ABB Relion REQ650 User manual

Relion

®

650 series

Breaker protection REQ650 ANSI

Product Guide

Contents

1. 650 series overview.................................................3

2. Application...............................................................3

3. Available functions..................................................6

4. Current protection.................................................16

5. Voltage protection.................................................19

6. Frequency protection............................................19

7. Secondary system supervision.............................20

8. Control...................................................................21

9. Logic......................................................................22

10. Monitoring............................................................24

11. Metering...............................................................26

12. Human Machine interface....................................27

13. Basic IED functions..............................................27

14. Station communication........................................28

15. Hardware description...........................................30

16. Connection diagrams...........................................32

17. Technical data......................................................42

18. Ordering................................................................84

Disclaimer

The information in this document is subject to change without notice and should not be construed as a commitment by ABB AB. ABB AB assumes no

responsibility for any errors that may appear in this document.

Trademarks

ABB and Relion are registered trademarks of ABB Group. All other brand or product names mentioned in this document may be trademarks or

registered trademarks of their respective holders.

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

2 ABB

1. 650 series overview

The 650 series IEDs provide optimum 'off-the-

shelf', ready-to-use solutions. It is configured

with complete protection functionality and

default parameters to meet the needs of a wide

range of applications for generation

transmission and sub-transmission grids.

The 650 series IEDs include:

• Complete ready to use solutions optimized

for a wide range of applications for

generation, transmission and sub-

transmission grids.

• Support for user-defined names in the local

language for signal and function engineering.

• Minimized parameter settings based on

default values and ABB's new global base

value concept. You only need to set those

parameters specific to your own application,

such as the line data.

• GOOSE messaging for horizontal

communication.

• Extended HMI functionality with 15 dynamic

three-color-indication LEDs per page, on up

to three pages, and configurable push-button

shortcuts for different actions.

• Programmable LED text-based labels.

• Settable 1A/5A -rated current inputs.

2. Application

Breaker protection REQ650 provides a

standalone solution for applications, where

synchronism check controlled closing of the

circuit breaker is required, but the integration

of the automatic reclosing function into the

main line protection IED is not preferred or

suitable. The advanced automatic reclosing,

synchronizing, synchrocheck and energizing

check functions of REQ650 provides an

optimized stand alone product. This IED also

enables well-structured and reliable protection

and control systems especially in systems

where complete bay control functionality

including interlocking is not required.

REQ650 provides backup to the main

protection with redundant protection and

control functions.

Three pre-configured packages have been

defined for following applications:

• Backup protection functions in a breaker

bay giving three-phase trip (A01A). The

connection of the bay is to a single or

double busbar section.

• A breaker bay connecting a transmission

line, with back-up protection functions

enabling single phase trip (A11A). The

connection of the bay is only to a single

busbar section.

• A breaker bay connecting a transmission

line, with back-up protection functions

enabling single phase trip (B11A). The

connection of the bay can be made to the

double busbar sections.

The backup protection is mainly based on

current and voltage based functions. In line

protection applications, autoreclosing with or

without synchronism check is available.

The package is delivered pre-configured and

ready for use in the power system. Analogue

inputs and binary inputs/outputs circuits are pre-

defined.

The pre-configured IED can be modified and

adapted to suit specific applications with the

graphical configuration tool, using the glue

logic and adjusting the parameter settings.

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

Revision: -

ABB 3

REQ650-A01A – Single Busbar Single breaker 10AI (4I+1I+5U)

Three phase variant

SMB RREC

79 0->1

SMP PTRC

94 1->0

SES RSYN

25 SYNC

TCS SCBR

Cond

SPVN ZBAT

Cond

Other configured functions

OV2 PTOV

59 3U>

PH PIOC

50 3I>>

CC RBRF

50BF

V MMXU

Meter.

C MMXU

Meter.

ETP MMTR

Wh<->

BKR1

189

989

989G

389G

289G

EF4 PTOC

51N/67N

IN>

WA1

C MSQI

Meter.

V MSQI

Meter.

CV MMXN

Meter.

CC RPLD

52PD

DRP RDRE

Mont.

V MMXU

Meter.

IEC61850

ANSI IEC

Function Enabled

in Settings

DNP

ANSI IEC

Function Disabled in Settings

132 kV Bus

1000/1

132kV/110V

OC4 PTOC

51/67 3I>

ANSI11000142_1_en.vsd

SDE PSDE

67N IN<->

L PTTR

26

BRC PTOC

46 Iub

SDD RFUF

60FL

S SCBR

Cond

S SIMG

63

>

IEC60870-5-103

ANSI IEC

ANSI11000142 V1 EN

Figure 1. A typical backup protection functions in a breaker bay giving three-phase trip

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

4 ABB

BKR1

189

289

989

989G

389G

289G

WA1

WA2

132 kV Bus

132kV/110V

132kV/

110V

132kV/

110V

REQ650-B11A – Double Busbar Single breaker 10AI (4I+1I+5U)

Single phase variant

STB RREC

79 0->1

SPT PTRC

94 1->0

SES RSYN

25 SYNC

ETP MMTR

Wh<->

EF4 PTOC

51N/67N

IN>

CV MMXN

Meter.

OC4S PTOC

51/67 3I>

SDE PSDE

67N IN<->

L PTTR

26

BRC PTOC

46 Iub

SDD RFUF

60FL

S SCBR

Cond

SPT PIOC

50 I>>

CSP RBRF

50BF

C MMXU

Meter.

C MSQI

Meter.

CC RPLD

52PD

V MMXU

Meter.

OV2 PTOV

59 3U>

V MMXU

Meter.

V MSQI

Meter.

TCS SCBR

Cond

SPVN ZBAT

Cond

Other configured functions

DRP RDRE

Mont.

IEC61850

ANSI IEC

Function Enabled

in Settings

ANSI11000143_1_en.vsd

TCS SCBR

Cond

TCS SCBR

Cond

V MMXU

Meter.

S SIMG

63

>

DNP

ANSI IEC

Function Disabled in Settings

IEC60870-5-103

ANSI IEC

ANSI11000143 V1 EN

Figure 2. A typical breaker bay connecting a transmission line, with back-up protection functions

enabling single phase trip. The connection of the bay is only to a single busbar section

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 5

BKR1

189

289

989

989G

389G

289G

WA1

WA2

132 kV Bus

132kV/110V

132kV/

110V

132kV/

110V

REQ650-B11A – Double Busbar Single breaker 10AI (4I+1I+5U)

Single phase variant

STB RREC

79 0->1

SPT PTRC

94 1->0

SES RSYN

25 SYNC

ETP MMTR

Wh<->

EF4 PTOC

51N/67N

IN>

CV MMXN

Meter.

OC4S PTOC

51/67 3I>

SDE PSDE

67N IN<->

L PTTR

26

BRC PTOC

46 Iub

SDD RFUF

60FL

S SCBR

Cond

SPT PIOC

50 I>>

CSP RBRF

50BF

C MMXU

Meter.

C MSQI

Meter.

CC RPLD

52PD

V MMXU

Meter.

OV2 PTOV

59 3U>

V MMXU

Meter.

V MSQI

Meter.

TCS SCBR

Cond

SPVN ZBAT

Cond

Other configured functions

DRP RDRE

Mont.

IEC61850

ANSI IEC

Function Enabled

in Settings

ANSI11000144_1_en.vsd

TCS SCBR

Cond

TCS SCBR

Cond

V MMXU

Meter.

S SIMG

63

>

DNP

ANSI IEC

Function Disabled in Settings

IEC60870-5-103

ANSI IEC

ANSI11000144 V1 EN

Figure 3. A typical breaker bay connecting a transmission line, with back-up protection functions

enabling single phase trip. The connection of the bay can be made to one of the double

busbar sections

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

6 ABB

3. Available functions

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 7

Back-up protection functions

IEC 61850/

Function

block

name

ANSI Function description Breaker

REQ650 (A01A)

3Ph/1CB/1BB

REQ650 (A11A)

1Ph/1CB/1BB

REQ650 (B11A)

1Ph/1CB/2BB

Current protection

PHPIOC 50 Instantaneous phase overcurrent protection 1

SPTPIOC 50 Instantaneous phase overcurrent protection 1 1

OC4PTOC 51/67 Four step directional phase overcurrent

protection

1

OC4SPTOC 51/67 Four step phase overcurrent protection 1 1

EFPIOC 50N Instantaneous residual overcurrent

protection

1 1 1

EF4PTOC 51N/

67N

Four step directional residual overcurrent

protection

1 1 1

SDEPSDE 67N Sensitive directional residual overcurrent

and power protection

1 1 1

LPTTR 26 Thermal overload protection, one time

constant

1 1 1

CCRBRF 50BF Breaker failure protection 1

CSPRBRF 50BF Breaker failure protection 1 1

STBPTOC 50STB Stub protection 1 1 1

CCRPLD 52PD Pole discordance protection 1 1 1

BRCPTOC 46 Broken conductor check 1 1 1

GUPPDUP 37 Directional underpower protection 1 1 1

GOPPDOP 32 Directional overpower protection 1 1 1

DNSPTOC 46 Negative sequence based overcurrent

function

1 1 1

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

8 ABB

IEC 61850/

Function

block

name

ANSI Function description Breaker

REQ650 (A01A)

3Ph/1CB/1BB

REQ650 (A11A)

1Ph/1CB/1BB

REQ650 (B11A)

1Ph/1CB/2BB

Voltage protection

UV2PTUV 27 Two step undervoltage protection 1 1 1

OV2PTOV 59 Two step overvoltage protection 1 1 1

ROV2PTOV 59N Two step residual overvoltage protection 1 1 1

LOVPTUV 27 Loss of voltage check 1 1 1

Frequency protection

SAPTUF 81 Underfrequency function 2 2

2

SAPTOF 81 Overfrequency function 2 2 2

SAPFRC 81 Rate-of-change frequency protection 2 2 2

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 9

Control and monitoring functions

IEC 61850/

Function block

name

ANSI Function description Breaker

REQ650 (A01A)

3Ph/1CB/1BB

REQ650 (A11A)

1Ph/1CB/1BB

REQ650 (B11A)

1Ph/1CB/2BB

Control

SESRSYN 25 Synchrocheck, energizing check, and

synchronizing

1 1 1

SMBRREC 79 Autorecloser 1

STBRREC 79 Autorecloser 1 1

QCBAY Bay control 1 1 1

LOCREM Handling of LR-switch positions 1 1 1

LOCREMCTRL LHMI control of Permitted Source To

Operate (PSTO)

1 1 1

SLGGIO Logic Rotating Switch for function

selection and LHMI presentation

15 15 15

VSGGIO Selector mini switch extension 20 20 20

DPGGIO IEC 61850 generic communication I/O

functions double point

16 16 16

SPC8GGIO Single point generic control 8 signals 5 5 5

AUTOBITS AutomationBits, command function for

DNP3.0

3 3 3

I103CMD Function commands for IEC60870-5-103 1 1 1

I103IEDCMD IED commands for IEC60870-5-103 1 1 1

I103USRCMD Function commands user defined for

IEC60870-5-103

4 4 4

I103GENCMD Function commands generic for

IEC60870-5-103

50 50 50

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

10 ABB

IEC 61850/

Function block

name

ANSI Function description Breaker

REQ650 (A01A)

3Ph/1CB/1BB

REQ650 (A11A)

1Ph/1CB/1BB

REQ650 (B11A)

1Ph/1CB/2BB

I103POSCMD IED commands with position and select

for IEC60870-5-103

50 50 50

Secondary system supervision

CCSRDIF 87 Current circuit supervision 1 1 1

SDDRFUF Fuse failure supervision 1 1 1

TCSSCBR Breaker close/trip circuit monitoring 3 3 3

Logic

SMPPTRC 94 Tripping logic 1

SPTPTRC 94 Tripping logic 1 1

TMAGGIO Trip matrix logic 12 12 12

OR Configurable logic blocks, OR gate 283 283 283

INVERTER Configurable logic blocks, Inverter gate 140 140 140

PULSETIMER Configurable logic blocks, Pulse timer 40 40 40

GATE Configurable logic blocks, Controllable

gate

40 40 40

XOR Configurable logic blocks, exclusive OR

gate

40 40 40

LOOPDELAY Configurable logic blocks, loop delay 40 40 40

TIMERSET Configurable logic blocks, timer

function block

40 40 40

AND Configurable logic blocks, AND gate 280 280 280

SRMEMORY Configurable logic blocks, set-reset

memory flip-flop gate

40 40 40

RSMEMORY Configurable logic blocks, reset-set

memory flip-flop gate

40 40 40

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 11

IEC 61850/

Function block

name

ANSI Function description Breaker

REQ650 (A01A)

3Ph/1CB/1BB

REQ650 (A11A)

1Ph/1CB/1BB

REQ650 (B11A)

1Ph/1CB/2BB

FXDSIGN Fixed signal function block 1 1 1

B16I Boolean 16 to Integer conversion 16 16 16

B16IFCVI Boolean 16 to Integer conversion with

logic node representation

16 16 16

IB16A Integer to Boolean 16 conversion 16 16 16

IB16FCVB Integer to Boolean 16 conversion with

logic node representation

16 16 16

Monitoring

CVMMXN Measurements 6 6 6

CMMXU Phase current measurement 10 10 10

VMMXU Phase-phase voltage measurement 6 6 6

CMSQI Current sequence component

measurement

6 6 6

VMSQI Voltage sequence measurement 6 6 6

VNMMXU Phase-neutral voltage measurement 6 6 6

CNTGGIO Event counter 5 5 5

DRPRDRE Disturbance report 1 1 1

AxRADR Analog input signals 4 4 4

BxRBDR Binary input signals 6 6 6

SPGGIO IEC 61850 generic communication I/O

functions

64 64 64

SP16GGIO IEC 61850 generic communication I/O

functions 16 inputs

16 16 16

MVGGIO IEC 61850 generic communication I/O

functions

16 16 16

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

12 ABB

IEC 61850/

Function block

name

ANSI Function description Breaker

REQ650 (A01A)

3Ph/1CB/1BB

REQ650 (A11A)

1Ph/1CB/1BB

REQ650 (B11A)

1Ph/1CB/2BB

MVEXP Measured value expander block 66 66 66

SPVNZBAT Station battery supervision 1 1 1

SSIMG 63 Insulation gas monitoring function 1 1 1

SSIML 71 Insulation liquid monitoring function 1 1 1

SSCBR Circuit breaker condition monitoring 1 1 1

I103MEAS Measurands for IEC60870-5-103 1 1 1

I103MEASUSR Measurands user defined signals for

IEC60870-5-103

3 3 3

I103AR Function status auto-recloser for

IEC60870-5-103

1 1 1

I103EF Function status ground-fault for

IEC60870-5-103

1 1 1

I103FLTPROT Function status fault protection for

IEC60870-5-103

1 1 1

I103IED IED status for IEC60870-5-103 1 1 1

I103SUPERV Supervison status for IEC60870-5-103 1 1 1

I103USRDEF Status for user defined signals for

IEC60870-5-103

20 20 20

Metering

PCGGIO Pulse counter logic 16 16 16

ETPMMTR Function for energy calculation and

demand handling

3 3 3

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 13

Designed to communicate

IEC 61850/

Function block

name

ANSI Function description Breaker

REQ650 (A01A)

3Ph/1CB/1BB

REQ650 (A11A)

1Ph/1CB/1BB

REQ650 (B11A)

1Ph/1CB/2BB

Station communication

IEC 61850 communication protocol,

LAN1

1 1 1

DNP3.0 for TCP/IP communication

protocol, LAN1

1 1 1

IEC61870-5-103 IEC60870-5-103 serial

communication via ST

1 1 1

GOOSEINTLKRCV Horizontal communication via

GOOSE for interlocking

59 59 59

GOOSEBINRCV GOOSE binary receive 4 4 4

GOOSEDPRCV GOOSE function block to receive a

double point value

32 32 32

GOOSEINTRCV GOOSE function block to receive an

integer value

32 32 32

GOOSEMVRCV GOOSE function block to receive a

mesurand value

16 16 16

GOOSESPRCV GOOSE function block to receive a

single point value

64 64 64

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

14 ABB

Basic IED functions

IEC 61850/

Function block

name

Function description

Basic functions included in all products

INTERRSIG Self supervision with internal event list 1

SELFSUPEVLST Self supervision with internal event list 1

SNTP Time synchronization 1

TIMESYNCHGEN Time synchronization 1

DTSBEGIN,

DTSEND,

TIMEZONE

Time synchronization, daylight saving 1

IRIG-B Time synchronization 1

SETGRPS Setting group handling 1

ACTVGRP Parameter setting groups 1

TESTMODE Test mode functionality 1

CHNGLCK Change lock function 1

TERMINALID IED identifiers 1

PRODINF Product information 1

PRIMVAL Primary system values 1

SMAI_20_1-12 Signal matrix for analog inputs 2

3PHSUM Summation block 3 phase 12

GBASVAL Global base values for settings 6

ATHSTAT Authority status 1

ATHCHCK Authority check 1

FTPACCS FTP access with password 1

DOSFRNT Denial of service, frame rate control for front port 1

DOSLAN1 Denial of service, frame rate control for LAN1 1

DOSSCKT Denial of service, socket flow control 1

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 15

4. Current protection

Instantaneous phase overcurrent

protection PHPIOC (50)

The instantaneous three phase overcurrent

function has a low transient overreach and

short tripping time to allow use as a high set

short-circuit protection function.

Instantaneous phase overcurrent

protection SPTPIOC (50)

The instantaneous phase overcurrent function

for single pole tripping has a low transient

overreach and short tripping time to allow use

as a high set short-circuit protection function.

Four step phase overcurrent

protection OC4PTOC (51/67)

The four step phase overcurrent protection

function OC4PTOC (51/67) has independent

inverse time delay settings for step 1 and 4.

Step 2 and 3 are always definite time delayed.

All IEC and ANSI inverse time characteristics

are available.

The directional function is voltage polarized

with memory. The function can be set to be

directional or non-directional independently for

each of the steps.

Four step phase overcurrent

protection OC4SPTOC (51/67)

The four step phase overcurrent function for

single pole tripping (OC4SPTOC, 51_67) has an

inverse or definite time delay independent for

each step separately.

All IEC and ANSI time delayed characteristics

are available.

The directional function is voltage polarized

with memory. The function can be set to be

directional or non-directional independently for

each of the steps.

Instantaneous residual overcurrent

protection EFPIOC (50N)

The Instantaneous residual overcurrent

protection EFPIOC (50N) has a low transient

overreach and short tripping times to allow the

use for instantaneous ground-fault protection,

with the reach limited to less than the typical

eighty percent of the line at minimum source

impedance. EFPIOC (50N) can be configured to

measure the residual current from the three-

phase current inputs or the current from a

separate current input. EFPIOC (50N) can be

blocked by activating the input BLOCK.

Four step residual overcurrent

protection EF4PTOC (51N_67N)

The four step residual overcurrent protection

(EF4PTOC, 51N/67N) has independent inverse

time delay settings for step 1 and 4. Step 2 and

3 are always definite time delayed.

All IEC and ANSI inverse time characteristics

are available.

The directional function includes 3 options

• voltage polarized

• current polarized

• dual polarized

EF4PTOC (51N/67N) can be set directional or

non-directional independently for each of the

steps.

Second harmonic blocking can be set

individually for each step.

Sensitive directional residual

overcurrent and power protection

SDEPSDE (67N)

In isolated networks or in networks with high

impedance grounding, the ground fault current

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

16 ABB

is significantly smaller than the short circuit

currents. In addition to this, the magnitude of

the fault current is almost independent on the

fault location in the network. The protection

can be selected to use either the residual

current or residual power component

3V

0

·3I

0

·cos j, for operating quantity. There is

also available one non-directional 3I

0

step and

one non-directional 3V

0

overvoltage tripping

step.

Thermal overload protection, one

time constant LPTTR (26)

The increasing utilizing of the power system

closer to the thermal limits has generated a

need of a thermal overload protection also for

power lines.

A thermal overload will often not be detected

by other protection functions and the

introduction of the thermal overload protection

can allow the protected circuit to operate closer

to the thermal limits.

The three-phase current measuring protection

has an I

2

t characteristic with settable time

constant and a thermal memory.

An alarm pickup gives early warning to allow

operators to take action well before the line is

tripped.

Breaker failure protection CCRBRF

(50BF)

Breaker failure protection (CCRBRF, 50BF)

ensures fast back-up tripping of surrounding

breakers in case the protected breaker fails to

open. CCRBRF (50BF) can be current based,

contact based, or an adaptive combination of

these two conditions.

Current check with extremely short reset time

is used as check criterion to achieve high

security against unnecessary operation.

Contact check criteria can be used where the

fault current through the breaker is small.

Breaker failure protection (CCRBRF, 50BF)

current criteria can be fulfilled by one or two

phase currents, or one phase current plus

residual current. When those currents exceed

the user defined settings, the function is

activated. These conditions increase the

security of the back-up trip command.

CCRBRF (50BF) function can be programmed

to give a three-phase re-trip of the protected

breaker to avoid unnecessary tripping of

surrounding breakers.

Breaker failure protection CSPRBRF

(50BF)

Breaker failure protection for single pole

tripping applications CSPRBRF (50BF) ensures

fast back-up tripping of surrounding breakers

in case the protected breaker fails to open.

CSPRBRF (50BF) can be current based, contact

based, or adaptive combination between these

two principles.

A current check with extremely short reset time

is used as a check criterion to achieve a high

security against unnecessary operation.

A contact check criteria can be used where the

fault current through the breaker is small.

CSPRBRF (50BF) function current criteria can

be fulfilled by one or two phase currents, or

one phase current plus residual current. When

those currents exceed the user defined settings,

the function is activated. These conditions

increase the security of the back-up trip

command.

CSPRBRF (50BF) can be programmed to give a

three-phase re-trip of the protected breaker to

avoid unnecessary tripping of surrounding

breakers at an incorrect initiation due to

mistakes during testing.

Stub protection STBPTOC (50STB)

When a power line is taken out of service for

maintenance and the line disconnector is

opened, line side voltage transformers will be

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 17

on the disconnected part of the line. The

primary line distance protection will thus not

be able to operate and must be blocked.

The stub protection STBPTOC (50STB) covers

the zone between the current transformers and

the open disconnector. The three-phase

instantaneous overcurrent function is released

from a normally open, 89b auxiliary contact on

the line disconnector.

Pole discordance protection CCRPLD

(52PD)

Circuit breakers and disconnectors can end up

with their phase poles in different positions

(close-open), due to electrical or mechanical

failures.An open phase can cause negative and

zero sequence currents which cause thermal

stress on rotating machines and can cause

unwanted operation of zero sequence or

negative sequence current functions.

Normally the affected breaker is tripped to

correct such a situation. If the situation

warrants the surrounding breakers should be

tripped to clear the unsymmetrical load

situation.

The pole discrepancy function operates based

on information from the circuit breaker logic

with additional criteria from unsymmetrical

phase currents when required.

Broken conductor check BRCPTOC

(46)

Conventional protection functions can not

detect the broken conductor condition. Broken

conductor check (BRCPTOC, 46) function,

consisting of continuous current unsymmetrical

check on the line where the IED is connected

will give alarm or trip at detecting broken

conductors.

Directional over/underpower

protection GOPPDOP/GUPPDUP

(32/37)

The directional over-/under-power protection

GOPPDOP (32)/GUPPDUP (37) can be used

wherever a high/low active, reactive or

apparent power protection or alarming is

required. The functions can alternatively be

used to check the direction of active or reactive

power flow in the power system. There are a

number of applications where such

functionality is needed. Some of them are:

• detection of reversed active power flow

• detection of high reactive power flow

Each function has two steps with definite time

delay. Reset times for both steps can be set as

well.

Negative sequence based overcurrent

function DNSPTOC (46)

Negative sequence based overcurrent function

(DNSPTOC, 46) may be used in power line

applications where the reverse zero sequence

source is weak or open, the forward source

impedance is strong and it is desired to detect

forward ground faults.

Additionally, it is applied in applications on

underground cables, where zero sequence

impedance depends on the fault current return

paths, but the cable negative sequence

impedance is practically constant.

The directional function is current and voltage

polarized. The function can be set to forward,

reverse or non-directional independently for

each step.

DNSPTOC (46) protects against all unbalanced

faults including phase-to-phase faults. The

minimum pickup current of the function must

be set to above the normal system unbalance

level in order to avoid unintentional tripping.

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

18 ABB

5. Voltage protection

Two step undervoltage protection

UV2PTUV (27)

Undervoltages can occur in the power system

during faults or abnormal conditions. Two step

undervoltage protection (UV2PTUV, 27)

function can be used to open circuit breakers

to prepare for system restoration at power

outages or as long-time delayed back-up to

primary protection.

UV2PTUV (27) has two voltage steps, where

step 1 is settable as inverse or definite time

delayed. Step 2 is always definite time delayed.

Two step overvoltage protection

OV2PTOV (59)

Overvoltages may occur in the power system

during abnormal conditions such as sudden

power loss, tap changer regulating failures,

open line ends on long lines etc.

OV2PTOV (59) has two voltage steps, where

step 1 can be set as inverse or definite time

delayed. Step 2 is always definite time delayed.

OV2PTOV (59) has an extremely high reset

ratio to allow settings close to system service

voltage.

Two step residual overvoltage

protection ROV2PTOV (59N)

Residual voltages may occur in the power

system during ground faults.

Two step residual overvoltage protection

ROV2PTOV (59N) function calculates the

residual voltage from the three-phase voltage

input transformers or measures it from a single

voltage input transformer fed from a broken

delta or neutral point voltage transformer.

ROV2PTOV (59N) has two voltage steps, where

step 1 can be set as inverse or definite time

delayed. Step 2 is always definite time delayed.

Loss of voltage check LOVPTUV (27)

Loss of voltage check (LOVPTUV, 27) is

suitable for use in networks with an automatic

system restoration function. LOVPTUV (27)

issues a three-pole trip command to the circuit

breaker, if all three phase voltages fall below

the set value for a time longer than the set time

and the circuit breaker remains closed.

6. Frequency protection

Underfrequency protection SAPTUF

(81)

Underfrequency occurs as a result of lack of

generation in the network.

Underfrequency protection SAPTUF (81) is

used for load shedding systems, remedial

action schemes, gas turbine startup and so on.

SAPTUF (81) is provided with an undervoltage

blocking.

Overfrequency protection SAPTOF

(81)

Overfrequency protection function SAPTOF

(81) is applicable in all situations, where

reliable detection of high fundamental power

system frequency is needed.

Overfrequency occurs at sudden load drops or

shunt faults in the power network. Close to the

generating plant, generator governor problems

can also cause over frequency.

SAPTOF (81) is used mainly for generation

shedding and remedial action schemes. It is

also used as a frequency stage initiating load

restoring.

SAPTOF (81) is provided with an undervoltage

blocking.

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

ABB 19

Rate-of-change frequency protection

SAPFRC (81)

Rate-of-change frequency protection function

(SAPFRC,81) gives an early indication of a main

disturbance in the system. SAPFRC (81) can be

used for generation shedding, load shedding

and remedial action schemes. SAPFRC (81) can

discriminate between positive or negative

change of frequency.

SAPFRC (81) is provided with an undervoltage

blocking.

7. Secondary system

supervision

Current circuit supervision CCSRDIF

(87)

Open or short circuited current transformer

cores can cause unwanted operation of many

protection functions such as differential,

ground-fault current and negative-sequence

current functions.

It must be remembered that a blocking of

protection functions at an occurrence of open

CT circuit will mean that the situation will

remain and extremely high voltages will stress

the secondary circuit.

Current circuit supervision (CCSRDIF, 87)

compares the residual current from a three

phase set of current transformer cores with the

neutral point current on a separate input taken

from another set of cores on the current

transformer.

A detection of a difference indicates a fault in

the circuit and is used as alarm or to block

protection functions expected to give unwanted

tripping.

Fuse failure supervision SDDRFUF

The aim of the fuse failure supervision function

(SDDRFUF) is to block voltage measuring

functions at failures in the secondary circuits

between the voltage transformer and the IED in

order to avoid unwanted operations that

otherwise might occur.

The fuse failure supervision function basically

has three different algorithms, negative

sequence and zero sequence based algorithms

and an additional delta voltage and delta

current algorithm.

The negative sequence detection algorithm is

recommended for IEDs used in isolated or high-

impedance grounded networks. It is based on

the negative-sequence measuring quantities, a

high value of voltage without the presence of

the negative-sequence current 3I

2

.

The zero sequence detection algorithm is

recommended for IEDs used in directly or low

impedance grounded networks. It is based on

the zero sequence measuring quantities, a high

value of voltage 3V

0

without the presence of

the residual current 3I

0

.

A criterion based on delta current and delta

voltage measurements can be added to the fuse

failure supervision function in order to detect a

three phase fuse failure, which in practice is

more associated with voltage transformer

switching during station operations.

For better adaptation to system requirements,

an operation mode setting has been introduced

which makes it possible to select the operating

conditions for negative sequence and zero

sequence based function. The selection of

different operation modes makes it possible to

choose different interaction possibilities

between the negative sequence and zero

sequence based algorithm.

Breaker protection REQ650 ANSI 1MRK 505 269-BUS -

Product version: 1.1 Issued: April 2011

20 ABB

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