what is the most common three phase transformer supply connection?

The most common three-phase transformer supply connection is the Delta (?) connection. In this configuration, the primary and secondary windings are connected in a closed loop, allowing for balanced load distribution and high starting torque for motors. Delta connections are preferred for industrial applications due to their ability to handle high power loads and provide a stable voltage supply. Additionally, they can effectively manage phase imbalances and reduce harmonics in the system.