Analysis and Treatment of Abnormal Defects in Transformer Oil Chromatography

Abstract This article analyzes the cause of an abnormal defect in oil chromatogram a transformer, and puts forward control measures suggestions. It is analyzed that phase A B main transformer poor contact o f dynamic static contacts unloaded tap changer, high temperature overheatin g, development ablation, resulting chromatogram. The ablation no-load tap-changer may be due to installation transportation (or electrodynamic shock or U-switch design other factors), are not close contact, larger resistan ce causes overheat, conditions Sulfur corrosion occurs on surface lower product gradually deposits which further aggravates contact. Although passivation agent added t he later period, protection effect at limited, it can no longer protect Under action current, ablated.