Self-powered electrical measuring system isolated from electrical perturbances
US4831327A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | May 1, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R15/181
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-powered electrical measuring system for measuring current in a high voltage circuit. The system utilizes a Rogowski coreless coil disposed about a conductor for sensing current flowing in the conductor and producing a voltage signal proportional to the magnitude of the current. An electronic conditioning circuit is provided for conditioning the voltage signal for transmission by optical link means to a remote receiver operating which is at ground potential and totally isolated from the measuring system in the high voltage circuit. A floating supply circuit uses a tapping coil, having a magnetic core disposed about the conductor, whereby to produce a supply voltage for the electronic conditioning circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.