Electric leakage circuit breaker

Abstract

The invention provides an electric leakage circuit breaker, which comprises an L-phase pole module, an N-phase pole module, a reclosing pole module and an electric leakage protection module, wherein an L-pole handle structure and an L-pole operating mechanism are arranged between the L-pole wire inlet terminal and the L-pole wire outlet terminal of the L-phase pole module, an L-pole moving contact of an L-pole contact mechanism is connected to the L-pole operating mechanism, a current transformer is arranged between the L-pole moving contact and the L-pole wire inlet terminal, a connecting conducting wire connected between the L-pole moving contact and the L-pole wire inlet terminal penetrates through the current transformer, the current transformer is connected with the circuit board of the reclosing pole module and used for feeding back current signals of a main circuit, and when overload occurs, the controller of the circuit board drives the reclosing pole module to act to realize automatic opening. According to the invention, the current sensor senses the overload current to enable the reclosing pole module to act to realize the opening of the circuit breaker, and the circuit breaker has the advantages of quick action, stable performance and high detection precision.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a leakage circuit breaker. Background technique [0002] Low-voltage circuit breakers, also known as automatic air switches or automatic air circuit breakers, can be used to distribute electric energy and protect circuits and power supply equipment from overload and short circuit, and can also be used for infrequent switching of circuits and infrequent starting of motors. At present, the mainstream low-voltage circuit breakers on the market are generally composed of a contact system, an arc extinguishing system, an operating mechanism, a bimetallic strip, and a short-circuit release. When the power circuit where the low-voltage circuit breaker is located is overloaded, the bimetal sheet is bent and deformed by heat to make the operating mechanism act, causing the low-voltage circuit breaker to trip instantaneously. When overload occurs, it trips in time, and the stability is poor, and the de...

AI Technical Summary

Problems solved by technology

When the power circuit where the low-voltage circuit breaker is located is overloaded, the bimetal sheet is bent and deformed by heat to make the operating mechanism act, causing the low-voltage circuit breaker to trip instantaneously. Timely trip when overload occurs, and the stability is poor, and the detection accuracy is low

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