ABB REX 521 Technical Reference Manual, Standard Configurations page 6

REX 521
6
Protection Relay
Technical Reference Manual, Standard Configurations
9.1.5.3. Circuit-breaker failure protection ...................... 114
9.1.5.4. Trip-circuit supervision ..................................... 115
9.1.5.5. Condition monitoring of the breaker wear ........ 115
9.1.5.6. Disconnector and earth-switch indication ........ 115
9.2. Incoming feeder, Basic B01 ...................................................... 117
9.2.1. Features ........................................................................ 117
9.2.2. Measurement connections ............................................ 119
9.2.3. Protection ...................................................................... 119
9.2.3.1. Phase overcurrent protection ........................... 120
9.2.3.2. Earth-fault protection ....................................... 121
9.2.3.3. Protection signal routing .................................. 121
9.2.3.4. Indication and control connections .................. 122
9.2.4. Implementations ............................................................ 122
9.2.4.1. Blocking signal received from the outgoing
9.2.4.2. Outgoing blocking signal to the overcurrent
9.2.4.3. Earth-fault stage Io>>> to trip the breaker on
9.2.4.4. Circuit-breaker failure protection ...................... 123
9.2.4.5. Disturbance recorder ....................................... 123
9.2.4.6. Power quality ................................................... 124
9.3. Transformer feeder, Basic B01 ................................................. 126
9.3.1. Features ........................................................................ 126
9.3.2. Measurement connections ............................................ 129
9.3.3. Protection ...................................................................... 129
9.3.3.1. Phase overcurrent protection ........................... 129
9.3.3.2. Transformer inrush .......................................... 130
9.3.3.3. Protection signal routing .................................. 131
9.3.3.4. Indication and control connections .................. 131
9.3.4. Implementations ............................................................ 131
9.3.4.1. Blocking signal from the MV relay on
9.3.4.2. Circuit-breaker failure protection ...................... 132
9.3.5. Blocking signal overview ................................................ 133
9.4. Outgoing feeder, Basic B02 ...................................................... 135
9.4.1. Features ........................................................................ 135
9.4.2. Measurement connections ............................................ 137
9.4.3. Protection ...................................................................... 137
9.4.3.1. Auto-reclosure function .................................... 137
9.4.4. Protection signal routing ................................................ 140
9.4.5. Indication and control connections ................................ 140
9.4.6. Implementations ............................................................ 141
feeder ............................................................... 122
relay on the HV side ........................................ 122
the HV side of the transformer ......................... 123
the secondary side of the transformer ............. 131
1MRS 751802-MUM