Intelligent vacuum circuit breaker

Abstract

The invention belongs to the field of circuit breakers, and particularly relates to an intelligent vacuum circuit breaker, which comprises an insulating holding plate, wherein a working table is inserted into the bottom end of the outer surface of the insulating holding plate, the back of the outer surface of the working table is fixedly connected with the front surface of the outer surface of the insulating holding plate, the bottom end of a vacuum pipe penetrates through the upper surface of the working table, the bottom end of the vacuum pipe penetrates through the front surface of the outer surface of the working table, the bottom end of the vacuum pipe extends out of the working table, and the upper portion of the outer surface of the vacuum pipe is sleeved with a clamp ring. According to the invention, when the circuit is short-circuited, the vacuum pipe tends to reset under the action of reactive force, and a clamping key cannot rotate anticlockwise, so that the vacuum pipe is prevented from resetting, impact force generated by the vacuum pipe is counteracted, vibration generated in the circuit breaker is effectively reduced, contact of contacts cut off by the vacuum pipe is reduced, free electric arcs generated in the vacuum pipe are reduced, the risk of contact burning or fusion welding is reduced, the circuit breaking effect of the circuit breaker is improved, and the service life of the circuit breaker is prolonged.

Description

technical field [0001] The invention belongs to the field of circuit breakers, in particular to an intelligent vacuum circuit breaker. Background technique [0002] Vacuum circuit breakers are named for their arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are high vacuum. They are widely used in distribution networks and can be used as protection for electrical equipment in industrial and mining enterprises, power plants, and substations. It is especially suitable for places requiring oil-free, less maintenance and frequent operation. The circuit breaker can be configured in central cabinets, double-layer cabinets, and fixed cabinets to control and protect high-voltage electrical equipment. [0003] Although the service life of existing circuit breakers is sufficient to meet the normal demand for electricity, in some areas with high demand for electricity, especially in summer, public places and residential electricity consumpti...

AI Technical Summary

Problems solved by technology

[0003] Although the service life of existing circuit breakers is sufficient to meet the normal demand for electricity, in some areas with high demand for electricity, especially in summer, public places and residential electricity consumption are greatly increased, and power short circuits often occur At this time, the circuit breaker automatically cuts off the circuit and stops the power supply to protect the circuit. Since the circuit breaker reacts quickly, the impact force generated by the internal vacuum tube is also relatively large during a short circuit. Under the influence of this vibration force, the elastic vibration will be carried out, and the free arc will be generated by repeated contact, which will cause the contacts to be easily burned or welded, which will make the breaking effect worse and reduce the service life of the circuit breaker

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