| 摘要 |
PROBLEM TO BE SOLVED: To provide a protective relay system which can eliminate the occurrence of mismatching among checked results caused by interrupted checking, during automatic checking to which a retry function is given. SOLUTION: A master unit 1 is constituted so that the unit 1 transmits two kinds of check starting commands of a command A, which does not indicate abnormal part and another command B which indicates the abnormal part, when the abnormal part occurs in a slave unit 2 as the check start commands of the slave unit 2. The slave unit 2 outputs or does not output the abnormal part according to the check start commands when the abnormal part is found as a result of checking. Therefore, the output of an abnormal part unnecessary for a checking interrupt can be eliminated, when for example, the command A is used as a first command and the command B is used as a second command B. |
