Ground fault current interrupter circuit with arcing protection
US4931894A · kind A · utility
101Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1989 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Sep 29, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ground fault current interrupter (GFCI) circuit is provided with the additional capacity of detecting and protecting against arcing between a power line and the metal sheath or cover of a power cable. An arc protection winding is located on the core of the GFCI differential transformer and is connected in series with a resistance between the metal sheath and a neutral or return line. By adjusting the number of turns of the arc protection winding and the size of the series resistance, the sensitivity of the arc portection arrangement to arcing current may be set at a desired level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.