| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a digital relay which permits checking of soundness of a transmission system in relation to a transmission system monitoring device provided on a higher level even without an actual measurement value input from a connected main circuit bus line. <P>SOLUTION: A digital relay for protecting a load 4 connected to a main circuit bus line 1 comprises: a measurement circuit 12 for performing calculation based on an input measurement of a main circuit current; a main CPU 10 for performing data processing; a transmission CPU 11 for performing processing of data for transmission; a transmission interface circuit 13 for transmitting and receiving transmission data to and from a transmission system monitoring device 15 on a higher level through a transmission bus 14 provided outside. Measurement value simulation output means 16 is provided in the main CPU 10 as simulated output generating means for outputting simulated data to the transmission system monitoring device 15. <P>COPYRIGHT: (C)2012,JPO&INPIT |
