3RW5536-6HA14, Soft Starter, 90 kW, 171 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: 3RW5536-6HA14

The Siemens 3RW5536-6HA14 is a SIRIUS 3RW55 soft starter rated for up to 171 A continuous current and designed for three-phase mains between 200–480 V AC. At standard connection ratings this unit is specified for motor powers up to 45 kW at 230 V and 90 kW at 400 V, making it suitable for medium‑to‑large motors used in pumps, fans, compressors and conveyor drives. Control supply for the starter is 110–250 V AC, and the device provides integrated functions for motor overload protection and advanced start monitoring. The 3RW5536-6HA14 includes an internal bypass arrangement to reduce heat inside the control panel and improve efficiency during run, and it supports condition-monitoring and configurable start limiting (current / torque control) typical of the High-Performance 3RW55 family. This model is aimed at engineers and procurement teams specifying reliable industrial motor starting where reduced mechanical stress, inrush current limiting and built-in motor protection are required.

Key Soft Starter Attributes