The Square D ATS01 Soft Start (Altistart 01) by Schneider Electric is a compact, solid-state reduced-voltage soft starter engineered to suppress torque surges and limit peak inrush currents during motor starting and stopping operations. Designed for fractional and low-horsepower single-phase and three-phase asynchronous motors rated from 3 to 85 Amps across line voltages ranging from 110 VAC to 575 VAC (50/60 Hz), the Altistart 01 series provides controlled voltage acceleration and deceleration ramps to prevent mechanical line shock, reduce component wear, and minimize machine downtime. Serving as a feature-rich, space-saving alternative to traditional star-delta or across-the-line electromechanical starters, the ATS01 mini soft start incorporates an internal bypass relay, integrated status diagnostics, and flexible DIN-rail or panel mounting for streamlined installation across industrial motor control systems.
Technical Details
- Model / Product Line: Square D Altistart 01 Series (ATS01 / ATS01N1 / ATS01N2)
- Manufacturer: Schneider Electric / Square D
- Device Type: Solid-State Reduced Voltage Soft Starter / Torque Limiter
- Current Rating Range: 3 A to 85 A continuous load current
- Rated Supply Voltage: 110 VAC to 575 VAC (Single-Phase & 3-Phase, 50/60 Hz)
- Motor Power Capacity: 0.37 kW to 45 kW (0.5 HP to 60 HP)
- Ramp Control Dials: Front-mounted potentiometers for setting starting ramp time (1 to 10s) and starting voltage threshold (30% to 80% motor voltage)
- Deceleration Control: Adjustable soft stop deceleration time (1 to 10s on ATS01N2 variants)
- Bypass Function: Integrated internal bypass relay to minimize thermal loss during continuous motor operation
- Status Indicators: Front LEDs indicating Power On (Green LED) and Nominal Voltage Reached (Yellow LED)
- Control I/O: Discrete logic inputs for Run, Stop, and Boost functions; relay and logic outputs for end-of-start status
- Mounting & Dimensions: 35 mm DIN Rail or Panel Mount | Compact 22.5 mm or 45 mm Frame Width
- Protection & Standards: IP20 Enclosure Rating | Compliant with IEC/EN 60947-4-2, UL, CSA, CE, and CCC
Key Features
- Limits starting torque spikes and peak electrical current to eliminate mechanical stress on belts, gears, and drive couplings.
- Front potentiometer dials enable quick, user-friendly adjustments for start torque threshold, acceleration time, and soft deceleration.
- Integrated bypass contactor eliminates heat dissipation during steady-state operation, reducing cabinet cooling demands and energy costs.
- Ultra-compact footprint saves up to 25% panel space compared to traditional electromechanical wye-delta reduced-voltage starters.
- Direct side-by-side mounting capability and seamless compatibility with TeSys U starters and GV2/GV3 manual motor protectors.
Applications
- Industrial conveyor belts, material transport systems, and automated sorting machinery.
- Centrifugal pumps, HVAC/R fans, blowers, and industrial air compressors.
- Automated doors, gates, car wash systems, small cranes, and specialty OEM equipment.
- General low-horsepower single-phase and three-phase AC induction motor starting replacing mechanical contactors.
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