Electrical current limiting fuse with bound sand filler and improved low current fault clearing
US4028655A · kind A · utility
7Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1975 |
| Grant date | Jun 7, 1977 |
| Priority date | — |
| Expiry date | Oct 9, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H85/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high voltage current limiting fuse of the type including a bound silica sand filler has a fusible element provided with evenly spaced perforations along its major length. In the region of the center of the fuse, a segment of the element is provided with additional perforations. At least one of the perforations in the segment has a lead-tin alloy overlay directly adjacent its perimeter which, in conjunction with the additional perforations, lowers the low current clearing level of the fuse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.