Self-restoring type current limiting device
US4024488A · kind A · utility
1Cited by
9References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Dec 17, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H87/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
One electrode is rigidly fitted into a hollow metallic cylinder and the other electrode is coaxially fixed within the cylinder through a cylindrical insulation. An insulating disc is opposite to the cylindrical insulation to form them an annular arrow gap between them. The gap is filled with a self-restoring type current limiting material to normally form a current passageway between both electrodes. The current limiting material is caused to be first evaporated in a narrower portion of the gap in response to a flow of overcurrent through it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.