PROTECTOR FOR LOSS OF PHASE

The utility model discloses a protector for the loss of phase, belonging to the open-phase protecting device of motors. At present, accidents that motors are burnt out due to single-phase operations often occur, and accordingly, economic loss can be caused. The protector for the loss of phase comprises an electric magnet and a contact; the iron core of the electric magnet is wound with three coils in three layers, and only two normally closed auxiliary contacts are arranged in the contact. The utility model is a device which is connected in a circuit for protecting motors at the loss of phase.