Irf - ABB RELION 615 Series Applications Manual

Capacitor bank protection and control

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Table of Contents

1MRS758955 A

5.2.3

REV615

Application Manual

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 33:

IRF contact

Terminal

X100:3

X100:4

X100:5

Protection relay's physical connections

Description

IRF, common

Closed; IRF, or U

Closed; no IRF, and U

Section 5

disconnected

aux

connected

aux

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Relion rev615