Digital protective relay device

摘要

PROBLEM TO BE SOLVED: To obtain a digital protective relay system in which, when abnormality occurs in a protected CPU part, reliability of abnormality information to be transmitted remotely can be improved.;SOLUTION: A digital protective relay system 70 comprises a protected CPU part 10 including a first CPU 11 and an external interface part 20 including a second CPU 21 in charge of an interface function between a remote device 2 and the protected CPU part 10. The protected CPU part 10 includes a first RAM 12 which stores an abnormality history of the protected CPU part 10, and the external interface part 20 includes a second RAM 22 and a third RAM 25 which stores an abnormality history. The second CPU 21 transmits the abnormality history stored in the third RAM 25 to the remote device 2.;COPYRIGHT: (C)2013,JPO&INPIT