Table 2 – Check Points For Periodic Inspection - Toshiba HCV-1JBU Vacuum Contactor, 1.5kV - 600A HCV-1KAU Vacuum Contactor, 1.5kV - 720A Instruction Manual

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Table 2 - Check Points for Periodic Inspection
Check Check Item
Point
Operating Loose bolts,
Mechanism nuts or
screws
Dust or
foreign
matter inside
Electro-
magnets
Closing coil
Spring
Smooth
operation
Main Circuit Terminals
and movable
conductors.
Loose bolts,
nuts or
screws
Vacuum
contact wear.
Vacuum
level.
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Check Method
Tighten using
screwdriver or
wrench.
Visual inspection.
Visual inspection.
Visual inspection.
Visual inspection.
Visual inspection or
touch. Check
lubrication.
Visual inspection.
Tighten using
screwdriver or
wrench.
Tighten using a
wrench.
See Electrical
Service Life (Page
23).
Apply 10kV AC for 1
minute.
MAINTENANCE
Criteria
Make sure all bolts,
nuts and screws are
tight.
The contactor should be
clean and contain no
foreign matter.
Check for rust,
discoloration, wear, or
loose mountings.
Check for discoloration,
and burned parts.
Check for rust,
deformation,
discoloration, or
damage.
Make sure moving parts
operate smoothly.
Make sure there is no
discoloration or loose
fasteners.
Make sure all bolts,
nuts and screws are
tight.
Check contact wear and
wipe.
Check vacuum level by
withstand voltage test.
Disposition
Tighten if loose.
See Table 1 for
tightening torque
specifications.
Wipe with a clean
dry cloth.
Wipe with a clean
dry cloth.
Wipe with a clean
dry cloth.
Wipe with clean dry
cloth. Lubricate if
necessary.
Apply a small
amount of
lubrication.
Check the cause
and repair. Tighten
connections to
contactor. See
(Table 1) for
tightening torque
specifications.
See Table 1 for
tightening torque
specifications.
Replace vacuum
interrupter.
If breakdown occurs,
contact Toshiba.