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- ATS22D75Q
- Soft Starter
- France
- 295 x 145 x 207 mm
- 12 kg
- Xiamen, China
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Product Overview
The Schneider ATS22D75Q Soft Starter is an industrial motor control device from the Schneider Electric Altistart 22 series. It is designed to provide controlled starting and stopping for three-phase asynchronous motors used in industrial automation, process equipment and motor-driven machinery.
Unlike a conventional direct-on-line starter, the ATS22D75Q does not immediately apply full voltage to the motor during startup. Instead, it uses solid-state control technology to gradually increase the motor voltage. This controlled starting process helps reduce electrical inrush current and limits the mechanical shock transferred to the motor and driven equipment.
The ATS22D75Q is particularly suitable for applications where motors operate at a fixed speed but require smoother acceleration and deceleration. Typical applications include pumps, fans, compressors, conveyors, ventilation equipment and other industrial machinery.
The model has a 75 A starter rating, supports a 230–440 V AC three-phase supply, and uses a 230 V AC control circuit. It also provides an internal bypass function and Modbus communication capability for integration with industrial control systems.
With dimensions of 295 × 145 × 207 mm and a weight of approximately 12 kg, the ATS22D75Q is designed for vertical installation inside industrial control cabinets and motor control centers.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Product Series | Altistart 22 |
| Model | ATS22D75Q |
| Product Type | Soft Starter |
| Motor Type | Three-Phase Asynchronous Motor |
| Rated Starter Current | 75 A |
| Rated Supply Voltage | 230–440 V AC |
| Supply Frequency | 50/60 Hz |
| Control Circuit Voltage | 230 V AC |
| Motor Power | Up to 37 kW at 400/440 V |
| Starting Method | Torque-Controlled Soft Start |
| Starting Current Limitation | Approximately 3.5 × Motor Current |
| Internal Bypass | Yes |
| Communication | Modbus |
| Communication Interface | RS-485 |
| Communication Connector | RJ45 |
| Discrete Inputs | 3 |
| Relay Outputs | 2 |
| PTC Probe Input | Yes |
| Cooling Method | Forced Convection |
| Protection Rating | IP20 |
| Mounting | Vertical Installation |
| Dimensions | 295 × 145 × 207 mm |
| Weight | 12 kg |
| Typical Applications | Pumps, Fans, Compressors, Conveyors |
Function and Working Principle
The primary function of the ATS22D75Q is to control the acceleration and deceleration of a three-phase asynchronous motor.
When a motor is started directly across the power supply, it can draw a high starting current and produce a sudden increase in torque. In larger industrial machines, this can result in mechanical shock and additional stress on the motor and connected equipment.
The ATS22D75Q provides a controlled alternative.
The basic system configuration is:
Three-Phase Power Supply
↓
ATS22D75Q Soft Starter
↓
Three-Phase Induction Motor
↓
Driven Machine
During startup, the soft starter progressively controls the voltage applied to the motor. The motor therefore accelerates more gradually rather than reaching full speed immediately.
This can help reduce:
- Motor starting current
- Mechanical shock
- Belt stress
- Coupling stress
- Gearbox loading
- Shaft stress
- Pump pressure fluctuations
- Equipment vibration
The soft starter can also provide controlled stopping when the application requires a gradual reduction in motor speed.
Motor Control in Industrial Automation
The ATS22D75Q is normally positioned between the industrial power distribution system and the motor.
A typical motor control architecture is:
Main Power Supply
↓
Circuit Breaker
↓
Motor Protection
↓
ATS22D75Q
↓
Three-Phase Motor
↓
Industrial Equipment
A PLC can control the start and stop sequence, while the ATS22D75Q performs the actual soft-starting function.
This separation allows the automation controller to manage the production process while the soft starter handles motor acceleration, stopping and associated protection functions.
The ATS22D75Q can also be connected to a Modbus network when remote monitoring or communication with a PLC or supervisory control system is required.
Motor Starting Performance
The ATS22D75Q is rated at 75 A, making it suitable for medium-power industrial motor applications.
Its controlled starting process is particularly useful for equipment where a sudden application of torque can create operational problems.
For example, a conveyor motor may cause belt movement and product displacement if started directly. A pump can create pressure changes when accelerated too quickly. A large fan can generate significant mechanical loading on its shaft and bearings during sudden startup.
The ATS22D75Q addresses these conditions by providing progressive motor acceleration.
Industrial Applications
The Schneider ATS22D75Q can be applied to a variety of industrial motor-control systems, including:
- Industrial water pumps
- Water treatment equipment
- Wastewater systems
- Centrifugal pumps
- Industrial fans
- HVAC equipment
- Ventilation systems
- Air compressors
- Screw compressors
- Conveyor systems
- Material handling equipment
- Packaging machinery
- Manufacturing equipment
- Cooling systems
- Process machinery
- Mining equipment
- Chemical processing equipment
- General factory automation
It is particularly appropriate for constant-speed motor applications where controlled starting is more important than continuous speed adjustment.
Pump Control Applications
Pumps are one of the most common applications for soft starters.
A motor that starts too quickly can produce sudden changes in fluid pressure and flow. These effects can place additional stress on pipes, valves, pump assemblies and mechanical couplings.
With the ATS22D75Q, a typical pump system can operate as follows:
PLC Start Signal
↓
ATS22D75Q
↓
Controlled Motor Acceleration
↓
Pump
↓
Stable Fluid Flow
The controlled acceleration helps reduce mechanical shock and provides smoother pump operation.
This makes the soft starter suitable for water supply, cooling-water circulation, wastewater and industrial process pumping systems.
Fan and Blower Applications
Industrial fans and blowers can have considerable rotational inertia.
Direct starting can cause significant mechanical stress on:
- Fan shafts
- Bearings
- Couplings
- Belts
- Motors
- Gearboxes
The ATS22D75Q gradually accelerates the motor, allowing the fan to reach its operating speed in a controlled manner.
This is useful in industrial ventilation, HVAC and process-air systems.
Conveyor Applications
Conveyor systems frequently require controlled acceleration to prevent sudden mechanical loading.
A conventional direct starter can cause:
- Belt slippage
- Product displacement
- Gearbox shock
- Coupling stress
- Excessive belt tension
The ATS22D75Q provides a smoother acceleration profile, helping the conveyor reach normal operating speed progressively.
This can improve equipment reliability and reduce maintenance requirements.
Internal Bypass Function
The ATS22D75Q includes an internal bypass function.
During startup, the semiconductor control section regulates the motor voltage. Once the motor has reached normal operating conditions, the bypass function allows the motor to operate with reduced continuous losses in the soft-starting section.
This can reduce heat generation within the control cabinet during normal motor operation.
For industrial installations where several motor controllers are installed inside the same cabinet, reducing unnecessary heat generation can also simplify cabinet thermal management.
Communication and Control
The ATS22D75Q supports Modbus communication through an RS-485 interface.
An RJ45 communication connection is provided for network integration.
This communication capability allows the soft starter to participate in a larger industrial control architecture.
Possible applications include:
- Motor status monitoring
- Fault monitoring
- Remote control
- Parameter management
- PLC communication
- Centralized equipment supervision
- Maintenance diagnostics
The unit also provides three discrete inputs and two relay outputs, allowing conventional hardwired control and status feedback.
Protection and Monitoring
The ATS22D75Q provides motor and starter monitoring functions designed to improve operating reliability.
Depending on the system configuration, monitoring can include:
- Motor current
- Thermal conditions
- Phase conditions
- Starting conditions
- Starter status
- Protection status
- Fault conditions
A PTC probe input can also be used for compatible motor temperature monitoring.
These functions allow the soft starter to become part of the overall motor protection and automation strategy rather than operating only as a simple starting device.
Installation and System Integration
Mechanical Installation
The ATS22D75Q has dimensions of:
295 × 145 × 207 mm
The specified weight is:
12 kg
The unit should be installed vertically and sufficient space should be provided around the device for ventilation and maintenance.
The soft starter uses forced convection cooling, so airflow around the cooling surfaces should not be obstructed.
Electrical Installation
A typical installation requires:
- Three-phase incoming power
- Motor output wiring
- Protective grounding
- Control circuit wiring
- Motor protection equipment
- PLC control connections
- Communication wiring when Modbus is used
Correct cable sizing and protection selection are essential for safe operation.
Installation and Commissioning
A typical commissioning procedure can include the following steps:
- Verify the ATS22D75Q model.
- Confirm the motor voltage.
- Confirm the motor current.
- Check the motor power.
- Verify the 230 V control circuit.
- Install the soft starter vertically.
- Connect the three-phase power.
- Connect the motor.
- Verify protective grounding.
- Configure motor parameters.
- Configure acceleration parameters.
- Configure stopping parameters.
- Verify PLC control signals.
- Perform an initial startup.
- Monitor motor current.
- Test the motor under operating load.
- Verify protection functions.
- Confirm stable operation.
The final parameter configuration should always match the actual motor and mechanical load.
Compatible System Components
The ATS22D75Q can work together with several types of industrial automation and electrical components.
| Component | Function |
|---|---|
| PLC | Motor control logic |
| HMI | Operator control and monitoring |
| Circuit Breaker | Short-circuit protection |
| Motor Protection Device | Motor protection |
| Contactor | Electrical isolation |
| Three-Phase Motor | Primary driven equipment |
| PTC Sensor | Motor temperature monitoring |
| Modbus Network | Industrial communication |
| RS-485 Network | Serial communication |
| Industrial Sensors | Process feedback |
| Motor Control Center | Centralized motor control |
| Control Cabinet | Installation and protection |
These components can be selected according to the requirements of the complete motor-control system.
Maintenance and Troubleshooting
Regular inspection can help maintain stable operation of the ATS22D75Q.
Recommended maintenance activities include:
- Check power terminals.
- Inspect motor wiring.
- Check grounding connections.
- Inspect cooling passages.
- Verify forced-air cooling.
- Remove accumulated dust.
- Check control wiring.
- Inspect communication cables.
- Monitor motor current.
- Review fault indications.
- Verify operating parameters.
The cooling system should receive particular attention in dusty or high-temperature industrial environments.
Common Fault Conditions
| Symptom | Possible Cause |
|---|---|
| Motor does not start | Power supply or control signal problem |
| Motor starts too quickly | Incorrect acceleration settings |
| Motor starts too slowly | Incorrect ramp configuration or excessive load |
| Starter trips during startup | Excessive motor load or protection condition |
| Motor overheats | Excessive load or insufficient cooling |
| Repeated thermal faults | Excessive starting frequency or load |
| Communication failure | RS-485 wiring or Modbus configuration |
| Motor stops unexpectedly | Protection function or external control signal |
| Abnormal acceleration | Incorrect motor parameters |
| No status feedback | Relay wiring or configuration problem |
A complete inspection of the motor, electrical supply, control wiring and load should be performed before determining that the ATS22D75Q itself is defective.
Recommended Alternative Models
| Model | Product Type | Key Feature | Typical Application |
|---|---|---|---|
| ATS22D62Q | Soft Starter | 62 A motor starting | Pumps and fans |
| ATS22D62S6 | Soft Starter | 62 A class with alternate control supply | Industrial motor control |
| ATS22D75S6U | Soft Starter | 75 A class with 110 V control | Pumps and fans |
| ATS22D88Q | Soft Starter | Higher-current motor starting | Larger industrial motors |
| ATS22C11Q | Soft Starter | Higher-power motor control | Process equipment |
| ATS22C17Q | Soft Starter | Large motor starting | Heavy industrial systems |
| ATS48 Series | Soft Starter | Advanced motor starting | Industrial process applications |
| ATS430D75S6 | Soft Starter | Newer-generation platform | Modern motor control |
| ATV630 | Variable Frequency Drive | Variable-speed control | Pumps and process systems |
| ATV650 | Variable Frequency Drive | Process-oriented drive | Industrial automation |
When selecting a replacement, the motor voltage, current, control voltage, application type, starting conditions and cabinet configuration should be checked rather than selecting a replacement based only on rated current.
Key Advantages
- Schneider Electric Altistart 22 soft starter
- Designed for three-phase asynchronous motors
- 75 A starter rating
- 230–440 V AC supply range
- 230 V AC control circuit
- Controlled motor acceleration
- Controlled motor stopping
- Reduced starting current
- Reduced mechanical shock
- Internal bypass
- Modbus communication
- RS-485 interface
- RJ45 communication connector
- Three discrete inputs
- Two relay outputs
- PTC probe input
- Forced-convection cooling
- IP20 protection
- Vertical installation
- Suitable for pumps and fans
- Dimensions: 295 × 145 × 207 mm
- Weight: 12 kg
Technical FAQs
What is the Schneider ATS22D75Q?
The ATS22D75Q is an Altistart 22 industrial soft starter designed for controlled starting and stopping of three-phase asynchronous motors.
What is the rated current?
The ATS22D75Q has a 75 A starter rating.
What supply voltage does it support?
The model is designed for a 230–440 V AC three-phase supply.
What is the control voltage?
The control circuit operates at 230 V AC.
What motor power is suitable for the ATS22D75Q?
The model is suitable for motor applications up to approximately 37 kW at 400/440 V, depending on the application and operating conditions.
Does the ATS22D75Q have an internal bypass?
Yes. The soft starter incorporates an internal bypass function.
Does it support Modbus?
Yes. The ATS22D75Q supports Modbus communication through an RS-485 interface.
What are the physical dimensions?
The dimensions are 295 × 145 × 207 mm.
How much does the ATS22D75Q weigh?
The specified weight is 12 kg.
Is the ATS22D75Q a variable frequency drive?
No. The ATS22D75Q is a soft starter. It is intended primarily for controlled motor starting and stopping rather than continuous speed regulation.
What applications are suitable for this model?
Typical applications include pumps, fans, compressors, conveyors, ventilation equipment and other fixed-speed industrial motor applications.
What should be checked before replacing the unit?
The motor voltage, motor current, motor power, control voltage, load type, starting conditions, protection system, communication requirements and physical installation should all be checked before selecting a replacement.
Conclusion
The Schneider ATS22D75Q Soft Starter is a practical industrial motor-control solution for applications requiring smooth and controlled starting of three-phase asynchronous motors. With a 75 A starter rating, 230–440 V AC supply range, 230 V AC control circuit, internal bypass and Modbus communication capability, it can be integrated into a wide range of industrial automation and motor-control systems.
The controlled starting process helps reduce electrical inrush current and mechanical shock, making the ATS22D75Q particularly useful for pumps, fans, compressors, conveyors and material-handling equipment.
With dimensions of 295 × 145 × 207 mm and a weight of 12 kg, the ATS22D75Q is suitable for vertical installation in industrial control cabinets and motor control centers.
When integrated with PLCs, HMIs, circuit breakers, motor protection devices and industrial communication networks, the ATS22D75Q provides a dependable motor starting solution that can contribute to improved equipment reliability, reduced mechanical stress and more stable industrial operation.