An on-line monitoring device for mechanical characteristics of vacuum circuit breaker

Abstract

The invention discloses an online monitoring device for the mechanical characteristics of a vacuum circuit breaker, which is installed inside the vacuum circuit breaker. The vacuum circuit breaker has a vacuum bubble, an insulating pull rod, a connecting rod and an operating mechanism. The insulating pull rod is connected to the lower end of the vacuum bubble, and It is connected with the operating mechanism through a connecting rod, and the operating mechanism is also connected with an energy storage spring; the online monitoring device includes a force sensor, a signal conditioning module, a data processing module and a communication module, and the force sensor is arranged on an insulating pull rod or a connecting rod, The input end of the signal conditioning module is connected with the output end of the force sensor, the input end of the data processing module is connected with the output end of the signal conditioning module, and the input end of the communication module is connected with the output end of the data processing module. The invention can obtain mechanical characteristic parameters such as opening time, closing time, contact pressure and overtravel, that is, has the effect of comprehensive monitoring; the invention can also avoid hidden dangers caused by insulation problems.

Description

technical field [0001] The invention relates to the technical field of on-line detection of electric power equipment, and more specifically relates to an on-line monitoring device which uses a force sensor to monitor the mechanical characteristics of a vacuum circuit breaker. Background technique [0002] In power system installations, vacuum circuit breakers are important power equipment, and have the characteristics of huge quantity, heavy maintenance and high cost. According to relevant statistics, more than half of the substation maintenance costs are spent on high-voltage circuit breakers, and 60% of them are used for minor repairs and routine maintenance of circuit breakers. In the past, the mechanical characteristic inspection of vacuum circuit breakers was mainly carried out regularly during the power outage period of the equipment in conjunction with maintenance, so as to replace parts and perform mechanical characteristic inspection of the operating mechanism. [...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an online monitoring device for the mechanical characteristics of vacuum circuit breakers, so as to solve the problem of the lack of sensors in the prior art and the inability to monitor the contact pressure parameters at the same time

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