1SVR507210R4100

The ABB 1SVR507210R4100 (CT-SDX.25) is a high-quality electronic star-delta timer relay designed for reliable motor starting and industrial automation applications. Manufactured by ABB, this timer belongs to the CT-X series and provides a dedicated star-delta switching function for three-phase motor starter control circuits. It operates with a rated control supply voltage of 240V AC and offers four adjustable timing ranges from 3 seconds to 120 seconds. The timer features a fixed star-to-delta transition time of 60 milliseconds and two normally open output contacts rated at 250V and 5A, providing controlled switching of star and delta contactors during motor starting.