Internal pressure diagnostic of vacuum circuit breaker based on the phenomenon of chopping current

This article presents one of the methods proposed in the literature for examining the status of the vacuum by measuring the chopping current. This phenomenon was studied in a chamber with a pressure control where chopped AC and DC currents were measured. A method of statistical analysis of arcing time and chopped current based on Weibull distribution was developed. The results give rise to a continuation of its practical application.