Answer / karan kumar goyal

Transformers: It is an electrical equipment used for
stepping up/down the voltage level for transmission as well
as distribution.

Power Factor: The cosine of angle between voltage and
current is known as power factor. If the current lags
behind the voltage then it is called lagging P.F. If the
current leads the voltage then it is called leading P.F.

Machines: Equipments used for electromechinal conversion
are known as machines.

Answer / geetha

Transformer: is a static device it changes voltage (step
down/step up) with out changing any frequency ....

Answer / siva

three phase and single phase .

what is the clearance time circuit breakr?

1 Answers  

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How can I known multiplying factor .without multiplying table

0 Answers   Student,

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Why the rating of dc machine is in HP??/ Do reply guys..Its very important......

4 Answers   Apollo,

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how braking & making capacity of circuit breaker are calculated?

0 Answers   Bhel,

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One B.O.T Unit ??

10 Answers  

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what will happen if dc motor given ac supply

11 Answers   Mahaveer,

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please I wont know how to calculate the vector group for power transformer ZNyn11 best regard.

0 Answers   Al Rasikh,

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I have been using an 600VA with 0.6 p.f UPS with my desktop which has 450W power supply unit. Can anyone explain how can this happen . Because the output of the UPS is 360W (600*0.6) (<450W)

0 Answers  

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What the methode get earth resistance?

2 Answers  

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what is allowable current flows from phase to ground with out tripping the breaker

1 Answers  

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use of choke in APFC panels

2 Answers   Kemrock,

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what is the function of a commutator in a dc generator?

14 Answers   College School Exams Tests, NTPC, TCS,

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