Fault Status - ABB RD3P 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
RD3P: 230-400 VAC
RD3P-48: 12-48 VAC/DC
1
ON
1
0,5
0,3
0,1
0,03
TEST
7
BB_76x88mm_Rd3P_rev4.indd 24
Remote Reset
2 3 4 5
l %
20% 40% 60% 80%
FAULT
l n [A] t [s]
2 0,5 1
3 0,3 2
5 0,2 3
10 0,06 5
30 0 10
RD3P
Pre Alarm
RESET
Autoreset
OFF ON IEC60947-2/M
Test no Trip (3s)
8 9 10 11
6
Shunt
trip
12
The residual current protection
is not active when this circuit
breaker is switch-off
24
L O A D
TR...
L1 L2 L3 N
PE
PO
RD
RD3P
0,5
0,3
0,1
0,03
MCB
TE
19/09/11 11:04
1
O
1
7