Method and electromagnetic sensor for measuring pa

专利名称：Method and electromagnetic sensor for

measuring partial discharges in windings ofelectrical devices

发明人：Rabach, Germano,Visintin, Massimiliano申请号：EP03103659.3申请日：20031002公开号：EP1418437A1公开日：20040512

专利附图：

摘要：A method for measuring partial discharges in windings of electrical devicescomprised by the following steps: Applying voltages having high frequency components

to the winding of the electrical device, detecting partial discharge signals by means of atuned VHF and/or UHF electromagnetic sensor located close to the electrical device andevaluating the detected sensor signals by means of electrical hardware or software.Further, a VHF and/or UHF electromagnetic sensor for measuring partial discharges inwindings of electrical devices is described wherein an antenna made of a coaxial cable isprovided as electromagnetic sensor. The present invention provides an improvedmeasuring method and sensor device, which avoid the drawbacks of the prior art. Theimproved measuring method provides more detailed information about the status of theinsulation system and clear short-circuits during the testing are not necessary any more.The proposed sensor provides a surprisingly simple and inexpensive solution.

申请人：ALSTOM Technology Ltd

地址：Brown Boveri Strasse 7 00 Baden CH

国籍：CH

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