how to connect a transformer with power?

To connect a transformer to power, first ensure the transformer is rated for the voltage and frequency of your power source. Begin by turning off the power supply. Connect the primary winding terminals of the transformer to the power source, ensuring correct polarity. Use appropriate gauge wires for the current rating. Secure all connections and ensure insulation. Finally, turn on the power supply and check for proper operation, monitoring for any unusual sounds or overheating.