why do we need a 4th wire in 3phase 3wire transmission line

6 Answers  

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How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

0 Answers  

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What is the criteria for deciding whther fire wall is required between two power transformers

1 Answers  

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what is errection pcbs?

0 Answers  

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what is the use of Antipumping in HT breakers.

9 Answers  

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1. What does mean of "PS" stand for Diff. CT class? 2. What is the formula of KW for 1Phase load inturms of voltag,current & P.F.?

4 Answers   Hero Honda,

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what should be the ideal gauge of wire (In sq mm) for different loads in Ampere?

0 Answers  

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electricity board have asked me what size meter i need fitted in my garage, its a 415volt supply and i want to run six 20amp supplies tolifts and things plus ten florry lights , what kva meter do i need??

2 Answers   HCL,

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what is a relay?

31 Answers  

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difference b/w timer and counter

1 Answers  

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How to check VFD outgoing voltage

1 Answers  

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how will u exactly calculate the unit consumption of the Air conditioners?Split/Window/

3 Answers  

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