Product Description This Antek 100VA industrial control power transformer has 3 input coils 115V + 115V + 47V. It can connect to 115V input (parallel), 230V input (series 115V together) and 277V input (series all 3 together). The output can connect in parallel to get 18V at 5.5A or in series to get 36V with center tap at 2.7A. They are specially designed to work on all standard 115V, 230V and 277V at 50Hz or 60Hz. These transformers have heavier gauge wires than the normal requirement to avoid the copper lost during the full power output. The dielectric test is more than 3500V in between primary and secondary coils. In most of the cases, this transformer can be output 20% more power from its rating at 60Hz power source without any problem. This transformer comes with 2 rubber pads and all mounting hardware. AU-1218 Product Brief Weight: 5.0lbDimensions: 4.4″ d x 1.7″ hUL listed E497714 Electrical Characteristics Inputs 115V, 115V, 47V Power 100VA Output Voltage Current 18V 2.7A 18V 2.7A