Development of Reference Shunt for Short-time Alternating High Current Tests and Study of Measuring System

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  • Kida Junzo
    Power Systems Company, High Voltage & High Power Testing Laboratory, Hitachi, Ltd.
  • Nakajima Masatoshi
    Industrial Infrastructure Business Group, Fuji Electric Co., Ltd.
  • Goda Yutaka
    Central Research Institute of Electric Power Industry, Electric Power Engineering Research Laboratory
  • Kikuchi Kunio
    Transmission & Distribution Systems Center, High Voltage & High Power Testing Laboratory, Mitsubishi Electric Co., Ltd.
  • Kudo Kietsu
    Power Systems Company, Toshiba Corporation
  • Ishii Hiromi
    High Voltage & High Power Testing Laboratory, Nissin Electric Co., Ltd.
  • Matsui Yoshihiko
    High Power Testing Laboratory, Meidensha Corporation
  • Matsumura Toshiro
    Graduate School of Engineering, Nagoya University
  • Kawamura Tatsuo
    The University of Tokyo

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  • 交流短時間大電流測定用標準分流器の開発と測定システムの検討
  • コウリュウ タンジカン ダイ デンリュウ ソクテイヨウ ヒョウジュン ブンリュウキ ノ カイハツ ト ソクテイ システム ノ ケントウ

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Abstract

Short-circuit tests for power circuit breakers and others require alternative short-time current measurement, from a few kA to over several tens kA. However, the reference measurement system as a national standard or a specified secondary standard instrument to directly perform comparative test as a complete calibration test in high current class has not yet been established globally. The Japan Short Circuit Testing Committee (hereinafter referred to as “JSTC”) has therefore developed a shunt resistor which can be used as a standard instrument for high current measurement. Reference system using this shunt resistor is also considered by JSTC. The performance of the newly developed shunt resistor has been checked through several methods, such as resistance measurement, high power current test, high frequency current test, temperature rise test and interference test. The results of the tests proved satisfactory performance. Resistance of the shunt resistor before and after the tests was invariant and stable. This makes the shunt resistor adequate for a reference in practical use. In addition, evaluation of uncertainty of the whole reference system including this shunt resistor satisfactorily fulfills the requirements of IEC 62475 edition 1.0, 2010.

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