ABB Relion 650 series RET650 User manual

Brand: ABB

Model: Relion 650 series RET650

Type: User manual

Relion

650 series

Transformer protection RET650

Product Guide

Contents

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

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

3. Available functions...............................................7

4. Differential protection.........................................17

5. Current protection..............................................18

6. Voltage protection..............................................19

7. Frequency protection.........................................20

8. Secondary system supervision..........................21

9. Control................................................................21

10. Logic..................................................................22

11. Monitoring.........................................................23

12. Metering............................................................26

13. Human Machine interface.................................26

14. Basic IED functions...........................................27

15. Station communication.....................................28

16. Hardware description........................................29

17. Connection diagrams........................................30

18. Technical data...................................................37

19. Ordering............................................................73

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.

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 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-made 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 setting 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

RET650 provides fast and selective

protection, monitoring and control for two-

and three-winding transformers,

autotransformers, generator-transformer units

and shunt reactors. The transformer IED is

designed to operate correctly over a wide

frequency range in order to accommodate

power system frequency variations during

disturbances and generator start-up and shut-

down.

A very fast differential protection function,

with automatic CT ratio matching and vector

group compensation, makes this IED the

ideal solution even for the most demanding

applications. Since RET650 has very low

requirements on the main CTs, no

interposing CTs are required. The differential

protection function is provided with 2nd

harmonic and wave-block restraint features to

avoid tripping for magnetizing inrush current,

and 5th harmonic restraint to avoid tripping

for overexcitation.

The differential function offers a high

sensitivity for low-level internal faults. The

unique and innovative sensitive differential

protection feature of the RET650 provides the

best possible coverage for winding internal

turn-to-turn faults, based on well-known

theory of symmetrical components .

Low impedance restricted earth-fault

protection function are available as

complimentary sensitive and fast main

protection against winding earth faults. This

function includes a directional zero-sequence

current criterion for additional security.

Tripping from Pressure relief/Buchholz and

temperature devices can be done through the

transformer IED where pulsing, lock-out

contact output and so on, is performed. The

binary inputs are heavily stabilized against

disturbance to prevent incorrect operations at

for example, dc system capacitive discharges

or DC earth faults.

Versatile phase, earth, negative and zero

sequence overcurrent functions, which can be

made directional, provide further alternative

backup protection. Thermal overload with

two time-constants, volts per hertz, over/

under voltage are also available.

A built-in disturbance and event recorders

provide valuable data to the user about status

and operation for post-fault disturbance

analysis.

Breaker failure protection allows high speed

back-up tripping of surrounding breakers.

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

Revision: -

ABB 3

Disturbance recording is available to allow

independent post-fault analysis after primary

disturbances.

Three packages have been defined for the

following applications:

• Two-winding transformer in single

breaker arrangements (A01)

• Three-winding transformer in single

breaker arrangements (A05)

• Tap changer control (A07)

The packages are configured and ready for

direct use. Analog and tripping IO has been

pre-defined for basic use. Other signals need

to be applied as required for each application.

The graphical configuration tool ensures

simple and fast testing and commissioning.

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

4 ABB

T2W PDIF

87T 3Id/I

CC RBRF

50BF 3I> BF

CC RBRF

50BF 3I> BF

OC4 PTOC

50/51 3I>

OC4 PTOC

51/67 3I>

CC RPLD

52PD PD

EF4 PTOC

51N

IN>

CC RPLD

52PD PD

TR PTTR

49 Ith

C MSQI

Meter.

V MMXU

Meter.

C MMXU

Meter.

CV MMXN

Meter.

TCS SCBR

Cond

TCS SCBR

Cond

SPVN ZBAT

Cond

TR8 ATCC

TCM YLTC

UV2 PTUV

27 U<

OV2 PTOV

59 U>

PH PIOC

50 3I>>

TR PTTR

49 Ith

REF PDIF

87N IdN/I

Other configured functions

REF PDIF

87N IdN/I

EF4 PTOC

51N/67N

IN>

DRP RDRE

Mont.

ROV2 PTOV

59N 3U0>

RET650 A01 - 2 Winding Transformer protection 10AI (8I+2U)

20 MVA

110±11*1.5% / 21 kV

105 / 550 A

YNd5

20 kV Bus

110 kV Bus

200/1

600/1

20kV/100V

200/1

600/1

IEC61850

ANSI IEC

Function Enabled

in Settings

IEC61850

ANSI IEC

Function Disabled

in Settings

IEC09000645-2-en.vsd

IEC09000645 V2 EN

Figure 1. A typical protection application for a two-winding transformer in single breaker

arrangement

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 5

RET650 A05 - 3 Winding Transformer protection 20AI 2*(6I+4U)

T3W PDIF

87T 3Id/I

CC RBRF

50BF 3I> BF

CC RBRF

50BF 3I> BF

OC4 PTOC

50/51 3I>

OC4 PTOC

51/67 3I>

CC RPLD

52PD PD

CC RBRF

50BF 3I> BF

CC RPLD

52PD PD

EF4 PTOC

51N

IN>

CC RPLD

52PD PD

TR PTTR

49 Ith

TR PTTR

49 Ith

V MSQI

Meter.

C MSQI

Meter.

V MMXU

Meter.

C MMXU

Meter.

CV MMXN

Meter.

V MSQI

Meter.

C MSQI

Meter.

V MMXU

Meter.

C MMXU

Meter.

CV MMXN

Meter.

TCS SCBR

Cond

TCS SCBR

Cond

TCS SCBR

Cond

SPVN ZBAT

Cond

TR8 ATCC

TCM YLTC

UV2 PTUV

27 U<

OV2 PTOV

59 U>

PH PIOC

50 3I>>

TR PTTR

49 Ith

REF PDIF

87N IdN/I

Other configured functions

REF PDIF

87N IdN/I

REF PDIF

87N IdN/I

OEX PVPH

24 U/f>

OC4 PTOC

51/67 3I>

EF4 PTOC

51N/67N

IN>

EF4 PTOC

51N/67N

IN>

DRP RDRE

Mont.

CV MMXN

Meter.

ROV2 PTOV

59N 3UO>

35 kV Bus

110 kV Bus

10 kV Bus

IEC61850

ANSI IEC

Function Enabled

in Settings

IEC61850

ANSI IEC

Function Disabled

in Settings

Transformer Data:

40/40/15 MVA

110±11*1.5% / 36.75 / 10.5 kV

210/628/825 A

YNyn0d5

110kV/100V

300/1

1000/1

800/1

300/1

10kV/100V

35kV/100V

1000/1

W3 W2

IEC09000646-2-en.vsd

IEC09000646 V2 EN

Figure 2. A typical protection application for a three-winding transformer in single breaker

arrangement

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

6 ABB

RET650 A07 – OLTC Control for 1 or 2 Transformers 10AI (6I+4U)

TR PTTR

49 Ith

EF4 PTOC

50N/51N

IN>

CV MMXN

Meter.

OC4 PTOC

50/51 3I>

ETP MMTR

Meter.

ROV PTOV

59N 3U0>

TRx ATCC

UV2 PTOV

27 U<

OV2 PTOV

59 U>

TR PTTR

49 Ith

EF4 PTOC

50N/51N

IN>

CV MMXN

Meter.

OC4 PTOC

50/51 3I>

ETP MMTR

Meter.

ROV2 PTOV

59N 3Uo>

TR8 ATCC

90 U

UV2 PTUV

27 U<

OV2 PTOV

59 U>

TCM YLTC

TCS SCBR

Cond

TCS SCBR

Cond

SPVN ZBAT

Cond

Other configured functions

DRP RDRE

Mont.

T1 Data:

20 MVA

110±11*1.5% / 21 kV

105 / 550 A

YNd5

=11 %

T2 Data:

20 MVA

110±11*1.5% / 21 kV

105 / 550 A

YNd5

=11 %

20 kV Bus #1 20 kV Bus #2

IEC61850

ANSI IEC

Function Enabled

in Settings

IEC61850

ANSI IEC

Function Disabled

in Settings

600/1

20kV/100V

600/1

20kV/100V

IEC09000647-2-en.vsd

IEC09000647 V2 EN

Figure 3. A typical tap changer control application for one or two transformers

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 7

3. Available functions

Main protection functions

IEC 61850/

Function

block name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

Differential protection

T2WPDIF 87T Transformer differential protection, two

winding

T3WPDIF 87T Transformer differential protection, three

winding

REFPDIF 87N Restricted earth fault protection, low

impedance

2 3

HZPDIF 87 1Ph High impedance differential

protection

2 2

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

8 ABB

Back-up protection functions

IEC 61850/

Function

block

name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

Current protection

PHPIOC 50 Instantaneous phase overcurrent

protection

2 3

OC4PTOC 51/67 Four step directional phase overcurrent

protection

2 3 2

EFPIOC 50N Instantaneous residual overcurrent

protection

2 3

EF4PTOC 51N/

67N

Four step directional residual

overcurrent protection

2 3 2

TRPTTR 49 Thermal overload protection, two time

constants

2 3 2

CCRBRF 50BF Breaker failure protection 2 3

CCRPLD 52PD Pole discordance protection 2 3

GUPPDUP 37 Directional underpower protection 1 1 2

GOPPDOP 32 Directional overpower protection 1 1 2

DNSPTOC 46 Negative sequence based overcurrent

function

1 2

Voltage protection

UV2PTUV 27 Two step undervoltage protection 1 1 2

OV2PTOV 59 Two step overvoltage protection 1 1 2

ROV2PTOV 59N Two step residual overvoltage

protection

1 1 2

OEXPVPH 24 Overexcitation protection 1

Frequency protection

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 9

IEC 61850/

Function

block

name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

SAPTUF 81 Underfrequency function 4 4 4

SAPTOF 81 Overfrequency function 4 4 4

SAPFRC 81 Rate-of-change frequency protection 2 2 4

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

10 ABB

Control and monitoring functions

IEC 61850/

Function block

name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

Control

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

TR8ATCC 90 Automatic voltage control for tap

changer, parallel control

1 1 2

TCMYLTC 84 Tap changer control and

supervision, 6 binary inputs

1 1 2

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

I103POSCMD IED commands with position and

select for IEC60870-5-103

50 50 50

Secondary system supervision

TCSSCBR Breaker close/trip circuit monitoring 3 3 3

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 11

IEC 61850/

Function block

name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

Logic

SMPPTRC 94 Tripping logic 2 3 2

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

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

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

12 ABB

IEC 61850/

Function block

name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

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

MVEXP Measured value expander block 66 66 66

SPVNZBAT Station battery supervision 1 1 1

SSIMG 63 Insulation gas monitoring function 2 2 2

SSIML 71 Insulation liquid monitoring function 2 2 2

SSCBR Circuit breaker condition monitoring 2 3 2

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 earth-fault for

IEC60870-5-103

1 1 1

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 13

IEC 61850/

Function block

name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

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

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

14 ABB

Designed to communicate

IEC 61850/

Function block

name

ANSI Function description Transformer

RET650 (A01)

2W/1CB

RET650 (A05)

3W/1CB

RET650 (A07)

OLTC

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

GOOSEVCTRCONF GOOSE VCTR configuration for

send and receive

1 1 1

VCTRSEND Voltage control sending block for

GOOSE

1 1 1

GOOSEVCTRRCV Voltage control receiving block

for GOOSE

3 3 3

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

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 15

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

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

16 ABB

4. Differential protection

Transformer differential protection

T2WPDIF/T3WPDIF

The Transformer differential protection, two-

winding (T2WPDIF) and Transformer

differential protection, three-winding

(T3WPDIF) are provided with internal CT

ratio matching and vector group

compensation and settable, zero sequence

current elimination.

The function can be provided with two or

three-phase sets of current inputs. All current

inputs are provided with percentage bias

restraint features, making the IED suitable for

two- or three-winding transformer

arrangements.

Two-winding applications

xx05000048.vsd

IEC05000048 V1 EN

two-winding

power

transformer

Three-winding applications

xx05000052.vsd

IEC05000052 V1 EN

three-winding

power

transformer with

all three

windings

connected

xx05000049.vsd

IEC05000049 V1 EN

three-winding

power

transformer with

unconnected

delta tertiary

winding

Figure 4. CT group arrangement for

differential protection and

other protections

The setting facilities cover for applications of

the differential protection to all types of

power transformers and auto-transformers

with or without load tap changer as well as

for shunt reactors or and local feeders within

the station. An adaptive stabilizing feature is

included for heavy through-faults.

Stabilization is included for inrush currents as

well as for overexcitation condition. Adaptive

stabilization is also included for system

recovery inrush and CT saturation for

external faults. A high set unrestrained

differential current protection is included for

a very high speed tripping at a high internal

fault currents.

An innovative sensitive differential protection

feature, based on the theory of symmetrical

components, offers the best possible

coverage for power transformer winding turn-

to-turn faults.

Restricted earth fault protection

REFPDIF

Restricted earth fault protection, low

impedance REFPDIF

Restricted earth-fault protection, low-

impedance function (REFPDIF) can be used

on all directly or low-impedance earthed

windings. The REFPDIF function can provide

higher sensitivity (down to 5%) and higher

speed as it measures each winding

individually and thus does not need inrush

stabilization.

The low-impedance function is a percentage

biased function with an additional zero

sequence current directional comparison

criterion. This gives excellent sensitivity and

stability for through faults. The function

allows use of different CT ratios and

magnetizing characteristics on the phase and

neutral CT cores and mixing with other

functions and protection IEDs on the same

cores.

1Ph High impedance differential

protection HZPDIF

The 1Ph High impedance differential

protection HZPDIF function can be used

when the involved CT cores have the same

turn ratio and similar magnetizing

characteristics. It utilizes an external

summation of the currents in the

interconnected CTs and a series resistor and a

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 17

voltage dependent resistor externally to the

IED.

HZPDIF can be used as high impedance REF

protection.

5. Current protection

Instantaneous phase overcurrent

protection PHPIOC

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.

Four step phase overcurrent

protection OC4PTOC

The four step phase overcurrent protection

function OC4PTOC has an inverse or definite

time delay independent for step 1 and 4

separately. Step 2 and 3 are always definite

time delayed.

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

The Instantaneous residual overcurrent

protection EFPIOC has a low transient

overreach and short tripping times to allow

use for instantaneous earth-fault protection,

with the reach limited to less than typical

eighty percent of the transformer impedance

at minimum source impedance. EFPIOC can

be configured to measure the residual current

from the three-phase current inputs or the

current from a separate current input.

EFPIOC can be blocked by activating the

input BLOCK.

Four step residual overcurrent

protection EF4PTOC

The four step residual overcurrent protection

(EF4PTOC) has a settable inverse or definite

time delay independent for step 1 and 4

separately. Step 2 and 3 are always definite

time delayed.

All IEC and ANSI time delayed characteristics

are available.

The directional function is voltage polarized,

current polarized or dual polarized.

EF4PTOC can be set directional or non-

directional independently for each of the steps.

A second harmonic blocking can be set

individually for each step.

Thermal overload protection, two

time constant TRPTTR

If a power transformer or generator reaches

very high temperatures the equipment might

be damaged. The insulation within the

transformer/generator will have forced

ageing. As a consequence of this the risk of

internal phase-to-phase or phase-to-earth

faults will increase. High temperature will

degrade the quality of the transformer/

generator insulation.

The thermal overload protection estimates

the internal heat content of the transformer/

generator (temperature) continuously. This

estimation is made by using a thermal model

of the transformer/generator with two time

constants, which is based on current

measurement.

Two warning levels are available. This

enables actions in the power system to be

done before dangerous temperatures are

reached. If the temperature continues to

increase to the trip value, the protection

initiates a trip of the protected transformer/

generator.

Breaker failure protection CCRBRF

Breaker failure protection (CCRBRF) ensures

fast back-up tripping of surrounding breakers

in case the own breaker failure to open.

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

18 ABB

CCRBRF can be current based, contact based,

or an adaptive combination of these two

principles.

A current check with extremely short reset

time is used as 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.

Breaker failure protection (CCRBRF) 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 function can be programmed to give

a three-phase re-trip of the own breaker to

avoid unnecessary tripping of surrounding

breakers at an incorrect initiation due to

mistakes during testing.

Pole discordance protection

CCRPLD

Circuit breakers and disconnectors can end

up with the poles in different positions (close-

open), due to electrical or mechanical

failures. This 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 own breaker is tripped to

correct such a situation. If the situation

persists the surrounding breakers should be

tripped to clear the unsymmetrical load

situation.

The pole discordance function operates based

on information from the circuit breaker logic

with additional criteria from unsymmetrical

phase currents when required.

Directional over/underpower

protection GOPPDOP/GUPPDUP

The directional over-/under-power protection

GOPPDOP/GUPPDUP 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

Negative sequence based overcurrent

function (DNSPTOC) is typically used as

sensitive earth-fault protection of power

lines, where incorrect zero sequence

polarization may result from mutual

induction between two or more parallel lines.

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 protects against all unbalanced

faults including phase-to-phase faults. The

minimum start current of the function must

be set to above the normal system unbalance

level in order to avoid unintentional

functioning.

6. Voltage protection

Two step undervoltage protection

UV2PTUV

Undervoltages can occur in the power system

during faults or abnormal conditions. Two

step undervoltage protection (UV2PTUV)

function can be used to open circuit breakers

to prepare for system restoration at power

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

ABB 19

outages or as long-time delayed back-up to

primary protection.

UV2PTUV 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

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 has two voltage steps, where step

1 can be set as inverse or definite time

delayed. Step 2 is always definite time delayed.

OV2PTOV has an extremely high reset ratio

to allow settings close to system service

voltage.

Two step residual overvoltage

protection ROV2PTOV

Residual voltages may occur in the power

system during earth faults.

Two step residual overvoltage protection

ROV2PTOV function calculates the residual

voltage from the three-phase voltage input

transformers or measures it from a single

voltage input transformer fed from an open

delta or neutral point voltage transformer.

ROV2PTOV has two voltage steps, where

step 1 can be set as inverse or definite time

delayed. Step 2 is always definite time delayed.

Overexcitation protection

OEXPVPH

When the laminated core of a power

transformer or generator is subjected to a

magnetic flux density beyond its design

limits, stray flux will flow into non-laminated

components not designed to carry flux and

cause eddy currents to flow. The eddy

currents can cause excessive heating and

severe damage to insulation and adjacent

parts in a relatively short time. The function

has settable inverse operating curves and

independent alarm stages.

7. Frequency protection

Underfrequency protection SAPTUF

Underfrequency occurs as a result of lack of

generation in the network.

Underfrequency protection SAPTUF is used

for load shedding systems, remedial action

schemes, gas turbine startup and so on.

SAPTUF is provided with an undervoltage

blocking.

Overfrequency protection SAPTOF

Overfrequency protection function SAPTOF 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 is used mainly for generation

shedding and remedial action schemes. It is

also used as a frequency stage initiating load

restoring.

SAPTOF is provided with an undervoltage

blocking.

Rate-of-change frequency

protection SAPFRC

Rate-of-change frequency protection function

(SAPFRC) gives an early indication of a main

disturbance in the system. SAPFRC can be

used for generation shedding, load shedding

and remedial action schemes. SAPFRC can

discriminate between positive or negative

change of frequency.

SAPFRC is provided with an undervoltage

blocking.

Transformer protection RET650 1MRK 504 127-BEN -

Product version: 1.1 Issued: February 2011

20 ABB

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ABB Relion 650 series RET650 User manual

ABB Relion 650 series RET650 User manual

ABB Relion 650 series RET650 User manual

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