how to wire a three phase step up transformer?

To wire a three-phase step-up transformer, first ensure the transformer is rated for the appropriate voltage and current. Connect the primary side to the three-phase power source, ensuring correct phase alignment (A, B, C). Use appropriate gauge wire for the load. On the secondary side, connect the output to the load, ensuring it matches the higher voltage rating. Always follow local electrical codes and safety standards, and consider using protective devices like fuses or circuit breakers.