发明名称 |
WAVEFORM RECORDER AND FAULT POINT LOCATING SYSTEM |
摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a communication time and reduce a locating time. <P>SOLUTION: A waveform recorder 20 comprises: a change detection unit 60 for detecting whether there is a change in a voltage and a current in each phase; first recording control means 50 for controlling a recording unit 45 to record waveform data of the voltage and the current before and after the occurrence time when the change occurred; determination means 50 for performing first determination whether a zero-phase current exceeds a first threshold H1 in a determination time period and second determination whether every voltage of three phases becomes less than a second threshold in the determination time period; and second recording control means 50 for controlling the recording unit 45 to record determination information indicating the determination by the determination means 50 in association with the waveform data. <P>COPYRIGHT: (C)2013,JPO&INPIT |
申请公布号 |
JP2012189392(A) |
申请公布日期 |
2012.10.04 |
申请号 |
JP20110052037 |
申请日期 |
2011.03.09 |
申请人 |
HOKKAIDO ELECTRIC POWER CO INC:THE;HOKKEI INDUSTRIES CO LTD |
发明人 |
SAKAI AKIRA;SHUGO MASATOMI;FUJII KEITARO;KUBOUCHI SACHIYUKI;EZAKI EIICHI |
分类号 |
G01R31/08;H02H3/00 |
主分类号 |
G01R31/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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