• 专利标题:   Method for manufacturing arcing contacts for electrical switching devices, involves forming arcing contact from contact material powder on contact carrier using directed energy deposition.
  • 专利号:   EP3971929-A1
  • 发明人:   JOHANSSON E
  • 专利权人:   ABB SCHWEIZ AG
  • 国际专利分类:   H01H001/0237, H01H001/027, H01H011/04
  • 专利详细信息:   EP3971929-A1 23 Mar 2022 H01H-001/027 202226 Pages: 20 English
  • 申请详细信息:   EP3971929-A1 EP197504 22 Sep 2020
  • 优先权号:   EP197504

▎ 摘  要

NOVELTY - The method involves Arcing contacts are manufactured by providing (S102) a contact material powder comprising of a metal material powder, graphene and functionalized graphene. An arcing contact is formed (S104) from the powder on a contact carrier using directed energy deposition. The contact is manufactured directly on the carrier using the deposition. Forming the contact comprises forming a first arcing layer with a first concentration of graphene or its functionalized in the powder, and subsequently forming a second arcing layers with a second concentration. The concentration is varied during forming of the contact to form the contact. USE - Method for manufacturing arcing contacts for an electrical switching device i.e. low voltage breakers. Can also be used for contactors. ADVANTAGE - The method enables manufacturing an arcing contact of various shapes to improve performance of the arcing contacts, so that rounded corners can reduce risk of an arc getting stuck in a corner or leaving a contact area, thus improving thermal properties and reducing risk of contact welding, and hence improving performance of an electrical switching device. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for an arcing contact element for electrical switching device. DESCRIPTION OF DRAWING(S) - The drawing shows a flow-chart of method for manufacturing an arcing contact. Step for providing a contact material powder (S102) Step for forming an arcing contact (S104)