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发明名称
RATIO DIFFERENTIAL RELAY DEVICE FOR TRANSFORMER
摘要
申请公布号
JPS52125736(A)
申请公布日期
1977.10.21
申请号
JP19760041852
申请日期
1976.04.15
申请人
HITACHI LTD
发明人
AKISAWA YASUROU
分类号
H02H7/045;H02H3/26;H02H7/04
主分类号
H02H7/045
代理机构
代理人
主权项
地址
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