Measurement of corona discharge on polymer insulator through the UV rays sensor including optical lens

This paper studies a measurement of ultra-violet (UV) emission of corona discharges on polymer insulators using an UV rays sensor including an optical lens. In addition, these data have been compared with the images of an UV rays camera. The detection of an UV rays signal begins at 60kV, which is about 37.5% of the breakdown voltage of the polymer insulator and the stronger the high voltage supplied to the polymer insulator was. Also, the corona discharge quantity sharply increased at 60kV when the image of the UV rays was observed. It can be determined that the polymer insulator mounted on a live part must be examined when the discharge risk exceeds approximately 40%. In conclusion, the status of power utilities can be checked using an UV sensor, relevant products to which can be developed at moderate cost.