Star-Delta Reduced Voltage Starting for Motors Y-Delta starting, also known as star-delta starting, is a method used to start three-phase induction motors. It is a technique that reduces the starting current and torque to ensure a smooth and controlled motor startup. In Y-Delta starting, the motor windings are initially connected in a "Y" or star configuration during the starting phase. This connection allows the motor to draw reduced current from the power supply, typically around 30% of the fu