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CSC-121Breaker Protection IED

Product Guide

Version V1.10Doc. Code: 0SF.492.053(E)Issued Date 2012.8Copyright owner: Beijing Sifang Automation Co., Ltd.

Note: The company keeps the right to perfect the instruction. If equipments do not agree with the instruction at anywhere, please contact our company in time. We will provide you with corresponding service.

® is registered trademark of Beijing Sifang Automation Co., Ltd. We reserve all rights to this document, even in the event that a patent is issued and a different commercial proprietary right is registered. Improper use, in particular reproduction and dissemination to third parties, is not permitted.

This document has been carefully checked. If the user nevertheless detects any errors, he is asked to notify us as soon as possible.

The data contained in this manual is intended solely for the IED description and is not to be deemed to be a statement of guaranteed properties. In the interests of our customers, we constantly seek to ensure that our products are developed to the latest technological standards as a result; it is possible that there may be some differences between the hardware/software product and this information product.

Manufacturer:Beijing Sifang Automation Co., Ltd.

Overview

1

Overview

The CSC-121 is selective, reliable and

high speed breaker management and

backup protection IED (Intelligent

Electronic Device), which is used as

backup protection cooperating with main

protection in different applications such as

overhead line, cable, transformer, reactor

and busbar protection. It can also work as

a dedicated breaker management relay for

circuit breaker.

The IED has powerful capabilities to cover

following applications:

Used in a wide range of voltage levels,

up to 1000kV

Applied to overhead lines and cables,

as backup protection IED

Applicable in subtransmission network

and distribution network

Applied to transformer as backup

protection IED

Breaker management protection for

any substation arrangement such as

one and half breakers arrangement,

double bus arrangement, etc.

Work as a dedicated breaker

protection for single circuit breaker

Suitable for single pole/three poles

tripping and closing conditions

Communication with station automation

system

The IED provides a completely protection

functions library, including current

protection, voltage protection, auto-

-reclosing, breaker failure protection,

thermal overload protection, etc., to cover

most of the requirements of different

applications.

The wide application flexibility makes the

IED an excellent choice for both new

installations and retrofitting of the existing

stations.

Feature

2

Protection and monitoring IED with

extensive functional library, user

configuration possibility and

expandable hardware design to meet

with user’s special requirements

A complete protection functions library,

include:

Overcurrent protection (50, 51,

67)

Earth fault protection (50N, 51N,

67N)

Neutral earth fault protection (50G,

51G, 67G)

Sensitive earth fault protection

(50Ns, 51Ns, 67Ns)

Negative-sequence overcurrent

protection (46)

Thermal overload protection (49)

Overload protection (50OL)

Overvoltage protection (59)

Undervoltage protection (27)

Displacement voltage protection

(64)

Circuit breaker failure protection

(50BF)

Poles discordance protection

(50PD)

Dead zone protection (50DZ)

STUB protection (50STUB)

Synchro-check and energizing

check (25)

Auto-reclosing function for single-

and/or three-phase reclosing (79)

Voltage transformer secondary

circuit supervision (97FF)

Current transformer secondary

circuit supervision

Self-supervision to all modules in the

IED

Complete information recording:

tripping reports, alarm reports, startup

reports and general operation records.

Any kind of reports can be stored up to

2000 and be memorized in case of

power disconnection

Up to three electric/optical Ethernet

ports can be selected to communicate

with substation automation system by

IEC61850 or IEC60870-5-103

protocols

Up to two electric RS-485 ports can be

selected to communicate with sub-

-station automation system by

IEC60870-5-103 protocol

Time synchronization via network

(SNTP), pulse and IRIG-B mode

Configurable LEDs (Light Emitting

Diodes) and output relays satisfied

users’ requirement

Versatile human-machine interface

Multifunctional software tool for setting,

monitoring, fault recording analysis,

configuration, etc.

Function

3

Protection functions

Description ANSI Code

IEC 61850

Logical Node

Name

IEC 60617

graphical symbol

Current protection

Overcurrent protection 50,51,67 PTOC

3IINV>

3I >>

3I >>>

Earth fault protection 50N, 51N, 67N PTEF

I0INV>

I0>>

I0>>>

Neutral earth fault protection 50G, 51G, 67G

Sensitive earth fault protection 50Ns, 51Ns,

67Ns

3INE>

3INE>>

Negative-sequence overcurrent protection 46

Thermal overload protection 49 PTTR Ith

Overload protection 50OL PTOC 3I >OL

Voltage protection

Overvoltage protection 59 PTOV 3U>

3U>>

Undervoltage protection 27 PTUV 3U<

3U<<

Displacement voltage protection 64 VE>

Breaker control function

Breaker failure protection 50BF RBRF

3I> BF

I0>BF

I2>BF

Dead zone protection 50DZ

3I> DZ

I0>DZ

I2>DZ

STUB protection 50STUB PTOC 3I>STUB

Poles discordance protection 50PD RPLD

3I< PD

I0>PD

I2>PD

Synchro-check and energizing check 25 RSYN

Function

4

Auto-reclosing 79 RREC O→I

Single- and/or three-pole tripping 94-1/3 PTRC

Secondary system supervision

CT secondary circuit supervision

VT secondary circuit supervision 97FF

Monitoring functions

Description

Synchro-check reference voltage supervision

Auxiliary contacts of circuit breaker supervision

Self-supervision

Fault recorder

Station communication

Description

Front communication port

Isolated RS232 port for maintaining

Rear communication port

0-2 isolated electrical RS485 communication ports, support IEC 60870-5-103 protocol

0-3 Ethernet electrical/optical communication ports, support IEC 61850 protocol or IEC 60870-5-103

protocol

Time synchronization port, support GPS pulse or IRIG-B code

IED software tools

Functions

Reading measuring value

Reading IED report

Function

5

Setting

IED testing

Disturbance recording analysis

IED configuration

Printing

Function

6

Application for line

59 3U>

PTOV

27 3U<

PTUV

25

79

50PD PD

RPLD

50 3I >>>

PIOC

50N I0>>>

PIEF

PTOC

51/67 3I>>,3I>

51N/67N I0>>,I0>

PTEF

50BF

RBRF

3I>BF

50STUB 3I>STUB

PTOC

94

PTRC

49 Ith

PTTR

64 UE>

MONITORING

STATION

COMMUNICATION

MEASUREMENT

- RS232/485

- RJ45/FO

- IEC61850

- IEC60870-5-103

46

RSYN

O→I

RREC

50DZ

Fault recording

Function

7

Application for transformer

HV

LV

MV

50

PIOC

Ith

51/67

PIEF

PTEF

51N/67N

50N

PTTR

49

RBRF

3I>BF50BF

50

PIOC PTOC

51/67

50G 51G/67G

PTOC

27

PTUV

59

PTOV

3U<3U>

PTOCPIOC

59 3U>

PTOV

27 3U<

PTUV

94

PTRC

PD PD

RPLD

50STUB 3I>STUB

PTOC

Ith

PTTR

49

RBRF

3I>BF PD PD

RPLD

50BF

94

PTRC

50

PIOC

Ith

51/67

PIOC

PTOC

51N/67N

50N

PTTR

49

RBRF

3I>BF50BF

50G51G/67G

PTOC

PTOC PIOC

59 3U>

PTOV

27 3U<

PTUV

94

PTRC

PD PD

RPLD

46

46

46

PIEF PTEF

51N/67N50N

64 UE>

64 UE>

64 UE>

50DZ

50DZ

50DZ

CSC121 IED-1

CSC121 IED-2

CSC121 IED-3

3I >>>

3I >>>

3I >>>

I0>>>

I0>>>

3I>>,3I>

3I>>,3I>

3I>>,3I> I0>>,I0>

I0>>,I0>

I0>>> I0>>,I0>

Protection

8

Overcurrent protection (50, 51, 67)

The protection provides following features:

Two definite time stages

One inverse time stage

11 kinds of IEC and ANSI inverse time

characteristic curves as well as

optional user defined characteristic

Selectable directional element

characteristic angle to satisfy the

different network conditions and

applications

Each stage can be set individually as

directional/non-directional

Each stage can be set individually for

inrush restraint

Cross blocking function for inrush

detection

Settable maximum inrush current

VT secondary circuit supervision for

directional protection. Once VT failure

happens, the directional stage can be

set to be blocked or to be

non-directional stage

Inrush restraint function

The protection relay may detect large

magnetizing inrush currents during

transformer energizing. In addition to

considerable unbalance fundamental

current, Inrush current comprises large

second harmonic current which does not

appear in short circuit current. Therefore,

the inrush current may affect the protection

functions which operate based on the

fundamental component of the measured

current. Accordingly, inrush restraint logic

is provided to prevent overcurrent

protection from mal- -operation.

Furthermore, by recognition of the inrush

current in one phase, it is possible to set

the protection in a way that not only the

phase with the considerable inrush current,

but also the other phases of the

overcurrent protection are blocked for a

certain time. This is achieved by

cross-blocking feature integrated in the

IED.

The inrush restraint function has a

maximum inrush current setting. Once the

measuring current exceeds the setting, the

overcurrent protection will not be blocked

any longer.

Characteristic of direction element

The direction detection is performed by

determining the position of current vector

in directional characteristic. In other word,

it is done by comparing phase angle

between the fault current and the reference

voltage, Figure 1 illustrates the direction

detection characteristic for phase A

element.

Forward

Reverse

UBC_Ref

ΦPh_Char

IA

IA

0°

90°

Figure 1 Direction detection characteristic of

overcurrent protection directional element

Protection

9

where:

ФPh_Char: The settable characteristic angle

The assignment of the applied measuring

values used in direction determination has

been shown in Table 1 for different types of

faults.

Table 1 Assignment of applied current and

reference voltage for directional element

Phase Current Voltage

A aI bcU

B bI caU

C cI abU

For three-phase short-circuit fault, without

any healthy phase, memory voltage values

are used to determine direction clearly if

the measured voltage values are not

sufficient. The detected direction is based

on the voltage of previously saved cycles.

Earth fault protection (50N, 51N, 67N)

The Earth fault protection can be used to

clear phase to earth faults as system

back-up protection.




11 kinds of the IEC and ANSI inverse

time characteristic curves as well as


Zero sequence directional element

Negative sequence directional element

is applied as a complement to zero

sequence directional element. It can be

enabled/disabled by setting

Each stage can be set individually as


Directional element can be set to be

forward toward the protected object or

reverse toward system for all stages

Settable directional element



applications

Each stage can be set individually for

inrush restraint



directional protection function. Once

VT failure happens, the directional

stage can be set to be blocked or to be

non-directional

Zero-sequence current is calculated by

summation of 3 phase currents or

measured from earth phase CT

selectable

Directional element

The earth fault protection adopts zero

sequence directional element which

compares the zero sequence system

quantities:

3I0, current is calculated from the sum

of the three phase currents or

measured from earth phase CT

3U0, the voltage is used as reference

voltage if it is connected. Otherwise,

3U0, the zero sequence voltage,

calculated from the sum of the three

phase voltages

Protection

10

Forward

Reverse

Φ0_Char

Bisector

Bisector

0_Ref3U

0°

-3I 0

-3I090°


zero sequence directional element

where:

Ф0_Char: The settable characteristic angle

Two operation areas are provided for

direction determination, the forward area

toward the protected object and the

reverse area toward the system, which are

shown in Figure 2.

For earth fault protection, users can

choose negative sequence directional

element as the complement of zero

sequence directional element. It can be

used in case of too low zero sequence

voltage due to some fault condition e.g. the

unfavorable zero-sequence. The negative

sequence directional element

characteristic is shown in Figure 3.

Forward

Reverse

Φ2_Char

I-3 2

I-3 2

3 RefU 2_

0°

90°

Bisector

Bisector


negative sequence directional element

where:

Ф2_Char: The settable characteristic angle

Furthermore, under the VT failure situation,

it can be set to block directional earth fault

protection or to apply non- -directional

earth fault protection.


The protection relay may detect large

magnetizing inrush currents during

transformer energizing. In addition to

considerable unbalanced fundamental

current, inrush current comprises large

secondary harmonic current which doesn’t

appear in short circuit current. Therefore,

the inrush current may affect the protection

functions which operate based on the

fundamental component of the measured

current. Accordingly, inrush restraint logic

is provided to prevent earth fault protection

from maloperation.

Since inrush current cannot be more than a

specified value, the inrush restraint

provides an upper current limit in which

blocking does not occur.

Protection

11

Neutral earth fault protection (50G, 51G, 67G)

The neutral earth fault protection focus on

phase to earth faults. The measuring

current is the one from dedicated neutral

CT.

The following features are provided:



11 kinds of the IEC and ANSI inverse

time characteristic curves as well as


Each stage can be set to be


independently

Zero sequence directional element is

applied. Its characteristic is as same as

earth fault protection illustrated in

Figure 2

Directional element can be set to be

forward towarda the protected object or

reverse toward system for all stage




applications

Inrush restraint function can be set for

each stage separately



directional protection function

Neutral current is measured from

dedicated neutral CT

Inrush restraint feature

The neutral earth fault protection may

detect large magnetizing inrush currents

flowing when transformer is energized.

Directional element

Directional determination of neutral earth

fault elements adopts the zero sequence

directional element as same as the one

applied by earth fault protection. The only

difference is the measured current, which

is measured from the neutral point CT

instead of being calculated from three

phase currents.

Sensitive earth fault protection (50Ns, 51Ns, 67Ns )

The function provides a high sensitive

earth fault protection for cables and high

impedance grounded or isolated systems

where single phase short circuit current is

made by capacitive current. Furthermore,

the function can operate with/without

selective tripping according to fault

direction.

Sensitive earth fault protection integrated

in the IED provides following features:






Sensitive earth fault directional element

with 3U0/3I0-Φ principle

Protection

12

Sensitive earth fault directional element

with CosΦ principle




applications

Each stage can be set to be directional,

or non-directional independently

Each stage can be set individually to

alarm or trip

Displacement voltage can be checked

to increase function reliability

Dedicated sensitive CT


directional protection function

For compensated-earthed system or high

resistance earthed system with outgoing

cable feeders, the directional protection is

provided during a single phase fault.

In general, for high impedance earthed

system, whenever a feeder has a high

capacitive current - normally one greater

than 10% of the current limited by the

neutral earthing impedance – a simple

sensitive earth fault relay is no longer

enough to give sensitive and selective

protection. In this case, the protection

system for the feeder consists of a

directional sensitive earth fault relay whose

threshold can be set to below the

capacitive current.

In order to discriminate forward and

reverse short circuits, the IED provides two

methods for sensitive earth fault direction

detection which should be utilized to cover

all network configurations according to the

type of grounding. The following

characteristic is possible for directional

detection:

Directional sensitive earth fault

detection based on U0/I0-Φ

measurement (see Figure 4)

Forward

Bisector

ΦNS_Char

I- NS

INS

3 RefU0_

0°

90°

Figure 4 Direction detection characteristic of the

sensitive earth fault directional element by

U0/I0-Φ

where:

ФNS_CA: The settable characteristic angle

Based on current vector component

(Cos Φ) measurement (see Figure 5).

In this way, the relay is sensitive to the

active residual current and insensitive

to the capacitive current.

Forward

3 RefU0_

I- S

IS

0°

90°

Protection

13

Figure 5 Direction detection characteristic of the

sensitive earth fault directional element by Cos

Φ

A sensitive current transformer is provided

to detect the small earth fault current (weak

zero sequence current) in isolated

networks or in networks with high

impedance earthing where the earth fault

current is extremely small.

Negative-sequence overcurrent protection (46)

A negative sequence (or phase unbalance)

protection is essentially provided for the

protection of generators, motors and

feeders against unbalanced loading that

may arise due to phase-to-phase faults. In

addition, it is useful in detecting

asymmetrical short circuits with

magnitudes lower than the maximum load

current, especially in delta side of the

transformers.

The protection provide following features:






The first definite stage and inverse

stage can be set individually as alarm

or trip stages

Furthermore, this protection function may

be used to detect interruptions, faults, and

polarity problems with CT.

Thermal overload protection (49)

The insulating material surrounding the

windings ages rapidly if the temperature

exceeds the design limit value. Thus, a

thermal protection function is required to

supplement the existing winding

temperature device. The thermal overload

protection estimates winding temperature

and thus prevents it from thermal

damaging.

The thermal overload protection operates

based on an approximate replica of the

temperature rise in the protected object

caused by overload.

The memorized thermal replica can be

implemented based on thermal models

(Cold or Hot Curve) of IEC60255-8

standard.

The thermal overload in the IED is

provided with one trip stage as well as one

alarm stage. It is possible to set the alarm

stage at a certain percentage of the setting

value applied at the trip stage.

The calculation is performed separately for

each phase, based on fundamental

component and harmonic components.

Overload protection (50OL)

The IED supervises load flow in real time.

If each phase current is greater than the

dedicated setting for a set delay time, the

protection will issue alarm.

Protection

14

Overvoltage protection (59)

The overvoltage protection detects

abnormally network and machine high

voltage conditions. Overvoltage conditions

may occur possibly in the power system

during abnormal conditions such as

no-load, light load, or open line end on long

line. The protection can be used as open

line end detector or as system voltage

supervision normally.



Each stage can be set to alarm or trip

Measuring voltage between phase-

-earth voltage and phase-phase

selectable

Settable dropout ratio

Undervoltage protection (27)

The undervoltage protection provides

protection against dangerous voltage

drops, especially for electric machines.

The protection function provides following

features:



Measuring voltage between phase-

-earth voltage and phase-phase

selectable

Current criteria supervision

Circuit breaker aux. contact

supervision

VT secondary circuit supervision, the

undervoltage function will be blocked

when VT failure happens

Settable dropout ratio

Displacement voltage protection (64)

The displacement voltage protection is

able to monitor the displacement voltage to

detect the earth fault in power system. It is

usually applied in non-solidly earthed

networks where the earth fault current is

limited.

The displacement voltage 3U0 can be

either directly measured from VT or

calculated based on connected three

phases to earth voltages. In the latter case,

the three voltages transformers input must

be connected in an earth-wye

configuration.

The protection provide following features:



3U0 based on calculated summation of

3 phase voltage or measured injected

residual voltage

Breaker failure protection (50BF)

The circuit breaker failure protection is

designed to detect failure of the circuit

breaker during a fault clearance. It ensures

fast back-up tripping of surrounding

breakers by tripping relevant bus sections.

The protection can be single- or

three-phase started to allow use with

single phase tripping applications.

Once a circuit breaker operating failure

Protection

15

occurs on a feeder/transformer, the bus

section which the feeder/transformer is

connected with can be selectively isolated

by the protection. In addition a transfer trip

signal is issued to trip the remote end

circuit breaker of the feeder.

The current criteria are in combination with

three phase current, zero and negative

sequence current to achieve a higher

security.

The function can be set to give single- or

three phase re-tripping of the local breaker

to avoid unnecessary tripping of

surrounding breakers in the case of two

available trip coils.

Additionally, during single pole tripping,

stage 1 is able to re-trip three phase with

settable delay time after single phase

re-tripping failure.

Two trip stages (local and surrounding

breaker tripping)

Transfer trip command to the remote

line end in second stage

Internal/ external initiation

Single/three phase CBF initiation

Selectable CB Aux contacts checking

Current criteria checking (including

phase current, zero and negative

sequence current)

Dead zone protection (50DZ)

The IED provides dead zone protection to

protect the area, between circuit breaker

and CT in the case that CB is open.

Therefore, by occurrence of a fault in dead

zone, the short circuit current is measured

by protection relay while CB auxiliary

contacts indicate the CB is open.

Internal/ external initiation

Self-adaptive for bus side CT or line

side CT

When one bus side CT of feeder or

transformer is applied, once a fault occurs

in the dead zone, the IED trips the relevant

busbar zone. Tripping logic is illustrated in

Figure 6.

Bus

IFAULT

Trip

Line1 Line2 LineN

Opened CB Closed CB

Figure 6 Tripping logic applying bus side CT

When one line side CT is applied and a

fault occurs in the dead zone, protection

relay sends a transfer trip to remote end

relay to isolate the fault. Tripping logic is

illustrated in Figure 7.

Protection

16

Bus

IFAULT

Relay

Inter trip

Line1 Line2 LineN

Trip

Opened CB Closed CB

Figure 7 Tripping logic applying line side CT

When one transformer side CT is applied

and a fault occurs in the dead zone,

protection relay trip the circuit breakers of

the others transformer winding. Tripping

logic is illustrated in

Figure 8.

Bus2

IFAULT

trip

T1

L1Ln

Bus1

Bus3

Opened CB Closed CB

Figure 8 Tripping logic applying transformer side

CT

STUB protection (50STUB)

The VT is mostly installed at line side of

transmission lines. Therefore, for the case

that transmission line is taken out of

service and the line disconnector is

opened, the distance protection will not be

able to operate and must be blocked.

The STUB protection protects the zone

between the CTs and the open

disconnector. The STUB protection is

enabled when the open position of the

disconnector is connected to IED binary

input. The function supports one definite

stage which related concept is shown in

Figure 9.

Bus A

IFAULT

Delay trip

Line

A

Line

B

IFAULT

Bus B

Closed CB

Legend:

Figure 9 Tripping logic of STUB protection

Protection

17

Poles discordance protection (50PD)

The phase segregated operating circuit

breakers can be in different positions

(close-open) due to electrical or

mechanical failures during the system

normal operation.

The protection operates based on

information from auxiliary contacts of the

circuit breaker with additional criteria.

The protection performs following

functions:

3 phase CB Aux contacts supervision

Current criteria checking (including

phase current, zero and negative

sequence current)

Synchro-check and energizing check (25)

The synchro-check function checks voltages of the circuit breaker sides for synchronism conditions.

The synchronization function ensures the

stability of the network in three phase

reclosing condition. To do this, the two side

voltages of the circuit breaker are

compared in terms of magnitude, phase

angle and frequency differences.

Additionally, closing can be done safely in

conditions that at least one side of the CB

has dead voltage.

Available for automatic reclosing

(internally or externally)

Based on voltage/ angle/ frequency

difference

Synchro-check conditions:

Synch-check

Energizing check, and synch-check if

energizing check failure

Override

Modes of energizing check:

Dead V4 and dead V3Ph

Dead V4 and live V3Ph

Live V4 and dead V3Ph


If the automatic reclosing is set for

synchronization check or energizing check,

during the automatic reclosing period, the

synchronization condition of the voltages

between both sides of CB cannot be met,

an alarm will be issued after default time

delay.

Auto-reclosing (79)

For restoration of the normal service after a

fault an auto reclosing attempt is mostly

made for overhead lines. Experiences

show that about 85% of faults have

transient nature and will disappear after an

auto reclosing attempt is performed. This

means that the line can be re-energized in

a short period. The reconnection is

accomplished after a dead time via the

automatic reclosing function. If the fault is

permanent or short circuit arc has not been

disappeared, the protection will re-trip the

breaker. Main features of the

Auto-reclosing are as follows:

Up to 4 shots (selectable)

Individually settable dead time for three

phase and single phase fault and for

each shot

Protection

18

External AR initiation

Single/three phase AR operation

CB ready supervision

CB Aux. contact supervision

Cooperation with internal synch-check

function for reclosing command

Secondary system supervision

Current transformer secondary circuit supervision

Open or short circuited CT cores can

cause unwanted operation of some

protection functions such as earth fault

current and negative sequence current

functions.

Interruption of the CT secondary circuit is

detected based on zero-sequence current.

Once CT failure happens, each stage of

earth fault protection is blocked.

Voltage transformer secondary circuit supervision

A measured voltage failure resulting from a

broken conductor or a short circuit fault in

the secondary circuit of voltage

transformer may result in unwanted

operation of the protection functions which

work based on voltage criteria. VT failure

supervision function is provided to block

these protection functions and enable the

backup protection functions. The features

of the function are as follows:

Symmetrical/asymmetrical VT failure

detection

3-phase AC voltage MCB monitoring

1-phase AC voltage MCB monitoring

Zero and negative sequence current

monitoring

Applicable in solid grounded,

compensated or isolated networks

Monitoring

19


If the automatic reclosing is set for

synchronization check or energizing check,

during the automatic reclosing period, the

synchronization condition of the voltages

between both sides of CB cannot be met,

an alarm will be issued after default time

delay.

Self-supervision

All modules can perform

self-supervision to its key hardware

components and program, as soon as

energizing. Parts of the modules are

self-supervised in real time. All internal

faults or abnormal conditions will

initiate an alarm. The fatal faults among

them will result in the whole IED

blocked

CPU module and communication

module perform real time

inter-supervision. Therefore

communication interruption between

them is detected and related alarm will

be given

CRC checks for the setting, program

and configuration, etc.

Communication

20

Station communication

Overview

The IED is able to connect to one or

more substation level systems or

equipments simultaneously, through the

communication ports with

communication protocols supported.

(Shown in Figure 10)


There is a serial RS232 port on the front

plate of all the IEDs. Through this port,

the IED can be connected to the

personal computer for setting, testing,

and configuration using the dedicated

Sifang software tool.

RS485 communication ports

Up to 2 isolated electrical RS485

communication ports are provided to

connect with substation automation

system. These two ports can work in

parallel for IEC60870-5-103.

Ethernet communication ports

Up to 3 electrical or optical Ethernet

communication ports are provided to

connect with substation automation system.

These two out of three ports can work in

parallel for protocol, IEC61850 or

IEC60870-5-103.

Communication protocol

The IED supports station communication

with IEC 61850-8 and IED60870-5-103

protocols.

By means of IEC61850, GOOSE peer- to

peer communication make it possible that

bay IEDs can exchange information to

each other directly. And a simple

master-less system can be set up for bay

and system interlocking and other

interactive function.

Gateway

or

converter

Work Station 3

Server or

Work Station 1

Server or

Work Station 2

Work Station 4

Net 2: IEC61850/IEC103,Ethernet Port B

Net 3: IEC103, RS485 Port A

Net 4: IEC103, RS485 Port B

Net 1: IEC61850/IEC103,Ethernet Port A

Gateway

or

converter

SwitchSwitch Switch

Switch

Switch

Switch

Figure 10 Connection example for multi-networks of station automation system

Note: All four ports can work in parallel

Communication

21

Time synchronization port

All IEDs feature a permanently integrated

electrical time synchronization port. It can

be used to feed timing telegrams in IRIG-B

or pulse format into the IEDs via time

synchronization receivers. The IED can

adapt the second or minute pulse in the

pulse mode automatically.

Meanwhile, SNTP network time

synchronization can be applied.

The Figure 11 illustrates the optional time

synchronization modes.

SNTP IRIG-B Pulse

Ethernet port IRIG-B port Binary input

Figure 11 Time synchronizing modes

Software tool

22

A user-friendly software tool is offered for

engineering, setting, disturbance analysis

and monitoring. It provides versatile

functionalities required throughout the life

cycle of protection IEDs. Its features are as

follows:

Device administration in projects with

freely configurable hierarchies for any

substation and electrical power station

topology

Modification, import and export of

parameter sets sorted by protection

functions, with setting logicality check

Precise fault analysis with visualization

of fault records in curves, circle

diagrams, vector diagrams, bar charts

and data sheet.

Intelligent plausibility checks rule out

incorrect input

Graphical visualization of charac-

-teristics and zone diagrams with direct

manipulation of the curves

Password-protected access for

different jobs such as parameter setting,

commissioning and controlling

(authorized staff only)

Testing and diagnostic functions

–decisive support in the commissioning

phase

Hardware

23

Front plate

The whole front plate is divided into

zones, each of which has a well-defined

functionality:

2

1

3

45

68 7

CSC-161

Figure 12 IED front plate

1 Liquid crystal display (LCD)

2 LEDs

3 Shortcut function keys

4 Arrow keys

5 Reset key

6 Quit key

7 Set key

8 RS232 communication port

Rear plate

Test port

X 3

COM

X2X4X5X6X7X8 X1

AIM

X10

PSM

Ethernet ports

X 9

For BIM and BOM

CPU

Figure 13 Rear plate of the protection IED

Hardware

24

Modules

Analogue Input Module (AIM)

The analogue input module is used to

galvanically separate and transform the

secondary currents and voltages

generated by the measuring transformers.

CPU Module (CPU)

The CPU module handles all protection

functions and logic.

The redundant A/D sampling channels are

equipped. By comparing the data from

redundant sampling channels, any

sampling data errors and the channel

hardware faults can be detected

immediately and the proper alarm and

blocking is initiated in time.

Communication Module (COM)

The communication module performs

communication between the internal

protection system and external equipments

such as HMI, engineering workstation,

substation automation system, RTU, etc.,

to transmit remote metering, remote

signaling, SOE, event reports and record

data.

Up to 3 channels isolated electrical or

optical Ethernet ports and up to 2 channels

RS485 serial communication ports can be

provided in communication module to meet

the communication demands of different

substation automation system and RTU at

the same time.

The time synchronization port is equipped,

which can work in pulse mode or IRIG-B

mode. SNTP mode can be applied through

communication port.

In addition, a series printer port is also

reserved.

Binary Input Module (BIM)

The binary input module is used to connect

the input signals and alarm signals such as

the auxiliary contacts of the circuit breaker

(CB), etc.

Binary Output Module (BOM)

The binary output modules mainly provide

tripping output contacts, initiating output

contacts and signaling output contacts. All

the tripping output relays have contacts

with a high switching capacity and are

blocked by protection startup elements.

Each output relay can be configured to

satisfy the demands of users.

Power Supply Module (PSM)

The power supply module is used to

provide the correct internal voltages and

full isolation between the terminal and the

battery system.

Hardware

25

Dimension

B

A

C

D

E

Figure 14 4U, 19” case with rear cover

Table 2 Dimension of the IED case

Legend A B C D E

Dimension (mm) 177 482.6 265 320 437.2

A

B

C D

E

Figure 15 Cut-out on the panel

Table 3 Dimension of the cutout for IED mounting

Legend A B C D E

Dimension (mm) 450 465 161.6 178 6.5

Connection

26

A. Typical rear terminals diagram

X1

CSC-121a01

IAb01

a02IB

b02

a03IC

b03

a04I0

b04

a05I4

b05

a10U4

b10

a09

UB

b09

UC

UA

a11

b11

a12

b12 UN

Null

Null

X4a02

BI02 c02

BI03 a04

BI04 c04

BI05 a06

BI06 c06

BI07 a08

BI08 c08

BI09 a10

BI01

BI10 c10

BI11 a12

BI12 c12

BI13 a14

BI14 c14

BI15 a16

BI16 c16

BI17 a18

BI18 c18

BI19 a20

BI20 c20

BI21 a22

BI22 c22

BI23 a24

BI24 c24

BI25 a26

BI26 c26

BI27 a28

BI28 c28

BI29 a30

BI30 c30

a32

c32BI-COM1(-)

BI-COM2(-)

X31

2

3

4

5

6

7

89

10

11

12

13

14

15

16

Ethernet Port 1 - RJ45

Ethernet Port 2 - RJ45

Null

Null

Null

RS485 - 2B

RS485 - 2A

RS485 - 1B

RS485 - 1AGPS

Null

GPS - GND

Null

Null

Null

Null

Null

Null

X5a02

c02

a04

c04

a06

c06

a08

c08a10

c10

a12

c12

a14

c14

a16

c16

a18c18

a20

c20

a22

c22

a24

c24a26

c26

a28

c28

a30

c30

a32

c32

1)

Ethernet Port 1 - ST

Ethernet Port 2 - ST

Note:

1) Alternative Ethernet ports for

station communication are 2 ST

optical fiber ports, shown as

following,

a06

b06

a07

b07

a08

b08

Null

Null

Null

Null

Null

Null

Output relay 01

Output relay 02

Output relay 03

Output relay 04

Output relay 05

Output relay 06

Output relay 07

Output relay 08

Output relay 09

Output relay 10

Output relay 11

Output relay 12

Output relay 13

Output relay 14

Output relay 15

Output relay 16

Connection

27

CSC-121

X9a02

c02

a04

c04

a06

c06

a08

c08a10

c10

a12

c12

a14

c14

a16

c16

a18c18

a20

c20

a22

c22

a24

c24a26

c26

a28

c28

a30

c30

a32

c32

X8a02

c02

a04

c04

a06

c06

a08

c08a10

c10

a12

c12

a14

c14

a16

c16

a18c18

a20

c20

a22

c22

a24

c24a26

c26

a28

c28

a30

c30

a32

c32

Output relay 01

Output relay 02

Output relay 03

Output relay 04

Output relay 05

Output relay 06

Output relay 07

Output relay 08

Output relay 09

Output relay 10

Output relay 11

Output relay 12

Output relay 13

Output relay 14

Output relay 15

Output relay 16

X6a02

c02

a04

c04

a06

c06

a08

c08a10

c10

a12

c12

a14

c14

a16

c16

a18c18

a20

c20

a22

c22

a24

c24a26

c26

a28

c28

a30

c30

a32

c32

Output relay 01

Output relay 02

Output relay 03

Output relay 04

Output relay 05

Output relay 06

Output relay 07

X7a02

c02

a04

c04

a06

c06

a08

c08a10

c10

a12

c12

a14

c14a16

c16

a18c18

a20

c20

a22

c22

a24

c24a26

c26

a28

c28

a30

c30

a32

c32

Output relay 01

Output relay 02

Output relay 03

Output relay 04

Output relay 05

Output relay 06

Output relay 07

Output relay 08

Output relay 09

Output relay 10

Output relay 11

Output relay 12

Output relay 13

Output relay 14

Output relay 15

Output relay 16

1)

Note :

1) X9 is optional terminal

set, for additional binary

output module ordered by

user.

Output relay 08

Output relay 09

Output relay 10

Output relay 11

Output relay 12

Output relay 13

Output relay 14

Output relay 15

Output relay 16

Connection

28

CSC-121X10a02

c02

a04

c04

a06

c06

a08

c08a10

c10

a12

c12

a14

c14

a16

c16

a18c18

a20

c20

a22

c22

a24

c24a26

c26

a28

c28

a30

c30

a32

c32

DC 24V + output

Null

DC 24V - output

Power failure alarm relay 1

AUX DC + input

Power failure alarm relay 2

AUX DC - input

Null

Null

Null

Terminal for earthing

Terminal for earthing

Null

Null

Null

Null

Connection

29

B. Typical analogue inputs connection for line

IA

IB

IC

UB

UA

UC

U4

IN

UN

Protection IED

A

B

C

* * *

a01

a02

a03

a04

b01

b02

b03

b04

a12

a11

b11

b12

a10

b10

Connection

30

C. Typical analogue inputs connection for transformer

* * *

A

BC

A

B

C

*

A B C

b05

a05

I

IA

IB

IC

UB

UA

UC

IN

UN

Protection IED

a01

a02

a03

a04

b01

b02

b03

b04

a12

a11

b11

b12

5

Connection

31

D. Typical analogue inputs connection for sensitive earth fault protection

A

B

C

* * *

b05

a05

*

I

IA

IB

IC

UB

UA

UC

IN

UN

Protection IED

a01

a02

a03

a04

b01

b02

b03

b04

a12

a11

b11

b12

5

Technical data

32

Frequency

Item Standard Data

Rated system frequency IEC 60255-1 50 Hz or 60Hz

Internal current transformer

Item Standard Data

Rated current Ir IEC 60255-1 1 or 5 A

Nominal current range 0.05 Ir to 30 Ir

Nominal current range of sensitive

CT

0.005 to 1 A

Power consumption (per phase) ≤ 0.1 VA at Ir = 1 A;

≤ 0.5 VA at Ir = 5 A

≤ 0.5 VA for sensitive CT

Thermal overload capability IEC 60255-1

IEC 60255-27

100 Ir for 1 s

4 Ir continuous

Internal voltage transformer

Item Standard Data

Rated voltage Vr (ph-ph) IEC 60255-1 100 V /110 V

Nominal range (ph-e) 0.4 V to 120 V

Power consumption at Vr = 110 V IEC 60255-27

DL/T 478-2001

≤ 0.1 VA per phase

Thermal overload capability

(phase-neutral voltage)

IEC 60255-27

DL/T 478-2001

2 Vr, for 10s

1.5 Vr, continuous

Auxiliary voltage

Item Standard Data

Rated auxiliary voltage Uaux IEC60255-1 110 to 250V DC

Permissible tolerance IEC60255-1 ±%20 Uaux

Power consumption at quiescent

state

IEC60255-1 ≤ 50 W per power supply module

Power consumption at maximum

load

IEC60255-1 ≤ 60 W per power supply module

Technical data

33

Inrush Current IEC60255-1 T ≤ 10 ms/I≤ 25 A per power supply

module,

Binary inputs

Item Standard Data

Input voltage range IEC60255-1 110/125 V DC

220/250 V DC

Threshold1: guarantee

operation

IEC60255-1 154V, for 220/250V DC

77V, for 110V/125V DC

Threshold2: uncertain operation IEC60255-1 132V, for 220/250V DC;

66V, for 110V/125V DC

Response time/reset time IEC60255-1 Software provides de-bounce

time

Power consumption, energized IEC60255-1 Max. 0.5 W/input, 110V DC

Max. 1 W/input, 220V DC

Binary outputs

Item Standard Data

Max. system voltage IEC60255-1 250V DC/AC

Current carrying capacity IEC60255-1 5 A continuous,

30A，200ms ON, 15s OFF

Making capacity IEC60255-1 1100 W(DC) at inductive load with

L/R>40 ms

1000 VA(AC)

Breaking capacity IEC60255-1 220VDC, 0.15A, at L/R≤40 ms

110VDC, 0.30A, at L/R≤40 ms

Mechanical endurance, Unloaded IEC60255-1 50,000,000 cycles (3 Hz switching

frequency)

Mechanical endurance, making IEC60255-1 ≥1000 cycles

Mechanical endurance, breaking IEC60255-1 ≥1000 cycles

Specification state verification IEC60255-1

IEC60255-23

IEC61810-1

UL/CSA、TŰV

Technical data

34

Contact circuit resistance

measurement

IEC60255-1

IEC60255-23

IEC61810-1

30mΩ

Open Contact insulation test (AC

Dielectric strength)

IEC60255-1

IEC60255-27

AC1000V 1min

Maximum temperature of parts and

materials

IEC60255-1 55℃


Item Data

Number 1

Connection Isolated, RS232; front panel,

9-pin subminiature connector, for software tools

Communication speed 9600 baud

Max. length of communication cable 15 m

RS485 communication port

Item Data

Number 0 to 2

Connection 2-wire connector

Rear port in communication module

Max. length of communication cable 1.0 km

Test voltage 500 V AC against earth

For IEC 60870-5-103 protocol

Communication speed Factory setting 9600 baud,

Min. 1200 baud, Max. 19200 baud

Ethernet communication port

Item Data

Electrical communication port

Number 0 to 3

Connection RJ45 connector


Max. length of communication cable 100m

For IEC 61850 protocol

Technical data

35

Communication speed 100 Mbit/s

For IEC 60870-5-103 protocol


Optical communication port ( optional )

Number 0 to 2

Connection SC connector


Optical cable type Multi-mode

Max. length of communication cable 2.0km

IEC 61850 protocol


IEC 60870-5-103 protocol


Time synchronization

Item Data

Mode Pulse mode

IRIG-B signal format IRIG-B000

Connection 2-wire connector


Voltage levels differential input

Environmental influence

Item Data

Recommended permanent operating temperature -10 °C to +55°C

(Legibility of display may be impaired above

+55 °C /+131 °F)

Storage and transport temperature limit -25°C to +70°C

Permissible humidity 95 % of relative humidity

IED design

Item Data

Case size 4U×19inch

Weight ≤ 10kg

Technical data

36

Product safety-related Tests

Item Standard Data

Over voltage category IEC60255-27 Category III

Pollution degree IEC60255-27 Degree 2

Insulation IEC60255-27 Basic insulation

Degree of protection (IP) IEC60255-27

IEC 60529

Front plate: IP40

Rear, side, top and bottom: IP 30

Power frequency high voltage

withstand test

IEC 60255-5

EN 60255-5

ANSI C37.90

GB/T 15145-2001

DL/T 478-2001

2KV, 50Hz

2.8kV DC

between the following circuits:

auxiliary power supply

CT / VT inputs

binary inputs

binary outputs

case earth

500V, 50Hz

between the following circuits:

Communication ports to case

earth

time synchronization terminals

to case earth

Impulse voltage test IEC60255-5

IEC 60255-27

EN 60255-5

ANSI C37.90

GB/T 15145-2001

DL/T 478-2001

5kV (1.2/50μs, 0.5J)

If Ui≥63V

1kV if Ui<63V

Tested between the following

circuits:


CT / VT inputs

binary inputs

binary outputs

case earth

Note: Ui: Rated voltage

Insulation resistance IEC60255-5

IEC 60255-27

EN 60255-5

ANSI C37.90

GB/T 15145-2001

≥ 100 MΩ at 500 VDC

Technical data

37

DL/T 478-2001

Protective bonding resistance IEC60255-27 ≤ 0.1Ω

Fire withstand/flammability IEC60255-27 Class V2

Electromagnetic immunity tests

Item Standard Data

1 MHz burst immunity test IEC60255-22-1

IEC60255-26

IEC61000-4-18

EN 60255-22-1

ANSI/IEEE C37.90.1

Class III

2.5 kV CM ; 1 kV DM

Tested on the following circuits:


CT / VT inputs

binary inputs

binary outputs

1 kV CM ; 0 kV DM


communication ports

Electrostatic discharge IEC 60255-22-2

IEC 61000-4-2

EN 60255-22-2

Level 4

8 kV contact discharge;

15 kV air gap discharge;

both polarities; 150 pF; Ri = 330 Ω

Radiated electromagnetic field

disturbance test

IEC 60255-22-3

EN 60255-22-3

Frequency sweep:

80 MHz – 1 GHz; 1.4 GHz – 2.7 GHz

spot frequencies:

80 MHz; 160 MHz; 380 MHz; 450

MHz; 900 MHz; 1850 MHz; 2150

MHz

10 V/m

AM, 80%, 1 kHz

Radiated electromagnetic field

disturbance test

IEC 60255-22-3

EN 60255-22-3

Pulse-modulated

10 V/m, 900 MHz; repetition rate

200 Hz, on duration 50 %

Electric fast transient/burst immunity

test

IEC 60255-22-4,

IEC 61000-4-4

EN 60255-22-4

ANSI/IEEE C37.90.1

Class A, 4KV



CT / VT inputs

binary inputs

binary outputs

Technical data

38

Class A, 1KV


communication ports

Surge immunity test IEC 60255-22-5

IEC 61000-4-5

4.0kV L-E

2.0kV L-L



CT / VT inputs

binary inputs

binary outputs

500V L-E


communication ports

Conduct immunity test IEC 60255-22-6

IEC 61000-4-6

Frequency sweep: 150 kHz – 80

MHz

spot frequencies: 27 MHz and 68

MHz

10 V

AM, 80%, 1 kHz

Power frequency immunity test IEC60255-22-7 Class A

300 V CM

150 V DM

Power frequency magnetic field test IEC 61000-4-8 Level 4

30 A/m cont. / 300 A/m 1 s to 3 s

100 kHz burst immunity test IEC61000-4-18 2.5 kV CM ; 1 kV DM



CT / VT inputs

binary inputs

binary outputs

1 kV CM ; 0 kV DM


communication ports

DC voltage interruption test

Item Standard Data

DC voltage dips IEC 60255-11 100% reduction 20 ms

Technical data

39

60% reduction 200 ms

30% reduction 500 ms

DC voltage interruptions IEC 60255-11 100% reduction 5 s

DC voltage ripple IEC 60255-11 15%, twice rated frequency

DC voltage gradual shut–down

/start-up

IEC 60255-11 60 s shut down ramp

5 min power off

60 s start-up ramp

DC voltage reverse polarity IEC 60255-11 1 min

Electromagnetic emission test

Item Standard Data

Radiated emission IEC60255-25

EN60255-25

CISPR22

30MHz to 1GHz ( IT device may up

to 5 GHz)

Conducted emission IEC60255-25

EN60255-25

CISPR22

0.15MHz to 30MHz

Mechanical tests

Item Standard Data

Sinusoidal Vibration response

test

IEC60255-21-1

EN 60255-21-1

Class 1

10 Hz to 60 Hz: 0.075 mm

60 Hz to 150 Hz: 1 g

1 sweep cycle in each axis

Relay energized

Sinusoidal Vibration endurance

test

IEC60255-21-1

EN 60255-21-1

Class 1

10 Hz to 150 Hz: 1 g

20 sweep cycle in each axis

Relay non-energized

Shock response test IEC60255-21-2

EN 60255-21-2

Class 1

5 g, 11 ms duration

3 shocks in both directions of 3 axes

Relay energized

Shock withstand test IEC60255-21-2

EN 60255-21-2

Class 1

15 g, 11 ms duration

3 shocks in both directions of 3 axes

Technical data

40

Relay non-energized

Bump test IEC60255-21-2 Class 1

10 g, 16 ms duration

1000 shocks in both directions of 3

axes

Relay non-energized

Seismic test IEC60255-21-3 Class 1

X-axis 1 Hz to 8/9 Hz: 7.5 mm

X-axis 8/9 Hz to 35 Hz :2 g

Y-axis 1 Hz to 8/9 Hz: 3.75 mm

Y-axis 8/9 Hz to 35 Hz :1 g

1 sweep cycle in each axis,

Relay energized

Climatic tests

Item Standard Data

Cold test - Operation IEC60255-27

IEC60068-2-1

-10°C, 16 hours, rated load

Cold test – Storage IEC60255-27 IEC60068-2-1 -25°C, 16 hours

Dry heat test – Operation [IEC60255-27

IEC60068-2-2

+55°C, 16 hours, rated load

Dry heat test – Storage IEC60255-27

IEC60068-2-2

+70°C, 16 hours

Change of temperature IEC60255-27

IEC60068-2-14

Test Nb, figure 2, 5 cycles

-10°C / +55°C

Damp heat static test IEC60255-27

IEC60068-2-78

+40°C, 93% r.h. 10 days, rated load

Damp heat cyclic test IEC60255-27

IEC60068-2-30

+55°C, 93% r.h. 6 cycles, rated load

CE Certificate

Item Data

EMC Directive EN 61000-6-2 and EN61000-6-4 (EMC Council

Directive 2004/108/EC)

Low voltage directive EN 60255-27 (Low-voltage directive 2006/95 EC).

Technical data

41

Functions

NOTE: Ir: CT rated secondary current, 1A or 5A;

Overcurrent protection (ANSI 50, 51, 67)

Item Rang or Value Tolerance

Definite time characteristics

Current 0.08 Ir to 20.00 Ir ≤ ±3% setting or ±0.02Ir

Time delay 0.00 to 60.00s, step 0.01s ≤ ±1% setting or +40ms, at 200% operating setting

Reset time approx. 40ms

Reset ratio Approx. 0.95 at I/In ≥ 0.5

Inverse time characteristics


IEC standard Normal inverse;

Very inverse;

Extremely inverse;

Long inverse

≤ ±5% setting + 40ms, at 2

<I/ISETTING < 20, in accordance

with IEC60255-151

ANSI Inverse;

Short inverse;

Long inverse;

Moderately inverse;

Very inverse;

Extremely inverse;

Definite inverse


<I/ISETTING < 20, in

accordance with ANSI/IEEE

C37.112,

user-defined characteristic T=



with IEC60255-151

Time factor of inverse time, A 0.005 to 200.0s, step 0.001s

Delay of inverse time, B 0.000 to 60.00s, step 0.01s

Index of inverse time, P 0.005 to 10.00, step 0.005

set time Multiplier for step n: k 0.05 to 999.0, step 0.01

Minimum operating time 20ms

Maximum operating time 100s

Reset mode instantaneous

Reset time approx. 40ms,

Directional element

Operating area range ≤ ±3°, at phase to phase

Technical data

42

Characteristic angle 0° to 90°, step 1° voltage >1V

Earth fault protection (ANSI 50N, 51N, 67N)

Item Rang or value Tolerance

Definite time characteristic




Reset ratio Approx. 0.95 at I/Ir ≥ 0.5




Very inverse;

Extremely inverse;

Long inverse

IEC60255-151


<I/ISETTING < 20

ANSI Inverse;

Short inverse;

Long inverse;

Moderately inverse;

Very inverse;

Extremely inverse;

Definite inverse

ANSI/IEEE C37.112,


<I/ISETTING < 20


IEC60255-151


<I/ISETTING < 20

Time factor of inverse time, A 0.005 to 200.0s, step

0.001s








Directional element

Operating area range of zero


≤ ±3°, at 3U0≥1V

Characteristic angle 0° to 90°, step 1°

Technical data

43

Operating area range of negative


≤ ±3°, at 3U2≥2V


Neutral earth fault protection (50G, 51G, 67G)

Item Rang or value Tolerance





Reset ratio Approx. 0.95 at I/Ir ≥ 0.5




Very inverse;

Extremely inverse;

Long inverse


<I/ISETTING < 20, in accordance with

IEC60255-151

ANSI Inverse;

Short inverse;

Long inverse;

Moderately inverse;

Very inverse;

Extremely inverse;

Definite inverse



with ANSI/IEEE C37.112,



<I/ISETTING < 20, in accordance with

IEC60255-151

Time factor of inverse time, A 0.005 to 200.0s, step

0.001s








Directional element

Operating area range ≤ ±3°, at 3U0≥1V

Technical data

44


Operating area range ≤ ±3°, at 3U2≥2V


Sensitive/neutral earth fault protection (ANSI 50Ns, 51Ns, 67Ns)

Item Range or value Tolerance


Current from sensitive CT input 0.005 to 1.000 A , step 0.001 A ≤ ±3 % setting value or 1 mA

Current from neutral CT input 0.08 Ir to 20.00 Ir ≤ ±3 % setting value or 0.02 Ir

Time delay 0.00 to 60.00, step 0.01 s ≤ ±1.5 % setting value or +40

ms, at 200% operating setting

Reset ratio Approx. 0.95 when I/In ≥ 0.5

Reset time Approx. 40 ms


Current from sensitive input 0.005 to 1.000 A , step 0.001 A ≤ ±3 % setting value or 1 mA

Current from normal input 0.08 Ir to 20.00 Ir ≤ ±3 % setting value or 0.02 Ir


Very inverse;

Extremely inverse;

Long inverse



with IEC60255-151

ANSI Inverse;

Short inverse;

Long inverse;

Moderately inverse;

Very inverse;

Extremely inverse;

Definite inverse




C37.112,

user-defined characteristic

T=



with IEC60255-151









Directional element for sensitive earth-fault protection

Technical data

45

principles I cos Φ

Φ (V0 / I0)”

Direction measurement IE and VE measured

or 3V0 calculated

3U0 Minimum voltage threshold 2.00 to 100.00 V, step 0.01 V ≤ ±3 % setting for measured

voltage;

≤ ±5 % setting for calculated

voltage

Characteristic angle Φ_SEFChar 0.0° to 90.0°, step 1° ≤ ±3°

Operating area range ≤ ±3°

Negative sequence overcurrent protection (ANSI 46)



Current 0.08 Ir to 20.00 Ir ≤ ±3% setting value or ±0.02Ir

Time delay 0.00 to 60.00, step 0.01 s ≤ ±1% setting or +40ms, at 200% operating setting

Reset time ≤ 40 ms

Reset ratio Approx. 0.95 for I2 /Ir > 0.5




Very inverse;

Extremely inverse;

Long inverse



with IEC60255-151

ANSI Inverse;

Short inverse;

Long inverse;

Moderately inverse;

Very inverse;

Extremely inverse;

Definite inverse




C37.112,




with IEC60255-151





Technical data

46





Item Range or value Tolerance

Upper function limit

Max current for inrush restraint

0.25 Ir to 20.00 Ir ≤ ±3% setting value or ±0.02Ir

Ratio of 2nd

harmonic current to

fundamental component current

0.10 to 0.45, step 0.01

Cross-block (IL1, IL2, IL3)

(settable time)

0.00s to 60.00 s, step 0.01s ≤ ±1% setting or +40ms

Thermal overload protection (ANSI-49)



Thermal heating time constant 1 to 9999 s

Thermal cooling time constant 1 to 9999 s

IEC cold curve

22

2

ln

II

It

eq

eq

IEC 60255–8,

≤ ±5% setting or +40ms

IEC hot curve

22

22

ln

II

IIt

eq

Peq

IEC 60255–8,

≤ ±5% setting or +40ms

Breaker failure protection (ANSI 50 BF)


phase current

Negative sequence current

zero sequence current

0.08 Ir to 20.00 Ir ≤ ±3% setting or ±0.02Ir

Time delay of stage 1 0.00s to 32.00 s, step 0.01s ≤ ±1% setting or +25 ms, at

200% operating setting Time delay of stage 2 0.00s to 32.00 s, step 0.01s

Reset time of stage 1 < 20ms

Technical data

47

Dead zone protection (ANSI 50DZ)



Time delay 0.00s to 32.00s, step 0.01s ≤ ±1% setting or +40 ms, at

200% operating setting

Pole discordance protection (ANSI 50PD)





STUB protection (ANSI 50STUB)





Undervoltage protection (ANSI 27)


Voltage connection Phase-to-phase voltages or

phase-to-earth voltages

≤ ±3 % setting or ±1 V

Phase to earth voltage 5 to 75 V , step 1 V ≤ ±3 % setting or ±1 V

Phase to phase voltage 10 to 150 V, step 1 V ≤ ±3 % setting or ±1 V

Reset ratio 1.01 to 2.00, step 0.01 ≤ ±3 % setting

Time delay 0.00 to 120.00 s, step 0.01 s ≤ ±1 % setting or +50 ms, at 80%

operating setting

Current criteria 0.08 to 2.00 Ir ≤ ±3% setting or ±0.02Ir

Reset time ≤ 50 ms

Overvoltage protection (ANSI 59)


Voltage connection Phase-to-phase voltages or ≤ ±3 % setting or ±1 V

Technical data

48

phase-to-earth voltages

Phase to earth voltage 40 to 100 V, step 1 V ≤ ±3 % setting or ±1 V

Phase to phase voltage 80 to 200 V, step 1 V ≤ ±3 % setting or ±1 V

Reset ratio 0.90 to 0.99, step 0.01 ≤ ±3 % setting

Time delay 0.00 to 60.00 s, step 0.01s ≤ ±1 % setting or +50 ms, at


Reset time <40ms

Voltage displacement protection (ANSI 64)


Pickup threshold 3V0

(calculated)

2 to 100 V, step 1 V ≤ ± 5 % setting value or ±1 V

Time delay 0.00 to 60.00 s, step 0.01s ≤ ±1 % setting or +50 ms, at


Reset ratio Approx. 0.95

Synchro-check and voltage check (ANSI 25)


Operating mode Synchronization check:

Synch-check

Energizing check, and synch-check if energizing check failure

Override

Energizing check:

Dead V4 and dead V3Ph

Dead V4 and live V3Ph

Live V4 and dead V3Ph

Voltage threshold of dead line or

bus

10 to 50 V (phase to earth), step

1 V

≤ ± 3 % setting or 1 V

Voltage threshold of live line or

bus

30 to 65 V (phase to earth), step

1 V

≤ ± 3 % setting or 1 V

∆V-measurement Voltage

difference

1 to 40 V (phase-to-earth), steps

1 V

≤ ± 1V

Δf-measurement (f2>f1; f2<f1) 0.02 to 2.00 Hz, step, 0.01 Hz, ≤ ± 20 mHz

Δα-measurement (α2>α1;

α2<α1)

1 ° to 80 °, step, 1 ° ≤ ± 3°

Technical data

49

Minimum measuring time 0.05 to 60.00 s, step,0.01 s, ≤ ± 1.5 % setting value or +60

ms

Maximum synch-check

extension time

0.05 to 60.00 s, step,0.01 s, ≤ ± 1 % setting value or +50 ms

Auto-Reclosing (ANSI 79)


Number of reclosing shots Up to 4

Shot 1 to 4 is individually

selectable

AR initiating functions Internal protection functions

External binary input

Dead time, separated setting for

shots 1 to 4

0.05 s to 60.00 s, step 0.01 s ≤ ± 1 % setting value or +50 ms

Reclaim time 0.50 s to 60.00s, step 0.01 s

Blocking duration time (AR reset

time)

0.05 s to 60.00s, step 0.01 s

Circuit breaker ready supervision

time

0.50 s to 60.00 s, step 0.01 s

Dead time extension for

synch-check (Max. SYNT EXT)

0.05 s to 60.00 s, step 0.01 s

VT secondary circuit supervision (97FF)

Item Range or value Tolerances

Minimum current 0.08Ir to 0.20Ir, step 0.01A ≤ ±3% setting or ±0.02Ir

Minimum zero or negative

sequence current

0.08Ir to 0.20Ir, step 0.01A ≤ ±5% setting or ±0.02Ir

Maximum phase to earth voltage 7.0V to 20.0V, step 0.01V ≤ ±3% setting or ±1 V

Maximum phase to phase

voltage

10.0V to 30.0V, step 0.01V ≤ ±3% setting or ±1 V

Normal phase to earth voltage 40.0V to 65.0V, step 0.01V ≤ ±3% setting or ±1 V

Ordering

50

Pre-configure scheme

Pre-configure scheme M01 M02 M03 M04 M05

Application(N1)

Full TB LB B B

Overcurrent protection (50, 51, 67) 1 1 1

Earth fault protection (50N, 51N, 67N) 1 1 1

Neutral earth fault protection(50G, 51G, 67G) or

sensitive earth-fault protection (50Ns, 51Ns, 67Ns) 1 1 1

Negative-sequence overcurrent protection (46) 1 1

Thermal overload protection (49) 1 1 1

Overload protection (50OL) 1 1 1 1 1

Overvoltage protection (59) 1 1 1

Under voltage protection (27) 1 1 1

Voltage displacement voltage protection (64) 1 1

Breaker failure protection (50BF) 1 1 1 1 1

Dead zone protection (50DZ) 1 1 1 1 1

STUB protection (50 STUB) 1 1 1 1 1

Poles discordance protection (50PD) 1 1 1 1 1

Synchro-check and energizing check (25) 1 1

Auto-reclosing (79) 1 1

Single- and/or three-pole tripping(94) 1 1 1 1 1

CT secondary circuit supervision 1 1 1 1 1

VT secondary circuit supervision (97FF) 1 1

1

Analogue input module (5I + 4U) 1 1 1 1 1

CPU module 1 1 1 1 1

Communication module (with Ethernet interfaces,

RS485 interfaces and time synchronizing interface) 1 1 1 1 1

Binary input module (30 BI) 1 1 1 1 1

Binary output modules (16 relays for tripping and

initiation) 2 2 2 2 1

Binary output modules (16 relays for signal) 2 2 2 2 1

Ordering

51

Power supply module 1 1 1 1 1

Programmable LEDs 18 18 18 18 18

Case, 4U,19” 1 1 1 1 1

NOTE:

n : Quantity of standard function or standard hardware, n= 1, 2, ….;

(n) : Quantity of optional function or optional hardware, n= 1, 2, ….;

N1: Application:

Full-– Full functions version;

TB-– For transformer backup protection

LB-– For line backup protection

B – For breaker protection

Ordering

52

Ordering code

C

Pre-configure scheme

M

0~9

0~9

No.1~16 No.17~36

S 1 2 -C 1

Ethernet interface:IEC61850-8; RS485 interface: IEC60870-5-103

Station Communication Protocols (T)

HMI Language (L) note

English

French

Russian

Spanish

Portuguese

Rated Frequency (F)

1

2

3

4

5

50 Hz 5

660 Hz

Ethernet interface:IEC60870-5-103; RS485 interface: IEC60870-5-103

FL T

1

2

Pre-configure scheme code

Pre-configure scheme number 1

Pre-configure scheme number 2

Note: Chinese is always offered as default HMI language.

Ordering

53

No.17~22

Communication module (C)

No.1~16

2 electrical Ethernet ports, 2 RS485 ports, IRIG-B

1

2 electrical Ethernet ports, 2 RS485 ports, Pulse

2 optical Ethernet ports, 2 RS485 ports, IRIG-B

2 optical Ethernet ports, 2 RS485 ports, Pulse

3 electrical Ethernet ports, 1 RS485 ports, IRIG-B

3 electrical Ethernet ports, 1 RS485 ports, Pulse 2

3

4

5

6

Slot 3

No.23~36

C S 1 2 -C 1

CPU Module 1 (M)3Dedicated to CSC121

Slot 2

M C

Analogue Input Module (A)

4I (1A)+ISEF (0.2A)+4U

4I (5A)+ISEF (0.2A)+4U

5I (1A)+4U

5I (5A)+4U

Slot 1

5

6

7

8

A

Ordering

54

No.23~30No.1~22

C S 1 2 -C 1

Binary Output Module (O)

16 relays for tripping

Null

3

x

Binary Input Module (I)

130BI (220V DC), with startup blocking relay

30BI (110V DC), with startup blocking relay 2

16 relays (with 19 contacts) for signalling

Slot 4

Slot 5

Slot 6

Binary Output Module (O)16 relays for tripping 1

Null


Slot 7

Binary Output Module (O)16 relays for tripping

Null


Slot 8



I O

1

3

x

1

3

x

1

Null


Slot 9



3

x

1

No.31~36

Ordering

55

No.31~36No.1~30

C S 1 2 -C 1

Case and Front Plate (K)

Case: 4U, 19'

Front plate: Medium size LCD; 20 LEDs 3

110V - 250V DC

Power Supply Module (P)1

Slot 10

P K Z

Accessories (Z)

Null x

Address: No.9 Shangdi 4th Street, Haidian District, Beijing, P.R.C. 100085Tel: +86 10 62962554, +86 10 62961515 ext.8998Fax: +86 10 82783625Email:[email protected]: http://www.sf-auto.com

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