Manual

Technical Data 10-9
865-UM001A-EN-P – July 2009
Circuit-breaker Failure Protection
Table 10.23 – Circuit-breaker failure protection CBFP (50BF)
Relay to be supervised T1-T12
Definite time function
- Operating time 0.1  – 10.0 s (step 0.1 s)
Reset time <95 ms
Inaccuracy
- Operating time ±20 ms
 This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
Arc Fault Protection Stages (Option)
The operation of the arc protection depends on the setting value of the
ArcI>, ArcI
0
> and ArcI
02
> current limits. The arc current limits cannot be
set, unless the relay is provided with the optional arc protection card.
Table 10.24 – Arc Protection Stage ArcI> (50AR), Option
Setting range 0.5 - 10.0 x I
n
Arc sensor connection S1, S2, S1/S2, BI, S1/BI, S2/BI, S1/S2/BI
- Operating time (Light only) 13 ms
- Operating time (4xIset + light) 17ms
- Operating time (BIN) 10 ms
- BO operating time <3 ms
Reset time <95 ms
Reset time (Delayed ARC L) <120 ms
Reset time (BO) <80 ms
Reset ratio 0.90
Inaccuracy:
- Starting 10% of the set value
- Operating time ±5 ms
- Delayed ARC light ±10 ms
Table 10.25 –Arc protection stage ArcI
0
> (50AR), option
Setting range 0.5 - 10.0 x I
n
Arc sensor connection S1, S2, S1/S2, BI, S1/BI, S2/BI, S1/S2/BI
- Operating time (Light only) 13 ms
- Operating time (4xIset + light) 17ms
- Operating time (BIN) 10 ms
- BO operating time <3 ms
Reset time <95 ms
Reset time (Delayed ARC L) <120 ms
Reset time (BO) <80 ms
Reset ratio 0.90