Feeder protection and control / Feeder protection
17 ABB
Table 31. Negative sequence overcurrent protection, I2> / 46
0.1…1.5 x In, in steps of 0.01
Operate delay time, ‘tI2>’
0.04… 300 s, in steps of 0.1
Block the negative phase sequence protection
3% of set value or ± 30ms
Table 32. Circuit breaker failure protection, 3I/IoBF / 51BF/51NBF
Operating phase current, ‘ICBFP’
0.2…2.0 x In, in steps of 0.1
Operating neutral current, ‘IoCBFP’
0.1…2.0 x In, in steps of 0.1
Time delay for retrip, ‘tretrip’
0.06…0.5 s, in steps of 0.01
Time delay for backup protection, ‘tbackup’
0.06…0.5 s, in steps of 0.01
Block the circuit breaker failure protection
± 10.0% of set value for ICBFP <= 0.5 x In
± 5.0% of set value for ICBFP > 0.5 x In
3% of set value or ± 30ms
Table 33. Autoreclosing, O -> I / 79
Auto reclose initialization mode, ‘AR start mode’
1 = Trip, 2 = Gen. start and trip
Type of CB ready signal available, ‘CB ready’
Number of Auto reclose shots, ‘Shot’ (0 = Auto-reclose not in use)
Auto reclose pulse time, ‘Pulse tp’
0.2…20 s, in steps of 0.1
Dead time for first auto reclose shot, ‘Cycle t1’
0.2…300 s, in steps of 0.01
Dead time for second auto reclose shot, ‘Cycle t2’
0.2…300 s, in steps of 0.01
Dead time for third auto reclose shot, ‘Cycle t3’
0.2…300 s, in steps of 0.01
Dead time for fourth auto reclose shot, ‘Cycle t4’
0.2…300 s, in steps of 0.01
Reclaim time, ‘Reclaim tr’
Auto reclosure block time, ‘Block tb’
3% of set value or ± 30ms