Electric Strength Test of a New and Aged XPLE-Insulated Power Cable: a Weibull Statistic Approach

A brand-new and accelerated aged XPLE-insulated power cable tested against electrical breakdown voltage. The voltage step-up to breakdown test used with 5 minutes voltage exposure on each step. The step size chosen equal to the rated phase to ground voltage. Statistical processing of both test results was performed to obtain the Weibull distribution parameters. A simple statistical processing method is proposed, which can be easily carried out manually without the need of dedicated software. Good coincidence of the proposed method with the standard statistical processing is demonstrated. The regularities of changes in the Weibull distribution parameters during cable aging are shown.