VAMP 220 / 220R Arc protection system
User manual
VAMP Ltd
10
Vamp 24h support phone : +358 (0)40 573 6316
VM220.EN004
NOTE!
The arc, overcurrent and E/F (220R) stages can also be
activated from external BI/O signals.
The circuit breaker failure protection subunit (CBFP) starts if
the preconditions for the operation of the arc protection unit
have not disappeared when a set operate time (80, 100 or 150
ms) has elapsed since the arc fault trip. The CBFP, which is
optional, trips its own circuit breaker. When not used, its trip
contacts are left unwired.
If not used for circuit breaker failure protection, the CBFP
output contact (TRIP3) can be set to operate in parallel with
the actual trip circuit (TRIP1), if two circuit breakers are to be
tripped simultaneously.
The desired function for the third trip circuit (TRIP3) is to be
specified when ordering the master unit.
By default, TRIP3 is programmed for CBFP function with a
time delay of 80 ms.
Figure 2.1.2-1 shows the TRIP signalling block diagram of
VAMP 220.
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