发明名称 |
DIGITAL PROTECTIVE RELAY DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To provide a digital protective relay which can cope with all system failures. SOLUTION: A ground current differential relay 14 has a ratio difference calculating unit for processing a zero-phase circulation current i3 and a ratio calculating unit for processing only a ground current i4 and can cope with all system failures.
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申请公布号 |
JP2002051451(A) |
申请公布日期 |
2002.02.15 |
申请号 |
JP20000238881 |
申请日期 |
2000.08.02 |
申请人 |
HITACHI LTD;CHUBU ELECTRIC POWER CO INC |
发明人 |
NORO JUN;ITO MASAHIRO;ABE TAKAHISA |
分类号 |
H02H3/36;(IPC1-7):H02H3/36 |
主分类号 |
H02H3/36 |
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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