Integral magnetic trip and latch for a circuit interrupter
US3997857A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1975 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Sep 11, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit interrupter having a magnetic trip element which is integral with the latch. The disclosed circuit interrupter is provided with a bimetal and a magnetic trip element directly connected to the latch of the circuit interrupter which is drawn towards the bimetal, unlatching the circuit interrupter when current flow therethrough exceeds a high overload level. The disclosed circuit interrupter is particularly adaptable for use on a distribution transformer. A movable bridging contact for completing a series circuit between two stationary contacts is provided. The movable bridging contact is spring biased towards an open position separated from the stationary contacts, but with the circuit interrupter in the normally closed position is held in engagement with the stationary contacts by a latching mechanism which is responsive to the bimetal or magnetic trip element to allow the circuit breaker to trip open during overload conditions. The magnetic trip element is formed integral with the latching mechanism to reduce time delay before operation. A plurality of poles are operated using only one operating mechanism by connecting the elongated operating arms with a strong metallic m…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.