3RW4027-1BB14, Soft Starter, 15 kW, 32 A, 200 to 480V AC

Siemens 3RW40 Soft Starter Series – Overview

Siemens 3RW40 soft starters are advanced compact motor starting solutions designed for smooth starting and stopping of three-phase asynchronous motors in industrial applications. The 3RW40 series focuses on reducing mechanical stress, limiting inrush current, and providing enhanced motor protection compared to basic soft starters. With integrated bypass functionality and flexible configuration options, Siemens 3RW40 soft starters are well suited for pumps, fans, compressors, conveyors, and general industrial machinery requiring reliable and efficient motor starting.

Product Description: 3RW4027-1BB14

The Siemens 3RW4027-1BB14 is a SIRIUS 3RW40 soft starter in size S0 rated for 32 A (Ie at 40 °C) and specified for motor ratings of 15 kW at 400 V (also specified as 7.5 kW at 230 V). It is designed for use on supply voltages from 200 to 480 V AC and accepts a control/auxiliary voltage of 110–230 V AC/DC. Typical motor compatibility covers small-to-medium three-phase asynchronous motors up to the listed power ratings, making this starter suitable for industrial motor starting tasks such as pumps, fans, light conveyors and compressors where controlled torque build-up and reduced mechanical stress are required. Verified model features include an integrated bypass contactor for reduced thermal dissipation during run, built-in motor overload protection and adjustable current limiting for controlled starts and protection against prolonged overloads. The unit is supplied with screw terminals and an IP20 enclosure suitable for control panels and electrical cabinets.

Key Soft Starter Attributes