... 2. durable,low losses 3.customized 4.ISO&CE three phase step down transformer :ISO&CE 1Input voltage; three ... phase 380VAC2Output voltage; three phase 220VAC3 Frequency,50-60Hz4Power,40KVA5Load capacity, 100%6Insulation,H grade ... around dispersing air hole13Connection Symbol, Y type Dry-type three phase step down transformer