Toshiba GR200 Series Instruction Manual page 731

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
- 717 -
6F2S1931 (0.20)
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)