Answer / venkata ramana

Three phase supply produce rotating magnetic field so three
motors are self starting so not required capacitors in three
phase motors.

what is static excitation and dynamic excitation of synchronous generator,scr excitation is a brush or brushless excitation?

6 Answers  

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Why dc voltage used to excite alternator field in stead of ac?

4 Answers  

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what is the difference b/w neutral and earth?what is the need of earthing and what are the different methods for earthing?

4 Answers   NTPC,

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hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites

0 Answers  

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When the load on the system is zero and Capacitor bank is on condition, is capacitor bank takes any load?

2 Answers  

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why we use circuit breakers for switching instead of normal switching device?

0 Answers  

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how does grading rings & spacers in transmission line works? Working Principle?

0 Answers  

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how to calculate the cable size for 500 kva transformer?

3 Answers  

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What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter

0 Answers   HCL,

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The purpose of a choke is to provide a ?

1 Answers  

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how can i get the formula to find out the cable size if i know the load of main fuse protection.

0 Answers  

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why core losses are affected with change in voltege in transformer?

1 Answers   HCL,

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