Red Indication Led - ABB REJ 527 Operator's Manual

Directional or non-directional earth-fault relay

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REJ 527

3.3.7.

Directional or Non-Directional Earth-Fault Relay

Operator's Manual

Red indication LED

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TRIP

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TRIP indicator

• Indicator off:

• Normal operation mode. No protection function has tripped.

• Lit indicator:

• A protection function has tripped. The trip indication is latching, i.e. it must be

reset by pressing the [C] button or via serial communication. As long as the

protection function is active it is not possible to reset the trip indicator.

Further, the indicators may be reset via the binary input X2.1/17-18 by applying

control voltage to the input, provided switches SGB1/1...3 are in position 1.

The basic protection relay functions do not depend on the state of the operation

indicators, reset or non-reset. The relay is permanently operative.

1MRS 751055-MUM

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