In the case of petrochemical area AC drive & AC motor is used where the speed variation is required. Why they are not Using DC drive & DC motors in such areas?

1 Answers  

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can we charge 3 ph power transformer delta-star wound with neutral grounded 6.6kV/415V from secondary side(415V) but with primary(6.6kV) open by dg,what are the disadvantages or losses.

1 Answers  

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what are the steps involved in generator load test?

0 Answers  

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Where we give genset o/p in home & industrial applications ?

1 Answers  

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If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

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L&T ACB C-POWER OF 800A FAULS TRIPING AT THE TIME OF 110KW MOTOR STARTS WITH EARTH FAULT RELEASE

1 Answers   Ambuja,

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what is difference between 5A and 100A CT constructional wise and operation?

1 Answers  

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What is the allowalable frequency variation in India and in US? Why there is the difference?

3 Answers  

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Why are cables rated for 40 KA for 0.25 Sec fault current rating?

0 Answers  

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wat system call?

0 Answers  

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Why is transformer a machine

1 Answers   Grasim,

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What are conduct on the testing in cf in ur site?

0 Answers  

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