What is a dc motor?

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WHAT IS THE COOLANTS IN TRANSFORMER?

7 Answers   Bhel,

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if field winding of synchronous generator are shorted on each other will it start or burn or run for short time like induction motor

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Why Transformer does not work in DC ?

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How the soft starter control the starting current in three phase squirrel cage AC Motor?

1 Answers  

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A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.

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What is auto changeover and how it works plz write details.

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Why does curving the pole faces in a dc machine contributes to a smoother dc output voltage from it?

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difference between local breaker backup relay or backup protection relay ?

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Hi,iam a diploma in electrical engineering.rtd from indian air force in apr 2007.prsently working in reliance next link as a network maintenance engineer since 2007,can i get a job in motherson sumi.

0 Answers   Motherson, Motherson Molds and Diecasting Ltd.,

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WHY WE CAN GENERATE POWER IN 3PHASE MODE ONLY NOT IN 4 OR 5PHASE

18 Answers  

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how is the connection of a 3 phase ct trivector meter done on a pole mounted transformer

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