Answer / k.prakashchandra

EFR is usually set at 20 % of OCR.The earth fault current
is V/ Z of the line + ER value of the support.But you can
not expect this calculated earth fault current.

when we have to use UPF wattmeter and LPF wattmeter? what is the difference between UPF and LPF wattmeter in terms of construction?

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how does the harmonics enter into the induction motors?

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why the earth conductor in top of the tranmission line ?

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Why 60Hz frequency is used in America what are all the benifits?

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I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

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what is mean by descripiency relay? & wht is its ansi code?

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How can find thermal state value in relay for calculate thermal overload.

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How to determine the Power factor is Leading,Lagging & Unity ?.I don'thave any Meters.

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how to calculate the step resistance for slipring induction motor,how you deside the no of step for that?

0 Answers   ABB, Visa,

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i applied for the ap transco please forward the freqventley asked QA

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what is ACB and its function?

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when ur using single phase type of load for a 3.5core power cable .Why neutral is .5 and how much current in the neutral if we consider neutral as a reverse path for three phases.

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