IEVref: 141-03-11 ID: Language: en Status: Standard Term: active power, Synonym1: Synonym2: Synonym3: Symbol: P Definition: for a polyphase line mean value, taken over one period, of the instantaneous power NOTE – For a three-phase line under symmetric and sinusoidal conditions, the active power is $P=UI\sqrt{3}\text{\hspace{0.17em}}\text{cos}\text{\hspace{0.17em}}\varphi$, where U is the RMS value of any line-to-line voltage, I is the RMS value of any line current and ϕ is the displacement angle between any line-to-neutral voltage and the corresponding line current. Publication date: 2004-08 Source: Replaces: Internal notes: 2017-02-28: rms replaced by RMS (x2). () replaced by < > in specific use. JGO 2017-06-02: Cleanup - Remove Attached Image 141-03-11.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: