Device and method for live detection of vacuum degree in circuit breaker interrupter

Abstract

The invention relates to a circuit breaker arc extinguishing chamber vacuum degree live detection device and method, which belong to the technical field of power system electrical equipment defect detection. The device comprises a He-Ne laser, a silicon wafer, a first focusing device, a chopper, a second focusing device, a third focusing device, a first plane mirror, a second plane mirror, a fifthfocusing device, a fourth focusing device and a pyroelectric infrared probe. The detection device can realize normalization of vacuum degree maintenance of a vacuum circuit breaker, timely and reliably discovers potential safety hazards, ensures the safety of a system, and has the advantages of low price, high imaging speed, convenience in carrying, stable test and the like.

Description

technical field [0001] The invention belongs to the technical field of defect detection of electrical equipment in a power system, and in particular relates to a device and method for detecting vacuum degree of liveness in an arc extinguishing chamber of a circuit breaker. Background technique [0002] Vacuum circuit breakers use vacuum as the arc-extinguishing medium, which has the advantages of strong breaking capacity, long electrical life, no arc exposure and reliable operation. Compared with oil medium and SF6, the vacuum medium has no danger of fire and explosion. As the service life of the vacuum circuit breaker increases, the vacuum degree of the interrupter will decrease. Under the action of the electric field, the electrons and ions emitted by the moving contact and the static contact will collide with the gas molecules. The probability of collision increases, and the charged particles in the interrupter are sufficient For a long time, breakdown will be formed, it ...

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Problems solved by technology

[0003] The vacuum degree off-line detection method has the advantages of relatively simple detection equipment, high accuracy, high cost performance, good flexibility, and convenient operation. It has a wide range of applications in the field of vacuum degree detection, and the technology is mature. Inconvenience has become the most important factor restricting the development of this type of method

[0004] The electrified detection method of vacuum degree can detect the degree of vacuum in real time and detect the deterioration of the degree of vacuum in time, but the current method has problems such as low precision, high cost, poor anti-interference ability and stability, and most of them are limited to laboratory applications , has not been widely used

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