Answer / sayanta ganguly

Out of all machines Power Transformer have highest
efficiency. Power Transformer is a Static Machine and its
efficiency is nearly 100% that means full efficiency. power
transformer generally operated at full load. Hence,
it is designed such that copper losses are minimal and
efficiency at maximum.

Answer / vimal baldaniya

ofcourse transformer but dry type transformer because it
has less losses compared to other type transformer.

How to calculate % Impedence?

3 Answers   ISRO,

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If we have to find the inductance of a dc shunt motor then by giving dc supply or ac supply and what is the reason for it. (this example is from "to determine the transfer function of a dc shunt motor ")

0 Answers  

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Recently we had experienced following problem All RCCB breakers (connected to the load as well as spares) connected to various UPS systems at various floors at a high rise building tripped during a power break down and upon starting up of generator.This Generator is recently inducted into the installation. Can any one explain the reason behind this tripping. Regards Viswanathan

1 Answers  

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what is on line transformer and off line transformer.

3 Answers   Cisco, HP, ICC,

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List few applications of d.c series motor?

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If a 1.5V,3W torch light bulb is connected in series with a 15HP/11.19KW,230V single phase motor and the combination is connected against a 230V supply and switched on than what will happen keeping all other parameters as it should be A)the bulb will glow normally B)the bulb will not glow C)the bulb will glow with extra brightness D)the bulb will burn out and if a fuse is connected to the above circuit will something happen to the fuse and what about the single phase motor will it be affected? Please explain with derivation

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on what factor insulation resistance depends

2 Answers   Uttam Sugar,

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how to make an earthing certificate

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what is the minimum bdv value for 400 kva transformer?

2 Answers  

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How to calculate the rating of ELCB OR RCCB for an equipment?

2 Answers  

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hello! can anyone explain to me how a 3 speeds table fan work? what are the factors that are controlling the speed of a normal table fan? Is it by varying the voltage or changing the magnetic field? would appreciate your reply :) thx in advance.

2 Answers  

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Why does the rotor rotate?

1 Answers   Machino Polymers, OPTCL,

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