Self-recovery type overvoltage and undervoltage protection circuit breaker

Abstract

The invention discloses a self-recovery type overvoltage and undervoltage protection circuit breaker. The circuit breaker comprises a shell, a circuit breaker base, an incoming line terminal arrangedon the power supply side of the circuit breaker base, a contact system arranged in the middle of the circuit breaker base, a switching mechanism for controlling the on-off of the contact system, a tripping mechanism for controlling the on-off of the contact system, and an outgoing line terminal arranged on the load side of the circuit breaker base, the switch mechanism comprises a handle operatingmechanism, a transmission rod connected with the handle operating mechanism and used for driving the handle operating mechanism to act, and a deflector rod connected with the tripping mechanism and used for driving the tripping mechanism to act; the transmission rod and the driving lever are both connected with a controller, and the controller comprises an actuating mechanism part and a control circuit part. The intelligent degree is high, frequent manual switching-on and switching-off work is not needed, and use is convenient and fast.

Description

technical field [0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a self-recovery overvoltage and undervoltage protection circuit breaker. Background technique [0002] In low-voltage AC power distribution lines, due to the failure of the neutral line, the potential shift will cause overvoltage or undervoltage of the single-phase line, threatening the lives of users and electrical equipment. Therefore, according to the JGJ242-2011 "Code for Electrical Design of Residential Buildings" issued by the Ministry of Housing and Urban-Rural Development in 2011, "each house should be equipped with self-recovery over-voltage and under-voltage protection appliances" to reduce the impact of over-voltage and under-voltage on electrical equipment. Cause failure or cause fire and other safety accidents. [0003] At present, the self-recovery overvoltage and undervoltage protectors with ordinary relay structure are generally used in the m...

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of product safety requirements, the current passed by the protector with the relay structure is relatively small, and the maximum current is generally about 40A. Serious, resulting in short life and high failure rate; in addition, when the protection is activated, it can only cut off the phase wire of the circuit, but not the neutral wire (zero wire). Therefore, there is still a risk of electric shock between the neutral wire (zero wire) and the ground

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