Power Consumed

If v=220V, I=25A, power factor=0.8, frequency=400Hz. If the motor runs for 3 hours, What is the power consumed?

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rajasekar.k

  • Jan 26th, 2010
 

P = V*I*CosA

A is powerfactor
V is Volatage
I is Current

P = 220*25*0.8

P = 4400watts

Power P is 4.4Kwatts per one hour.

For 3 hrs = 4.4KW*3 

        ans  = 13.2KW

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Calculating power, frequency and time is not required.

P=V*I*Cos0
=220*25*0.8
=4400 watts answer

But if you are looking for "How much energy motor consumed?" then you need time

Energy consumed = P*T
= 4400 * 3
= 13200 Wh
= 13.2 kWh

Frequency is not at all needed.

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