ABB REX 521 Technical Reference Manual, Standard Configurations

6
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
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

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English