ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521

Protection Relay

Technical Reference Manual, Standard Configurations

3

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

Issued: 27.6.2001

Version: C/14.08.2002

Checked: ML

Approved: MK

We reserve the right to change data without prior notice.

Contents

1. Safety information ...................................................................11

2. Introduction .............................................................................12

3. Standard configurations .........................................................17

3.1. HW version: Basic .......................................................................17

3.1.1. Standard configuration B01 .............................................17

3.1.1.1. Features .............................................................17

3.1.1.2. Application ..........................................................18

3.1.2. Standard configuration B02 .............................................20

3.1.2.1. Features .............................................................20

3.1.2.2. Application ..........................................................21

3.2. HW version: Medium ...................................................................23

3.2.1. Standard configuration M01 .............................................23

3.2.1.1. Features .............................................................23

3.2.1.2. Application ..........................................................24

3.2.2. Standard configuration M02 .............................................26

3.2.2.1. Features .............................................................26

3.2.2.2. Application ..........................................................27

3.3. HW version: High/Sensors ..........................................................29

3.3.1. Standard configuration H01 (Sensors) .............................29

3.3.1.1. Features .............................................................29

3.3.1.2. Application ..........................................................31

3.3.2. Standard configuration H02 .............................................33

3.3.2.1. Features .............................................................33

3.3.2.2. Application ..........................................................35

3.3.3. Standard configuration H03 .............................................37

3.3.3.1. Features .............................................................37

3.3.3.2. Application ..........................................................39

3.3.4. Standard configuration H04 .............................................41

3.3.4.1. Features .............................................................41

3.3.4.2. Application ..........................................................43

3.3.5. Standard configuration H05 .............................................45

3.3.5.1. Features .............................................................45

3.3.5.2. Application ..........................................................47

3.3.6. Standard configuration H06 .............................................49

3.3.6.1. Features .............................................................49

3.3.6.2. Application ..........................................................51

4. Reading of the overview diagrams of the signal routings ..53

1MRS 751802-MUM

4

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

4.1. Digital inputs ...............................................................................53

4.1.1. Input selectors .................................................................54

4.1.2. Input switchgroups (SWGRP) ..........................................55

4.1.3. Input signals ....................................................................56

4.2. Function blocks in the overview diagrams of the signal routings 56

4.2.1. Function blocks ................................................................57

4.3. Output switchgroups (SWGRP) ..................................................58

4.3.1. Output selectors ..............................................................58

4.4. Other functions described in signal overview diagrams ..............59

4.4.1. Lockout function ..............................................................59

5. Parametrization of the digital inputs .................................... 62

5.1. Selectors .....................................................................................62

5.1.1. Reset ...............................................................................62

5.1.2. Group ...............................................................................62

5.1.3. Blocking ...........................................................................62

5.1.4. Disturbance recorder trigger ............................................62

5.1.5. Power quality trigger ........................................................63

5.1.6. Master trip ........................................................................63

5.1.7. External trip .....................................................................63

5.1.8. Lockout reset ...................................................................63

5.1.9. Local/Remote ..................................................................63

5.1.10.Close enable ....................................................................63

5.1.11.Direct control (Open/Close) .............................................63

5.1.12.Object indication ..............................................................63

5.1.13.Time synchronization .......................................................63

5.1.14.AR inhibit, AR on input, start AR ......................................64

5.1.15.BACTRL (Basic angle control) .........................................64

5.1.16.Logic input 1...3 ...............................................................64

5.2. Interlocking .................................................................................64

5.2.1. Interlocking options ..........................................................64

6. Default settings ...................................................................... 68

7. Function block descriptions ................................................. 74

7.1. Protection ....................................................................................74

7.1.1. 3I>, 3I>> and 3I>>> .........................................................74

7.1.2. Io>, Io>> and Io>>> .........................................................76

7.1.3. Io>->, Io>>-> and Io>>>-> ...............................................78

7.1.4. 3I>-> and 3I>>-> ..............................................................79

7.1.5. 3I2f> .................................................................................84

7.1.6. Iub> ..................................................................................84

7.1.7. 3Ith> .................................................................................85

7.1.8. O->I ..................................................................................86

7.1.9. f1 and f2 ...........................................................................88

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

5

7.1.10.SYNC1 .............................................................................89

7.2. Control .........................................................................................90

7.2.1. I<->O CB1 ........................................................................90

7.2.2. I<->O IND1 and I<->O IND2 ............................................91

7.2.3. I<->O POS .......................................................................91

7.3. Measurement ..............................................................................91

7.3.1. 3I ......................................................................................91

7.3.2. Io ......................................................................................92

7.3.3. Uo ....................................................................................92

7.3.4. DREC ...............................................................................93

7.3.5. 3U ....................................................................................95

7.3.6. f ........................................................................................95

7.3.7. PQE .................................................................................95

7.4. Condition monitoring ...................................................................96

7.4.1. CB wear ...........................................................................96

7.4.2. TCS1 ................................................................................96

7.4.3. MCS 3I .............................................................................97

7.4.4. MCS 3U ...........................................................................97

7.5. Power quality ...............................................................................98

7.5.1. PQ 3Inf .............................................................................98

7.5.2. PQ 3Unf ...........................................................................99

7.6. Standard functions ....................................................................100

7.6.1. Switchgroups .................................................................100

7.6.2. Selectors ........................................................................100

8. Example substations ............................................................101

9. Application examples, Basic ................................................104

9.1. Outgoing feeder, Basic B01 ......................................................104

9.1.1. Features .........................................................................104

9.1.2. Measurement connections .............................................106

9.1.3. Protection .......................................................................106

9.1.3.1. Phase overcurrent protection ...........................106

9.1.3.2. Earth-fault protection ........................................107

9.1.3.3. Phase discontinuity protection .........................108

9.1.3.4. Thermal overload protection ............................108

9.1.4. Connections and signal routings ....................................109

9.1.4.1. Protection signal routing ...................................109

9.1.4.2. Indication and control connections ...................111

9.1.5. Implementations .............................................................113

9.1.5.1. Outgoing blocking signal to the incoming

feeder ...............................................................113

9.1.5.2. Blocking signal received from the residual

voltage relay .....................................................114

6

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

9.1.5.3. Circuit-breaker failure protection ......................114

9.1.5.4. Trip-circuit supervision .....................................115

9.1.5.5. Condition monitoring of the breaker wear ........115

9.1.5.6. Disconnector and earth-switch indication ........115

9.2. Incoming feeder, Basic B01 ......................................................117

9.2.1. Features ........................................................................117

9.2.2. Measurement connections ............................................119

9.2.3. Protection ......................................................................119

9.2.3.1. Phase overcurrent protection ...........................120

9.2.3.2. Earth-fault protection .......................................121

9.2.3.3. Protection signal routing ..................................121

9.2.3.4. Indication and control connections ..................122

9.2.4. Implementations ............................................................122

9.2.4.1. Blocking signal received from the outgoing

feeder ...............................................................122

9.2.4.2. Outgoing blocking signal to the overcurrent

relay on the HV side ........................................122

9.2.4.3. Earth-fault stage Io>>> to trip the breaker on

the HV side of the transformer .........................123

9.2.4.4. Circuit-breaker failure protection ......................123

9.2.4.5. Disturbance recorder .......................................123

9.2.4.6. Power quality ...................................................124

9.3. Transformer feeder, Basic B01 .................................................126

9.3.1. Features ........................................................................126

9.3.2. Measurement connections ............................................129

9.3.3. Protection ......................................................................129

9.3.3.1. Phase overcurrent protection ...........................129

9.3.3.2. Transformer inrush ..........................................130

9.3.3.3. Protection signal routing ..................................131

9.3.3.4. Indication and control connections ..................131

9.3.4. Implementations ............................................................131

9.3.4.1. Blocking signal from the MV relay on

the secondary side of the transformer .............131

9.3.4.2. Circuit-breaker failure protection ......................132

9.3.5. Blocking signal overview ................................................133

9.4. Outgoing feeder, Basic B02 ......................................................135

9.4.1. Features ........................................................................135

9.4.2. Measurement connections ............................................137

9.4.3. Protection ......................................................................137

9.4.3.1. Auto-reclosure function ....................................137

9.4.4. Protection signal routing ................................................140

9.4.5. Indication and control connections ................................140

9.4.6. Implementations ............................................................141

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

7

9.4.6.1. Definite Trip alarm to output relay ....................141

9.4.6.2. Digital input to initiate auto-reclosing function ..142

10.Application examples, Medium ...........................................143

10.1.Outgoing feeder, Medium M01 .................................................143

10.1.1.Features .........................................................................143

10.1.2.Measurement connections .............................................145

10.1.3.Protection .......................................................................145

10.1.3.1.Directional earth-fault protection ......................146

10.1.3.2.Protection signal routing ..................................146

10.1.3.3.Indication and control connections ...................146

10.1.4.Implementations .............................................................147

10.1.4.1.Basic angle control by digital input ...................147

10.1.4.2.Outgoing blocking signal to the incoming

feeder ...............................................................148

10.1.4.3.Trip-alarm signals from overcurrent and

earth-fault .........................................................148

10.1.4.4.Circuit-breaker failure protection ......................148

10.1.4.5.Trip-circuit supervision .....................................149

10.2.Incoming feeder, Medium M01 .................................................150

10.2.1.Features .........................................................................150

10.2.2.Measurement connections .............................................152

10.2.3.Protection .......................................................................152

10.2.3.1.Overcurrent protection .....................................153

10.2.3.2.Residual voltage protection ..............................153

10.2.4.Connections ...................................................................153

10.2.4.1.Protection signal routing ..................................153

10.2.4.2.Indication and control connections ...................153

10.2.5.Implementations .............................................................154

10.2.5.1.Start signal from the second residual voltage

stage to release blocking .................................154

10.2.5.2.Blocking signal received from the outgoing

feeder ...............................................................154

10.2.5.3.Outgoing blocking signal to the overcurrent

relay on the HV side .........................................154

10.2.5.4.Trip signal from second residual voltage stage 155

10.2.5.5.Second settings for residual voltage protection 155

10.2.5.6.Circuit-breaker failure protection ......................155

10.2.5.7.Trip-circuit supervision .....................................156

10.3.Outgoing feeder, Medium M02 .................................................158

10.3.1.Features .........................................................................158

10.3.2.Measurement connections .............................................160

10.3.3.Protection .......................................................................160

8

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

10.3.3.1.Auto-reclosure function ....................................160

10.3.4.Protection signal routing ................................................163

10.3.5.Indication and control connections ................................163

10.3.6.Implementations ............................................................164

10.3.6.1.Definite trip alarm to output relay .....................164

10.3.6.2.Digital input to initiate auto-reclosing function .165

10.3.6.3.Basic angle control by digital input ..................165

11.Application examples, High ................................................ 167

11.1.Incoming feeder, High H01 ......................................................167

11.1.1.Features ........................................................................167

11.1.2.Measurements ...............................................................169

11.1.3.Protection ......................................................................169

11.1.3.1.Overcurrent protection .....................................169

11.1.3.2.Synchro-check function ...................................169

11.1.4.Connections ...................................................................170

11.1.4.1.Protection signal routing ..................................170

11.1.4.2.Indication and control connections ..................170

11.1.5.Implementations ............................................................170

11.1.6.Blocking principles .........................................................170

11.1.6.1.Circuit-breaker failure protection ......................171

11.1.6.2.Trip-circuit supervision .....................................171

11.2.Incoming feeder, High H02 ......................................................172

11.2.1.Features ........................................................................172

11.2.2.Measurement connections ............................................174

11.2.3.Protection ......................................................................174

11.2.3.1.Overcurrent protection .....................................174

11.2.4.Connections ...................................................................175

11.2.4.1.Protection signal routing ..................................175

11.2.4.2.Indication and control connections ..................176

11.2.5.Implementations ............................................................176

11.2.5.1.Blocking signal received from the outgoing

feeder and the bus sectionalizer ......................176

11.2.5.2.Blocking signal from I>-> stage to I>> stage ...177

11.2.5.3.Circuit-breaker failure protection ......................177

11.2.5.4.Trip-circuit supervision .....................................178

11.3.Bus sectionalizer, High H03 .....................................................179

11.3.1.Features ........................................................................179

11.3.2.Measurements ...............................................................181

11.3.3.Protection ......................................................................181

11.3.3.1.Overcurrent protection .....................................181

11.3.3.2.Synchro-check function ...................................182

11.3.4.Connections ...................................................................183

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

9

11.3.4.1.Protection signal routing ..................................183

11.3.4.2.Indication and control connections ...................183

11.4.Outgoing feeder, High H04 .......................................................184

11.4.1.Features .........................................................................184

11.4.2.Measurements ...............................................................186

11.4.3.Measurement connections .............................................186

11.4.4.Protection .......................................................................186

11.4.4.1.Non-directional earth-fault protection ...............186

11.4.4.2.Auto-reclosure function ....................................187

11.4.5.Connections ...................................................................187

11.4.5.1.Protection signal routing ..................................187

11.4.5.2.Indication and control connections ...................187

11.4.6.Implementations .............................................................187

11.5.Incoming feeder, High H05 .......................................................188

11.5.1.Features .........................................................................188

11.5.2.Measurements ...............................................................190

11.5.3.Protection .......................................................................190

11.5.3.1.Phase overcurrent protection ...........................190

11.5.3.2.Earth-fault protection ........................................190

11.5.3.3.Overvoltage and undervoltage protection ........190

11.5.4.Connections ...................................................................191

11.5.4.1.Protection signal routing ..................................191

11.5.4.2.Indication and control connections ...................192

11.5.5.Implementations .............................................................192

11.5.5.1.Blocking signal received from the outgoing

feeder ...............................................................192

11.5.5.2.Outgoing blocking signal to the overcurrent

relay on the HV side .........................................192

11.5.5.3.Earth-fault stage Io>>> to trip the breaker on

the HV side of the transformer .........................192

11.5.5.4.Circuit-breaker failure protection ......................192

11.5.5.5.Disturbance recorder .......................................192

11.5.5.6.Power quality ...................................................193

11.6.Measurement cubicle, High H06 ..............................................194

11.6.1.Features .........................................................................194

11.6.2.Measurements ...............................................................196

11.6.3.Protection .......................................................................196

11.6.3.1.Residual voltage protection ..............................196

11.6.3.2.Overvoltage and undervoltage protection ........196

11.6.3.3.Underfrequency protection ...............................197

11.6.4.Connections ...................................................................197

11.6.4.1.Protection signal routing ..................................197

10

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

11.6.4.2.Indication and control connections ..................198

11.6.5.Implementations ............................................................199

11.6.5.1.Disturbance recorder .......................................199

11.6.5.2.Power quality ...................................................199

12.Symbol notations ................................................................ 201

13.References ........................................................................... 203

5HYLVLRQKLVWRU\

Version C/14.8.2002:

- changes in chapters: “Introduction”, “Local/Remote”, “3I2f>”, “Transformer inrush”, “Default set-

tings”, “3I>, 3I>> and 3I>>>”, “Symbol notations”

- new chapters: “HW version: High”, “3I>-> and 3I>>->”, “3U> and 3U>>”, “3U< and 3U<<”, “Uo>,

Uo>> and Uo>>>”, “f1 and f2”, “SYNC1”, “3U”, “f”, “PQE”, “MCS 3U”, “PQ 3Unf”, “Application

examples: High”

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

11

1. Safety information

Dangerous voltages can occur on the connectors, even though the

auxiliary voltage is disconnected

National and local electrical safety regulations must always be

followed

The device contains components that are sensitive to electrostatic

discharge

The frame of the device has to be carefully earthed

Only a competent electrician is allowed to carry out the electrical

installation

Non-observance can result in death, personal injury or substantial

property damage

Breaking the sealing tape on the rear panel of the device will result in

loss of warranty and a proper operation will no longer be guaranteed

!

12

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

2. Introduction

This document provides descriptions of the standard configurations for

the REX 521. Section 3 describes the features of the different standard

configurations one by one while sections 4 to 6 describe the signal routings and

functionality. Section 8, 9 and 10 present different application examples.

The standard configurations available are presented in the following table. Note that

in the function block descriptions in the CD-ROM Technical Descriptions of

Functions (1MRS 750889-MCD) the FB names are used instead of the IEC names.

Hardware (HW) versions for the REX 521 are basic, medium, high and sensor. The

sensor variant of the standard configuration is indicated as the letter ‘S’ in the

“Config. name” parameter, e.g. H02S.

Differences between the REX 521 and the RED 500 platform in

the function block descriptions

The REX 521 and the RED 500 platform differ in some respects concerning the

function block descriptions in the CD-ROM Technical Descriptions of Functions

(1MRS 750889-MUM). Firstly, there are some terms that refer to other products

than the REX 521. Secondly, there are few characteristics that appear only in the

REX 521:

• Event mask 1 is only for SPA communication.

• The direct control of the auto-reclose function has been disabled.

• Limited number of inputs and outputs are used in standard configurations of the

REX 521.

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

13

Table 2.-1 Standard configurations for the REX 521

HW versions Basic Medium High/Sensor

Standard configurations B01 B02 M01 M02

H01

1

H02 H03 H04 H05 H06

Function

blocks

FB name

IEEE

device

number

Protection

3I>

NOC3Low 51

xxxx xxxxx

3I>>

NOC3High 50/51

xxxx xxxxx

3I>>>

NOC3Inst 50/51

xxxxx xxx

Io>

NEF1Low 51N

xx

x

2

x

Io>>

NEF1High 50N/51N

xx

x

2

x

Io>>>

NEF1Inst 50N

xx

x

2

x

Io>->

4

DEF2Low 67N/51N

xxxxxx

Io>>->

4

DEF2High 67N

xxxxxx

Io>>>->

4

DEF2Inst 67N

xxx xx

3I>->

DOC6Low 67

x

3

3I>>->

DOC6High 67

x

3

3U>

OV3Low 59

xx

3U>>

OV3High 59

xx

3U<

UV3Low 27

xx

3U<<

UV3High 27

xx

3I2f>

Inrush3 68

xxxxxxxxx

Iub>

CUB3Low 46

xxxxxxxx

3Ith>

TOL3Cab 49F

xxxxxxxx

O->I

AR5Func 79

x xxxxx

Uo>

ROV1Low 59N

xx

Uo>>

ROV1High 59N

xx

Uo>>>

ROV1Inst 59N

xx

f1

Freq1St1 81U/81O

x

f2

Freq1St2 81U/81O

x

SYNC1

SCVCSt1 25

xx

Control

I<->O CB1

COCB1

xxxxxxxxxx

I<->O IND1

COIND1

xxxxxxxxxx

I<->O IND2

COIND2

xxxxxxxxxx

I<->O POS

COLOCAT

xxxxxxxxxx

Measurement

3I

MECU3A

xxxxxxxxxx

Io

MECU1A

xxxxxxxxxx

Uo

MEVO1A

xxxxxxxx

DREC

MEDREC

xxxxxxxxxx

3U

MEVO3A

xxxxxx

f

MEFR1

xxxxxx

PQE

MEPE7

xxxxxx

14

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

1

H01 available only with sensor version of the REX 521

2

Configured fixedly to the I

0

(1/5 A) channel

3

3I>-> and 3I>>-> cannot be set to operate as 3I>, 3I>> or 3I>>>

4 Can be used as Io>, Io>> and Io>>> or Uo>, Uo>> and Uo>>> function block with some limitations

Condition

monitoring

CB wear

CMBWEAR1

xxxxxxxxxx

TCS1

CMTCS1

xxxxxxxxxx

MCS 3I

CMCU3

xxxxxxxxxx

MCS 3U

CMVO3

xxxxxx

Power quality

monitoring

PQ 3Inf

PQCU3H

xxxxxxxxxx

PQ 3Unf

PQVO3H

xxxxx

Table 2.-1 Standard configurations for the REX 521

HW versions Basic Medium High/Sensor

Standard configurations B01 B02 M01 M02

H01

1

H02 H03 H04 H05 H06

Function

blocks

FB name

IEEE

device

number

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

15

Table 2.-2 Protection functions available in the different standard

configurations of the REX 521

Function Description

3I> Three-phase non-directional overcurrent protection, low-set stage

3I>> Three-phase non-directional overcurrent protection, high-set stage

3I>>> Three-phase non-directional overcurrent protection, instantaneous stage

Io> Non-directional earth-fault protection, low-set stage

Io>> Non-directional earth-fault protection, high-set stage

Io>>> Non-directional earth-fault protection, instantaneous stage

Io>-> Directional earth-fault protection, low-set stage

Io>>-> Directional earth-fault protection, high-set stage

Io>>>-> Directional earth-fault protection, instantaneous stage

3I>-> Three-phase directional overcurrent protection, low-set stage

3I>>-> Three-phase directional overcurrent protection, high-set stage

3U> Three-phase overvoltage protection, low-set stage

3U>> Three-phase overvoltage protection, high-set stage

3U< Three-phase undervoltage protection, low-set stage

3U<< Three-phase undervoltage protection, high-set stage

3I2f> Three-phase transformer inrush and motor start-up current detector

Iub> Phase discontinuity protection

3Ith> Three-phase thermal protection for cables

O->I Auto-reclose function (5 shots)

Uo> Residual overvoltage protection, low-set stage

Uo>> Residual overvoltage protection, high-set stage

Uo>>> Residual overvoltage protection, instantaneous stage

f1 Underfrequency or overfrequency protection, stage 1

f2 Underfrequency or overfrequency protection, stage 2

SYNC Synchro-check / voltage-check function

Table 2.-3 Control functions available in the different standard configurations

of the REX 521

Function Description

I<->O CB1 Circuit breaker control with indication

I<->O IND1 Object indication

I<->O IND2 Object indication

I<->O POS Logic control position selector

Table 2.-4 Measurement functions available in the different standard

configurations of the REX 521

Function Description

3I Three-phase current measurement

Io Neutral current measurement

Uo Residual voltage measurement

DREC Transient disturbance recorder

3U Three-phase voltage measurement

16

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

f System frequency measurement

PQE Three-phase power and energy measurement

Table 2.-5 Condition monitoring functions available in the different standard

configurations of the REX 521

Function Description

CB wear Circuit breaker electric wear 1

TCS1 Trip-circuit supervision 1

MCS 3I Supervision function of the energizing current input circuit

MCS 3U Supervision function of the energizing voltage input circuit

Table 2.-6 Power quality monitoring function available in the different

standard configurations of the REX 521

Function Description

PQ 3Inf Current waveform distortion measurement

PQ 3Unf Voltage waveform distortion measurement

Table 2.-4 Measurement functions available in the different standard

configurations of the REX 521

Function Description

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

17

3. Standard configurations

3.1. HW version: Basic

3.1.1. Standard configuration B01

3.1.1.1. Features

• Three-phase non-directional overcurrent protection with three stages

• Non-directional earth-fault protection with three stages

• Phase discontinuity protection for three phases

• Three-phase thermal protection for cables

• Three-phase transformer inrush and motor start-up current detector

• Supervision function for the energizing current input circuit

• Current waveform distortion measurement

• Three-phase current measurement

• Neutral current measurement

• Calculation of the accumulated electric breaker wear of the circuit breaker (CB)

• Transient disturbance recorder

• Trip-circuit supervision

• Delayed trip output for the circuit-breaker failure protection (CBFP) function

• Circuit breaker control with indication

• Lockout function

• Object indication

• Logic control position selector

• User-configurable I/Os

• Interlocking

For more information about the features, please refer to chapter “Function block

descriptions” on page 74.

18

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

)LJ %ORFNGLDJUDPRI%

3.1.1.2. Application

This standard configuration for the REX 521 is designed to be used in single busbar

systems using one circuit breaker for selective short-circuit, time overcurrent and

earth-fault protection of radial isolated neutral networks, solidly earthed networks,

resistant earthed networks and resonant earthed networks.

For more detailed information, please refer to the application examples of B01 on

pages 104, 117 and 126.

49F

3

3I > 50/51

I >

0

50N/51N

3I >

2f

68

I >

46

CBFP

62

TCS

CBCM

0

I

MCS

3I~harm

000

R

3I

I

0

REX 521 B01

LO

86

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

19

)LJ %ORFNGLDJUDPRIWKHVWDQGDUGFRQILJXUDWLRQ%IRUWKH5(;

3I>

BS1

BS2

GROUP

RESET

CBFP

START

TRIP

CBFP

3I>>>

CBFP

BS1

BS2

GROUP

DOUBLE

RESET

BSOUT

START

TRIP

CBFP

Io>

CBFP

BS1

BS2

GROUP

RESET

START

TRIP

CBFP

Io>>

CBFP

BS1

BS2

GROUP

RESET

START

TRIP

CBFP

Io>>>

CBFP

BS1

BS2

GROUP

RESET

START

TRIP

CBFP

GROUP

START

3I

2f

/I

1f

>

3dI/dt>

3I2f>

BS1

BS2

GROUP

RESET

START

TRIP

CBFP

Iub>

CBFP

3∆I>

BLOCK (BS)

GROUP

RESET

START

TRIP

CBFP

CU_ALARM

3Ith>

CBFP

3

ϑ>

Cab

I<->Ο CB1

OPEN

CLOSE

CLOSEENA

BINOPEN

BINCLOSE

OOPEN

OCLOSE

AOPEN

ACLOSE

3I

IL1

IL2

IL3

Io

OPEN

BINOPEN

BINCLOSE

ALARM

CB wear

TCSSTATE

BS

ALARM

TCS1

ALARM

MCS 3I

TRIGG

RESET

HAR_HIGH

CUM_HIGH

PQ 3Inf

3I>>

CBFP

BS1

BS2

GROUP

DOUBLE

RESET

BSOUT

START

TRIP

CBFP

I<->O IND1

BINOPEN

BINCLOSE

I<->O IND2

BINOPEN

BINCLOSE

I<->O POS

BINREMOTE

ConfB01

PO1

(X4.1.12/13)

PO2

(X4.1.14/15)

PO3

(X4.1.17/18)

SO1

(X4.1.8/7/6)

SO2

(X4.1.10/11/9)

3I>

3I>>

3I>>>

Io>

Io>>

Io>>>

Iub>

3Ith>

1

Lockout

HSPO1

Lockout reset

S

Q

R

Lockout Working

HSPO1

≥1

Master Trip

Open

Output SWGRP’s Output signals

Output relays

(X4.2.3/4/1/2)

Trip 1

≥1

3I>

3I>>

3I>>>

Io>

Io>>

Io>>>

Iub>

3Ith>

Trip 2

3I>

3I>>

3I>>>

Io>

Io>>

Io>>>

Iub>

3Ith>

Trip 3

3I>

3I>>

3I>>>

Io>

Io>>

Io>>>

Iub>

3Ith>

Start 1

3I>

3I>>

3I>>>

Io>

Io>>

Io>>>

Iub>

3Ith>

Start 2

3I>>

3I>>>

BSOUT

Alarm 1

I<->0 CB1 open

I<->0 CB1 close

3Ith>

3I MCS

TCS

PQ 3Inf har

PQ 3Inf cum

CB wear

Lockout

Close

3I>

3I>>

3I>>>

Io>

Io>>

Io>>>

Iub>

3Ith>

CBFP

3I>>

3I>>>

Double

Function blocks

I<->O CB1

Interlocking_A

Interlocking_B

Interlocking_C

Interlocking_D

Interlocking_E

CLOSEENA

&

Interlocking

scheme

I<->O CB1

Lockout Working

Close

Close enable

CB pos. open

CB pos. close

Open

DC pos. open

DC pos. close

ES pos. open

ES pos. close

Logic input 1

Logic input 2

Logic input 3

Selector

I<->O IND1

DC1

DC2

I<->O IND2

ES1

ES2

DC2

ES2

DC1

ES1

CBO

TCS BS

SWGRP

CBO

Input SWGRP’sInput signals

Digital

inputs

DI1

DI2

DI3

DI4

DI5

DI6

DI7

DI8

DI9

X4.2.5/6

X4.2.6/7

X4.2.8/9

X4.2.9/10

X4.2.11/12

X4.2.13/14

X4.2.15/16

X4.2.17/18

X3.1.1/2

Terminal

connection

O/C

E/F

Iub>

3Ith>

PQ 3Inf

BS2 3I>

BS2 3I>>

BS2 3I>>>

BS2 Io>

BS2 Io>>

BS2 Io>>>

BS2 Iub>

BS 3Ith>

Blocking 2

DREC trig

Master trip

Lockout reset

PQ 3Inf trig

O/C

E/F

Iub>

3Ith>

PQ 3Inf

O/C

E/F

Iub>

3Ith>

Reset 2

SWGRP

Reset 1

Group

Remote

BS1 3I>

BS1 3I>>

BS1 3I>>>

BS1 Io>

BS1 Io>>

BS1 Io>>>

BS1 Iub>

Blocking 1

DREC

IL1

IL2

IL3

Io

Uo

BI1

BI2

BI3

BI4

BI5

BI6

BI7

BI8

BI9

BI10

BI11

BI12

BI13

BI14

BI15

BI16

EXT_TRG

Start 3I>

Start 3I>>

Start 3I>>>

Start Io>

Start Io>>

Start Io>>>

Start 3Iub>

Start 3Ith>

Trip 3I>

Trip 3I>>

Trip 3I>>>

Trip Io>

Trip Io>>

Trip Io>>>

Trip 3Iub>

Trip 3Ith>

I<->0 CB1 open

I<->0 CB1 close

3Ith>

3I MCS

TCS

PQ 3Inf har

PQ 3Inf cum

CB wear

Alarm 2

I<->0 POS

External trip

20

1MRS 751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

3.1.2. Standard configuration B02

3.1.2.1. Features

• Three-phase non-directional overcurrent protection with three stages

• Three-phase transformer inrush and motor start-up current detector

• Non-directional earth-fault protection with three stages

• Phase discontinuity protection for three phases

• Three-phase thermal protection for cables

• Supervision function for the energizing current input circuit

• Current waveform distortion measurement

• Three-phase current measurement

• Neutral current measurement

• Calculation of the accumulated electric breaker wear of the circuit breaker (CB)

• Transient disturbance recorder

• Trip-circuit supervision

• Delayed trip output for the circuit-breaker failure protection (CBFP) function

• Automatic reclosing 1...5 shots

• Circuit breaker control with indication

• Lockout function

• Object indication

• Logic control position selector

• User-configurable I/Os

• Interlocking

)LJ %ORFNGLDJUDPRIWKHVWDQGDUGFRQILJXUDWLRQ%

49F

3

3I > 50/51

I >

0

50N/51N

3I >

2f

68

I >

46

0

I

79

CBFP

62

TCS

CBCM

3I

I

0

I

MCS

3I~harm

000

R

REX 521 B02

LO

86

Page is loading ...

ABB REX 521 Technical Reference Manual, Standard Configurations

ABB REX 521 Technical Reference Manual, Standard Configurations

Related papers

Other documents