Modular control power saving protector

The utility model relates to a modular control power saving protector. A mechanical control part is mainly composed of a fixed iron core (3), a trip coil (5), a moving core (7), a modular circuit board (19), a connecting rod (29), etc. The modular circuit board is arranged at the inner part of a bracket (23). A straight-rod connecting rod (29) is fixed on a clamping board or the iron core of an AC contactor by a screw nail. The functions of the loss voltage and undervoltage protection, the phase lacking protection, and the three-phase unbalance protection are added in a modular circuit. The utility model has the advantages of convenient use and maintenance, and safety, and the effect of power saving reaches 99.5%.