Answer / sithathur ramamoorthy

Transformer copper loss is depend the current and iron loss
is depend the voltage. in depend the difference between
current to voltage. thats it.

Answer / dpk_1fj

Because we don't know what type of load going to be connect

Answer / chad

KW=1.732* V*I*cos@
KVA=1.732*V*I

We can see the equation the kw is change by load,but kva power is not change by load.thats is

Answer / deepak

tx o/p limited by heating hence losses
and losses depend apn V, I only not on load pf
so rating in volt-amp.not in watt.watt mean active
powr depend apn pf also

diffrence between windings of high tension side and low tension side of transformer

1 Answers  

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we can use airconditioner for cooling the winding of transformer ,if not why?

3 Answers  

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What is reactance? what is the function in Auto transformer and why high leakage reactance?

1 Answers  

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If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these

0 Answers  

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15hp,380v,31amp,3-ph submersible motor run at 250v what is The temperature rise of submersible motor

1 Answers  

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Why the ceiling fan rotate in anticlock wise direction whereas tables fan rotates at clock wise direction?

3 Answers  

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while calculating the power absorbed by a resistor connected to the output of a half wave rectifier circuit should we use rms or average current? explain with reason.

1 Answers   Vedanta,

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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what do you mean by power factor ? in new view

3 Answers   BDL,

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how to carry out Magnetizing Current Test on Distribution transformer and what purpose we are doing this test. why transformer rating in always in KVA ? what ispositive, negative, zero sequence impedence? How ElCB tripping if Neutral touch with ground Why AC & DC capacitor are use in UPS ? why motor rating in KW? how to syncronize two dg sets

0 Answers  

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What is the technical formula to calculate the load taken by a motor in Amperes ?

2 Answers  

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which relay is used on long transmission lines

10 Answers   ABB, Bhel, Student, Tata Steel Limited,

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