S811+U42P3S Eaton Soft Starter

The Eaton S811+ model S811+U42P3S is a soft starter built for three-phase motor starting in demanding industrial applications. It is rated at 420 A and uses a U-frame construction, with an operating voltage range of 200–600 V at 47–63 Hz. A digital interface module provides an LCD display, Modbus RTU communication, and a 24 Vdc control supply for monitoring and control. Premium pump-control functionality includes level/edge sensing and an extended ramp. The unit supports inline wiring, which is the default configuration, as well as inside-the-delta wiring for starting and stopping motors while reducing mechanical stress. Built-in overload protection and a bypass contactor support installation and motor protection in industrial environments.