IEVref: 103-02-03 ID: Language: en Status: Standard Term: RMS value, Synonym1: root-mean-square value, Synonym2: effective value Synonym3: Symbol: Definition: for a time-dependent quantity, positive square root of the mean value of the square of the quantity taken over a given time intervalNote 1 to entry: The root-mean-square value of a periodic quantity is usually taken over an integration interval the range of which is the period multiplied by a natural number. Note 2 to entry: For a sinusoidal quantity $a\left(t\right)=\stackrel{^}{A}\mathrm{cos}\left(\omega \text{\hspace{0.17em}}t+{\vartheta }_{0}\right)$, the root-mean-square value is ${A}_{\text{eff}}=\stackrel{^}{A}/\sqrt{2}$. Note 3 to entry: The root-mean-square value of a quantity may be denoted by adding one of the subscripts eff or rms to the symbol of the quantity. Note 4 to entry: In electrical technology, the root-mean-square values of electric current $i\left(t\right)$ and voltage $u\left(t\right)$ are usually denoted I and U, respectively.Note 5 to entry: The abbreviation RMS was formerly denoted as r.m.s. or rms, but these notations are now deprecated. Publication date: 2017-07 Source: Replaces: 103-02-03:2009-12 Internal notes: CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: