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MAINTENANCE
Table 2 – Check Points for Periodic Inspection (cont.)
Check
Check Item
Point
Dielectric
Measure
Strength
main circuit
Open/Close
Operation
Table 3 – Wear and Replacement Check Values
Dimensions are MM (inches)
Typeform
Vacuum Interrupter Wipe
New
Needs Replacement
Aux. Contact Overtravel
New
Needs Replacement
Number of Electrical
Operations Before Component
Replacement Is Required
Vacuum Interrupters
Auxiliary Contacts
Check Method
Measure dielectric
strength between
phases and between
circuits and ground.
---
Perform open/close
operation by electric
operation test to
confirm the correct
operation.
CV-1GAU
CV-1HAU
>1.5mm (.059)
<0.5mm (.019)
2.9 - 3.2mm
(.114 – .125)
0.5mm (.019)
500,000
500,000
Criteria
10kV AC for 1 minute.
---
CV-1GAU-P2
CV-1GAUMIL
CV-1HAU-P2
CV-1HAUMIL
>1.5mm (.059)
>2.5mm (.098)
<0.5mm (.019)
<0.5mm (.019)
2.9 - 3.2mm
0.8 – 1.2mm
(.114 – .125)
(.031 – .047)
0.5mm (.019)
0.4mm (.016)
500,000
500,000
Page 19
What to do
If breakdown occurs,
contact Toshiba.
If not normal, check
and repair. If
necessary, replace
faulty parts.
CV-1GAU-C
CV-1HAU-C
>1.5mm (.059)
<0.5mm (.019)
2.9 - 3.2mm
(.114 – .125)
0.5mm (.019)
100,000
500,000
100,000
500,000
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