Why we use CT on differant phases of 2ph.PT detection for brush-less static excitation of 3ph.,400v Synchronous Generator? What happen if use CT on same one of VT phase?

2 Answers   Hydropower,

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Why P.f. of the system decreases when it is connectect across induction motor? & how to maintain the p.f. of system to unity.?

6 Answers   Reliance,

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A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?

0 Answers  

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What does VVVF stands for in VVVF drive ? How does it differ from VVF drive?

8 Answers   HAL,

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Where we can use 3.5c cables instead of 4c cables.Why?

4 Answers  

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Acually generator neutral is earthed,if suppose cable from neutral is brokened under theearth ,what will happen.

2 Answers   L&T,

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determine two methods to find loose connection in operational electrical system?

0 Answers  

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We have a 33/11kv switchyard having 12.5 MVA power transformer. We export & import power through this transformer. When we export power, the PF will be depend on GRID PF & when we import power the PF will be depend on our load PF. but the problem is that,when neither we export nor import but our 33KV vCB is in close position,our meter read the power factor 0.14 to 0.25 at that moment. So how can be we improve the power factor at that moment.

3 Answers  

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what type of oil is used in transformers? a)conduting b) insulating

25 Answers   ABB, LGS,

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What is the importance of quality factor in resonance?

3 Answers  

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xplain in detail d pr. of synchronous motors? why syn. generators r used for the production of electricity?

4 Answers  

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What is the make of breakers, transformers, generators? What are their capacities and ratings?

4 Answers   Bharat Bijlee, GHPPL, Tata Motors,

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