| 摘要 |
The present invention identifies a disconnection-fault by-pass diode. A test device (11) comprises the following: a signal introduction circuit (26) for applying a disconnection position identification signal (51b) between a positive electrode and a negative electrode of a solar battery string (3); and a fault computation part (45) for identifying the by-pass diode for which a disconnection-fault occurred, on the basis of the alternating current component of voltage between a frame ground and the positive electrode or the alternating current component of voltage between the frame ground and the negative electrode in a case where the disconnection position identification signal (51b) is applied. |
