Power In A Three Phase Motor
Power In A Three Phase Motor |
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Power Factor = |
true power (watt meter) |
Apparent power (1.732 x E L x I L ) |
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Power = 1.732 x E x I x PF |
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Hp = |
Avg. Volts x Avg. Amps x PF x 1.732 |
746 |
A three phase motor is drawing an Avg. 480 V and an Avg of 68a at full load. A watt meter indicates a true power of 40.277 watts. What is the HP of this motor?
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Power Factor = |
40,277 = |
40,277 |
1.732 x 480 x 68 = |
56532.48 |
Power Factor =
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= .713
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Hp = |
480 x 68 x.713 x 1.712 |
746 |
Hp =
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= 54hp
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