47
Fault Possible Reason Measures
Oil
temperature
alarm
1. Transformer overload operation.
Overload operation may result in a
high oil temperature alarm.
1. Check if the transformer is
overloaded.
2. The heat dissipation channel is
blocked.
2. Check the transformer heat
dissipation channel for foreign
matter jams.
3. The secondary circuit causes a
false alarm.
3. Check the actual oil temperature
of the transformer to see if it is a
false alarm.
Oil
temperature
trip
1. The transformer is overloaded.
1. Check if the transformer oil level
is too low.
2. Internal fault of the transformer.
2. Check if the temperature sensor
is abnormal.
3. Transformer secondary circuit
failure.
Long-term overload operation will
cause the transformer temperature
to continue to rise, resulting in
overcurrent and high voltage
tripping.
3. Check the load on the
transformer.
Check the load through the internal
current meter of the low voltage
cabinet.
If the trip occurs due to an overload,
it is recommended to reduce the
running load.
System Manual 8 Troubleshooting
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