High voltage motors often use a star (Y) connection for the following key benefits:

1. Reduced Insulation Requirements:
   Star connection lowers phase voltage, reducing the insulation needs and cost for each winding.

2. Improved Safety:
   The neutral point can be grounded, providing safer operation and easier fault detection.

3. Lower Starting Current:
   Star connection limits the inrush current during startup, reducing mechanical and electrical stress.

4. Cost & Reliability Balance:
   Star connection optimizes winding design, lowering manufacturing costs while increasing motor reliability.