Oil-immersed, dry-type power transformer repair, overhaul, maintenance inspection programs

Oil-immersed, dry-type power transformer repair, overhaul, maintenance inspection item A, patrol transformer load current is within the rated range, with or without drastic changes, the operating voltage is normal. The oil level B, the inspection of the transformer, oil color, oil temperature exceeds the allowable value, with or without oil leakage. C, ceramic casing is clean, cracks, damage and dirt, a discharge phenomenon, whether the contact terminals discoloration overheating. D, the degree of discoloration silica gel moisture absorption vessel whether saturated, if the transformer operation sound normal. E, there is no air in the gas relay, is filled with oil, no oil level gauge glass rupture, explosion-proof membrane is complete. F, transformer enclosure, surge arresters, neutral grounding is good, transformer oil valve is normal. G, doors transformer between the shutters iron mesh fence and fire equipment is intact, there is no deformation of the transformer base. ?