TRISHUL Winding Solutions Pvt Ltd. Transformers Electrical power transformer is a static device which transforms electrical energy from one circuit to.
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Slide 1
TRISHUL Winding Solutions Pvt Ltd
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Transformers Electrical power transformer is a static device
which transforms electrical energy from one circuit to another
without any direct electrical connection and with the help of
mutual induction between two windings. It transforms power from one
circuit to another without changing its frequency but may be in
different voltage level. Electrical power transformer is a static
device which transforms electrical energy from one circuit to
another without any direct electrical connection and with the help
of mutual induction between two windings.
Slide 3
Uses It can rise or lower the level of Voltage or Current (
when voltage increases, current decreases and vice versa because P
=V x I, and Power is same ) in an AC Circuit.
Slide 4
Transformer is the main reason to transmit and distribute power
in AC instead of DC, because Transformer not work on DC so there
are too difficulties to transmit power in DC.
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Step Down Transformer Turnings More Turns Voltage High Current
- Low Turnings Less Turns Voltage Low Current - High
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Step Up Transformer Turnings Less Turns Voltage Low Current -
High Turnings Less Turns Voltage Low Current - High
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Power Transformer
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o Electrical power is generated in low voltage, as it is cost
effective. o But, these low voltage level of power cant be
transmitted to the consumer end directly as it will cause losses if
the voltage level increases during transmission. o Hence, it has to
stepped up at the transmission end and should be stepped down in
the receiving end. Disadvantage: o Expensive
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Auto Transformer Auto transformer is kind of electrical
transformer where primary and secondary shares same common single
winding. o It is used when the ratio between high voltage and low
voltage is greater than 2 o It is cost effective as it consist of
single winding, hence the copper usage in winding is less and area
is also less when compared to power transformer
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Disadvantage: o For transformation ratio = 2, the size of the
auto transformer would be approximately 50% of the corresponding
size of two winding transformer. o But for the transformation ratio
say 20, however the size would be 95%. Hence the saving cost is
appreciable when the ratio of transformer is low, that is lower
than 2. o An electrical connection between the primary and
secondary is not always desirable o Auto-transformers are
particularly sensitive to the atmospheric over- voltages.