ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS751802-MUM
REX 521
7
Protection Relay
Technical Reference Manual, Standard Configurations
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

ABB REX 521 Specifications

General

Brand	ABB
Model	REX 521
Category	Other
Language	English