Single-pole voltage detector, in particular for overhead electrical lines
US5814997A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1995 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Aug 3, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/155
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage detector includes, inside a Faraday cage, between a contact electrode and a counterweight outside the Faraday cage, a load resistor to which is connected a detector circuit driving at least one indicator device. The distance L between the counterweight and the contact electrode and the active surface area S of the counterweight respectively and simultaneously satisfy the following conditions: PA1 L>200 mm PA1 50 mm.sup.2 <S<500 mm.sup.2. The counterweight includes a conductive wire that is part of a screened electric cable. The screen is shorter than the electric cable and is a tubular extension of the Faraday cage. Applications include testing overhead transmission and distribution of electric wire lines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.