| 摘要 |
PROBLEM TO BE SOLVED: To provide a detection method of the insulation state of a non- grounded power source capable of reducing the capacity of a data table used for determining a ground resistance value. SOLUTION: In this detection method of the insulation state of the non- grounded power source, an address for referring to the data table of an insulation resistance value is calculated based on the number of data on the data table where data of a voltage value of a direct-current power source, a voltage value between both terminals of a capacitor when connecting the capacitor in series between the power source and a ground potential part during a time set beforehand, and the insulation resistance value of the power source to the ground potential part, and the insulation resistance value of the power source to the ground potential part is determined from the calculated address. Hereby, the ground resistance value RL can be determined by a single data table without requiring use of a plurality of data tables such as a threshold data table and a ground resistance value data table as before, to thereby reduce the capacity of the data table used for determining the ground resistance value. COPYRIGHT: (C)2003,JPO
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