... oil-immersed transformers Rated Power: 30~31500kVA Rated HV: 6,6.3,10,11,15,20,35kV Rated LV: 220,380,400,415 ... medium size tank, thus to further ensure tank rim from oil leakage.Dvanced technology is adopted during protective welding, thus fully ensuring ... the welding quality. X-ray leakage detection is carried out ...