Answer / rams dharavath

The direction and magnitude flux of d.c coil remaining the same.DC coils give accurates and better lifting magnets and DC coils having no hystrises losses and heating problems.

Answer / kannan

While we will use ac supply for HV and Relays following
disadvantages are available.

1.Tripping feedback can not see.
2.ac source is variable source.

Whats the purpose of neutral earthing?

5 Answers   Electrical, Hindalco, TCS,

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why three phase system is not preferred in aircrafts power cckts if yes than explain reasons?

3 Answers  

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what is the difference between effective earthing and resistive earthing?

3 Answers   REL,

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What is Wlak Test in Fire Alarm System????

2 Answers   Emerson,

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What does the temperature (30 deg or 35 deg celcius) mark on conservator of transformer indicates?

2 Answers   MahaGenco,

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How to Measure A.C Resistance for Earthing ?

2 Answers  

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What is the difference between sensitive earth fault and restricted earth fault in power transformers?

4 Answers  

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how much UPS neutral erath leakage current.

0 Answers   HP,

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what is XLPE type cable

8 Answers   Areva,

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What is the use of 1:1 isolation t/f in any circuit...?

3 Answers  

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what is the meaning of DY-11 Z-5%

1 Answers  

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What will be the minimum megger value of 1700 KVA Transformer? a) Do megger value varies according to climate conditions and area . b) If megger value is 100 mega ohm is it good for new transfomer. Explain?

4 Answers  

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