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18
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6F9G0154
Location
What to inspect
Decision criteria
What to do
wiring
Check for discoloration
and tightness.
-
Retighten.
Auxiliary switch
Amount of dust attached.
Check by sight.
Replace if damage
is excessive.
Control
equipment
Drive unit
Overheat, discoloration.
Check by sight.
Replace if abnormal
Main circuit
Measure insulation
resistance between
phases, between
electrodes and between
circuits and ground.
(Measurement is taken
by 1000V megger.)
More than 50M
Ω
Insulation
resistance
Operation
circuit
Measure insulation
resistance between
circuits and ground.
(Measurement is taken
by 500V megger.)
More than 1M
Ω
When the insulation
resistance is
below the standard
level, investigate the
cause and, if
necessary, replace
parts.
Dielectric
strength
Main circuit
Measure dielectric
strength between phases,
between electrodes and
between circuits and
ground.
AC 1.5E for
10 minutes.
If found abnormal
inform the maker.
Open/close operation
Perform open/close
operation by electric
operation test to confirm
the correct operation.
If found abnormal,
check and repair.
If necessary,
replace faulty parts.
Remarks: For extraordinary (unscheduled) inspections , pick up check items from the above
table.
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