3RA2444-8XF32-1AC2 SIEMENS

The 3RA2444-8XF32-1AC2 from Siemens is a complete contactor assembly specifically designed for star-delta (wye-delta) starting of three-phase motors. This assembly is optimized for AC-3 duty, making it suitable for applications involving frequent starting and stopping of motors. It is rated for motors up to 75 kW at 400 V, providing ample power handling capability for a wide range of industrial applications. The control voltage is 24 V AC at 50/60 Hz, ensuring compatibility with common industrial control systems. The size S3 designation indicates the physical dimensions and current carrying capacity of the contactors within the assembly. Screw terminals are used for electrical connections, providing a secure and reliable method for wiring. An electrical and mechanical interlock is included to prevent simultaneous closing of the main and delta contactors, ensuring safe and reliable operation. The auxiliary contacts include 3 normally open (NO) and 3 normally closed (NC) contacts for flexible control and monitoring options. This pre-assembled and tested unit simplifies installation and reduces wiring time, making it an efficient solution for motor starting applications.