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The Watt is the basic unit of electrical power. It has nothing to do with time. 1 kilowatt is 1000 watts. The conversion between electrical power and mechanical power is: 1 HP = 746 watts (0.746 kw). So it only takes 373 watts (0.373 kw) to run a 1/2 hp motor at the rated hp for as long as you want. Now, if you are wanting to know the amount of energy consumed by running this motor for 1 hour, simply multiply the 0.373 kw by 1 hour and you will see that it consumes .373 kwh (electrical energy is time-related, electrical power is not). Hope this helps...

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13y ago
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13y ago

This answer will only be an approximation due to missing exact values. 1 HP = 746 watts. 30 x 746 = 22380 watts. or 22.38 kWs.

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Q: How many kilowatts does it take to run a thirty horsepower motor for one hour?
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