NEMA C12.24 TR
NEMA C1224 TR 2011-JAN-01 Defntons for Calculatons of VA VAh VAR and VARh for Poly-Phase Electrcty Meters
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This technical report establishes names and mathematical definitions for the Volt-Ampere (VA), Volt-Ampere hours (VAh), Volt-Amperes Reactive (VAR), and Volt-Ampere Reactive hours (VARh) formulae used by poly-phase electricity meters. The mathematical definitions assume static waveforms.