High-voltage circuit breaker

Abstract

The invention discloses a high-voltage circuit breaker, and relates to the technical field of electrical equipment. The high-voltage circuit breaker comprises a base and a main rotation shaft. The main rotation shaft is hingedly arranged in the base. A number of static contacts are arranged on the base. A number of movable contacts are arranged on the main rotation shaft. The movable contacts are rotatably connected with the static contacts. The high-voltage circuit breaker further comprises a zero sequence current transformer and an electric shock prevention device, wherein the zero sequence current transformer and the electric shock prevention device are arranged in the base. A current sensor, a PLC module and a driving circuit board are arranged in the electric shock prevention device. The zero sequence current transformer is connected with the current sensor. The high-voltage circuit breaker further comprises a release. One end of the release is electrically connected with the driving circuit board, and the other end is connected with the main rotation shaft. When electric shock occurs, the current value of the zero sequence current transformer is not zero. The current sensor senses the current value, and transmits information to the PLC module. The PLC module stimulates the driving circuit board to stimulate the release. The release drives the main rotation shaft to rotate, so that the movable contacts and the static contacts are separated to realize open circuit. The high-voltage circuit breaker provided by the invention has the advantages of high sensitivity and electric shock prevention performance, and improved safety and practicability.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a high-voltage circuit breaker. Background technique [0002] A high-voltage circuit breaker is a switching device dedicated to turning on or off a high-voltage circuit. It can not only turn on and off the high-voltage circuit under normal conditions, but also cut off the high-voltage circuit when a short-circuit fault occurs. It plays a control role in the high-voltage circuit and is one of the important electrical components in the high-voltage circuit. The breaking capacity of high-voltage circuit breakers can be made very high in the manufacturing process, mainly relying on current transformers and secondary equipment for protection. [0003] At present, the high-voltage circuit breakers on the market have a low service life due to the use of general materials and no good protective measures or protective materials on the surface of the shell. Moreover, due to ...

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Problems solved by technology

[0003] At present, the high-voltage circuit breakers on the market have a low service life due to the use of general materials and no good protective measures or protective materials on the surface of the shell.

Moreover, due to the high-voltage operation of the user, the sensitivity of ordinary circuit breakers is low, resulting in low anti-shock performance, and the insulation material is general, which often brings certain safety hazards to operators and has low practicability.

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