| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a protective relay device which easily checks relay operation in times series without significantly increasing display/editing processes in the protective relay device. <P>SOLUTION: The protective relay device includes: an A/D converter that converts an analog electric quantity input from a power system into a digital electric quantity; a relay computer that uses the digital electric quantity for relay operation; a sequence processor which outputs an operation command to a breaker, based on the relay operation results; a memory which detects the relay operation results or the operation command to the breaker as a trigger, and stores the digital electric quantity until a predetermined time elapses after the trigger is detected, in time series at every detection time point; and a display compiler which selects the digital electric quantity at the designated time point and displays it on a display unit. <P>COPYRIGHT: (C)2011,JPO&INPIT |
