ABB REX 521 Technical Reference Manual, Standard Configurations

Protection Relay

REX 521

Technical Reference Manual, Standard Configurations

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

1MRS751802-MUM

Issued: 27.06.2001

Version: G/29.04.2005

Contents

1. About this manual ...................................................................13

1.1. Copyrights ...................................................................................13

1.2. Trademarks .................................................................................13

1.3. General .......................................................................................13

1.4. Abbreviations ..............................................................................14

1.5. Related documents .....................................................................14

1.6. Document revisions .....................................................................15

1.7. Safety information .......................................................................16

2. Introduction .............................................................................17

3. Standard configurations .........................................................23

3.1. HW version: Basic .......................................................................23

3.1.1. Standard configuration B01 .............................................23

3.1.1.1. Features .............................................................23

3.1.1.2. Application ..........................................................24

3.1.2. Standard configuration B02 .............................................26

3.1.2.1. Features .............................................................26

3.1.2.2. Application ..........................................................27

3.2. HW version: Medium ...................................................................29

3.2.1. Standard configuration M01 .............................................29

3.2.1.1. Features .............................................................29

3.2.1.2. Application ..........................................................30

3.2.2. Standard configuration M02 .............................................32

3.2.2.1. Features .............................................................32

3.2.2.2. Application ..........................................................33

3.3. HW version: High/Sensor ............................................................35

3.3.1. Standard configuration H01 (Sensor) ..............................35

3.3.1.1. Features .............................................................35

3.3.1.2. Application ..........................................................36

3.3.2. Standard configuration H02 .............................................38

3.3.2.1. Features .............................................................38

3.3.2.2. Application ..........................................................39

3.3.3. Standard configuration H03 .............................................41

3.3.3.1. Features .............................................................41

3.3.3.2. Application ..........................................................42

3.3.4. Standard configuration H04 .............................................44

3.3.4.1. Features .............................................................44

3.3.4.2. Application ..........................................................45

3.3.5. Standard configuration H05 .............................................47

3.3.5.1. Features .............................................................47

3.3.5.2. Application ..........................................................48

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3.3.6. Standard configuration H06 .............................................50

3.3.6.1. Features .............................................................50

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

3.3.7. Standard configuration H07 .............................................53

3.3.7.1. Features .............................................................53

3.3.7.2. Application .........................................................54

3.3.8. Standard configuration H08 (No sensors) .......................56

3.3.8.1. Features .............................................................56

3.3.8.2. Application .........................................................57

3.3.9. Standard configuration H09 (No sensors) .......................59

3.3.9.1. Features .............................................................59

3.3.9.2. Application .........................................................60

4. Reading of the overview diagrams of the signal routings . 63

4.1. Digital inputs ...............................................................................63

4.1.1. Input selectors .................................................................64

4.1.2. Input switchgroups (SWGRP) ..........................................65

4.1.3. Input signals ....................................................................66

4.2. Function blocks in the overview diagrams of the signal routings 67

4.2.1. Function blocks ................................................................67

4.3. Output switchgroups (SWGRP) ..................................................68

4.3.1. Output selectors ..............................................................68

4.4. Other functions described in signal overview diagrams ..............69

4.4.1. Lockout function ..............................................................69

5. Parametrization of the digital inputs .................................... 73

5.1. Selectors .....................................................................................73

5.1.1. Reset ...............................................................................73

5.1.2. Group ...............................................................................73

5.1.3. Blocking ...........................................................................73

5.1.4. Disturbance recorder trigger ............................................73

5.1.5. Power quality trigger ........................................................74

5.1.6. Master trip ........................................................................74

5.1.7. External trip .....................................................................74

5.1.8. Lockout reset ...................................................................74

5.1.9. Local/Remote ..................................................................74

5.1.10.Close enable ....................................................................74

5.1.11.Direct control (Open/Close) .............................................74

5.1.12.Object indication ..............................................................74

5.1.13.Time synchronization .......................................................75

5.1.14.AR inhibit, AR on input, start AR ......................................75

5.1.15.BACTRL (Basic angle control) .........................................75

5.1.16.Logic input 1...3 ...............................................................75

5.2. Interlocking .................................................................................75

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5.2.1. Interlocking options ..........................................................75

6. Default settings .......................................................................79

7. Function block descriptions ..................................................87

7.1. Protection ....................................................................................87

7.1.1. 3I>, 3I>> and 3I>>> .........................................................87

7.1.2. Io>, Io>> and Io>>> .........................................................89

7.1.3. Io>->, Io>>-> and Io>>>-> ................................................90

7.1.4. 3I>-> and 3I>>-> ..............................................................93

7.1.5. 3U> and 3U>> ..................................................................94

7.1.6. 3U< and 3U<< ..................................................................96

7.1.7. 3I2f> .................................................................................97

7.1.8. Iub> ..................................................................................98

7.1.9. 3Ith> .................................................................................98

7.1.10.O->I ..................................................................................99

7.1.11.Uo>, Uo>> and Uo>>> ...................................................101

7.1.12.f1 and f2 .........................................................................102

7.1.13.SYNC1 ...........................................................................103

7.1.14.Is2t n< ............................................................................104

7.1.15.3I() ..................................................................................105

7.1.16.I2> and I2>> ...................................................................106

7.1.17.3I< ..................................................................................107

7.1.18.FUSEF ...........................................................................108

7.1.19.3Ithdev> .........................................................................109

7.1.20.U1<U1U2> .....................................................................110

7.2. Control .......................................................................................111

7.2.1. I<->O CB1 ......................................................................111

7.2.2. I<->O IND1 and I<->O IND2 ..........................................112

7.2.3. I<->O POS .....................................................................112

7.2.4. I<->O IND3 .....................................................................112

7.2.5. ALARM1-8 .....................................................................112

7.3. Measurement ............................................................................115

7.3.1. 3I ....................................................................................115

7.3.2. Io ....................................................................................116

7.3.3. Uo ..................................................................................116

7.3.4. DREC .............................................................................116

7.3.5. 3U ..................................................................................119

7.3.6. 3U_B ..............................................................................120

7.3.7. f ......................................................................................121

7.3.8. PQE ...............................................................................121

7.3.9. AI1 ..................................................................................122

7.4. Condition monitoring .................................................................122

7.4.1. CB wear .........................................................................122

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7.4.2. TCS1 .............................................................................123

7.4.3. MCS 3I ...........................................................................123

7.4.4. MCS 3U .........................................................................123

7.4.5. TIME1 ............................................................................124

7.5. Power quality ............................................................................124

7.5.1. PQ 3Inf ..........................................................................124

7.5.2. PQ 3Unf .........................................................................125

7.6. Standard functions ....................................................................127

7.6.1. Switchgroups (SWGRP) ................................................127

7.6.2. Selectors ........................................................................127

8. Example substations ........................................................... 129

9. Application examples, Basic ............................................... 133

9.1. Outgoing feeder, Basic B01 ......................................................133

9.1.1. Features ........................................................................133

9.1.2. Measurement connections ............................................135

9.1.3. Protection ......................................................................135

9.1.3.1. Phase overcurrent protection ...........................135

9.1.3.2. Earth fault protection ........................................136

9.1.3.3. Phase discontinuity protection .........................137

9.1.3.4. Thermal overload protection ............................137

9.1.4. Connections and signal routings ...................................138

9.1.4.1. Protection signal routing ..................................138

9.1.4.2. Indication and control connections ..................140

9.1.5. Implementations ............................................................142

9.1.5.1. Outgoing blocking signal to the incoming

feeder ...............................................................143

9.1.5.2. Blocking signal received from the residual

voltage relay ....................................................143

9.1.5.3. Circuit-breaker failure protection ......................143

9.1.5.4. Trip-circuit supervision .....................................144

9.1.5.5. Condition monitoring of the breaker wear ........144

9.1.5.6. Disconnector and earth-switch indication ........145

9.2. Incoming feeder, Basic B01 ......................................................146

9.2.1. Features ........................................................................146

9.2.2. Measurement connections ............................................149

9.2.3. Protection ......................................................................149

9.2.3.1. Phase overcurrent protection ...........................150

9.2.3.2. Earth fault protection ........................................151

9.2.3.3. Protection signal routing ..................................151

9.2.3.4. Indication and control connections ..................152

9.2.4. Implementations ............................................................152

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9.2.4.1. Blocking signal received from the outgoing

feeder ...............................................................152

9.2.4.2. Outgoing blocking signal to the overcurrent

relay on the HV side .........................................152

9.2.4.3. Earth fault stage Io>>> used to trip the breaker

on the HV side of the transformer ....................153

9.2.4.4. Circuit-breaker failure protection ......................153

9.2.4.5. Disturbance recorder ........................................153

9.2.4.6. Power quality ....................................................154

9.3. Transformer feeder, Basic B01 .................................................155

9.3.1. Features .........................................................................155

9.3.2. Measurement connections .............................................158

9.3.3. Protection .......................................................................158

9.3.3.1. Phase overcurrent protection ...........................158

9.3.3.2. Transformer inrush ...........................................159

9.3.3.3. Protection signal routing ...................................160

9.3.3.4. Indication and control connections ...................160

9.3.4. Implementations .............................................................160

9.3.4.1. Blocking signal from the MV relay on the

secondary side of the transformer ....................160

9.3.4.2. Circuit-breaker failure protection ......................161

9.3.5. Blocking signal overview ................................................162

9.4. Outgoing feeder, Basic B02 ......................................................163

9.4.1. Features .........................................................................163

9.4.2. Measurement connections .............................................166

9.4.3. Protection .......................................................................166

9.4.3.1. Auto-reclosure function ....................................167

9.4.4. Protection signal routing ................................................169

9.4.5. Indication and control connections .................................169

9.4.6. Implementations .............................................................170

9.4.6.1. Definite Trip alarm to output relay ....................170

9.4.6.2. Digital input to initiate auto-reclosing function ..171

10.Application examples, Medium ...........................................173

10.1.Outgoing feeder, Medium M01 .................................................173

10.1.1.Features .........................................................................173

10.1.2.Measurement connections .............................................175

10.1.3.Protection .......................................................................175

10.1.3.1.Directional earth fault protection ......................176

10.1.3.2.Protection signal routing ..................................176

10.1.3.3.Indication and control connections ...................176

10.1.4.Implementations .............................................................177

10.1.4.1.Basic angle control by digital input ...................177

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10.1.4.2.Outgoing blocking signal to the incoming

feeder ...............................................................178

10.1.4.3.Trip-alarm signals from overcurrent and

earth fault .........................................................178

10.1.4.4.Circuit-breaker failure protection ......................178

10.1.4.5.Trip-circuit supervision .....................................179

10.2.Incoming feeder, Medium M01 .................................................180

10.2.1.Features ........................................................................180

10.2.2.Measurement connections ............................................183

10.2.3.Protection ......................................................................184

10.2.3.1.Overcurrent protection .....................................184

10.2.3.2.Residual voltage protection .............................184

10.2.4.Connections ...................................................................184

10.2.4.1.Protection signal routing ..................................184

10.2.4.2.Indication and control connections ..................185

10.2.5.Implementations ............................................................185

10.2.5.1.Start signal from the second residual voltage

stage to release blocking .................................185

10.2.5.2.Blocking signal received from the outgoing

feeder ...............................................................185

10.2.5.3.Outgoing blocking signal to the overcurrent

relay on the HV side ........................................186

10.2.5.4.Trip signal from second residual voltage stage 186

10.2.5.5.Second settings for residual voltage protection 186

10.2.5.6.Circuit-breaker failure protection ......................187

10.2.5.7.Trip-circuit supervision .....................................187

10.3.Outgoing feeder, Medium M02 .................................................188

10.3.1.Features ........................................................................188

10.3.2.Measurement connections ............................................191

10.3.3.Protection ......................................................................191

10.3.3.1.Auto-reclosure function ....................................191

10.3.4.Protection signal routing ................................................194

10.3.5.Indication and control connections ................................194

10.3.6.Implementations ............................................................195

10.3.6.1.Definite trip alarm to output relay .....................195

10.3.6.2.Digital input to initiate auto-reclosing function .196

10.3.6.3.Basic angle control by digital input ..................196

11.Application examples, High ................................................ 199

11.1.Incoming feeder, High H01 ......................................................199

11.1.1.Features ........................................................................199

11.1.2.Measurements ...............................................................201

11.1.3.Protection ......................................................................201

11.1.3.1.Overcurrent protection .....................................201

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11.1.3.2.Synchro-check function ....................................201

11.1.4.Connections ...................................................................202

11.1.4.1.Protection signal routing ..................................202

11.1.4.2.Indication and control connections ...................202

11.1.5.Implementations .............................................................202

11.1.6.Blocking principles .........................................................203

11.1.6.1.Circuit-breaker failure protection ......................203

11.1.6.2.Trip-circuit supervision .....................................203

11.2.Incoming feeder, High H02 .......................................................204

11.2.1.Features .........................................................................204

11.2.2.Measurement connections .............................................206

11.2.3.Protection .......................................................................206

11.2.3.1.Overcurrent protection .....................................206

11.2.4.Connections ...................................................................207

11.2.4.1.Protection signal routing ..................................207

11.2.4.2.Indication and control connections ...................208

11.2.5.Implementations .............................................................208

11.2.5.1.Blocking signal received from the outgoing

feeder and the bus sectionalizer ......................208

11.2.5.2.Blocking signal from 3I>-> stage to 3I>> stage 209

11.2.5.3.Circuit-breaker failure protection ......................209

11.2.5.4.Trip-circuit supervision .....................................210

11.3.Bus sectionalizer, High H03 .....................................................210

11.3.1.Features .........................................................................210

11.3.2.Measurements ...............................................................213

11.3.3.Protection .......................................................................213

11.3.3.1.Overcurrent protection .....................................213

11.3.3.2.Synchro-check function ....................................214

11.3.4.Connections ...................................................................215

11.3.4.1.Protection signal routing ..................................215

11.3.4.2.Indication and control connections ...................215

11.4.Outgoing feeder, High H04 .......................................................215

11.4.1.Features .........................................................................215

11.4.2.Measurements ...............................................................218

11.4.3.Measurement connections .............................................218

11.4.4.Protection .......................................................................218

11.4.4.1.Non-directional earth fault protection ...............218

11.4.4.2.Auto-reclosure function ....................................219

11.4.5.Connections ...................................................................219

11.4.5.1.Protection signal routing ..................................219

11.4.5.2.Indication and control connections ...................219

11.4.6.Implementations .............................................................220

11.5.Incoming feeder, High H05 .......................................................220

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11.5.1.Features ........................................................................220

11.5.2.Measurements ...............................................................222

11.5.3.Protection ......................................................................222

11.5.3.1.Phase overcurrent protection ..........................222

11.5.3.2.Earth fault protection .......................................222

11.5.3.3.Overvoltage and undervoltage protection ........222

11.5.4.Connections ...................................................................223

11.5.4.1.Protection signal routing ..................................223

11.5.4.2.Indication and control connections ..................224

11.5.5.Implementations ............................................................224

11.5.5.1.Blocking signal received from the outgoing

feeder ...............................................................224

11.5.5.2.Outgoing blocking signal to the overcurrent

relay on the HV side ........................................224

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

the HV side of the transformer .........................224

11.5.5.4.Circuit-breaker failure protection ......................224

11.5.5.5.Disturbance recorder .......................................224

11.5.5.6.Power quality ...................................................225

11.6.Measurement cubicle, High H06 ..............................................226

11.6.1.Features ........................................................................226

11.6.2.Measurements ...............................................................228

11.6.3.Protection ......................................................................228

11.6.3.1.Residual voltage protection .............................228

11.6.3.2.Overvoltage and undervoltage protection ........228

11.6.3.3.Underfrequency protection ..............................229

11.6.4.Connections ...................................................................229

11.6.4.1.Protection signal routing ..................................229

11.6.4.2.Indication and control connections ..................230

11.6.5.Implementations ............................................................231

11.6.5.1.Disturbance recorder .......................................231

11.6.5.2.Power quality ...................................................231

11.7.Motor protection, High H07 ......................................................232

11.7.1.Features ........................................................................232

11.7.2.Measurements ...............................................................235

11.7.3.Protection ......................................................................235

11.7.3.1.Thermal overload protection ............................235

11.7.3.2.Start-up supervision (stall protection) ..............236

11.7.3.3.Cumulative start-up counter .............................236

11.7.3.4.Short-circuit (high-set overcurrent) protection .238

11.7.3.5.Unbalance protection .......................................238

11.7.3.6.Phase reversal protection ................................239

11.7.3.7.Undercurrent protection ...................................239

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11.7.3.8.Fuse fail protection ...........................................239

11.7.4.Condition monitoring ......................................................239

11.7.4.1.Operation time counter ....................................239

11.7.5.Connections ...................................................................240

11.7.5.1.Protection signal routing ..................................240

11.7.5.2.Indication and control connections ...................240

11.7.5.3.Indication of motor status .................................240

11.8.Incoming feeder, High H08/H09 ...............................................241

11.8.1.Features .........................................................................241

11.8.2.Measurements ...............................................................243

11.8.3.Protection .......................................................................243

11.8.3.1.Phase overcurrent protection ...........................243

11.8.3.2.Earth fault protection ........................................243

11.8.3.3.Overvoltage and undervoltage protection ........243

11.8.4.Connections ...................................................................244

11.8.4.1.Protection signal routing ..................................244

11.8.4.2.Indication and control connections ...................245

11.8.5.Implementations .............................................................245

11.8.5.1.Blocking signal received from the outgoing

feeder ...............................................................245

11.8.5.2.Outgoing blocking signal to the overcurrent

relay on the HV side .........................................245

11.8.5.3.Earth fault stage Io>>> to trip the breaker on

the HV side of the transformer .........................245

11.8.5.4.Circuit-breaker failure protection ......................245

11.8.5.5.Disturbance recorder .......................................245

11.8.5.6.Power quality ...................................................246

12.Symbol notations .................................................................247

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1. About this manual

1.1. Copyrights

The information in this document is subject to change without notice and should not

be construed as a commitment by ABB Oy. ABB Oy assumes no responsibility for

any errors that may appear in this document.

In no event shall ABB Oy be liable for direct, indirect, special, incidental or

consequential damages of any nature or kind arising from the use of this document,

nor shall ABB Oy be liable for incidental or consequential damages arising from

use of any software or hardware described in this document.

This document and parts thereof must not be reproduced or copied without written

permission from ABB Oy, and the contents thereof must not be imparted to a third

party nor used for any unauthorized purpose.

The software or hardware described in this document is furnished under a license

and may be used, copied, or disclosed only in accordance with the terms of such

license.

1.2. Trademarks

ABB is a registered trademark of ABB Group.

All other brand or product names mentioned in this document may be trademarks or

registered trademarks of their respective holders.

1.3. General

This document provides detailed information about the separate functions of the

protection relay REX 521 Revision E.

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REX 521

1.4. Abbreviations

1.5. Related documents

Manuals for REX 521

ASCII American Standard Code for Information Interchange

CB Cicuit Breaker

CBFP Circuit-breaker Failure Protection function

CRC Cyclic Redundancy Check

CT Current transformer

DC Disconnector

DI Digital input

ES Earth switch

HMI Human-machine interface

HSPO High-speed power output

IDMT Inverse Definite Minimum Time

IRF Internal relay fault

LCD Liquid crystal display

LED Light-emitting Diode

MCB Miniature Circuit Breaker

MMI Man-machine interface

NC Normally closed

NO Normally open

NPS Negative Phase Sequence

PO Power output

RS Rogowski sensor

RTC Real-time clock

RTU Remote Terminal Unit

SA Substation automation

SO Signalling output

TCS Trip-circuit supervision

VD Voltage divider

VT Voltage transformer

• Technical Reference Manual, General 1MRS751108-MUM

• Operator’s Manual 1MRS751107-MUM

• Installation Manual 1MRS750526-MUM

• Technical Descriptions of Functions (CD-ROM) 1MRS750889-MCD

• Modbus Remote Communication Protocol for REX 521,

Technical Description

1MRS755017

• DNP 3.0 Remote Communication Protocol for REF 54_

and REX 521, Technical Description

1MRS755260

1MRS751802-MUM

REX 521

15

Protection Relay

Technical Reference Manual, Standard Configurations

Parameter and event lists for REX 521

Tool-specific manuals

1.6. Document revisions

• Parameter List for REX 521 1MRS751999-RTI

• Event List for REX 521 1MRS752000-RTI

• General Parameters for REX 521 1MRS752156-RTI

• Interoperability List for REX 521 1MRS752157-RTI

• CAP 505 Installation and Commissioning Manual 1MRS751901-MEN

• CAP 505 User’s Guide 1MRS752292-MUM

• CAP 505 Protocol Mapping Tool, Operation Manual 1MRS755277

• LIB, CAP, SMS ,Tools for Relays and Terminals,

User’s Guide

1MRS752008-MUM

• CAP 501 Installation and Commissioning Manual 1MRS751899-MEN

• CAP 501 User’s Guide 1MRS751900-MUM

Version Date History

F 22.6.2004 - New configuration, H08, Section 3.3.8. Standard configuration H08

(No sensors).

- Configuration H08 added to Table 2.-1, Table 6.-1, Table 6.-3 and

Table 6.-5.

- Text added to Section 5.1.11. Direct control (Open/Close), Section

7.3.3. Uo and Section 7.3.5. 3U.

- New function, 3U_B, Section 7.3.6. 3U_B.

- New table, Table 7.2.5-12.

- Function 3U_B added to Table 2.-4.

- Changes in Fig. 3.1.1.2.-1, Fig. 3.1.2.2.-1, Fig. 3.2.1.2.-1, Fig.

3.2.2.2.-1, Fig. 3.3.5.1.-1, Fig. 3.3.5.2.-1 and Fig. 3.3.7.2.-1

G 29.04.2005 - New configuration, H09, Section 3.3.9. Standard configuration H09

(No sensors).

- Configuration H09 added to Table 2.-1, Table 6.-1, Table 6.-3,

Table 6.-5 and Table 6.-5.

- New table, Table 7.2.5-13.

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1.7. Safety information

Dangerous voltages can occur on the connectors, even though the

auxiliary voltage has been disconnected.

National and local electrical safety regulations must always be

followed.

The device contains components which are sensitive to electrostatic

discharge. Unnecessary touching of electronic components must

therefore be avoided.

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 upper handle of the device will result

in loss of warranty and proper operation will no longer be guaranteed.

When the plug-in unit has been detached from the case, do not touch

the inside of the case. The relay case internals may contain high

voltage potential and touching these may cause personal injury.

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2. Introduction

This document provides descriptions of the standard configurations for 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. A short

introduction of the function blocks available in different standard configurations of

REX 521 is given in Chapter 7. Function block descriptions. Chapter 8. Example

substations, Chapter 9. Application examples, Basic, Chapter 10. Application

examples, Medium, and Chapter 11. Application examples, High 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

(see Section 1.5. Related documents) the FB names are used instead of the

IEC names.

Hardware (HW) versions for 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, for example H02S.

Differences between REX 521 and 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

(see Section 1.5. Related documents). Firstly, there are some terms that refer to other

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

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

REX 521.

Table 2.-1 Standard configurations for REX 521

HW versions Basic Medium High/Sensor

Standard configurations B01 B02 M01 M02

H01

1,6,7

H02

7

H03

6,7

H04

7

H05

7

H06 H07

H08

7,8

H09

7,8

Function

blocks

FB name

(in CD-ROM)

IEEE

device

number

Protection

3I> NOC3Low 51 xxxx x x x xxx x x

3I>> NOC3High 50/51 x x x x x x x x x x x x

3I>>> NOC3Inst 50/51 x x x x x x x x x x x

Io> NEF1Low 51N x x

x

2

xxxx

Io>> NEF1High 50N/51N x x

x

2

xxxx

Io>>> NEF1Inst 50N x x

x

2

xxx

Io>->

4

DEF2Low 67N/51N x x x x x x x

Io>>->

4

DEF2High 67N x x x x x x x

18

1MRS751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

Io>>>->

4

DEF2Inst 67N x x x x x x

3I>-> DOC6Low 67 x

x

3

x

3I>>-> DOC6High 67 x

x

3

3U> OV3Low 59 x x x x x

3U>> OV3High 59 x x x x x

3U< UV3Low 27 x x x x x

3U<< UV3High 27 x x x x x

3I2f> Inrush3 68 x x x x x x x x x x x

Iub> CUB3Low 46 x x x x x x x x

3Ith> TOL3Cab 49F x x x x x x x x

O->I AR5Func 79 x x x x x x x

Uo> ROV1Low 59N x x x x

Uo>> ROV1High 59N x x x x

Uo>>> ROV1Inst 59N x x x x

f1 Freq1St1 81U/81O x x x x x

f2 Freq1St2 81U/81O x x

SYNC1 SCVCSt1 25 x x

Is2t n< MotStart 48, 14, 66 x

3I() PREV3 46R x

I2> NPS3Low 46 x

I2>> NPS3High 46 x

3I< NUC3St1 37 x

FUSEF FuseFail 60 x

3Ithdev> Tol3Dev 49M x x x

U1<U1U2> PSV3St1 27, 47, 59 x

Control functions

I<->O CB1COCB1 xxxx x x x x xxx x x

I<->O IND1 COIND1 x x x x x x x x x x x x x

I<->O IND2 COIND2 x x x x x x x x x x x x x

I<->O IND3 COIND3

x

5

I<->O POS COLOCAT x x x x x x x x x x x x x

ALARM1-8 MMIALAR1-8 x x x x x x x x x x x x x

Measurement

3I MECU3A x x x x x x x x x x x x x

Io MECU1A x x x x x x x x x x x x x

Uo MEVO1A x x x x x x x x x x x

DREC MEDREC x x x x x x x x x x x x x

3U MEVO3A x x x x x x x x x

3U_B MEVO3B xx

fMEFR1 xxxxxxxxx

PQE MEPE7 x x x x x x x x x

Table 2.-1 Standard configurations for REX 521 (Continued)

HW versions Basic Medium High/Sensor

Standard configurations B01 B02 M01 M02

H01

1,6,7

H02

7

H03

6,7

H04

7

H05

7

H06 H07

H08

7,8

H09

7,8

Function

blocks

FB name

(in CD-ROM)

IEEE

device

number

1MRS751802-MUM

REX 521

19

Protection Relay

Technical Reference Manual, Standard Configurations

1

H01 available only as sensor version

2

Configured fixedly to the I

0

(1/5 A) channel or Ios if selected

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

5

Motor status indication

6

Calculated Uo (Uos) used in Sensor configurations

7

Calculated Io (Ios) also available

8

Available only as VT version. VTs are used to measure phase-to-earth voltages, calculated

phase-to-phase voltages are shown by 3U_B

AI1 MEAI1 x

Condition monitoring

CB wear CMBWEAR1 x x x x x x x x x x x x x

TCS1 CMTCS1 x x x x x x x x x x x x x

MCS 3I CMCU3 x x x x x x x x x x x x x

MCS 3U CMVO3 x x x x x x x x x

TIME1 CMTIME1 x

Power quality monitoring

PQ 3Inf PQCU3H x x x x x x x x x x x x x

PQ 3Unf PQVO3H x x x x x x x x x

Standard

SWGRP x x x x x x x x x x x x x

Table 2.-1 Standard configurations for REX 521 (Continued)

HW versions Basic Medium High/Sensor

Standard configurations B01 B02 M01 M02

H01

1,6,7

H02

7

H03

6,7

H04

7

H05

7

H06 H07

H08

7,8

H09

7,8

Function

blocks

FB name

(in CD-ROM)

IEEE

device

number

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

configurations of REX 521

Function Description

Is2t n< Three-phase motor start-up supervision

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

3I() Phase reversal protection

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

I2> Negative phase sequence protection, low-set stage

I2>> Negative phase sequence protection, high-set stage

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

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

3I< Three-phase undercurrent protection

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

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

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

20

1MRS751802-MUM

Protection Relay

Technical Reference Manual, Standard Configurations

REX 521

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

3Ithdev Three-phase thermal overload protection for devices

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

U1<U1U2> Phase sequence voltage protection

f1 Underfrequency or overfrequency protection, stage 1

f2 Underfrequency or overfrequency protection, stage 2

FUSEF Fuse failure protection

SYNC1 Synchro-check / voltage-check function

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

of REX 521

Function Description

I<->O CB1 Circuit breaker control with indication

I<->O IND1 Object indication

I<->O IND2 Object indication

I<->O IND3 Object indication

I<->O POS Logic control position selector

ALARM1-8 Alarm LED 1-8

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

configurations of 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

3U_B Three-phase voltage measurement

f System frequency measurement

PQE Three-phase power and energy measurement

MEAI1 Analog measuring function

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

configurations of REX 521

Function Description

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ABB REX 521 Technical Reference Manual, Standard Configurations

ABB REX 521 Technical Reference Manual, Standard Configurations

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