Electromagnetic and radio frequency interference suppression for ground fault circuit interrupters
US5490030A · kind A · utility
17Cited by
8References
19Claims
0Family size
Inventors
Key dates
| Filing date | Jan 31, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Jan 31, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H9/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A ground fault interruption circuit has a detector circuit coupled to an electrical distribution circuit load to detect ground fault conditions in the load. A filtering circuit connected between the detector circuit and distribution network comprises a pi-network filter for attenuating common-mode electromagnetic interference and differential-mode electromagnetic interference. The pi-network filter includes three filter portions which together provide a third order filter to attenuate the interference signals at the frequencies of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.