Siemens Soft Starter, 7.5kW, 400V AC, 3 Phase - 3RW30 Series - 3RW3018-1BB14 This 7.5kW soft starter from Siemens' SIRIUS range is used to protect your 3-phase AC electric motor. Fit it easily into your system with other SIRIUS products such as 3-pole circuit breakers. The device is designed for DIN rail mounting and built to compact dimensions to save you space in your cabinet. Integrated bypass allows the motor to run continuously after the start cycle has completed, while 'self-hold' and 'end of start-up' auxiliary contacts allow you to control interlocking circuits and external devices such as pumps. This component makes an ideal replacement for DOL and Star-Delta self-starters. • IP20 (ingress protection) rating means it's touch-safe and resistant to dust
• Control voltage of 110V to 230V AC means you can control it from UK or US mains supplies without the need for a transformer
• Status indicator informs you of failure or bypass states clearly and quickly How does a soft starter work? A soft starter limits the amount of torque running through a motor's circuits. It reduces the voltage, then lets it rise back up gradually for a smooth progression of current.