发明名称 |
AN IMPROVED ONLINE INCIPIENT FAULT SENSOR DEVICE FOR DETECTION OF INCIPIENT FAULT IN OIL-FILLED ELECTRICAL APPARATUS SUCH AS A TRANSFORMER |
摘要 |
<p>A sensor detecting incipient fault in oil-filled electrical apparatuses (transformer) includes a sensor head (1) directly mounted on an air vent port of a Buchholz relay (3) and a display/control unit (2) operably connected to the sensor head (1). The sensor head (1) senses hydrogen gas and transmits to the display/control unit (2) an electrical signal equivalent to the concentration of the free hydrogen accumulated in the Buchholz relay (3). The display/control unit (2) compares the value of the electrical signal equivalent with a stored value and outputs a signal when the received signal value exceeds a preset value. The sensor head (1) comprises a membrane (10,11) formed of a first (ceramic) material (10) to isolate free gases from the liquid phase to the gaseous phase, and a second (polymeric) material (11) to isolate hydrogen from the mixed gaseous phase.</p> |
申请公布号 |
EP2411784(A1) |
申请公布日期 |
2012.02.01 |
申请号 |
EP20090842130 |
申请日期 |
2009.11.18 |
申请人 |
ELECTRICAL RESEARCH&DEVELOPMENT ASSOCIATION |
发明人 |
SHRINET, VAGISH;PANDYA, NILESH |
分类号 |
G01N7/10 |
主分类号 |
G01N7/10 |
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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