发明名称 |
Method and apparatus for monitoring conductor currents for a fault current |
摘要 |
A method and apparatus for monitoring conductor currents for a fault current which changes the magnetic bias of a magnetic circuit in which the magnetization of the magnetic core is alternatingly reversed by sequences of magnetizing pulses and a determination made of the number of pulses up to which the pulse amplitude exceeds predetermined voltage reference value, with the change of this number of pulses used to derive an output signal.
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申请公布号 |
US4307429(A) |
申请公布日期 |
1981.12.22 |
申请号 |
US19800119834 |
申请日期 |
1980.02.08 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
BREIMESSER, FRITZ |
分类号 |
H02H3/347;(IPC1-7):H02H3/28 |
主分类号 |
H02H3/347 |
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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