... steel piled up, Insulation level: F and H.the transformer output and input voltage can be according to customerdemand design with ... and output, etc.Any voltage bellow 660V can be transfer to other lower voltages (415V, 380V, 200V, 207V, 217V, 230V, 240V, 110V ... Any lower voltages (230V, 240V, 217V, 200V, 207V, 110V) can be transfer to higher voltages (380V, 415V) also.Transformer Power: 8KW, 10KW, 15KW ...