Circuit-Breaker Failure Protection; Arc Fault Protection Stages (Option); Arc Protection Stage Arci> (50Ar), Option - Allen-Bradley Rockwell Automation 857 User Manual

Circuit-breaker Failure Protection

Table 10.38 – Circuit-breaker failure protection CBFP (50BF)
Relay to be supervised
Definite time function
- Operating time
Reset time
Inaccuracy
- Operating time
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 > and ArcI
0
cannot be set, unless the manager is provided with the optional arc
protection card.
Table 10.39 – Arc protection stage ArcI> (50AR), option
Setting range
Arc sensor connection
- Operating time (Light only)
- Operating time (4xIset + light)
- Operating time (BIN)
- BO operating time
Reset time
Reset time (Delayed ARC L)
Reset time (BO)
Reset ratio
Inaccuracy:
- Starting
- Operating time
- Delayed ARC light
Technical Data
T1-T14 (depending the ordering code)
0.1 – 10.0 s (step 0.1 s)
<95 ms
±20 ms
> current limits. The arc current limits
02
0.5 - 10.0 x I
n
S1, S2, S1/S2, BI, S1/BI, S2/BI, S1/S2/BI
13 ms
17ms
10 ms
<3 ms
<95 ms
<120 ms
<80 ms
0.90
10% of the set value
±5 ms
±10 ms
10-17
857-UM001A-EN-P – July 2009