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 .

who is ohm's and his law ?

1 Answers  

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Why 50hz and 60hz frequencies are used by the world, why they are not taking 55hz?

3 Answers  

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In Extended Delta transformer, by which method we can measure the extended angle of transformer?

1 Answers   Usha Martin,

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To prevent the mal operation of a differentially connected relay while energizing a transformer, the relay restraining coil is baised with (a)second harmonic current (b)fifth harmonic current (c)third harmonic current (d)seventh harmonic current

2 Answers  

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For an 100kw generator, only 50kw of load is connected. will the generator generate only 50kw or 100kw. if it generate 100kw what happens to rest of the 50kw. what happens if we connect more than 100kw of load?

8 Answers  

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If I need to purchase a step-down transformer (from three phase 33kV 50Hz to 400/230V), what additional information do I need from the main supply power line?

1 Answers   MahaDiscom,

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What is a advantage of Self Reset Lockout ? On Fault breaker get trip & fault no longer exist then self reset lockout how inform us?

0 Answers   Bhad Engineers,

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pls tell what are doing the three phase motor star and delta connetion with circuit diagram and control wiring .

0 Answers   Mukand,

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why induction motor speed is decress with increase in load? how synchronous motor speed is constant?

1 Answers  

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If there is unit power factor in a power house and a capacitor bank used in a factory at resistive load . In this case, will there leading power factor in power house across that factory.

2 Answers  

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why do we not use equivalent voltage source in negative sequence equivalent ckt.

0 Answers   TATA,

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How many types of AC current?

8 Answers  

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