Current transformer assembly for electronic circuit interrupters
US5889450A · kind A · utility
13Cited by
14References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1996 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Oct 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/0228
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A circuit interrupter employing an electronic trip unit utilizes a current transformer assembly containing both air and metal cores on a common load strap for providing sensing current to the electronic trip unit along with supplying operating power to the trip unit electronic components. A two-part plastic housing provides support for the metal core and the sensing coil while further providing thermal transfer of heat generated within the transformer secondary windings out to the load strap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.