      IEVref: 131-12-51 ID: Language: en Status: Standard    Term: admittance Synonym1: complex admittance [Preferred]  Synonym2:  Synonym3:  Symbol: $\underset{_}{Y}$ Definition: for a passive linear two-terminal element of two-terminal circuit with terminals A and B under sinusoidal conditions, quotient of the phasor $\underset{_}{I}$ representing the electric current in the element or circuit by the phasor ${\underset{_}{U}}_{\text{A}\text{B}}$ representing the voltage (131-11-56) between the terminals $\underset{_}{Y}=\frac{\underset{_}{I}}{{\underset{_}{U}}_{\text{A}\text{B}}}$ where the sinusoidal electric current represented by the phasor $\underset{_}{I}$ is taken positive if its direction is from A to B or negative if its direction is from B to A and where the sinusoidal voltage ${u}_{\mathrm{AB}}={v}_{\text{A}}-{v}_{\text{B}}$ represented by the phasor ${\underset{_}{U}}_{\text{A}\text{B}}$ is the difference of the electric potentials at terminals ${v}_{\text{A}}$ at A and ${v}_{\text{A}}$ at BNote 1 to entry: The admittance of an element or circuit is the inverse of its impedance. It is equal to ${v}_{\text{B}}$, where G is conductance for alternating current, B is susceptance, Y is apparent admittance, and φ is displacement angle. Note 2 to entry: The coherent SI unit of admittance is siemens, S. Publication date: 2013-08 Source: Replaces: Internal notes: 2017-06-02: Cleanup - Remove Attached Image 131-12-511.gif CO remarks: TC/SC remarks: VT remarks: Domain1: Domain2: Domain3: Domain4: Domain5: