can i have the methods of speed controls for 3 phase AC MOTORS.

7 Answers  

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what is a switchgear. what is its work & where it is used?

5 Answers  

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What is GND Transformer?

2 Answers  

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I am new guy as an electrical engr. in a 100MW HFO based power project. I am in operations division. I have noticed from last few days, my supervisor sends the last 24 hours energy generation calculation to my plant manager. I have noticed, he calculated last 24 hour's generated energy differences in KWH then he multiplied it with a multiplying factor 960. for example: total difference =2.685 KWH*960= 2577.6 MWH. but he does not not know what is multiplying factor 960?? can anybody explain it??

1 Answers   Orion,

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I have 90KW Motor 60 Hz,380V Pf 0,88. after testing the Motor without Load is the no load Current 36 A,but wenn i put load after 2 hours the current increase more than 156 A. Can anybode tell me waht is the Problem?

4 Answers   ABB,

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Why is ignitor used in sodium vapour lamp

1 Answers  

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if 50hz transformer is required to be run on 50% frequency what needs to be done???????????

6 Answers   century,

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Why we use shunt coil in breaker??????????

7 Answers  

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why do transformer humm ??????????

2 Answers  

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why do we use 25kv supply for traction purpose

1 Answers  

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what will happen if i will done heart shape hole in transformer core?

1 Answers   Bhel, ONGC,

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How many points does a Circuit can have?

0 Answers  

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