ServiceAvailability Assessment ofMass-insulated Power Cablesby Means ofStatistical Analysis

Failure datatogether withthelength andtheagesof mass-insulated powercables thestill inservice ofaDutchutility areusedasinput forthestatistical analysis. Thechoice ofthe appropriate distribution depends onthegoodness offit tothedata. Thefitted statistical distribution gives therelation ofthenumber ofexpected failures perkilometer together withtheageofthe cable. Toseewhatcanbeexpected inthefuture thepopulation in service together withtheobtained failure ratecurveisused. This givesstatistical information regarding expected failures and critical connections. Theanalysis canhelptheasset managerto determine ifimmediate action hastobetaken tomeetthebusiness policy e.g. condition assessment, maintenance orreplacement, orif thecurrent policy fulfils theconditions.