发明名称 |
Device for monitoring the leakage current of a surge arrester |
摘要 |
A device for monitoring a leakage current of a surge arrester has a measuring element for detecting a leakage current in a leakage current circuit. A filter assembly filters the leakage current in order to extract a third harmonic oscillation which is evaluated by an evaluation circuit with respect to the value thereof. The evaluation circuit delivers at least one warning signal to a display device. In a preferred embodiment, three display devices operating as a signaling light are provided. A power supply for the used circuits is obtainable by way of a transformer which extracts a necessary auxiliary zero-potential energy contained in the leakage current and with the aid of a main power supply unit connected to the transformer.
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申请公布号 |
US7336193(B2) |
申请公布日期 |
2008.02.26 |
申请号 |
US20060573545 |
申请日期 |
2006.03.27 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
SCHILLERT HAIKO;SCHUBERT MATTHIAS;STEINFELD KAI |
分类号 |
G08B21/00;H01C7/12;H02H3/04 |
主分类号 |
G08B21/00 |
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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