Patent ID: 8232496
Filing Date: 2012-07-31
Classification: H01H

Abstract:
1. A switch disconnector comprising: a main contact point and an arc interruption contact point, of which the main contact point opens before the arc interruption contact point during a disconnection operation and is closed after the arc interruption contact point during connection; a stationary and a moving contact-piece arrangement, with the stationary contact-piece arrangement having a pot contact piece with contact fingers and with the moving main contact point having a blowing cylinder, a contact cylinder which is connected to a contact mount, and with the arc interruption point having a contact pin as the stationary contact piece and an annular contact piece formed as a nozzle as the moving contact piece, wherein the contact pin has a section composed of interruption-resistant material, whose external diameter is greater than the external diameter of the rest of the pin area, and wherein the contact pin has at least one slot which runs in the longitudinal direction and splits the pin into at least two pin fingers, and wherein the nozzle is connected to an inner surface of the contact cylinder and has an inner contour for engaging the contact pin of the stationary contact, the contact cylinder is connected to the contact mount via a plate, the blowing cylinder is connected to an end of the contact cylinder opposite the plate, and an interior area of the moving contact-piece arrangement is located between the plate and nozzle and configured to flow gas away from the nozzle to an area below the plate.