Fault Status - ABB RD3 Manual

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:
POWER SUPPLY
RD3: 230-400 VAC
RD3-48: 12-48 VAC/DC
1
7
BB_76x88mm_Rd3_rev4.indd 20
Remote Reset
2 3 4 5 6
8 9 10 11 12
TR...
Shunt
trip
L1
The residual current protection is
not active when this circuit breaker
is switch-off
20
L O A D PE
MCB
L2 L3 N
19/09/11 11:00
PO
RD
RD3-
1
7