Fuji Electric FVR-C11S-7EN Series - Page 80

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 b
y
overheat-
in
g
?
2. Cracks, crazin
g
, and discol-
oration of the wire sheath?
1., 2. Visual
inspection
1., 2. Not abnormal.
Terminal
block
Not dama
g
ed? Visual inspection Not abnormal.
Smooth-
in
g
capacitor
1. Electrol
y
te leaka
g
e, discol-
oration, crazin
g
, and swell-
in
g
of a case?
2. Is a safet
y
valve not out,
and are an
y
valves protrud-
in
g
excessivel
y
?
3. Measure the capacitance if
necessar
y
1., 2. Visual
inspection
3. Measure usin
g
the capacitance
measurin
g
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-
in
g
of the insulation b
y
over-
heatin
g
2. No open circuit?
1. Olfactor
y
and vis-
ual inspection
2. Visual inspection
or use a multime-
ter b
y
removin
g
a
connection on
one side.
1. Not abnormal.
2. Less than about
±10% of the indicat-
ed resistance value
Trans-
former
and
reactor
Abnormal buzzin
g
or
unpleasant smell?
Aural, olfactor
y
, and
visual inspection
Not abnormal.
Ma
g
netic
contactor
and rela
y
1. Rattlin
g
when operatin
g
?
2. Rou
g
hness of contact?
1. Aural
2. Visual inspection
1., 2. Not abnormal.