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8
Troubleshooting
This chapter only lists the common troubleshooting methods on the transformer side. For
more specific information, refer to the relevant transformer and ring network cabinet user
manual.
Fault
Possible Reason
Measures
Pressure relief trip
The internal short circuit
of the transformer is
faulty.
If it is a short circuit fault, take an oil
sample for oil sample chromatography
to further determine the cause of the
fault. It is strictly forbidden to put the
transformer into operation before the
cause of the fault is not ascertained and
the fault has not been resolved.
(Note: If it is determined that the internal
fault is serious, the inside of the
transformer has been damaged, contact
Sungrow for replacement.)
The pressure relief valve
is faulty.
The pressure relief valve elastic element
expander internal jam, or the bolt torque
of the fastening film is too large,
resulting in damage to the film, contact
Sungrow for replacement.
Improper oiling operation
before
servicing
or
installing the transformer.
If the pressure relief
valve on the tank is not
opened as required.
After power off, open the oil hole to
release the pressure inside the tank.
Low oil level trip
The secondary circuit
causes a false alarm of
low oil level.
Check the secondary circuit to confirm if
it is malfunctioning.
The transformer leaks oil
or leaks for a long time.
After the oil was drained
due to maintenance or
Fill the transformer with oil.
Summary of Contents for MVS6250
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