ABB REF 610 Technical Reference Manual page 125

1MRS 755535
Feeder Protection Relay
Technical Reference Manual - ANSI Version
The IRF contact functions as an output contact for the self-supervision system of the
protection relay (see table 4.2.1-3). Under normal operating conditions the relay is
energized and the contact closed (X4.1/3-5). When a fault is detected by the
self-supervision system or the auxiliary voltage is disconnected, the output contact
will drop off and the contact close (X4.1/3-4).
Fig. 4.2.1.-1...Fig. 4.2.1.-3 present a rear view of REF 610, showing four connecting
sockets: one for measuring transformers, one for the optional I/O module, one for
power supply and one for optional serial communication.
X3.1
X4.1
1
2
3
X5.1
4
5
6
X5.2
7
8
9
TX
10
X5.3
11
12
RX
13
14
15
TX
16
17
X5.4
18
RX
19
20
21
22
23
24
Fig. 4.2.1.-1 Rear view of REF 610 with the fibre-optic communication module
for plastic and glass fibre with light sensor inputs
X2.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
REF 610
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