CVケーブル活線絶縁測定における発生モードによる1Hzの信号電流検出動作

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  • Detection Mechanism of 1Hz Current Signals for the In-service Insulation Diagnosis of XLPE Power Cables by Using the Generation Mode
  • CV ケーブル カッセン ゼツエン ソクテイ ニ オケル ハッセイ モード ニ ヨル 1Hz ノ シンゴウ デンリュウ ケンシュツ ドウサ

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1Hz current signals can be detected when in-service insulation diagnostic measurement is used for the maintenance test of XLPE power cables. By using “transmission mode” and the water tree deteriorated XLPE cables, the author had disclosed the detection mechanism of the 1Hz current signals By using “generation mode”, this paper describes detection mechanism of 1Hz current signals of in-service insulation diagnosis of XLPE power cables. Two kinds of generation mode operation mechanism had been studied. One, non-liner voltage and current characteristics of deteriorated insulator and beat-down operation create 1Hz signal, and another create wide band frequency signals like void discharge which is not proofed sufficiently using dried deteriorated specimen.

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