| 摘要 |
PROBLEM TO BE SOLVED: To improve the compression ratio of communication data. SOLUTION: Firstly, data as the same transmission object as conventional devices is compressed and compressed data is transmitted to a host computer 2 from a multifunctional protective relay 1a. On and after the second time, a change section is left as it is to the data as the first transmission object, and a data displayed by the data in which the data not changed is expressed by the same numeric value, is prepared. Multifunctional protective relays 1a, 1b compress the data, and transmit it. |
