DEVICE AND METHOD FOR MEASURING VOLTAGE

PROBLEM TO BE SOLVED: To accurately measure a voltage on an electric cable using a simple configuration.SOLUTION: A voltage measurement device (1) includes: first and second electrode voltage acquisition circuits (61, 62) which can be switched to be either grounded or ungrounded to GND (1); a capacitance detection voltage acquisition circuit (64) which is grounded to GND (2) and is configured to acquire capacitance detection voltage generated at a first electrode (21) when a voltage is supplied to a second electrode (22); and a computation unit (24) for computing a voltage on an electric cable (11) under measurement from first and second voltages, the supplied voltage, and the capacitance detection voltage. 【課題】簡単な構成にて電線の電圧を正確に計測する。【解決手段】電圧計測装置（１）は、ＧＮＤ（１）への接地、非接地が切り替えられる第１，第２電極電圧取得回路（６１，６２）、ＧＮＤ（２）に接地され、第２電極（２２）への電圧注入にて第１電極（２１）に生じる容量検出電圧を取得する容量検出電圧取得回路（６４）、並びに第１，第２電極電圧、注入電圧，容量検出電圧から計測電線（１１）の電圧を計算する計算部（２４）を備える。【選択図】図１