are selected with the switches of switchgroups SGR4...SGR8. On delivery from the
factory, the pickup and alarm signals from all the protection elements are routed to
SO1 and SO2.
The IRF contact functions as an output contact for the self-supervision system of the
protection relay, see Table 5.2.1.-3. Under normal operating conditions, the relay is
energized and the contact is closed (X4.1/3-5). When a fault is detected by the self-
supervision system or the auxiliary voltage is disconnected, the output contact drops
off and the contact closes (X4.1/3-4).
Fig. 5.2.1.-1...Fig. 5.2.1.-3 present a rear view of the relay, 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.
140
REF610REF610
Feeder Protection Relay
Technical Reference Manual - ANSI Version
1MRS755535
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