Arc fault detector for AC or DC installations
US8743513B2 · kind B2 · utility
3Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 2011 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | May 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H1/0015
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An arc fault detector comprises a current transformer (CT) having a primary winding and a secondary winding (W1), the primary winding being formed by at least one conductor (L) of an AC or DC supply circuit. The inductance of the CT is selected so that the CT has a lower frequency operating point (LFOP) of at least 10 KHz. The detector also comprises circuitry (10, 12, SW) for disconnecting the supply if the voltage induced in the secondary winding meets predetermined criteria as to magnitude and duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.