Online Partial Discharge Analysis
Partial discharges have been known to accelerate the aging process. They cause erosion of insulating material and propagate through treeing mechanism eventually bridging the electrodes and causing insulation breakdowns. While the Capacitance & Tan Delta tests gives us the indication of presence of these discharges, this test uses acoustic method to find partial discharges on the transformer.
Partial Discharge test will be done using Partial Discharge Analyser at normal running condition without disturbing the supply. PD Analyser system is used for partial discharge test that includes analysis software that gives discharge patterns for defect identification and also quantifies the partial discharge in the winding for trend analysis.