Residual-current circuit breaker

Abstract

The invention relates to a residual-current circuit breaker. The circuit breaker comprises a shell, a handle, a wire outlet end, a wire inlet end, an indication button, an electromagnetic system, an L-pole arc extinguishing cover and an electric leakage circuit board and further comprises an L-pole operating mechanism and an N-pole operating mechanism which are arranged in the shell; a power taking mechanism, wherein the power taking mechanism is used for supplying power between a magnet yoke and an electric leakage circuit board on the electromagnetic system, and the power taking mechanism comprises a control piece which is arranged on the handle and used for controlling connection and disconnection between the magnet yoke and the electric leakage circuit board; a tripping mechanism, wherein the tripping mechanism comprises a voltage tripper and a tripping rod rotationally arranged in the shell, and an ejector rod on the voltage tripper pushes the tripping rod to move so as to drive a linkage piece on an operating piece to move, and the tripping rod is further provided with an elastic piece used for driving the tripping rod to rotate towards the linkage piece and driving an indication button to move upwards; and an N-pole arc extinguishing device. The circuit breaker is advantaged in that arc extinguishing can be conducted on the N pole, the arc extinguishing effect is good, the tripping effect is better, and when the circuit breaker is disconnected, the load end does not have the feeling of electric shock.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a leakage circuit breaker. Background technique [0002] Leakage circuit breaker is a switch that can automatically operate when the leakage current in the circuit exceeds a predetermined value. A switching device that turns on, carries a certain time and breaks current. It has been widely used in all levels of outgoing lines and terminal systems of power distribution systems in industrial fields, construction fields, water conservancy and hydropower and other fields. [0003] The circuit breaker is mainly composed of shell, handle, operating mechanism, contact system, zero-sequence current transformer, leakage test tripping mechanism and arc extinguishing system. The handle drives the moving contacts and static contacts in the contact system to move, so as to realize the connection and breaking of the circuit breaker, realize the control of the electrical circuit, and...

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to solve the problems in the prior art that the N-pole arc extinguishing, the tripping effect is not good and the circuit board is directly connected to the load end, and there is an electric shock feeling when touching the load end, and it is mistakenly believed that the switch is not broken. open defects, thus providing an earth leakage circuit breaker

Images