Article
Article
Electrical energy measurement
Article By:
Hartwig, William H. Formerly, Department of Electrical Engineering, University of Texas, Austin, Texas.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.218350
The measurement of the integral, with respect to time, of the power in an electric circuit. The absolute unit of measurement of electrical energy is the joule, or the charge in coulombs times the potential difference in volts. The joule, however, is too small (1 watt-second) for commercial use, and the more commonly used unit is the watt-hour (3.6 × 103 joules). The most common measurement application is in the utility field. See also: Electrical units and standards
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