Safety device for a differential protection apparatus
US4736265A · kind A · utility
4Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1987 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Aug 14, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H11/001
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a safety device for an electric installation protection apparatus, comprising a residual differential current detector through which pass a phase conductor and a neutral conductor, and a processing circuit supplied by a rectifier bridge and connected to the phase and neutral conductors. It further comprises biasing and safety circuits formed by a static bidirectional switch connected between a ground connection and the AC terminals of the rectifier bridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.