Answer Posted / ugrasen

earth leakage relay monitoring the leakage current in mA
Earth fault relay operat on earth fault. It detects earth
fault whenever there is short in between phase and earth.

Why do we mostly prefer to generate and distribute electricity in 3 phase and not in 4 phase or 5 phase?

1208

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the winding of Generator and Motor is star or in delta ? and why

1110

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in 132kv substation CRT means

2621

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Is it acceptable of installing an earth pit in planters area where bare copper cable, earth rod and connection are susceptible to corrosion due to water?

1954

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Which motor connection is preferable star-delta or delta-star?

1082

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Which type of DG need Netral Earthing?

5304

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IF I KNOW THE AREA OF CROSS SECTION OFTHE WIRE , WATTAGE OF THE LOAD ,VOLTAGE SUPPLY WHAT IM GIVING TO THE LOAD AND ALSO POWER FACTOR OF LOAD ....... SO GIVE ME FOR WHAT AMOUNT OF CURRENT I SHOULD USE WHICH TYPE OF CABLE?

1896

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ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

2021

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PLEASE SEND THE PREVIOUS YEARS QUESTION PAPERS OF RRB JUNIOR ENGINEER-ELECTRICAL

1894

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how net resistance islow in star connection and viseversa in delta connection...? if anybody could explain in detail it wud be helpful.

1605

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What is the form name of 'c' license, I want to download in web

1895

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A cotter joint is generally used to transmit

1244

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what is the excess air in furnace

2043

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CAN CU XLPE/PVC CABLE BE USED INPLACE OF LOW NOISE SCREENED CABLE? KINDLY GIVE REASONS

1877

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what is circuit breaker in transfomer and where it used

1183

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