how to identify vector group of three phase transformer by voltage method?

0 Answers   AAU,

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What happens to a line-frequency of high-frequency transformer when it is first energized/ re-energize?

0 Answers  

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how to use single phase supply for a three phase equipement.

0 Answers  

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1)What will happen when 240 VDC supply is connected to 240VAC supply(DC supply +ve is connected to phase of AC supply & DC supply is to neutral of AC supply). 2)Also what will happen when 240 VDC supply is connected to 240 VAC supply in reverse polarity as of Sr. No 1.

2 Answers  

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what is emitter follower configuration? and what are it's features?

1 Answers   IBM, TATA,

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without any excitation we can strt any dc or ac moter?

6 Answers   Bhel,

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what happens when you connect a.c and d.c supplies

1 Answers  

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what are the duties of commutator in motor and generator?

6 Answers   L&T,

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How to calculate phase to phase difference in 33KV Line ,11KV Line etc.

1 Answers  

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How to calculate & connection of 900KVA generator 2 sets & load(1500A)? How to choose cable size and ACB size for this load & generator? please explain me detail. Regards, Mr.Han

3 Answers   Powermec, TATA,

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the total iron closs in a transformer core at normal flux density was measured at 25hz and 5ohz and was found to be 250w and 800w respectively.the hysteresis loss at 50hz would be................?????

1 Answers   ABB,

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) why transformer cannot rotate though the principle behind induction motor is similar to a transformer

3 Answers  

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