Patent ID: 8304677
Filing Date: 2012-11-06
Classification: H01H

Abstract:
1. A gas circuit breaker, comprising: a first arc contact and a second arc contact engaged with the first arc contact; a cylinder rod coupled with the first arc contact; and an insulating rod connected to the cylinder rod through a link mechanism in which an end thereof is connected to an operating mechanism, wherein the link mechanism is reduced in a length direction of the insulating rod to pull the cylinder rod to a side of the insulating rod when the insulating rod is moved apart from the cylinder rod, wherein the link mechanism comprises, a 4-bar link in which a pair of vertices facing each other are coupled with ends of the insulating rod and cylinder rod respectively, and the remaining vertices of the 4-bar link are inserted into a pair of guide grooves formed within a case accommodating the link mechanism respectively, and a gap between the pair of guide grooves is formed such that the side of the insulating rod is larger than the side of the cylinder rod.