er csc150 manual

CSC-150 Numerical Busbar Protection

Equipment Manual

CAUTION

1) This manual applies only to CSC-150.

2) Please read the manual and the specification of the installation, adjustment,

testing, operation and maintenance carefully.

3) To prevent damage to equipment, don’t plug-hot-plug any moduel of the

equipment and touch the chips and components in printed circuit board.

4) Please use the eligible testing equipments and devices to test and detect

the CSC-150 protection equipment.

5) If any abnormity occurred in the equipment or unusual maintenance is

needed, please promptly contact with the agents or our service hotline.

6) The operation password is: 8888.

WARNING

1) During operation of electrical equipment, certain parts of this equipment

are under high voltage. Improper behavior could result in severe personal

injury or significant equipment damage.

2) Only qualified personnel can work on this equipment or in vicinity of the

equipment. These persons should be familiar with warning & service

procedure described in this manual, as well as with safety regulations.

3) Prerequisites to proper & safety operation of the equipment are proper

storage, setup, installation, operation & maintenance of the equipment.

4) In particularly cases, the general rules & safety regulations according to

relating standards (e.g. IEC, National standards or other International

standards) for work with high voltage equipment should be observed.

COPYRIGHT

All rights reserved.

Registered trademark

® are registered trademark of Beijing Sifang Automation Co., Ltd..

CONTENTS

1 Introduction ..................................................................................................................... 1

1.1 Application................................................................................................................... 1

1.2 Features........................................................................................................................ 1

1.3 Functions ..................................................................................................................... 3

2 Design .............................................................................................................................. 4

2.1 Mechanical structure .................................................................................................. 4

2.2 Dimensions .................................................................................................................. 5

3 Technical data ................................................................................................................. 7

3.1 General data................................................................................................................. 7

3.2 Function data............................................................................................................. 11

4 Hardware functions ...................................................................................................... 12

4.1 Hardware arrangements ........................................................................................... 12

4.2 Operations of complete units .................................................................................. 12

4.3 Equipment connection and terminal illustration ................................................... 14

4.3.1 Layout of rear panel terminals................................................................................. 14

4.3.2 Illustration of equipment terminal ........................................................................... 14

5 Protection functions..................................................................................................... 21

5.1 Operation of complete unit ...................................................................................... 21

5.2 Differential current protection unit.......................................................................... 24

5.2.1 Basic principle........................................................................................................... 24

5.2.2 Algorithm with instantaneous values ..................................................................... 26

5.2.3 Summary of the measuring method........................................................................ 27

5.2.4 Adjustment of the current transformer ratios........................................................ 28

5.2.5 Isolator replica........................................................................................................... 29

5.2.6 Circuit breaker status ............................................................................................... 30

5.2.7 Bus coupler variants................................................................................................. 31

5.2.8 Double busbar configuration................................................................................... 34

5.2.9 Single busbar with a bus coupler arrangement..................................................... 40

5.2.10 Single busbar arrangement.................................................................................. 42

5.2.11 One and a half circuit breaker arrangement....................................................... 43

5.3 Circuit-breaker Failure protection unit ................................................................... 45

5.3.1 Circuit-breaker failure protection during a feeder/transformer short-circuit ..... 45

5.3.2 Circuit-breaker failure protection for busbar faults .............................................. 47

5.4 Bus coupler circuit breaker failure unit.................................................................. 48

5.5 Protection in the “dead zone” of the bus coupler unit ......................................... 49

5.6 Overcurrent protection of the bus coupler ............................................................ 51

5.7 Monitoring functions ................................................................................................ 51

5.7.1 CT Saturation ............................................................................................................. 51

5.7.2 CT open circuit .......................................................................................................... 52

5.7.3 VT open circuit .......................................................................................................... 54

6 Operation ....................................................................................................................... 55

6.1 Safety precautions .................................................................................................... 55

6.2 Dialog with the equipment ....................................................................................... 55

6.2.1 Menu frame ................................................................................................................ 55

6.2.2 Display flowing.......................................................................................................... 60

6.3 Setting the functional parameters........................................................................... 61

6.3.1 Setting illustration..................................................................................................... 61

6.3.2 The setting lists of Model 1 (V2.00 and above) ...................................................... 63



6.4 Annunciations ........................................................................................................... 79

7 Installation and commissioning.................................................................................. 85

7.1 Unpacking & repacking ............................................................................................ 85

7.2 Mounting .................................................................................................................... 85

7.3 Check before power on ............................................................................................ 85

7.4 Check with power on ................................................................................................ 86

7.5 Configuration of functions....................................................................................... 86

7.5.1 Observing after power on......................................................................................... 86

7.5.2 Operation introduction ............................................................................................. 90

7.5.3 Setting down the equipment parameters ............................................................... 90

7.5.4 Equipment setup ....................................................................................................... 90

7.6 Testing and commissioning..................................................................................... 90

7.6.1 Inspecting the version and the CRC of software................................................... 90

7.6.2 Setting down protection settings and switching setting group .......................... 90

7.6.3 Digital inputs test ...................................................................................................... 91

7.6.4 Digital output Test ..................................................................................................... 91

7.6.5 Inspecting A/D conversion....................................................................................... 97

7.6.6 The simulation test of short circuit fault for Model 1............................................ 97

7.6.7 The simulation test of short circuit fault for Model 2..........................................104

7.6.8 The simulation test of short circuit fault for Model 3.......................................... 111

7.7 Switch the protection into service ........................................................................ 119

7.7.1 The preparation before switching the protection into service........................... 119

7.7.2 The check items when with load ........................................................................... 119

8 Maintenance ................................................................................................................120

8.1 Routine checks........................................................................................................120

8.2 Fault tracing.............................................................................................................120

8.3 Repairs .......................................................................ERROR! BOOKMARK NOT DEFINED.

9 Storage and Transport................................................................................................121

10 Selection and ordering data ......................................................................................122

11 Appendix......................................................................................................................123

11.1 Hardware structure of CSC-150 Model 1, Model 2 and Model 3.........................123

11.2 The rear view of the equipment rear panel...........................................................126

11.3 The front view of 8U protection box......................................................................127

11.4 The rear panel terminal diagram of CSC-150 for Model 1...................................128



CSC-150 Numerical Busbar Protection Equipment Manual

-1-

1 Introduction

1.1 Application

CSC-150 numerical busbar protection equipment applies to 750 kV and below various voltage

levels busbar system, including single busbar, single busbar with a bus coupler, main busbar

and transfer busbar, double busbars, one and half breaker, 1 main + 1 main / 1 transfer busbar,

main double and a transfer busbar arrangements. There are three models of software, Model 1,

Model 2 and Model 3. Model 1 is applicable to single busbar with a bus coupler, single busbar,

one and half CB arrangements. Model 2 is applicable to double busbar, main busbar and

transfer busbar, 1 main + 1 main / 1 transfer busbar arrangements. Model 3 is applicable to two

main & one transfer bus scheme configuration in which the CTs of feeders are near to line side.

For Model 1 and Model 2, the equipment is of 20 bays in maximum, including one bus coupler

and 19 feeders. For Model 3, the equipment is of 18 bays in maximum, including one bus

coupler, one transfer bus coupler and 16 feeders.

1.2 Features

The equipment has characteristics as follows:

The microprocessor combined 32 bits DSP with MCU, high performance hardware

systems ensures the parallel real-time calculation in all components of the equipment.

Large capacity disturbance fault record can keep many times fault data which is recorded

in the whole process. Complete event-recording and operation log can keep thousands of

event reports and operation logs, and data will not lose when power is off.

Internal module was intelligently designed so that a comprehensive real-time

self-inspection can be carried out. Double A/D sampling in analog acquisition circuit

performs real time self-testing for each other. New method is applied for digital input circuit

test. Digital input status is sampled time-synchronized through two line optical intervals

and judged. Output voltage at each level of power module is real-time monitored.

The LCD could real time display information such as busbar arrangement, differential and

restraining currents, setting group and so on, which can be configured according to

custom’s requirement. The operation menu is simple and convenient for use, which

endows operation personnel and protection engineer with different rights in order to insure


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security. The equipment provides four shortcut keys which could realize “one-key”

operation and facilitate operation of operation personnel in local. The panel of the

equipment applies arc surface structure which is integratively designed, exactly founded

and molded for once, and it has the characteristic of beautiful sculpt, high precision, low

cost, convenient installation and so on.

The product can record protection operating process, logic flow and varied calculation

values that can be analyzed in whole process by analyzing software CSPC developed by

us.

The equipment provides convenient automatic testing scheme in field, it can achieve a

comprehensive, perfect test.

2-channel high speed reliable electric Ethernet ports (optional optical fiber Ethernet ports),

2-channel LonWorks ports, RS-485 port and series printing port are provided; the user can

select any of these according to the requirements. The protocol supports IEC60870-5-103,

IEC61850 or CSC-2000 of Sifang Company, easy to interface with substation automation

system and protection management information system.

It applies fire-new inserting-and-pulling from front combined structure. Strong current

circuit and weak current circuit are separated. Weak current circuit applies backboard

general bus mode and the lines of strong current circuit goes out from modules directly.

These characteristic increases reliance and anti-jamming preference of the hardware and

anti-jamming mould needn’t add in addition.

It applies the combination of parallel identification and harmonious wave restraint principle

based on synchro element combination to detect CT saturation precisely and operates

rapidly when transient fault occurs.

Accord the normally open and normally close contacts of isolator replica to ensure buses

running mode.

The CT transformer ratio of busbar protection is different because the load condition of the

lines connected with the busbar is different. For different CT transformer ratio, the

equipment adjusts the CT transformer ratio of all feeders automatically, making the

secondary current fulfill Kirchoff’s current law. Customer only needs to set all actual CT

transformer ratios. In order to insure precision, the CT transformer ratio difference of each

linking unit shouldn’t be more than 4 times.


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1.3 Functions

The protection has these functions as follows:

Fast virtual phase-comparison current startup protection

Percentage biased current differential protection

Circuit-breaker failure protection (CBF)

Bus coupler circuit-breaker failure protection (B/C CBF) and the dead zone fault protection

Bus coupler over current protection (B/C O/C)


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2 Design

2.1 Mechanical structure

The enclosure for equipment includes two boxes, one is 19 inches in width and 4U in height

and the other is 19 inches in width and 8U in height according to IEC 60297-3.

The equipments are flush mounting with panel cutout and cabinet mounting.

Connection terminals to other system on the rear.

The front panels of equipments are aluminum alloy by founding in integer and overturn

downwards. LCD, LEDs and setting keys are mounted on the panel. There is a serial

interface on the panel suitable for connecting with a PC.

Draw-out modules for serviceability are fixed by lock component.

The modules can be combined through the bus on the rear board. Both the equipments

and the other system can be combined through the rear interfaces.


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Fig.1 CSC-150 protection equipments view

2.2 Dimensions

Dimension drawings for CSC-150 are shown in Fig 2.


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Fig. 2(a) Flush-Mounted enclosure for the 4U box of CSC-150 with panel cutout

(Dimensions in mm)

F2F1 F4F3 -+ SI O

QU IT S ET

Fig. 2(b) Flush-Mounted enclosure for the 8U box of CSC-150 with panel cutout

(Dimensions in mm)


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3 Technical data

3.1 General data

Analog Input Circuits IEC 60255-6

Rated current In = 1A or 5A

Rated Voltage Un = 63.5 Ph-N or 110V Ph-Ph

Rated Frequency Fn = 50 Hz

Power Consumption IEC 60255-6

CT circuit at In = 1A < 0.5 VA

At In = 5A < 0.5 VA

PT circuit at Un =110V < 1 VA

Thermal Overload Capability IEC 60255-6

CT circuit, Continuous 2 x In

For 10s 10 x In

For 1s 80 x In

PT Circuit, Continuous 1.2 x Un

For 10s 1.4 x Un

Auxiliary DC Voltage IEC 60255-6

Rated auxiliary voltage 110V DC or 220V DC

Operating range -20 % to +10 %

Permissible tolerance of the

Rated auxiliary voltage -30% to +14%

Ripple content 12%

Bridging time during auxiliary

Voltage failure 50ms

Restart time approx. 400ms

Power Consumption

At quiescent state Max 30W

At energized state Max 50W


-8-

Switching Capacity:

Make & Carry 5A continuously

30A for 1s

30A for 0.2s with L/R ≤10 ms

Break For L/R ≤ 40ms: 30W

Switching Current 5A (AC/DC)

Voltage 250V (AC), 30V (DC)

Power 1250 VA (AC), 150W (DC)

Maximum Nos. of operations

(Durability) ≤ 1,00,000 times

Display:

Nos. of LED’s 8

Run – Protection Healthy (Green) 1

Operation indication (RED) 7

Front Panel LCD Screen

Size of display screen 112mm X 63.3mm

Nos. of Characters/lines displayed 30 Characters X 8 lines

Degree of Protection: IP20

Time Synchronization:

Type of Synchronization RJ 45 (SNTP) + PPS

Connector type Ethernet / Two-pin Connector

Cable type Twisted pair

Voltage level 24 V

Time Tagging Resolution 1ms

Communication Protocols:

Connection type RS 232 RS 485 Ethernet

Medium of

connection

Electric Electric Electric

Type of Connector DB25 Twisted –Pair RJ45

Type of Data Transfer Serial Serial Serial

Communication

Speed

9600bps 9600bps ~38400bps 10/100Mbps

Max. Cable length 10m 1.2Km 110m

Dielectric level ΙΙΙ ΙΙΙ ΙΙΙ


-9-

Rear port for substation automation:

Connection type Ethernet RS 485

Nos. of ports 2 2

Communication protocol IEC 60870-5-103 or IEC

61850

IEC 60870-5-103 or IEC 61850

Medium of Connection Optical / Electric Electric

Type of Connector (SC/ST) RJ45 Twisted –Pair

Communication Speed 10/100Mbps 9600bps ~38400bps

Max. Cable length 110m 1.2Km

Dielectric level ΙΙΙ ΙΙΙ

Optical Wavelength (λ) 850nm; 1300nm -

Permissible line attenuation 15dB -

EMC Tests for Noise Immunity:

Burst Disturbance Class 3 IEC 60255-22-1

Common mode : 2.5KV IEC 61000-4-1

Differential mode : 1.0KV

Electrostatic Discharge Class 4 IEC 60255-22-2

Disturbance 8KV Contact discharge IEC 61000-4-2

Radiated Electromagnetic Class 3 IEC 60255-22-3

Disturbance 10V/m IEC 61000-4-3

Fast Burst Disturbance Class 4 IEC 60255-22-4

Communication port: 2KV IEC 61000-4-4

other ports: 4KV

Surge Disturbance Class 4 IEC 60255-22-5

Communication port: 2KV IEC 61000-4-5

Other ports: 4KV

RF Conducted Disturbance Class 3 IEC 60255-22-6

10V IEC 61000-4-6

Power frequency magnetic Class 5 IEC 61000-4-8

Field disturbance 100A/m

Pulse frequency magnetic Class 5 IEC 61000-4-9

Field disturbance 1000A/m

Damped oscillatory magnetic Class 5 IEC 61000-4-10

Disturbance 100A/m


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Interruptions in auxiliary 50ms IEC 60255-11

Energizing quantities IEC 61000-4-11

Electromagnetic emission limits IEC 60255-25

Electrical Tests:

Insulation Test Test Values

Insulation resistance 100MΩ IEC 60255-5

Dielectric voltage AC 2KV IEC 60255-5

Impulse voltage test 5KV IEC 60255-5

Mechanical Stress test:

Vibration tests Class 1 IEC 60255-21-1

Shock & Bump test Class 1 IEC 60255-21-2

Environment tests/Climatic stress tests:

Temperature Tests IEC 60068 –2 – 1 / 2

Permissible ambient temperature

During service -100 C to +550 C

Permissible ambient temperature

During storage -250 C to +700 C

Humidity Test IEC 60068 – 2 – 3

Admissible humidity 93% RH at 400 C

(Condensation must be avoided

in operation)

Note: It is recommended that all devices be installed so that they are not exposed to

direct sunlight nor subject to large fluctuations in temperature that may cause

condensation to occur.


-11-

3.2 Function data

Table 2 Differential current protection unit data

Settings Setting range

Differential threshold: I_Diff 0.1 ~ 99.99

Stabilization factor: K_Diff 0.3 ~ 0.99

Tolerance for tripping Range

Current tolerance < ±5%

Time tolerance < 20ms

Time Range

Operating time < 15ms

Resetting time < 100ms

Table 3 Circuit Breaker failure protection unit data

Settings Setting range

Time delay setting for tripping repeat: T_CBF:Stage1 0～2s

Time delay setting for tripping B/C and the bus selective zone to

which Bay n is connected: T_CBF:Stage2

0～2s

Time Range

Resetting time during CBF startup but no tripping < 20ms

Resetting time after CBF tripping < 100ms


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4 Hardware functions

4.1 Hardware arrangements

4.2 Operations of complete units

Analogue input module (AI)

There are 8 AI modules in this equipment, including voltage transformers and current

transformers. The rated phase voltage is 63.5V; the secondary current of CT may be 5A

or 1A according to customer’s requirement.

AI2 MODULE

DI1 M

ODULE

MASTER

POWER1

DO1 M

ODULE

DO2 M

ODULE

DO3 M

ODULE

Fig.3 The modules layout of 8U protection box

POWER2

DO4 M

ODULE

AI3 MODULE

AI1 MODULE

AI4 MODULE

AI5 MODULE

AI6 MODULE

AI8 MODULE

AI7 MODULE

CPU1

CPU2

DI2 M

ODULE

DI3 M

ODULE

DI4 M

ODULE

DI5 M

ODULE

DI6 M

ODULE

DI8 M

ODULE

Fig.4 The modules layout of 4U protection box

DI7 M

ODULE


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Protection CPU module (CPU)

CPU module is the core module of the equipment. There are 2 CPU modules in this

equipment, the hardware and software of which are same entirely, performing protection

function, A/D conversion, soft and hard ware self-monitoring and so on.

Communicating mastering module (MASTER)

This module is the management and communication module of the equipment, which has

functions as follows:

a) Receive and store the fault and event record of CPU, transport this information to

printer to print and send this information to monitoring background through Ethernet

network interface or RS485 interface.

b) Output reports to LCD and operate equipment through keyboard.

Connects the standard RS-232 series port or Ethernet interface to communicate with

external PC, and performs the function of the debugging software CSPC.

Digital input module (DI)

There are 8 DI modules set in the equipment. DI1 module is in the 8U box and DI2 to DI8

are all in the 4U box. It is necessary that the 8U box connects to 4U box with a special

cable. The most digital inputs are working on 220V DC or 110V DC which are used to

connect with isolator replica, circuit breaker status, circuit breaker failure initiation digital

inputs. DI modules can self-monitor each digital input circuit in real time.

Digital output module (DO)

There are 4 DO modules set in the equipment, which mainly output trip and signal

contacts.

Power supply (POW)

The equipment applies double DC power modules. The input DC voltage is 220V or 110 V

(when ordering please give the indication clearly), and the output DC voltage are +24V,

±12V, +5V.


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Note: All the digital inputs and digital outputs in fact can be set up flexibly and

conveniently and their meanings can be changed according to the different projects to

adjust various different occasions.

4.3 Equipment connection and terminal illustration

4.3.1 Layout of rear panel terminals

Fig.44 and Fig.45 are the rear panel terminal layout of 8U protection box and 4U protection

box for Model 1. Fig.46 and Fig.47 are the rear panel terminal layout of 8U protection box and

4U protection box for Model 2. Fig.48 and Fig.49 are the rear panel terminal layout of 8U

protection box and 4U protection box for Model 3.

4.3.2 Illustration of equipment terminal

All terminals are introduced in detail in the following chapters. The defining and designating of

terminal number is as follows: The a2 terminal in X4 module is expressed as X4-a2.

4.3.2.1 Terminal illustration of 8U protection box

AI terminals

The external terminal of 8U protection box has 19 sets of terminals including X1-X19.

X1, X2, X3, X4, X10, X11, X12 and X13 are current and voltage terminals of AI. The position of

current terminal must correspond to the isolator replica connection according to the bay serial

number. IA, IB, IC are the three phase current polarities. IA’, IB’, IC’ are the three phase current

reverse polarity. UA1, UB1, UC1 are three phase voltage entrance of Bus 1 VT. UN1 is the three

phase neutral point entrance of Bus 1 VT. UA2, UB2, UC2 are three phase voltage entrance of

Bus 2 VT. UN2 is the three phase neutral point’s entrance of Bus 2 VT. UA3, UB3, UC3 are

three phase voltage entrance of Transfer Bus VT (only for Model 3). UN3 is the three phase

neutral point entrance of Transfer Bus VT (only for Model 3). The detail illustration of the AI

X4 - a2

Terminal number

Module number


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terminal is as follow Table 4, Table 5 and Table 6.

The Xn-b11/a11 (n = 1,2,3,4,10,11,12,13) terminals of analogue input modules act as the

equipment shielding earth, and they have been connected with X9-c32/a32 inside of the

equipment. These terminals should be empty and not connect with any other signals.

Table 4 Illustration of Model 1 AI Terminals

Module X1 X2 X3

Terminal a b a b a b

1 BAY1 IA1 BAY1 IA1’ BAY3 IB BAY3 IB’ BAY6 IC BAY6 IC’

2 BAY1 IB1 BAY1 IB1’ BAY3 IC BAY3 IC’ BAY7 IA BAY7 IA’

3 BAY1 IC1 BAY1 IC1’ BAY4 IA BAY4 IA’ BAY7 IB BAY7 IB’




7 BAY2 IA BAY2 IA’ BAY5 IB BAY5 IB’ BAY8 IC BAY8 IC’

8 BAY2 IB BAY2 IB’ BAY5 IC BAY5 IC’ BAY9 IA BAY9 IA’

9 BAY2 IC BAY2 IC’ BAY6 IA BAY6 IA’ BAY9 IB BAY9 IB’


11 GND GND GND

Module X4 X10 X11












11 GND GND GND


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Table 4 Illustration of Model 1 AI Terminals (Contd.)

Module X12 X13

Terminal a b a b

1 BAY20 IA BAY20 IA’

2 BAY20 IB BAY20 IB’

3 BAY20 IC BAY20 IC’

4

5

6

7 UB2 UC2

8 UA2 UN2

9 UB1 UC1

10 UA1 UN1

11 GND GND


Module X1 X2 X3












11 GND GND GND


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Module X4 X10 X11












11 GND GND GND

Module X12 X13

Terminal a b a b

1 BAY20 IA BAY20 IA’

2 BAY20 IB BAY20 IB’

3 BAY20 IC BAY20 IC’

4

5

6

7 UB2 UC2

8 UA2 UN2

9 UB1 UC1

10 UA1 UN1

11 GND GND


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Module X1 X2 X3


1 BAY1 IA1 BAY1 IA1’ BAY2 IB2 BAY2 IB2’ BAY5 IC BAY5 IC’

2 BAY1 IB1 BAY1 IB1’ BAY2 IC2 BAY2 IC2’ BAY6 IA BAY6 IA’









11 GND GND GND

Module X4 X10 X11












11 GND GND GND


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Module X12 X13

Terminal a b a b

1

2

3

4

5 UB3 UC3

6 UA3 UN3

7 UB2 UC2

8 UA2 UN2

9 UB1 UC1

10 UA1 UN1

11 GND GND

DI terminals

X5 is DI terminals. There are 22 inputs working on 220V DC or 110V DC and 3 inputs working

on 24V DC. The 22 inputs working on 220V DC or 110V DC are X5-a12, X5-a14, X5-a16,

X5-a18, X5-a20, X5-a22, X5-a24, X5-a32, X5-c4, X5-c6, X5-c8, X5-c10, X5-c12, X5-c14,

X5-c16, X5-c18, X5-c20, X5-c22, X5-c24, X5-c26, X5-c30, X5-c32. The 3 inputs working on

24V DC are X5-a4, X5-a6, X5-a8.

DO terminals

X6, X15, X16, X17, X18, X19 are DO terminals. X6 is signaling terminals. There are 13 pair of

unlatching contacts a2-a4/c2-c4, a2-a6/c2-c6, a2-a8/c2-c8, a2-a10/c2-c10, a2-a12/c2-a12,

a2-a14/a2-c14, a2-a16/c2-c16, a2-a18/c2-c18, a2-a20/c2-c20, a22-a24/c22-c24,

a22-a26/c22-c26, a22-a28/c22-c28, a22-a30/c22-c30. X15 to X19 are tripping terminals. 4

contacts per bay can be supported.

Power terminals

X9 and X14 are two power modules. X9 provides the power for CPU2, all DI modules, all DO

modules and Master module. X14 provides the power only for CPU1. X9 and X14 must be

switched on at the same time. The terminals X9-c2/a2, X9-c4/a4 are the +24V power outputs

which are used for digital inputs working on 24V DC. The terminals c20/a20, c22/a22 are the

positive power inputs of equipment. The terminals c26/a26, c28/a28 are the negative power


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inputs of equipment. The terminals c32/a32 are the equipment shielding earth. They should be

connected with the earth of the transformer substation. When DC power supply fails, the

contacts a14/c14, a16/c16 should be switched on to alarm the DC failure.

Master terminals

X7 is responsible for communication. It is a bridge between CPUs and HMI. It attains the

message of CPU and transports them to HMI according to the standard protocol. There are

Ethernet and RS485 interfaces on it.

CAN interface

X8 is a CAN interface. It should be connected with X26 in a special connection cable. X26 is on

the 4U box.

4.3.2.2 The terminal illustration of 4U protection box

There are 7 DI modules X20, X21, X22, X23, X24, X25, X27 in the 4U protection box. All DI

modules are working on 220V DC or 110V DC. All terminals DC1+ are connected together

internally and all terminals DC1- too.

X26 is CAN interface. It should be connected with X8 by a special connection cable.


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5 Protection functions

This chapter shows the basic structure of the CSC-150 and explains its various functions. The

relevant settings are shown during introducing the functions too. The settings are set either

from the keypad of the CSC-150 front panel or by means of the CSPC communication software.

5.1 Operation of complete unit

The numerical busbar protection CSC-150 is equipped with 2 powerful 32-bit micro-processors

which are equal to each other in processing the relevant information, e.g. measure quantities,

digital inputs, digital outputs and the actual protection functions, etc. This provides fully digital

processing of all functions from data acquisition of measured values to the trip signals for the

circuit breakers.

Fig.5 shows the base structure of the CSC-150.


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The transducers of the measured value input section ME transform the currents from the

measurement transformers of the feeder and match them to the internal processing level of the

unit. Apart from the galvanic and low-capacitive isolation provided by the input transformers,

filters are provided for the suppression of interference. The filters have been optimized with

regard to bandwidth and processing speed to suit the measured value processing. The

matched analog values are then passed to the analog input section AE integrated in the

micro-processor board.

CSC-150

CPU

Fig.5 Hardware structure of the numerical busbar protection relay CSC-150

Digital inputs

ME

Power supply

AE

RS 232

Personal computer

Ethernet/RS 485

Control centre

Trip relay

Trip relay

Signal relay

Signal relay CPU

AE


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The analog input section AE contains input amplifiers, sample and hold elements for each input,

analog-to-digital converters and memory circuits for the data transfer to the micro-processor.

Apart from control and supervision of the measured values, the micro-processor processes the

actual protection functions. These include in particular:

filtering and formation of the measured quantities;

calculation of the zero sequence components of current;

continuous calculation of the values which are relevant for fault detection, e.g. the

differential currents and the restraining currents of the check zone and the bus section

selective zones;

supervising the status of the isolator replicas to define to which bus section they are

allocated;

decision about trip commands;

storage of instantaneous current values and the feeders’ running status during a fault for

analysis.

Digital inputs to and outputs from the micro-processors are channeled via the input/output

elements. By input element, the micro-processor receives information, e.g., the isolator replicas,

the status of the circuit breaker etc. Outputs include, in particular, trip commands to the circuit

breakers and signal for remote signaling of important events and conditions.

An integrated membrane keyboard in connection with a built-in alphanumerical LCD (refer to

Fig.6) enables communication with the unit. All operational data such as settings, equipment

parameters, etc. are entered into the protection from this panel. Using this panel the

parameters can be recalled and the relevant data for the evaluation of a fault can be read out

after a fault has occurred. The dialog with the relay can be carried out alternatively via the serial

interface in the front plate by means of a personal computer.


-24-

Via a serial interface RS485 or an Ethernet network in the rear panel, fault data can be

transmitted to a central evaluation unit. During healthy operation, measured values can also be

transmitted, e.g. load currents. The interfaces are isolated and thus satisfy the requirements for

external signals, i.e. isolation and interference suppression complies with the requirements

according to IEC 60255. The communication protocol is IEC60870-103 or IEC61850

alternatively.

A power supply unit (rated supply voltage is 220 VDC or 110 VDC alternatively) provides the

auxiliary supply on the various voltage levels to the described functional units. +24 V is used for

the relay outputs. The analog input requires ±12 V whereas the micro-processors and their

immediate peripherals are supplied with +5 V. Once the supply voltage fails, the alarming signal

will be issued immediately.

The protection functions are described in detail in the following sections. Each function can be

individually activated or inactivated. As each function is realized by its own autonomous

firmware, mutual interference is excluded.

5.2 Differential current protection unit

The differential current protection represents the main function of the CSC-150. It is

characterized by a high measurement accuracy and flexible matching to the existing station

configurations. It is supplemented by a series of ancillary functions. The measurement methods

described below apply to the check zone as well as to the bus-section selective zone.

5.2.1 Basic principle

The measurement method relies on Krichhoff’s current law. This law states that the vectorial

sum of all currents flowing into a closed area should be zero. This law applies, in the first

instance, to DC current. It applies to AC current for instantaneous values. Thus, the sum of the

currents in all feeders of a busbar should be zero at any instant in time.

CSC-150

LCD

F1 F2 F3 F4 + – SIO

RESET

SET QUIT

Fig.6 Front plate of the CSC-150

Run

Diff Op

CBF Op

B/C O/C Op

CT Fail

Bus Tied

Iso Fail

Alarm


-25-

Fig.7 shows a single busbar station configuration to which n feeders are connected. For the

differential current protection, all CTs’ pole for feeders must be the same. It is defined that the

currents flowing towards the busbar are positive and the currents flowing away from the busbar

is negative. Assuming that the primary currents i1 prim., i2 prim., i3 prim. to in prim. flow in the feeders,

the following equation applies in the free-fault operating condition:

i1 prim. +i2 prim. +i3 prim. +…+in prim. = 0 (5.1)

If this equation is not fulfilled, there should be a fault happened in the busbar region. This law is

the basis of the differential current protection and applies to all the check zone and the

bus-section selective zones. The sum of currents can be used to detect faulty conditions. The

sum of currents based on the instantaneous current values can be formed at any sampling time.

This sum current is used for evaluating when and where the fault happens without interruption.

It will stay at zero if the busbar has no fault happened. When an internal fault happens on the

busbar, the sum current should be no more zero.

The above considerations apply strictly to the primary conditions in a high-voltage substation.

Protection system, however, cannot carry out direct measurements of currents in high-voltage

systems. Protection equipment measurement systems are connected to the CT secondary

windings through the current transformers. The secondary windings scale down the currents to

the protection equipment according to the transformation ratio. Furthermore, the current

transformers, due to the isolation of their secondary circuits from the high-voltage system and

by appropriate earthing measures, can keep dangerous high voltages away from the protection

system.

The current transformers are an essential part of the whole protection system and their

characteristics are an important factor for the correct operation of the differential current

protection. Their physical locations mark the limits of the protection zone covered by the

protection system.

Since the current transformers transform in direct proportion to the primary currents in the

station, the following equation based on the secondary current values applies to the busbar

protection in the free-fault operating condition:

n1·i1 sec. + n2·i2 sec. + n3·i3 sec. +…+ nn·in sec. = 0 (5.2)

n1, n2, n3, …, nn are the CT transformation ratios and i1 sec., i2 sec., i3 sec., …in sec. are the

secondary currents.

Although such a busbar protection would certainly detect any short-circuit inside the protection

i1 i2 i3 in

Fig.7 Single busbar station configuration


-26-

zone, the transformation errors of the current transformers, which are unavoidable to some

degree, are also liable to cause spurious tripping as a result of an external short-circuit. For

instance, when a fault happens on one of the feeder bays, the current flowing into the short

circuit is shared on the infeeding side by several bays. The current transformers in the

infeeding bays carry only a fraction of the total fault current while the current transformer in the

faulted feeder bay carries the full current in its primary winding. If the fault current is very high,

this set of current transformers may therefore be saturated, so tending to deliver only a fraction

of the actual current on the secondary side while the rest of the current transformers, due to the

distribution of currents among several bays, perform properly. Although the sum of the currents

is zero on the primary side, the sum of the currents in equation (5.2) is now no longer zero. So

the restraining measure must be taken to guard against the disturbing influences.

5.2.2 Algorithm with instantaneous values

The restraining measure has the function of reducing the influence on the measurement of

transformation inaccuracies in the various feeders to such a degree that spurious behavior of

the protection system is prevented. The busbar protection CSC-150 solves this problem by

forming both the differential current which acts in the operating sense and the restraining

current which has a restraining effect at any sampling time.

The standard characteristic of the CSC-150 is determined by the two settable parameters:

stabilization factor K_Diff and differential current threshold I_Diff.

The differential current (based on the CT secondary instantaneous currents):

id = | n1·i1 sec. + n2·i2 sec. + n3·i3 sec. +…+ nn·in sec. | (5.3)

The restraining current (based on the CT secondary instantaneous currents):

if = | n1·i1 sec. |+| n2·i2 sec.|+|n3·i3 sec. |+…+| nn·in sec.| (5.4)

n1, n2, n3, …, nn are the CT transformation ratios which should be set by user. They are

Differential current id

Restraining current if

I_Diff

0

id = if

id = K_Diff · if

Operating characteristic

Operation zone

Fig.8 Operating characteristic of the CSC-150


-27-

described in Chapter 5.2.4.

The criterion for a short circuit on the busbar is thus:

id > I_Diff (5.5)

id > K_Diff · if (5.6)

Fig.8 illustrates the characteristic of a percentage biased differential protection system. If a

short circuit occurs on the busbars whereby the same phase relation applies to all infeeding

currents, then id=if. The fault characteristic is a straight line inclined at 45°. Any difference in

phase relation of the fault currents leads to a lowering of the fault characteristic. The settable

stabilization factors 0.3 to 0.99 for the bus-section selective zone and a fixed stabilization factor

0.3 for the check zone are represented as a straight line with corresponding gradient and form

the operating characteristic.

Formula (5.5) relies on the unbalancing differential current of the evaluated busbar and formula

(5.6) relies on the stabilization factor of the differential current to the restraining current. If the

external fault happens near the busbar, the unbalancing differential current is larger than the

fault-free stage as the transformation errors of the current transformers. On this time the

formula (5.5) is fulfilled easily, but the formula (5.6) is not fulfilled for the restraining current very

larger than the differential current. The point which the differential current refers to the

restraining current is below the set operating characteristic line. The formula (5.6) is very useful

to improve the protection reliability. For an internal fault occurring on the busbar, the formula

(5.5) and (5.6) are fulfilled easily. Then tripping is initiated.

5.2.3 Summary of the measuring method

The CSC-150 evaluates the differential current and the restraining current according to the

formula (5.5) and (5.6) at every sample interval continually. The measuring method of the

busbar protection can be summarized as follows:

For a continual N points evaluating window, there are not less than (N-2) points fulfilling

Id > I_Diff

Id > K_Diff · if

Then tripping occurs.

For the double busbar arrangement (refer to Fig.9), the measurement method should be

fulfilled for the check zone and the faulted busbar selective zone. The logic diagram is

illustrated in Fig.10.


-28-

The busbar differential protection is based on the instantaneous values of all feeders’ current

connected to the busbar and acts the measurement method step by step using a moving

window. In the event of an internal short circuit, a tripping signal is initiated within the very short

time of less than 15 millseconds.

5.2.4 Adjustment of the current transformer ratios

As the different loadflow for all bays, the current transformer ratios are different. For formula

(5.3) and (5.4), the CSC-150 can adjust these automatically according to the current

transformer ratios set by user in order to fulfill to Krichhoff’s current law on the secondary

currents. For instance, the first feeder’s current transformer ratio is 2500/5, the second feeder’s

current transformer ratio is 1250/5, the third feeder’s current transformer ratio is 500/5, the

fourth feeder’s current transformer ratio is 1000/5, and so on. The user should set the current

id > (I_Diff) and id > K_Diff · if : BZI

id > (I_Diff) and id > 0.3 · if : CZ

id > (I_Diff) and id > K_Diff · if : BZII

& Issuing TRIP command and isolating BZI

&

Fig.10 Logic diagram of the CSC-150 for the double busbar arrangement

Issuing TRIP command and isolating BZII

BZI

Check zone

BZI

BZII

BZII

G1 G2 G1 G2 G1 G2 G1 G2

G1

G2

B/C

Feeder 1 Feeder 2 Feeder n

Fig.9 Measurement method for the check zone, BZI and BZII on the double busbar arrangement


-29-

transformer ratio settings in the value 500, 250, 100, 200, etc. Besides these settings, the user

should choose a settable value as the basic ratio. The basic ratio may be either the maximum

of all current transformer ratios or the middle value of them. If the user chooses the middle

value as the basic ratio, all the ratios of the actual current transformer ratio to the basic value

should be not more than 2. If one bay is not connected to an external feeder current, the

corresponding current transformer ratio setting should be set to zero.

5.2.5 Isolator replica

The CSC-150 confirms the feeder’s running status by monitoring the isolator replicas which are

connected to the feeder. For an isolator, all the normally OPEN and normally CLOSED states

are required. Fig.11 shows the basic connection scheme. The treatment of the isolator status is

described as Table 7.

Table 7

ISOL 1-ON ISOL 1-OFF Isolator running status

1 0 ON

0 1 OFF

1 1 Malfunction

0 0 Malfunction

If the isolator running status is malfunction, the CSC-150 will take some measure for it. If

blocking protection is selected, the CSC-150 will issue alarm signal and block the protection. If

no blocking is selected, the CSC-150 will issue only alarm signal and continue to be operating

by remembering the old running status.

Processing of the isolator running status

If an isolator changes position, for instance from the OFF position to the ON position, a

fixed 200ms delay should be required. That is to say, if the ON position keeps on for

CSC-150

Busbar

G1

DC1+ DC1-

ISOL 1-ON

ISOL 1-OFF

Binary input

Fig.11 Isolator status indications


-30-

200ms, the CSC-150 considers the ON position reaching. During this running time, the

isolator is considered to be in the OFF position. This intermediate status is monitored. After

2s, if the OFF position disappears and the ON position is not given, the CSC-150 assumes

the isolator is on a faulty status and an alarm is issued for per isolator.

Preferential treatment during busbar coupling via isolators

If two busbars are solidly linked via the isolators of one feeder, the CSC-150 considers two

busbars running as a single busbar. At the same time, the CSC-150 has the differential

currents and the restraining currents of the all two bus-section selective zone to be equal

to that of the check zone. When a short circuit occurs on any busbar, the CSC-150 will

issue TRIP command to all feeders.

Auxiliary voltage supply failure

The CSC-150 has an independent box (19 inch in width, 4U in height) which is used to

connect the external isolator replicas. This box’s auxiliary voltage is sub-fused. If the

auxiliary voltage is missing, then all the isolators’ normally OPEN and normally CLOSED

states are zero. After a fixed 2s delay, the CSC-150 will issue an alarm signal and continue

to operate by remembering the old running status.

5.2.6 Circuit breaker status

The circuit breaker positions of all feeders including bus coupler are connected to the CSC-150.

Fig.12 shows the basic connection scheme.

All positions of circuit breaker are used for displaying the busbar arrangement in LCD or HMI.

For Model 1 or Model 2, only the position of bus coupler circuit breaker (BAY1 CB CLOSE and

BAY1 CB OPEN) is useful to the differential current protection. For Model 3, both the bus

CSC-150

BUS1

Bay n

DC1+ DC1-

Bay n CB CLOSE

Bay n CB OPEN

Digital input

Fig. 12 CB status indications

BUS2


-31-

coupler CB (BAY1 CB CLOSE and BAY1 CB OPEN) and the transfer bus coupler CB (BAY2

CB CLOSE and BAY2 CB OPEN) are useful to the differential current protection. The treatment

of CB status is described as Table 8.

Table 8

CB CLOSE CB OPEN CB status

1 0 Closed

0 1 Open

1 1 Malfunction

0 0 Malfunction

If CB changes position, for instance from the OPEN position to the CLOSED position, a fixed

20ms delay should be required. That is to say, if the CLOSED position keeps on for 20ms, the

CSC-150 considers the CLOSED position reaching. During this running time, the isolator is

considered to be in the OPEN position. This intermediate status is monitored. After 200ms, if

the OPEN position disappears and the CLOSED position is not given, the CSC-150 assumes

the CB is on a faulty status and an alarm is issued. During alarm, the CSC-150 considers the

CB is CLOSED.

5.2.7 Bus coupler variants

Most large busbar configurations are divided into different sections which constitute

autonomous subsystems. The subsystems are connected by bus couplers so that the

configuration can assume all required operating states. Depending on the number of current

transformers, a bus coupler can have the following design variants (refer to Fig.13):


-32-

Option A

If the bus coupler has only one current transformer, the current should be comprised into

BZI and BZII. On this condition, the CSC-150 provides two current inputs (BAY1 IA1/BAY1

IB1/BAY1 IC1) and (BAY1 IA2/ BAY1 IB2/ BAY1 IC2) for the bus coupler’s CT. The BAY1

IA1/BAY1 IB1/BAY1 IC1 is for BZI and the BAY1 IA2/BAY1 IB2/BAY1 IC2 is for BZII. If the

bus coupler CT’s pole is the same as the feeders’ current transformer which connect to the

BZI, the connecting scheme likes as Fig.14. If the bus coupler CT’s pole is the same as the

feeders’ current transformer which connect to the BZII, the connecting scheme likes as

Fig.15. The current value ia1-B1/ib1-B1/ic1-B1 will be added to the differential current and

the restraining current of the BZI and the ia2-B1/ib2-B1/ic2-B1 will be added to the

differential current and the restraining current of the BZII.

BZI

BZII

BZI BZII

Option A

Fig.13 Bus coupler variants

BZI

BZII

BZII BZI

Option B

BZI

BZII

BZII BZI BZII BZI

BZI

BZII


-33-

Option B

If the bus coupler has two current transformers, the currents should be comprised into BZI

and BZII as the Fig.13. The current which belongs to BZI is connected to the CSC-150’s

current input terminal BAY1 IA1/ BAY1 IB1/ BAY1 IC1. The current which belongs to BZII is

connected to the CSC-150’s current input terminal BAY1 IA2/ BAY1 IB2/ BAY1 IC2. On this

condition, the current transformer pole must be the same as the feeders’. The current

value will be added to the differential current and the restraining current as the feeders.

CSC-150

BZI

BZII

Fig.15 Connecting Scheme for the current of the B/C

Feeder n

B/C BAY1 IA1 BAY1 IA1’

BAY1 IB1 BAY1 IB1’

BAY1 IC1 BAY1 IC1’

BAY1 IA2 BAY1 IA2’



IA

IB

IC

IN

BZI

BZII

Fig.14 Connecting Scheme for the current of the B/C

Feeder n

B/C BAY1 IA1 BAY1 IA1’






CSC-150

IA

IB

IC

IN


-34-

5.2.8 Double busbar configuration

5.2.8.1 Double-busbar with a special bus coupler arrangement

Note: For Double-busbar with a special bus coupler arrangement, please choose the

CSC-150 Model 2.

For an n-bays system, the digital inputs and binary outputs are corresponding to each bay. The

bus coupler takes up two current inputs and the other feeder only takes up one current input,

n+1 current inputs are needed. The following item are stated:

Ensure the conformability of all feeders’ current transformer pole, all to the busbar or from

the busbar.

Define the bus coupler as the bay 1. For one current transformer, the current is connected

to the CSC-150 BAY1 IA1/BAY1 IB1/BAY1 IC1 and BAY1 IA2/BAY1 IB2/BAY1 IC2

according to Fig14 or Fig15. For two current transformers which are allocated to the

subsystems are overlapping, one current which belongs to BZI is connected to the

CSC-150 BAY1 IA1/ BAY1 IB1/ BAY1 IC1 and another which belongs to BZII is connected

to BAY1 IA2/ BAY1 IB2/ BAY1 IC2.

Define the other feeders as the bay 2 to bay n. The CSC-150 provides one group of current

input (Phase A, Phase B, Phase C) for each feeder. For an n-bays system, n+1 groups of

current input are needed. All currents i1, i2, i3, i4, i5 to in+1 are based on the same standard.

For the bay j, define G1j and G2j as the factors which are related to the status of the isolators

G1 and G2. G1j only may be zero or one when the status of the G1 of BAY j is OPEN or

CLOSED. G2j only may be zero or one when the status of the G2 of BAY j is OPEN or

CLOSED.


-35-

For this configuration, there are two options (Fig.16): Option A and Option B. In option A,

the number of the bus coupler CT is one; in option B, the number of the bus coupler CT is

two. For an n-bays system, i1, i2 are the bus coupler currents and i3 to in+1 are the feeder

currents. The check zone comprises all bays except the bus coupler and is regardless of

the isolator status. For check zone, the algorithm of the differential current and the

restraining current are described as follows:

the differential current

id = |i3 +…+in+1|

and the restraining current

if = |i3|+…+|in+1|

The bus-section selective zone comprises the bus coupler and the feeders allocated to the

bus section. The CSC-150 requires connecting all the isolator replicas of G1 and G2 one

by one in order to determine the feeders running status correctly. The differential currents

and restraining currents of the bus-section selective zones are same in Option A and

Option B. They are described as follows:

For the bus-section selective zone of the BZI, the differential current

id = |K1·i1 +G12·i3 +…+G1n·in+1|

Fig.16 Double-busbar with a special bus coupler arrangement

BZI

BZII B/C

Option A

BZI

BZII B/C

Option B

G1 G1 G2 G2 G1 G2

G1 G2

G1

G2

G1

G2 G1 G2 G1 G2

CT2

CT1


-36-


if = | K1·i1|+|G12·i3|+…+|G1n·in+1|

When the two bus sections are all on running, the value of K1 is relative to the status of the

bus coupler circuit breaker. If the status of the bus coupler circuit breaker is OPEN, K1 is

zero; otherwise K1 is one. When only one of the two bus sections is on running, K1 is one.

For the bus-section selective zone of the BZII, the differential current

id = |K2·i2 +G22·i3 +…+G2n·in+1|


if = |K2·i2|+|G22·i3|+…+|G2n·in+1|



zero. Or not K2 is one. When only one of the two bus sections is on running, K2 is one.

Note: main busbar and transfer busbar, 1 main + 1 main / 1 transfer busbar

arrangements are same as double busbar arrangement. Please choose the CSC-150

Model 2 too.


-37-

5.2.8.2 Main Double and a Transfer Busbar Arrangement

Fig.17 illustrates two kinds of scheme for this configuration. The difference between Option A

and Option B is the current transformer location. Since the current transformer location is

different, the measurement method is different too. For Option A, the measurement method of

the check zone and the bus-section selective zones is same as that of double busbar

arrangement. Please choose the CSC-150 Model 2. For Option B, the check zone comprises

only feeders but no the transfer bus coupler. If a short-circuit occurs on the transfer bus, the

check zone detect the fault as an internal fault. In order to ensure the protection selectivity,

another selective zone should be added for the transfer busbar for Option B. Please choose the

CSC-150 Model 3.

For an n-bays system in Option B, the digital inputs and binary outputs are corresponding to

each bay. The following items are stated:


the busbar.

Fig.17 Main double and a transfer busbar arrangement

BZI

BZII

Transfer busbar

B/C

Option A

BZI

BZII

Transfer busbar

B/C

Option B

G1 G1 G2 G2 G1 G2

G3 G3 G3

G3 G3 G3

G1 G2

G1

G2

G1

G2 G1 G2 G1 G2


-38-

Define the bus coupler as the bay 1. There may be one CT or two CTs for it. For one current

transformer, the currents are connected to the CSC-150 BAY1 IA1/BAY1 IB1/BAY1 IC1 and

BAY1 IA2/BAY1 IB2/BAY1 IC2 according to Fig14 or Fig15. For two current transformers

which are allocated to the subsystems are overlapping, one current which belongs to BZI is

connected to the CSC-150 BAY1 IA1/BAY1 IB1/BAY1 IC1 and another which belongs to

BZII is connected to BAY1 IA2/BAY1 IB2/BAY1 IC2.

Define the transfer bus coupler as the bay 2. There may be one CT or two CTs for it. For

one current transformer, the currents are connected to the CSC-150 BAY2 IA1/BAY2

IB1/BAY2 IC1 and BAY2 IA2/BAY2 IB2/BAY2 IC2 according to Fig.18. For two current

transformers, the currents are connected to the CSC-150 BAY2 IA1/BAY2 IB1/BAY2 IC1

and BAY2 IA2/BAY2 IB2/BAY2 IC2 according to Fig.19. The two current transformers which

are allocated to the main busbars and the transfer busbar are overlapping, one current

which belongs to main busbars is connected to the CSC-150 BAY2 IA1/BAY2 IB1/BAY2 IC1

and another which belongs to transfer busbar is connected to BAY2 IA2/BAY2 IB2/BAY2

IC2.


input (Phase A, Phase B, Phase C) for the other feeder. For an n-bays system, n+2 groups

of current input are needed. All currents i1, i2, i3, i4, i5 to in+2 are based on the same standard.

For the bay j, define G1j, G2j and G3j as the factors which are related to the status of the

isolators G1, G2 and G3. G1j only may be zero or one when the status of G1 of BAY j is

OPEN or CLOSED. G2j only may be zero or one when the status of G2 of BAY j is OPEN or

CLOSED. G3j only may be zero or one when the status of G3 of BAY j is OPEN or

CLOSED.

CSC-150 BZI

BZII

BZT

BAY1

BAY2

BAY3

IA BAY2 IA1 BAY2 IA1’

IB

IC






IN

Fig.18 One CT for transfer bus coupler and Its connection to CSC-150

CT

CT

G1 G2 G3 G1 G3 G2

G1 G2


-39-

For Option B, the CSC-150 requires connecting all the isolator replicas of G1, G2 and G3 one

by one in order to determine the feeders running status correctly. The bus coupler current is

connected to the CSC-150 BAY1 IA1/BAY1 IB1/BAY1 IC1 and BAY1 IA2/BAY1 IB2/BAY1 IC2

and the transfer bus coupler current is connected to BAY2 IA1/BAY2 IB1/BAY2 IC1 and BAY2

IA2/BAY2 IB2/BAY2 IC2. The check zone comprises all bays except the bus coupler and the

transfer bus coupler regardless of the isolator status. The bus-section selective zone for BZI

and BZII comprises the bus coupler, the transfer bus coupler and the feeders allocated to the

bus section. The bus-section selective zone for the transfer busbar comprises the transfer bus

coupler and the bypassed feeder. The algorithm of the differential current and the restraining

current are described as follows:

For check zone, the differential current

id = |i5 +…+in+2|


if = |i5|+…+|in+2|

For BZI, the differential current

id = |K1·i1 +G12·i3 + G13·i5 +…+G1n·in+2|


if = |K1·i1|+|G12·i3|+|G13·i5|+…+|G1n·in+2|

The method to get the value of K1 is the same as that of double busbar arrangement.

For BZII, the differential current

id = |K2·i2 +G22·i3 + G23·i5 +…+G2n·in+2|

BZI

BZII

BZT

BAY2

BAY3

Fig.19 Two CTs for transfer bus coupler and theirs connection to CSC-150

BAY1


IB

IC






IN

CT3

CT3

CSC-150

CT4

IN

IA

IB

IC CT4

G1 G3 G2 G1 G2 G3 G1 G2


-40-


if = |K2·i2|+|G22·i3|+|G23·i5|+…+|G2n·in+2|

The method to get the value of K2 is the same as that of double busbar arrangement.

For the selective zone of the transfer busbar, the differential current

id = | G32·i4 +G33·i5 +…+G3n·in+2|


if =|G32·i4|+ |G33·i5|+…+|G3n·in+2|

5.2.9 Single busbar with a bus coupler arrangement

Note: For single busbar with a bus coupler arrangement, please choose the CSC-150

Model 1.


the busbar.

Define the bus coupler as the bay 1. There may be one CT or two CTs for it. For one current

transformer, the current is connected to the CSC-150 BAY1 IA1/BAY1 IB1/BAY1 IC1 and

BAY1 IA2/BAY1 IB2/BAY1 IC2 according to Fig14 or Fig15. For two current transformers

which are allocated to the subsystems are overlapping, one current which belongs to BZI is

connected to the CSC-150 BAY1 IA1/ BAY1 IB1/ BAY1 IC1 and another which belongs to

BZII is connected to BAY1 IA2/ BAY1 IB2/ BAY1 IC2.




Ensure the bus section as BZI or BZII and connect the isolator replica with the

corresponding digital inputs. Assuming the bus section to which the bay j is connected is

BZI, connect the bay j isolator replica normally open contact with the CSC-150’s digital

input BAY j ISOL1-ON, and the normally close contact with the digital input BAY j

ISOL1-OFF and leave the digital inputs BAY j ISOL2-ON and BAY j ISOL2-OFF spare.

Assuming the bus section to which the bay k is connected is BZII, connect the bay k isolator

replica normally open contact with the CSC-150’s digital input BAY k ISOL2-ON, and the

normally close contact with the digital input BAY k ISOL2-OFF and leave the digital inputs

BAY k ISOL1-ON and BAY k ISOL1-OFF spare. All the isolator replica contacts should be

connected one by one.

If the bay j is connected with BZI, define G1j as the factor which is related to the status of

the isolator G1. G1j is zero or one when the status of the G1 of BAY j is OPEN or CLOSED.

On this condition G2j should be zero. If the bay k is connected with BZII, define G2k as the

factor which is related to the status of the isolator G2. G2k is zero or one when the status of

the G2 of BAY k is OPEN or CLOSED. On this condition G1k should be zero.


-41-

The single busbar with a bus coupler arrangement is described as Fig.20. For this

configuration, i1, i2 are the bus coupler currents and i3 to in+1 are the feeder currents. The

check zone comprises all bays except the bus coupler and is regardless of the isolator

status. For check zone, the algorithm of the differential current and the restraining current

are described as follows:


id = |i3 +…+in+1|


if = |i3|+…+|in+1|


bus section. The CSC-150 requires connecting all the isolator replicas of G1 or G2 one by

one in order to determine the feeders running status correctly. The differential currents and

restraining currents of the bus-section selective zones are described as follows:


id = |K1·i1 +G12·i3 +…+G1n·in+1|


if = | K1·i1|+|G12·i3|+…+|G1n·in+1|



zero, otherwise K1 is one. When only one of the two bus sections is on running, K1 is one.


id = |K2·i2 +G22·i3 +…+G2n·in+1|


if = |K2·i2|+|G22·i3|+…+|G2n·in+1|

Fig.20 Single busbar with a bus section arrangement

BZI

Feeder j Feeder 2 Feeder 1

BZII

Feeder n Feeder k+1 Feeder k

B/C


-42-



zero, otherwise K2 is one. When only one of the two bus sections is on running, K2 is one.

5.2.10 Single busbar arrangement

Note: For single busbar arrangement, please choose the CSC-150 Model 1.


the busbar.

Leave the bay1 invalid. The AI inputs BAY1 IA1, BAY1 IB1, BAY1 IC1, BAY1 IA2, BAY1 IB2,

BAY1 IC2 should be left spare. The digital outputs TRIP1: BAY1, TRIP2: BAY1, TRIP3:

BAY1, TRIP4: BAY1 should be left spare. The digital inputs BAY1 ISOL1-ON, BAY1

ISOL1-OFF, BAY1 ISOL2-ON, BAY1 ISOL2-OFF may be left spare. Energize the bus

coupler CB open.







input BAY j ISOL1-ON, and normally close contact with digital input BAY j ISOL1-OFF and

leave the digital inputs BAY j ISOL2-ON and BAY j ISOL2-OFF spare. Assuming the bus

section to which the bay k is connected is BZII, connect the bay k isolator replica normally

open contact with the CSC-150’s digital input BAY k ISOL2-ON, and normally close contact

with digital input BAY k ISOL2-OFF and leave the digital inputs BAY k ISOL1-ON and BAY

k ISOL1-OFF spare. All the isolator replica contacts should be connected one by one.







-43-

The single busbar arrangement is described as Fig.21. All feeders are connected with the

same bus section. The check zone comprises all bays except the bus coupler and is

regardless of the isolator status. For check zone, the algorithm of the differential current

and the restraining current are described as follows:


id = |i3 +…+in+1|


if = |i3|+…+|in+1|


bus section. The differential currents and restraining currents of the bus-section selective

zones are described as follows:

id = | G12·i3+…+ G1n·in+1| or id = | G22·i3+…+ G2n·in+1|


if = | G12·i3|+…+| G1n·in+1| or if = | G22·i3|+…+| G2n·in+1|

5.2.11 One and a half circuit breaker arrangement

Note: For One and a half circuit breaker arrangement, please choose the CSC-150 Model

1.


the busbar.

Leave the bay1 invalid. The AI inputs BAY1 IA1, BAY1 IB1, BAY1 IC1, BAY1 IA2, BAY1 IB2,

BAY1 IC2 should be left spare. The digital outputs TRIP1: BAY1, TRIP2: BAY1, TRIP3:

BAY1, TRIP4: BAY1 should be left spare. The digital inputs BAY1 ISOL1-ON, BAY1

ISOL1-OFF, BAY1 ISOL2-ON, BAY1 ISOL2-OFF may be left spare. Energize the bus

coupler CB open.

Fig.21 Single busbar arrangement

Busbar

Feeder n Feeder 3 Feeder 2 Feeder 1


-44-







input BAY j ISOL1-ON, and normally close contact with digital input BAY j ISOL1-OFF and

leave the digital inputs BAY j ISOL2-ON and BAY j ISOL2-OFF spare. Assuming the bus

section to which the bay k is connected is BZII, connect the bay k isolator replica normally

open contact with the CSC-150’s digital inputs BAY k ISOL2-ON, and normally close

contact with digital input BAY k ISOL2-OFF and leave the digital inputs BAY k ISOL1-ON

and BAY k ISOL1-OFF spare. All the isolator replica contacts should be connected one by

one.






One and a half circuit breaker arrangement is described as Fig.22. For this configuration, it

is recommendatory that two sets of the busbar protection relay which is for the single

busbar arrangement are equipped with. If the users persist using one set, please connect

isolator replica as above.

Fig.22 One and a half circuit breaker arrangement

BZI

BZII


-45-

For this configuration, i3 to in+1 are the feeder currents. The check zone comprises all bays

and is regardless of the isolator status. For check zone, the algorithm of the differential

current and the restraining current are described as follows:


id = |i3 +…+in+1|


if = |i3|+…+|in+1|

The bus-section selective zone comprises the feeders allocated to the bus section. The

CSC-150 requires connecting all the isolator replicas of G1 or G2 one by one in order to

determine the feeders running status correctly. The differential currents and restraining

currents of the bus-section selective zones are described as follows:


id = | G12·i3 +…+G1n·in+1|


if = |G12·i3|+…+|G1n·in+1|


id = | G22·i3 +…+G2n·in+1|


if = |G22·i3|+…+|G2n·in+1|

5.3 Circuit-breaker Failure protection unit

The circuit-breaker failure protection in the CSC-150 detects a failure of the circuit breaker

either in the event of a feeder/transformer short-circuit or a busbar short-circuit.

In the event of a circuit breaker failure with a feeder/transformer short-circuit, the bus section to

which the feeder/transformer with the defective breaker is allocated is selectively isolated. In

addition a transfer trip signal is issued in order to trip the remote feeder terminal too.

In the event of a circuit breaker failure with a busbar short-circuit, a transfer trip signal is issued

in order to trip the remote feeder terminal or initiate the transformer circuit-breaker failure

protection.

5.3.1 Circuit-breaker failure protection during a feeder/transformer

short-circuit

If a circuit-breaker failure occurs after a feeder/transformer short-circuit, the bus section with

the corresponding feeder/transformer has to be isolated. The circuit-breaker failure protection

in the CSC-150 is initiated by an external circuit-breaker failure signal or a TRIP command from

the feeder/transformer protection which are connected to the CSC-150 digital inputs for the

circuit breaker failure protection.


-46-

The logic diagram is shown as Fig.23. The CBF protection has two time stages and two current

elements: phase current and 3I0 current. The phase current is activated fixedly and the 3I0

current can be selected for each bay according to the users’ requirement. The time stages

settings are same for all bays but the current settings should be set for each bay. When the

configured CBF initiation digital inputs of the feeder or transformer are activated and the

currents are over the settings, the CSC-150 will isolate the busbar to which the feeder or

transformer with the faulted circuit breaker is connected through the different time stages.

Issue a 3-phase TRIP command to the tripped circuit breaker after the TRIP repetition time

has elapsed. (T_CBF: Stage1)

Issue 3-phase TRIP commands according to the isolator replica to isolate the busbar to

which the feeder or transformer with the faulted circuit breaker is connected after a longer

time delay has elapsed. (T_CBF: Stage2)


-47-

5.3.2 Circuit-breaker failure protection for busbar faults

Circuit-breaker failure can occur during a busbar short-circuit, too. In this case, for a feeder an

inter-trip signal should be transmitted to the remote end feeder protection. If this signal is

attained by the feeder protection, the fault current can be interrupted quickly. For a increasing in

voltage transformer, an inter-trip signal must be transmitted to the transformer protection.

T_CBF:Stage1 0

T_CBF: Stage2 0

START A-PH BAY n

START B-PH BAY n

IA>Ip_CBF: Bay n

IB>Ip_CBF: Bay n

IC>Ip_CBF: Bay n

Trip A, B, C for Bay n

IA>Ip_CBF: Bay n

IB>Ip_CBF: Bay n

IC>Ip_CBF: Bay n

START C-PH BAY n

3I0>3I0_CBF: Bay n

≥1

Trip A, B, C for bus coupler and BZ to which Bay n is connected

CBF protection is enabled

3I0 is activated for Bay n

START 3-PH BAY n

Fig.23 Logic diagram of CBF protection

3I0>3I0_CBF: Bay n


3I0>3I0_CBF: Bay n


3I0>3I0_CBF: Bay n



-48-

If this signal is attained by the transformer protection, the transformer protection initiates its

circuit-breaker failure protection to judge whether the circuit breaker near the busbar is faulted

or not. If it is faulted, the transformer protection should interrupt the fault current through

tripping the other side circuit-breakers of the transformer.

5.4 Bus coupler circuit breaker failure unit

The bus coupler circuit-breaker failure protection can be initiated by an external circuit-breaker

failure signal or a TRIP command from the B/C protection or an internal protection tripping flag

including the current differential protection and the B/C overcurrent protection. The customer

can activate or deactivate these sub-functions through the settings.

External initiating B/C CBF

When the separated protection equipment is configured for the bus coupler, the customer can

activate the function (External initiating B/C CBF) as a backup function for B/C CB failure.

When the separated protection equipment operates to trip B/C CB and its tripping message is

passed to the busbar protection, the B/C CBF is initiated. The logic diagram is shown as Fig.

24.

Current differential protection initiating B/C CBF

If a busbar short-circuit occurs with the bus coupler closed, a TRIP command is issued to all

related feeders of this zone and to the bus coupler. The B/C CBF should be initiated under the

function (Diff initiating B/C CBF) activated. The logic diagram is shown as Fig. 24.

B/C O/C protection initiating B/C CBF

When the internal B/C O/C protection is activated and a disturbance results in the B/C O/C

protection operating to trip the B/C CB. The B/C CBF should be initiated under the function

(B/C O/C initiating B/C CBF) activated. The Logic diagram is shown as Fig. 24.

There are two groups of current inputs for the bus coupler. In order to realize the logic of B/C

CBF protection, the customer should select which one is the main B/C CT through the

equipment parameter: CT1 As the B/C Main CT. If setting CT1 As the B/C Main CT as 1, the

bus coupler current for B/C CB failure is BAY1 IA1/BAY1 IB1/ BAY1 IC1. If setting CT1 As the

B/C Main CT as 0, the bus coupler current for B/C CB failure is BAY1 IA2/BAY1 IB2/ BAY1 IC2.

The logic diagram of the bus coupler circuit breaker failure is shown as Fig.24. The B/C CBF

protection has two time stages and one phase current element. If the bus coupler current (more

than I_CBF: B/C) persists and the setting time (T1_CBF: B/C) has elapsed, the bus coupler

circuit breaker failure is detected and the TRIP command should be issued to the bus coupler

circuit-breaker again. If the current persists and the delay time T2_CBF: B/C has elapsed, the

TRIP commands should be issued to trip BUS1 and BUS2 together. The time stages are

described as follows:


-49-

Issue a 3-phase TRIP command to the bus coupler circuit breaker after the TRIP repetition

time has elapsed. (T1_CBF: B/C)

Issue 3-phase TRIP commands to all feeders after a longer time delay has elapsed.

(T2_CBF: B/C)

5.5 Protection in the “dead zone” of the bus coupler unit

In the double busbar arrangement one bus coupler can be assigned to either BZI or BZII. If the

bus coupler only uses one current transformer or two current transformers on the same side,

there is the dead zone when the fault happens between the bus coupler current transformer

and circuit breaker.

The bus coupler circuit breaker is closed

In the event of a short-circuit in the dead zone of the bus coupler with the circuit breaker

closed, BZI is tripped because all currents flow towards the busbar. BZII remains in

operation, which means that the fault current continues to be fed (refer to Fig.25). In order

to interrupt the short-circuit current, the second bus zone BZII must be isolated, too.

External initiates B/C CBF

B/C O/C operation initiates B/C CBF

Diff protection operation initiates B/C CBF

BZII Diff Op

External initiation

T2_CBF:B/C 0

T1_CBF:B/C 0

+

MaxIA, IB, IC > I_CBF: B/C

Fig.24 Logic diagram of B/C CB failure protection

B/C O/C Op

START 3-PH BAY1

& B/C CB Retrip

Trip BZI & BZII

External initiating B/C CBF is activated

B/C O/C initiating B/C CBF is activated

Diff initiating B/C CBF is activated

B/C CBF Protection is enabled

&

BZI Diff Op

+

&

&


-50-

For this purpose, the CSC-150 monitors the status of the bus coupler circuit breaker after

BZI has been tripped for a fixed time delay 150ms. If the status is OPEN, the bus coupler

current for the measurement system BZII is set to zero. This results in an unbalancing of

the measurement system BZII, which issues a TRIP command to all affected circuit

breakers.

The bus coupler circuit breaker is open

If a short-circuit occurs in the dead zone with open circuit breaker and closed isolators

(refer to Fig.26), the CSC-150 monitors the status of the bus coupler circuit breaker to

ensure it operating accurately. If the status is OPEN, the bus coupler current for the

measurement system BZI and BZII is set to zero. This results in a balancing of the

measurement system BZI and an unbalancing of the measurement system BZII, which

issues a TRIP command to all circuit breakers connected to BZII and the BZI remains in

operation.

Fig.26 Short-circuit in the dead zone of the bus coupler with the circuit breaker open

BZI

BZII

B/C

G1 G1 G2 G2 G1 G2

G1

G2

Fig.25 Short-circuit in the dead zone of the bus coupler with the circuit breaker closed

BZI

BZII

B/C

G1 G1 G2 G2 G1 G2

G1

G2


-51-

5.6 Overcurrent protection of the bus coupler

The CSC-150 is equipped with two-stage phase overcurrent and two-stage earth overcurrent

for the bus coupler. Each phase current is compared individually with a threshold Ip_B/C

O/C:Stage1 or Ip_B/C O/C:Stage2 that is set globally per stage. After the corresponding delay

time Tp_B/C O/C:Stage1 or Tp_B/C O/C:Stage2 has elapsed, the TRIP command is issued to

the bus coupler circuit breaker. The TRIP command is also available for each stage individually.

The earth current is compared to the set threshold values 3I0_B/C O/C:Stage1 or 3I0_B/C

O/C:Stage2. As soon as one of these threshold is reached, the delay time T0_B/C O/C:Stage1

or T0_B/C O/C:Stage2 is respectively started. After this delay has elapsed, a TRIP command is

issued to the bus coupler circuit breaker.

Fig.27 is the Logic diagram of the bus coupler overcurrent protection.

5.7 Monitoring functions

5.7.1 CT Saturation

When the fault happens near but external to the busbar, the through current is very severe. It

will lead the current transformer used by the busbar protection CSC-150 to be saturated and

then the differential currents of the check zone and the bus-section selective zone increase. All

these will result in the busbar protection maloperation if no measure is taken. So the CSC-150

provides a sensitive element to detect the current transformer saturation according to the

waveform characteristics of the differential current and the restraining current. It can distinguish

the current transformer saturation in external fault from the internal fault easily and accurately.

In the event of external fault of the busbar, it can lead the differential current to increase if the

current transformer is saturated.

B/C O/C protection is enabled

Ip stage1 is activated

MaxIA, IB, IC> Ip_B/C O/C:Stage1

Tp_B/C O/C:Stage1 0 Phase current stage1 trip

Ip stage2 is activated

MaxIA, IB, IC> Ip_B/C O/C:Stage2

Phase current stage2 trip

3I0 stage1 is

activated 3I0> 3I0_B/C O/C:Stage1

3I0 stage1 trip

3I0 stage2 is activated

3I0> 3I0_B/C O/C:Stage2

3I0 stage2 trip

Tp_B/C O/C:Stage2 0

T0_B/C O/C:Stage1 0

T0_B/C O/C:Stage2 0

Fig. 27 Logic diagram of the bus coupler overcurrent protection


-52-

But even though the current transformer saturation is very severe, the secondary current can

be transformed accurately and linearly when the current is near zero or on the initial stage for

the fault happening. At that time, the differential current is zero. After that time, the differential

current engenders. The CSC-150 takes use of this characteristic to detect the current

transformer saturation. The measurement method of the current saturation comprises that

∆id = |id, t - id, (t-T)| > I_Diff (5.7)

∆if = |if, t - if, (t-T)| > I_Diff (5.8)

(∆id/∆if) < 0.2 (5.9)

Formula (5.7), (5.8) and (5.9) are dealt with in parallel at every sampling interval. According to

each characteristic of these formulas, the different synchronous factors are given to each. It

can be detected when the current transformer saturation happens by using the relation of the

synchronous factors to time. Besides the formula (5.7), (5.8) and (5.9), the harmonic quantity of

the differential current is used, too. All these make the detective element of the current

transformer saturation powerful. When a short-circuit expands from the feeder to the busbar,

the fault can be interrupted quickly by using the waveform characteristics.

5.7.2 CT open circuit

Feeder CT open circuit

When an open circuit occurs in the current transformer of one feeder, the differential

currents of the check zone and the bus-section selective zone are increasing but the

restraining currents are decreasing. The CSC-150 takes use of these characteristics to

detect CT open circuit. The algorithm of feeders’ CT open circuit has two operating mode,

one mode is only for alarming but doesn’t block the busbar protection and another is for

alarming and blocks the busbar protection. The two operating mode can be chosen

independently. The logic diagram is described as Fig.28.


-53-

Bus coupler CT open circuit

When an open circuit occurs in the current transformer of the bus coupler, the differential

current and restraining current of the check zone don’t change but the differential currents

and restraining currents of one bus-section selective zones to which the bus coupler

current transformer is connected may change, the differential currents are increasing and

the restraining currents are decreasing. The logic diagram is described as Fig.29.

Diff Protection is enabled

Id > 0.1In: BZI Alarm the bus coupler CT1 open circuit

& 10s 0

Id > 0.1In: BZII

Note: the logic diagram is used to phase A, B, C respectively.

Fig.29 Logic diagram of the bus coupler CT open circuit

Id < 0.1In: CZ

Alarm the bus coupler CT2 open circuit

& 10s 0

10s 0

10s 0

10s 0

Diff Protection is enabled

Id>(I_CTFail:Alarm): BZI Alarm BZI CT open circuit

CT fail alarm is activated

Id>(I_CTFail:ALARM): CZ

Id>(I_CTFail:ALARM): BZII

&

&

10s 0

Alarm BZII CT open circuit

Id>(I_CTFail:Block): BZI

Alarm BZI CT open circuit and block the measuring method of BZI according to phase which CT is open circuit

Id > (I_CTFail:Block): CZ

Id>(I_CTFail:Block): BZII

&

&

Alarm BZII CT open circuit and block the measuring method of BZII according to phase which CT is open circuit

Note: the logic diagram is used to phase A, B, C respectively.

CT fail block is activated

Fig.28 Logic diagram of the feeder CT open circuit


-54-

5.7.3 VT open circuit

If the bus voltages are connected to the CSC-150, the voltage amplitudes and angles are

displayed in the measurement menu. If the equipment parameter Bus Voltage Connected is

activated, VT open circuit is detected. The criterions are described as follows:

Single or two phase VT open circuit

3U0 is more than 7V.

3-pole VT open circuit

The voltage amplitudes of phase A, phase B and phase C are all less than 8V but the

busbar is running on.

The alarm signal VT Fail should be issued after any criterion is met for 10s. The VT failure

doesn’t influence the protection functions.


-55-

6 Operation

6.1 Safety precautions

During the equipment tests and start-up, the general safety regulations applicable to power

system should be complied with. Failure to comply with these regulations might cause harm to

the working staff and damage to property. All the inspections and tests should be carried out by

specially trained personnel.

Check the enclosure shell has been grounded reliably and maintain electric continuity to

earth.

The general safety regulations applicable to equipments should be strictly complied with.

Plug in or pull out modules should be strictly prohibited during the equipment tests and

operation.

During operation, nobody is allowed to press the keyboard on the panel optionally.

During operation, nobody is allowed to operate the following commands:

Test DO;

Modify and set down settings;

Set up the numbers of running CPU;

Set up the version of Master;

Switch setting group;

Change communication address.

6.2 Dialog with the equipment

6.2.1 Menu frame

Table 9 is the menu frame about the Human Machine Interface (HMI).


-56-

Table 9

Abbr.

(LCD Display) Meaning Remarks

OpStatus Operating Status

AI Analog Input Inspecting the analog input of the

equipment.

Status Equipment Status Inspecting the equipment status.

Version Version Showing the version information of the

CPU in the equipment.

EquipCode Equipment Code Showing the code information of any

module in the equipment.

DI Digital Input Inspecting the status of digital inputs.

Measure Measuring Values

Showing the measure quantities of the

equipment (the currents and the

voltages are displayed by primary

value.).

Settings Settings Setup

CommPara Communication Parameter

BayName Name of Bay Unit Inputting the name of the primary

power unit.

CommAddr Communication Address Setting the address of the Ethernet 1

and Ethernet 2.

TimeMode Timing Mode

BaudR485 Baud Rate of 485

EquipPara Equipment Parameter Setting the equipment parameter.

ProtSet Protection Setting Setting the equipment setting.

ProtContWd Protection Control Word Setting the protection control word.

QueryRep Query Report

EventRpt Event Report

Latest Rpt The latest report

Listing the time of the latest operating

report, inspecting the content by

pressing the SET key.

Last 6 Rpts Last 6 reports

Listing the time of the latest six

operating report, selecting the report

with and key, inspecting the

content with SET key.

QueryRpt by Date Query report by date

Listing the time of the operating reports

which is searched by time sect,

selecting the report with and key,

inspecting the content by pressing the

SET key.


-57-

Table 9 (Contd.)

Abbr.


StartRpt Startup Report


Listing the time of the latest starting


pressing SET key.


Listing the time of the latest six starting

reports, selecting the report with and

key, inspecting the content with SET

key.


Listing the time of the starting reports



inspecting the content with SET key.

AlarmRpt Alarm Report


Listing the time of the latest six alarm



key.


Listing the time of the alarm reports




SET key.

Log Operating Log


Listing the time of the latest six running



key.


Listing the time of the running reports




SET key.

Setup Equipment Setup

SOEReset SOE Reset Option

Automatic Reset Automatic Reset

Manual Reset Manual Reset

Manual resetting or automatic resetting.

Protocol Protocol Option

V1.20 Protocol Communication Protocol

V1.20

V1.10 Protocol Communication Protocol

V1.10

Choosing the protocol for the equipment

communication with exterior V1.20 or

V1.10. The bright option is the current

setup, select the protocol with and

key, set up it by pressing SET key.


-58-

Table 9 (Contd.)

Abbr.


ModifyPW Modify Password Modifying equipment password.

SetPrint Print Setup

RecPrt Setup Setup for print record values

The AI and binary records are listed by

protection equipment. The user can

choose what he hope to print and the

choice can be change at any moment.

Print Mode Setup for print mode Setting print mode, which can be figure

or data mode.

103Type 103 Protocol Select Setting the function code of

IEC60870-5-103.

Print Print

ProtSet Protection Setting Printing protection setting.

Report Report

EventRpt Event Report


Listing the time of the latest operating

report, inspecting the content with



Listing the time of the latest six operating

report, selecting the report with and


key.


Listing the time of the operating reports

which is searched by time sect, selecting

the report with and key, inspecting

the content with SET key.

StartRpt Startup Report


Listing the time of the latest starting




Listing the time of the latest six starting



key.


Listing the time of the starting reports



the content by pressing the SET key.

AlarmRpt Alarm Report


Listing the time of the latest six alarm



key.


Listing the time of the alarm reports



the content by pressing the SET key.


-59-

Table 9 (Contd.)

Abbr.


Log Operating Log


Listing the time of the latest six running



key.


Listing the time of the running reports




SET key.

EquipPara Equipment Parameter Printing equipment parameter.

Setup Equipment Setup Printing equipment setup.

OpStatus Operating Status

AI Analog Input Printing analog input.

Status Equipment Status Printing equipment state.

Version Version Printing the version of CPU in the

equipment.

EquipCode Equipment Code Printing equipment code.

DI Digital Input Printing digital input.

Connector ON/OFF Connector ON/OFF Printing connector state.

PrtSample Print Sampling Data Printing sampling data.

Test DO Digital Output Drive Test Digital output driving.

Set Time Set Time

Testing Testing

SimuReSig Simulate Remote Signal

Simu Alarm Simulate Alarm

Simu Trip Simulate Tripping

Simu Connt Simulate Connector

Simu DI Simulate Digital Input(DI)

Simu Transmit Rec Simulate transmitting record

data

Simu MST Alarm Simulate the alarm of Master

SwSetGrp Switch Setting Group

ViewDrift View AI Zero Drift Inspecting the zero shift of specified

CPU.

AdjDrift Adjust AI Drift

Adjusting the zero shift of all channels.

Choosing the CPU with and key,

fixing All CPUs or CPU1 or CPU2 with

SET key to complete regulating.

ViewScale View AI Scale Inspecting the scale of specified CPU.


-60-

Table 9 (Contd.)

Abbr.


AdjScale Adjust AI Scale

Adjusting the scale of all CPU.

Choosing the channels with , ,

and key, fixing channels and

setting the voltage/current value with

SET key, moving the cursor on

Confirm and pressing the SET key to

complete regulating.

PrtSample Print Sampling Data

Contrast LCD Contrast Regulation Regulating LCD lightness.

OpConnt Connector Operation

OpSoftConnt Soft Connector ON/OFF The operation of switching soft

connector into or out of service.

ViewConnt View Connector Status

Checking the status of soft connector

and hard connector. The first array is

the status of soft connector and the

second array is the status of hard

connector.

Table 10 is the menu frame of the DebuggingMenu.

Table 10

Abbr.


SetCPU Set CPU Setting CPU.

ViewMem View Memory Viewing the memory of the equipment. This operation

should be prohibited.

ClrConfig Clear Configuration This operation should be prohibited.

EquipConfig Equipment Configuration

EquipOpt Equipment Option

LED Set LED Set Setup for LED Attribute: Latched or not Latched.

ConntMode Connector Mode Setup for Connector mode.

SetLCD_Bkdg Set background LCD Setup for background LCD mode.

MasterVer Master Version Choosing Master version.

6.2.2 Display flowing

The display includes <circular display>, <MainMenu>, <DebuggingMenu>, <the message

window for active pop-up>.

The equipment circularly displays the analogue quantities and the setting group. There is the

present time on the top of the screen. You can fix one screen of information to be displayed by

pressing QUIT key, and keep on circularly displaying by pressing the QUIT key again.


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The equipment menu includes the MainMenu and the DebuggingMenu.

You can enter the MainMenu by pressing the SET key when the screen is in

circularly-displaying state. You can enter the DebuggingMenu by pressing the QUIT + SET

keys at the same time (only for manufacturer).

There are four shortcut keys and two functional keys at the bottom of liquid crystal screen. The

main intention is to predigest user’s manipulation. The descriptions of these keys are as Table

11.

Table 11

Shortcut key Remarks

F1 Print the latest event report.

F2 Print settings of current setting group.

F3 Print sampling data.

F4 Print equipment information and operating status.

+ Functional key, the number of setting group +1.

---- Functional key, the number of setting group -1.

6.3 Setting the functional parameters

6.3.1 Setting illustration

6.3.1.1 Equipment parameter

Equipment parameter is mainly design parameter of busbar, including CT secondary rated

current and CT ratio of each unit, etc. They are all fixed parameters and may be set according

to the actual parameters in local by the personnel who are responsible for the protection

debugging, running and maintenance. It is desired usually that the CT secondary rated currents

of all bays are consistent; if there is inconsistence, please illustrate it when ordering.

I_Diff, I_CTFail:Alarm and I_CTFail:Block are all based on the basic CT ratio (CT_Ratio:

Base). The other settings are based on their CT ratio.

VT_Primary: Ph-Ph should be set as the actual parameter. The secondary value of VT

(phase to phase) is 110V fixedly.

CT_Secondary should be set as 1 or 5. If any other value is set, the alarm CT Secondary

Err will be issued and the protection functions will be blocked.

Set the CT transformer ratio as the primary current divided by the secondary current. For

example, if the CT transformer ratio of bay j is 1200:5, CT_Ratio:Bay j should be set as

240.

Users may choose the maximum ratio, the minimum ratio and the random ratio between the

maximum ratio and the minimum ratio as CT_Ratio: Base. But the maximum ratio divided


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by the CT_Ratio: Base should be less than 2. For example: three bays are connected to

one section of busbar, the ratio of bay 1 is 300:5, the ratio of bay 2 is 600:5, the ratio of bay

3 is 1200:5. If choosing 1200:5 as the base ratio, at this time the differential conversion

coefficient of bay 1 is 0.25, the differential conversion coefficient of bay 2 is 0.5, the

differential conversion coefficient of bay 3 is 1, and all of them fulfill the desire. If choosing

300:5 as the base ratio, at this time the differential conversion coefficient of bay 1 is 1, the

differential conversion coefficient of bay 2 is 2, the differential conversion coefficient of bay

3 is 4, differential conversion coefficient exceeds the allowable range, protection will issue

alarm signal and block the protection functions, and users need to choose the base ratio

again.

In denotes CT secondary rated value (1A or 5A).

The CT ratio of no-use bay should be set as 0, for example, when the maximum unit

number is 12, the CT ratio of the units from unit 13 to unit 16 should be set as 0.

6.3.1.2 The settings of differential current protection

I_Diff should ensure that the protection have enough sensitivity when double busbars are

splitting in the minimum running mode and the differential current should be bigger than the

unbalanced current of busbar system running well and the maximum load current of all

feeders of busbar to the greatest extent. The recommended range is more than 0.2In.

K_Diff is mainly according to the proportion for that output current accounts in fault current

when busbar is faulty and the unbalanced current that comes into being because of the CT

error when extern fault exists. The stabilization factor of the check zone is fixed as 0.3 and

users only need to set the stabilization factor of the bus zone. For one and a half CB

arrangement, it can be set within 0.3~0.5; for other busbar system, it can be set within

0.5~0.7.

I_CTFail:Alarm and I_CTFail:Block should be both bigger than the differential maximum

unbalanced current of the equipment running well. The block setting should not be smaller

than the alarm setting and is usually set as about 0.1In.

6.3.1.3 The settings of CBF protection

T_CBF:Stage1 should be larger than the sum of the circuit-breaker tripping time, and

consider somewhat redundancy to fulfill the desire that it cooperates with other protections.

The recommended range is 0.15~1s.

T_CBF:Stage2 should be on the base of the sum of the T_CBF:Stage1 adding the

circuit-breaker trip time, and consider some redundancy. Under the condition that the desire

of cooperation with other protections is ensured to be fulfilled, the time should be as short

as possible and the recommended range is 0.15~1s.


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Ip_CBF:Bay n and 3I0_CBF:Bay n (n is the number of feeder) should be set mainly by

considering the desire that they cooperate with other protections.

6.3.1.4 The settings of B/C O/C protection

The B/C O/C protection current setting and time setting should be set mainly by considering the

desire that they cooperate with other protections.

6.3.1.5 The settings of B/C CBF protection

I_CBF:B/C should be set according to that the busbar protection has enough sensitivity in

the minimum running mode and may be same with the differential current threshold.

T1_CBF:B/C should be larger than the maximum trip quenching time of busbar coupler

circuit-breaker, and consider somewhat redundancy. The recommended range is 0.15~1s.

T2_CBF:B/C should be on the base of the sum of the T1_CBF:B/C and the maximum trip

quenching time of busbar coupler circuit-breaker, and consider somewhat redundancy. The

recommended range is 0.15~1s.

6.3.2 The setting lists of Model 1 (V2.00 and up)


Enter MainMenu–Settings and input the password to enter the sub-menu EquipPara. The

equipment parameters can be changed through up, down, right and left keys. After finishing the

operation, press SET key to set them down to the CPUs. The equipment parameters are listed

as Table 12.

Table 12 Sheet of the Equipment Parameters

S.N. Description Setting Range Default value Unit

1 Bus Voltage Connected 0/1 0 N/A

2 CT1 As the B/C Main CT 0/1 0 N/A

3 Isol Fail Block Protec 0/1 0 N/A

4 Max Bays 2~20 12 N/A

5 VT_Primary:Ph-Ph 0~1500 220 kV

6 CT_Secondary 1~5 1 A

7 CT_Ratio: Base 0~5000 120 N/A

8 CT1_Ratio: Bay1 0~5000 120 N/A

9 CT2_Ratio: Bay1 0~5000 120 N/A

10 CT_Ratio: Bay2 0~5000 120 N/A

11 CT_Ratio: Bay3 0~5000 120 N/A

12 CT_Ratio: Bay4 0~5000 120 N/A

13 CT_Ratio: Bay5 0~5000 120 N/A

14 CT_Ratio: Bay6 0~5000 120 N/A


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15 CT_Ratio: Bay7 0~5000 120 N/A

Table 12 Sheet of the Equipment Parameters (Contd.)


16 CT_Ratio: Bay8 0~5000 120 N/A

17 CT_Ratio: Bay9 0~5000 120 N/A

18 CT_Ratio: Bay10 0~5000 120 N/A

19 CT_Ratio: Bay11 0~5000 120 N/A

20 CT_Ratio: Bay12 0~5000 120 N/A

21 CT_Ratio: Bay13 0~5000 120 N/A

22 CT_Ratio: Bay14 0~5000 120 N/A

23 CT_Ratio: Bay15 0~5000 120 N/A

24 CT_Ratio: Bay16 0~5000 120 N/A

25 CT_Ratio: Bay17 0~5000 120 N/A

26 CT_Ratio: Bay18 0~5000 120 N/A

27 CT_Ratio: Bay19 0~5000 120 N/A

28 CT_Ratio: Bay20 0~5000 120 N/A

6.3.2.2 Protection Control Word

Differential protection

Table 13 Definition of Control Word of Differential Protection

S.N. Description Setting Range Default Value Unit

1 Diff Protec ON 0/1 0 N/A

2 CT Fail Alarm ON 0/1 0 N/A

3 CT Fail Block ON 0/1 0 N/A

Circuit-breaker failure protection

Table 14 Definition of Control Word of Circuit Breaker Failure Protection


1 CBF Protec ON 0/1 0 N/A

Bus coupler over current protection

Table 15 Definition of Control Word of Bus Coupler Overcurrent Protection


1 B/C O/C Protec ON 0/1 0 N/A

2 Iph Stage1 ON 0/1 0 N/A


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4 3I0 Stage1 ON 0/1 0 N/A


Bus coupler circuit breaker failure protection

Table 16 Definition of Control Word of Bus Coupler CB Failure Protection


1 B/C CBF Protec ON 0/1 0 N/A

2 Diff Init B/C CBF ON 0/1 0 N/A

3 B/C O/C Init B/C CBF ON 0/1 0 N/A

4 External Init B/C CBF ON 0/1 0 N/A

6.3.2.3 Protection Setting


The differential protection settings are as Table 17, and these settings are applicable to

CSC-150 standard version software V2.00 and up version.

Table 17 Setting Sheet of the Differential Protection


1 I_Diff 0.1~99.99 1.0 A

2 K_Diff 0.3~0.99 0.6 N/A

3 I_CTFail:Alarm 0.01~99.99 0.5 A

4 I_CTFail:Block 0.01~99.99 0.5 A


The circuit-breaker failure protection settings are as Table 18, and these settings are applicable

to CSC-150 standard version software V2.00 and up version.

Table 18 Setting Sheet of the Circuit Breaker Failure Protection


1 T_CBF:Stage1 0~2 0.15 s


3 3I0_CBF ON:Bay2 0000~0001 0000 N/A

4 Ip_CBF:Bay2 0.1~99.99 1.0 A

5 3I0_CBF:Bay2 0.1~99.99 1.0 A

6 3I0_CBF ON:Bay3 0000~0001 0000 N/A


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7 Ip_CBF:Bay3 0.1~99.99 1.0 A

8 3I0_CBF:Bay3 0.1~99.99 1.0 A

Table 18 Setting Sheet of the Circuit Breaker Failure Protection (Contd.)


9 3I0_CBF ON:Bay4 0000~0001 0000 N/A

10 Ip_CBF:Bay4 0.1~99.99 1.0 A

11 3I0_CBF:Bay4 0.1~99.99 1.0 A

12 3I0_CBF ON:Bay5 0000~0001 0000 N/A

13 Ip_CBF:Bay5 0.1~99.99 1.0 A

14 3I0_CBF:Bay5 0.1~99.99 1.0 A

15 3I0_CBF ON:Bay6 0000~0001 0000 N/A

16 Ip_CBF:Bay6 0.1~99.99 1.0 A

17 3I0_CBF:Bay6 0.1~99.99 1.0 A

18 3I0_CBF ON:Bay7 0000~0001 0000 N/A

19 Ip_CBF:Bay7 0.1~99.99 1.0 A

20 3I0_CBF:Bay7 0.1~99.99 1.0 A

21 3I0_CBF ON:Bay8 0000~0001 0000 N/A

22 Ip_CBF:Bay8 0.1~99.99 1.0 A

23 3I0_CBF:Bay8 0.1~99.99 1.0 A

24 3I0_CBF ON:Bay9 0000~0001 0000 N/A

25 Ip_CBF:Bay9 0.1~99.99 1.0 A

26 3I0_CBF:Bay9 0.1~99.99 1.0 A

27 3I0_CBF ON:Bay10 0000~0001 0000 N/A

28 Ip_CBF:Bay10 0.1~99.99 1.0 A

29 3I0_CBF:Bay10 0.1~99.99 1.0 A

30 3I0_CBF ON:Bay11 0000~0001 0000 N/A

31 Ip_CBF:Bay11 0.1~99.99 1.0 A

32 3I0_CBF:Bay11 0.1~99.99 1.0 A

33 3I0_CBF ON:Bay12 0000~0001 0000 N/A

34 Ip_CBF:Bay12 0.1~99.99 1.0 A

35 3I0_CBF:Bay12 0.1~99.99 1.0 A


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36 3I0_CBF ON:Bay13 0000~0001 0000 N/A

37 Ip_CBF:Bay13 0.1~99.99 1.0 A

38 3I0_CBF:Bay13 0.1~99.99 1.0 A

39 3I0_CBF ON:Bay14 0000~0001 0000 N/A



40 Ip_CBF:Bay14 0.1~99.99 1.0 A

41 3I0_CBF:Bay14 0.1~99.99 1.0 A

42 3I0_CBF ON:Bay15 0000~0001 0000 N/A

43 Ip_CBF:Bay15 0.1~99.99 1.0 A

44 3I0_CBF:Bay15 0.1~99.99 1.0 A

45 3I0_CBF ON:Bay16 0000~0001 0000 N/A

46 Ip_CBF:Bay16 0.1~99.99 1.0 A

47 3I0_CBF:Bay16 0.1~99.99 1.0 A

48 3I0_CBF ON:Bay17 0000~0001 0000 N/A

49 Ip_CBF:Bay17 0.1~99.99 1.0 A

50 3I0_CBF:Bay17 0.1~99.99 1.0 A

51 3I0_CBF ON:Bay18 0000~0001 0000 N/A

52 Ip_CBF:Bay18 0.1~99.99 1.0 A

53 3I0_CBF:Bay18 0.1~99.99 1.0 A

54 3I0_CBF ON:Bay19 0000~0001 0000 N/A

55 Ip_CBF:Bay19 0.1~99.99 1.0 A

56 3I0_CBF:Bay19 0.1~99.99 1.0 A

57 3I0_CBF ON:Bay20 0000~0001 0000 N/A

58 Ip_CBF:Bay20 0.1~99.99 1.0 A

59 3I0_CBF:Bay20 0.1~99.99 1.0 A

3I0_CBF ON:Bayn is a special control word for each bay. 3I0 can be activated or

deactivated by it.


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Table 19 Definition of 3I0_CBF ON for Bays

Bit “1” “0”

B.15~B.1 Not Used Not Used

B.0 3I0_CBF ON 3I0_CBF OFF

Bus coupler overcurrent protection

The bus coupler overcurrent protection settings are as Table 20, and these settings are

applicable to CSC-150 standard version software V2.00 and up version.

Table 20 Setting Sheet of the Bus Coupler Over-Current Protection


1 Ip_B/C O/C:Stage1 0.1~99.99 5.0 A

2 Tp_B/C O/C:Stage1 0~10 0.5 s

3 Ip_B/C O/C:Stage2 0.1~99.99 4.0 A


5 3I0_B/C O/C:Stage1 0.1~99.99 5.0 A

6 T0_B/C O/C:Stage1 0~10 0.5 s

7 3I0_B/C O/C:Stage2 0.1~99.99 4.0 A

8 T0_B/C O/C:Stage2 0~10 1.0 s


The bus coupler CB failure protection settings are as Table 21, and these settings are


Table 21 Setting Sheet of the Bus Coupler CB Failure Protection


1 I_CBF:B/C 0.1~99.99 1 A

2 T1_CBF:B/C 0~2 0.15 s

3 T2_CBF:B/C 0~2 0.25 s



Enter MainMenu–Settings and input the password to enter the sub-menu EquipPara. The



as Table 22.


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8 CT1_Ratio: Bay1 0~5000 120 N/A

9 CT2_Ratio: Bay1 0~5000 120 N/A

Table 22 Sheet of the Equipment Parameters (Contd.)


10 CT_Ratio: Bay2 0~5000 120 N/A

11 CT_Ratio: Bay3 0~5000 120 N/A

12 CT_Ratio: Bay4 0~5000 120 N/A

13 CT_Ratio: Bay5 0~5000 120 N/A

14 CT_Ratio: Bay6 0~5000 120 N/A

15 CT_Ratio: Bay7 0~5000 120 N/A

16 CT_Ratio: Bay8 0~5000 120 N/A

17 CT_Ratio: Bay9 0~5000 120 N/A

18 CT_Ratio: Bay10 0~5000 120 N/A

19 CT_Ratio: Bay11 0~5000 120 N/A

20 CT_Ratio: Bay12 0~5000 120 N/A

21 CT_Ratio: Bay13 0~5000 120 N/A

22 CT_Ratio: Bay14 0~5000 120 N/A

23 CT_Ratio: Bay15 0~5000 120 N/A

24 CT_Ratio: Bay16 0~5000 120 N/A

25 CT_Ratio: Bay17 0~5000 120 N/A

26 CT_Ratio: Bay18 0~5000 120 N/A

27 CT_Ratio: Bay19 0~5000 120 N/A

28 CT_Ratio: Bay20 0~5000 120 N/A


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1 I_Diff 0.1~99.99 1.0 A

2 K_Diff 0.3~0.99 0.6 N/A

3 I_CTFail:Alarm 0.01~99.99 0.5 A

4 I_CTFail:Block 0.01~99.99 0.5 A








3 3I0_CBF ON:Bay2 0000~0001 0000 N/A

4 Ip_CBF:Bay2 0.1~99.99 1.0 A

5 3I0_CBF:Bay2 0.1~99.99 1.0 A

6 3I0_CBF ON:Bay3 0000~0001 0000 N/A

7 Ip_CBF:Bay3 0.1~99.99 1.0 A

8 3I0_CBF:Bay3 0.1~99.99 1.0 A

9 3I0_CBF ON:Bay4 0000~0001 0000 N/A

10 Ip_CBF:Bay4 0.1~99.99 1.0 A

11 3I0_CBF:Bay4 0.1~99.99 1.0 A

12 3I0_CBF ON:Bay5 0000~0001 0000 N/A

13 Ip_CBF:Bay5 0.1~99.99 1.0 A

14 3I0_CBF:Bay5 0.1~99.99 1.0 A

15 3I0_CBF ON:Bay6 0000~0001 0000 N/A

16 Ip_CBF:Bay6 0.1~99.99 1.0 A

17 3I0_CBF:Bay6 0.1~99.99 1.0 A

18 3I0_CBF ON:Bay7 0000~0001 0000 N/A

19 Ip_CBF:Bay7 0.1~99.99 1.0 A

20 3I0_CBF:Bay7 0.1~99.99 1.0 A

21 3I0_CBF ON:Bay8 0000~0001 0000 N/A


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22 Ip_CBF:Bay8 0.1~99.99 1.0 A

23 3I0_CBF:Bay8 0.1~99.99 1.0 A

24 3I0_CBF ON:Bay9 0000~0001 0000 N/A

25 Ip_CBF:Bay9 0.1~99.99 1.0 A

26 3I0_CBF:Bay9 0.1~99.99 1.0 A

27 3I0_CBF ON:Bay10 0000~0001 0000 N/A

28 Ip_CBF:Bay10 0.1~99.99 1.0 A

29 3I0_CBF:Bay10 0.1~99.99 1.0 A

30 3I0_CBF ON:Bay11 0000~0001 0000 N/A

31 Ip_CBF:Bay11 0.1~99.99 1.0 A

32 3I0_CBF:Bay11 0.1~99.99 1.0 A



33 3I0_CBF ON:Bay12 0000~0001 0000 N/A

34 Ip_CBF:Bay12 0.1~99.99 1.0 A

35 3I0_CBF:Bay12 0.1~99.99 1.0 A

36 3I0_CBF ON:Bay13 0000~0001 0000 N/A

37 Ip_CBF:Bay13 0.1~99.99 1.0 A

38 3I0_CBF:Bay13 0.1~99.99 1.0 A

39 3I0_CBF ON:Bay14 0000~0001 0000 N/A

40 Ip_CBF:Bay14 0.1~99.99 1.0 A

41 3I0_CBF:Bay14 0.1~99.99 1.0 A

42 3I0_CBF ON:Bay15 0000~0001 0000 N/A

43 Ip_CBF:Bay15 0.1~99.99 1.0 A

44 3I0_CBF:Bay15 0.1~99.99 1.0 A

45 3I0_CBF ON:Bay16 0000~0001 0000 N/A

46 Ip_CBF:Bay16 0.1~99.99 1.0 A

47 3I0_CBF:Bay16 0.1~99.99 1.0 A

48 3I0_CBF ON:Bay17 0000~0001 0000 N/A

49 Ip_CBF:Bay17 0.1~99.99 1.0 A

50 3I0_CBF:Bay17 0.1~99.99 1.0 A


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51 3I0_CBF ON:Bay18 0000~0001 0000 N/A

52 Ip_CBF:Bay18 0.1~99.99 1.0 A

53 3I0_CBF:Bay18 0.1~99.99 1.0 A

54 3I0_CBF ON:Bay19 0000~0001 0000 N/A

55 Ip_CBF:Bay19 0.1~99.99 1.0 A

56 3I0_CBF:Bay19 0.1~99.99 1.0 A

57 3I0_CBF ON:Bay20 0000~0001 0000 N/A

58 Ip_CBF:Bay20 0.1~99.99 1.0 A

59 3I0_CBF:Bay20 0.1~99.99 1.0 A


deactivated by it.


Bit “1” “0”




The bus coupler over current protection settings are as Table 30, and these settings are




1 Ip_B/C O/C:Stage1 0.1~99.99 5.0 A


3 Ip_B/C O/C:Stage2 0.1~99.99 4.0 A


5 3I0_B/C O/C:Stage1 0.1~99.99 5.0 A

6 T0_B/C O/C:Stage1 0~10 0.5 s

7 3I0_B/C O/C:Stage2 0.1~99.99 4.0 A

8 T0_B/C O/C:Stage2 0~10 1.0 s





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1 I_CBF:B/C 0.1~99.99 1 A

2 T1_CBF:B/C 0~2 0.15 s

3 T2_CBF:B/C 0~2 0.25 s



Enter Main Menu–Settings and input the password to enter the sub-menu EquipPara. The



as Table 32.










8 CT1_Ratio: Bay1 0~5000 120 N/A

9 CT2_Ratio: Bay1 0~5000 120 N/A

10 CT1_Ratio: Bay2 0~5000 120 N/A

11 CT2_Ratio: Bay2 0~5000 120 N/A

12 CT_Ratio: Bay3 0~5000 120 N/A

13 CT_Ratio: Bay4 0~5000 120 N/A

14 CT_Ratio: Bay5 0~5000 120 N/A

15 CT_Ratio: Bay6 0~5000 120 N/A

16 CT_Ratio: Bay7 0~5000 120 N/A

17 CT_Ratio: Bay8 0~5000 120 N/A

18 CT_Ratio: Bay9 0~5000 120 N/A

19 CT_Ratio: Bay10 0~5000 120 N/A

20 CT_Ratio: Bay11 0~5000 120 N/A

21 CT_Ratio: Bay12 0~5000 120 N/A

22 CT_Ratio: Bay13 0~5000 120 N/A

23 CT_Ratio: Bay14 0~5000 120 N/A


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24 CT_Ratio: Bay15 0~5000 120 N/A

25 CT_Ratio: Bay16 0~5000 120 N/A

26 CT_Ratio: Bay17 0~5000 120 N/A

27 CT_Ratio: Bay18 0~5000 120 N/A




























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1 I_Diff 0.1~99.99 1.0 A

2 K_Diff 0.3~0.99 0.6 N/A

3 I_CTFail:Alarm 0.01~99.99 0.5 A

4 I_CTFail:Block 0.01~99.99 0.5 A








3 3I0_CBF ON:Bay2 0000~0001 0000 N/A

4 Ip_CBF:Bay2 0.1~99.99 1.0 A

5 3I0_CBF:Bay2 0.1~99.99 1.0 A

6 3I0_CBF ON:Bay3 0000~0001 0000 N/A

7 Ip_CBF:Bay3 0.1~99.99 1.0 A

8 3I0_CBF:Bay3 0.1~99.99 1.0 A

9 3I0_CBF ON:Bay4 0000~0001 0000 N/A

10 Ip_CBF:Bay4 0.1~99.99 1.0 A

11 3I0_CBF:Bay4 0.1~99.99 1.0 A

12 3I0_CBF ON:Bay5 0000~0001 0000 N/A

13 Ip_CBF:Bay5 0.1~99.99 1.0 A

14 3I0_CBF:Bay5 0.1~99.99 1.0 A

15 3I0_CBF ON:Bay6 0000~0001 0000 N/A

16 Ip_CBF:Bay6 0.1~99.99 1.0 A

17 3I0_CBF:Bay6 0.1~99.99 1.0 A


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18 3I0_CBF ON:Bay7 0000~0001 0000 N/A

19 Ip_CBF:Bay7 0.1~99.99 1.0 A

20 3I0_CBF:Bay7 0.1~99.99 1.0 A

21 3I0_CBF ON:Bay8 0000~0001 0000 N/A

22 Ip_CBF:Bay8 0.1~99.99 1.0 A

23 3I0_CBF:Bay8 0.1~99.99 1.0 A

24 3I0_CBF ON:Bay9 0000~0001 0000 N/A

25 Ip_CBF:Bay9 0.1~99.99 1.0 A

26 3I0_CBF:Bay9 0.1~99.99 1.0 A

27 3I0_CBF ON:Bay10 0000~0001 0000 N/A

28 Ip_CBF:Bay10 0.1~99.99 1.0 A

29 3I0_CBF:Bay10 0.1~99.99 1.0 A

30 3I0_CBF ON:Bay11 0000~0001 0000 N/A



31 Ip_CBF:Bay11 0.1~99.99 1.0 A

32 3I0_CBF:Bay11 0.1~99.99 1.0 A

33 3I0_CBF ON:Bay12 0000~0001 0000 N/A

34 Ip_CBF:Bay12 0.1~99.99 1.0 A

35 3I0_CBF:Bay12 0.1~99.99 1.0 A

36 3I0_CBF ON:Bay13 0000~0001 0000 N/A

37 Ip_CBF:Bay13 0.1~99.99 1.0 A

38 3I0_CBF:Bay13 0.1~99.99 1.0 A

39 3I0_CBF ON:Bay14 0000~0001 0000 N/A

40 Ip_CBF:Bay14 0.1~99.99 1.0 A

41 3I0_CBF:Bay14 0.1~99.99 1.0 A

42 3I0_CBF ON:Bay15 0000~0001 0000 N/A

43 Ip_CBF:Bay15 0.1~99.99 1.0 A

44 3I0_CBF:Bay15 0.1~99.99 1.0 A

45 3I0_CBF ON:Bay16 0000~0001 0000 N/A

46 Ip_CBF:Bay16 0.1~99.99 1.0 A

47 3I0_CBF:Bay16 0.1~99.99 1.0 A


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48 3I0_CBF ON:Bay17 0000~0001 0000 N/A

49 Ip_CBF:Bay17 0.1~99.99 1.0 A

50 3I0_CBF:Bay17 0.1~99.99 1.0 A

51 3I0_CBF ON:Bay18 0000~0001 0000 N/A

52 Ip_CBF:Bay18 0.1~99.99 1.0 A

53 3I0_CBF:Bay18 0.1~99.99 1.0 A


deactivated by it.


Bit “1” “0”




The bus coupler overcurrent protection settings are as Table 40, and these settings are




1 Ip_B/C O/C:Stage1 0.1~99.99 5.0 A


3 Ip_B/C O/C:Stage2 0.1~99.99 4.0 A


5 3I0_B/C O/C:Stage1 0.1~99.99 5.0 A

6 T0_B/C O/C:Stage1 0~10 0.5 s

7 3I0_B/C O/C:Stage2 0.1~99.99 4.0 A

8 T0_B/C O/C:Stage2 0~10 1.0 s






1 I_CBF:B/C 0.1~99.99 1 A


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2 T1_CBF:B/C 0~2 0.15 s

3 T2_CBF:B/C 0~2 0.25 s

6.4 Annunciations

The following is the illustration for equipment alarm message.

Alarm I is severe alarm.

Alarm I is issued by CPU module. When alarm I happens, the alarm lamp on the front panel of

the equipment will flash, all of protection functions will be blocked.

Alarm II is other alarm.

Alarm II is issued by CPU module. When alarm II happens, the alarm lamp on the front panel of

the equipment will light continuously, and the equipment will alarm the corresponding abnormal

status, and will not block protection function.

Alarms issued by Master.

Generally the protection equipment has two CPU modules. The conformability of two CPU

modules in these items, for example, equipment parameters, setting group, setting etc., is

checked by Master. If some unconformity happens, Master will issue the relative alarm.

Alarms may result in blocking the protection.

There are some alarms, for example, DI failure, CT failure, isolator replica failure, which may

result in blocking the protection.

The alarm messages are listed as Table 42, Table 43, Table 44 and Table 45.

Table 42 Alarm I

S.N. Alarm Message Meaning Measures

1 EquipPara Err Equipment parameter is

error.

Set down equipment parameters again.

If it is inefficient, replacing the CPU

module is necessary.

2 ROM Verify Err Software downloading to

CPU is error.

Download the CPU firmware again. If it

is inefficient, replacing the CPU module

is necessary.

3 Setting Err Setting is error.

Set down protection settings and

equipment parameters again. If it is

inefficient, replacing the CPU module is

necessary.

4 Set Group Err Pointer of setting group Switch setting group. if it is inefficient,


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is error. replacing the CPU module is

necessary.

5 SysConfig Err System configuration is

error.

Download protection configuration

again.

6 DO EEPROM Err Software of DO module

is error.

Download the DO firmware again. If it is

inefficient, replacing the corresponding

digital output module is necessary.

Table 43 Alarm II


1 AI Err Analog input (AI) is

error. Regulate AI scale again.

2 Test DO Un-reset

Digital output

(DO)-test has not

been reset.

Press “RESET” key to reset the signal.

3 DI Breakdown Digital input (DI) is of

breakdown.

Check digital input status or replace

digital input module.

4 DI Input Err The input of digital

input (DI) is error.

Check output of the equipment power

supply or replace digital input module.

Table 43 Alarm II (Contd.)


5 NO/NC Discord

2-position input

discordance, i.e.

status of NC and NO

discord.

Check or replace digital input module.

6 DI Check Err

Self-checking circuit of

digital input (DI) is

error.

Check or replace digital input module.

7 DI EEPROM Err EEPROM of digital

input (DI) is error.

Replace the corresponding digital

input module.

8 DI Err Digital input (DI) is

error.

Check the corresponding digital input

external circuit and digital input

module.

9 DI Config Err Digital input

configuration is error.

Download protection configuration

again, which should be done by the

personnel from the factory.

10 DI Comm Fail Communication failure

in digital input (DI)

Check that digital input module is

inserted tightly, otherwise replace

digital input module.

11 DO Comm Fail Communication failure Check that digital output module is


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in digital output (DO) inserted tightly, otherwise replace

digital output module.

12 CAN Comm Fail CAN communication

failure

Check that protection CPU is inserted

tightly, otherwise replace protection

CPU module.

13 DO No Response Digital output (DO)

has no response.

Checks whether there is alarm I

blocking, which leads +24V missing,

otherwise replace the corresponding

digital output module.

14 DO Breakdown Digital output (DO) is

of breakdown.

Replace the corresponding digital

output module

15 VT Failure

VT is abnormal under

making Bus Voltage

Connected activated.

Check the primary and the secondary

voltage. If the primary voltage is

normal but the secondary is abnormal,

please check AI. If AI within all CPUs

is abnormal, the fault may happen in

the AI module and replacing the AI

module is necessary. If AI within one

CPU is abnormal, the fault may

happen in the A/D of CPU module and

replacing the CPU module is

necessary.

Table 44 Alarms issued by Master


1 Abnormality

CPU communicates

with Master

abnormally.

Check whether CPU or Master is

abnormal through the communication

message. If CPU doesn’t send

message, replacing CPU module is

necessary. If CPU sends message

normally, replacing Master module is

necessary.

2 EquipPara Discord

Equipment parameters

within CPU1 and CPU2

are different.

Set down equipment parameters again.

If it is inefficient, replacing CPU module

is necessary.

3 SetGroup Discord

Setting group within

CPU1 and CPU2 is

different.

Switch setting group again. If it is

inefficient, replacing CPU module is

necessary.

4 Setting Discord

Setting within CPU1

and CPU2 are

different.

Set down settings again. If it is

inefficient, replacing CPU module is

necessary.

5 Connt Discord Soft connectors within Download the soft connectors again. If


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CPU1 and CPU2 are

different.

it is inefficient, replacing CPU module is

necessary.

6 LON1 Comm Fail

If no LonWork net 1 is

configured in the

hardware of Master

module but it is

configured in the

software of Master

module, the alarm

LON1 Comm Fail will

be issued.

Enter the debug menu and keep the

configuration of LonWork net 1

conformance.

7 LON2 Comm Fail

If no LonWork net 2 is

configured in the

hardware of Master

module but it is

configured in the

software of Master

module, the alarm

LON2 Comm Fail will

be issued.

Enter the debug menu and keep the

configuration of LonWork net 2

conformance.

8 Connt Mode

Discord

Connector mode within

CPU1 and CPU2 is

different.

Enter the debug menu and switch

connector mode again. If it is inefficient,

replacing CPU module is necessary.

Table 44 Alarms issued by Master (Contd.)


9 Call Config Fail

Master calls the CPU

configuration including

AI, DI, DO, Equipment

parameter, Setting

etc., and the CPU

doesn’t answer it.

Power the equipment again. If it is

inefficient, please check the

communication between CPU and

Master. If CPU sends message to

Master normally, replacing Master

module is necessary. If CPU doesn’t

send message, replacing CPU module

is necessary.

10 PLC Verify Fail It is not used in CSC-150.

Table 45 Alarms may result in blocking the protection


1 START A-PH ERR

If DI for Phase A initiating

CBF has been existed for

long time (more than 2s),

the alarm will be issued

Check the corresponding digital input. If

the alarm can not disappear, replacing

the DI module is necessary.


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and the CBF initiated by

this DI will be blocked.

2 START B-PH ERR

If DI for Phase B initiating









3 START C-PH ERR

If DI for Phase C initiating









4 START 3-PH ERR

If DI for 3-Pole initiating









Table 45 Alarms may result in blocking the protection (Contd.)


5 CT Failure

If CT Fail Block ON is

activated and the

differential current is more

than I_CTFail:Block for

10s, the alarm will be

issued and the current

differential protection will

be blocked.

Check the primary and the secondary

current. If the primary curent is normal

but the secondary is abnormal, please

check AI. If AI within all CPUs is

abnormal, the fault may happen in the

AI module and replacing the AI module

is necessary. If AI within one CPU is

abnormal, the fault may happen in the

A/D of CPU module and replacing the

CPU module is necessary.

6 Isol Failure

When the normally open

contact and the normally

close contact of the same

isolator are all CLOSED or

OPEN, the alarm will be

issued. If Isol Fail Block

Protec is activated, the

Check the corresponding digital inputs.

If the alarm can not disappear,

replacing the DI module is necessary.


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current differential

protection will be blocked.


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7 Installation and commissioning

7.1 Unpacking & repacking

When dispatched from the factory, the equipment is packed in accordance with the

guidelines in IEC 60255-21 which specifies the impact resistance of packaging. This

packing shall be removed with care, without forcing to the equipment and without

using the inappropriate tools.

The equipment should be visually checked to ensure that there are no external

traces of damage. Verify that the conformity certificates, matched documents,

accessories are consistent with the order requirements, and ensure that the type,

nameplate, numbers of the equipments are perfect and consistent with packing list.

The transport packing can be re-used for further transport when applied in the same

way. The storage packing of the individual equipments is not suited to transport. If

alternative packing is used, this must also provide the same degree of protection

against mechanical shock, as laid down in IEC 60255-21-1 class 2 and IEC

60255-21-2 class 1.

Before initial energizing with power supply, the equipment shall be situated in the

operating area for at least two hours in order to ensure temperature equalization and

to avoid humidity influences and condensation.

7.2 Mounting

Fix the equipment on the panel or cabinet and firm every connection bolt of the

equipment.

Earth the equipment and the panel (cabinet) with copper wire and verify the earthing

is reliably.

Check the connection.

Ensure the equipment wiring to meet the requirements of wiring scheme.

7.3 Check before power on

Pull out all the modules, check-up whether the mechanical structure accessory on the

board becomes flexible or there are mechanical damages and whether the wiring is

fastness.

Check the man-machine interface is connected with faceplate reliable.

Check the type tag of the equipment on faceplate, the lighting tag, backboard terminal

diagram, terminal number tag and nameplate label of the equipment are intact and


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right.

Each module withdrawal and insertion are flexible, space between module and plug

slot are suitable right, and the insertion depth is satisfied. Verify the lock-up is reliable.

The slice of current connector for short circuit ought to be opened reliably when

module is inserted.

Test insulation resistance in turn between analog circuits and ground, and the circuits

to each others every resistance should not be less than 100 MΩ.

Connect the 8U box with 4U box through a special cable.

7.4 Check with power on

Power supply check

Test the output voltage and its stability. Every class output voltage should be maintained

stably as shown in Table 46 when the input voltage of DC power supply is rated.

Table 46

Rating voltage (V) Permissive range (V)

+5 5.0∼5.15

+12 9.6∼12.0

−12 −12.0∼−9.6

+24 24.0∼25.2

R24V 24.0∼25.92

Give alarm after power off

Energized DC power supply, the equipment for loss of power alarm should be excited

reliably, and its contacts X9/a14-c14, a16-c16 and X14/a14-c14, a16-c16 should be

opened reliably. Cut off rating DC power supply, the relay for loss of power alarm should

be lost magnetism reliably, and its contacts X9/a14-c14, a16-c16 and X14/a14-c14,

a16-c16 should be closed reliably.

7.5 Configuration of functions

7.5.1 Observing after power on

Under the condition that the power is turned off, insert all modules according to the modules

layouts of protection box (refer to Fig.3 and Fig.4) in Chapter 4.1 of the manual, and then

connect the flat cables between the front panel and the Master module. Turn on the DC power,

the LED “Run” should light and the LCD display should be normal. For Model 1, Model 2 and

Model 3, the LCD display is different.


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7.5.1.1 The LCD display of Model 1

For Model 1, take single busbar with a bus coupler arrangement as example: when the

equipment works normally, the LCD shows the busbar configuration and correlative analog

quantities on separate screens. On the first screen, the real time clock of the equipment is

shown in the first row, the following rows show the running mode of the busbar configuration is

shown in the following rows. On the second screen, the real time clock of the equipment is

shown in the first row, the differential currents and restraint currents of the check zone, and the

bus-section selective zone of BZI and BZII for Phase A and Phase B separately are shown in

the following six rows; and the current setting group number is shown in the eighth row. On the

third screen, the real time clock of the equipment is shown in the first row; the differential

currents and restraint currents of the check zone, the bus-section selective zone of BZI and

BZII for Phase C are shown in the following three rows; the eighth row shows the current

setting group number is shown in the eighth row. The meanings of the analog showed

recurrently are as Table 47:

Table 47 The LCD display of Model 1

Content shown on LCD Meanings

IACD=×.×× kA IAZD=×.×× kA The magnitudes of the differential and restraint currents

of phase A for the check zone

IACD1=×.×× kA IAZD1=×.×× kA The magnitudes of the differential and restraint currents

of phase A for the bus-section selective zone of BZI


of phase A for the bus-section selective zone of BZII

IBCD=×.×× kA IBZD=×.×× kA The magnitudes of the differential and restraint currents

of phase B for the check zone

IBCD1=×.×× kA IBZD1=×.×× kA The magnitudes of the differential and restraint currents

of phase B for the bus-section selective zone of BZI


of phase B for the bus-section selective zone of BZII

ICCD=×.×× kA ICZD=×.×× kA The magnitudes of the differential and restraint currents

of phase C for the check zone

ICCD1=×.×× kA ICZD1=×.×× kA The magnitudes of the differential and restraint currents

of phase C for the bus-section selective zone of BZI


of phase C for the bus-section selective zone of BZII


For Model 2, take double busbars arrangement as example: when the equipment works

normally, the LCD shows the busbar configuration and correlative analog quantities on

separate screens. On the first screen, the real time clock of the equipment is shown in the first


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row, the running mode of the busbar configuration is shown in the following rows. On the

second screen, the first row shows the real time clock of the equipment is shown in the first row,

the differential currents and restraint currents of the check zone, and the bus-section selective

zone of BZI and BZII for Phase A and Phase B separately are shown in the following six rows;

and the current setting group number is shown in the eighth row. On the third screen, the real

time clock of the equipment is shown in the first row; the differential currents and restraint

currents of the check zone, the bus-section selective zone of BZI and BZII for Phase C are

shown in the following three rows; the current setting group number is shown in the eighth row.

The meanings of the analog showed recurrently are as Table 48:


Content shown in LCD Meanings

IACD=×.×× kA IAZD=×.×× kA The magnitudes of the differential and restraint currents

of phase A for the check zone


of phase A for the bus-section selective zone of BZI


of phase A for the bus-section selective zone of BZII

IBCD=×.×× kA IBZD=×.×× kA The magnitudes of the differential and restraint currents

of phase B for the check zone


of phase B for the bus-section selective zone of BZI


of phase B for the bus-section selective zone of BZII

ICCD=×.×× kA ICZD=×.×× kA The magnitudes of the differential and restraint currents

of phase C for the check zone


of phase C for the bus-section selective zone of BZI


of phase C for the bus-section selective zone of BZII


For Model 3, when the equipment works normally, the LCD shows the busbar configuration and

correlative analog quantities on separate screens. On the first screen, the real time clock of the

equipment is shown in the first row and the running mode of the busbar configuration is shown

in the following rows. On the second screen, the real time clock of the equipment is shown in

the first row, the differential currents and restraint currents of the check zone, the bus-section

selective zone of BZI, BZII and BZT for Phase A and the differential currents and restraint

currents of the check zone and the bus-section selective zone BZI for Phase B are shown in

the following rows; the current setting group number is shown in the eighth row. On the third

screen, the real time clock of the equipment is shown in the first row; the differential currents


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and restraint currents of the bus-section selective zone BZII and BZT for Phase B and the

differential currents and restraint currents of the check zone, the bus-section selective zone BZI,

BZII and BZT for Phase C are shown in the following six rows, the current setting group

number is shown in the eighth row. The meanings of the analog showed recurrently are as

Table 49:


Content shown in LCD Meanings

IACD=×.×× kA IAZD=×.×× kA The magnitudes of the differential and restraint

currents of phase A for the check zone

IACD1=×.×× kA IAZD1=×.×× kA

The magnitudes of the differential and restraint

currents of phase A for the bus-section selective

zone of BZI




zone of BZII




zone of BZT

IBCD=×.×× kA IBZD=×.×× kA The magnitudes of the differential and restraint

currents of phase B for the check zone

IBCD1=×.×× kA IBZD1=×.×× kA


currents of phase B for the bus-section selective

zone of BZI




zone of BZII




zone of BZT

ICCD=×.×× kA ICZD=×.×× kA The magnitudes of the differential and restraint

currents of phase C for the check zone

ICCD1=×.×× kA ICZD1=×.×× kA


currents of phase C for the bus-section selective

zone of BZI




zone of BZII




zone of BZT

Note: Because the equipment is powered by double power supply, please make sure the

double power supply powered synchronously.


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7.5.2 Operation introduction

If you are familiar with the operation of the equipment, please ignore this section; otherwise

please read the Chapter 6.2 in the manual.

7.5.3 Setting down the equipment parameters

Press the SET key to enter the MainMenu–Settings–EquipPara and set the equipment

parameters correctly in the menu.

7.5.4 Equipment setup

Press the SET key to enter the MainMenu–Setup, and set bay name, regulating time mode,

communication address, SOE reset choice, protocol choice, printing setup, modifying password

and 103 function type correctly and respectively in the menu.

Press the SET key to enter the MainMenu–Set Time, and set the clock correctly in the menu.

Return to the normal display condition of the LCD, and observe that the equipment should run

normally. Turn off the power of the equipment for 5 minutes, then turn on it and check the time

and the date displayed on the LCD. The clock of equipment should keep running and show the

time precisely when the power is off.

7.6 Testing and commissioning

7.6.1 Inspecting the version and the CRC of software

The correctness of the software is judged through its CRC checkout code. Press the SET key

to enter the MainMenu, and then enter the OpStatus–EquipCode. Record the equipment type,

the software version number and the CRC checkout code, and check whether they are in

accordance with the version in effect.

7.6.2 Setting down protection settings and switching setting group

7.6.2.1 Setting down the protection settings

Press the SET key to enter the MainMenu–Settings–ProtSet. Enter the setting group 0, then

input setting according to the setting notice list and solidify it to the setting group 0.

7.6.2.2 Switching the setting group

Make sure that the current setting group is right in the items displayed recurrently on the LCD

panel. If it is wrong, press the SET key to enter the MainMenu– Testing–SwSetGrp and switch

the current setting group to right setting group. The setting group in effect of the busbar

protection is the setting group 0. Switching setting group is prohibited in running condition.


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7.6.3 Digital inputs test

The digital inputs mainly include 220V DC (or 110V DC) digital inputs and a few 24V DC digital

inputs. The 220V DC(or 110V DC) digital inputs includes the isolator replica, the initiations of

CB failure protection and the circuit breaker status. The 24V DC digital inputs include RESET

which is used to reset the alarm signal and other spare inputs.

The useful digital inputs and their status are all listed in the menu MainMenu – OpStatus – DI.

Confirm that the 220V DC or 110V DC digital input is in good condition by connecting or

disconnecting DC1+ to the tested digital input and inspecting the position change in the menu

MainMenu – OpStatus – DI. Confirm that the 24V DC digital input is in good condition by

connecting or disconnecting +24V to the tested digital input and inspecting the position change

in the menu MainMenu – OpStatus – DI.

7.6.4 Digital output Test

Press the SET key to enter the MainMenu, and then enter the Test DO and do the drive

experiment. When driving, the corresponding relay contacts of the equipment should trip with

lamp light signal, and the irrelative contacts shouldn’t trip. When you want to reset the digital

outputs that have been driven you should only press the Reset key on the front panel, the

corresponding relay contacts should return and the signal lamp should go out. For Model 1,

Model 2 and Model 3, the lists of digital output test are not the same. The list of digital output

test for Model 1 and Model 2 is as Table 50 and that for Model 3 as Table 51.

Table 50 The list of digital output test for Model 1 and Model 2

Digital Output Contacts and Signal LEDs Digital Output

Drive Revert

Alarm I

The LED “Alarm” is lighted and

flashes. The LED “Run” flashes.

The terminals X6/a2-a10 and c2-c10

are CLOSED.

The LED “Alarm” is turned off. The

LED “Run” is ever-light.


are OPEN.

Alarm II

The LED “Alarm” is lighted and the

LED “Run” flashes.


are CLOSED.

The LED “Alarm” is turned off and the



are OPEN.

CT Fail

The LED “CT Fail” is lighted and the


The terminals X6/a2-a6 and c2-c6 are

CLOSED.

The LED “CT Fail” is turned off and

the LED “Run” is ever-light.


OPEN.

Isol Fail

The LED “Iso Fail” is lighted and the



CLOSED.

The LED “Iso Fail” is turned off and



OPEN.


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Table 50 The list of digital output test for Model 1 and Model 2 (Contd.)


Drive Revert

Bus Tied

The LED “Bus Tied” is lighted and the



are CLOSED.

The LED “Bus Tied” is turned off and



are OPEN.

BZI Diff Op

The LED “Diff Op” is lighted and the



are CLOSED.

The LED “Diff Op” is turned off and



are OPEN.

BZII Diff Op




are CLOSED.




are OPEN.

BZI CBF Op

The LED “CBF Op” is lighted and the



are CLOSED.

The LED “CBF Op” is turned off and



are OPEN.

BZII CBF Op



The terminals X6/a22-a24 and

c22-c24 are CLOSED.




c22-c24 are OPEN.

B/C CBF Op




c22-c26 are CLOSED.




c22-c26 are OPEN.

B/C O/C Op

The LED “ B/C O/C Op” is lighted and

the LED “Run” flashes.


CLOSED.

The LED “B/C O/C Op” is lighted and



OPEN.

Trip Bay1

The LED “Run” flashes.

The terminals X15/a2-c2, a4-c4, a6-c6

and a8-c8 are CLOSED.

The LED “Run” is ever-light.

The terminals X15/a2-c2, a4-c4,

a6-c6 and a8-c8 are OPEN.

Trip Bay2



a14-c14 and a16-c16 are CLOSED.



Trip Bay3








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Drive Revert

Trip Bay4







Trip Bay5







Trip Bay6







Trip Bay7







Trip Bay8







Trip Bay9







Trip Bay10







Trip Bay11







Trip Bay12







Trip Bay13







Trip Bay14







Trip Bay15







Trip Bay16








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Drive Revert

Trip Bay17







Trip Bay18







Trip Bay19







Trip Bay20







Table 51 The list of digital output test for Model 3


Drive Revert

Alarm I

The LED “Alarm” is lighted and

flashes. The LED “Run” flashes.


are CLOSED.

The LED “Alarm” is turned off. The



are OPEN.

Alarm II

The LED “Alarm” is lighted and the



are CLOSED.

The LED “Alarm” is turned off and the



are OPEN.

CT Fail

The LED “CT Fail” is lighted and the



CLOSED.

The LED “CT Fail” is turned off and



OPEN.

Isol Fail

The LED “Iso Fail” is lighted and the



CLOSED.

The LED “Iso Fail” is turned off and



OPEN.

Bus Tied

The LED “Bus Tied” is lighted and the



are CLOSED.

The LED “Bus Tied” is turned off and



are OPEN.


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Table 51 The list of digital output test for Model 3 (Contd.)


Drive Revert

BZI Diff Op




are CLOSED.




are OPEN.

BZII Diff Op




are CLOSED.




are OPEN.

BZT Diff Op




are CLOSED.




are OPEN.

BZI CBF Op




c22-c24 are CLOSED.




c22-c24 are OPEN.

BZII CBF Op




c22-c26 are CLOSED.




c22-c26 are OPEN.

B/C CBF Op




c22-c28 are CLOSED.




c22-c28 are OPEN.

B/C O/C Op

The LED “ B/C O/C Op” is lighted and

the LED “Run” flashes.


CLOSED.

The LED “B/C O/C Op” is lighted and



OPEN.

Trip Bay1







Trip Bay2






Trip Bay3








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Drive Revert

Trip Bay4







Trip Bay5







Trip Bay6







Trip Bay7







Trip Bay8







Trip Bay9







Trip Bay10







Trip Bay11







Trip Bay12







Trip Bay13







Trip Bay14







Trip Bay15







Trip Bay16








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Drive Revert

Trip Bay17







Trip Bay18







7.6.5 Inspecting A/D conversion

Before test, please switch all the protection functions out of service.

The zero drift of the equipment has been adjusted before out of factory. When users

need to check, please use CSPC to call the sampling values of each CPU in the

event of any AC element not being injected. The sample value of the current circuit

should be within -0.1A~0.1A and the sample value of the voltage circuit should be

with -0.2V~0.2V.

According to the rear panel terminal drawing, connect all current circuits in series and

in ordinary polarity, then connect a 0.2 class (or 0.5 class) ammeter to this circuit in

series and inject into each circuit group by group with the rated alternating current.

According to the rear panel terminal drawing, connect all voltage circuits in parallel

and in the same polarity, then connect a 0.2 class (or 0.5 class) voltmeter to this

circuit in parallel and inject into UA1 and UN3 with 50V AC voltage.

Inject current and voltage. The voltage should lead the current 90 degrees. Press the

SET key to enter the MainMenu–OpStatus–Measure and view the magnitude and

phase of each AC unit. The magnitude show error should be less than 3% and the

phase show error should be less than 2 degrees. The magnitude of the current and

the voltage is the primary value.

7.6.6 The simulation test of short circuit fault for Model 1

7.6.6.1 The requirement for connecting AI and DI

For single busbar or one and a half CB arrangement, Bay1 is unusable. Bay1 is only

used as the bus coupler fixedly in single busbar with a bus coupler arrangement. So the

software deals with the AI, DI and DO of Bay1 specially.

For single busbar or one and a half CB arrangement, leave its AI inputs (BAY1 IA1/BAY1


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IB1/BAY1 IC1, BAY1 IA2/BAY1 IB2/BAY1 IC2), isolator replica inputs (BAY1 ISOL1-ON,

BAY1 ISOL1-OFF, BAY1 ISOL2-ON, BAY1 ISOL2-OFF), digital outputs (TRIP1: BAY1, TRIP2:

BAY1, TRIP3: BAY1, TRIP4: BAY1) spare and energize BAY1 CB status OPEN.

For single busbar with a bus coupler arrangement, the connection of AI is described below. The

isolator replica inputs may be connected to the equipment or not. They are only used to display

their status in the mimic. The software considers they are all on “ON”.

7.6.6.1.1 Analog Inputs

For Bay1, one CT or two CTs may be used. The currents BAY1 IA1/BAY1 IB1/BAY1 IC1 and

BAY1 IA2/BAY1 IB2/BAY1 IC2 are all for the bus coupler in single busbar with a bus coupler

arrangement. BAY1 IA1, BAY1 IB1 and BAY1 IC1 are for the bus selective zone BZI, BAY1

IA2, BAY1 IB2 and BAY1 IC2 are for the bus selective zone BZII. The connection diagrams are

illustrated as Fig. 30 and Fig. 31. But they are not useful for single busbar or one and a half CB

arrangement and should be left spare. The currents from BAY2 IA/BAY2 IB/BAY2 IC to BAY20

IA/BAY20 IB/BAY20 IC are all for the feeders.

CSC-150 BUS1

BUS2

BAY1

BAY2 BAY3


IB

IC






IN

Fig. 30 One CT and Its Connection to CSC-150 Model 1

CT

CT


-99-

7.6.6.1.2 Digital inputs

Connect the isolator replica one by one. For example, if Max Bays is set to 8, the isolator

replica should be connected from 1 to 8. If the bay j is running on BUS1, connect the bay j

isolator replica normally open contact with the CSC-150’s digital inputs BAY j ISOL1-ON, and

normally closed contact with BAY j ISOL1-OFF and leave the digital inputs BAY j ISOL2-ON

and BAY j ISOL2-OFF spare. If another bay k is running on BUS2, connect the bay k isolator

replica normally open contact with the CSC-150’s digital inputs BAY k ISOL2-ON, and normally

closed contact with BAY k ISOL2-OFF and leave the digital inputs BAY k ISOL1-ON and BAY

k ISOL1-OFF spare.

For single busbar with a bus coupler arrangement, connect the bus coupler CB normally open

auxiliary contact with BAY1 CB CLOSE, and the bus coupler CB normally close auxiliary

contact with BAY1 CB OPEN.

7.6.6.2 Differential protection (for Phase A, Phase B and Phase C separately)

Set Diff Protec ON in the setting sheet of differential protection.

7.6.6.2.1 Simulating external fault

For single busbar with a bus coupler arrangement, energize the bus coupler CB CLOSED, set

bay 2 running on BUS1 and bay 3 running on BUS2. Inject one current into bay 2, through the

bus coupler and out from bay 3. Any mal-operation and alarm signal is not permitted.

For single busbar or one and a half CB arrangement, energize the bus coupler CB OPEN, set

bay2 and bay 3 all running on BUS1 or BUS2. Inject one current into bay2 and out from bay3.

Any mal-operation and alarm signal is not permitted.

7.6.6.2.2 Simulating internal fault

CSC-150

BUS1

BUS2

BAY1

BAY2 BAY3


IB

IC






IN

Fig. 31 Two CTs and Their Connection to CSC-150 Model 1

CT1 CT1

CT2

IN

IA

IB

IC CT2

Note: The connection of two CTs in one side is same. Connection to CSC-150


-100-

For single busbar with a bus coupler arrangement, energize the bus coupler CB CLOSED, set

bay 2 running on BUS1 and bay 3 running on BUS2. Inject a current larger than I_Diff into bay

2 to simulate BUS1 internal fault. The differential protection should operate to isolate BUS1, trip

all bays which are running on BUS1. Inject a current larger than I_Diff into bay 3 to simulate

BUS2 internal fault. The differential protection should operate to isolate BUS2, trip all bays

which are running on BUS2.

For single busbar or one and a half CB arrangement, energize the bus coupler CB OPEN, set






The error of I_Diff should be less than ±5％. If the current is larger than 2 times I_Diff, the

operation time should be less than 15ms.

7.6.6.2.3 Inspecting the stabilization factor

Set bay 2 and bay 3 all running on BUS1 or BUS2. Inject one current I1 into bay 2 and another

current I2 into bay3 in the same phase. The polarity of two current is opposite. At first time, I1

should be equal to I2. Then fix one current and increase another one slowly to make differential

protection operate. When the differential protection operates, write down the two current values

and calculate the stabilization factor as II

II

21

21

−

+.

7.6.6.2.4 Simulating the dead zone fault

Note: For single busbar with a bus coupler arrangement, please do this item. For single

busbar or one and a half CB arrangement, please jump over it.

Bus coupler circuit breaker is CLOSED

During the differential protection operating, simulate the bus coupler CB from CLOSED to

OPEN, for example, connect one terminal of TRIP1: BAY1 to BAY1 CB OPEN and another

corresponding terminal of TRIP1: BAY1 to DC1+. Leave BAY1 CB CLOSE spare. (Note: An

alarm signal B/C CB Discord should be issued. The equipment considers the status of

bus coupler CB as CLOSED. It’ll not influence the operation of dead zone fault.). Set bay

3, bay 5 and bay 7 running on BUS1 and bay 4, bay 6 and bay 8 running on BUS2. Inject one

current larger than 0.1In into bay 5 and out from bay 7. Inject another current larger than 0.1In

into bay 4 and out from bay 6.

If one CT is used for the bus coupler and placed near to BUSI, inject the third current larger

than I_Diff into bay 3 and out from the bus coupler. The differential protection should operate to

isolate BUS2 first. When the fixed delay 150ms has elapsed and the bus coupler CB is OPEN,

the differential protection should operate to isolate BUS1 later.

If two CTs are used for the bus coupler, inject the third current larger than I_Diff into bay 3 and


-101-

out from the bus coupler’s CT2. The differential protection should operate to isolate BUS1 and

BUS2 at the same time.

Bus coupler circuit breaker is OPEN

Energize the bus coupler CB OPEN, for example, connect BAY1 CB OPEN to DC1+ and leave

BAY1 CB CLOSE spare. Set bay 3, bay 5 and bay 7 running on BUS1 and bay 4, bay 6 and

bay 8 running on BUS2. Inject one current larger than 0.1In into bay 5 and out from bay 7.

Inject another current larger than 0.1In into bay 4 and out from bay 6. Keep the state more than

2 seconds and do testing.


than I_Diff into bay 3 and out from the bus coupler. The differential protection should operate

only to isolate BUS1.


out from the bus coupler’s CT2. The differential protection should operate only to isolate BUS1.

7.6.6.3 Circuit breaker failure protection

Set CBF Protec ON to 1 in the setting sheet of circuit breaker failure protection control word.

Set bay 2 running on BUS1 and bay 3 running on BUS2. Set 3I0_CBF ON: Bay2 and 3I0_CBF

ON: Bay3 as 0001 (set 3I0_CBF ON).

Set Ip_CBF: Bay2 less than 3I0_CBF: Bay2. Inject a current larger than Ip_CBF: Bay2 but

less than 3I0_CBF: Bay2 to the phase A of bay 2. Connect START A-PH BAY2 or START

3-PH BAY2 to DC1+. When T_CBF: Stage1 has elapsed, the CB failure protection should

operate to trip bay 2 again. When T_CBF: Stage2 has elapsed, the CB failure protection

should operate to isolate BUS1, trip all bays which are running on BUS1. The operation of CBF

protection for phase B and phase C is same as that for phase A.

Set 3I0_CBF: Bay2 less than Ip_CBF: Bay2. Inject a current larger than 3I0_CBF: Bay2 but

less than Ip_CBF: Bay2 to the phase B of bay 2. Connect START A-PH BAY2 or START B-PH

BAY2 or START C-PH BAY2 or START 3-PH BAY2 to DC1+. When T_CBF: Stage1 has

elapsed, the CB failure protection should operate to trip bay 2 again. When T_CBF: Stage2

has elapsed, the CB failure protection should operate to isolate BUS1, trip all bays which are

running on BUS1.








less than Ip_CBF: Bay3 to the phase C of bay 3. Connect START A-PH BAY3 or START B-PH




running on BUS2.


-102-

The error of operating currents are less than ±5％.

Note: When the initiation of CB failure protection exists for more than 2s, the alarm

signal Start A-Ph Err or Start B-Ph Err or Start C-Ph Err or Start 3-Ph Err should be

issued. The CB failure protection initiated by the abnormal digital input should be

blocked.

7.6.6.4 Bus coupler over-current protection



Set CT1 As the B/C Main CT to 1 in the sheet of equipment parameters.

Set B/C O/C Protec ON to 1 in the setting sheet of bus coupler over-current protection control

word.

Set Iph Stage1 ON, Iph Stage2 ON, 3I0 Stage1 ON and 3I0 Stage2 ON to 1 in the setting

sheet of bus coupler over-current protection control word.

Set Ip_B/C O/C: Stage1 larger than Ip_B/C O/C: Stage2, Ip_B/C O/C: Stage2 larger than

3I0_B/C O/C: Stage1 and 3I0_B/C O/C: Stage1 larger than 3I0_B/C O/C: Stage2.

Inject a current larger than 3I0_B/C O/C: Stage2 but less than 3I0_B/C O/C: Stage1 to the bus

coupler CT1. When T0_CBF: Stage2 has elapsed, the B/C O/C protection should operate to

trip bay1.

Inject a current larger than 3I0_B/C O/C: Stage1 but less than Ip_B/C O/C: Stage2 to the bus


trip bay1. When T0_CBF: Stage2 has elapsed, the B/C O/C protection should operate to trip

bay1.

Inject a current larger than Ip_B/C O/C: Stage2 but less than Ip_B/C O/C: Stage1 to the bus

coupler CT1. When Tp_CBF: Stage2 has elapsed, the B/C O/C protection should operate to


bay1. When T0_CBF: Stage2 has elapsed, the B/C O/C protection should operate to trip bay1.

Inject a current larger than Ip_B/C O/C: Stage1 to the bus coupler CT1. When Tp_CBF:

Stage1 has elapsed, the B/C O/C protection should operate to trip bay1. When Tp_CBF:

Stage2 has elapsed, the B/C O/C protection should operate to trip bay1. When T0_CBF:


Stage2 has elapsed, the B/C O/C protection should operate to trip bay1.


7.6.6.5 Bus coupler circuit breaker failure





-103-

Set B/C CBF Protec ON to 1 in the setting sheet of bus coupler CB failure protection control

word.

Set I_CBF: B/C, T1_CBF: B/C and T2_CBF:B/C in the setting sheet of bus coupler CB failure

protection.

7.6.6.5.1 Differential protection initiates bus coupler circuit breaker failure protection

Set Diff Protec ON to 1 in the setting sheet of differential protection control word.

Set Diff Init B/C CBF ON to 1 in the setting sheet of bus coupler CB failure protection control

word.

Simulate the bus coupler CB CLOSED, for example, connect BAY1 CB CLOSE to DC1+, set

bay 3 running on BUS1 and bay 4 running on BUS2. Inject a current larger than I_Diff and

I_CBF: B/C into bay 3 and out from the bus coupler to simulate BUS2 internal fault. The

differential protection should operate to isolate BUS2. Keep the injecting current on. When the

time delay T1_CBF: B/C has elapsed, the bus coupler CB failure protection should operate to

trip the bus coupler CB again. Keeping the injecting current on, the bus coupler CB failure

protection should operate to isolate BUS1 and BUS2 after the time delay T2_CBF:B/C has

elapsed.

7.6.6.5.2 Bus coupler over-current protection initiates bus coupler circuit breaker failure

protection

Set B/C O/C Protec ON and Iph Stage1 ON to 1 in the setting sheet of bus coupler

over-current protection control word.

Set B/C O/C Init B/C CBF ON to 1 in the setting sheet of bus coupler CB failure protection

control word.


bay 3 running on BUS1 and bay 4 running on BUS2. Inject a current into bay 3, through the bus

coupler and out from bay 4 to simulate a balanced busbar system. Increase the current larger

than Ip_B/C O/C:stage1 and I_CBF: B/C to make the bus coupler over-current protection

operate. Keep the injecting current on. When the time delay T1_CBF: B/C has elapsed, the bus

coupler CB failure protection should operate to trip the bus coupler CB again. Keeping the

injecting current on, the bus coupler CB failure protection should operate to isolate BUS1 and

BUS2 after the time delay T2_CBF:B/C has elapsed.

7.6.6.5.3 External protection equipment initiates bus coupler circuit breaker failure protection

Set External Init B/C CBF ON to 1 in the setting sheet of bus coupler CB failure protection

control word.


bay 3 running on BUS1 and bay 4 running on BUS2. Inject a current larger than I_CBF: B/C

into bay 3, through the bus coupler and out from bay 4 to simulate a balanced busbar system.

Keep the injecting current on and connect START 3-PH BAY1 to DC1+. When the time delay

T1_CBF: B/C has elapsed, the bus coupler CB failure protection should operate to trip the bus

coupler CB again.


-104-

Keeping the injecting current and START 3-PH BAY1 on, the bus coupler CB failure protection

should operate to isolate BUS1 and BUS2 after the time delay T2_CBF:B/C has elapsed.

7.6.6.6 Isolator failure

For an isolator replica of any bay except bay 1, if the normally open contact and normally close

contact are all in ON or OFF position, the alarm signal Isol Fail should be issued after a fixed

delay 2s has elapsed. When set Isol Fail Block Protec to 0 in the sheet of equipment

parameters, the equipment remember the old status to operate. When set Isol Fail Block

Protec to 1 in the sheet of equipment parameters, the equipment should block the differential

protection.

7.6.6.7 CT failure


Set I_CTFail: Alarm and I_CTFail: Block less than I_Diff.

Set CT Fail Alarm ON to 1 in the setting sheet of differential protection control word. Inject a

current larger than I_CTFail: Alarm to a running bay except the bus coupler. When a fixed

delay 10s has elapsed, the alarm signal CT Fail should be issued. Then increase the current to

be larger than I_Diff and the differential protection should operate to isolate the bus on which

the injected feeder is running.

Set CT Fail Block ON to 1 in the setting sheet of differential protection control word. Inject a

current larger than I_CTFail: Block to a running bay except the bus coupler. When a fixed


be larger than I_Diff and the differential protection should not operate.

7.6.6.8 VT failure

Set Bus Voltage Connected to 1 in the sheet of equipment parameters. The equipment should

detect whether the VT fails. The criterions of VT failure are described as follows:

1) 3-pole VT failure

The voltage values of phase A, phase B and phase C are all less than 8V but the busbar is

running on.

2) Single phase or two phase VT failure


The alarm signal VT Fail should be issued after any criterion is met for 10s. The VT failure does

not influence the protection functions.




The currents BAY1 IA1/BAY1 IB1/BAY1 IC1 and BAY1 IA2/BAY1 IB2/BAY1 IC2 are all for the


-105-

bus coupler in Model 2. BAY1 IA1, BAY1 IB1 and BAY1 IC1 are for the bus selective zone BZI,

BAY1 IA2, BAY1 IB2 and BAY1 IC2 are for the bus selective zone BZII. The currents from

BAY2 IA/BAY2 IB/BAY2 IC to BAY20 IA/BAY20 IB/BAY20 IC are all for feeders.

For the bus coupler, one CT or two CTs may be used. The connection diagrams are illustrated

as Fig. 32 and Fig. 33.



replica should be connected from 1 to 8. If the bay j is running on BUS1, BAYj ISOL1-ON and

BAYj ISOL2-OFF should be on ON and BAYj ISOL1-OFF and BAYj ISOL2-ON should be on

OFF.

Connect the bus coupler CB normally open auxiliary contact with BAY1 CB CLOSE, and the

bus coupler CB normally close auxiliary contact with BAY1 CB OPEN. When the CB are

CSC-150 BUS1

BUS2

BAY1

BAY2 BAY3


IB

IC






IN

Fig. 33 Two CTs and Their Connection to CSC-150 Model 2

CT1 CT1

CT2

IN

IA

IB

IC CT2

Note: The connection of two CTs in one side is same. Connection to CSC-150

CSC-150 BUS1

BUS2

BAY1

BAY2 BAY3


IB

IC






IN

Fig. 32 One CT and Its Connection to CSC-150 Model 2

CT

CT


-106-

CLOSED, BAY1 CB CLOSE is ON and BAY1 CB OPEN is OFF. Otherwise BAY1 CB CLOSE

is OFF and BAY1 CB OPEN is ON.


Set Diff Protec ON to 1 in the setting sheet of differential protection.


Simulate the bus coupler CB CLOSED, for example, connect BAY1 CB CLOSE to DC1+. Set

















and calculate the stabilization factor as II

II

21

21

−

+.

7.6.7.2.4 Inspecting the performance while two busbars are tied


bay 2 running on BUS1 and BUS2 (BAY2 ISOL1-ON and BAY2 ISOL2-ON are on ON and

BAY2 ISOL1-OFF and BAY2 ISOL2-OFF are on OFF). Set bay 3 running on BUS1. Inject a

current larger than I_Diff into bay 3 to simulate BUS1 internal fault. The differential protection

should operate to isolate BUS1 and BUS2, trip all bays which are running on BUS1 and BUS2.


bay 2 running on BUS1 and BUS2 (BAY2 ISOL1-ON and BAY2 ISOL2-ON are on ON and

BAY2 ISOL1-OFF and BAY2 ISOL2-OFF are on OFF). Set bay 3 running on BUS2. Inject a

current larger than I_Diff into bay 3 to simulate BUS2 internal fault. The differential protection

should operate to isolate BUS1 and BUS2, trip all bays which are running on BUS1 and BUS2.


-107-



During the differential protection operating, simulate the bus coupler CB from CLOSED to


corresponding terminal of TRIP1: BAY1 to DC1+. Leave BAY1 CB CLOSE spare. (Note: An














Energize the bus coupler CB OPEN, for example, connect BAY1 CB OPEN to DC1+ and leave

BAY1 CB CLOSE spare. Set bay 3, bay 5 and bay 7 running on BUS1 and bay 4, bay 6 and

bay 8 running on BUS2. Inject one current larger than 0.1In into bay 5 and out from bay 7.

Inject another current larger than 0.1In into bay 4 and out from bay 6. Keep the state more than

2 seconds and do testing.

If one CT is used for the bus coupler and place near to BUSI, inject the third current larger than

I_Diff into bay 3 and out from the bus coupler. The differential protection should operate only to

isolate BUS1.





Set bay 2 running on BUS1 and bay 3 running on BUS2. Set 3I0_CBF ON: Bay2 and 3I0_CBF

ON: Bay3 as 0001 (set 3I0_CBF ON).









-108-





running on BUS1.












running on BUS2.





blocked.




word.







trip bay1.




bay1.







-109-









word.


protection.




word.








elapsed.


protection




control word.










-110-



control word.






coupler CB again. Keeping the injecting current and START 3-PH BAY1 on, the bus coupler CB

failure protection should operate to isolate BUS1 and BUS2 after the time delay T2_CBF:B/C

has elapsed.


For an isolator replica of any bay, if the normally open contact and normally close contact are all

in ON or OFF position, the alarm signal Isol Fail should be issued after a fixed delay 2s has

elapsed. When set Isol Fail Block Protec to 0 in the sheet of equipment parameters, the

equipment remember the old status to operate. When set Isol Fail Block Protec to 1 in the

sheet of equipment parameters, the equipment should block the differential protection

according to the bus selective section.

7.6.7.7 CT failure






be larger than I_Diff and the differential protection should operate to isolate the bus on which

the injected feeder is running.





7.6.7.8 VT failure





running on.




-111-





7.6.8.1.1 Busbar arrangement

Two main & one transfer bus arrangement is illustrated as Fig. 34.


The currents BAY1 IA1/BAY1 IB1/BAY1 IC1 and BAY1 IA2/BAY1 IB2/BAY1 IC2 are all for the

bus coupler. BAY1 IA1, BAY1 IB1 and BAY1 IC1 are for the bus selective zone BZI, BAY1 IA2,

BAY1 IB2 and BAY1 IC2 are for the bus selective zone BZII. The BAY2 IA1/BAY2 IB1/BAY2

IC1 and BAY2 IA2/BAY2 IB2/BAY2 IC2 are all for the transfer bus coupler. BAY2 IA1, BAY2

IB1and BAY2 IC1 are for the bus selective zone BZI or BZII, BAY2 IA2, BAY2 IB2 and BAY2

IC2 are for the bus selective zone of the transfer bus BZT. The currents from BAY3 IA/BAY3

IB/BAY3 IC to BAY18 IA/BAY18 IB/BAY18 IC are all for the feeders.

For the bus coupler, one CT or two CTs may be used. The connection diagrams are illustrated

as Fig. 35 and Fig. 36.

BUS1

BUS2

BAY1

BAY2

BAYn

Fig. 34 The Bus Arrangement Supported by CSC150 Model 3

CT

BUST

BC

TBC

BAY3


-112-

For the transfer bus coupler, one CT or two CTs may be used. The connection diagrams are

illustrated as Fig. 37 and Fig. 38.

BUS1

BUS2

BUST

BAY2

BAY3

Fig. 36 Two CTs for Bus Coupler and Theirs Connection to CSC-150 Model 3

BAY1


IB

IC






IN

CT1

CT1

CSC-150

CT2 IN

IA

IB

IC CT2

BUS1

BUS2

BUST

BAY1

BAY2

BAY3


IB

IC






IN

Fig. 35 One CT for Bus Coupler and Its Connection to CSC-150 Model 3

CT

CT

CSC-150


-113-



replica should be connected from 1 to 8. For bus coupler, only BAY1 ISOL1-ON, BAY1

ISOL1-OFF, BAY1 ISOL2-ON and BAY1 ISOL2-ON are valid. For the other bays, if the bay j is

running on BUS1, BAYj ISOL1-ON, BAYj ISOL2-OFF and BAYj ISOL3-OFF are on ON and

BAYj ISOL1-OFF, BAYj ISOL2-ON and BAYj ISOL3-ON are on OFF.

Connect the bus coupler CB normally open auxiliary contact with BAY1 CB CLOSE, and the

bus coupler CB normally close auxiliary contact with BAY1 CB OPEN. When the bus coupler

CB is CLOSED, BAY1 CB CLOSE is on ON and BAY1 CB OPEN is on OFF.

BUS1

BUS2

BUST

BAY2

BAY3

Fig. 38 Two CTs for Transfer Bus Coupler and Theirs Connection to CSC-150 Model 3

BAY1


IB

IC






IN

CT3

CT3

CSC-150

CT4

IN

IA

IB

IC CT4

BUS1

BUS2

BUST

BAY1

BAY2

BAY3


IB

IC






IN

Fig. 37 One CT for Transfer Bus Coupler and Its Connection to CSC-150 Model 3

CT

CT

CSC-150


-114-

When the bus coupler CB is OPEN, BAY1 CB CLOSE is on OFF and BAY1 CB OPEN is on

ON.

Connect the transfer bus coupler CB normally open auxiliary contact with BAY2 CB CLOSE,

and the transfer bus coupler CB normally close auxiliary contact with BAY2 CB OPEN. When

the transfer bus coupler CB is CLOSED, BAY2 CB CLOSE is on ON and BAY2 CB OPEN is

on OFF. When the transfer bus coupler CB is OPEN, BAY2 CB CLOSE is on OFF and BAY2

CB OPEN is on ON.















bay 2 running on BUS1 and transferring bay 3. At that time BAY2 ISOL1-ON, BAY2

ISOL2-OFF, BAY2 ISOL3-ON, BAY3 ISOL1-OFF, BAY3 ISOL2-OFF and BAY3 ISOL3-ON

are on ON and BAY2 ISOL1-OFF, BAY2 ISOL2-ON, BAY2 ISOL3-OFF, BAY3 ISOL1-ON,

BAY3 ISOL2-ON and BAY3 ISOL3-OFF are on OFF. Inject a current larger than I_Diff into bay

3 to simulate BUST internal fault. The differential protection should operate to isolate BUST.








and calculate the stabilization factor as K. II

II

21

21

−

+.

7.6.8.2.4 Inspecting the performance while two busbars are tied



-115-

bay 3 running on BUS1 and BUS2 (BAY3 ISOL1-ON, BAY3 ISOL2-ON and BAY3 ISOL3-OFF

are on ON and BAY3 ISOL1-OFF, BAY3 ISOL2-OFF and BAY3 ISOL3-ON are on OFF.). Set

bay 4 running on BUS1. Inject a current larger than I_Diff into bay 4 to simulate BUS1 internal

fault. The differential protection should operate to isolate BUS1 and BUS2, trip all bays which

are running on BUS1 and BUS2.


bay 3 running on BUS1 and BUS2 (BAY3 ISOL1-ON, BAY3 ISOL2-ON and BAY3 ISOL3-OFF

are on ON and BAY3 ISOL1-OFF, BAY3 ISOL2-OFF and BAY3 ISOL3-ON are on OFF.). Set

bay 4 running on BUS2. Inject a current larger than I_Diff into bay 4 to simulate BUS2 internal

fault. The differential protection should operate to isolate BUS1 and BUS2, trip all bays which

are running on BUS1 and BUS2.



During the differential current protection operating, simulate the bus coupler from CLOSED to


corresponding terminal of TRIP1: BAY1 to DC1+. Leave BAY1 CB CLOSE spare (Note: An














Simulate the bus coupler OPEN, for example, connect BAY1 CB OPEN to DC1+. Set bay 3,

bay 5 and bay 7 running on BUS1 and bay 4, bay 6 and bay 8 running on BUS2. Inject one


into bay 4 and out from bay 6. Keep the state more than 2 seconds and do testing.


than I_Diff into bay 3 and out from the bus coupler. The differential protection should operate

only to isolate BUS1.




-116-



Simulate the bus coupler CLOSED, for example, connect BAY1 CB CLOSE to DC1+. Set bay

3 running on BUS1 and bay 4 running on BUS2. Set 3I0_CBF ON: Bay3 and 3I0_CBF ON:

Bay4 as 0001 (set 3I0_CBF ON).












running on BUS1.












running on BUS2.





blocked.




word.




-117-





trip bay1.




bay1.














word.


protection.




word.








elapsed.


-118-


protection




control word.











control word.






coupler CB again. Keeping the injecting current and START 3-PH BAY1 on, the bus coupler CB

failure protection should operate to isolate BUS1 and BUS2 after the time delay T2_CBF:B/C

has elapsed.


For an isolator replica of any bay, if the normally open contact and normally close contact are all

in ON or OFF position, the alarm signal Isol Fail should be issued after a fixed delay 2s has

elapsed. When set Isol Fail Block Protec to 0 in the sheet of equipment parameters, the

equipment remember the old status to operate. When set Isol Fail Block Protec to 1 in the

sheet of equipment parameters, the equipment should block the differential protection

according to the bus selective section.

7.6.8.7 CT failure





delay 10s has elapsed, the alarm signal CT Fail should be issued.


-119-

Then increase the current to be larger than I_Diff and the differential protection should operate

to isolate the bus on which the injected feeder is running.





7.6.8.8 VT failure





running on.





7.7 Switch the protection into service

7.7.1 The preparation before switching the protection into service

Inject current into current transformer and check whether the CT ratio is consistent with the

equipment parameter;

Ensure that the phase type and polarity of the current connected into the equipment is

right;

The polarity of all of the bays connected to the busbar should be consistent completely;

Switch DC power supply into service, the LED Run should light and the other signal lamps

should go out;

Check the protection setting list. If they are all right, file them.

7.7.2 The check items when with load

Check the big differential currents of phase A, phase B and phase C and the differential

current of each section of busbar are balanceable.

Check that the busbar arrangement displayed on LCD corresponds with the actual running

mode.

After affirming that there are no problems, switch the needed protection function into service.


-120-

8 Maintenance

8.1 Routine checks

Inspect insulating resistance;

Inspect DC output voltage in every class;

Check printer when printer is used;

Adjust zero drift and scale;

Verify signal outputs;

Verify digital inputs;

Verify trip outputs with circuit breaker;

Check setting.

8.2 Fault tracing

The equipment may test all hardware components itself, including loop out of the relay coil.

Watch can find whether or not the equipment is in fault through warning lights and warning

characters which shows in liquid crystal display and print reports to tell fault location and

kind.

The method of eliminating fault is replacing fault board or eliminating external fault.


-121-

9 Storage and Transport

The suitable storage temperature for the equipment is -100C~+40

0C and the comparatively

humidity is less than 80%. The storage indoor air should not contain corrosive or exploding

goods. In the process of transport, server shake and collision is strictly prohibited.


-122-

10 Selection and orderin

g data

CSC150 Numerical Busbar Protection Equipment

Model Nos.

Single Busbar, Single Busbar with a Bus Coupler, One and a half CB,

Maximum Bay is 20 - Model M1

Main Double Busbar, 1 Main + 1 Transfer Busbar, 1 Main +

1 Main / 1 Transfer Busbar, Maximum Bay is 20 - Model M2

Main Double and one Transfer Busbar with the CTs are on the side of

feeders, Maximum Bay is 18 - Model M3

Rated Current

1A

5A

Rated Axuliary Voltage

110V DC

220V DC

Master Module Type, Different Hardware

087

125

Electrical Internet or Fibre Internet Interface on Master Module (2 Ports)

A (Electrical)

B (Fibre)

RS485 Interface on Master Module

1

2

Order No.

CSC150

M3

M2

M1

1

5

1

2

W

K

W

A

B

1

2


-123-

11 Appendix

11.1 Hardware structure of CSC-150 Model 1, Model 2 and Model 3

Fig.39 Hardware structure of CSC-150 for Model 1

CSC-150

CPU

Digital inputs

ME

Power supply

AE

RS 232

Personal Computer

Ethernet/RS 485

Control Centre

Trip relay

Trip relay

Signal relay

Signal relay CPU

AE


-124-

CPU


Digital inputs

ME

Power supply

AE

RS 232

Personal Computer

Ethernet/RS 485

Control Centre

Trip relay

Trip relay

Signal relay

Signal relay CPU

AE

CSC-150


-125-

CSC-150

CPU


Digital inputs

ME

Bus 1

AE

RS

232

Personal Computer

Ethernet/RS 485

Control Centre

Trip relay

Trip relay

Signal relay

Signal relay CPU

AE

Power supply

Bus 2

Transfer Bus


-126-

11.2 The rear view of the equipment rear panel

32 pins socket

32 pins socket

32 pins socket

32 pins socket

16 pins socket

32 pins socket

22 pins socket

22 pins socket

22 pins socket

22 pins socket

X1

AI 1

22 pins socket

22 pins socket

22 pins socket

22 pins socket

X18

DO 3

X19

DO 3

32 pins socket

32 pins socket

32 pins socket

32 pins socket

32 pins socket

32 pins socket

32 pins socket

32 pins socket

32 pins socket

32 pins socket

32 pins socket

X14

POWER

X9

POWERX7

MASTERX5

DI 1X6

DO 4

X20

DI 2

X21

DI 3

X27

DI 8

X25

DI 7

X24

DI 6

X23

DI 5

X22

DI 4

X17

DO 2

X16

DO 1

X15

DO 1

X2

AI 2

X3

AI 3

X4

AI 4

X10

AI 5

X11

AI 6

X12

AI 7

X13

AI 8

X8

CAN INTERFACE

X26

CAN INTERFACE

Fig.42 The rear view of the equipment rear panel


-127-

11.3 The front view of 8U protection box

F1

-+

F4F2

F3

SIO

SET

QUIT

CSC-

150

RESET

Fig.43 The front view of CSC-150


-128-

11.4 The rear panel terminal diagram of CSC-150 for Model 1

1615141312111098765

68

24

42

86

2

64

8

Fig.44 The rear panel terminal diagram of 8U protection box for Model 1


-129-

X20 (DI MODULE)c a

2

64

88

46

2ac

X21 (DI MODULE)X22 (DI MODULE)c a

2

64

88

46

2ac


2

64

88

46

2ac


2

64

8

(CAN INTERFACE)X26



-130-


1615141312111098765

68

24

42

86

2

64

8



-131-

X20 (DI MODULE)c a

2

64

88

46

2ac


2

64

88

46

2ac


2

64

88

46

2ac


2

64

8

(CAN INTERFACE)X26



-132-


1615141312111098765

68

24

42

86

2

64

8



-133-

X20 (DI MODULE)c a

2

64

88

46

2ac


2

64

88

46

2ac


2

64

88

46

2ac


2

64

8

(CAN INTERFACE)X26


er csc150 manual

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