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Power Transformers |
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& Multi-winding to suit specific needs & L.T. Transformers
for generating Stations. Upto 10 MVA ,3 Phase , Upto 33Kv,
ONAN / ONAF / OFAF /OFWF Cooling A power transformer
characterized by inner and outer low voltage winding
sections and a high voltage winding section disposed there
between. The low voltage windings are comprised of a
plurality of pancake coils, and the high voltage winding are
comprised of a plurality of conductor strands spirally wound
for a plurality of coil layers. The low and high voltage
winding sections are laterally spaced with the low voltage
windings disposed in side-by-side positions and adjacent to
the high voltage windings. The high voltage windings having
a smaller turn height than the low voltage windings and
having conductor strands of smaller gauge than the pancake
coils of the low voltage windings. |
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A Power transformer is
an electrical device that transfers energy between two or
more circuits through electromagnetic induction.
A varying current in the transformer's primary winding
creates a varying magnetic flux in the core and a varying
magnetic field impinging on the secondary winding. This
varying magnetic field at the secondary induces a varying
electromotive force (EMF) or voltage in the secondary
winding. Making use of Faraday's Law in conjunction with
high magnetic permeability core properties, transformers can
thus be designed to efficiently change AC voltages from one
voltage level to another within power networks.
Transformers range in size from RF transformers less than
a cubic centimeter in volume to units interconnecting the
power grid weighing hundreds of tons. A wide range of
transformer designs is encountered in electronic and
electric power applications.
Generation of electrical power in low voltage level is
very much cost effective. Hence electrical power is
generated in low voltage level.
Theoretically, this low voltage level power can be
transmitted to the receiving end. But if the voltage level
of a power is increased, the electric current of the power
is reduced which causes reduction in ohmic or I2R losses in
the system, reduction in cross sectional area of the
conductor i.e. reduction in capital cost of the system and
it also improves the voltage regulation of the system.
Because of these, low level power must be stepped up for
efficient electrical power transmission. This is done by
step up transformer at the sending side of the power system
network. As this high voltage power may not be distributed
to the consumers directly, this must be stepped down to the
desired level at the receiving end with the help of step
down transformer.
These are the uses of electrical power transformer in the
electrical power system.Two winding transformers are
generally used where ratio between high voltage and low
voltage is greater than 2. It is cost effective to use auto
transformer where the ratio between high voltage and low
voltage is less than 2. Again three phase single unit
transformer is more cost effective than a bank of three
single phase transformer unit in a three phase system. But
still it is preferable to use than the later where power
dealing is very large since such large size of three phase
single unit power transformer may not be easily transported
from manufacturer's place to work site.
The high reliability of these transformers ensures maximum
availability, lower maintenance costs and reduced life-cycle
costs. Our ultimate goal is to exceed our customers'
expectations continually by delivering the highest quality
services. Power transformers comply with our quality policy
by:Consistent management focus on quality;Continually
improving the effectiveness of our Quality Management
System;Understanding our customers goals and embracing them. |
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