Electromagnetic trip for an electrical apparatus for protection
US5894257A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1997 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Sep 19, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/2481
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electromagnetic trip for an electrical switch apparatus for protecting against short circuits, including a magnetic yoke (20), a tubular non-magnetic coil form (40) with axis X-X', open at both ends (42, 43), a control coil (50) wound around the form (40), a fixed core (60) and a movable core (70) which are housed in the respective ends (42, 43) of the form (40), the movable core (70) having an upper end (72) projecting outside the form (40), characterized in that the form (40), the coil (50), the fixed core (60) and the movable core (70) constitute a pre-assembled electromagnetic sub-assembly (10) intended to be introduced into the magnetic yoke (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.