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KWHITE
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Join Date: Nov 2012
Posts: 1

Electric Energy

11/14/2012 4:51 PM

How do you calculate Hp to kilowatt hrs based on a 3ph 480vac 5hp motor just a rough estimate.
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lyn
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#1

Re: Electric energy

11/14/2012 4:59 PM

I'd use an on-line calculator, like this:

How do you convert 1 HP motor to Kwh usage
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JRaef
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United States - Member - New Member Engineering Fields - Power Engineering - New Member

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#2

Re: Electric Energy

11/14/2012 6:43 PM

746 watts per HP

Watts x Hours = WH

WH x 1000 = kWH

But just so you fully understand, the HP rating of the motor is relatively meaningless if you are trying to determine energy use. The motor will only consume what it NEEDS to consume to perform the work expected of it. So if the LOAD connected to that 5HP motor is only 2HP, calculating kWH based on 5HP is not going to serve you well. Bottom line, you need to actually measure.

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Joshi
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#4
In reply to #2

Re: Electric Energy

11/15/2012 3:10 AM

WH x 1000 = kWH ? Bit confused.

Should it be: kWH = WH / 1000 ?
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

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#3

Re: Electric Energy

11/14/2012 10:04 PM

If fully loaded and 0.93 efficiency, very close to 4 KW (or 4 KWH per hour).

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Anonymous Poster #1
#5

Re: Electric Energy

11/15/2012 7:36 AM

5hp motor=3.75kw motor

Greetings
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