Main circuit breaker
US4399420A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Sep 11, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/046
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The following specification describes a circuit breaker having a handle pivoted about an axis transverse to the axis of blade rotation for controlling an operating assembly to pivot a cam about an axis parallel to the blade axis to open or close the breaker contacts. The operating assembly is located in the center compartment of the breaker while the contacts and blades are located in end compartments of the breaker, and when the blades are moved past a predetermined position, they are then independently moved by a respective snap acting spring. Sensing means control the operating assembly in the event of a fault current to move to a trip position and open the contacts while providing a visual signal of the trip condition. Arc gases are vented to prevent engagement with the copper conductor connected to each contact and a stainless steel blade bracket is interposed between the movable contact and the copper blade to prevent an arc from contacting the copper blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.