KITZ 101, 102, 103Interface Units

Figure 1: KITZ Interface Unit

Features

Enables K-Bus to be interfacedwith IEC870 communications links

Provides for remote relaycommunications via modems

Optionally adds a real time tag torelay reply messages

Allows synchronisation of real timeclock via the communications link

Desk top or back of panelmounting

Provides visual indication ofcommunication operation on eachport

Suitable for electrically hostileenvironments

KITZ 103 enables Optimho (LFZP)distance relays to be interfacedonto K-Bus

Introduction

The KITZ interface units provideprotocol conversion between K-Bus,the communication medium forCourier compatible devices, andIEC870 frame format data. It providesa serial connection (RS232/IEC870)which enables a master station(typically a personal computer)running Courier software tocommunicate with slave devices.The KITZ can be used to implement anintegrated protection and controlsystem utilising the serialcommunications facility of relays.

Courier, the communication languagefor GEC ALSTHOM relays, providesaccess to relay menus allowing theuser to read, change and controlrelay functions. Courier is based on amaster-slave system whereby relays

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only respond when requested to do soby the master PC. All information isstored in the relays to form adistributed database which, combinedwith the generic nature of Courier,provides for ongoing relaydevelopments without the need forsoftware updates.

Devices are linked using K-Bus whichconsists of a screened twisted pair ofwires, an arrangement developed forcommunicating in electrically hostileenvironments. Up to 32 devices canbe connected in parallel on a singlespur up to a maximum length of 1 km.

Models Available

KITZ 101

Interface unit suitable for desk topmounting with ac auxiliary supply.

KITZ 102

Interface unit suitable for back ofpanel mounting with ac or dcauxiliary supply.

KITZ 103

Offers protocol conversion between K-Bus and Optimho (Opticom) enablingintegration of Optimho relays onto K-Bus. The KITZ 103 is suitable for backof panel mounting with ac or dcauxiliary supply.

Application

KITZ 101/102

The KITZ 101/102 interface unitfacilitates communications betweenK-Bus which links Courier compatibledevices and the serial port of a PC.Alternatively the KITZ 101/102 maybe connected via modems and atelephone network for remote accessto devices. The KITZ 101/102 mayalso be used for interfacing K-Bus withremote terminal units (RTUs) formingpart of Supervisory Control and DataAcquisition (SCADA) systems havingCourier language capability.

The KITZ 101/102 interface unitoffers protocol conversion betweenK-Bus and IEC870 formats, and willtypically be applied in substationswhere a number of K-Bus compatiblerelays are operating. This providesaccess to all of the functions ofconnected relays from a masterstation, such as a PC. Relay settingchanges, configuration, disturbanceand event records and remote circuitbreaker operations are functionsavailable using K-Bus.

It should be noted that protectiontripping and blocking signals are not

Figure 2: Typical application of KITZ 101 in

K Range relays

Remote Terminal Unit(RTU)

routed via the K-Bus and KITZinterface units. Separate conventionalwiring is used for these functions.Remote tripping and closing signals,where available as part of integratedcontrol systems, are transmitted viaK-Bus and KITZ.

Typical applications are shown inFigures 2 and 3.

The KITZ 101/102 interface unitprovides protocol conversion whichallows for relay communications withSCADA systems. Intelligent SCADAsystems capable of protocolconversion may communicate withrelays using Courier language via theKITZ 101/102 connected to anRS232 port of a substation RTU.Subject to the capabilities of theSCADA system, all relay functions canbe accessed via the KITZ 101/102.

KITZ 101/102 application with aSCADA system is shown in Figure 2below.

SCADA systems unable tocommunicate using Courier languagerequire an additional protocolconverter between the substation RTUand the KITZ 101/102 interface unit.

terface unit.

KBUS1

2

K-Busto terminals 1 & 2

screen to

K-Bus

KITZ 101

KITZ 103

The KITZ 103 enables the Optimho(LFZP) distance protection relay to beinterfaced onto K-Bus. The unitprovides a partial Courier interfaceenabling particular information fromthe Optimho relay to be accessed, ina similar manner to K-Series relays.Additionally, the unit providesprotocol conversion of Opticommessages, enabling remotecommunication with the relay overK-Bus using a modified version of theOpticom communication softwarepackage.

Typical application of the KITZ 103 isshown in Figure 4.

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RS232/IEC 870

Mains cable

KBUS1

Detail of earth link& external resistor when fitted

2

Figure 3: Typical application of KITZ 102 interface unit.

PC

K Range relays

RS232/IEC 870

K-Bus

KITZ 102

Modem

Telephone network

Auxiliary supply

KBUS

IEC870

OPTIONS

KBUS TO IEC 870 IN

TERFACE

KITZ101

RxTx

RxTx 01234567

1

0

Modem

Functions

KITZ 101/102

Protocol ConversionThe KITZ interface unit’s main functionis to convert between K-Bus messagedata and IEC870 format forcommunications with a PC.Modem Interface

For applications where a masterstation is located remotely from thedevices, communication between themaster station and KITZ 101/102may be established via the telephonenetwork and modems.The KITZ 101/102 may beconfigured to support modemcommunications

Real Time Clock (RTC)

The KITZ 101/102 provides optionaldate and time tagging to receivedK-Bus messages. When activated, theKITZ 101/102 appends an IEC870format date and time tag to receivedK-Bus messages containing anunsynchronised millisecond timercount. This allows accurate sequenceof events to be established despitepossible transmission delays on theIEC870 network. The real time clockis backed up by an internal battery.

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KITZ 103

The function of the KITZ 103 isdifferent to that of the KITZ 101/102.

The KITZ 103 provides a partialCourier interface for the Optimhorelay, enabling certain informationfrom the relay to be accessed in asimilar manner to that of the K-Seriesrelays. The information includes faultrecords, measurement values and theability to change the relay activesettings group. The KITZ 103 unitautomatically logs on to the Optimhorelay it is connected to on startup, andremains logged on in order to detectand extract new fault records and toextract measurement values. The unitcan be logged off by the user throughthe Courier interface, or by pressingthe RESET button on the relay frontpanel. The unit automaticallygenerates a Courier event, which canbe displayed on the PC, when a newfault record is extracted. The event iscreated using the time/date anddescription of the extracted fault.

The KITZ 103 also acts as a protocolconverter, automatically convertingmessages containing an Opticomidentifier. Note that the Opticomidentifier is automatically added tomessages transmitted from the PCusing Opticom 100 version 5.00 orOpticom 140 version 3.00 and later.This feature therefore provides accessto the relay over K-Bus via theOpticom communication software,including the ability to change relaysettings

Figure 4: Typical application of KITZ 103 interface unit

Auxiliary supply

RS232/IEC 870

PC

K Range relays (when fitted)

Auxiliary supply

KBUS1

2

KBUS1

2

KITZ 102

KITZ 103

Optimho (LFZP)

RS232

K-Bus

Hardware Description

The KITZ interface unit is housed in acase of dimensions 57.5mm x 163 mmx 216 mm deep, available as desktop model KITZ 101 or back of panelmounted as KITZ 102.

A 16 bit microprocessor controls thesoftware and communicationsfunctions of the KITZ.The communications functions areperformed by a SerialCommunications Controller (SCC).The KITZ contains two channels, aK-Bus channel and an RS232/IEC870channel, each able to receive andtransmit via their respectivecommunications port. An RS232 portand K-Bus terminals are located on therear panel.

User Interface

Front Panel User Interface

The front plate contains 5 LEDs toindicate ‘power on’, as well as‘transmit’ and ’receive’ status of boththe K-bus and the RS232/IEC870channels. Eight option switches forlocal configuration of the KITZ arealso located on the front plate.

Communications Protocol

Courier Access Software is providedwith the KITZ 101/102 to allowaccess to the relays to read andchange settings. Additional softwareentitled Protection Access Softwareand Toolkit (PAS&T) which providesaccess to disturbance and eventrecords, as well as some additionalrelay functions, is also available.Alternatively the CourierCommunications application guidedefines Courier communicationssufficiently to allow software to bewritten for specific applications,typically for communications usingexisting SCADA systems.

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Technical Data

Ratings

Auxiliary supplyNominal (V) Operative Range (V)

KITZ 101110V/230V ac 87 – 265V ac 50/60Hz

KITZ 102/10324/125V ac/dc 19 – 150V dc

50 – 133V ac 50/60Hz48/250V ac/dc 33 – 300V dc

87 – 265V ac 50/60Hz

Burdens

Auxiliary supply

KITZ 101 ac <5VA

KITZ 102/103 ac <5VA

dc <3W

Communication ports

K-Bus port

Language: Courier

Transmission mode: Synchronous

Signal level RS485

Transmission coding: FM0 (Bi Phase space)

Frame Format: HDLC

Data rate: 64k/bit per second

K-Bus cable: Screened twisted pair

K-Bus cable length: 1000m of cable (maximum)

K-Bus Loading: 32 units (multi-drop system)

Isolation: 2kV rms for one minute

Termination resistor 150Ω

RS232/ port frame format

Language: Courier

Transmission: Asynchronous – RS232 voltage levels

Transmission coding: NRZ

Frame format (switch 3 = position 0): Asynchronous – 11 bit(1 start bit, 8 data bits, 1 parity (even)1 stop bit)

Frame format (switch 3 = position 1): Asynchronous – 10 bit*(1 start bit, 8 data bits, no parity,1 stop bit)

*Note: The use of the 10 bit frame format will result in a less securecommunications protocol which does not meet IEC 870-5FT1.2requirements.

Data rate: 1200 to 57600* bits per second

RS232 cable: RS232 serial interface lead

RS232 cable length: 15m of cable (maximum)(or 2500pF total cable capacitance)

RS232 Loading: 2 units (point to point system)

*Note: Optimho data limited to 4800 bits per second.

High voltage withstand

Dielectric withstandIEC 255-5: 1977 2kV rms for 1 minute between the

auxiliary suppy terminals and theK-Bus terminals connected togetherand case earth.

2kV rms for 1 minute between theauxiliary supply terminals connectedtogether and the K-Bus terminalsconnected together.

High voltage impulseIEC 255-5: 1977 Three positive and three negative

impulses 5kV peak, 1.2/50µs, 0.5Jbetween all independent circuits andbetween all terminals and theprotective earth terminal.

Electrical environment

DC supply interruption (KITZ102 only)IEC 255-11: 1979 The unit will withstand a 10ms

interruption in the auxiliary supply,under normal operating conditions,without de-energising.

High frequency disturbanceIEC 255-22-1: 1988 Class III 2.5kV peak between independent

circuits and case.

1.0kV peak across terminals of thesame circuit.

Electrostatic dischargeIEC 255-22-2: 1989 Class III 8.0kV –discharge in air.

IEC 801-2: 1991 Level 2 (4.0kV) – point contactdischarge.

No additional tolerances are requiredfor the operating time or the unit’sthresholds.

Fast transient disturbanceIEC 255-22-4: 1992 Class III 2.0kV, 5kHz applied directly to

auxiliary supply and K-Buscommunications port.

IEC 801-4: 1988 Level 3 (2.0kV, 5kHz) applied directlyto all inputs.

EMC compliance89/336/EEC Compliance to the European

Commission Directive on EMC isclaimed via the TechnicalConstruction File route.

EN 50081-2: 1994 Generic Standards were used toEN 50082-2: 1995 establish conformity.

Product safety73/23/EEC Compliance with the European

Commission Low Voltage Directive.

EN 61010-1: 1993/A2: 1995 Compliance is demonstrated byEN 60950: 1992/A3: 1995 reference to generic safety standards.

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Atmospheric environment

TemperatureIEC 255-6: 1988 Storage and transit –25°C to +70°C

Operating –25°C to +55°C

IEC 68-2-1: 1990 Cold

IEC 68-2-2: 1974 Dry heat

HumidityIEC 68-2-3: 1969 56 days at 93% RH and +40°C

Enclosure protectionIEC 259: 1989 IP20

Mechanical environment

VibrationIEC 255-21-1: 1988 Response Class I

Endurance Class I

Shock and bumpIEC 255-21-2: 1988 Shock response Class I

Shock withstand Class I

Bump Class I

SeismicIEC 255-21-3: 1993 Class I

Case

KITZ 101 – Desk top mounting

KITZ 102 – Back of panel mounting

KITZ 103 – Back of panel mounting

Case dimensions are shown in figures 5 and 6.

Additional Information

KITZ 101, 102 Service Manual R8521

KITZ 103 Service Manual R8532

Optimho Service Manual R5911 – R5915

Courier Communications ApplicationGuide R6509 – R6513

Courier Communications forIntegrated Protection & Control Systems R4113

Figure 5: Case outline for KITZ 101.

Figure 6: Case outline for KITZ 102/103.

216.0

205.0

65.5 57.5

Rubber mounting feet

163.0

SWK-

Bus

12

No

VxV-

57.5

216.0

205.0

179.0

181.0 174.0

4 off mounting lugs

163.0

4 (Typ)

SWK-

Bus

12

No

Vx

V

AU

XILI

ARY

SU

PPLY

VO

LTA

GE

Link not fitted on KITZ 103

9

10

Unit type: K I T Z

K-Bus/IEC870 interface - desktopK-Bus/IEC870 interface - back of panelK-Bus/Optimho interface

Software:Standard

Case size:Standard

Mounting:Desktop (KITZ 101 only)Back of panel (KITZ 102, 103 only)

Auxiliary voltage:24/125V ac/dc (not available KITZ 101)48/250V ac/dc (ac only KITZ 101)

25

XY

X

0 1

1 0 11 0 21 0 3

A E A

Order Details

Glossary

Courier A communication languagedeveloped to provide generic control,monitoring, data extraction andsetting changes on remote devices(primarily protective relays) within thesubstation environment.

K-Bus The 64 kbps twisted pair cable usedto connect relays and transfer Courierdata.

PAS&T An abbreviation for Protection AccessSoftware and Toolkit which is PCbased software used to access relayfunctions using Couriercommunications.

KITZ The interface unit which convertsbetween K-Bus and RS232/IEC870format data.

IEC870 An abbreviated term for thecommunication standard IEC870-5FT1.2 which is used to transferCourier data over modems andRS232 connections.

Optimho GEC ALSTHOM distance protectionrelay, also designated LFZP.

Opticom The software package used tocommunicate with Optimho relays.

RS232/IEC870 Port Refers generally to the serial port ofthe KITZ 101/102/103 interface unit,however, IEC870 frame format of theserial port data is only availableselectively on the KITZ 101/102 unit.

Relay/Device The terms “relay” and “device” referto K-Bus Courier communicatiingdevices such as protection relays,input/output devices, measurementcentres or similar.

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