Answer / roop kumar

To identify the phases in switch yard / line and to synchronize the system

why not feeling shock while touching rotor shaft of induction motor during running condition? during running condition emf induced in rotor.

1 Answers  

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why power factor is only cosine angle not sine angle?

2 Answers  

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sir, how to select the cable size, what is the parameters use ang what is the formulas use for this cable size calculations. please tell me.

4 Answers   ISRO, Power Grid,

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Stator of 3-phase IM has 3 slots per pole per phase. If supply frequency is 50 Hz, calculate the speed of rotating stator flux A 1000 rpm B 500 rpm C 1500 rpm D 1440 rpm

0 Answers  

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what mean by analog ,digital,numerical meters and relays? say the example?

0 Answers   ABB,

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What are the types of lighning arrestor protection system? how to choose that according to load?

2 Answers   SPL,

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what is the difference between relay and a contactor.

5 Answers   Siemens,

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i need bhel question papers.

5 Answers   Bhel,

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What is instrumental error?

0 Answers  

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when two gen set runing in parallel but thay have diffrent pole pitch, then what will be happan

0 Answers  

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How to select AC3 duty contactor for DOL & Star-Delta starters

1 Answers  

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Differentiate between voltage and current feedback in amplifiers?

0 Answers  

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