Method of detecting partial discharges and diagnostic system for electrical apparatus
US7183774B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2004 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Jun 1, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/1254
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention provides a method of detecting partial discharges in an electrical appliance insulated in a receptacle and a system of diagnosing the state of the appliance using this method. With the help of an UHF antenna placed in the receptacle of the appliance, the method includes analyzing the spectrum (RS1) of the electromagnetic signal picked up by the antenna and of identifying within the spectrum one or more frequencies of interest (B1, B2), for each of which the signal has an amplitude greater than a predetermined threshold value. To identify the frequency/frequencies of interest, the spectrum of the signal received by the antenna is compared with a reference spectrum (RS2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.