what is the difference between arc and spark

2 Answers  

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What happen if field ckt is open when a sailent pole alternator connected to infinite bus

3 Answers   Bhel, Nilkamal,

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How to control speed of DC motor with AC power?

7 Answers   vguard,

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in star connected 4wired transmission system ,what happen if the neutral is grounded . or not grounded. which is significant and y

2 Answers  

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How the size of transformer decreases if we increases the frequency?

2 Answers  

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Can the same motor be operated in both direction ?

12 Answers  

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can i use ups power as a raw power for another ups

0 Answers  

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i am using star-delta connections with reverse/forward direction motion of the 75hp induction motor.What should be the ratings of Main,Delta and Star contactors and why?

1 Answers  

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is it necessary for 200 kva transformer to have marshaling box and cu plate earthing for neutral

1 Answers   Blue Star,

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what is there inside an inverter and how it works?

0 Answers  

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where used of HVDS system.

3 Answers  

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enlist types of dc generator

8 Answers   Philips,

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