ABB RELION REB500 Operation Manual page 49

1MRK 505 400-UEN B
transfer-tripping signal to the remote station generated either at the end of time t1 or t2 can
also be enabled using HMI500.
The currents of the three phases are measured individually and compared with the pick-up
setting, which is identical for the three phases.
Since there are three separate t1 timers for the individual phases, the REB500 BFP responds
correctly to an evolving fault.
Logic 4 can be used in stations with 2 redundant REB500 units, one for busbar and the other
for breaker failure protection. In this case, the special inputs 13760_Start BFP L1L2L3_5 and
13765_Start BFP L1L2L3_6 on the REB500 for BFP are used to instantly initiate intertripping
after t1 independently of the time setting of t2.
The following breaker failure parameters can be set using HMI500:
Table 33:
Parameter
BFP active
Setting (per current
transformer)
Timer 1 active
Timer 2 active
Timer t1
Timer t2
Intertripping pulse duration
Logic type
Enable start input supervision
Start input supervision, timer
settings
Distributed busbar protection REB500
Technical manual
Parameters for setting BFP
Min.
0.1
10
0
10
1
5
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Max. Default
inactive
2.0 1.2
active
active
5000 100
5000 120
5000 100
4 1
inactive
100 10
Section 6
Additional protection options
Step Unit
0.1 I
N
10 ms
10 ms
10 ms
1
1 s
43