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REJ 513
User’s Guide
ABB Substation Automation
Products and Systems
1MRS750613-MUM
64
2.2
Testing of the overcurrent stages
Before the test is started:
•
Record the actual SGR settings for later restoring.
•
Set the relay switchgroups as follows:
SGR1 = 4 I> to SO1
SGR2 = 1 t> to PO1
SGR3 = 8 I>> to SO2
SGR4 = 2 t>> to PO2
Setting values can be those actual used.
2.2.1
Low-set stage I>
Starting
The test is carried out as a single-phase test. Close switch S1 and slowly increase the
test current until the relay starts and the indicator L3 is lit. Then read the start current
value from the ammeter.
Operate time
Test according to selected characteristics.
Definite-time characteristic
Set the test current at 2 x the setting value of stage I>.
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
Содержание REJ 513
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