Product Overview

The Schneider ATS22C25S6 Soft Starter for Asynchronous Motor belongs to the Altistart 22 family and is used to manage the starting and stopping process of asynchronous motors in industrial equipment.

In practical motor-control applications, direct starting can cause a sudden increase in current and a sharp torque response. This can be undesirable on equipment with belts, couplings, pumps, compressors, conveyors, or other mechanical transmission components. The ATS22C25S6 controls the motor during the starting phase, allowing the machine to reach operating conditions more progressively.

The unit is particularly suitable for installations where the main requirement is controlled motor starting and stopping, rather than continuous adjustment of motor speed. It can therefore be considered for general industrial machinery, pumping systems, fans, compressors, and material-handling equipment.

Technical Specifications

Product Features

The ATS22C25S6 is intended for applications where the motor needs a controlled transition into and out of operation.

• Altistart 22 soft starter
• Suitable for asynchronous motor applications
• Controls motor acceleration during startup
• Supports controlled stopping
• Helps reduce abrupt mechanical torque during starting
• Suitable for industrial motor-control systems
• Applicable to pumps, fans, compressors, and conveyors
• Suitable for general machinery applications
• Dimensions of 425 × 206 × 299 mm
• Stated weight of 33 kg

The final starter selection should take into account the motor characteristics, electrical supply, starting conditions, and driven load.

Working Principle

The ATS22C25S6 is connected between the electrical supply and the asynchronous motor. During startup, it controls the electrical conditions applied to the motor instead of allowing the motor to transition directly from zero speed to full supply conditions.

A simplified arrangement is:

Incoming Power → ATS22C25S6 → Asynchronous Motor → Mechanical Load

This controlled acceleration is useful when a sudden torque increase could place unnecessary stress on a mechanical transmission. On a conveyor, for example, it can help avoid an abrupt belt acceleration. On a pump system, a controlled transition can also be preferable to an instantaneous motor start.

The same principle can be applied during stopping when the application requires a more controlled reduction in motor operation.

The ATS22C25S6 is therefore primarily a starting and stopping controller, not a device intended for continuous variable-speed operation.

Industrial Applications

The ATS22C25S6 can be used in a range of industrial motor applications where controlled starting is required.

The suitability of the starter depends on the characteristics of both the motor and the connected mechanical load.

Compatible System Components

The ATS22C25S6 normally works as part of a complete motor-control installation.

The starter should be evaluated together with the motor, protection equipment, control circuit, and mechanical load when planning a replacement or new installation.

Installation and Maintenance

The ATS22C25S6 is intended for installation within an appropriate electrical cabinet or control enclosure. Its relatively large physical size and 33 kg weight should be considered when planning cabinet mounting and mechanical support.

Before installation or replacement, technicians should verify the complete model number and application requirements.

Recommended checks include:

• Confirm the complete ATS22C25S6 model number.
• Verify the motor and supply requirements.
• Check incoming power connections.
• Inspect motor cables and terminals.
• Verify control wiring.
• Check grounding arrangements.
• Ensure suitable enclosure ventilation.
• Inspect terminals for looseness or overheating.
• Review the starter configuration after replacement.
• Check the mechanical load if acceleration is abnormal.
• Inspect the motor if excessive starting current or poor acceleration occurs.
• Perform a controlled test run after installation.

If the motor does not start correctly, the investigation should include the motor, wiring, load, protection devices, control signals, and starter configuration rather than assuming the starter itself is defective.

Recommended Related Models

Related Altistart 22 models can be considered according to motor requirements and application conditions.

A related model should not be selected based only on physical dimensions or the Altistart 22 family name. The motor, supply arrangement, starting duty, and load characteristics should be checked before substitution.

Key Advantages

• Altistart 22 soft starter
• Intended for asynchronous motors
• Controlled motor acceleration
• Controlled stopping capability
• Suitable for industrial motor-control applications
• Applicable to pumps, fans, compressors, and conveyors
• Suitable for larger motor-control installations
• Dimensions of 425 × 206 × 299 mm
• Stated weight of 33 kg

Technical FAQs

What is the ATS22C25S6 primarily used for?

The ATS22C25S6 is used to control the starting and stopping of asynchronous motors. It is appropriate where direct-on-line starting would create an undesirable electrical or mechanical transition.

How does the ATS22C25S6 affect a conveyor or pump during startup?

It controls the motor’s acceleration rather than applying the full starting condition abruptly. This can be useful for conveyors with belt loads and pump systems where a sudden transition may be undesirable.

Is the ATS22C25S6 a variable-frequency drive?

No. The ATS22C25S6 is a soft starter. Its main purpose is to manage motor starting and stopping, whereas a variable-frequency drive can provide continuous motor-speed control during normal operation.

What factors should be considered before replacing an ATS22C25S6?

The motor characteristics, incoming electrical supply, starting duty, mechanical load, control arrangement, protection devices, and complete ATS22 model number should be checked. Physical dimensions alone are not sufficient for selecting a replacement.