Answer / dinesh kumar

Transformer is a satatic device which transform power from
one winding to another winding without change in frequency.

Answer / minal

In a power plant, the main transformer is called Generator
transformer.The input given to the main transformer has
delta connection. The output taken out from the secondary
windings of the transformer has star connections.

Answer / minal

Generator transformer is called main transformer.The output
of a generator is connected to a main transformer. It steps
up the the generating voltage.

Answer / ravi kant yadav

A transformer is a device that transfers electrical energy
from one circuit to another through inductively coupled
conductors—the transformer's coils. A varying current in
the first or primary winding creates a varying magnetic
flux in the transformer's core, and thus a varying magnetic
field through the secondary winding. This varying magnetic
field induces a varying electromotive force (EMF)
or "voltage" in the secondary winding. This effect is
called mutual induction.

If a load is connected to the secondary, an electric
current will flow in the secondary winding and electrical
energy will be transferred from the primary circuit through
the transformer to the load. In an ideal transformer, the
induced voltage in the secondary winding (VS) is in
proportion to the primary voltage (VP), and is given by the
ratio of the number of turns in the secondary (NS) to the
number of turns in the primary (NP) as follows:


By appropriate selection of the ratio of turns, a
transformer thus allows an alternating current (AC) voltage
to be "stepped up" by making NS greater than NP,
or "stepped down" by making NS less than NP.

In the vast majority of transformers, the windings are
coils wound around a ferromagnetic core, air-core
transformers being a notable exception.

Transformers range in size from a thumbnail-sized coupling
transformer hidden inside a stage microphone to huge units
weighing hundreds of tons used to interconnect portions of
power grids. All operate with the same basic principles,
although the range of designs is wide. While new
technologies have eliminated the need for transformers in
some electronic circuits, transformers are still found in
nearly all electronic devices designed for household
("mains") voltage. Transformers are essential for high
voltage power transmission, which makes long distance
transmission economically practical.

Answer / santoshkosuru

If a load is connected to the secondary, an electric
current will flow in the secondary winding and electrical
energy will be transferred from the primary circuit through
the transformer to the load. In an ideal transformer, the
induced voltage in the secondary winding (VS) is in
proportion to the primary voltage (VP), and is given by the
ratio of the number of turns in the secondary (NS) to the
number of turns in the primary

Answer / senthil .m

transformer means one winding to another winding to gives
without change in frequencey (primary to secondary winding)

Answer / ramendra shukla

A Device which tranform the electrical voltage form one
magnitude to another magnitude without changing the supplu
frequency is know as Transformer.
It does so by faraday`s Electromagnetic induction law.
A main x-mer is satuated at generating end the
output of Alternator is connected with this& then its
output is feeded for supply in Y-connection maaner.

tan delta test of current transformer.

3 Answers   NTPC,

why PT transformer primary r the grounded?

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What is the formula to calculate the rating of power cable for three phase current.

0 Answers  

what is cut out fuse?

1 Answers  

Why the resistance grounding (NGR) is better than Solid grounding?

5 Answers  

how to calculate the no. of earth pits required for an electrical installation?

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what is bus pt and what is the function of it

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10 hp motor ,7.5 kw ,960 rpm, full load current 15.5, delta connection so how much take current no load trial time. any formula please give..... second question :- what is different between brekar control wiring and motor starter control wiring

1 Answers   MSP,

11. As per the theory current doesn’t flows in Neutral, but practically it is not applicable, explain why? 12. How to take the Vector Group Test in Transformer? What is the purpose of doing Vector Group Test? 13. Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV, 20kV, 30kV? 14. Why do we generate 3 Phase AC Supply? It is possible to generate 4 Phase and 5 Phase explain it? 15. Explain why the Voltage drop will happen in 3 Phase line? 16. What is the equipment used to control the generator output? 17. What are the factors to be considered during the Synchronization? 18. What should be value of Circuit breaker operating time and tripping time? 19. Why the CT Secondary is rated as 5A generally? 20. At which time Synchronous generator act as a Synchronous Condenser?

1 Answers  

Who are the manufactures those manufacturing 3Cx2.5sqmm FRLS cables. I heard about FRLS technology adopted only in wires useful for wirings

0 Answers  

how induction generator generated the power without excition like syncronous generator.

3 Answers