Outputs For Signalling; Irf - ABB RELION 611 Series Applications Manual

1MRS757455 E
5.2.2
5.2.3
REB611
Application Manual

Outputs for signalling

Output contacts SO1 and SO2 in slot X100 can be used for signalling on start and
tripping of the protection relay. On delivery from the factory, the start and alarm
signals from all the protection stages are routed to signalling outputs.
Table 21: Output contacts X100:10...14
Terminal
X100:10
X100:11
X100:12
X100:13
X100:14

IRF

The IRF contact functions as an output contact for the self-supervision system of the
protection relay. Under normal operating conditions, the protection relay is energized
and the contact is closed (X100:3-5). When a fault is detected by the self-supervision
system or the auxiliary voltage is disconnected, the contact X100:3-5 drops off and the
contact X100:3-4 closes.
Table 22: IRF contact
Terminal
X100:3
X100:4
X100:5
Protection relay's physical connections
Description
SO1, common
SO1, NC
SO1, NO
SO2, NO
SO2, NO
Description
IRF, common
Closed; IRF, or U
Closed; no IRF, and U
Section 5
disconnected
aux
connected
aux
65