Toshiba HCV-1JBU Instruction Manual

 

 

 

 

Main Circuit  Dust on 

surface of 

vacuum 

interrupter 

Visual inspection. 

Make sure there is no 

dust on the surface. 

Wipe with a clean, 

dry cloth. 

Insulation 

Frame and 

Flanges 

Dust, foreign 

matter or 

damage 

Visual inspection. 

Make sure there is no 

dust, foreign matter or 

breakage. 

Wipe with a clean, 

dry cloth.  If 

damaged, contact 

Toshiba. 

Control 

Circuits 

Auxiliary 

Switch 

See Table 3. 

Contact wear and wipe. 

Make sure there is no 

dust. 

Replace if wear or 

damage is 

excessive. See 

Table 1 for 

tightening torque 

specifications 

 

Drive unit 

Visual inspection. 

Check for overheating 

and discoloration. 

Replace if damaged.

 

Wiring 

Visual inspection.  

Tighten using a 

screwdriver. 

Check for discoloration 

and tightness. 

Repair if 

disconnected.  

Tighten if loose.  

See Table 1 for 

tightening torque 

specifications. 

Insulation 

Resistance 

Measure-

ment 

Resistance 

from main 

circuit to 

ground 

Measure insulation 

resistance between 

phases, between 

electrodes, and 

between circuits and 

ground.  Megger test 

at 1000V. 

Resistance should be 

50MΩ or greater. 

 

Resistance 

from control 

circuits to 

ground 

Measure insulation 

resistance between 

circuits and ground.  

Megger test at 

500V. 

Resistance should be 

1MΩ or greater. 

If the insulation 

resistance is low, 

wipe off the vacuum 

interrupter and other 

insulation surfaces 

with a clean dry 

cloth and then 

repeat the test.  If 

necessary, replace 

faulty parts. 

 

 

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