Cautions
Safety Precautions
(i)
CAUTION
The IED rack is provided with a grounding terminal.
Before starting the work, always make sure the IED rack is grounded.
When connecting the cable to the back of the IED, firmly fix it to the terminal block
and attach the cover provided on top of it.
Before checking the interior of the IED, be sure to turn off the power.
Class 1 laser.
Failure to observe any of the precautions above may cause electric shock or malfunction.
Cautions on Tests
(ii)
CAUTION
While the power is on, do not connect/disconnect the flat cable on the front of the
printed circuit board (PCB).
While the power is on, do not mount/dismount the PCB.
Before the power is on, check the following:
-
Make sure the polarity and voltage of the power supply are correct.
-
Make sure the CT circuit is not open.
-
Make sure the VT circuit is not short-circuited.
Transformer module is damaged due to an overcurrent or overvoltage.
Clear test settings after the test; then, set original settings again.
Failure to observe any of the precautions above may cause damage or malfunction of the relay.
Before mounting/dismounting the PCB, take antistatic measures such as wearing an earthed
wristband.
Preparations
Test equipment
The following test equipment is required for the commissioning tests.
1 Three-phase voltage source
2 Single-phase current sources
1 Dynamic three-phase test set (for protection scheme test)
1 DC power supply
3 DC voltmeters
3 AC voltmeters
3 Phase angle meters
2 AC ammeters
- 1325 -
6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)