Electrical Switching Device, in Particular High-Voltage Circuit Breaker, with a Housing

摘要

An electric switchgear has a housing which surrounds an interrupter unit. Post insulators are provided so as to support the interrupter unit in an insulated manner. The post insulators are fitted with a capacitive coating which homogenizes the voltage distribution along the post insulators. Additionally, the capacitive coatings can be used to dampen a traveling voltage wave incoming during an interruption of a short-line fault and thus increase the short-circuit breaking capacity of the electric switchgear.