Overvoltage protection means
US7564668B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Apr 21, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T4/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An overvoltage protection device for use in power supply, especially low voltage systems, is described, with a housing (2), a first electrode (3), at least one second electrode (4), an arc chamber (5) within the housing (2) between the two electrodes (3, 4), and with a breakdown spark gap between the two electrodes (3, 4), an arc forming between the electrodes (3, 4) when the breakdown spark gap is ignited. In order to more reliably prevent the occurrence of a grid follow current and re-ignition of the breakdown spark gap in the overvoltage protection device, at least one outflow and cooling channel (6) is formed in the housing (2) through which the hot plasma from the arc chamber (5) can emerge, the outflow and cooling channel (6) extending in the lengthwise direction of the housing (2) and being helical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.