Fault current interrupter and explosive disconnector for surge arrester
US4734823A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1985 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Nov 1, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fault current interrupting disconnector, or fault disconnector, for a surge arrester operates to separate an electrical lead or ground lead wire from a damaged arrester and to interrupt the current flowing through the damaged arrester. The new fault disconnector includes an explosive charge, a tube of ablative material in a surrounding housing which co-acts with the tube to form a venting chamber, and a conductor extending through a portion of the chamber and through the tube. Excessive current heats and explodes the charge. The explosion pulls the conductor from an elongate connection, through the chamber portion and on through the tube; whereby arcing is first delayed, then is initiated in the chamber and then is drawn into and extinguished within the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.