ABB REF 610 Technical Reference Manual page 136

REF 610 REF 610
136
Feeder Protection Relay
Technical Reference Manual
requested functions are selected separately for each input in switchgroups SGB1...5.
The digital inputs can also be used to trigger the disturbance recorder; this function
is selected with SPA parameter V243.
The auxiliary voltage of the relay is connected to terminals X4.1/1-2, see
Table 5.2.1.-2. At DC supply, the positive lead is connected to terminal X4.1/1. The
permitted auxiliary voltage range of the relay is marked on the front panel of the
relay under the handle of the plug-in unit.
Output contacts PO1, PO2 and PO3 are heavy-duty trip contacts capable of
controlling most circuit breakers, see Table 5.2.1.-4.The signals to be routed to
PO1...PO3 are selected with the switches of switchgroups SGR1...SGR3. On
delivery from the factory, the trip signals from all the protection stages are routed to
PO1, PO2 and PO3.
Output contacts SO1...SO5 can be used for signalling on start and tripping of the
relay, see Table 5.2.1.-4.Output contacts SO3...SO5 are optional and available only
if the optional I/O module has been installed. The signals to be routed to SO1...SO5
are selected with the switches of switchgroups SGR4...SGR8. On delivery from the
factory, the start and alarm signals from all the protection stages 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.
1MRS755310