Terminal
Description
X130:14
SO2, NO
X130:15
SO2, NC
X130:16
SO3, common
X130:17
SO3, NO
X130:18
SO3, NC
5.2.3
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 output contact drops off and the
contact closes (X100:3-4).
Table 39:
IRF contact
Terminal
Description
X100:3
IRF, common
X100:4
Closed; IRF, or U
aux
disconnected
X100:5
Closed; no IRF, and U
aux
connected
1MRS757456 D
Section 5
Protection relay's physical connections
REF611
177
Application Manual
Summary of Contents for REF611
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