how to wire a 3 phase step down transformer?

To wire a 3-phase step-down transformer, first ensure the power supply is disconnected. Identify the primary and secondary windings on the transformer. Connect the three-phase input lines (L1, L2, L3) to the primary terminals, ensuring correct phase sequence. For the secondary side, connect the output terminals to your load, typically in a delta or wye configuration, depending on your application. Finally, ground the transformer according to local electrical codes for safety.