# Root mean square of phase-to-phase voltage

## Description

In mathematics, the root mean square , also known as the quadratic mean, is a statistical measure of the magnitude of a varying quantity. In a balanced three-phase power supply system , three conductors each carry an alternating current of the same frequency and voltage relative to a common reference but with a phase difference of one third the period; hence the voltage on any conductor reaches its peak at one third of a cycle after one of the other conductors and one third of a cycle before the third conductor. From any of the three conductors, the peak voltage on the other two conductors is delayed by one third and two thirds of one cycle respectively.

Related formulas## Variables

V_{ph} | Phase-to-phase voltage (V) |

V_{peak} | Peak value voltage (amplitude) (V) |