Answer Posted / rvg.msceb

The earthing resistance indicates the easiness of providing
a path. It should be as low as possible. Different
countries having standard values. In india, for commertial
applications its <1 ohm, and for railway its< 0.5 ohm.
for air craft and ships temp. earthing <10 ohm.etc.

how line turns ratio changes in 3 phase with change in connection

1987

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Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?

2170

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what is the prinsiple of dc motor and construction and working ,application of dc motor.

1960

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what is servo motor and how it works?

2295

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If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?

2103

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Please send 110 kv sb station full single line drawing(sld)

2473

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What is a signal flow graph?

1080

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What are m circles?

1111

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i am trying to PSUs/govermeant jobs since last 2 years but still i m not success, plz help me.

1944

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Whether power factor should be high or low? Why?

1121

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How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?

2236

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what are the factors to be considered while design the breaker either HT or LT??

1923

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WHY IL=IPH IN STAR AND WHY IPH=IL/1.732 IN DELTA? WHAT IS REASON BEHIND IT?

6359

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Can clean earth cable be considered as low current cable

1967

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We have a couple of oil tanks at our plant. One of them does not have a lightning arrester installed. My question is it necessary to install an arrestor on every tank or will this particular one be covered by the arrestor installed on the ajdacent tank, Since all the tanks are close to each other. Basically, I want to know that if these arrestors or protection works in a parituclar area of effect or influence. Thanks

2055

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