Patent · US Active

Puffer circuit breaker with an overpressure valve

US7820933B2 · kind B2 · utility

3Cited by

2References

19Claims

0Family size

Assignee

ABB TECHNOLOGY AG · CH

Inventors

Helmut Heiermeier · Waldshut-Tiengen, DE
Kurt Kammerl · Grießen, DE
Timo Kehr · Birrhard, CH
Stephan Grob · Baden, CH

Key dates

Filing date	May 15, 2007
Grant date	Oct 26, 2010
Priority date	—
Expiry date	Aug 24, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH01H2033/908
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A circuit breaker comprises a puffer volume (9) and at least one overpressure valve (16) for discharging gas from the puffer volume (9), if the pressure therein exceeds a given threshold. The overpressure valve (16) is formed by a piston (17) and a spring (19) as well as by a cavity (18) in the stationary support body (10) of the moveable contact assembly (2). The overpressure valve (16) is of compact and simple design, has low hysteresis and large cross-section.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.