Shaft Assembly For Molded Case Circuit Breaker

Abstract

The present invention provides a shaft assembly for a molded case circuit breaker, wherein the shaft assembly has high phase insulation and minimum volume. The shaft assembly comprises the following components: a rotatable shaft in which a plurality of separated shaft parts are connected among adjacent shaft parts with gaps; a plurality of connecting rods which are inserted into the shaft and can rotate along with the rotation of the shaft in a same direction, wherein the plurality of connecting rods are equipped to correspond with the shaft part and are used for driving a movable contact of each phase of the molded case circuit breaker for switching; and electric insulation members which are filled in the gaps among the adjacent shaft parts so as to cause phase insulation of the plurality of shaft parts.

Description

technical field [0001] The present invention relates to a molded case circuit breaker, and more particularly to one capable of transmitting the driving force of a switching mechanism of the molded case circuit breaker so as to drive movable contacts of a plurality of phases simultaneously and capable of minimizing the leakage of arc pressure through an opening portion The shaft assembly, the opening part allows the penetration of the connecting rod with high phase-to-phase insulation performance. Background technique [0002] A molded case circuit breaker is an electrical device connected to a circuit (power line), which is used to detect the occurrence of electrical overload or short circuit of the circuit to automatically disconnect the circuit to protect the circuit and the load device. Therefore, combining image 3 , the molded case circuit breaker 100 includes terminal parts 60a and 60b, contact parts 1 and 2, switching mechanism 10, tripping mechanism 20 and arc exting...

AI Technical Summary

Problems solved by technology

[0014] However, due to the formation of the large opening portion, during the tripping operation, in image 3 Part of the arc generated between the contacts between the fixed contact 2 and the movable contact 1 leaks through the corresponding opening part, so that the molded case circuit breaker cannot guarantee high fault current breaking performance

Images