Research on the Deterioration of Electrical Performance of Dropout Fuse

Abstract

Dropout fuses are widely used in distribution network of 10 kilovolts for their outstanding characteristics of simple structure and convenient maintenance. However problems occur after a period of usage. Three typical failure modes of dropout fuses used in coastal area are proposed, as well as the corresponding failure mechanisms. 50 decommissioned dropout fuses from Zhoushan power grid were tested in order to study the electrical performance deterioration of dropout fuses used in coastal area, with 50 new dropout fuses set for comparison. Temperature-rise test and contact resistance measurement were carried out to evaluate electrical performance of the dropout fuses.