Answer / neha koul

The ac mains supply we get in our homes are not constant, this is variable i.e the frequency goes up and down, if we directly use the ac mains power many of our home elctrical appliances may get damaged, so we need a transformer which transforms the voltage and make it constant at some specific value due to electromagnetic induction and time varying magnetic field. The specific value of transformer depends on us that what value we want to give by stepping it up or stepping it down.

Answer / kumar.m

We need transformers for using step down / step up voltage.
and eddy current lossing .

how much cable size required for 70 kilowatt load.

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What is the maximum No. of out going mccbs permitted from an LV distribution paqnel? What is the ampere relation between incomer and out going switch gears/mccbs?

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We have .ht motor which is 60Hz.we run on 50Hz.so that it's speed reduce but we had one prob.that motor winding temp increase up to 135 deg.we want reduce this temp.what to do?we arrange ext.cooling fan but not much effect.we want reduce this temp. Inhouse without affecting much.cost. also don't want reWINDING OF MOTOR?

3 Answers  

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How to calculate the efficiency of Turbo Generator(Alternator) in general....?

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which type of motor is suitable for water pump?

1 Answers   IIM,

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advantages and disadvantages of inverse definite minimum time RELAY

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When one of three series resistors is removed from a circuit and the circuit is reconnected, the current

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what is elcb

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what happen if field of dc shunt motor opens? what is function of putting res. in parallel to one phase of 3 phase IM? the power supplied by 5A source in circuit is given by------Watt.

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What is knee point voltage?

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IN TWO WATTMETER METHOD WE GOT W1,W2,WE KNOW V.HOW TO FIND Q????????????

7 Answers   APTransco,

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