VAMP Ltd
Arc protection system
Technical description
VAMP 221
VM221.EN013
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4.5.
Output relays
4.5.1.
VAMP 221
Connect the circuit breaker’s trip circuits to the following
terminals (a maximum of four separate trip outputs in two
separate groups):
TRIP1:
X1-7, X1-8
(fast, group 1)
TRIP2:
X1-9, X1-10
(fast/CBFP, group 1)
TRIP3:
X1-11, X1-12
(fast, group 2)
TRIP4:
X1-13, X1-14
(fast/CBFP, group 2)
Connect the self-supervision alarm output to an IF change-over
contact, either terminals X1-17, X1-18 (normally open) or X1-
19, X1-20 (normally closed).
During normal system operation (no internal fault) and with
the auxiliary power supply connected, the terminal X1-17, X1-
18 are closed and X1-19, X1-20 are open.
Connect the trip alarm output to the closing terminals X1-15,
X1-16.
4.5.2.
VAM 10L, VAM 3L, VAM 3LX and VAM 4C
Connect the circuit breaker’s trip circuit to the following
terminals:
TRIP1:
X2-15, X2-16
(fast)
The output trip relay of the arc I/O units (VAM 10L and VAM
3L / VAM 3LX) operates during faults in its own zone. In the
current I/O unit (VAM 4C), select the protection zone
controlling the I/O unit using the programming switches.