Abstract:A significant number of minimum-oil breakers has been installed in HV substations and distribution cabinets of regional network operator Stedin. E.g. 35% of all bays in HV stations. Eaton, the successor to the original manufacturers Coq and Hazemeyer intended to end the support of these breakers in 2014. The paper describes the ensuing risk evaluation, options and two-track approach chosen by Stedin to manage the risk: 1. Replacement of switchgear within a period of 20 years, 2. Conservation of the 10 -25kV sw… Show more
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