csc-211 multifunction protection ied product guide v1.2 ... · extensive multifunction ied...

CSC-211Multifunction Protection IED

Product Guide

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Feature

2

Extensive multifunction IED including

protection, control and monitoring

functions

Three pole tripping required in

sub-transmission and distribution

network

A complete protection function library,

includes:

Overcurrent protection (50, 51,

67)

Earth fault protection (50N, 51N,

67N)

Neutral earth fault protection (50G,

51G)

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)

Dead zone protection (50DZ)

Synchro-check and energizing

check (25)

Auto-reclosing function (79)

Unbalanced current or voltage

protection

Undercurrent protection (37)

load shedding function

Voltage transformer secondary

circuit supervision (97FF)

Current transformer secondary

circuit supervision

Fast overcurrent/busbar protection

scheme using IEC61850 GOOSE-

-message

User definable LEDs, binary inputs and

outputs.

Primary apparatus local/remote control

function

Programmable interlock logic

Tripping and closing circuit

supervision

Opening and closing lockout

function

CB status supervision

Self-supervision to all modules in the

IED

Complete and massive reports

recording, trip reports, alarm reports,

startup reports and operation reports.

Any kinds of reports can be stored no

less than 40 items, and be memorized

in case of power disconnection

Up to two 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 port is able

to communicate with substation

automation system by IEC60870-5-103

protocol

Time synchronization via network

Feature

3

(SNTP), pulse and IRIG-B mode

Versatile human-machine interface,

graphic or alphanumeric options

Multifunctional software tools set for

setting, monitoring, fault recording

analysis, configuration, logic

programming etc.

Function

4

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

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 protection and control function

Breaker failure protection 50BF RBRF

3I> BF

I0>BF

I2>BF

Dead zone protection 50DZ

Synchro-check and energizing check 25 RSYN

Auto-reclosing 79 RREC O→I

Three-pole tripping 94-3 PTRC

Capacitor bank protection

Unbalanced current protection 46NC

Unbalanced voltage protection 46NU

Function

5

Undercurrent protection 37 I<

Load shedding function

Underfrequency load shedding function 81U

Undervoltage load shedding function 27

Overload load shedding function

Secondary system supervision

CT secondary circuit supervision

VT secondary circuit supervision 97FF

Other functions

Fast busbar protection using reverse

interlocking

Disturbance recorder

Control functions

Description ANSI Code IEC 61850

Logical Node Name

IEC 60617

graphical symbol

Remote/Local circuit breaker, disconnector

and other switching devices control

Programmable interlock logic

Tripping and closing circuit supervision

Opening and closing lockout function

Monitoring functions

Description

Status of circuit breaker, disconnector and other switching device monitoring

Circuit breaker operating status supervision

Auxiliary contacts of circuit breaker supervision

Self-supervision

Function

6

Station communication

Description

Front communication port

Isolated RS232 port or RJ45 Ethernet port

Rear communication port

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

0-2 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

Setting

IED testing

Disturbance recording analysis

IED configuration

Printing

Function

7

59 3U>

PTOV

27 3U<

PTUV

25

MONITORING

STATIONCOMMUNICATION

50 3I >>>

PIOC

50N I0>>>

PIEF

PTOC

51/67 3I> 3I>>

51N/67N I0> I0>>

PTEF

50BF

RBRF

3I>BF

- RS232/485 - RJ45/FO- IEC61850 - IEC60870-5-103

37

Ith

PTTR

49

46

50Ns

51Ns/67Ns

32

55

46NU

64

79 O→I

RREC

MEASUREMENT

INTERLOCK

&

CONTROL

ENERGY METERCALCULATED

UE>

RSYN

3INE>>

3INE>

46NI

Disturbance recording

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

Settable 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

First definite stage and inverse time

stage can be set individually to alarm

or trip

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

Under voltage criteria checking

(selectable), blocking of the definite

time stages is possible when the

measured voltage exceeds the

threshold

Inrush restraint function

The protection relay may detect large

magnetizing inrush currents during

transformer energizing. In addition to

considerably unbalanced fundamental

current, inrush current comprises large

second 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 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.

Protection

9

Forward

UBC_Ref

ΦPh_Char

IA

IA-

0°

90°

Bisector

Figure 1 Direction detection characteristic of

overcurrent protection directional element

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.

Under voltage criteria

To prevent any malfunction of the

overcurrent element during reverse

charging of motors, the definite time stage

of overcurrent element is able to operate

only when at least one phase-to-phase

voltage falls less than the low voltage

settable threshold .The low voltage

element can be set for each definite time

stage.

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/non-directional




applications

Each stage can be set individually for

inrush restraint

Settable maximum inrush current

Inrush restraint function adopting 2nd

harmonic measured phase or earth

current (settable)

Protection

10

First definite stage and inverse time

stage can be set individually to alarm

or trip


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 currentss 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


zero sequence directional element

where:

Ф0_Char: The settable characteristic angle

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

.


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

considerably unbalanced fundamental

current, Inrush current comprises large

second harmonic current which doesn’t

Protection

11

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 mal-operation.

Since inrush current cannot be more than a

specified value, the inrush restraint

provides an upper current limit in which

blocking does not occur.

Neutral earth fault protection (50G, 51G)

The neutral earth fault protection focuses

on phase to earth faults. The measuring

current is the one from dedicated neutral

CT.







Each stage can be set individually to

alarm or trip

Neutral current is measured from

dedicated neutral CT

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

Sensitive earth fault directional element

with Cos Φ 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

Protection

12

neutral earthed 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_Char: 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

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 earthed

impedance where the earth fault current is

extremely small.

Negative-sequence overcurrent protection (46)

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:

Protection

13






The first definite stage and inverse

stage can be set individually as alarm

or trip stage

Furthermore, this protection function may

be used to detect interruptions, faults and

polarity problems with CT.


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 memorized thermal overload

protection operates based on an

approximate replica of the temperature rise

in the protected object caused by overload.

The 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.


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 or tripping.

Overvoltage protection (59)

The overvoltage protection detects

abnormal 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.



First stage can be set to alarm or trip

Measuring voltage between

phase-earth voltage and phase-phase

(selectable)

Three phase or single phase voltage

connection

Settable dropout ratio

Undervoltage protection (27)

The Undervoltage protection provides

protection against dangerous voltage

drops, especially for electric machines.

Protection

14

The protection function provides following

features:


First stage can be set to alarm or trip

Measuring voltage between

phase-earth voltage and phase-phase

selectable

Current criteria supervision

Circuit breaker aux. contact

supervision

VT secondary circuit supervision, the

under voltage 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:



4 kinds of IEC inverse time



The first definite stage and inverse

stage can be set to alarm or trip

Faulty phase discrimination

3U0 based on calculated summation of

3 phase voltage or measured injected

residual voltage

Breaker failure protection (50BF)

The circuit breaker failure protection is able

to detect a failure of the circuit breaker

during a fault clearance. It ensures fast

back-up tripping of surrounding breakers

by tripping relevant bus sections.

Once a circuit breaker operating failure

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.

In the event of a circuit breaker failure with

a busbar fault, 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 currents, zero and negative

sequence current to achieve a higher

security.

The function can be set to give three phase

re-trip of the own breaker to avoid

unnecessary tripping of surrounding

breakers at an incorrect starting due to

mistakes during testing.

Two trip stages (local CB and

surrounding breaker tripping)

Protection

15

Transfer trip command to the remote

line end in second stage

Internal/ external initiation

Three phase CBF initiation for

sub-transmission system and

distribution system

Settable CB Aux contacts checking

Current criteria checking (including

phase current, zero and negative

sequence current)


The IED provides dead zone protection to

protect the area, between circuit breaker

and CT in the case that CB is open,

meaning dead zone. 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 is applied,

once a fault occurs in the dead zone, the

IED trips the relevant busbar zone.

Tripping logic is illustrated in Figure 6.

When one line side CT is applied, when 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.

Figure 6 Tripping logic when applying bus side CT

Figure 7 Tripping logic when applying line side CT

Protection

16

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 and

manual closing (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

Synchro-check reference voltage supervision

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

disappeared, the protection will re-trip the

breaker. Main features of the

auto-reclosing are as follows:

4 shots automatic reclosing

(selectable)

Individually settable dead time for each

shot

Internal/external AR initiation

Three phase AR operation

CB ready supervision

CB Aux. contact supervision

Cooperation with internal synch-check

function for reclosing command

Unbalanced current or voltage protection (46)

The purpose of the unbalance detection

scheme is to remove fuse operated a

capacitor bank from the network. This will

prevent damaging overvoltage across the

remaining capacitor units/elements where

the fuse operation occurs.

Protection

17

Unbalance detection scheme is set up to

signal an alarm upon an initial failure in a

bank. Upon subsequent critical failures, the

bank will be tripped from the connected

network. According to the used

unbalanced voltage/current, the IED

supports different protection schemes

mentioned in the typical connections.

The IED provides three analog channels to

monitor unbalance status. If only one

unbalanced channel is used, the other two

channels can be reserved. To avoid

mal-operation, breaker auxiliary contact is

necessary as a criterion.


Under current protection is used to prevent

reconnection of the charged capacitor

bank to energized network when a short

loss of supply voltage occurs.

Once under current protection operates,

the CB closing circuit will be interrupted

and reset after a certain time. Additionally,

time to resetting will be displayed on the

HMI.

Capacitor overload protection (50OL)

The current overload protection is provided

to protect the capacitor bank against the

faults due to overvoltage which leads to

dielectric breakdown.

The tripping and alarming capability are

provided and can be enabled or disabled

separately.

Load shedding function

The IED provides three kinds of load

shedding functions listed below.

Under frequency load shedding protection

The function monitors the network

abnormality by detection of frequency

reduction. When the system frequency falls

down to a threshold frequency with

following conditions satisfied, specified

load will be removed.

Up to four stages (L01 only)

Under voltage checking

Rate of frequency (df/dt) checking

CB position checking

Load current checking

VT secondary circuit supervision

Under voltage load shedding

This kind of load shedding is to prevent the

voltage collapse and uncontrolled loss of

load.

Low voltage load shedding is necessary

when the network is connected with a huge

system with vast power capacity. Under

this condition, “Low Frequency Load

Shedding Scheme” cannot work properly.

“Low Voltage Load Shedding Scheme"

would be a useful criterion whenever

Automatic Voltages Regulator (AVR) is out

of service or not equipped with following

conditions satisfied.



Negative sequence voltage checking

Protection

18

Rate of voltage (du/dt) checking

CB position checking

Load current checking


Overload load shedding

The IED provides a load shedding function

based on the load current passing through

feeder. This function will be essential in

conditions that feeder is connected to a

huge network with constant frequency and

additional AVR is continuously used for

voltage regulation. In this case, load

shedding protection should be done based

on load current and monitoring of following

items



Rate of voltage (du/dt) checking (in the

case of voltage connection)

Rate of frequency (df/dt) checking (in

the case of voltage connection)

VT secondary circuit supervision (in the

case of voltage connection)

Fast busbar protection scheme

The IED provides fast busbar protection

which is achieved based on operation with

GOOSE signals, it is able to block the

incoming feeder protection IED function by

reception of a defined GOOSE signals

from the outgoing feeder linked with the

same busbar.

The principle illustrated in the following

figure:

If the fault occurs on outgoing feeder C, the

protection IED C will trip and send block

messenger to IED A to block IED A

relevant protection function.

Figure 8 operation when fault on the feeder C

Protection

19

Figure 9 operation when fault on the Busbar

Once the fault located on the busbar, there

is not one protection IED of outgoing

feeder to trip and block the IED A. So the

IED A will trip and clear off the fault with

short time delay.

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, due to 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

C

The prim

breaker

etc, can

modes,

Rem

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Blk Rem Access

3Ph CB Open

BI22(CB IN SERVICE )

BI23(SPRING NOT

CHARGED)

BI24(TR RELAY OPERATED

BI25(TRIP COIL FAULTY )

BI21(EXT. INTERLOCK)

ntroratuses, suc

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Substation

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20

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Monitoring

21

Phase-sequence of voltage and current supervision

The phase-sequence of three phase

voltage and current are monitored in the

normal condition to determine that the

secondary circuit of CT or VT is connected

with IED correctly.

3I0 polarity supervision

The IED compare the magnitude and

phase angle of the calculated zero

sequence current with the measured one

to determine that the polarity is connected

in a right way.

The third harmonic of voltage supervision

If the third harmonic voltage is excessive,

the alarm without blocking protection will

be given with delay time for checking of the

secondary circuit of voltage transformer.

Auxiliary contacts of circuit breaker supervision

Current flowing through the transmission

line and connected CB aux. contacts are

monitored in phase segregated. Therefore,

the conflict condition is reported as alarm.

For example, If CB aux. contacts indicate

that CB is open in phase A and at the same

time flowing current is measured in this

phase, related alarm is reported.

Broken conductor detection

The main purpose of the broken conductor

detection function is to detect the broken

conductors on protected transmission lines

and cables. Detection can initiate an alarm

or tripping.

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

The sampled data from the redundant

A/D sampling channels compare with

each other in real time. If the difference

exceeds the specified threshold, it will

be considered as analog input channel

fault and the protection will be blocked

immediately

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.

Fault locator

The built-in fault locator is an impedance

measuring function giving the distance

from the IED measuring location to the

fault position in km. The IED reports fault

location after the IED tripping.

Communication

22

Station communication

Overview

The IED is able to connect to one or

more substation level systems or

equipments simultaneously, through the

communication ports with communica-

-tion protocols supported. (Shown in

Figure 12)


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.

Figure 12 Connection example for multi-networks of station automation system

Note: All four ports can work in parallel

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.

Time synchronization port

Software Tools

23

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 synchro-

-nization can be applied.

Figure 13 illustrates the optional time

synchronization modes.

Figure 13 Time synchronizing modes

So

A user-

enginee

and m

function

cycle of

Mod

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Figure 14

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Binary inputs

xport of

protection

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24

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For advance

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For advance

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Precise fault

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S

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Figure 16

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Figure 17 D

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alization of

and zone d

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ected acces

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Disturbance r

rule out

diagrams wi

curves

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26

record wavefo

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d

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Testing and

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diagnostic

pport in the

parameter s

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functions –

commissio

etting,

–

ning

Hardware

27

Front plate

The whole front plate is divided into zones,

each of them with a well-defined

functionality:

Figure 18 The option 1 of view of IED front plate

1 Liquid crystal display (LCD), alpha-

-numeric display only

2 8 LEDs

3 Navigation keys

4 Reset key

5 Quit key

6 Set key

7 RS232 communication port

Figure 19 The option 2 of view of IED front plate

for advanced IED version only

1 Liquid crystal display (LCD), alpha-

-numeric and graphic display

2 16 LEDs

3 Quit key

4 Reset key

5 Set key

6 Navigation keys

7 RJ45 Ethernet communication port

8 R/L Remote/Local control switch key

9 LCD display switch key

10 Controlled objects select key

11 Control operation confirm key

12 Open key

13 Close key

Hardware

28

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.

3 dedicated high accurate current

transformers (optional) are used for

metering.

CPU module (CPU)

The CPU module handles all protection

functions and logic, hardware

self-supervision and performs

communication and information exchange

between the protection system and

external equipments such as HMI, PC,

monitor, control system, substation

automation system, engineer station, RTU

and printer, etc. Additionally, the CPU

module transmits remote metering, remote

signaling, SOE, event reports and record

data. The module also provides binary

inputs, synchronization and communica-

-tion ports.

The pulse, IRIG-B or SNTP mode can be

applied for time synchronization.

According to requirement, up to 2 isolated

electrical or optical Ethernet ports (optical

Ethernet ports optional) and up to 2 RS485

serial communication port can be provided

to meet the demands of different

substation automation system and RTU at

the same time.

There are 7 binary input channels (DC24V)

in the CPU module for standard version.

There are 3 binary input channels (DC24V)

in the CPU module for advanced version.

Direct binary Output Module (DOM)

This module is used to provide fast tripping

outputs and initiating outputs for protection

functions, and signaling output, for

standard version only.

10 binary output relays with 10 contacts in

5 groups are provided in the FOM of

standard version.

Direct binary Input & Output module (DIO)

In this module, the fast binary inputs are

used to connect with the signals and

alarms. The fast binary outputs are used

for the tripping outputs and initiating

outputs for protection functions, or

signaling output.

4 binary inputs and 7 binary output relays

are provided in this module of standard

version.


are provided in this module of advanced

version.

Binary Input & Output module (BIO)

In this module, the output contacts are

used for controlling and signaling outputs

mainly. The binary inputs are used to

connect with the input signals and alarms.


have been provided in this module of

standard version.


are provided in this module of advanced

version.

Power Supply Module (PSM)

The power supply module is used to

provide the correct internal voltages and

full isolation between the terminal and the

Hardware

29

battery system. The module of standard

version provides 9 binary input channels.

And the module of advanced version

provides 10 binary input channels as well.

Hardware

30

Dimension

A

E

Figure 20 Case of CSC211 protection IED

Table 2 Dimension of the IED

Legend A B C D E F

Dimension (mm) 177 231 193.8 220.8 149 193.5

Figure 21 Cutout for flush mounting on the panel

Table 3 Dimension of the cutout

Legend A B C D E

Dimension (mm) 199.5 213.5 101.6 156 6.5

Connection

31

A. Typical rear terminal diagram of standard version

Connection

32

B. Typical rear terminal diagram of advanced version

Connection

33

Connection

34

C. Typical analogue input connection for incoming or outgoing feeder protection or line backup protection

Figure 22 Application of feeder protection to measure three phase and earth currents

Figure 23 Application of feeder protection to measure three phase and earth currents and three phase

voltages (bus side)

Connection

35

Figure 24 Application of feeder protection to measure three phase and earth currents and three phase

voltages (line side)

Connection

36

Figure 25 Application of feeder protection to measure three phase and earth currents and single phase

voltage (Ph-Ph) (bus side)

Connection

37

Figure 26 Application of feeder protection to measure three phase and earth currents and single phase

voltage (Ph-E) (bus side)

Connection

38

Figure 27 Application of feeder protection to measure three phase currents, earth current, and

sensitive earth current

Connection

39

Figure 28 Application of feeder protection to measure three phase currents, earth current and sensitive

earth current, and three phase voltages (bus side)

Connection

40


earth current, and three phase voltages (line side)

Connection

41


earth current, and single phase voltage (Ph-Ph) (bus side)

Connection

42

Figure 31 Application of feeder protection to measure three phase currents, earth current, and

sensitive earth current, and single phase voltage (Ph-E) (bus side)

Connection

43

D. Typical analogue input connection for transformer backup protection

IA

IB

IC

IN

AIM2

ABC

* * *

I01

I03

I05

I07

I02

I04

I06

I08

I01

AIM1

I02I1

*

Figure 32 Application of transformer backup protection to measure three phase currents, earth current,

and neutral current

Connection

44

Figure 33 Application of transformer backup protection to measure three phase currents, earth current

and neutral current, and three phase voltages (bus side)

Connection

45


and neutral current, and three phase voltages (line side)

Connection

46


and neutral current, and single phase voltage (Ph-Ph) (bus side)

Connection

47

IA

IB

IC

IN

AIM2

ABC

* * *

I01

I03

I05

I07

I02

I04

I06

I08

I01

AIM1

I02 I1

UB

UA

UC

UN

U01

U02

U03

U04

AIM2

*


and neutral current, and single phase voltage (Ph-E) (bus side)

Connection

48

E. Typical analogue input connection for synch-check function

Figure 37 Typical connection for synch-check on bus coupler applications

Connection

49

Figure 38 Typical connection for synch-check and feeder current protection

Connection

50

F. Typical analogue input connection for capacitor bank protection

ABC

Capacitor bank

IC1

IC2

IC3

AIM1

*

*

* I03

I05

I07

I04

I06

I08

Figure 39 Typical connection for capacitor bank unbalanced current protection with three current

inputs

Figure 40 Typical connection for capacitor bank unbalanced voltage protection with three voltage

inputs

Connection

51

Figure 41 Typical connection for capacitor bank unbalanced current protection with one current input

Figure 42 Typical connection for capacitor bank unbalanced voltage protection with one voltage input

Connection

52

Figure 43 Unbalanced current detection for

grounded capacitor bank

Figure 44 Neutral current differential protection

for grounded Split-Wye capacitor bank

Figure 45 Neutral current protection for

ungrounded split-Wye capacitor bank

Figure 46 Three unbalanced currents detection

for capacitor bank

Figure 47 Neutral voltage unbalanced protection

for unrounded Wye capacitor bank

Figure 48 Neutral voltage unbalanced detection

for ungrounded split-Wye capacitor bank

Connection

53

Figure 49 Summation of Intermediate tap-point

voltage for grounded Wye capacitor bank

Figure 50 Neutral voltage unbalance detection by

3VTs for unrounded Wye capacitor bank

Figure 51 Neutral voltage protection for

ungrounded split-Wye capacitor bank

Figure 52 Three unbalanced voltages detection

for Capacitor Bank

G. Typical analogue input connection for Load shedding function

CSC-211 CSC-211 CSC-211 CSC-211 CSC-211

Figure 53 Typical connection for load shedding function

Technical data

54

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

Thermal overload capability for

sensitive CT

IEC 60255‐27

DL/T 478‐2001

100 A for 1 s

3 A 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 IEC60255-1 100 to 125V

195 to 250V

Permissible tolerance IEC60255-1 ±%20 Uaux

Power consumption at quiescent

state

IEC60255-1 ≤ 50 W per power supply module

Technical data

55

Power consumption at maximum

load

IEC60255-1 ≤ 60 W per power supply module

Inrush Current IEC60255-1 T ≤ 5 ms/I≤ 35 A

Binary inputs

Item Standard Data

Input voltage range IEC60255-1 110/125 V

220/250 V

Threshold1: guarantee

operation

IEC60255-1 154V, for 220/250V

77V, for 110V/125V

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

66V, for 110V/125V

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

time

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

Max. 1 W/input, 220V

Binary outputs

Item Standard Data

Max. system voltage IEC60255-1 250V /~

Current carrying capacity IEC60255-1 5 A continuous,

30A，200ms ON, 15s OFF

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

L/R>40 ms

1000 VA(AC)

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

110V , 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

56

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 1

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

57

Communication speed 100 Mbit/s

For IEC 60870-5-103 protocol

Communication speed 100 Mbit/s

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×1/2 19inch

Weight ≤ 5kg

Technical Data

58

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

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 V

Technical Data

59

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

60

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

61

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

62

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

63

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=

_

B k ≤ ±5% setting + 40ms, at 2


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 　170° ≤ ±3°, at phase to phase

Technical Data

64

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


_

B k 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

sequence directional element 　160°

≤ ±3°, at 3U0≥1V

Characteristic angle 0° to 90°, step 1°

Technical Data

65

Operating area range of negative

sequence directional element 　160°

≤ ±3°, at 3U2≥2V


Non-directional neutral earth fault protection (ANSI 50G, 51G)

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









Technical Data

66

Sensitive/normal 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=A

i

I_SETP 1

B k



with IEC60255-151









Directional element for sensitive earth-fault protection

principles I cos Φ

Φ (V0 / I0)”

Technical Data

67

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 　160° ≤ ±3°

Negative sequence current 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,


Ai

I_SETP 1



with IEC60255-151







Technical Data

68



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 ratio >0.95

Reset time of stage 1 < 20ms

Dead zone protection (ANSI 50DZ)


Technical Data

69


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

200% operating setting

Reset ratio >0.95

Under voltage 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

phase-to-earth voltages

≤ ±3 % setting or ±1 V

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

Technical Data

70

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

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

∆α-measurement (α2>α1;

α2<α1)

1 ° to 80 °, step, 1 ° ≤ ± 3°

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 0.05 s to 60.00s, step 0.01 s

Technical Data

71

time)

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

Load shedding protection


Under Frequency Load shedding

Frequency for fr =50Hz 45.50 to 50.00 Hz, step 0.01 Hz ≤ ±20 mHz

Time delay 0.05 to 60.00s, step 0.01 ≤ ±1.5 % setting or +60 ms

Under Voltage Load shedding

Voltage 50 to 110 V, step 1V ≤ ±3 % setting or ±1 V

Time delay 0.10 to 60.00s, step 0.01 s

≤ ±1.5 % setting or +60 ms, at


Overload Load shedding

Phase current 0.08 to 20 A for Ir =1A

0.25 to 100 A for Ir =5A

≤ ±3% setting or ±0.02Ir

Time delay 0.10 to 60.00s , step 0.01 s ≤ ±1.5 % setting or +60 ms, at


Blocking condition

Frequency change rate ∆f/∆t 1 to 10 Hz/s ≤ ±0.5 Hz/s

Voltage change rate ∆u/∆t 1 to 100 V/s, step 1 V/s ≤ ±3 % setting or ±1 V

Blocking voltage 10 to 120V, step 1 V ≤ ±3 % setting or ±1 V

Blocking current 0 to 2 Ir ≤ ±3% setting or ±0.02Ir

Operating time Approx. 60 ms

Reset time Approx. 60 ms

Under voltage blocking reset ratio Approx. 1

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

Technical Data

72

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

Ordering

73

Pre-configure scheme of standard version

Table 4 Function and hardware of the pre-configure scheme (1)

Pre-configure scheme M01 M02 M03 M04 M05 M06 M07

Application (N1) Full TB CF F SF SF BCPU

Non-directional overcurrent protection

(50,51) 1 1

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

Non-directional earth fault protection

(50N, 51N) 1 1

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

Non-directional sensitive earth fault

protection (50Ns, 51Ns) 1 1

Sensitive earth fault protection (50Ns,

51Ns, 67Ns) 1 1 1 1 1

Neutral earth fault protection (50G,

51G) 1 1

Negative sequence overcurrent

protection (46) 1 1

Thermal overload protection (49) 1 1


Overvoltage protection (59) 1 1 1 1

Under voltage protection (27) 1 1 1 1

Displacement voltage protection (64) 1 1

Breaker failure protection (50BF) 1 1 1 1

Dead zone protection (50DZ) 1 1 1 1

Synchro-check and energizing check

(25) 1 1 1 1

Auto-reclosing (79) 1 1 1 1 1

Unbalanced current protection (46NI)

Unbalanced voltage protection (46NU)


Low frequency load shedding function 1 1 1 1 1

Ordering

74

(81U)

Low voltage load shedding function

(27) 1 1 1 1 1

Overload load shedding function 1 1 1 1 1

CT secondary circuit supervision 1 1 1 1 1 1


(97FF) 1 1 1 1 1 1

Fast busbar protection using reverse

interlocking (1) (1) (1) (1) (1)

Analogue input module 1 1 1 1 1 1 1 1

Analogue input module 2 1 1 1 1 1 1 1

Binary input/output module (1) (1) (1) (1) (1) (1) 1

CPU module 1 1 1 1 1 1 1

Direct binary input and output module 1 1 1 1 1 1 1

Binary output module 1 1 1 1 1 1

Power supply module 1 1 1 1 1 1 1

Human interface 1 1 1 1 1 1 1

Case, 4U,1/2 19” 1 1 1 1 1 1 1

Ordering

75

Table 5 Function and hardware of the pre-configure scheme of standard version (2)

Pre-configure scheme V01 V02 C01 C02

Application (N1) V V C C

Non-directional overcurrent protection (50,51)

Overcurrent protection (50,51,67) 1 1

Non-directional earth fault protection (50N, 51N)

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

Non-directional sensitive earth fault protection (50Ns, 51Ns)

Sensitive earth fault protection (50Ns, 51Ns, 67Ns) 1 1


Negative sequence overcurrent protection (46)


Overload protection (50OL) 1 1

Overvoltage protection (59) 1 1 1 1

Under voltage protection (27) 1 1 1 1

Displacement voltage protection (64) 1 1 1 1

Breaker failure protection (50BF) 1 1

Dead zone protection (50DZ) 1 1

Synchro-check and energizing check (25)

Auto-reclosing (79)

Unbalanced current protection (46NI) 1

Unbalanced voltage protection (46NU) 1

Undercurrent protection (37) 1 1

Low frequency load shedding function (81U)

Low voltage load shedding function (27)

Overload load shedding function

CT secondary circuit supervision 1 1

VT secondary circuit supervision (97FF) 1 1 1 1

Fast busbar protection using reverse interlocking (1) (1)

Ordering

76

Analogue input module 1 1 1

Analogue input module 2 1 1 1 1

Binary input/output module (1) (1) (1) (1)

CPU module 1 1 1 1

Binary direct input and output module 1 1 1 1

Binary output module 1 1 1

Power supply module 1 1 1 1

Human interface 1 1 1 1

Case, 4U,1/2 19” 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

CF – For complicated feeder

F – For feeder

SF – For simple feeder

V – For dedicated voltage protection IED

C – For dedicated capacitor protection IED

BCPU: Feeder control and protection unit with advanced interlocking logic

Ordering

77

Pre-configure scheme of advanced version

Table 6 Function and hardware of the pre-configure scheme

Pre-configure scheme M10 L01

Application (N1) AD LS

Non-directional overcurrent protection (50,51)

Overcurrent protection (50,51,67) 1

Non-directional earth fault protection (50N, 51N)

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

Non-directional sensitive earth fault protection (50Ns, 51Ns)

Sensitive earth fault protection (50Ns, 51Ns, 67Ns) 1


Negative sequence overcurrent protection (46)


Overload protection (50OL) 1

Overvoltage protection (59) 1

Under voltage protection (27) 1

Displacement voltage protection (64) 1

Breaker failure protection (50BF)


Synchro-check and energizing check (25) 1

Auto-reclosing (79) 1

Unbalanced current protection (46NI)

Unbalanced voltage protection (46NU)


Low frequency load shedding function (81U) 1 1

Low voltage load shedding function (27) 1

Overload load shedding function 1

CT secondary circuit supervision

Ordering

78

VT secondary circuit supervision (97FF) 1 1

Fast busbar protection using reverse interlocking

Analogue input module 1 1

Analogue input module 2 1 1

Binary input/output module 2 2

CPU module 1 1

Direct binary input and output module 1 1

Power supply module 1 1

Front plate 1 1

Case, 4U,1/2 19” 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

CF – For complicated feeder

F – For feeder

SF – For simple feeder

V – For dedicated voltage protection IED

C – For dedicated capacitor protection IED

BCPU - Feeder control and protection unit with advanced interlocking logic

AD – Advanced version

LS – Advanced load shedding version

Ordering

79

Ordering code of standard version

Ordering

80

Ordering

81

Ordering

82

Ordering code of advanced version

Ordering

83

No.17~25

Analogue Input Module 1 (A)Isef +1Im (For pre-configure scheme Mxx only)

I0(1A) +1Im (For pre-configure scheme Mxx only)

I0(5A) +1Im (For pre-configure scheme Mxx only)

6

7

Slot1

No.26~35

8

Null x

3Ip(1A)+I0(5A)+2Im+4U (For pre-configure scheme Mxx only)

3Ip(1A)+I0(1A)+2Im+4U

3Ip(5A)+I0(1A)+2Im+4U (For pre-configure scheme Mxx only)

3Ip(5A)+I0(5A)+2Im+4U

Slot2

M

1

2

3

4

CPU module (M)Slot4

3BI (24V), 3 Ethernet RJ45 ports, 1 RS232 port, IRIG-B

3BI (24V), 2 Ethernet RJ45 ports, 2 RS485 port, 1 RS232 port, IRIG-B

Binary Input and Output module (B)Slot3

5BI (220V) + 8 relays

Null

5BI (110V) + 8 relays

Slot5

5BI (220V) +8 output relays

5BI (110V) +8 output relays

Binary Input and Output module (B)

A B

1

2

x

1

2

B

1

2

No.1~16

C S 2 1 -C 1

Analogue Input Module 2 (A)

3BI (24V), 2 Ethernet optical ports, 1 RS232 port, IRIG-B 3

Null x

Ordering

84

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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