ELECTRICITY DETECTION SENSOR, AND GROUND FAULT POINT LOCATING SYSTEM

To provide an electricity detection sensor that enables a high-voltage AC-load switch to collectively detect electricity of each phase without installing the electricity detection sensor for each phase, and can deal with a frequency band required in a ground fault point survey.SOLUTION: An electricity detection sensor 1 has: an annular core 11 allowing for penetration of a three-phase high-voltage distribution line; a conductor 12; and an exterior structure 13 that stores the core 11 and the conductor 12, and has a hole 131 allowing for penetration of a three-phase high-voltage distribution line 200. A dimension of the exterior structure 13 is configured in such a manner that a thickness is equal to or less than 50 mm, an inter-phase is equal to or less than 150 mm, a width is equal to or less than 450 mm, and a depth is equal to or less than 150 mm, so that the electricity detection sensor is made attachable inside a high-voltage AC-load switch 20, and is configured to detect surge electricity flowing through any of each phase of the high-voltage distribution line, in which a frequency characteristic shows that a dB conversion value when an input frequency is equal to or more than 50 Hz and equal to or less than 80 kHz becomes ±3 dB, and the dB conversion value when the input frequency is over 80 kHz and equal to or less than 100 kHz becomes ±5 dB.SELECTED DRAWING: Figure 1 【課題】各相ごとに電流検出用センサを設置することなく高圧交流負荷開閉器で各相の電流を一括検出可能であり地絡点探査に要求される周波数帯域に対応可能な電流検出用センサを提供すること。【解決手段】３相の高圧配電線を貫通させる環状のコア１１と導体１２とコア１１及び導体１２を収納し３相の高圧配電線２００を貫通させる孔１３１を有する外装構造１３とを有する電流検出用センサ１は外装構造１３の寸法を厚さ５０ｍｍ以下相間１５０ｍｍ以下幅４５０ｍｍ以下縦１５０ｍｍとすることで高圧交流負荷開閉器２０の内に取付可能とし高圧配電線の各相のいずれかに流れるサージ電流を検出し周波数特性が入力周波数が５０Ｈｚ以上８０ｋＨｚ以下である場合のｄＢ換算値が±３ｄＢになり入力周波数が８０ｋＨｚを超え１００ｋＨｚ以下である場合のｄＢ換算値が±５ｄＢになることで上記課題を解決する。【選択図】図１