Mention the disadvantages of low power factor? How can it be improved?

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ELECTRICAL MACHINE

2 Answers   Bhel, HPC, NHPC,

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What are the factors which influence the choice of specific magnetic and electric loadings of a synchronous machine?

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How to know the back up time for a 5KVA UPS which is connected to 15 nos. of computers? Is there any formula for this? pls. tell me.

1 Answers   HAL,

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some ac motor's direction get change dueto ghanging input to the ac drives.(say ryb to rby). but some motor direction remains the same when phase sequence is changed fromdive side. can anybody guide me?

1 Answers  

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If the field winding of the dc shunt motor is removed then what will happen to the motor ? will it turn or not

2 Answers  

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how hydrogen or helium is a cooling agent for alternator./ generator of big size.

1 Answers  

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HAI,I HAVE 6,60KW MOTOR FEEDERS IN MY MCC PANEL.HOW CAN I DO MY SETTINGS FOR OVERLOAD,SHORTCIRCUIT,GROUNGFAULT,INSTANTANEOUS TRIP FUNCTION IN MY 4000A CIRCUIT BREAKER?

1 Answers  

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What are the types of power in electrical power?

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will a fluorescent bulb work when dc is passed through it?? if not why??

4 Answers   TCS,

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For a 500 MVA 400/220/33KV transformer following data given HV power = 500 MVA IV power = 500 MVA LV power = 5 MVA If input power is 500 MVA then how output power is (500+5)MVA. Can anyone help

1 Answers   MEIL,

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what is difference between isolation and ultra isolation transformer?, what is the method of testing ?

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