Modularized electronic tripping device for low-voltage breaker

The invention discloses a modularized electronic tripping device for a low-voltage breaker. A mutual inductor is arranged in a groove of an mutual inductor bracket; the groove is opened on the upper wall of the mutual inductor bracket; the side wall of the mutual inductor bracket is provided with a positioning hole which is communicated with the groove; an insulating piece is positioned in the positioning hole and passes through the mutual inductor; a circuit board and an executing element are respectively arranged on a circuit board and executing element bracket; and the circuit board and executing element bracket is buckled to the upper part of the mutual inductor bracket to form a modularized overall structure. By using the modularized electronic tripping device, the overall assembly and the overall detection of the electronic tripping device are realized; and during assembly, an electronic tripping device module is integrally arranged in a base of the breaker and the base saves a plurality of limiting cha