Circuit breakers and remote control miniature circuit breakers

Abstract

The invention provides a circuit breaker and a remote control miniature circuit breaker. The circuit breaker comprises a handle spring used for handle resetting. The hand spring is connected in series in one circuit loop of the circuit breaker. One end of the handle spring is connected with one end of the circuit loop. The moving end of the handle spring is contacted with and separated from the other end of the circuit loop along with the closing and separating action of the handle so as to realize connection and disconnection of the circuit loop. The scheme of applying the handle spring to the circuit loop can be used for a remote control miniature circuit breaker comprising an N-pole circuit breaking unit and a P-pole circuit breaking unit, and the handle spring of the N-pole circuit breaking unit or the P-pole circuit breaking unit is connected in series in the power loop of the control circuit board of the N-pole circuit breaking unit. The moving end of the original handle spring of the circuit breaker is configured as the structure of a moving contact end which is also used for performing connection and disconnection of the line so that the structure is simple, the design is ingenious, processing and assembling are easy and the circuit breaker has great economy.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances, and relates to a circuit breaker and a remote-controlled small circuit breaker. Background technique [0002] Remote control miniature circuit breaker is a commonly used type of miniature circuit breaker. It can be used in prepaid watt-hour meters for remote control. It is mainly used in industrial, commercial, high-rise and residential buildings. It has a remote control The existing shunt release and circuit boards, the existing remote control miniature circuit breakers mainly include 1P+N and 3P+N, of which the P-pole circuit breaker has overload and short-circuit protection functions, and the N-pole circuit breaker controls the on-off of the neutral line , the lock in the P-pole circuit breaker is linked with the lock in the N-pole circuit breaker through the connecting shaft. Through the electrical connection between the shunt release and the control circuit board, the remote...

AI Technical Summary

Problems solved by technology

However, due to the existence of arcs when the moving contacts break large currents (especially short-circuit currents), it poses a threat of ablation to the tiny steel wire ends, which can easily cause problems such as poor electrical contact and damage to the steel wire ends, and affect the quality of circuit breaker products. safety performance

Another existing improvement solution is to add an auxiliary switch. Since the existing components have basically filled the small space in the miniature circuit breaker housing, it is difficult to solve the above problems by adding additional devices to occupy and change the existing structure. This makes the structure of the circuit breaker more complex, often resulting in a larger workload for adaptive improvement of the original structure

Images