Direct current load breaking contact point constitution and switching mechanism therewith
US6934134B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2003 |
| Grant date | Aug 23, 2005 |
| Priority date | — |
| Expiry date | Dec 29, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H1/02376
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention intends to provide a direct current load breaking contact point constitution that can make and break an electrical circuit under both direct current loads of direct current resistance load and direct current inductance load over a long period of time without causing problems such as {circle around (1)} the conduction defect due to the consumption of the contact point, {circle around (2)} the locking due to material transfer from one contact point to the other contact point, {circle around (3)} the welding between the contact points, and {circle around (4)} the abnormal arc continuation, and a direct current load breaking switching mechanism such as a relay, a switch and so on that has the contact point constitution. The direct current load breaking contact point constitution according to the invention comprises a movable contact point and a stationary contact point that face each other; wherein the movable contact point is made of AgSnO2In2O3 alloy that contains at least Ag, 8 to 15% by weight in total of metal oxides including SnO2 and In2O3, 6 to 10% by weight of SnO2 and 1 to 5% by weight of In2O3; the stationary contact point is made of AgZnO alloy that contains a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.