sensor frame for online monitoring of power transformer furans

摘要

Patent Specification: "Sensor structure for online monitoring of furans in power transformers". The present invention relates to the sensor frame (16) for online monitoring of furan levels in the oil of a transformer tank. the sensor frame includes a UV light source (26), a filter (30) that allow only UV light of a given wavelength range to pass, window (32) allowing filtered UV light to pass through It is a UV light detector (36) for receiving UV light passing through the window. When the sensor frame is mounted on the transformer tank that comes online to expose the window to the oil and the furans in the oil are being monitored, the furans will absorb UV light, thus creating a difference in the UV light received by the detector. light when compared to the UV light received by the light detector when the monitored oil has no furan. The light detector output signal is substantially proportional to the total of furans in the monitored oil.