3RW5217-1AC14, Soft Starter, 18,5 kW, 38 A, 200 to 480V AC

Siemens 3RW52 Soft Starter Series – Overview

Siemens 3RW52 soft starters are high-performance motor starting solutions designed for demanding industrial applications requiring precise and reliable control of three-phase asynchronous motors. The 3RW52 series focuses on reducing mechanical stress, limiting inrush current, and supporting higher motor power ratings with advanced protection functions compared to compact soft starters. With robust construction and enhanced motor protection capabilities, Siemens 3RW52 soft starters are well suited for heavy-duty applications such as large pumps, compressors, conveyors, mixers, and industrial process machinery where dependable motor starting and operational reliability are critical.

Product Description: 3RW5217-1AC14

The Siemens 3RW5217-1AC14 is a SIRIUS 3RW52 three-phase motor soft starter rated for 38 A (at 40 °C) and designed for a wide supply voltage range of 200…480 V AC. It covers typical motor power ratings up to 11 kW at 230 V (direct inline) and up to 18.5 kW at 400 V (or when used in an inside-delta configuration), making it suitable for medium-sized industrial motors used on pumps, conveyors, compressors and mixers. The unit uses proven soft-start/soft-stop control (ramp-up and ramp-down) with adjustable current limitation to reduce mechanical shock and limit inrush current. Control supply for the device is 110 V AC (control circuit). The starter includes an internal bypass contact arrangement, integrated electronic motor overload protection and thermistor (PTC/Klixon) evaluation, and can be fitted with communication modules (for example PROFINET/PROFIBUS) where system integration is required. These capabilities make the 3RW5217-1AC14 appropriate for engineering and procurement teams seeking a reliable motor soft starter that provides controlled starting behaviour, motor protection and the option to integrate into industrial networks.

Key Soft Starter Attributes