Where And How Are Power Transformers Used - Miracle Electronics - PowerPoint PPT Presentation

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Where And How Are Power Transformers Used - Miracle Electronics

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Power transformers help us receive electricity at a safe level to run various appliances in our homes and offices. Without them, we could never be able to use electricity! Various types of power transformers make our life easy. – PowerPoint PPT presentation

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Title: Where And How Are Power Transformers Used - Miracle Electronics


1
Where And How Are Power Transformers Used -
Miracle Electronics
The electricity that we receive in our homes is
produced in major proportions in the electrical
grid that sends electricity over vast areas
through power lines. However, the wires used in
power lines are not good electrical conductors
and these imperfections resist the flow of
electrical current. This results in loss of
electrical power over longer power lines. To
resolve this, step-up transformers are used to
raise the voltage produced to a higher value,
thus enabling power to travel longer distances
effectively without loss of power.
In this way, step-up transformers help in
supplying power to transmission lines but this
high voltage of electricity cannot be used by
the end users. Such high power can not only
damage the appliances, but can also cause
hazards and death. This is why the voltage needs
to be decreased again before being sent to the
end customers. Step-down transformers are
therefore used at substations, and also on the
utility poles near buildings, so that the voltage
is lowered and current is increased by the time
the power reaches the end users. In this way,
both step-up and step-down transformers play
important roles in bringing in acceptable amount
of power in homes and offices for our everyday
usage. These step-up and step-down transformers
are the main classifications of power
transformers. However, depending upon the
construction and purpose, power transformers in
India are classified into many other groups,
which are as follows.
2
Step-up and step-down transformers As the names
suggest, step-up and step-down transformers
increase and decrease the voltage level of power
produced respectively to distribute power
throughout the power distribution network. The
biggest example of using step-up and step-down
transformers is in the power grid system right
from the electrical grid to the utility
poles. Single-phase and three-phase
transformers Again as the name suggests,
single-phase transformers accept single-phase AC
current to transfer energy from one circuit to
another through electromagnetic induction.
Conversely, three-phase transformers have three
primary windings connected together and three
secondary windings connected together to provide
economical solutions for supplying large loads
and large power distributions. These transformers
are used in supplying power to various
applications within residential and commercial
equipment like televisions, home inverters,
lighting, heating equipment, and low voltage
electronic devices. Toroidal Transformers These
are doughnut-shaped transformers that are
smaller, save space, and have reduced external
magnetic field. With a ring-shaped core and
copper windings wrapped around the ring, there
is no residual gap in the magnetic path, which
makes these transformers highly efficient,
generating very low off-load losses, and
exhibiting higher inrush current. Toroidal
transformers are used in current switches,
disconnectors, capacitors, and other related
power devices. Isolation Transformers Isolation
transformers are those that link two circuits
magnetically, while providing zero metallic
conductive paths between them. This helps to
prevent coupling of electromagnetic noise and
leakage from AC power system into the appliances.
The best usage of these transformers is in
medical equipment. Autotransformers Autotransfor
mers are those that have one winding tapped at a
point along the winding, wherein voltage is
applied in one portion, and a higher/lower
voltage is produced in the other portion. These
transformers are used where the ratio between
high voltage and low voltage is lesser than 2.
Autotransformers are smaller, lighter, cheaper,
and more efficient. They are used in induction
motors, electrical apparatus in testing labs, and
as boosters in AC feeders.
3
You can get all of these power transformers in
India and more at Miracle Electronics, where
transformers are designed to provide the highest
level of safety to the operator by regulating
and stepping up/down voltages as required.
Miracle Electronics power transformers are RoHS
compliant, REACH compliant, and available with
CE and UL marks on request.
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