30
1MRS 752179-MUM
Earth-Fault Relay
Operator’s Manual
REJ 521
Operate time
Set the test current to 2 x the setting value of stage I
0
>>.
Switch off S1, clear the indicators and unlatch the output contacts. The clock is
started by closing switch S1 and stopped by closing output contact PO2.
5.3.3. Testing of the self-supervision system (IRF)
The IRF output contact and the operation of the READY indicator LED can be
tested by selecting the function test in the HMI menu. Indicator L1 will be lit when
testing the self-supervision-system.
5.4. Spare parts
To achieve the best possible operation accuracy, all parts of the relay have been
calibrated together. Thus, each product forms a whole for which no separate spare
parts can be supplied. In case of malfunction, please consult your relay supplier.
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