When you pass electricity through wires you warm the wires up. This heat is a total loss of energy. So you want to keep the loss to a minimum. The heating effect of electricity is increased with an increase in amperage (the current). The amount of power that goes through the wires is a function of the voltage x amps. So to transmit a certain amount of power with the minimum heat loss you keep the current down which mean pushing the voltage up. This is why the transmission wires near the generating station carry very high voltages. But these voltages are unsafe for use in domestic circuits so they have to be reduced by a series of Transformers from the high voltages in the main lines to lower voltages at substations to even lower voltages in the home.
But transformers are used in many other ways, but basically to change the voltage of the supply. Like your cellphone charger reduces the mains voltage to whatever it is your phone operates on, say 9 volts.
1. It is a static device which transforms the voltage (electromagnetically). In certain cases, the required voltage of a system needs to be increased or decreased, so in those cases a step up/ step down transformer is a must required.
2. Secondly it may be called as a protection device to the electrical network. At times due to heavy electrical faults it trips by keeping the main supply system healthy.
3. Step up voltage was used to Transmit the power to very long distance w/o higher transmission loss.
4. Because of Static device it operating efficiency is 98% compare to any electrical device.
5. Easy control & voltage adjustment.
Transformers can convert power at one voltage into power at another voltage.
Electrical power needs to be at a high voltage for transmission over distances, but must be transformed to a lower voltage for use in the home.
Transformer is an electrical device that makes the transfer of energy by forming inductive coupling between the winding of its circuits. Transformers are basically of two type's i.e; Step up transformer and step down transformer. Sue the varying current flowing through the primary winding creates a magnetic flux inside the core of the transformer and in secondary winding. A varying emf is produced in the secondary winding as a result of magnetic flux. The major usage of transformer is to either to vary relative voltage of the circuit or isolate it.
When you pass electricity through wires you warm the wires up. This heat is a total loss of energy. So you want to keep the loss to a minimum. The heating effect of electricity is increased with an increase in amperage (the current). The amount of power that goes through the wires is a function of the voltage x amps. So to transmit a certain amount of power with the minimum heat loss you keep the current down which mean pushing the voltage up. This is why the transmission wires near the generating station carry very high volatges. But these voltages are unsafe for use in domestic circuits so they have to be reduced by a series of transformers from the high volatges in the main lines to lower voltages at substations to even lower voltages in the home.
CommentThe main reasons for transmitting energy at high voltages is because, for any given load, the higher the supply voltage, the lower the load current (I = P/V). Low load currents are necessary to (1) reduce otherwise-enormous voltage drops, (2) minimise the necessary cross-sectional area of the conductors in order to minimise their weight and, of course, cost. (3) The 'energy loss' advantage, described in the above answers, is a secondary advantage and not the primary reason!
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the Transformer depends up on the Voltage
transformer input Voltage 230 V . out put volt depend upon the secondary winding of the coil with swg coil ( copper Thickness)
Ex
230 V input = step-up Transformer = above 230 v ( like 440 v, 1000v but same current)
230 V input = step-down Transformer = below 230 v ( like 3 ,6,9,12,24,110v, but same current)
They have a variety of uses. Here are some:
Lighting transformers are used to convert 120V to 12V.
yes we can place auto transformer in place of original transformer
Ideal transformer is useful in understanding the practical transformer..i does't have losses...
It is the current transformer core meant for metering.
If the bed lamps use a low voltage bulb then the type of transformer will be a step down transformer.
If these are the exact voltages that you need you will need an auto transformer to obtain these voltages. If these voltages are nominal voltages and are of a three phase four wire configuration, the 220 voltage can be obtained from the three phase legs to the neutral (ground) connection. The equation to use is 400/1.73 = 231 volts.
Frgi transformer
yes we can place auto transformer in place of original transformer
Ideal transformer is useful in understanding the practical transformer..i does't have losses...
why should we use pulse transformer rather than ordinary transformer
we cannot use transformer because transformer cannot change frequency . . .
It is used in where the transformer are connected in star delta.
500w iron core transformer .that kind of size
As long as the transformer is capable of 12 Volts DC output, you can use any transformer with HO scale equipment.
It is the current transformer core meant for metering.
If the bed lamps use a low voltage bulb then the type of transformer will be a step down transformer.
When transformer is used in step up mode then we can use transformer as amplifire
When transformer is used in step up mode then we can use transformer as amplifire