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经营范围
发明名称
摘要
PURPOSE:To provide a directional comparison transfer protective relay system, which permits wide reduction with a special method of detecting short-circuit out outer accident in a transfer protective relay system.
申请公布号
JPS6048972(B2)
申请公布日期
1985.10.30
申请号
JP19750095828
申请日期
1975.08.08
申请人
HITACHI LTD
发明人
KUBO TAKAO;KIJIMA NOBORU
分类号
H02H3/26;H02H3/28
主分类号
H02H3/26
代理机构
代理人
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