1MRS 751055-MUM
Directional or Non-Directional Earth-Fault Relay
Operator’s Manual
REJ 527
29
Setting values can be those actual used.
Low-set stage I
0
>
Starting
Close switch S1 and slowly increase the test current until the relay starts and the
indicator I
0
is lit. Then read the start current value from the ammeter.
Definite-time characteristic
1. Set the test current at 2 x the setting value of stage I
0
>.
2. Switch off S1 and clear indicators and reset output relays. The clock is started
by closing switch S1 and stopped by closing output contact PO1.
When the relay starts, the START indicator on the front panel is lit with yellow light.
When the relay operates, the red indicator turns on.
5.2.4.
Testing of the self-supervision system (IRF)
The self-supervision system and the function of the IRF LED and the IRF output can
be tested in the menu “Func.Test/BI”; refer to section 3.3.4. I/O test.
5.2.5.
Testing of the binary input
Navigate in the MMI menu as follows:
1. Configuration
2. Func. Test/ BI
The last digit shows the state of the BI.
Another possibility is to read the state of the BI via the SPA parameter I5.
5.3.
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.
SGR2 = 1
t
0
> to PO1
SGR3 = 8
I
0
>> to SO2
SGR4 = 2
t
0
>> to PO2
SGF2 = 128
deblocking not in use
SGF3 = 5
non-directional
