Gas-insulated low- or medium-voltage switch with swirling device
US10727013B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2017 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jun 19, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2033/566
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A gas-insulated low- or medium-voltage switch for system voltages within 1 to 52 kV and for up to 2000 A rated current includes first and second contacts being movable in relation to each other along an axis of the switch and defining a quenching region in which an arc is formed during a current breaking operation; and an arc-extinguishing system for extinguishing the arc during the current breaking operation. The arc-extinguishing system may include a pressurization system with a puffer chamber, and a nozzle system connecting the pressurization system with the quenching region, the nozzle system having a nozzle at its outlet for blowing the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation; and a swirling device configured for generating a subsonic swirl flow of a quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system. The arc-extinguishing system further includes a swirling device configured for generating a subsonic swirl flow of a quenching gas onto the quenching region during the current breaking operation, wherein the sw…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.