Direct current circuit breaker.

摘要

A d.c. circuit breaker comprising in parallel with a circuit breaker section (5) a current commutating auxiliary circuit formed by a capacitance (6) and/or an inductance (3), wherein a gas mixture consisting essentially of an SF6 -gas and nitrogen or of an SF6 -gas and air is used as an arc-extinguishing and insulating medium for said breaker section (5).