Transformer oil design
Reliable transformermanufacturers in India, Rajasthan Powergen realise the importance of Energy
transformers as vital components of the energy distribution grid and thus it
becomes imperative to have a monitoring and maintenance plan in place to prevent
their failure. One of the critical components of an energy transformer is the
transformer oil.
A transformer needs
to operate in a moisture free environment and even the tiniest presence of moisture
can seriously reduce its life. Most companies follow an oil maintenance
schedule to monitor the condition of oil and detect a problem before it causes
considerable damage. Oil testing during maintenance also helps find out problems
like contact arcing, ageing insulating paper and other
latent faults.
Steps for Collecting
Oil Sample for Transformer Oil Testing:
Oil testing is an
important process .it is done before the transformer start-up, during a routine
transformer inspection or in any cases where possibility of damage to
transformer is indicated.
To collect an oil
sample a sampling valve located near the bottom of the tank is used.
Transformer oil is a hygroscopic substance and must be protected from contact
with moisture and thus should be stored in a dry container.
Oil Treatment
Guidelines
Below are some of
the guidelines to be followed for oil treatment to enhance the life of
transformer
* Purify when the
acid level is still low, i.e. 0.20 mg KOH/g oil
* Dry-out when the
solid insulation is wet >3.5 % MDW
Purification, a
method of transformer oil maintenance
The method through
which moisture and gasses are removed from the insulating oil is known as
purification. In process oil is dried up but not the insulation system, as the
drying depends on the rate of diffusion of water through the paper into the
oil, which is slow.
Reliable transformer
manufacturers in India, Rajasthan Powergen use the purification method just
because it is an effective moisture management tool even though not the best .
It has widespread use in the industry to bring down the moisture content and
raise the dielectric strength of the oil in wet core situations.