发明名称 |
Ground fault detecting apparatus and method for detecting ground fault of field circuit and exciting circuit by detecting ground fault current flowing from ground to neutral point of exciting circuit |
摘要 |
An apparatus detects a ground fault of an exciting circuit and a field circuit of an AC exciting variable speed rotating machine. The exciting circuit outputs an excited voltage controlled a frequency and/or an amplitude, and the field circuit of the AC exciting variable speed rotating machine is applied a field current by the excited voltage of the exciting circuit. A ground resistance is connected between a neutral point and a ground. The apparatus detects a current flowing from a ground to a neutral point through the ground resistance, and detects the ground fault based upon the detected current. Therefore, the apparatus can detect a ground fault of a field circuit and an exciting circuit of an AC exciting rotating machine during the AC exciting rotating machine operation with certainty. <IMAGE> |
申请公布号 |
EP0707367(A1) |
申请公布日期 |
1996.04.17 |
申请号 |
EP19950307213 |
申请日期 |
1995.10.11 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
ISHIGURO, TAKASHI;TAKEI, YOSHINORI |
分类号 |
G01R31/34;H02H3/16;H02H7/08;H02H7/122 |
主分类号 |
G01R31/34 |
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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