发明名称 |
Transformer through-fault current monitor |
摘要 |
A device is provided for monitoring through-fault current in an electric transformer on an electrical power system. The device generally includes a magnitude calculator for calculating the magnitude of current (e.g., a root means square value of current or magnitude of a fundamental of current) based on the current through the electric transformer. A through-fault energy calculator is further provided which is coupled to the magnitude calculator for calculating a through-fault energy value based on the magnitude of current or the calculated current through the transformer. An accumulator is coupled to the through-fault energy calculator for accumulating a plurality of through-fault energy values, and an alarm coupled to the accumulator for indicating that the accumulated through-fault energy values exceed a selected threshold.
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申请公布号 |
US8031447(B2) |
申请公布日期 |
2011.10.04 |
申请号 |
US20080247911 |
申请日期 |
2008.10.08 |
申请人 |
SCHWEITZER ENGINEERING LABORATORIES, INC. |
发明人 |
GUZMAN-CASILLAS ARMANDO;FISCHER NORMANN |
分类号 |
H02H7/04;H02H3/08;H02H9/02 |
主分类号 |
H02H7/04 |
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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