| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To safely measure the insulation resistance of a measurement target at any time point. <P>SOLUTION: In an insulation resistance measuring method, in a state that an inspection voltage is applied by a power source part 2 between one of a pair of output terminals 50a and 50b (e.g. the output terminal 50a) of a photovoltaic power generation unit 50 (a measurement target having an electromotive force), and a grounding part, a measuring part 3 measures a first current value of a current flowing between the output terminal 50a and the grounding part, and also measures a second current value of a current flowing between the output terminal 50a and the grounding part in a state that the application of the inspection voltage between the output terminal 50a and the grounding part is stopped. An insulation resistance value between the output terminal 50a and the grounding part is calculated based on a third current value obtained by subtracting the second current value from the first current value, and the voltage value of the inspection voltage applied. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
