These three winding-mechanisms simultaneously operate with a key'once a week to power the clock.
2.
Shown above is the \ alpha \ beta \ gamma transform as applied to three symmetrical currents flowing through three windings separated by 120 physical degrees.
3.
There are two common electrical winding configurations; the delta configuration connects three windings to each other ( series circuits ) in a triangle-like circuit, and power is applied at each of the connections.
4.
In the four-wire three-phase system, sometimes called " four-wire wye ", the safety ground is connected to a neutral wire that is physically connected to the zero-voltage side of the three windings of the generator or transformer.