Dreiphasenwechselstrom

Description: In Power engineering, three-phase current refers to the linking of three individual currents each at a fixed phase shift angle of 120°. It is produced by a generator equipped with three windings offset by 120°, which in turn generate three sinusoidal voltages (${{V}_{1}}$,${{V}_{2}}$ and ${{V}_{3}}$) with phasing that differs by 120° in each case. There are two different voltages in three-phase current systems. Measuring the voltage between two phase conductors delivers the phase-to-phase (or line-to-line) voltage (${{V}_{12}}$,${{V}_{13}}$,${{V}_{23}}$). In the low-voltage range, this is typically (with the exception of the USA and Canada) 400 V at a frequency of 50 Hz. The voltage between a phase Conductor and ground - the phase (or line-to-ground) voltage (${{V}_{1}}$, ${{V}_{2}}$,${{V}_{3}}$) - is lower than the phase-to-phase voltage by the factor$\sqrt 3$.