1 2 3 4 5 6
9 10 11 1287
Remote Reset
TR...
4 3 2 1
T2-T1 S2-S1
PE
MCB
Shunt
trip
L1 L3L2 N
L O A D
POWER SUPPLY
RD3M: 230-400 VAC
RD3M-48: 12-48 VAC/DC
Remote Reset
TR...
4 3 2 1
T2-T1 S2-S1
L O A D
PE
MCB
1 2 3 4 5 6
Undervoltage
release
L1 L3L2 N
POWER SUPPLY
RD3M: 230-400 VAC
RD3M-48: 12-48 VAC/DC
9 10 11 1287
Fault status
When the level of residual current, detected by the toroid, is higher than
I∆n threshold, the RD3 relay causes the automatic opening of the circuit
breaker to which it is connected by means of the shunt trip.
Connection with the shunt trip when the current is activated:
The residual current protection
is not active when this circuit
breaker is switch-off
22
ABB_76x88mm_RD3M_rev4.indd 22 19/09/11 11:02
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