Transfer switch position sensing using coil control contacts
US6297640A · kind A · utility
34Cited by
1References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Apr 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/018
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for determining the position of the main contacts of an automatic transfer switch, without need for special position contacts, by monitoring for the presence of voltages at the normal source voltage contacts, the alternate source voltage contacts, the normal source coil control voltage contacts and the alternate source coil control voltage contacts of the automatic transfer switch, and providing an indication of switch position in response thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.