what is the operating principle of contactor(power).along with disection?

3 Answers   NASA, Tech Mahindra,

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how can we understand that where we have to use ac or dc coil for solenoid valve and why?what is the different between coil of ac and dc explain please.

0 Answers   TK Group,

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what is the working principle of energy saver control panel. please give the complete calculation & theory.

0 Answers   Lupin,

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Why ferranti effect occurred in leading p.f load?

1 Answers  

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what is the difference between MCB and MCCB?

4 Answers  

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what will hapen if secodery circuit is open of current transformer

8 Answers   KPTCL,

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How is the percentage impedence of a transformer fixed at design stage???

0 Answers  

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How to identify Motor leads in their order coming out from winding without tag (U1, V1, W1 & U2, V2, W2)?

6 Answers   ABB,

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Relay setting for earth fault of reciprocating and centrifugal compressor motor feeder.Setting will be different or same?

1 Answers   Reliance,

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Which type of questions well asked. ?

0 Answers  

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what is the KVA formula of a three phase transformer

5 Answers  

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What is the purpose of stablization resistor in high impedance bus bar protection

0 Answers   Jindal,

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