发明名称 |
Circuit for measuring the ground resistance of an ungrounded power circuit |
摘要 |
A measuring circuit for measuring the ground resistance of an ungrounded power circuit, particularly a d-c system supplied from a converter circuit in which a series circuit including an a-c voltage generator, a measuring resistor and a coupling member is connected between the object of the measurement and ground and an evaluation circuit including a phase sensitive rectifier circuit forms the unknown ground resistance by dividing the active component of the current driven by the generator voltage through the series circuit into the voltage between the measurement object and ground.
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申请公布号 |
US4066950(A) |
申请公布日期 |
1978.01.03 |
申请号 |
US19760721852 |
申请日期 |
1976.09.09 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
RUMOLD, GERHARD;RUSS, GEORG |
分类号 |
G01R27/18;G01R27/20;(IPC1-7):G01R31/02;G01R27/08 |
主分类号 |
G01R27/18 |
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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