PHASE The designation PH on the nameplate indicates whether the motor is single-phase (1)
or 3-phase (3). A single-phase circuit can be obtained from a 3-phase power system. If the
voltages match, then a single-phase motor can be operated from the 3-phase system. A
3-phase motor can be operated directly from a single-phase electrical system by using a device
called a phase converter to produce the third phase. Generally a 3-phase motor operated with
a variable frequency drive can be connected to either a single-phase supply or a 3-phase
supply