What Causes Generator Transformer Oil Level to Be Too High or Low
by Starlight Generator dieselgeneratortech1. The oil level is too
high.
The
oil level is higher than the oil level line due to the increase of oil
temperature. Sometimes the oil level reaches the top line or the oil level
cannot be seen. The reason is as follows:
The
operation of the transformer cooler is abnormal, which causes the temperature
of the transformer oil to rise and the oil to expand, resulting in the oil
level to rise. The oil level of the transformer is much higher when refueling.
Once the ambient temperature rises, the oil level will be too high. If the oil
level is too high, which caused by the abnormal operation of the cooler. Check
whether the surface of cooler is blocked by ash and whether the upper and lower
valves of oil pipe are opened. Check whether the pipeline is blocked and
whether the fan and submersible pump operate normally and reasonably. And check
whether the temperature of cooling medium is suitable and the flow rate is
sufficient.
If
the oil level is too high due to excessive oil filling, we should drain the oil
to a proper height. If the oil level cannot be seen, it should be judged that
the oil level is indeed higher than the oil level line, and then drain the oil
to a proper height.
2. The oil level is too
low.
When
the oil level of the transformer is lower than the oil level corresponding to
the oil temperature at that time. If the oil level is below the low oil level
line or cannot be seen, it shall be judged that the oil level is too low. The
reason is that:
Oil leakage of
transformer.
The
original oil level of the transformer is not high. In case of sudden decrease
of transformer load or external environment temperature, the oil level is too
low. When the oil of the strong oil water-cooled transformer flows into the oil
cooler for a long time, this also causes the oil level too low. Low oil level
will cause light gas protection action. If it is float relay, it will also
cause heavy gas protection trip. In case of serious oil shortage, the
transformer core and winding will be exposed to the air. This is not only
susceptible to moisture, but also reduces the insulation and may cause
insulation breakdown. Therefore, if the oil level of the transformer is too low
or the oil level is reduced, make up the oil to the normal level as soon as
possible.
In
addition to the problem of too high or too low oil level, false oil level may
be encountered.
3. False oil level.
The cause of false oil
level may be:
When
the non capsule sealed conservator oil gauge tube is blocked. When the
respirator is blocked or the explosion-proof pipe air hole is blocked, the
false oil level will appear. When there is a certain amount of air in the
encapsulated conservator, capsule obstructed breathing, unreasonable position
of capsule and rupture of capsule bag, it also causes false oil level.
Therefore,
during the treatment, the heavy gas protection should be removed first.
If
the oil level of the generator transformer is abnormal, find out the cause in
time, remove the fault and ensure the normal operation of the unit.
If
the oil level is obviously reduced due to serious oil leakage, it is forbidden
to change the gas protection from trip to signal, should eliminate oil leakage
and make oil level return to normal. If there is a large amount of oil leakage
and the oil level drops below the gas relay or continues to drop, the
transformer shall be stopped immediately. Before the treatment, the heavy gas
protection should be removed first.
When
the generator transformer is running, it is necessary to maintain the normal
oil level. The operator on duty shall check the indication of the oil level
gauge on time. When the oil level is too high (such as in summer), drain the
oil in time. When the oil level is too low (such as in winter), make up the oil
in time to maintain the normal oil level and ensure the safe operation of the
transformer.
The
improper oil level of transformer of diesel generator set has a great influence
on the unit. So we must pay attention to the problem.
Based
on the above introduction of three abnormal oil levels by Jiangsu Starlight
company, users should be able to find the importance of normal oil level of
transformers of diesel generator. Therefore, Starlight Power reminds the user
to keep the oil level of diesel generator normal. If the oil level is too high
or too low, do not panic. Check and analyze the cause of the situation in time
and solve it correctly.
Sponsor Ads
Created on Dec 5th 2019 00:37. Viewed 219 times.