Accelerating aging of transmission line porcelain suspension insulators by autoclaving

Failure Trends of High-Voltage Porcelain Insulators Depending on the Constituents of the Porcelain

“…In this case, 10 samples were considered for studying the failure probability of the porcelain insulators. The Weibull distribution has the potential to provide an accurate failure analysis with a low number of samples (n < 20) [15][16][17][18][19][20][21]. Another advantage identified with Weibull analysis is that it provides a logical and effortless graphical plot of the required lifetime expectancy.…”

“…Further, the data was sorted in ascending order and a breakdown probability was assigned. A simple approximation used to calculate the probability of failure was used: Moreover, as discussed in articles, the correlation coefficient should be calculated to check the adequacy of the Weibull distribution [17][18][19][20][21]. Here, the correlation coefficient was calculated to be 0.64, 0.84, and 0.95 respectively, for the three samples A, B and C. The correlation coefficient was calculated using the built-in function in a spreadsheet.…”