Switching contact arrangement of a low voltage circuit breaker with main contacts, intermediate contact and arcing contacts

US6689979B1 · kind B1 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Michael Bach · Kildeer, US
• Detlev Schmidt · Berlin, DE
• Michael Sebekow · Berlin, DE
• Guenter Seidler-Stahl · Berlin, DE
• Ingo Thiede · Berlin, DE
• Sezai Tuerkmen · Berlin, DE

Key dates

• Filing date: Apr 17, 2002
• Grant date: Feb 10, 2004
• Expiry date: May 22, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H9/383
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A switching contact arrangement for a low-voltage power circuit breaker includes a switching contact arrangement with a stationary contact group and a movable contact group which interacts with it. The contact groups include interacting main contacts, as well as interacting intermediate contacts and consumable contacts. Furthermore, both contact groups are equipped with an arcing horn for passing a switching arc to an arc quenching chamber. The consumable contacts are integrated in the arcing horns. Only the main contacts are in the form of contact facings, while the other contact points are formed by the busbars or arcing horns. The switching contact arrangement is of a single design and achieves a longer mechanical and electrical life. Furthermore, particularly short switching times are achieved.