Electric gas blast circuit breaker

US4354073A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ruediger Hess · Berlin, DE
• Heiner Marin · Berlin, DE

Key dates

• Filing date: Mar 3, 1980
• Grant date: Oct 12, 1982
• Expiry date: Mar 3, 2000

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H33/91
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An electric gas blast circuit breaker is disclosed which has two stationary contact pieces. A switching unit is movable between closed and open positions for electrically bridging the contact pieces in the closed position and for electrically disconnecting the contact pieces in the open position whereby an arc develops when the switching unit is moved to the open position. A gas blast device blasts a stream of gas through the arc when the switching unit is moved to the open position. The switching unit includes a supporting body and a slide-contact ring made of an arc-resistant material. The ring slideably contacts one of the contact pieces in the closed position and is mounted on the supporting body so as to be electrically insulated therefrom. A plurality of elongated contact elements are disposed in the supporting body for electrically connecting the contact pieces when the switching unit is in the closed position. There is provided an electrical connection between at least one of the contact elements and the slide-contact ring when the switching unit is in the closed position and also when it moves into the open position and continuously in all operating positions thereof.