What is the advantage of using a star delta starter?

Correct Answer: Option C — It is the most cost effective method of reduced voltage starting.

Star-delta starters provide a cost-effective method for reducing starting current in induction motors without the complexity or expense of autotransformers or soft starters. By initially connecting windings in a star configuration, the voltage per phase is reduced by a factor of 1/√3, effectively limiting the inrush current during acceleration.