| 发明名称 |
Voltage protective apparatus for variable-frequency power system. |
| 摘要 |
<p>An apparatus for detecting a voltage in a variable-frequency power system equipped with a variable-frequency power unit in a path extending from an AC power supply line to a load, wherein the threshold value of a protective relay functioning upon occurrence of an abnormal voltage in the power system is determined in accordance with a physical quantity proportional to the system frequency.</p> |
| 申请公布号 |
EP0271777(A2) |
申请公布日期 |
1988.06.22 |
| 申请号 |
EP19870117881 |
申请日期 |
1984.06.27 |
| 申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
TAKATA, NOBUHARA MITSUBISHI DENKI KABUSHIKI KAISHA;HINO, SAKIO MITSUBISHI DENKI KABUSHIKI KAISHA;ITO, MAKOTO MITSUBISHI DENKI KABUSHIKI KAISHA;KANEKO, SEIJI MITSUBISHI DENKI KABUSHIKI KAISHA |
| 分类号 |
H02H7/09;(IPC1-7):H02H7/09 |
主分类号 |
H02H7/09 |
| 代理机构 |
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代理人 |
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| 地址 |
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