Product Overview

The Schneider ATS22C25Q Altistart 22 Digital Soft Starter is a motor-control device for managing the starting and stopping of asynchronous motors in industrial equipment.

In applications with larger motor loads, direct starting can produce a sharp current demand and sudden torque transmission to the mechanical system. The ATS22C25Q is used to make this transition more controlled, which is particularly useful for equipment such as pumps, compressors, fans, conveyors, and other machinery with noticeable starting inertia.

The Altistart 22 family is intended for applications where the primary requirement is controlled motor acceleration and deceleration rather than continuous speed adjustment. The ATS22C25Q therefore sits between the incoming power supply and the motor as part of the machine’s motor-control system.

Technical Specifications

Product Features

The ATS22C25Q is intended for motor applications where controlling the starting and stopping process is more appropriate than using direct-on-line starting.

Key characteristics include:

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

The starter should be matched to the actual motor, supply arrangement, starting duty, and driven load.

Working Principle

The ATS22C25Q is installed in the motor power circuit and manages the motor’s electrical conditions during startup and stopping.

A simplified power arrangement is:

Incoming Supply → ATS22C25Q → Asynchronous Motor → Mechanical Load

During startup, the starter controls the voltage applied to the motor so that the motor can accelerate progressively rather than receiving the full electrical supply instantaneously.

This is useful on machinery where a sudden torque increase can create mechanical stress. For example, a conveyor may experience a sudden belt load during direct starting, while a pump can experience an undesirable hydraulic transition. Controlled acceleration helps make these starting events less abrupt.

When stopping is controlled through the starter, the motor’s transition toward a stopped condition can also be managed according to the application.

Industrial Applications

The ATS22C25Q is suited to industrial machinery where controlled starting is required for a relatively substantial motor load.

The actual suitability of the starter depends on the motor characteristics and the starting behavior of the connected load.

Compatible System Components

The ATS22C25Q normally forms part of a larger motor-control arrangement.

For a complete installation, the starter and motor should be considered together. The load profile is particularly important when evaluating starting performance.

Installation and Maintenance

Because the ATS22C25Q is used in a higher-power motor-control application, installation should include appropriate electrical protection, wiring, grounding, ventilation, and enclosure arrangements.

The relatively large physical dimensions and 33 kg weight should also be considered when planning cabinet installation and mechanical support.

Recommended checks include:

• Confirm the complete ATS22C25Q model number.
• Verify the motor and incoming supply requirements.
• Check power-terminal connections.
• Inspect motor cables and terminals.
• Verify control wiring.
• Confirm grounding.
• Check enclosure ventilation and clearance.
• Inspect terminals for overheating or looseness.
• Review starter configuration after replacement.
• Check the mechanical load if acceleration is abnormal.
• Inspect the motor if excessive current or starting difficulty occurs.
• Perform a controlled test run after installation.

A starting problem should not automatically be attributed to the soft starter. Incorrect motor connections, excessive mechanical load, unsuitable configuration, or power-supply problems can produce similar symptoms.

Recommended Related Models

For Altistart 22 applications, related models should be selected according to the motor and electrical system rather than physical similarity alone.

Before using a related model as a replacement, verify the motor requirements, electrical configuration, starting duty, and application conditions.

Key Advantages

• Altistart 22 digital soft starter
• Intended for asynchronous motors
• Controlled motor acceleration
• Controlled stopping function
• Suitable for industrial motor-control applications
• Useful for 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 main purpose of the ATS22C25Q?

The ATS22C25Q controls the starting and stopping process of an asynchronous motor. It is used where direct starting would create an undesirable electrical or mechanical transition.

Why is the driven load important when configuring a soft starter?

The load determines how much torque is required during acceleration and how the motor behaves during startup. A high-inertia conveyor, compressor, and pump can have very different starting characteristics, so the application cannot be evaluated from motor size alone.

Does the ATS22C25Q provide continuous variable-speed control?

No. A soft starter primarily manages motor acceleration and stopping. It does not perform the same continuous frequency and speed control function as a variable-frequency drive.

What should be checked if a motor connected to the ATS22C25Q has difficulty starting?

The motor connections, incoming power, starter configuration, mechanical load, protection devices, and control signals should all be checked. Excessive load or incorrect wiring can cause starting problems even when the starter itself is functioning correctly.