发明名称 |
Earth connection current or fault determination - in AC systems uses current transformer and current measuring instrument |
摘要 |
<p>Faulty or earth connection current determination in AC systems uses current transformer and current measuring instrument. A resistance system dependent on voltage is arranged between the current transformer (1) and current measuring instrument. It consists of a rectifier bridge (2), a Zener diode (3), a limiting resistor (RB) and a smoothing circuit. The secondary voltage of the transformer (1) is across the first terminals (A, B). If the secondary voltage is caused by a low primary current after rectification in the rectifier bridge (2), voltage lower than the Zener voltage of the diode is across the second terminals (C, D). A voltage approx. proportional to the secondary voltage is connected across the third terminals (E, F).</p> |
申请公布号 |
DE2605672(A1) |
申请公布日期 |
1977.08.18 |
申请号 |
DE19762605672 |
申请日期 |
1976.02.13 |
申请人 |
STROEMER,RUDOLF,DIPL.-ING. |
发明人 |
STROEMER,RUDOLF,DIPL.-ING. |
分类号 |
G01R15/18;G01R19/15;G01R27/18;(IPC1-7):01R19/16 |
主分类号 |
G01R15/18 |
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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