Table 2 – Check Points For Periodic Inspection - Toshiba HCV-6KALU Instruction Manual

Page 18
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 Make sure all bolts,
screwdriver or nuts and screws are
wrench. tight.
Visual inspection. The contactor should be
clean and contain no
foreign matter.
Visual inspection. Check for rust,
discoloration, wear, or
loose mountings.
Visual inspection. Check for discoloration,
and burned parts.
Visual inspection. Check for rust,
deformation,
discoloration, or
damage.
Visual inspection or Make sure moving parts
touch. Check operate smoothly.
lubrication.
Visual inspection. Make sure there is no
Tighten using discoloration or loose
screwdriver or fasteners.
wrench.
Tighten using a Make sure all bolts,
wrench. nuts and screws are
tight.
See Electrical Check contact wear and
Service Life (Page wipe.
23).
Apply 10kV AC for 1 Check vacuum level by
minute. withstand voltage test.
MAINTENANCE
Criteria 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 the
contactor. See
Table 1 for
tightening torque
specifications.
See Table 1 for
tightening torque
specifications.
Replace vacuum
interrupter.
If breakdown occurs,
contact Toshiba.