| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance the reliability on the entire system by avoiding such state of things that the parallel operation of UPS is disabled due to the break of a signal line or the like, and also to reduce the cost up by complicated wiring construction. <P>SOLUTION: This system has a plurality of UPS 11-1 to 11-N, a parallel board 13 for connecting each UPS 11-1 to 11-N with the next in parallel, and a plurality of control circuits 14-14 for controlling the parallel operation of each UPS 11-1 to 11-N. This is equipped with a plurality of power line carrier communication devices 15-15 which are mounted on each UPS11-1 to 11-N and are connected to each output line 12-12 of each UPS 11-1 to 11-N. Each power line carrier communication device 15-15 receives information on the parallel operation between several parallel control circuits 14-14 via each output line 12-12 of each UPS11-1 to 11-N, and each parallel control circuit 14 controls the parallel operation of the plurality of UPS 11-1 to 11-N, based on the information about the parallel operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
