Answer / sanjeet

due to residual magnetic present in the rotor core

Answer / gopaul

initially we need three phase supply from the grid for
excitation.we have to start the motor as a generator,and
then by using the external energy we have to increase the
speed of the motor above syn speed.after that it starts
working as a induction generator

Answer / mina adeeb

yes i agree, it generates power due to the residual flux
in the rotor but without excitation i can't get high power
because a small flux

why we commonly use delta star winding in power and distribution transformers

7 Answers  

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What will be MF for below rating ? Main CT PT value is 11kva/110 and 20/5 amp Meter display is 1kva/110v and -/5 amp What will be MF ? Multiplycity factor of energy meter

0 Answers  

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if transformer core is made of copper instead of steel which losses will increase..please explain

5 Answers   Bhel,

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how work the lighting arrestor?

2 Answers  

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purpose of breaker contact multiplication relay?

5 Answers   ABB,

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WHY IS CT SECONDARY SHORTED TOWRDS TH EQUIPMENT TO BE PROTECTED

1 Answers  

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What are RMU yard Safety Operating Procedures

2 Answers  

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What is the function of interposing current transformer?

0 Answers  

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static chagre

0 Answers  

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1 KVAR = 1.3Amps but, 25KVAR capacitor/690V capacitor takes just 21Amps as leading current, what is the reason? Please explain...

1 Answers  

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What is the field weakening mode of a ac motor?

1 Answers   L&T,

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why the rotor is outside in case of ceiling fan?

1 Answers   HCL,

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