INSULATED TYPE VOLTAGE MEASURING DEVICE

• Main Authors: SAWADA MASAKATSU, SEKINE TAKAYOSHI, NODA RYUZO, HANAWA YOJI, MATSUO KAZUAKI, OURA YOJI
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

To provide an insulated type voltage measuring device capable of suppressing influence of a floating electrostatic capacitance of an electrode of a detection probe and measuring AC voltage of a conductor with high accuracy even if a type of an electric wire to be measured is different.SOLUTION: A detection probe 13 includes a conductor-side electrode 18 disposed close to an outer surface of a voltage measurement object, an output-side electrode 19 disposed so as to face the conductor-side electrode 18 with a smaller area than the conductor-side electrode 18 while keeping a space, and a dielectric 20 which is provided between the conductor-side electrode 18 and the output-side electrode 19 and has a large insulation resistance and a low dielectric constant. A voltage detection unit 21 is configured by an I/V conversion circuit, and by inputting current of the output-side electrode 19, an output voltage Vout proportional to the current of the output-side electrode 19 is obtained.SELECTED DRAWING: Figure 1 【課題】検出プローブの電極の浮遊静電容量の影響を抑制し、測定対象電線の種別が異なっても導体の交流電圧の電圧測定を高精度で行うことができる絶縁型電圧測定装置を提供することである。【解決手段】検出プローブ１３は、電圧測定対象物の外面に近接して配置される導体側電極１８と、導体側電極１８より面積が小さく導体側電極１８と間隔を保って対面して配置される出力側電極１９と、導体側電極１８と出力側電極１９との間に設けられ絶縁抵抗が大きく誘電率が小さい誘電体２０とを有し、電圧検出部２１は、Ｉ／Ｖ変換回路で構成され、出力側電極１９の電流を入力し出力側電極１９の電流に比例した出力電圧Ｖｏｕｔを得る。【選択図】 図１