Schneider ATS48M12Q Soft Starter

Applications

The Schneider ATS48M12Q Soft Starter is a high-capacity motor starting solution from the Altistart 48 series, designed for large three-phase asynchronous motors. With a 1045 A factory-set current and a rated supply voltage range of 230–415 V AC, it is engineered for industrial installations where controlled motor acceleration, reduced starting stress, and dependable equipment operation are important.

• Industrial Pumping Stations: Helps control motor acceleration in large pumping systems, reducing mechanical stress during startup.

• Water and Wastewater Treatment: Supports the starting of high-power pumps and other compatible motor-driven equipment.

• Ventilation and Air Handling: Provides controlled startup for large industrial fans and ventilation systems.

• Heavy Industrial Machinery: Suitable for evaluating in applications with substantial motor loads and demanding starting conditions.

• Compressor Systems: Supports controlled acceleration of compatible motor-driven compressors when the starting profile matches the equipment requirements.

• Large Production Facilities: Can be integrated into industrial motor control cabinets for applications requiring high-current soft starting.

Advantages

Controlled Motor Acceleration

The Altistart 48 platform uses torque-control starting technology to help manage motor acceleration. This approach can reduce mechanical shock to connected equipment compared with direct-on-line starting, depending on the motor, load, and configured starting profile.

High-Current Motor Control

With a factory-set current of 1045 A, the ATS48M12Q is designed for large motor installations. Its actual continuous current capability depends on the connection arrangement and the application's normal-duty or heavy-duty requirements.

Motor and Starter Thermal Protection

The starter incorporates thermal protection functions for the motor and starter. Correct configuration of motor ratings and protection settings is essential to help prevent damage caused by excessive operating temperatures or inappropriate loading.

Flexible Connection Arrangements

The ATS48M12Q supports installation in the motor supply line or connection to the motor delta terminals, subject to the applicable wiring arrangement and operating limits. This flexibility allows engineers to evaluate different system configurations.

Industrial Control and Monitoring

The unit provides discrete inputs, configurable logic outputs, relay outputs, and a Modbus serial communication interface. These features support integration into compatible control systems for operating status, fault monitoring, and supervisory control.

Reduced Mechanical Stress During Starting

By controlling the motor's starting process, the soft starter can help reduce abrupt torque changes in suitable applications. This may benefit connected equipment such as pumps, fans, and other large motor-driven systems.

Technical FAQs

1. What is the primary function of the Schneider ATS48M12Q?

It controls the starting of three-phase asynchronous motors by managing the applied motor voltage and starting torque. Its purpose is to provide controlled acceleration rather than variable-speed operation throughout the motor's running cycle.

2. What supply voltage does the ATS48M12Q support?

The specified rated supply range is 230–415 V AC, with an operating supply voltage limit of approximately 195–456 V. The actual installation must remain within the applicable electrical specifications.

3. What does the 1045 A rating represent?

The 1045 A value is the factory-set current associated with this model. It should not be interpreted as a universal continuous-current rating for every connection arrangement or duty class. Selection must account for the motor current, connection method, starting conditions, and application duty.

4. Can the ATS48M12Q be used with a motor connected in delta?

Yes. The product supports connection to the motor delta terminals when the motor winding arrangement and installation meet the manufacturer's requirements. The applicable current rating and wiring instructions must be followed.

5. Does this soft starter provide variable-speed control?

No. A soft starter primarily controls motor starting and stopping. Once the motor has reached normal operation, it generally runs at a speed determined by the supply frequency, motor characteristics, and load. Applications requiring continuous speed adjustment typically need a suitable variable frequency drive.

6. What protection functions are available?

The ATS48M12Q includes motor and starter thermal protection and line-phase failure protection. Correct parameter configuration and suitable upstream protective devices remain necessary for a complete motor protection scheme.

7. What communication protocol does the unit support?

It provides a Modbus serial communication interface using an RS-485 multidrop connection. Communication settings and network wiring must be configured to match the connected controller or supervisory system.

8. Can an external bypass contactor be used?

Yes. An external bypass arrangement is available as an option. Its selection and wiring should follow the manufacturer's design instructions, including requirements for protection, switching coordination, and operating status.

9. What should be checked when replacing an existing ATS48M12Q?

Verify the supply voltage, motor rated current, connection method, starting duty, control supply, communication requirements, terminal arrangement, and cabinet ventilation. A replacement should also be checked against the original control logic and protection settings.

10. What is the recommended approach to commissioning?

Confirm the wiring and protective devices, enter the correct motor parameters, configure starting and stopping settings, verify control inputs and outputs, and perform controlled functional tests. Commissioning should be completed by qualified personnel following the applicable electrical safety procedures.