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REX 521

ABB REX 521 Technical Reference Manual, Standard Configurations

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Protection Relay
REX 521
Technical Reference Manual, Standard Configurations
Protection Relay
Technical Reference Manual, Standard Configurations
©Copyright 2005 ABB Oy, Distribution Automation, Vaasa, FINLAND 3
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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REX 521
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.
Copyright © 2005 ABB Oy
All rights reserved.
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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Technical Reference Manual, Standard Configurations
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
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1MRS751802-MUM
REX 521
15
Protection Relay
Technical Reference Manual, Standard Configurations
Parameter and event lists for REX 521
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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.
!
1MRS751802-MUM
REX 521
17
Protection Relay
Technical Reference Manual, Standard Configurations
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
/