Auxiliary switch for indicating the condition of a circuit-interrupting device
US4250476A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1979 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Nov 13, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/0066
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An indicator is disclosed for a high voltage circuit interrupter having a stored-energy mechanism for biasing the contacts open. The interrupter has a shunt trip mechanism to open the contacts in response to either circuit conditions or a remote command, and a manual mechanism to trip the store-energy mechanism and to recharge and reset the store-energy mechanism. The indicator mimics the operation of the circuit interrupter and provide three signals indicating that the contacts are closed and the manual mechanism are between home and trip position, that the contacts open and the manual mechanism is either in the home or trip position, and that the contacts are open and the manual mechanism is between the trip and reset position or at the reset position. The indicators are preferably two lights with either light on or with both lights out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.