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TOSHIBA
o n
Control
wiring
equipment
Auxiliary switch
Drive unit
Insulation
Main circuil
resistance
Operation
circuit
Dielectric
Main circuit
strength
Remarks: For extraordinary (unscheduled) inspections , pick up check items from the above table.
Check for discoloration
and tightness.
Amount of dust attache<
Overheat, discoloration.
Measure insulation
resistance between
phases, between
electrodes and between
circuits and ground.
(Measurement is taken
by 1 OOOV megger.)
Measure insulation
resistance between
circuits and ground.
(Measurement is taken
by 500V megger.)
Measure dielectric
strength between phase
between electrodes and
between circuits and
ground.
Perform open/close
operation by electric
operation test to confirrr
the correct operation.
16
I
I
Wore than 50M R
,
I
.
IO minutes.
What to do
I
I
I
I
Nhen the insulatio
I
is
t
I
I
evel, investigate tt
I
f found abnormal
I
nform the maker.
I
f found abnormal,
I
f necessary,
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