ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS751802-MUM
REX 521
9
Protection Relay
Technical Reference Manual, Standard Configurations
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

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English