| 摘要 |
PROBLEM TO BE SOLVED: To transfer data by measuring/weighing electric quantities around a transformer using a power line carriage technology, and to assure information at a switcher wherein a power must be supplied from a post stage of a switching mechanism. SOLUTION: A CPU of a switcher 5 is provided with a backup power source while power source monitoring devices 7 and 8 are provided to a high-voltage side and low-voltage side of a transformer 2, respectively, for measuring/ weighing electric quantities around the transformer while power-source monitoring devices are cascaded for communication with power line carriage. |
