| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To determine easily and quickly a state of a solar cell module. <P>SOLUTION: An AC signal superimposed by an AC signal superimposing device 5A is subjected to 1/4 frequency division at a point C' on a transmission cable 4 by means of a frequency divider 6B and a frequency divider 6C. An AC signal superimposed by an AC signal superimposing device 5B is subjected to 1/2 frequency division at the point C' on the transmission cable 4 by means of the frequency divider 6C. An AC signal superimposing device 5C superimposes an AC signal of the same frequency as that of the AC signal superimposing devices 5A and 5B at the point C' on the transmission cable 4. A failure detector 3 detects and determines the AC signals at the point C' on the transmission cable 4, so as to determine the states of solar cell modules 1A, 1B and 1C. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
