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专利名称：Partial discharge measuring device发明人：Kawabata, Osamu c/o Fuji Electric Company
Ltd
申请号：EP85306863.3申请日：19850926公开号：EP0180322B1公开日：190503
摘要：A partial discharge measuring device for use with high voltage apparatus isresponsive to an input first signal (W10) composed of a partial discharge pulse signal(P10) having a pulse width which lies in a predetermined time range and which has
overlapped therewith a single shot or periodic noise signal (N 10) having a rise or fall timelonger than the predetermined time range. The device comprises a first phase
shift/reduction circuit (11) for producing a second signal (W12) which is delayed relativeto the first signal by a predetermined time and for producing a third signal (W13) as thedifference between the second and first signals. A second phase shift/reduction circuit(14) produces a fourth signal (W15) by delaying the third signal by the predeterminedtime and produces a fifth signal (W16) as the difference between the fourth and thirdsignals. A phase shift/ multiplying circuit (17) produces a sixth signal (W18) by delayingthe fifth signal by a time twice the predetermined time and multiplies the fifth and sixthsignals together to provide a seventh signal (W19) comprising a partial discharge pulsesignal (P19) substantially without any noise signal.
申请人：FUJI ELECTRIC CO., LTD.
代理机构：Skone James, Robert Edmund
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