| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce cost for batch-monitoring the operation of each switch of an electric plant. <P>SOLUTION: A switch batch-monitoring device 100 measures a waveform of a master current I1 flowing in a wiring blocker MCCB2 of a DC power supply device 10 by using a clamp-type current transformer CT1, samples the waveform of the master current I1 which is measured by the clamp-type current transformer CT1, detects whether the waveform of the sampled master current I1 is at a prescribed change rate or higher, records the waveform of the sampled master current I1 when it is detected that the waveform is at the prescribed change rate or higher, determines whether a relative current waveform which is obtained by subtracting a stationary current from the recorded waveform of the master current I1 is a control current waveform which flows in a control unit of one switch among a plurality of switches, and records the recorded waveform of the master current I1 when it is determined that the waveform is the control current waveform. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
