Fiber-optic voltage sensor for outdoor high-voltage installations
US6140810A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1998 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Oct 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/241
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The subject matter of the present invention is a fiber-optic outdoor high-voltage sensor 1. The known sensor principle is based on the fact that a piezoelectric quartz cylinder 3 wound with a glass fiber 4a effects a voltage-proportional fiber strain which is measured interferometrically. According to the invention, a 420 kV outdoor sensor 1 is created by virtue of the fact that several quartz cylinders 3 and electrically conductive spacing elements 5 are arranged in an alternating fashion one behind another and are sealed in a silicone-shielded 17 insulating tube 16 by means of polyurethane 18 or silicone 21. Dividing the high voltage between several spaced, E-field integrating sensor elements 2 permits simple field control and a very high measuring accuracy. In addition, the fiber-optic voltage sensor 1 is distinguished by a low outlay on insulation, compactness and low weight, and can easily be scaled to other voltage levels and be effectively combined with optical current sensors 38.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.