ABB REU 610, Technical Reference Manual

Page: 112 / 140

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 elements
are routed to PO1, PO2 and PO3.
Output contacts SO1...SO5 can be used for signalling on pickup 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 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 voltage 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.
112
REU 610
Voltage Relay
Technical Reference Manual - ANSI Version
1MRS755972