3RW5515-1HA14, Soft Starter, 11 kW, 25 A, 200 to 480V AC

Siemens 3RW55 Soft Starter Series – Overview

Siemens 3RW55 soft starters are heavy-duty motor starting solutions designed for high-power industrial applications requiring robust and reliable control of three-phase asynchronous motors. The 3RW55 series focuses on reducing mechanical stress, limiting inrush current, and supporting very high motor power ratings with advanced motor protection and monitoring capabilities. With a rugged design and suitability for demanding operating conditions, Siemens 3RW55 soft starters are well suited for large pumps, compressors, crushers, conveyors, mills, and other heavy industrial machinery where dependable motor starting and long-term reliability are critical.

Product Description: 3RW5515-1HA14

The Siemens 3RW5515-1HA14 is a SIRIUS 3RW55 series motor soft starter rated for 25 A and specified for motors up to 11 kW (at 400 V). It is designed for three-phase supply systems with a wide main supply voltage range of 200–480 V AC and uses a 110–250 V AC control supply. Typical motor compatibility includes small-to-medium three-phase asynchronous motors (for example 11 kW at 400 V or 5.5 kW at 230 V as commonly referenced for this class). The unit includes an integrated bypass contactor to reduce heating and conduction losses after the start sequence, and it provides motor protection functions such as electronic overload protection and thermistor (PTC) input support. With an IP20 enclosure rating for standard panel mounting and screw-type main terminals, this SKU is suitable for industrial motor starting tasks — pumps, fans, conveyors and compressors — where controlled ramp-up, reduced mechanical stress and reliable overload monitoring are required. Additional modular communication options (PROFINET, PROFIBUS, Modbus TCP/RTU) and an HMI option are available for system integration and condition monitoring when fitted with the appropriate plug-in modules.

Key Soft Starter Attributes