Earth leakage circuit breaker with plug actuated resetting breaker
US4825329A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1987 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01R13/7135
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An earth leakage circuit breaker has a socket for connecting an appliance to be protected. A plug inserted in the socket depresses a plunger (34), tilting a cam (38) which acts through a striker (42) to momentarily close a relay, thus resetting the circuit breaker. When the appliance is unplugged the cam returns to its normal position, by-passing the striker (42) but closing a pair of test contacts. The reset and test functions are thus carried out without the need for separate buttons, and at times the load is disconnected, so that the circuit breaker contacts do not break load current when they open or close during resetting or testing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.