Patent ID: 8907804

Claim:
An alternating current contactor (AC contactor) with electronic short circuit self-locking function, comprising an AC contactor body, wherein said AC contactor body comprises a shell body, and a short circuit self-locking portion is provided inside said shell body, wherein said short circuit self-locking portion comprises: a current collecting unit for collecting current signals of phase lines; a short circuit detecting unit for obtaining a voltage signal which characterizes said current signals, comparing with a reference signal, and outputting a short circuit detecting signal when short circuit occurs; a short circuit self-locking executing unit for obtaining said short circuit detecting signal to trigger said AC contactor body to generate and maintain a circuit-breaking action; and a self-locking releasing unit for releasing self-locking of said AC contactor body and resetting said AC contactor body; wherein said AC contactor further comprises: an electromagnetic moving unit, multiple groups of on-off structures, wherein each said group of on-off structures is corresponding to a circuit and comprises: two static contact sheets respectively connected with one of said phase lines, and a movable contact sheet corresponding to said two static contact sheets and connected with said electromagnetic moving unit, wherein in an energized state, said electromagnetic moving unit drives said movable contact sheet to contact said two static contact sheets, so as to achieve closing the circuit where said electromagnetic moving unit is located.