... noise We mainly choose SFZ type oil immerge outdoor style Power Transformer. Which have the characteristic of full sealing, free ... region.Cooling style: ONAF, OFAF, OFWF, ODAF, ODWF, to suit different conditions. Workmanship: Use high quality silicon steel sheet ... the low noise, high quality insulation oil to guarantee the best working condition. Auxiliary Transformer, casted by SC(B) epoxy resins ...