38
TROUBLESHOOTING
S.NO.
NOTICED
PROBLEM
PROBABLE CAUSE
REMEDY
1
No Power
at
Output
a)
MCB faulty
Replace the MCB
b)
One of the phase
output one of the
phase output or
lower than set value
and
fault
in
Electronic card.
Replace the control card
c)
Faulty cut-off relay Replace the Faulty relay
d)
Fused
control
blown
Replace the blow off fuse.
e)
Burnt Transformers Replace the burnt transformer with
new one.
f)
Contactor Faulty
Check and replace the contractor
g)
Power
not
collecting through
Carbon brush
Check and replace
h)
One of the phase
voltage not getting
at input terminal
Check each phase voltage
2
Frequent On/Off
of the output
contactor
a) Auto transformer in any
one phase got struck.
a) The mechanical assembly of Auto
transformer is misaligned which may
due to faulty motor Faulty R-C network
and broken Pinion gear or coupling
gear. Take Out the Auto transformer
assembly and realign it.
b) Erratic up and down of
input voltage beyond the
speed of correction of SCVS
(Servo controlled voltage
stabilizer)
b) All power connection to be checked
right from meter to the stabilizer if still
the problem exists Call electricity board
technician Checkup the connection at
Distribution transformer.
Chapter
9
