| 摘要 |
PURPOSE: A system for preventing a ground fault accident in a photovoltaic module and a direct current line is provided to maintain safety when the ground fault accident occurs in the photovoltaic module and the direct current line. CONSTITUTION: A ground fault accident preventing device in a photovoltaic module and a direct current line includes a ground electrode unit(110), P(+) side and N(-) side shut resistances, an analog to digital converter(310), and a control unit(410). The ground electrode unit is formed in a container of the photovoltaic module and on a ground separated from the container in a predetermined distance. The P side and N side shut resistances are respectively inserted into a part of a P side and an N side of the direct current line. The analog to digital converter receives a voltage applied in both poles of the ground electrode unit. The control unit makes an alarm or opens a circuit using a digitized value of the voltage in case the voltage is over a threshold value. [Reference numerals] (AA) Accident inducing point |
