Circuit breaker having an encapsulated auxiliary coil assembly
US6414575B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2089/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit breaker which has an auxiliary coil fitted onto the primary bobbin adjacent the pole piece having a dielectric auxiliary bobbin and a dielectric bobbin housing encapsulating the auxiliary coil and forming an encapsulated auxiliary coil assembly. Both the dielectric auxiliary bobbin and the dielectric bobbin housing are comprised of a polymeric material, preferably a liquid-crystal polymer. Preferably, the liquid-crystal polymer is an aromatic liquid-crystal polyester which is reinforced with about 30% glass and has a nematic liquid-crystal structure. Furthermore, it is preferred for the dielectric strength of the liquid-crystal polymer to be about 32 KV/mm to about 35 KV/mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.