why dc supply given to ac alternator rotor

3 Answers  

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why do we carry out winding resistance test?

0 Answers   MahaGenco, MAHINDRA,

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Explain using drawings what is reverse PID action w.r.t PID controllers.

0 Answers   L&T,

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What is the function of electron gun used in crt?

0 Answers  

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want to know about DMRC

4 Answers  

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Why ELCB trip, when neutral touch with ground?

1 Answers  

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LT, CC and LMU installed at both the outgoing circuits of 132 kv double ckt transmissio what its means ? and what are there use ?

1 Answers  

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I have two PLC processors. I want to communicate both processor with each other. How i can do so?

0 Answers   IHG InterContinental Hotels Group,

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three owners X, Y, z owned some tractors with them, on the first month x gave away the same amount of tractors to y and z ( as much as they possed), similarly in the 2nd month y gave of to x and z similarly by third month z gave to x and y. after this all X, Y, Z had 24 tractors each.

2 Answers   econ,

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why ct ratio always rated 5.

1 Answers  

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Why do we generate 3 Phase AC Supply? It is possible to generate 4 Phase and 5 Phase explain it?

4 Answers  

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Any one can explain if there is any harm from humming noise heard from air circuit breaker : we have 415 switch board having two incomers from transformers 3.3KV/415V , when bus coupler closed, and open one ACB incomer to work in one of the transformers, the current started hunting around 50 Amps, and heard humming noise from the air circuit breaker, although the load current was only 1200 amps while the ACB capacity is 2500 Amps, and the transformer 1600 KVA. The same didn't happen when taken the other transformer offline. Why this humming noise and current fluctuation? is there any implication or danger, bearing in mind that we just returned everything back to normal and stopped the maintenance of the transformer. Shall we go ahead and ignore this noise?

6 Answers  

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