Current limiting device for an electric power system
US4184186A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1977 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Sep 6, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S174/17
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This current limiting device comprises a normally-closed source-side circuit interrupter, a normally-closed load-side circuit interrupter, an electrical conductor connected between the interrupters for connecting the interrupters in series, and a normally-open switch that can be closed to connect the conductor to ground via a low-impedance conductive path located electrically between the interrupters. A switch operator acts to rapidly close the switch in response to a fault on the power circuit extending through the series combination of interrupters, thereby connecting the conductor to ground through the switch. The switch operator closes the switch within 1/4 cycle of power frequency current after fault inception, thereby effecting current-limiting action with respect to current through the series combination of interrupters on the load side of the conductive path to ground. The interrupters are opened in response to the fault by the switch operator acting through a mechanical connection between the switch operator and the interrupters. Such interrupter-opening occurs sufficiently rapidly that the source-side interrupter interrupts the current therethrough at the first natural cu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.