Patent ID: 9087664
Filing Date: 2015-07-21
Classification: H01H

Abstract:
1. A circuit breaker, comprising: a tank; a stationary portion provided at one side within the tank; and a movable portion provided at the other side within the tank to move while facing the stationary portion so as to conduct or block a current through the operation of being brought into contact with or separated from the stationary portion, wherein the movable portion comprises: a puffer cylinder configured to temporarily store a compressible fluid; a moving main contact assembled to an end of the puffer cylinder to have an accommodation space in the moving main contact; and a moving nozzle inserted into the moving main contact, and wherein the moving main contact comprises a plurality of internal protrusions protruded in a radial direction and separated in a circumferential direction from an inner surface of the moving main contact, and the moving nozzle comprises a plurality of external protrusions protruded in a radial direction and separated in a circumferential direction on an external surface of moving nozzle, and wherein the internal and external protrusions are alternately disposed to each other along the circumferential direction, and the internal and external protrusions are coupled to the puffer cylinder, respectively, by a fastening member.