ABB REX 521 Technical Reference Manual, Standard Configurations

8
1MRS751802-MUM
Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
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

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English