Middle-high voltage circuit breaker capable of expelling products between isolated contacts

Abstract

The invention belongs to the field of circuit breakers, and particularly relates to a middle-high voltage circuit breaker capable of expelling products between isolation contacts, which comprises a bottom plate, a front cover is fixedly connected to the upper surface of the bottom plate, an adjusting switch is rotationally connected to the inner surface of the front cover, and a cover plate is fixedly connected to the back face of the front cover. According to the middle-high voltage circuit breaker with the product expelling function between the isolation contacts, through the arrangement of a two-stage closing mechanism, when the adjusting switch is toggled, an arc-shaped magnet drives an iron core to move, a vertical rod is driven by an insulating plate to move downwards, a lever pushes a connecting rod upwards, a movable arc-shaped plate is separated from a fixed arc-shaped plate, and a power inlet end of a power outlet wire stops power transmission; as the surface areas of the fixed cambered plate and the movable cambered plate are very large, when the two plates slide relatively, the generation of induced current is reduced by increasing the contact area, and the problem that electric sparks are easily generated due to the induced current when a traditional contact type circuit breaker is opened and closed due to the small contact area of a contact is solved.

Description

technical field [0001] The invention belongs to the field of circuit breakers, in particular to a medium and high-voltage circuit breaker capable of driving off products between isolated contacts. Background technique [0002] The circuit breaker is an important switchgear in the power system. The circuit breaker can connect and cut off the load current of the electrical equipment during normal operation, and can reliably cut off the short-circuit current when the system fails. Circuit breakers are generally composed of moving contacts, static contacts, arc extinguishing devices, operating mechanisms and insulating brackets. In order to realize the automatic control of the circuit breaker, there is an auxiliary contact linked with the transmission shaft of the circuit breaker in the operating mechanism. [0003] Traditional circuit breakers are mostly used in high-voltage situations. At the moment of opening and closing, they are used to induce current, and extremely high t...

AI Technical Summary

Problems solved by technology

[0003] Traditional circuit breakers are mostly used in high-voltage situations. At the moment of opening and closing, they are used to induce current, and extremely high temperatures will be generated between the contacts. High-temperature and high-voltage electric sparks will oxidize and harden the metal on the contact surface. Oxide will splash around and finally stick to the surface inside the device, which will shorten the service life of the device, and in severe cases, it will cause a fire due to the high temperature of the circuit

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