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kilowatt·hour

 
Measures and Units: kilowatt·hour

energy. Symbol kWh, properly kW·h. For a steady current, identically the product of power in kilowatts and time in hours, used particularly as a measure of electric energy consumed, = 3.6 MJ. See r.m.s. re alternating current.

UK 1882 The ‘energy contained in a current of one thousand amperes flowing under an electromotive force of one volt during one hour’, called also Board of Trade unit, and at one time the kelvin.

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Measures and Units. A Dictionary of Weights, Measures, and Units. Copyright © Donald Fenna 2002, 2004. All rights reserved.  Read more