1SYN352342R8600

ABB 1SYN352342R8600 (SDA-50) is a fully automatic Star-Delta motor starter designed for controlled starting of 50 HP / 37 kW three-phase induction motors. The exact ABB ordering code corresponds to the SDA-50 model with a 400–415 V AC control coil, while technical product data specifies an operating voltage of approximately 400 V AC. The Star-Delta starting method initially connects the motor windings in star configuration, helping reduce the starting current compared with Direct-On-Line starting. After the preset starting period, the starter automatically changes the motor connection to delta configuration for normal operation. The SDA-50 is suitable for industrial applications such as large pumps, compressors, blowers, fans, conveyors, HVAC equipment, machine tools and process machinery where controlled motor starting and reduced inrush current are required.