Load-dependent preventive fuse
US6133819A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1997 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Apr 21, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C7/045
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A load-dependent, preventive fuse with an electronic ceramic (12) in a housing (11) from which connection leads (14) are led outwards to detect at least a first type of load to which a device to be monitored is subjected, in which fuse use is made of a ceramic material, hereinafter referred to as TDR ceramic (12), whose electrically insulating state changes as a function of time, being the first type of load, and as a function of a second type of load, to a semiconducting state, and as a result thereof, when a dc voltage U is applied to the TDR ceramic (12) via connection leads (14) an increase in current forms the activation criterion for the fuse, which criterion is fulfilled under predeterminable conditions and determines a desired operating time .tau..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.