发明名称 |
COMPENSATION OF SIMPLE FIBEROPTIC FARADAY EFFECT SENSORS |
摘要 |
The present invention relates to a monitoring system for detecting earth faults in an electrical power supply grid. The system may comprise a plurality of monitoring devices mounted in a number of monitoring locations, each of the monitoring devices may include a detector for detecting level of harmonics in the electrical power. The level of harmonics is preferably detected in a specific frequency range. The monitoring devices may further include a memory device for storing a harmonics reference value and may still further include a processor for comparing the level of harmonics with the reference level. The monitoring device may even still further include a communication device for transmitting an alarm provided the level of harmonics is above the reference level for a specific period of time. |
申请公布号 |
WO2006053567(A2) |
申请公布日期 |
2006.05.26 |
申请号 |
WO2005DK00737 |
申请日期 |
2005.11.18 |
申请人 |
NESA A/S;BJOERN, LARS, NOERGAARD |
发明人 |
BJOERN, LARS, NOERGAARD |
分类号 |
G01R31/02;H02H3/52;H02J13/00 |
主分类号 |
G01R31/02 |
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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