Detection of Slackening of Conductor Connection in Circuit Breakers Using Conducted Emission

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  • 伝導性ノイズによるブレーカの導体接続部緩み検出に関する基礎検討
  • デンドウセイ ノイズ ニ ヨル ブレーカ ノ ドウタイ セツゾクブ ユルミ ケンシュツ ニ カンスル キソ ケントウ

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Abstract

<p>Overheating due to the screw slackening of a circuit breaker, an electromagnetic switch, a terminal, or a plug-receptacle in a distribution panel or an electric apparatus is one of the main causes of fire accidents originating from electrical equipment in industrial and domestic environments. In this study, we propose a novel screw slackening sensing method for a commercially available 100V blanch circuit breaker. Attention is paid to the conducted emission spectrum obtained during discharge, which occasionally occurs in a small gap between the slackened connected conductors. An investigation of the screw slackening is conducted based on a convolutional neural network. Thus, the proposed approach serves as a potentially effective method for the prevention of fire accidents due to screw slackening.</p>

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