Indicating arrangement for indicating the condition of the switching contacts of a switching vessel in a vacuum-switch apparatus
US4007345A · kind A · utility
4Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1975 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | Jan 23, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H1/0015
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An indicating arrangement for indicating the condition of the switching contacts of a switching vessel is provided for a vacuum-switch apparatus having an actuator for opening and closing the switching contacts. The indicating arrangement includes a spring for pressing the switching contacts together when the actuator is actuated to close the contacts. The spring has a length corresponding to the closed position which is dependent upon the wear condition of the contacts. The changes of length of the spring are indicated as the switching contacts are worn from repeated switching operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.