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Page 28
Table 2 Check Points for Periodic Inspection
Check Point
Check Item
Operating
Loose bolts,
Mechanism
nuts or screws
Dust or foreign
matter inside
Indicator
operation
Warpage
Smooth
operation
Main Circuit
Discoloration
due to heat
from conducting
parts
Loose bolts,
nuts or screws
Dust on surface
of vacuum
interrupter
Insulator
Dust, foreign
matter or
damage
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Check Method
Tighten using
Make sure all bolts, nuts
screwdriver or
and screws are tight.
wrench.
Visual
The circuit breaker
inspection.
should be clean and
contain no foreign matter.
Visual
Make sure the number of
inspection.
operations is correctly
displayed.
Visual
There should be no
inspection.
warpage or missing
parts.
Manual
Make sure moving parts
operation.
operate smoothly.
Visual
inspection or
touch. Check
lubrication.
Visual
Make sure there is no
inspection.
discoloration.
Tighten using a
Make sure all bolts, nuts
wrench.
and screws are tight.
Visual
Make sure there is no
inspection.
dust on the surface.
Visual
Make sure there is no
inspection.
dust, foreign matter or
breakage.
DISPOSAL
Criteria
Tighten if loose.
See
Table 1 for
tightening torques.
Wipe with a clean
dry cloth.
Check the cause
and repair.
Check the cause
and repair.
Apply a small
amount of
lubrication.
Check the cause and
repair. Tighten
connections to circuit
breaker. See
Table 1 for
tightening torques.
See
Table 1 for
tightening torques.
Wipe with a clean,
dry cloth.
Wipe with a clean,
dry cloth. If
damaged, contact
Toshiba.
Disposition
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