UNINTERRUPTIBLE POWER SUPPLY DEVICE, CONTROL METHOD THEREFOR, UNINTERRUPTIBLE POWER SUPPLY SYSTEM, AND UNINTERRUPTIBLE POWER SUPPLY PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an uninterruptible power supply device that can surely, quickly and selectively be disconnected when a fault occurs, by eliminating the transition of a signal line between the uninterruptible power supply devices that are operated in parallel.;SOLUTION: This uninterruptible power supply device comprises a first detection means (A/D converter 10j) that detects output voltage V_oapplied to a load apparatus from this uninterruptible power supply device, and the other uninterruptible power supply devices that are connected to this device in parallel; a second detection means (A/D converter 10h) that detects an output voltage V_iof this device; a first delay means (delay block 100) that delays the output voltage V_oby a prescribed amount; a second delay means (delay block 101) that delays the output voltage V_iby a prescribed amount; and a determination means (control circuit 10e) that determines whether or not this device is broken down by performing a prescribed operation among the output voltage V_o, an output voltage V_odfrom the first delay means, the output voltage V_i, and an output voltage V_idfrom the second delay means.;COPYRIGHT: (C)2006,JPO&NCIPI