What is single phasing in three phase motors? All Questions › Category: Electrical Machines › What is single phasing in three phase motors? 0 Vote Up Vote Down CS Electrical And Electronics Staff asked 4 years ago I need short info 1 Answers 0 Vote Up Vote Down CS Electrical And Electronics Staff answered 4 years ago When a three-phase motor is supplied by three-phase supply the motor starts rotating, if suddenly one phase-cut down out of three-phase then a single phasing condition occurs.