Isolate and disconnect theexternal power supply given to the equipment.

• Disconnect the external wiring of the equipment. This should be done carefully using the plantdrawings so that some other wiring does not get disconnected by mistake.

• In case the complete cubicle is to be dismounted, the bolts for fastening the cubicle to the baseframe or floor must be carefully removed giving support to the cubicle at the same time. Thecubicle can now be lifted and dismounted. It is preferable to keep the cubicle in horizontalposition if no external support can be given to the cubicle in vertical position.

• In case only the NSD 70D subrack is to be removed from the cubicle, first disconnect theinternal wiring and power supply between the NSD 70D subrack and the terminal blocks. Nowdismount the subrack by unscrewing the screws from the front.

• If the NSD 70D subrack or its modules are to be reused, they should be handled and packedproperly following precautions for ESD protection.

14.4 DisposalFor disposal, the regional and national regulations for electrical and electronic waste have to be observed.

The modularity of the equipment allows to separate component boards and casing, thus giving the opportu-nity for recycling.

NSD 70D

Utility Communication Systems List of assemblies and units

ABB Power Automation Ltd 1KHW000371 Language: EN A - 1Edition: 2000-07-27

PART 4 APPENDIX

A LIST OF ASSEMBLIES AND UNITS

�Note: All modules and blind-plates will be delivered in light-

beige colour. If you prefer the dark grey colour thenyou must order especially.

Rack assembly G7BGa HENF105334R0010

Power supply unit 230 VAC, 250 VDC / 24 VDC G3HG HENF327953R0001Power supply unit 110 VAC / 24 VDC (option) G3HQ HENF331173R0001Power supply unit 110 VDC / 24 VDC G3HH HENF327954R0001Power supply unit 48 VDC / 24 VDC G3HI HENF327955R0001Power supply unit 24 VDC / 24 VDC (option) G3HK HENF327956R0001

DSP module Firmware-Release 1.4.00 G3HP HENF331132R0021

Circuit diagram HENF327932

PCM interface G3HM HENF331048R0005Circuit diagram HENF331045

RS-422 interface G3HR HENF331290R0001Circuit diagram HENF331288

F.O. interface G3HS up to 5 km HENF331359R0001F.O. interface G3HS up to 30 km HENF331359R0101Circuit diagram HENF331356

Relay interface 1 G3HC HENF327935R0005Circuit diagram HENF327938

Relay interface 2 G3HD HENF331033R0005Circuit diagram HENF331071

Alarm interface G3HE HENF327998R0003Circuit diagram HENF327968

Trip counter G3HF HENF331051R0009Circuit diagram HENF331052

NSD 70D

Utility Communication Systems List of assemblies and units

ABB Power Automation Ltd 1KHW000371 Language: EN A - 2Edition: 2000-07-27

Connecting cable for G3HM V9LF HENF331004R0003Connecting cable for G3HC/G3HD/G3HE V9LE HENF327962R0003Connecting cable for G3HR (X.21) V9MG HENF331303R0002Connecting cable for G3HR (RS-530) V9MH HENF331302R0002Connecting cable for G3HR (RS-449) V9MI HENF331304R0002Connecting cable for G3HR (isolating terminals) V9MK HENF331305R0002Connecting cable for G3HR (RS-530 / FOX-U) V9ML 1KHL015071R0001Connecting cable for G3HS up to 30 km (SM) V9FZ HENF472166P...1)

Connecting cable for G3HS up to 30 km (SM) V9GA 2) HENF472167P...1)

Connecting cable for G3HS up to 30 km (MM) V9GD 2) HENF472170P...1)

Connecting cable for G3HS up to 5 km (MM) V9GB HENF472168P...1)

Connecting cable for G3HS up to 5 km (MM) V9GC HENF472169P...1)

Connecting cable for G3HS up to 5 km (MM) V9LZ 2) HENF469930P...1)

Options:

Pocket terminal HENF462905P0001Terminal emulation program for XT/AT PC PROTEC HENF468783R1200Blanking plate with labelling strip light-beige HENF327970R0001Blanking plate light-beige 3U-4R 1KHL015637R0004Blanking plate light-beige 3U-6R 1KHL015637R0006Blanking plate light-beige 3U-8R 1KHL015637R0008Cable duct HENF209567R0001Cover (for backplate) 1KHL015031P0001Special screwdriver (for terminal blocks) HENF468345P0001Cable adapter, diameter 4 mm / 2 mm red HENF458517P0001Cable adapter, diameter 4 mm / 2 mm black HENF458517P0002Standard accessories NSD 70/70C/70D HENF468416P0002Supply cable (cabinet installation) HENF465594P0001Extender card 3U / 160 I9BM…3) HENF468346R0001

Cover for unused faston Ord. Nr: HESG455631P0001Isolation sleeve for faston Ord. Nr: NBT 402942P0008

1) P... = length L in meter (possible range: 4 ... 99 m; default length: 4 m).2) These fibre optic cables are normally equipped with the described plugs at one end only.

At the other end customer specific plugs may be fixed on request.3) The modules G3HP and G3HS could be plugged into the extender card after a small modification.

For that purpose remove the red leads on the PCB extender by withdrawing the 4 screws.

NSD 70D

Utility Communication Systems Firmware versions and compatibility requirements

ABB Power Automation Ltd 1KHW000371 Language: EN B - 1Edition: 2000-07-27

B FIRMWARE VERSIONS AND COMPATIBILITY REQUIREMENTS

DSP module Firmware-Rel. 1.0.00 G3HP HENF331132R0001Release for zero series

DSP module Firmware-Rel. 1.1.00 G3HP HENF331132R0005Release first seriesnew features: internal trip counters for up to 6 commands realized by the firmware.Disadvantage: The trip counters are not buffered by battery and will be lost by areset.

DSP module Firmware-Rel. 1.2.00 G3HP HENF331132R0011new features: device addressing -> range 0...31; inverse T-operation; continuouscommand supervision moved from Tx to Rx; modifications due to new interfacetype G3HR.

DSP module Firmware-Rel. 1.3.00 G3HP HENF331132R0015new features: actual measured BER accessible via pocket terminal or PC;improvement of false address recognizability; modifications due to new interfacetype G3HS.

DSP module Firmware-Rel. 1.4.00 G3HP HENF331132R0021new features: device addressing -> range 0...127; additional internal alarmcounters.

All firmware versions have an upward compatibility. Therefor the newest firmware can always be used.

B1 Anomalies:For the NSD 70 series there are two different backplates G1CY (ancient) and G1CYa (new) in use. Now, ifthe interface G3HR will be used, then it is essential to have the new backplate (HENF209660 at least withRubric 3. Characters on the PCB: Aend. B !)The backplate G1CY was used in rack assembly G7BG (HENF105334R0001) only.

NSD 70D

Utility Communication Systems Symbols and abbreviations

ABB Power Automation Ltd 1KHW000371 Language: EN C - 1Edition: 2000-07-27

C SYMBOLS AND ABBREVIATIONS

&

& AND

OR

NOR

NAND

inverter

low-pass filter

bandpass filter

transformer

quartz oscillator contact pin

transzorb diode

C/O contact

N/O contact

aux. relay coil

DIL switch

opto-coupler

A/D converter

solid-state contact

limiter/amplifier

delay/prolongation

amplifier

N/C contact

BA70CE16.DRW

NSD 70D

Utility Communication Systems Block diagrams

ABB Power Automation Ltd 1KHW000371 Language: EN D - 1Edition: 2000-07-27

D BLOCK DIAGRAMS

UNBLOCKING 1

UNBLOCKING 2

ALARM 1

ALARM 2

250V, 10W

250V, 10W

250V,150W

250V,150W

V9LE

3

4

1

2

7

8

6

5

+5V

0V

SUPPLY 1 (G3HI) SUPPLY 2 (G3HG)

POWERON

0V

SUPPLY MONITORING 1

SUPPLY MONITORING 2

24V 0V

(+) (-)(+) (-)

WB

WC

WBC

WA

SUPP

LY M

ON 1

SUPP

LY M

ON 2

SUPP

LY 2

24V5V

WZ

WD

WY

SUPP

LY

[ N 1 ] [ N 9 ]

TRA

NSIT

- 1

MA

IN -

1

TRA

NSIT

- 2

POW

ER

SER. DATA - 1

BA70DD17.DRW

AU

[N28, X3]

delay ALARM

hold delay

K1 K2

K3 K4

COMMON ALARM

UNBLOCKING

EDEC

EAEB

<10s

<200ms <40ms

6c 7c 13a,c 15a,c

23a,b,c

24a,b,c

19a,b,c

20a,b,c

31a,b,c

32a,b,c

27a,b,c

28a,b,c

3c

5a

+5V

0V


EFEE

14a,c

15a,c

16a,c

k4

k3

R 60

R 59

R 48 R 49k2

k1

SUPP

LY 2

24V

5V 0V

TRAN

SIT

WI

WE

WF

WJ

WG

WH

T-O

UT0

T-O

UT1

T-O

UT2

T-IN

P0T-

INP1

T-IN

P2

T-IN

P0T-

INP1

T-IN

P2T-

OU

T0T-

OU

T1T-

OU

T2

[N21, X2]

cod

con

CON-DRCON-FSR

COD-DRCOD-FSRCOD-CLKR

CON-CLKR

cod

con

MUX

MUXcod/ con

cod/ con

T-INP0

T-INP1T-INP2

COD-DXCOD-FSXCOD-CLKX

CON-DXCON-FSXCON-CLKX

DXFSXCLKX

T-OUT1T-OUT2T-OUT0

DRFSRCLKR

f1f2

CLKIALARM

MUX

78

56

RX-DATA

RX-CLK

TX-CLK

TX-DATA

MAMB

+5V

+5VMCMD

5a

6a

4a

11a

10a

9a

9c

10c

11c

12a

3c

3a

8a

7a

22a,c

21a,c

18a,c

19a,c

29a,c

30a,c

27a,c

26a,c

3

4

1

2

V9L

F Tx DATA Tx SYNC

Rx SYNC

Rx DATA

TR/NORM

+clock sync.


64kHz+8kHzdecoder




64kHz+8kHzdecoder


NSD 70D



ICLK

TX C

NTR

B

OPT

3

OPT

4

OPT

1O

PT2

RX_

GU

ARD

TX C

NTR

ATX

_GU

ARD

CO

M. A

L.

PTXC

PRXC

SER. DATA - 1

MAIN - 1 MAIN - 1

MAI

N -

2

RX

CN

TRA

RX

CN

TRB

BA70DD18.DRW

[ N 46, X 6 ]

[ N 17, X 1 ]

7 SegmDecoderMUX

TX A

TX B

7 SegmDecoderMUX

RX A

RX BRESET

TRIP COUNTER (G3HF)

BCDCOUNTER

BCDCOUNTER

BCDCOUNTER

BCDCOUNTER

5V

Ubat3.2V

f1

f2

19a,

b,c

20a,

b,c

27a,

b,c

28a,

b,c

23a,

b,c

24a,

b,c

31a,

b,c

32a,

b,c

12a9a10a4a5a8c9c6c

DISPLAYA / B ; D / E

FBFA

SWITCH INPUT BUFFER


TMS 320C25

1

1

ser. input

ser. output


PROM8k*8

RAM8k*8

PROM8k*8

RAM8k*8

WATCHDOG

UART

RS

232

40MHz

ICLK

8 BITDATA

BU

FFE

R

BU

FFE

R

RESET

ALARM

COM1

BU

FFE

R

9 +5V4 DTR6 DSR8 RTS7 CTS

3 -RXD2 -TXD

5 GND

"AL""RDY"

"GRD"

"TRP"

RES

I/O-BUS

FSX

DRCLKR

FSR

-WRMP3

BU

FF

ER

PRXAPRXBPRXCPRXD

PTXAPTXBPTXCPTXD

COMMON ALARM

COM. AL.

DX

13a

1a2a3a4a6c7c3c5c

6a7a8a9a

12c

11c10c

11a12a10a

3c

13c

5a1c

UNBLOCKING

BUFF

ER

PTXEPTXF

-TXGUARD

"SYN"

"BER"

PRXEPRXF

8c9c

-RXGUARD

DSP MODULE (G3HP)


LOOP TEST

CLKX

CO

MM

ON

ALA

RM

PT

XD

O

PT1

O

PT2

PRXD

OPT

3

O

PT4

TX-G

UAR

D

R

X-G

UAR

D

IC

LK

U

NBL

OC

KIN

G

WV

WK

WS

WQ

WL

WO

WM

WU

WW

WX

WU

N

WTWRWPWN

OPT1OPT2OPT3OPT4

OPT1OPT2OPT3OPT4

CO

MM

ON

ALA

RM

PT

XA/D

PT

XB/E

PT

XC/F

PRXA

/D

PR

XB/E

PRXC

/F

TX

-GU

ARD

R

X-G

UAR

DIC

LK

U

NBL

OC

KIN

G

6 C

OM

MAN

D O

PTIO

N

NSD 70D



1

2s

delay holdALARM

+5V

"TX""RX"

COMMON ALARM

RX_GUARD

TX_GUARD

PTX

TX_CNTR

1

TRIPEXTENS

R37

R58

K1

K2 k2

R79

CACB

R78

K3k3

k1

INTERFACE 2 (G3HD)

50ms

200ms


27a,b,c

28a,b,c

19a,b,c

20a,b,c

3c

6a

1c

5c

3a

1a

23a,b,c

24a,b,c

31a,b,c

32a,b,c

<2s

CICH

CGCF

CKCJ

CC

CD

CE

PRX

8a RX_CNTR &

&

&

&

&

ALARM

AUX

RX TRIP

TX TRIP

250V,2A

250V,10W

250V,150W

48...250V,<10mA

6

5

V9LE

8

7

4

3

2

1

ALARM

AUX

RX TRIP

TX TRIP

250V,150W

250V,150W

48...250V,<10mA

250V,150W

V9LE

1

2

7

8

3

4

5

6

MAI

N -

1

BA70DD19.DRW

( + )

( - )

( + )

( - )

( + )

( - )

[ N 34, X 4 ]

[ N 40, X 5 ]

2s

delay holdALARM

+5V

"TX""RX"

COMMON ALARM

PRX

RX_GUARD

TX_GUARD

PTX

TX_CNTR

R37

20ms100ms

CC

CDCE

R 58

K1 k1

K2 k2 CK

CACB

INTERFACE 1 (G3HC)


20a,b,c

19a,b,c

24a,b,c

23a,b,c

32a,b,c

31a,b,c

27a,b,c

28a,b,c

3c

12a

6a

1c

1a

3a

5c

CJ

R55

TRIPEXTENS

8a RX_CNTR

ICLK

< 2s

&

&

&

&

&

&

&

NSD 70D



+5V

0V

24V 0V

SUPPLY 224 V

SUPPLY MON 1

5 V0 V

SUPPLY MON 2

TRA

NSIT

- 2

POW

ER

SER

. DAT

A - 2

MAI

N - 2

BA70DD20.DRW

[ N 62, X 9 ]

[ N 55, X 8 ]

POWER ON

cod

con

CON-DRCON-FSR

COD-DRCOD-FSRCOD-CLKR

CON-CLKR

cod

con

MUX

MUXcod/ con

cod/ con

T-INP0

T-INP1T-INP2

COD-DXCOD-FSXCOD-CLKX

CON-DXCON-FSXCON-CLKX

DXFSXCLKX

T-OUT1T-OUT2T-OUT0

DRFSRCLKR

f1f2

CLKIALARM

MUX

78

56

RX-DATA

RX-CLK

TX-CLK

TX-DATA

MAMB

+5V

+5VMCMD

5a

6a

4a

11a

10a

9a

9c

10c

11c

12a

3c

3a

8a

7a

22a,c

21a,c

18a,c

19a,c

29a,c

30a,c

27a,c

26a,c

3

4

1

2

V9LF

Tx DATA Tx SYNC

Rx SYNC

Rx DATA

TR/NORM

+clock sync.


64kHz+8kHzdecoder




64kHz+8kHzdecoder


UNBLOCKING 1

UNBLOCKING 2

ALARM 1

ALARM 2

250V, 10W

250V, 10W

250V,150W

250V,150W

V9LE

3

4

1

2

7

8

6

5

delay ALARM

hold delay

K1 K2

K3 K4

COMMON ALARM

UNBLOCKING

EDEC

EAEB

<10s

<200ms <40ms

6c 7c 13a,c 15a,c

23a,b,c

24a,b,c

19a,b,c

20a,b,c

31a,b,c

32a,b,c

27a,b,c

28a,b,c

3c

5a

+5V

0V


EFEE

14a,c

15a,c

16a,c

k4

k3

R 60

R 59

R 48 R 49k2

k1

NSD 70D



SER

. DAT

A - 2

MAIN - 2

BA70DD21.DRW

[ N 51, X 7 ]

[ N 80, X 12 ]

ICLK

TX C

NTR

B

OPT

3

OPT

4

OPT

1

OPT

2

RX_

GU

ARD

TX C

NTR

ATX

_GU

ARD

CO

M. A

L.

PTXC

PRXC

RX

CN

TRA

RX

CN

TRB

7 SegmDecoderMUX

TX A

TX B

7 SegmDecoderMUX

RX A

RX BRESET

TRIP COUNTER (G3HF)

BCDCOUNTER

BCDCOUNTER

BCDCOUNTER

BCDCOUNTER

5V

Ubat3.2V

f1

f2

19a,

b,c

20a,

b,c

27a,

b,c

28a,

b,c

23a,

b,c

24a,

b,c

31a,

b,c

32a,

b,c

12a9a10a4a5a8c9c6c

DISPLAYA / B ; D / E

FBFA

SWITCH INPUT BUFFER


TMS 320C25

1

1

ser. input

ser. output


PROM8k*8

RAM8k*8

PROM8k*8

RAM8k*8

WATCHDOG

UART

RS

232

40MHz

ICLK

8 BITDATA

BU

FF

ER

BU

FFE

R

RESET

ALARM

COM1

BU

FF

ER

9 +5V4 DTR6 DSR8 RTS7 CTS

3 -RXD2 -TXD

5 GND

"AL""RDY"

"GRD"

"TRP"

RES

I/O-BUS

FSX

DRCLKR

FSR

-WRMP3

BU

FFE

R

PRXAPRXBPRXCPRXD

PTXAPTXBPTXCPTXD

COMMON ALARM

COM. AL.

13a

1a2a3a4a6c7c3c5c

6a7a8a9a

12c

11c10c

11a12a10a

3c

13c

5a1c

UNBLOCKING

BUFF

ER

PTXEPTXF

-TXGUARD

"SYN"

"BER"

PRXEPRXF

8c9c

-RXGUARD

DSP MODULE (G3HP)


LOOP TEST

CLKXDX

NSD 70D



2s

delay holdALARM

+5V

"TX""RX"

COMMON ALARM

RX_GUARD

TX_GUARD

PTX

TX_CNTR

TRIPEXTENS

R37

R58

K1

K2 k2

R79

CACB

R78

K3k3

k1

INTERFACE 2 (G3HD)

50ms

200ms


27a,b,c

28a,b,c

19a,b,c

20a,b,c

3c

6a

1c

5c

3a

1a

23a,b,c

24a,b,c

31a,b,c

32a,b,c

<2s

CICH

CGCF

CKCJ

CC

CD

CE

PRX

8a RX_CNTR &

&

&

&

&

ALARM

AUX

RX TRIP

TX TRIP

250V,2A

250V,10W

250V,150W

48...250V,<10mA

6

5

V9LE

8

7

4

3

2

1

ALARM

AUX

RX TRIP

TX TRIP

250V,150W

250V,150W

48...250V,<10mA

250V,150W

V9LE

1

2

7

8

3

4

5

6

MAI

N - 2

BA70DD22.DRW

( + )

( - )

( + )

( - )

( + )

( - )

[ N 68, X 4 ]

[ N 74, X 5 ]

2s

delay holdALARM

+5V

"TX""RX"

COMMON ALARM

PRX

RX_GUARD

TX_GUARD

PTX

TX_CNTR

R37

20ms100ms

CC

CDCE

R 58

K1 k1

K2 k2 CK

CACB

INTERFACE 1 (G3HC)


20a,b,c

19a,b,c

24a,b,c

23a,b,c

32a,b,c

31a,b,c

27a,b,c

28a,b,c

3c

12a

6a

1c

1a

3a

5c

CJ

R55

TRIPEXTENS

8a RX_CNTR

ICLK

< 2s

&

&

&

&

&

&

&

NSD 70D



Block diagram for slots N21 and N55 using the RS-422 interface type G3HR:

TR

AN

SIT

- 1

MA

IN -

1

SER. DATA - 1

+24V+5V0V

TR

AN

SIT

- 2

SER

. DA

TA -

2

MA

IN -

2

BA70DE32.DRW

+24V+5V0V

[N55, X8]

[N21, X2]

T-INP0 3a

13a,c

18a,c RD-A

RD-B

RT-A

RT-B

R22

ST-B

SHIELD

ST-B

ST-A

RT-B

RT-A

RD-B

RD-A

GNDI-2

+5VI-2

SD-A

SD-A

SD-B

SD-B

19a,c

21c

22c

29c

30c

1

3

16

17

TT-A

TT-B

+5VI-1

GNDI-1

9

15

12

20

7

2

14

24

11

21a

22a

26a,c

27a,c

TT-A

TT-B

29a

30a

T-OUT1 5a

T-OUT2 6a

T-OUT0 4a

DR

FSR

CLKR

11a

10a

9a

T-INP2

T-INP1

8a

7a

I-CLK 12a

COMMON-AL 3c

14a,c

15/16a,c

+24V

+5V

DX 11c

FSX 10c

CLKX 9c

MUX

RD

RT

ST

SD

TT

INT. CLOCK

TT SYNCH.Rx SYNCH..

Tx CLOCK

TRANSIT

TT


ALARMAL


CLOCK4.096MHz


f1

f2

f1

f2

Rx CLOCK

S1.2

S1.3

S1.6S1.5

S1.4

S1.1S1.7

SY3

ST-A

R21

SY2

R20

SY1

CLOCK4.9152MHz

f1

f2

f1

f2

R19

RS-

530

(Fro

ntpl

ate)

V9M

G (X

.21)

, V9M

H (R

S-53

0), .

.....

V9M

I (R

S-4

49),

V9M

K (T

erm

inal

s) DATA DECODING /CLOCK SYNCHRO-

NISATION


NISATION

T-INP0 3a

13a,c

18a,c RD-A

RD-B

RT-A

RT-B

R22

ST-B

SHIELD

ST-B

ST-A

RT-B

RT-A

RD-B

RD-A

GNDI-2

+5VI-2

SD-A

SD-A

SD-B

SD-B

19a,c

21c

22c

29c

30c

1

3

16

17

TT-A

TT-B

+5VI-1

GNDI-1

9

15

12

207

2

14

24

11

21a

22a

26a,c

27a,c

TT-A

TT-B

29a

30a

T-OUT1 5a

T-OUT2 6a

T-OUT0 4a

DR

FSR

CLKR

11a

10a

9a

T-INP2

T-INP1

8a

7a

I-CLK 12a

COMMON-AL 3c

14a,c15/16a,c

+24V

+5V

DX 11c

FSX 10c

CLKX 9c

MUX

RD

RT

ST

SD

TT

INT. CLOCK

TT SYNCH.Rx SYNCH..

Tx CLOCK

TRANSIT

TT


ALARMAL


CLOCK4.096MHz


f1

f2

f1

f2

Rx CLOCK

S1.2

S1.3

S1.6S1.5

S1.4

S1.1S1.7

SY3

ST-A

R21

SY2

R20

SY1

CLOCK4.9152MHz

f1

f2

f1

f2

R19

RS-

530

(Fro

ntpl

ate)

V9M

G (X

.21)

, V9M

H (R

S-53

0), .

.....

V9M

I (R

S-4

49),

V9M

K (T

erm

inal

s) DATA DECODING /CLOCK SYNCHRO-

NISATION


NISATION

NSD 70D



Block diagram for slots N21 and N55 using the F.O. interface G3HS:

TRA

NSIT

- 1

MAI

N - 1

SER. DATA - 1

TRA

NSIT

- 2

SER

. DAT

A - 2

MAI

N - 2

BA70DD37.DRW

+24V+5V0V

[N55, X8]

[N21, X2]

+24V+5V0V

+24V

+5V0V

MASTER/SLAVE

T-INP0 3a

T-OUT1 5a

T-OUT2 6a

T-OUT0 4a

DRFSR

CLKR

11a

10a

9a

T-INP2

T-INP1

8a

7a

CLKX

11c

f1

f2

FPGA

CPLOC4096

DATA TX64

DATA RX64

RX FAIL



SYNC

BER DETECTION

SYNC/PARITY

CLOCK-SELECTLOGIC

CPRX4096

Bit 18

Bit 18

Bit 7

RX_CLK64

TX_CLK64

Bit 6 8kHz Clock

8kHz8kHzBit 6

ORX

FSX9c

DX

10cOTX

MCMI

NRZ

MCMI

NRZ

PLL

DEMUX

MUX

TRANSIT

NORMAL

CPRX2048

REM ERROR


I-CLK 12a

S1.1

S1.2

SELECT_OPOW

S1.3

CLOCK4.096MHz

COMMON-AL 3cAlarm

AL TxDATA Rx DATACLOCK4.9152MHz

TRANSIT / NORMAL

13a,c

14a,c15/16a,c

+24V

+5V

MASTER/SLAVE

T-INP0 3a

T-OUT1 5a

T-OUT2 6a

T-OUT0 4a

DR

FSR

CLKR

11a

10a

9a

T-INP2

T-INP1

8a

7a

CLKX

11c

f1

f2

FPGA

CPLOC4096

DATA TX64

DATA RX64

RX FAIL



SYNC

BER DETECTION

SYNC/PARITY

CLOCK-SELECTLOGIC

CPRX4096

Bit 18

Bit 18

Bit 7

RX_CLK64

TX_CLK64

Bit 6 8kHz Clock

8kHz8kHzBit 6

ORX

FSX

9c

DX

10cOTX

MCMI

NRZ

MCMI

NRZ

PLL

DEMUX

MUX

TRANSIT

NORMAL

CPRX2048

REM ERROR


I-CLK 12a

S1.1

S1.2

SELECT_OPOW

S1.3

CLOCK4.096MHz

COMMON-AL 3cAlarm

AL Tx DATA Rx DATACLOCK4.9152MHz

TRANSIT / NORMAL

13a,c

14a,c15/16a,c

+24V

+5V

NSD 70D

Utility Communication Systems Dependability and security measurements

ABB Power Automation Ltd 1KHW000371 Language: EN E - 1Edition: 2000-07-27

E DEPENDABILITY AND SECURITY MEASUREMENTS

All dependability and security measurements were performed according to the procedures prescribed inIEC 60834-1.

Dependability measurements: command duration 50 msduration of pause 200 msbit error rate (BER) 1E-03 ... 1E-06continuous

Dependability is determined by sending a large number of commands to the remote station. The number ofcommands transmitted and the number of commands received within a specified time (normally 1.3*T0,1.5*T0 and 2*T0) are recorded. The higher the BER at the input of the receiving NSD 70D, the fewer thecommands which will be received in the prescribed time.

The following applies for a sufficiently high number of transmitted commands:

Pmc = (NT - NR) / NT

Pmc = probability of missing a commandNT = number of commands transmittedNR = number of commands received

Security measurements: BER burst duration 200 msduration of pause 200 msBER 0.5

Security is determined by coupling bursts of white noise of high amplitude into the communications channel.This results in a bit error rate of 0.5. The number of BER bursts injected and the number of false commandsthey cause at the receiving end are counted.

The security is then calculated according to the following relationship:

Puc = Nuc / NB

Puc = probability of an unwanted commandNuc = number of unwanted commands receivedNB = number of noise bursts transmitted

NSD 70D



Dependability of commands A...F

Equipment settings and configuration:

Nominal transmission time T0: T01 = 3.0 ms (Puc < 10-6)Data interface: PCM interface G3HMData transfer rate: 64 kBit/sRelay interface: G3HCAddressing: OFFCommand outputs: uninfluenced by an alarm

Tac = 1.0 * T0 = 3 ms

Tac = 1.3 * T0 = 3.9 ms

Tac = 1.5 * T0 = 4.5 ms

Tac = 2.0 * T0 = 6.0 ms

BER10 -1 10 -2 10 -3 10 -4 10 -5 10 -6

10 -4

10 -3

10 -2

10 -1

10 -0

10 -5

Pm

c

DEPEND1.DRW

Pmc = probability of missing a command T0 = nominal transmission time (undisturbed)BER = bit error rate Tac = actual transmission time

NSD 70D





Nominal transmission time T0: T02 = 6.0 ms (Puc < 10-28)Data interface: PCM interface G3HMData transfer rate: 64 kBit/sRelay interface: G3HCAddressing: OFFCommand outputs: uninfluenced by an alarm

Tac = 2.0 * T0 = 12.0 ms

Tac = 1.5 * T0 = 9.0 ms

Tac = 1.3 * T0 = 7.8 ms

Tac = 1.0 * T0 = 6.0 ms

Tac = 3.0 * T0 = 18.0 ms

BER10 -1 10 -2 10 -3 10 -4 10 -5 10 -6

10 -4

10 -3

10 -2

10 -1

10 -0

10 -5

Pm

c

DEPEND2.DRW


NSD 70D





Nominal transmission time T0: T01 = 3.0 ms (Puc << 10-6)Data interface: PCM interface G3HMData transfer rate: 64 kBit/sRelay interface: G3HCAddressing: ONCommand outputs: set to their quiescent state by an alarm;

alarm given for a bit error rate of BER > 1E-03

Tac = 1.0 * T0 = 3.0 msTac = 1.3 * T0 = 3.9 ms

Tac = 1.5 * T0 = 4.5 ms

BER

Pm

c

DEPEND3.DRW

10 -1 10 -2 10 -3 10 -4 10 -5 10 -6

10 -4

10 -3

10 -2

10 -1

10 -0

10 -5


NSD 70D





Nominal transmission time T0: T02 = 6.0 ms (Puc << 10-28)Data interface: PCM interface G3HMData transfer rate: 64 kBit/sRelay interface: G3HCAddressing: ONCommand outputs: set to their quiescent state by an alarm;

alarm given for a bit error rate of BER > 1E-03

Tac = 2.0 * T0 = 12.0 ms

Tac = 1.5 * T0 = 9.0 ms

Tac = 1.3 * T0 = 7.8 ms

Tac = 1.0 * T0 = 6.0 ms

BER

Pm

c

DEPEND4.DRW

10 -1 10 -2 10 -3 10 -4 10 -5 10 -6

10 -4

10 -3

10 -2

10 -1

10 -0

10 -5


NSD 70D

Utility Communication Systems Programming instructions

ABB Power Automation Ltd 1KHW000371 Language: EN F - 1Edition: 2000-07-27

F PROGRAMMING INSTRUCTIONS NSD 70D

According to HENF600544

ABB Power Automation Ltd HENF 600544Responsible Department:

NKT2Take over Department: Revision:

F 1KHL016595Doc. Type: File No.:

214/18

Prepared:

93-10-20 OECChecked:

93-10-20Approved:

00-06-15 sig. StLanguage:

ENPage:

1/11

Valid for: Derived from: Replaces: Classify No.:

600544FE.doc

We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure tothird parties without express authority is strictly forbidden. © ABB Power Automation Ltd

PROGRAMMING INSTRUCTIONS NSD 70D

Designations and abbreviations used:

Designation Significance

N1...N80 position in the equipment rack

[X] fixed settings

MA, 150 Ohm default settings, printed in bold type

[ ............ ] nominal values or design settings

Note: After programming the modules are not interchangeable !When exchanging modules they must be reprogrammed.

1. Units fitted in rack and rack programming

1.1 Supply G3HG N1 [ ] N9 [ ]Supply G3HH N1 [ ] N9 [ ]Supply G3HI N1 [ ] N9 [ ]Supply G3HK N1 [ ] N9 [ ]Supply G3HQ N1 [ ] N9 [ ]

1.2 DSP Module G3HP N17 [ ] N51 [ ]

1.3 Data Interface:1.3.1 PCM Interface G3HM N21 [ ] N55 [ ]1.3.2 RS-422 Interface G3HR N21 [ ] N55 [ ]1.3.3 F.O. Interface G3HS up to 5 km N21 [ ] N55 [ ]1.3.4 F.O. Interface G3HS up to 30 km N21 [ ] N55 [ ]

1.4 Alarm Interface G3HE N28 [ ] N62 [ ]

1.5 Relay Interface G3HC N34 [ ] N68 [ ]N40 [ ] N74 [ ]N46 [ ] N80 [ ]

1.6 Relay Interface G3HD N34 [ ] N68 [ ]N40 [ ] N74 [ ]N46 [ ] N80 [ ]

1.7 Trip Counter G3HF N46 [ ] N80 [ ]

Revision:

F 1KHL016595Language:

ENPage:

2/11 HENF 600544

Rack G7BG:

For the desired operating mode, only the jumper plugs given below have to be inserted.The remaining jumpers should be plugged into the spare positions (SPARES).

Programming Jumper plugs on backplane

Normal operation:

1.8 1 NSD 70D 1 supply unit (N1) or WA, WK, WL, WU, WV, WW, WX, WS,2 redundant supply units WQ, WO, WM, WZ, WC, WB, WY [ ]

1.9 2 NSD 70D 1 common supply unit (N1) or 2 redundant supply units WA, WT, WR, WP, WN, WD, WC, WB [ ]

1.10 2 NSD 70D 2 separate supply units WT, WR, WP, WN, WBC, WD [ ]SUPPLY 1 for the left rack halfSUPPLY 2 for the right rack half

T-operation:

1.11 2 NSD 70D 1 common supply unit (N1) or WA, WE, WF, WG, WH, WI, WJ, WT2 redundant supply units WR, WP, WN, WD, WB, WC [ ]

2. Module programming

2.1 DSP module N17 [ ] N 51 [ ]

2.1.1 Switch setting S4 S4ON OFF

Command output latching status during an alarm: / (8) [ ] [ ]BER/SYN or address error alarm (refer to table below) \ (7) [ ] [ ]T-operation ON / OFF (6) [ ] [ ]Cyclic loop test ON / OFF (5) [ ] [ ]Remote monitoring ON / OFF (4) [ ] [ ]Continuous trip monitoring ON / OFF (3) [ ] [ ]Local test mode ON / OFF (2) [ ] [ ]Inverse T-operation (FW-rel. 1.2.00 and higher) ON / OFF (1) [ ] [ ]

S4(7)=0 S4(8)=0 -> Command outputs do not respond to an alarm.S4(7)=0 S4(8)=1 -> Command outputs set to the quiescent state.S4(7)=1 S4(8)=1 -> Command outputs set to the tripped state.S4(7)=1 S4(8)=0 -> Command outputs retain the statuses prior to the alarm.

Revision:


ENPage:

3/11 HENF 600544


Address remote station = sum of ON-values ON = 25 = 32 / (8) [ ] [ ](firmware-rel. 1.4.00 and higher) ON = 26 = 64 \ (7) [ ] [ ]Tev Trip F (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N80] (6) [ ] [ ]Tev Trip E (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N74] (5) [ ] [ ]Tev Trip D (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N68] (4) [ ] [ ]Tev Trip C (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N46] [N80]2) (3) [ ] [ ]Tev Trip B (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N40] [N74]2) (2) [ ] [ ]Tev Trip A (ON: T0 < 6 ms; OFF: T0 < 3 ms)1) [N34] [N68]2) (1) [ ] [ ]

1) T0 < 6 ms => Tev = 4 ms; T0 < 3 ms => Tev = 1 ms;The above given nominal transmission times T0 apply when using the interface G3HC. T0 is 5 ... 8 ms longer using interface typeG3HD.The auxiliary output (AUX) of the interface G3HC can have an additional delay of up to 2.5 ms compared with the main commandoutput.When using the interface G3HR with programmed transmission rate of 56 kBit/s, maximum 1 ms longer times for T0 to occur, i.e.(ON: T0 < 7 ms; OFF: T0 < 4 ms).

2) Slots for a second device in the same rack.


ON = 20 = 1 / (8) [ ] [ ]Address local station = sum of ON-values ON = 21 = 2 | (7) [ ] [ ](firmware-rel. 1.2.00 and higher) ON = 22 = 4 | (6) [ ] [ ](default = 00) ON = 23 = 8 | (5) [ ] [ ]

ON = 24 = 16 \ (4) [ ] [ ]Device addressing (firmware-rel. 1.2.00 and higher) ON / OFF (3) [ ] [ ]Address local station = sum of ON-values ON = 25 = 32 / (2) [ ] [ ](firmware-rel. 1.4.00 and higher) ON = 26 = 64 \ (1) [ ] [ ]


ON = 20 = 1 / (8) [ ] [ ]Address remote station = sum of ON-values ON = 21 = 2 | (7) [ ] [ ](firmware-rel. 1.2.00 and higher) ON = 22 = 4 | (6) [ ] [ ](default = 00) ON = 23 = 8 | (5) [ ] [ ]

ON = 24 = 16 \ (4) [ ] [ ]Bit Error Rate (BER) / (3) [ ] [ ]alarm threshold | (2) [ ] [ ](refer to table below) \ (1) [ ] [ ]

S7(1) S7(2) S7(3) BEROFF ON ON 1E-03ON OFF OFF 1E-04ON OFF ON 1E-05ON ON OFF 1E-06

Revision:


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4/11 HENF 600544

2.2 Data Interface

2.2.1 PCM Interface G3HM N21 [ ] N55 [ ]

Jumper plugs:

Operating mode Codirectional MA [ ]Contradirectional MB [ ]Transit relaying MC [ ]Normal operation MD [ ]

2.2.2 RS-422 Interface G3HR N21 [ ] N55 [ ]


Not used (8) [ ] [X]Terminal timing (TT) to DCE ON / OFF (7) [ ] [ ]TT clock synchronisation ON: on RX Data / OFF: none (6) [ ] [ ]Receive clock synchronisation ON: on RX Data / OFF: none (5) [ ] [ ]Transit relaying ON / OFF (4) [ ] [ ]Internal clock frequency ON: 56 kHz; OFF: 64 kHz (3) [ ] [ ]Receive clock ON: internal; OFF: external (RT) (2) [ ] [ ]Transmit clock ON: internal; OFF: external (ST) (1) [ ] [ ]

Cable termination resistance:

Signal Input Abbreviation Solder Bridge Impedance

Receive Data RD SY1 = OFF ≥≥≥≥ 4 kOhm [ ]SY1 = ON 100 Ohm [ ]

Receive Timing RT SY2 = OFF ≥≥≥≥ 4 kOhm [ ]SY2 = ON 100 Ohm [ ]

Send Timing ST SY3 = OFF ≥≥≥≥ 4 kOhm [ ]SY3 = ON 100 Ohm [ ]

ON -> The two solder pads SY. are connected with solderOFF -> The two solder pads SY. are not connected

Grounding arrangement:

All signals d.c. isolated R19 = ∞∞∞∞ (not fitted) [ ]Circuit ground directly connected to frame ground R19 = 0 Ohm (wire strap) [ ]Circuit ground connected to frame ground by R19 = 100 Ohm, 0.5 W [ ]

2.2.3 F.O. Interface G3HS N21 [ ] N55 [ ]


Not used (8) [ ] [X]Not used (7) [ ] [X]Not used (6) [ ] [X]Not used (5) [ ] [X]Not used (4) [ ] [X]Optical transmission power 1) ON: maximum / OFF: reduced (3) [ ] [ ]Operating mode ON: master / OFF: slave (2) [ ] [ ]Transit relaying ON / OFF (1) [ ] [ ]

1) Transmission power reduction is only possible with the G3HS up to 30 km. For the G3HS up to 5 km switch S1(3) must alwaysbe ON!

Revision:


ENPage:

5/11 HENF 600544

2.3 Relay interface G3HC / G3HD

2.3.1 Command A N34 [ ] N68 [ ]

Jumper plugs:G3HC G3HD

TX TRIP Ubatt = 48 VDC...110 VDC CB CB [ ]Ubatt = 125 VDC...250 VDC CA CA [ ]

Prolongation G3HC G3HDvariable ThA = 5 ms ThA = 20 ms CC CC [ ]

(R37 = 8k20) (R37 = 27k0)ThA = [ ............ ] ms ThA = [ ............ ] ms CC CC [ ]R37 = [ ............ ] kOhm R37 = [ ............ ] kOhm

fixed ThA = 20 ms ThA = 50 ms CD CD [ ]ThA = 100 ms ThA = 200 ms CE CE [ ]

AUX prot. resistor R55 = 150 Ohm R78 = 0 Ohm [ ]R55 = [ ............ ] Ohm R78 = [ ............ ] Ohm

ALARM Contact closes in alarm state CK CK [ ]Contact opens in alarm state CJ CJ [ ]

delay TvA = 2 s TvA = 2 s [ ]R58 = 820 kOhm R58 = 820 kOhmSpecial: [ .......... ] ms Special: [ .......... ] ms [ ]R58 = [ .......... ] kOhm R58 = [ .......... ] kOhm

For G3HD only: RX TRIP N/O contact CF [ ]N/C contact CG [ ]

AUX N/O contact CH [ ]N/C contact CI [ ]

RX TRIP prot. resistor R79 = 0 Ohm [ ]R79 = [ ............ ] Ohm

Prolongation for command A: G3HC -> ThA = 0.6 * R37 R37 = ThA * 1.7(R in kOhm, T in ms) G3HD -> ThA = 0.6 * R37 + 3 R37 = (ThA - 3) * 1.7

possible range: G3HC -> ThA -> ( 5....500) ms R37 -> (8.2....820) kOhmG3HD -> ThA -> (20....500) ms R37 -> ( 27....820) kOhm

Alarm delay : G3HC -> TvA = 2.5 * R58 +10 R58 = (TvA -10) * 0.4(R in kOhm, T in ms) G3HD -> TvA = 2.5 * R58 +10 R58 = (TvA -10) * 0.4

possible range: G3HC -> TvA -> (50....2000) ms R58 -> (15....820) kOhmG3HD -> TvA -> (50....2000) ms R58 -> (15....820) kOhm

Current limiting resistors: R55, R78, R79 ≥ Uk/2 (R55, R78, R79 in Ohm, terminal voltage Ukin Volt)

remark: Heavy duty contacts on G3HD! Normally solder bridges are in placeof the current limiting resistors R78 and R79.

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2.3.2 Command B N40 [ ] N74 [ ]


TX TRIP Ubatt = 48 VDC...110 VDC CB CB [ ]Ubatt = 125 VDC...250 VD CA CA [ ]

Prolongation G3HC G3HDvariable ThB = 5 ms ThB = 20 ms CC CC [ ]

(R37 = 8k20) (R37 = 27k0)ThB = [ ............ ] ms ThB = [ ............ ] ms CC CC [ ]R37 = [ ............ ] kOhm R37 = [ ............ ] kOhm

fixed ThB = 20 ms ThB = 50 ms CD CD [ ]ThB = 100 ms ThB = 200 ms CE CE [ ]



delay TvB = 2 s TvB = 2 s [ ]R58 = 820 kOhm R58 = 820 kOhmSpecial: [ .......... ] ms Special: [ .......... ] ms [ ]R58 = [ .......... ] kOhm R58 = [ .......... ] kOhm




Prolongation for command B: G3HC -> ThB = 0.6 * R37 R37 = ThB * 1.7(R in kOhm, T in ms) G3HD -> ThB = 0.6 * R37 + 3 R37 = (ThB - 3) * 1.7

possible range: G3HC -> ThB -> ( 5....500) ms R37 -> (8.2....820) kOhmG3HD -> ThB -> (20....500) ms R37 -> ( 27....820) kOhm

Alarm delay : G3HC -> TvB = 2.5 * R58 +10 R58 = (TvB -10) * 0.4(R in kOhm, T in ms) G3HD -> TvB = 2.5 * R58 +10 R58 = (TvB -10) * 0.4

possible range: G3HC -> TvB -> (50....2000) ms R58 -> (15....820) kOhmG3HD -> TvB -> (50....2000) ms R58 -> (15....820) kOhm



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2.3.3 Command C N46 [ ] N80 [ ]



Prolongation G3HC G3HDvariable ThC = 5 ms ThC = 20 ms CC CC [ ]

(R37 = 8k20) (R37 = 27k0)ThC = [ ............ ] ms ThC = [ ............ ] ms CC CC [ ]R37 = [ ............ ] kOhm R37 = [ ............ ] kOhm

fixed ThC = 20 ms ThC = 50 ms CD CD [ ]ThC = 100 ms ThC = 200 ms CE CE [ ]



delay TvC = 2 s TvC = 2 s [ ]R58 = 820 kOhm R58 = 820 kOhmSpecial: [ .......... ] ms Special: [ .......... ] ms [ ]R58 = [ .......... ] kOhm R58 = [ .......... ] kOhm




Prolongation for command C: G3HC -> ThC = 0.6 * R37 R37 = ThC * 1.7(R in kOhm, T in ms) G3HD -> ThC = 0.6 * R37 + 3 R37 = (ThC - 3) * 1.7

possible range: G3HC -> ThC -> ( 5....500) ms R37 -> (8.2....820) kOhmG3HD -> ThC -> (20....500) ms R37 -> ( 27....820) kOhm

Alarm delay : G3HC -> TvC = 2.5 * R58 +10 R58 = (TvC -10) * 0.4(R in kOhm, T in ms) G3HD -> TvC = 2.5 * R58 +10 R58 = (TvC -10) * 0.4

possible range: G3HC -> TvC -> (50....2000) ms R58 -> (15....820) kOhmG3HD -> TvC -> (50....2000) ms R58 -> (15....820) kOhm



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2.3.4 Command D N68 [ ]



Prolongation G3HC G3HDvariable ThD = 5 ms ThD = 20 ms CC CC [ ]

(R37 = 8k20) (R37 = 27k0)ThD = [ ............ ] ms ThD = [ ............ ] ms CC CC [ ]R37 = [ ............ ] kOhm R37 = [ ............ ] kOhm

fixed ThD = 20 ms ThD = 50 ms CD CD [ ]ThD = 100 ms ThD = 200 ms CE CE [ ]



delay TvD = 2 s TvD = 2 s [ ]R58 = 820 kOhm R58 = 820 kOhmSpecial: [ .......... ] ms Special: [ .......... ] ms [ ]R58 = [ .......... ] kOhm R58 = [ .......... ] kOhm




Prolongation for command D: G3HC -> ThD = 0.6 * R37 R37 = ThD * 1.7(R in kOhm, T in ms) G3HD -> ThD = 0.6 * R37 + 3 R37 = (ThD - 3) * 1.7

possible range: G3HC -> ThD -> ( 5....500) ms R37 -> (8.2....820) kOhmG3HD -> ThD -> (20....500) ms R37 -> ( 27....820) kOhm

Alarm delay : G3HC -> TvD = 2.5 * R58 +10 R58 = (TvD -10) * 0.4(R in kOhm, T in ms) G3HD -> TvD = 2.5 * R58 +10 R58 = (TvD -10) * 0.4

possible range: G3HC -> TvD -> (50....2000) ms R58 -> (15....820) kOhmG3HD -> TvD -> (50....2000) ms R58 -> (15....820) kOhm

Current limiting resistors: R55, R78, R79 ≥ Uk/2 (R55, R78, R79 in Ohm, terminal voltageUk in Volt)


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2.3.5 Command E N74 [ ]



Prolongation G3HC G3HDvariable ThE = 5 ms ThE = 20 ms CC CC [ ]

(R37 = 8k20) (R37 = 27k0)ThE = [ ............ ] ms ThE = [ ............ ] ms CC CC [ ]R37 = [ ............ ] kOhm R37 = [ ............ ] kOhm

fixed ThE = 20 ms ThE = 50 ms CD CD [ ]ThE = 100 ms ThE = 200 ms CE CE [ ]



delay TvE = 2 s TvE = 2 s [ ]R58 = 820 kOhm R58 = 820 kOhmSpecial: [ .......... ] ms Special: [ .......... ] ms [ ]R58 = [ .......... ] kOhm R58 = [ .......... ] kOhm




Prolongation for command E: G3HC -> ThE = 0.6 * R37 R37 = ThE * 1.7(R in kOhm, T in ms) G3HD -> ThE = 0.6 * R37 + 3 R37 = (ThE - 3) * 1.7

possible range: G3HC -> ThE -> ( 5....500) ms R37 -> (8.2....820) kOhmG3HD -> ThE -> (20....500) ms R37 -> ( 27....820) kOhm

Alarm delay : G3HC -> TvE = 2.5 * R58 +10 R58 = (TvE -10) * 0.4(R in kOhm, T in ms) G3HD -> TvE = 2.5 * R58 +10 R58 = (TvE -10) * 0.4

possible range: G3HC -> TvE -> (50....2000) ms R58 -> (15....820) kOhmG3HD -> TvE -> (50....2000) ms R58 -> (15....820) kOhm



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2.3.6 Command F N80 [ ]



Prolongation G3HC G3HDvariable ThF = 5 ms ThF = 20 ms CC CC [ ]

(R37 = 8k20) (R37 = 27k0)ThF = [ ............ ] ms ThF = [ ............ ] ms CC CC [ ]R37 = [ ............ ] kOhm R37 = [ ............ ] kOhm

fixed ThF = 20 ms ThF = 50 ms CD CD [ ]ThF = 100 ms ThF = 200 ms CE CE [ ]



delay TvF = 2 s TvF = 2 s [ ]R58 = 820 kOhm R58 = 820 kOhmSpecial: [ .......... ] ms Special: [ .......... ] ms [ ]R58 = [ .......... ] kOhm R58 = [ .......... ] kOhm




Prolongation for command F: G3HC -> ThF = 0.6 * R37 R37 = ThF * 1.7(R in kOhm, T in ms) G3HD -> ThF = 0.6 * R37 + 3 R37 = (ThF - 3) * 1.7

possible range: G3HC -> ThF -> ( 5....500) ms R37 -> (8.2....820) kOhmG3HD -> ThF -> (20....500) ms R37 -> ( 27....820) kOhm

Alarm delay : G3HC -> TvF = 2.5 * R58 +10 R58 = (TvF -10) * 0.4(R in kOhm, T in ms) G3HD -> TvF = 2.5 * R58 +10 R58 = (TvF -10) * 0.4

possible range: G3HC -> TvF -> (50....2000) ms R58 -> (15....820) kOhmG3HD -> TvF -> (50....2000) ms R58 -> (15....820) kOhm



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2.4 Alarm interface G3HE N28 [ ] N62 [ ]

2.4.1 Unblocking N28 N62

Extra delay TvU = 10 ms, R49 = 47k0 [ ] [ ]Special: [ ............ ] ms, R49 = [ ............ ] kOhm

Pulse duration ThU = 200 ms, R48 = 390k [ ] [ ]Special: [ ............ ] ms, R48 = [ ............ ] kOhm

UNBL prot. resistors R59 = 150 Ohm , R60 = 150 Ohm [ ] [ ]R59 = [ ............ ] Ohm, R60 = [ ............ ] Ohm

Extra unblocking delay: TvU = 0.23 * R49 R49 = TvU * 4.3Unblocking pulse duration: ThU = 0.42 * R48 + 50 - TvU R48 = (ThU - 50 + TvU) * 2.4(R in kOhm, T in ms)

possible range: TvU -> (1.0....40) ms R49 -> (4.7....180) kOhm for TvU = 10 ms ThU -> (50....390) ms R48 -> (22....820) kOhm

Current limiting resistors: R59, R60 ≥ Uk/2 (R59, R60 in Ohm, terminal voltage Uk in Volt)

2.4.2 Alarm (switch setting S1) S1 (N28) S1 (N62)

ON OFF ON OFF / (4) [ ] [ ] / (4) [ ] [ ]

Alarm relay delay [ .......... / .......... ] s | (3) [ ] [ ] | (3) [ ] [ ] \ (2) [ ] [ ] \ (2) [ ] [ ]

Not used (1) [ ] [X] (1) [ ] [X]

Jumper plugs: N28 N62

Supply monitoring supply unit 1, N1 EF [ ] [ ]supply units 1 and 2, N1 and N9 EE [ ] [ ]supply unit 2, N9 1) EF [ ] [ ]

Alarm output 1 contact closes in alarm state EB [ ] [ ]contact opens in alarm state EA [ ] [ ]

Alarm output 2 contact closes in alarm state ED [ ] [ ]contact opens in alarm state EC [ ] [ ]

1) With 2 individual supply units and G3HE in rack slot N62.

Alarm delay settings:000 -> 0.08s 100 -> 0.16s

S1 (4)(3)(2) = 010 -> 0.31s 110 -> 0.63 s001 -> 1.25 s 101 -> 2.5 s011 -> 5 s 111 -> 10 s

2.5 Trip counter G3HF N46 [ ] N80 [ ]

Jumper plugs: N46 N80

Battery ON FA [ ] [ ]OFF FB [ ] [ ]

NSD 70D

Utility Communication Systems Testing instructions

ABB Power Automation Ltd 1KHW000371 Language: EN G - 1Edition: 2000-07-27

G TESTING INSTRUCTIONS NSD 70D




C 1KHL016595Doc. Type: File No.:

214/18

Prepared:


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600545CE.doc

We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure tothird parties without express authority is strictly forbidden. © ABB Power Automation Ltd, Switzerland.

TESTING INSTRUCTION NSD 70D



N1...N80 position in the equipment rackP1...P18 position as given on the frontplate

U0 rated DC voltage for external terminals

T34-.. terminals going to the module at position N34T34/68-.. terminals going to the module at position N34 or N68

PGI/SI Programming Instructions (HENF 600544)/Setting Instruction (HE .............. )

[X] tested in the test bay

[ ............ ] nominal values or design settings( ............ ) values measured during testing

List of test equipment:

Standard equipment:

- Teleprotection terminal ABBor PC, Laptop

- Power supply unit 0...100 VDC General purpose

- Digital multi-meter 0...100 VDC Fluke 45or similar

- Oscilloscope BW ≥ 1 MHz Tektronix 2235or similar

Additional equipment:

- Storage oscilloscope Fs ≥ 1 Ms/s Tektronix 2430Aor similar

When using the F.O. interface G3HS following test equipment and optical fibres are needed:

- Optical power meter 1300 nm with adapter for FC/PC plugs- Variable optical attenuator (e.g. hp 8158B OPTICAL ATTENUATOR)- G3HS up to 5 km: optical fibre -> multimode 50/125u with FC/PC <=> ST plugs- G3HS up to 30 km: optical fibre -> singlemode 10/125u or multimode 50/125u with FC/PC <=>

FC/PC plugs

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Safety Instructions

DANGER Check the wiring of protective earth to the equipment.

Caution Check power supply polarity and voltage.

DANGER48 VDC and higher battery voltages are hazardous.Beware of electric shock.Do not make any installation under energized condition.

Measurements

Preparations:

- Switch off the battery supply and insert the NSD 70D units in the rack.- Connect the unit under test to the remote station: data terminals back-to-back or via the communication

channel (e.g. multiplexer of FOX family).- Switch on the auxiliary supply.

- When using the F.O. interface G3HS following measurements have to be performed:

G3HS up to 5 km (optical fibre -> multimode 50/125u with ST plugs):

Measure optical transmission power (OTX) (S1.3 on G3HS = ON) Popt (Tx) ≥ -24 dBm [ ]

Reduce the optical transmission level of the remote station by meansof an attenuator to Popt = -33 dBm (verify with optical power meter)and connect the signal to the receiver (ORX).

Alarm LED on G3HS goes out. [ ]

G3HS up to 30 km (optical fibre -> singlemode 10/125u or multimode 50/125u with FC/PC plugs):

Measure optical transmission power (OTX) (S1.3 on G3HS = ON)Transmission power coupled into singlemode fibre Popt (Tx) ≥ -20 dBm [ ]Transmission power coupled into multimode fibre Popt (Tx) ≥ -16 dBm [ ]

Reduce the optical transmission level of the remote station by meansof an attenuator to Popt = -40 dBm (verify with optical power meter)and connect the signal to the receiver (ORX).

Alarm LED on G3HS goes out. [ ]

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Remarks for T-operation

Normal T-operation:- Measure the transmission time and command prolongation: The T-ed-configuration has to be regarded as two individual links (outer station A <-> T-station and outer station B <-> T-station). The transmission time and command prolongation can now be measured as in case of a standard link. Pay attention to the fact, that in the T-station the command inputs and command outputs have to be connected in parallel at the isolating terminals.- Measure the transmission time from the outer station A to the outer station B according to 4.13 of this testing instruction.

Invers T-operation:- Measure the transmission time and command prolongation: The T-ed-configuration has to be regarded as two individual links (outer station A <-> T-station and outer station B <-> T-station). The transmission time and command prolongation can now be measured as in case of a standard link. Pay attention to the fact, that in the T-station the command inputs and command outputs have to be connected in parallel at the isolating terminals.- Measure the transmission time from the outer station A to the outer station B according to 4.13 of this testing instruction. For this measurement loop the command outputs (RX TRIP A ... C) to the command inputs (TX TRIP A ... C) in the T-station using the station battery or similar source as auxiliary supply.

- Adjust DC source for command injection:for Ubatt = 48 V...110 V: U0 = 48 Vfor Ubatt = 125 V...250 V: U0 = 100 V

1. Auxiliary supply voltages

1.1 G3HE (P14-P12) "24 V" [ 24.0 ± 1.0 VDC ] [ ]G3HE (P14-P13) " 5 V" [ 5.0 ± 0.2 VDC ] [ ]

2. LED signals, switch settings and firmware release on G3HP

2.1 Press the reset button "RES" (P9) on G3HP.

All LED's (P1...P7) on G3HP must light up for about 1 s. [ ]

2.2 Press button <SW> on pocket terminal:

Switch settings (S4....S7) on G3HP agree with thosein PGI/SI: 2.1.1...2.1.4 [ ]

Determine addresses according to switch settings if addressing is ON:

Address local station: (Address: ____________)

Address remote station: (Address: ____________)

2.3 Press button <VERS> on pocket terminal:

Read off firmware release ( ... FIRMWARE Rel __.__.__ __ )

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3. Command input operating levels

3.1 Command A TX TRIP(T34/68-5)-(T34/68-6) = U0Input current I0 = [ 3.5...5.0 ] mA [ ](T34/68-5)-(T34/68-6) = 0 V

3.2 Command B TX TRIP(T40/74-5)-(T40/74-6) = U0Input current I0 = [ 3.5...5.0 ] mA [ ](T40/74-5)-(T40/74-6) = 0 V

3.3 Command C TX TRIP(T46/80-5)-(T46/80-6) = U0Input current I0 = [ 3.5...5.0 ] mA [ ](T46/80-5)-(T46/80-6) = 0 V

3.4 Command D TX TRIP(T68-5)-(T68-6) = U0Input current I0 = [ 3.5...5.0 ] mA [ ](T68-5)-(T68-6) = 0 V

3.5 Command E TX TRIP(T74-5)-(T74-6) = U0Input current I0 = [ 3.5...5.0 ] mA [ ](T74-5)-(T74-6) = 0 V

3.6 Command F TX TRIP(T80-5)-(T80-6) = U0Input current I0 = [ 3.5...5.0 ] mA [ ](T80-5)-(T80-6) = 0 V

Command transmission tests

The following measurements check the pick-up and the command prolongation times on the relay inter-faces and the evaluation time on the DSP module. The received and transmitted trip counters on themodule G3HF (if fitted) and the internal trip counters (G3HP; status of the counters has to be read from thepocket terminal) can be checked simultaneously.

4. Transmission time and command prolongation

Notes: - Using the protection interface type G3HD instead of G3HC causes a5 ... 8 ms longer transmission time.

- The auxiliary output (AUX) of the interface G3HC can have an additionaldelay of up to 2.5 ms compared with the main command output.

- Using data interface G3HR with programmed transmission rate of56 kBit/s, maximum 1 ms longer times for T0 to occur (comparedwith the values given in the PGI/SI).

- In case the two NSD 70D terminals are not connected back-to-back,the delay of the communication link (e. g. PCM multiplexer) must beadded to the nominal transmission time T0.

- Using the protection interface type G3HC with programmed commandprolongation 5 ms, the tolerance to be used is (2 ... 10) ms.

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Reset the trip counters to 0: press button "RESET" (P14) on G3HF.

Transmit at least 5 commands as follows:Input voltage = U0 (command) for approx. 100 ms

0 V (pause between commands) for approx. 1 s

Measure the transmission time and command prolongation (trip extension).

Command A: Actuate TX TRIP (T34/68-5)-(T34/68-6) in the remote station.

4.1 RX TRIP (T34/68-7)-(T34/68-8)

Transmission time: [ ≤ T0 as in PGI/SI: 2.1.2 ] ( ............ ) ms

Command prolongation: [ as in PGI/SI: 2.3.1 ± 30% ] ( ............ ) ms

4.2 AUX (T34/68-3)-(T34/68-4)


Command B: Actuate TX TRIP (T40/74-5)-(T40/74-6) in the remote station.

4.3 RX TRIP (T40/74-7)-(T40/74-8)



4.4 AUX (T40/74-3)-(T40/74-4)


Command C: Actuate TX TRIP (T46/80-5)-(T46/80-6) in the remote station.

4.5 RX TRIP (T46/80-7)-(T48/80-8)



4.6 AUX (T46/80-3)-(T46/80-4)


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Command D: Actuate TX TRIP (T68-5)-(T68-6) in the remote station.

4.7 RX TRIP (T68-7)-(T68-8)



4.8 AUX (T68-3)-(T68-4)


Command E: Actuate TX TRIP (T74-5)-(T74-6) in the remote station.

4.9 RX TRIP (T74-7)-(T74-8)



4.10 AUX (T74-3)-(T74-4)


Command F: Actuate TX TRIP (T80-5)-(T80-6) in the remote station.

4.11 RX TRIP (T80-7)-(T80-8)



4.12 AUX (T80-3)-(T80-4)


4.13 Transmission time for T-operation (outer station A to outer station B)

Pay attention to the remarks regarding T-operation at section „Measurements“.

Command A: Actuate TX TRIP (T34/68-5)-(T34/68-6) in the remote outer station.

RX TRIP (T34/68-7)-(T34/68-8)

Transmission time: [ ≤ T0 as in PGI/SI: 2.1.2 ] 1 ( ............ ) ms

1 For inverse T-operation transmission time ≤ 2*T0 as in PGI/SI: 2.1.2

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Command B: Actuate TX TRIP (T40/74-5)-(T40/74-6) in the remote outer station.

RX TRIP (T40/74-7)-(T40/74-8)


Command C: Actuate TX TRIP (T46/80-5)-(T46/80-6) in the remote outer station.

RX TRIP (T46/80-7)-(T48/80-8)


5. Trip counters

Counter display G3HF:

5.1 Counter display: TRIP Tx A of remote station = TRIP Rx A of local station [ ]5.2 Counter display: TRIP Tx B of remote station = TRIP Rx B of local station [ ]5.3 Counter display: TRIP Tx D of remote station = TRIP Rx D of local station [ ]5.4 Counter display: TRIP Tx E of remote station = TRIP Rx E of local station [ ]

Status of internal counters DSP module (FW-Rel. 1.1.00 and higher):

Press buttons <OPT4> (Tx) and <OPT5> (Rx) on the pocket terminal repeatedly

5.5 Counter display: TRIP Tx A of remote station = TRIP Rx A of local station [ ]5.6 Counter display: TRIP Tx B of remote station = TRIP Rx B of local station [ ]5.7 Counter display: TRIP Tx C of remote station = TRIP Rx C of local station [ ]5.8 Counter display: TRIP Tx D of remote station = TRIP Rx D of local station [ ]5.9 Counter display: TRIP Tx E of remote station = TRIP Rx E of local station [ ]5.10 Counter display: TRIP Tx F of remote station = TRIP Rx F of local station [ ]

6. Unblocking

Interrupt the receiver signal(short-circuit receiver data signal).

Measure the duration of the unblocking impulse.

6.1 UNBLOCKING 1(T28/62-5)-(T28/62-6) Pulse duration: [ as in PGI/SI: 2.4.1 ± 50% ] [ ]

6.2 UNBLOCKING 2(T28/62-7)-(T28/62-8) Pulse duration: [ as in PGI/SI: 2.4.1 ± 50% ] [ ]

Re-establish the receiver signal.Press the reset button "RES" (P9) on G3HP.Wait until all alarm signals go out.

1 For inverse T-operation transmission time ≤ 2*T0 as in PGI/SI: 2.1.2

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7. Alarms

Interrupt the receiver signal.

7.1 LED's "AL" (P1), "RDY" (P3) and "SYN" (P6) light up. [ ]

Press button <ERR> on pocket terminal:Alarm message [ COMMOM ALARM ] [ ]

Press button <ERR> on pocket terminal:Alarm message [ RECEIVE SYNC ERROR ] [ ]

7.2 ALARM 1 (T28/62-1)-(T28/62-2) responds according to PGI/SI: 2.4.2 [ ]ALARM 2 (T28/62-3)-(T28/62-4) responds according to PGI/SI: 2.4.2 [ ]

Re-establish the receiver signal.Wait until all alarm signals go out.

8. Concluding work

- Reset the trip counters (G3HF).- Switch off the unit.- Switch off the stand-by battery for the trip counters, if the unit is

not going to be used immediately (insert jumper plug FB on G3HF).- Refit the screening covers; insert all modules.- Switch on the unit again.

9. Perform loop test

Press the test button "TST" (P8) on G3HP.

LED "RDY" (P3) ON [ ]LED "GRD" (P4) ON [ ]LED "TRP" (P5) ON for about 3 s [ ]

NSD 70D

Utility Communication Systems Commissioning instructions

ABB Power Automation Ltd 1KHW000371 Language: EN H - 1Edition: 2000-07-27

H COMMISSIONING INSTRUCTIONS NSD 70D


DANGERThe units G3HC, G3HD and G3HE must not be usedwith PCB extenders!

Hazardous voltage ! Beware of electric shock!



C 1KHL016595Doc. Type: File No.:

214/18

Prepared:


93-10-20Approved:


ENPage:

1/6


600546CE.doc

We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure tothird parties without express authority is strictly forbidden. © ABB Power Automation Ltd, Switzerland.

COMMISSIONING INSTRUCTION NSD 70D



N1...N80 position in the equipment rackP1...P18 position as given on the frontplate

T34-.. terminals going to the module at position N34T34/68-.. terminals going to the module at position N34 or N68

PGI/SI Programming Instructions (HENF 600544)/Setting Instruction (HE .............. )

[X] tested during commissioning

[ ............ ] nominal values or design settings( ............ ) values measured during testing

List of test equipment:

Standard equipment:

- Teleprotection terminal ABBor PC, Laptop

- Power supply unit 0...100 VDC General purposeor station battery voltage

- Digital multi-meter 0...100 VDC Fluke 45or similar

- Oscilloscope BW ≥ 1 MHz Tektronix 2235or similar

Additional equipment:

- Storage oscilloscope Fs ≥ 1 Ms/s Tektronix 2430Aor similar

When using the F.O. interface G3HS following test equipment is needed:

- Optical power meter wavelength 1300 nm

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1. Rack

1.1 Units fitted

SUPPLY G3HG N1 [ ] N9 [ ]SUPPLY G3HH N1 [ ] N9 [ ]SUPPLY G3HI N1 [ ] N9 [ ]SUPPLY G3HK N1 [ ] N9 [ ]SUPPLY G3HQ N1 [ ] N9 [ ]

DSP MODULE G3HP N17 [ ] N51 [ ]

PCM INTERFACE G3HM N21 [ ] N55 [ ]RS-422 INTERFACE G3HR N21 [ ] N55 [ ]F.O. INTERFACE G3HS N21 [ ] N55 [ ]

ALARM INTERFACE G3HE N28 [ ] N62 [ ]

RELAY INTERFACE G3HC N34 [ ] N68 [ ]N40 [ ] N74 [ ]N46 [ ] N80 [ ]

RELAY INTERFACE G3HD N34 [ ] N68 [ ]N40 [ ] N74 [ ]N46 [ ] N80 [ ]

TRIP COUNTER G3HF N46 [ ] N80 [ ]

1.2 Connecting cables

V9LF G.703 signals (G3HM) N21, X2 [ ] N51, X8 [ ]

V9MG RS-422 signals (G3HR / X.21) N21, X2 [ ] N51, X8 [ ]V9MH RS-422 signals (G3HR / RS-530) N21, X2 [ ] N51, X8 [ ]V9MI RS-422 signals (G3HR / RS-449) N21, X2 [ ] N51, X8 [ ]V9MK RS-422 signals (G3HR / isolating terminals) N21, X2 [ ] N51, X8 [ ]

V9FZ G3HS up to 30 km, LWL SM, FC/PC plugs N21 [ ] N51 [ ]V9GA G3HS up to 30 km, LWL SM, FC/PC plugs 1) N21 [ ] N51 [ ]V9GB G3HS up to 5 km, LWL MM, ST plugs N21 [ ] N51 [ ]V9GC G3HS up to 5 km, LWL MM, ST and FC/PC plugs N21 [ ] N51 [ ]V9GD G3HS up to 30 km, LWL MM, FC/PC plugs 1) N21 [ ] N51 [ ]V9LZ G3HS up to 5 km, LWL MM, ST plugs 1) N21 [ ] N51 [ ]

V9LE Alarms N28, X3 [ ] N62, X9 [ ]

V9LE Command A N34, X4 [ ]V9LE Command B N40, X5 [ ]V9LE Command C N46, X6 [ ]V9LE Command D N68, X10 [ ]V9LE Command E N74, X11 [ ]V9LE Command F N80, X12 [ ]1) These fibre optic cabels are normally equipped with the described plugs at one end only.

At the other end customer specific plugs may be fixed on request.

1.3 Auxiliary supply

AC supply ( ............ ) VACBattery ( ............ ) VDC

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2. Safety Instructions

DANGER Check the wiring of protective earth to the equipment.

Caution Check power supply polarity and voltage.

DANGER48 VDC and higher battery voltages are hazardous.Beware of electric shock.Do not make any installation under energized condition.

3. Measurements

Preparations

- Switch off the auxiliary supplies at the main switches at the rear of the rack.- Switch on the stand-by battery for the trip counters on G3HF (insert jumper plug FA).- Insert all the NSD 70D units into the rack.- Open the isolating terminals in local and remote stations.- Loop the command outputs (RX TRIP A ... F) to the command inputs (TX TRIP A ... F) in the

remote station using the station battery or similar source as auxiliary supply.- Switch on the equipment.

- Check the automatic identification of the data interface (G3HM, G3HR or G3HS)and the transmission rate (56 kB/s or 64 kB/s):

Press button <BW> on the pocket terminalInterface type and transmission rate agree with those in PGI/SI: 2.2 [ ]

- When using the F.O. interface G3HS following measurements have to be performed:

G3HS up to 5 km measure optical power received -33 dBm ≤ Popt(Rx) ≤ -18 dBm [ ]G3HS up to 30 km measure optical power received -40 dBm ≤ Popt(Rx) ≤ -20 dBm [ ]

Remarks for T-operation

Normal T-operation:- Measure the transmission time: The T-ed-configuration has to be regarded as two individual links (outer station A <-> T-station and outer station B <-> T-station). The transmission time can now be measured as in case of a standard link. Loop the command outputs to the command inputs in both outer stations using the station battery or similar source as auxiliary supply. Pay attention to the fact, that in the T-station the command inputs and command outputs have to be connected in parallel at the isolating terminals.- Measure the transmission time from the outer station A to the outer station B according to 3.6 of this commissioning instruction.

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Inverse T-operation:- Measure the transmission time: The T-ed-configuration has to be regarded as two individual links (outer station A <-> T-station and outer station B <-> T-station). The transmission time can now be measured as in case of a standard link. Loop the command outputs to the command inputs in both outer stations using the station battery or similar source as auxiliary supply. Pay attention to the fact, that in the T-station the command inputs and command outputs have to be connected in parallel at the isolating terminals.- Measure the transmission time from the outer station A to the outer station B according to 3.6 of this commissioning instruction. For this measurement loop the command outputs to the command inputs in the T-station using the station battery or similar source as auxiliary supply.

3.1 Auxiliary supplies

G3HE (P14-P12) "24 V" [ 24.0 ± 1.0 VDC ] [ ]G3HE (P14-P13) " 5 V" [ 5.0 ± 0.2 VDC ] [ ]

3.2 LED signals on G3HP

Press the reset button "RES" (P9) on G3HP.

All LED's (P1...P7) on G3HP must light up for about 1 s. [ ]

3.3 Device addressing

Press button <SW> on pocket terminal:

Deftermine addresses according to switch settings if addressing is ON.

Address local station: (Address: __________)

Address remote station: (Address: __________)

3.4 Firmware release

Press button <VERS> on pocket terminal:

Read off firmware release (… FIRMWARE Rel _._.__)

3.5 Transmission time

- Reset the trip counters to 0: press button "RESET" (P14) on G3HF.

- Transmit a few commands as follows:Input voltage = command DC voltage for about 100 ms

0 V (pause between commands) for at least 1 s

- Measure the actual transmission time of the looped command.

Note: The times measured are the loop times there and back.The time for one direction which must be inserted below is thus halfthe measured loop time.Two times the nominal transmission time T0 as measured in thesystem test report may serve as a reference for the upper limit.This note is also valid for the measurements at section 3.6.

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Command A: Actuate TX TRIP (T34/68-5)-(T34/68-6).

3.5.1 RX TRIP (T34/68-7)-(T34/68-8) Transmission time: ( ............ ) ms

Command B: Actuate TX TRIP (T40/74-5)-(T40/74-6).


Command C: Actuate TX TRIP (T46/80-5)-(T46/80-6).


Command D: Actuate TX TRIP (T68-5)-(T68-6).

3.5.4 RX TRIP (T68-7)-(T68-8) Transmission time: ( ............ ) ms

Command E: Actuate TX TRIP (T74-5)-(T74-6).


Command F: Actuate TX TRIP (T80-5)-(T80-6).


3.6 Transmission time for T-operation (outer station A to outer station B):

Pay attention to the remarks regarding T-operation at section „3. Measurements“.

Command A: Actuate TX TRIP (T34/68-5)-(T34/68-6).


Command B: Actuate TX TRIP (T40/74-5)-(T40/74-6).


Command C: Actuate TX TRIP (T46/80-5)-(T46/80-6).


3.7 Trip counters

Counter display G3HF:

3.7.1 Counter display: TRIP Tx A = TRIP Rx A [ ]3.7.2 Counter display: TRIP Tx B = TRIP Rx B [ ]3.7.3 Counter display: TRIP Tx D = TRIP Rx D [ ]3.7.4 Counter display: TRIP Tx E = TRIP Rx E [ ]

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Status of internal counters DSP module (FW-Rel. 1.1.00 and higher):

Press buttons <OPT4> (Tx) and <OPT5> (Rx) on the pocket terminal repeatedly

3.7.5 Counter display: TRIP Tx A = TRIP Rx A [ ]3.7.6 Counter display: TRIP Tx B = TRIP Rx B [ ]3.7.7 Counter display: TRIP Tx C = TRIP Rx C [ ]3.7.8 Counter display: TRIP Tx D = TRIP Rx D [ ]3.7.9 Counter display: TRIP Tx E = TRIP Rx E [ ]3.7.10 Counter display: TRIP Tx F = TRIP Rx F [ ]

3.8 Concluding work

- Reset the trip counters in both stations.- Remove the command output to input loop in the remote station.- Close the isolating terminals in local and remote station.- Press the reset button "RES" (P9) on G3HP.- Wait until all alarm signals go out.

3.9 Perform loop test

Press the test button "TST" (P8) on G3HP.

3.9.1 LED "RDY" (P3) ON [ ]3.9.2 LED "GRD" (P4) ON [ ]3.9.3 LED "TRP" (P5) ON for about 3 s [ ]

NSD 70D

Utility Communication Systems Dimension drawing rack G7BGa

ABB Power Automation Ltd 1KHW000371 Language: EN I - 1Edition: 2000-07-27

I DIMENSION DRAWING RACK G7BGa

NSD 70D

Utility Communication Systems Equipment view

ABB Power Automation Ltd 1KHW000371 Language: EN K -1Edition: 2000-07-27

K EQUIPMENT VIEW

Front view: 2 NSD 70D with 2 commands and 2 trip counters; redundant supplies; blanking plate (1U)with labelling strip; pocket terminal

Rear view: Connecting cables for 2 NSD 70D with one command each; cable duct

manual nsd70d

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