Answer / istiak

in measuring polarities of a transformer we use a very small
battery or dc supply voltage source.in that case,if we use
alternating current replace of D.C then we couldn't find
polarities because ac changes it's side within a few moment
and dc doesn't..................

Answer / k.prakashchandra

To create momentary magnetic field

how does ELR works? explain

0 Answers  

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how to test a motor from megger

5 Answers   JSW,

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Wat is meant by OLTC?

1 Answers  

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What is Synchronization of generator,where and how it is achieved.

1 Answers   HEC,

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state the functions of different parts of star delta starter.

1 Answers  

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In layman terms, what is the difference of Dielectric strength and dielectric constant when speaking of an insulating oil

0 Answers  

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what is demagnetising effect & crossmagnetising effect and how it is related to electrical system?is there any more effects are available or only these two??

1 Answers   Telco,

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What is Gnat,Ant,Rabbit &Dog overhead conductor? Please explain.

1 Answers  

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L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

0 Answers  

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Is reverse power relay of generator operate due to voltage variation problem? please clearify.

1 Answers   Birla,

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how to carried out DAR test in 11 KV Alternator ?

0 Answers  

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in single phase we get 220 volt and in three phase 4420 v why this second Ques= in case three phase star conection our neutrul becom disconect what happan 3 Q=== a three phase house load and have unbalce load on different pahse diffrent current eg phase a 7A b 8A c 5A and voltage is 440 than how calculate it total load in kw pl give formula thanks

8 Answers  

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