High-or medium-tension compressed-gas circuit breaker taking circuit-breaking energy from the arc
US4880946A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Jul 21, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H33/903
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high- or medium-tension compressed gas circuit breaker taking circuit-breaking energy from the arc, the circuit breaker being of the type comprising: PA1 a fixed assembly including main contacts (8a) and arc contacts (21a); PA1 a moving assembly including main contacts (26) and arc contacts (25); PA1 a blast volume (VI) including a piston (12) which moves on contact separation and urges compressed gas through a blast nozzle (7) which opens over the zone where a main arc forms when the arc contacts separate, and PA1 a set of auxiliary contacts (22a, 21c) in series with the arc contacts for creating an auxiliary arc in the volume (V2) situated behind the piston, PA1 the circuit breaker further including means (23, 24) for allowing the auxiliary contacts to separate only when the pressure in the blast zone reaches a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.