Voltage sensing apparatus for medium-voltage electrical power distribution systems
US7230411B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Dec 16, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A molded voltage sensor is provided that achieves excellent sensing accuracy over a wide temperature range by molding promary and secondary capacitances are of a voltage divider into a solid dielectric material and wherein th e capacitances are preferably fabricated from the same material, or at least materials having nearly identical temperature coefficients of permittivity. In a preferred arrangement, a first member of dielectric material includes a conductive pattern of the outer surface thereof and an electrical connection attached to the conductive pattern. The first memberis the molded into a prerdetermined location with respect to a central conductor and a layer of the dielectric molding material is also molded over the exterior of the first member. Another conductive pattern is formed on the over-molded layer. The overall assembly is then molded to form a body of the sesired shape and provides insulation between the conductor and the conductive patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.