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VAMP Ltd
Over-, under-, residual voltage and
frequency relay
Technical description
VAMP 135
VM135.EN008
VAMP 24h support phone : +358 (0)20 753 3264
25
CLOSE COIL
OPEN COIL
close control
trip circuit
failure alarm
VR10CB
−
V
AUX
+V
AUX
−
V
AUX
VAMP 1xx relay
Binary input
Trip relay
Alarm relay
for trip
circuit failure
relay compartment
circuit breaker compartment
Figure 3.4-1. Trip circuit supervision when the circuit breaker is closed. The
supervised circuitry in this CB position is marked with an extra parallel
line. The digital input is in active state.
CLOSE COIL
OPEN COIL
close control
trip circuit
failure alarm
VR10CB
−
V
AUX
+V
AUX
−
V
AUX
VAMP 1xx relay
Binary input
Trip relay
Alarm relay
for trip
circuit failure
relay compartment
circuit breaker compartment
Figure 3.4-2. Trip circuit supervision when the circuit breaker is open. The
supervised circuitry in this CB position is marked with an extra parallel
line. The resistor device VR10CB offers an active input state for the digital
input although the open coil auxiliary contact is open.