Molded case circuit breaker current transformer with spiral bus
US4630018A · kind A · utility
2Cited by
13References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1985 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Nov 8, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F19/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A current transformer is provided for the electronic trip unit of a molded case circuit breaker. The current transformer has a core with a winding encoiled about the core and a bus spiraled about the core. The spiral bus establishes a current path from one end of the bus to the other which will conduct current through the core in a spiral fashion. The spiral bus design effectively rotates the bus 90 degrees achieving a narrow transformer design which fits into the electronic trip unit without increasing the width of the trip unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.