⚡ Introduction When starting large three-phase induction motors , connecting them directly to the supply (DOL starter) often causes a surge of 6–8 times the full load current . This leads to voltage dips, mechanical stress, and overheating . To address this, industries widely use the Star Delta Starter , a cost-effective and reliable method of reducing starting current. The Star Delta Starter is one of the most common reduced-voltage starters, especially for motors above 5.5 kW . It reduces the starting current to about one-third while maintaining acceptable torque for light and medium-duty applications. 👉 Related: Advantages and Disadvantages of Auto Transformer Starter Infographic: Advantages and Disadvantages of Star-Delta Starter in Motor Starting 🔧 Working Principle of Star Delta Starter The star delta starter works by initially connecting the motor in star configuration during starting. This reduces the applied voltage on each winding to 1/√3 (about...