... transformer 1) Frequency; 50hz/60hz 2) Phase, 3-phase,isolation 3)ISO9001/2008.CE.CCC 3-phase dry type isolation transformerApplication; Our transformer produce ... , IEC439, JB55555, GB226 and inland standard.Feature;SG series 3-phase dry type transformer comprehensive used in AC 50-60HZ, ... not meet yours, please contact us to customize. 3-phase transformer/isolation transformer with CE certificated