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
10.2.4.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
Summary of Contents for REX 521
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