Residual-current circuit breaker

Abstract

The invention discloses a residual-current circuit breaker. The residual-current circuit breaker comprises an outer shell body, wherein a middle partition plate is arranged in an inner cavity of the outer shell body, the inner cavity of the outer shell body is divided into a left concave cavity and a right concave cavity through the middle partition plate, the left concave cavity is symmetrical to the right concave cavity in a bilateral mode, an electric leakage detection system is arranged in the left concave cavity, and a breaker tripping mechanism is arranged in the right concave cavity. The residual-current circuit breaker is characterized in that an electric leakage protection tripping mechanism which is connected with the electric leakage detection system is further arranged in the left concave cavity, and the electric leakage protection tripping mechanism comprises an electric leakage protection handle, an electric leakage protection jump buckle, an electric leakage protection lock catch, an electric leakage protection moving contact, an electric leakage protection fixed contact, an electric leakage protection electromagnetic coil and an electric leakage protection ejector rod. Due to the adoption of the structure, the residual-current circuit breaker is more reasonable in structure, safer to use and capable of greatly improving a rated current.

Description

technical field [0001] The invention relates to a leakage circuit breaker. Background technique [0002] The leakage circuit breaker is actually a circuit breaker with leakage protection function. The leakage circuit breaker includes a circuit breaker tripping mechanism and a leakage detection system, but the existing leakage detection system is to trip the circuit breaker through a connecting rod. The moving contact of the circuit breaker in the mechanism remains connected, that is, after the leakage detection system detects the leakage of the circuit, it drives the moving contact of the circuit breaker through the connecting rod, and then realizes the breaking and tripping through the tripping mechanism of the circuit breaker, so that the indirect breaking and tripping The buckle method makes the contact pressure of the dynamic and static contacts of the circuit breaker too small, which will easily cause a high internal temperature rise of the circuit breaker when the circ...

AI Technical Summary

Problems solved by technology

[0002] The leakage circuit breaker is actually a circuit breaker with leakage protection function. The leakage circuit breaker includes a circuit breaker tripping mechanism and a leakage detection system, but the existing leakage detection system is to trip the circuit breaker through a connecting rod. The moving contact of the circuit breaker in the mechanism remains connected, that is, after the leakage detection system detects the leakage of the circuit, it drives the moving contact of the circuit breaker through the connecting rod, and then realizes the breaking and tripping through the tripping mechanism of the circuit breaker, so that the indirect breaking and tripping The buckle method makes the contact pressure of the dynamic and static contacts of the circuit breaker too small, and it is easy to cause a high internal temperature rise of the circuit breaker when the circuit breaker is tripped, which easily causes the internal components of the circuit breaker to be burned when the circuit breaker is broken.

Images