An electric device which transforms
electric circuit from one to other through inductively
coupled conductors is known an transformer.
Transformer manufacturers in India, Rajasthan Powergen make transformers which
are used for transmitting high power over long distances. It is done in order
to make the transmission economically viable for the companies. The design of electrical
transformer consists of two coils known as primary and secondary
respectively which are connected to the magnetic field.
Transformers perform two types of function
that is either step up or step down the voltage and is available as either
single phase or three phase. The high voltage transformer has the following
characteristics like the highest voltage and current ratings along with maximum
power. Electrical transformer is used to transfer electricity to homes and
business from power plants.
Transformers are efficient devices with transformers
having efficiency as high as 99.75% and small
transformers with less than 85% efficiency
are available. Rapid deterioration of the insulation and consequent failure of
the transformer coils can take place if it is overheated due to excessive load.
The best way to determine the temperature as Touch is a poor indicator of
proper operating temperature for transformers. Properly designed transformers
can reach 50 degree Celsius above ambient temperature. In an ambient
temperature of 20 degree Celsius, the total temperature can reach 70 degree
Celsius, which is too hot to touch.
Rectangular and elliptical coils have been used for the longest time by the transformer
manufacturing companies in India and are still using it
because they work well for some standard applications and their construction
allows for using high volume manufacturing processes.
If you require a standard distribution
transformer which will be subjected only to limited available fault currents and almost stable loading with
little or no variation and one which should be equipped with fusing or protection devices or if you want
a star connected primary and secondary windings small to medium sized transformer then choosing
rectangular windings is the best option.
If for your need you have to buy
transformers with the capacity of 10 MVA and above, or higher BIL
levels, 350 kV BIL and above, then you
should always go for buying disc-wound, round coils. The disc-wound design and construction has all the
advantages and benefits of layer wound round coils with miter cut cruciform cores and additional
mechanical strength and ability to withstand the harsh
transient fault. Also the construction of
disc helps in reducing the electrical stresses which are present Inside the coil. These stresses are abuses by
switching surge, lightening strikes, and voltage disturbances which are a
regular occurrence in places where large transformers are used and in the
network at higher voltage levels.
Transformer manufacturers in India, RajasthanPowergen recommend that the round coil design is ideal for most of the substation
applications, for essentially all station transformer applications, and for
high-risk distribution transformer applications.
They come at an affordable price and thus lower the total overall cost of the
maintenance and operation.
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