Toshiba GR200 Series Instruction Manual

Also see for GRB200: Instruction manual

6F2S1931 (0.20)Centralized GRB200(Soft: 030, 031, 032, 033, 034)- 717 -Cautions(i) Safety PrecautionsCAUTION 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 blockand 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.(ii) Cautions on TestsCAUTION While the power is on, do not connect/disconnect the flat cable on the front of theprinted 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 earthedwristband.PreparationsTest equipmentThe following test equipment is required for the commissioning tests.1 Three-phase voltage source2 Single-phase current sources1 Dynamic three-phase test set (for protection scheme test)1 DC power supply3 DC voltmeters3 AC voltmeters3 Phase angle meters2 AC ammeters