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8-3
8 Maintenance and Inspection
FVR-C11S-EN
8
Check part
Check item
How to inspect
Evaluation criteria
Main circuit
Conductor
and wire
1. Discoloration and distortion
of a conductor by overheat-
ing?
2. Cracks, crazing, and discol-
oration of the wire sheath?
1., 2. Visual
inspection
1., 2. Not abnormal.
Terminal
block
Not damaged?
Visual inspection
Not abnormal.
Smooth-
ing
capacitor
1. Electrolyte leakage, discol-
oration, crazing, and swell-
ing of a case?
2. Is a safety valve not out,
and are any valves protrud-
ing excessively?
3. Measure the capacitance if
necessary
1., 2. Visual
inspection
3. Measure using
the capacitance
measuring
instrument (Note)
1., 2. Not abnormal.
3. The capacitance is
initial value x 0.85 or
more.
Main circuit
Resistor
1. Unpleasant smell and craz-
ing of the insulation by over-
heating
2. No open circuit?
1. Olfactory and vis-
ual inspection
2. Visual inspection
or use a multime-
ter by removing a
connection on
one side.
1. Not abnormal.
2. Less than about
±10% of the indicat-
ed resistance value
Trans-
former
and
reactor
Abnormal buzzing or
unpleasant smell?
Aural, olfactory, and
visual inspection
Not abnormal.
Magnetic
contactor
and relay
1. Rattling when operating?
2. Roughness of contact?
1. Aural
2. Visual inspection
1., 2. Not abnormal.