Patent ID: 9324519
Filing Date: 2016-04-26
CPC Classification: H01H

Claim Text:
1. A low-voltage switching device comprising a plurality of arc-extinguishing chambers, wherein each of the arc-extinguishing chambers encloses a contacting unit including a stationary contact and a movable contact and arcs are formed when the movable contact is disconnected to the stationary contact, each of the arc-extinguishing chamber comprising a plurality of U-shaped arc-extinguishing plates arranged for splitting, guiding and cooling the arc formed between the contacts and sidewalls provided with guiding means for guiding the arms of the arc-extinguishing plates, wherein the guiding means comprises a plurality of supporting plates, characterized in that the supporting plates are arranged protruding towards interior of the arc-extinguishing chamber for receiving the arms of the arc-extinguishing plates and for providing electrical isolation between arms of two adjacent arc-extinguishing plates and, each of the supporting plates is longer and wider than each of the arms of an arc-distinguishing plate.