Altivar ATS01 Soft Starters Schneider Electric Altivar ATS01 Soft Starters are designed for simple machines from 0.37kW to 15kW and operate as a soft start/soft stop unit for asynchronous motors. The ATS01 series enhances the starting performance of asynchronous motors by allowing them to start smoothly, gradually, and in a controlled manner. This method helps prevent mechanical shocks that cause wear and tear and subsequent maintenance and production downtime. Schneider Electric Altivar ATS01 Soft Starters are ideal for conveyors, pumps, fans, compressors, and automatic doors and gates.