間接測定のための励磁インピーダンス測定装置

カテゴリ: 研究会(論文単位)

論文No: IM10023

グループ名: 【A】基礎・材料・共通部門 計測研究会

発行日: 2010/03/05

タイトル(英語): Development of an exciting impedance measuring system for indirect measurement of current transformers

著者名: 堤 晋太郎(日本電気計器検定所),笠原 守生(日本電気計器検定所),五十嵐 晃(日本電気計器検定所)

著者名(英語): Shintaro Tsutsumi(Japan Electric Meters Inspection Corporation),Morio Kasahara(Japan Electric Meters Inspection Corporation),Akira Igarashi(Japan Electric Meters Inspection Corporation)

キーワード: 変流器|励磁インピーダンス|二次漏れインピーダンス|間接測定|Current transformer|Exciting impedance|Secondary leakage impedance|Indirect measurement

要約(日本語): 当所における20 kA以下の変流器の測定は，主として標準変流器や電流比較器を用いた直接測定により行われている。一方，20 kAを超える変流器の測定は，励磁インピーダンスと漏れインピーダンスから誤差を推定する間接測定により行われる。今回，励磁インピーダンスを簡便且つ広範囲に測定できる新たな装置を構築し，良好な結果が得られたので報告する。

要約(英語): In Japan Electric Meters Inspection Corporation (JEMIC), the current transformer with primary current more than 20 kA is measured by analyzing its impedance. An impedance analyzing method for the current transformer, the so-called “indirect measurement method” is achieved by measuring the exciting impedance and the leakage resistance.We developed a new exciting impedance measuring setup that was able to be measured easily and widely for an indirect measurement method. The ratio error and phase displacement of two under-test current transformers were measured using a developed measuring setup and a current comparator.In this report, the principle and specification of developed measuring setup are described. As a result of verification measurements, the values measured by the indirect measurement method agreed with the values obtained by the current comparator within 5 ppm in ratio and 26 rad in phase at a primary current of 100 A.

原稿種別: 日本語

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