Power transformers
are important devices used to transfer current from one circuit to another. You
require them to provide high performance and a long functional life. And for
that, you need to take every possible care about their maintenance. Different
parameters of these power transformers
need to be measured and tested so that this costly equipment never turns you
down. Certain regular maintenance activities need to be performed to ensure a
smooth performance of these transformers – some on a daily basis, some monthly,
while some yearly. We will be speaking about all of these maintenance
procedures in this blog. Remember that if these regular maintenance procedures
are carried out properly, any emergencies and breakdown maintenance can be
avoided.
There are three important things you must check for in your
power transformer every day. These include the colour of the silica gel in the
breather to avoid it from becoming pinkish, oil leakage if any, and the reading
of Magnetic Oil Gage of the main tank and conservator tank to be up till the
specified limit.
Monthly maintenance
of power transformers
There are some things you must keep a check on once in a
month to ensure the perfect working of a power transformer. The breathing holes
in silica gel breather must be properly cleaned for proper breathing. The oil
level in the oil cap should be maintained to the specified level if it has gone
too low. The oil level inside the oil filled bushing should also be maintained.
But, you must note that the entire oil filling should be done under shutdown
condition.
Half-yearly maintenance
of power transformers
Every six months, the transformer oil must be checked for
its water content, sludge content, acidity, dielectric strength, resistivity,
flash point, DDA and IFT. Any changes or issue found must be immediately
addressed.
Yearly maintenance of
power transformers
·
Every year, the bushings need to be cleaned and
checked for cracking. Also, all the marshalling boxes, illumination and space
heaters should be cleaned and checked for proper functioning.
·
All the terminal connections and wiring must be
checked and tightened. Also, all the relays, alarms, control switches and
circuits in the R&C panel and RTCC should be checked and cleaned.
·
The oil condition of the OLTC needs to be examined
for dielectric strength and moisture content by taking a sample from the drain
valve of divertor tank. In case of any issues, the oil must be filtered or
replaced.
·
All the items engaged with the cooling system of
the transformer must be checked. These include the air fans and oil pumps, of
which the auto, remote and manual functioning must be checked.
·
Other essential components that need to be
checked include the OTI pockets, WTI pockets, Pressure Release Device and
Buchholz Relay.
For purchasing the best transformers, you can get in touch
with Miracle Electronics, the leading transformer manufacturer in India, who assures to use the highest quality materials and
procedures to construct its equipment. However, even with the best transformer
purchase, make sure to regularly check for the above mentioned inspections to
ensure an even longer life of your transformers.
SUMMARY
If
you want your power transformers to provide high performance and a long functional
life, you need to make certain checks on them. Some of these checks may be
required every day, while some may be required monthly or yearly. Here is an
exhaustive list.
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