Schneider Altistart ATS22 Soft Starter

The Schneider Electric Altistart 22 ATS22 Soft Starter is designed for soft starting and stopping of three-phase asynchronous motors, particularly in pump and fan applications. With rated current options from 17 A to 590 A and operating voltage ratings from 208 V to 600 V, the series covers motor power applications up to 400 kW, depending on the selected model and supply voltage. Featuring voltage and torque control, an integrated bypass function, motor thermal protection and Modbus communication, the ATS22 provides a practical motor starting solution that helps reduce electrical and mechanical stress while simplifying motor control system design.

Controlled Starting and Stopping

The ATS22 combines voltage and torque control to provide smooth motor acceleration and deceleration. Its current-limiting function supports controlled motor startup, with a maximum current limitation of approximately 3.5 times the starter rated current for the referenced configurations. Adjustable starting torque, acceleration time and stopping parameters allow users to adapt motor operation to different load conditions. These functions are particularly useful in pumping systems where controlled stopping helps reduce pressure fluctuations and water hammer.

Integrated Bypass and Motor Protection

The ATS22 features an integrated bypass function that connects the motor to the supply after the starting phase is completed. This reduces power losses in the thyristor section during normal motor operation and helps simplify the external power circuit. Integrated motor thermal protection also supports motor protection during operation, while configurable monitoring functions help identify abnormal operating conditions.

Communication and Control Integration

The Altistart 22 supports Modbus serial communication for integration with compatible PLCs and industrial automation systems. Its control interface includes configurable inputs and relay outputs for motor operation, running status, fault indication and other control requirements. SoMove software compatibility allows users to configure operating parameters and transfer settings between compatible devices.

Industrial Applications

The ATS22 is primarily designed for standard-duty industrial applications involving pumps and fans. Other suitable applications include compressors, conveyors, turbines, escalators, ventilation systems and general industrial machinery requiring reduced-voltage motor starting and controlled stopping.

Model Selection and Technical Specifications

• Rated Operational Voltage: 208–600 V AC.

• Rated Operational Current: 17–590 A.

• Motor Power: 4–400 kW, depending on model and supply voltage.

• Motor Compatibility: Three-phase squirrel-cage asynchronous motors.

• Control Technology: Voltage and torque control.

• Current Limitation: Up to approximately 3.5 × starter rated current for referenced configurations.

• Integrated Function: Internal bypass.

• Protection: Integrated motor thermal protection.

• Communication: Modbus serial communication.

• Applications: Pumps, fans, compressors, conveyors and general industrial machinery.