Answer Posted / satya dev

electrical test to be performed are as under.

1- Magnetic balance test.
2- Megnetising current test.
3- Turn to turn ratio test.
4- Vector group test
5- Knee point test
6- Winding ressistance test( Phase - Phase - Eatrh)
7- Meggering of bushing.
8- Tan Delta test.

All test must be performed after disconned to the
transformer from the Input & output supply.

In CTs tan delta point should be earthed , what is the reason behind it?

3019

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block diagram of 2 ups system connected in parallel mode?

2073

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how to calculate voltage drop and followed by cable calculation?is there avail in formula?

2051

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What will be the current drawn by HT motor, if low voltage is applied.. any formula to calculate the LT amps of HT motor.?

1444

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what is the meaning of neutral displacement ???

2737

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Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT? 

1958

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Starting current of a 10 HP induction Motor is ______ time’s full load current.

2923

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why and how voltage sharing in transformer, during magnetic balance test ?

2330

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how to calculate the lightning arrester conductor @ no of earth pits required

2115

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Is it possible to connect a safety device in to parallel?

2139

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I have c license but I don't know eligibility of Max Kilo Volts under the electrical licensing board.

1688

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there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit

1921

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How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.

1805

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How many types of probe used in cro?

1205

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What is bridge rectifier and explain with details

1912

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