| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain an automatic monitoring device for protective relay systems wherein the operating time of a system is increased and the reliability of the system itself without significant addition of hardware. <P>SOLUTION: The automatic monitoring device for protective relay systems comprises: transfer interruption signal receivers 21 and 22 that receive a transfer interruption signal transferred through a predetermined transmitter when an accident is detected (M) in any other protective relay system; contacts 5<SB>2</SB>and 6<SB>2</SB>that are closed when the transfer interruption signal is received; a contact 3<SB>1</SB>that is closed when an accident is detected (FD) in the own system; a circuit breaker trip circuit with which the trip circuit coil 4 of a circuit breaker is connected in series; and auxiliary relays 5 and 6 that are connected with the contact 5<SB>2</SB>and 6<SB>2</SB>and detect that the transfer interruption signal receivers 21 and 22 have received a transfer interruption signal. The monitoring device is also provided with an automatic inspection circuit 206 and continuous monitoring circuits 205 and 207 for the enhancement of the reliability of the system. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
