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- ATS22D75S6U
- Soft Starter
- France
- x295 x 145 x 207 mm
- 12 kg
- Xiamen, China
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Product Overview
In industrial automation systems, large three-phase motors often require controlled starting to reduce electrical inrush current and mechanical stress. The Schneider ATS22D75S6U Soft Starter is an Altistart 22 series motor-control device designed to provide smooth starting and stopping for three-phase asynchronous motors.
The ATS22D75S6U is particularly suitable for industrial equipment such as pumps, fans, compressors and material-handling machinery. Instead of applying full motor voltage immediately, the soft starter uses torque-controlled starting to progressively accelerate the motor.
This controlled starting process can reduce sudden mechanical loading on shafts, couplings, belts, gearboxes and other connected equipment. It can also help reduce the impact of motor starting on the electrical distribution system.
The ATS22D75S6U has a 75 A starter rating, supports a broad three-phase supply range of approximately 208–600 V, and uses a 110 V AC control circuit. The model is therefore particularly important in installations where a 110 V control supply is required.
The unit includes an internal bypass, Modbus communication, three discrete inputs and two relay outputs. Its physical dimensions are 295 × 145 × 207 mm, with a specified product weight of 12 kg.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Schneider Electric |
| Product Series | Altistart 22 |
| Model | ATS22D75S6U |
| Product Type | Soft Starter |
| Motor Type | Three-Phase Asynchronous Motor |
| Starter Rating | 75 A |
| Rated Supply Voltage | 208–600 V AC |
| Supply Frequency | 50/60 Hz |
| Control Circuit Voltage | 110 V AC |
| Motor Power | 20 HP at 208 V; 25 HP at 230 V; 50 HP at 460 V; 60 HP at 575 V |
| Factory-Set Current | 65 A |
| Starting Method | Torque-Controlled Start |
| Starting Current Limitation | Approximately 3.5 × Motor Current |
| Utilization Category | AC-53A |
| Internal Bypass | Yes |
| Communication Protocol | Modbus |
| Communication Interface | RS-485 |
| Communication Connector | RJ45 |
| Discrete Inputs | 3 |
| Relay Outputs | 2 |
| PTC Probe Input | 750 Ω |
| Cooling Method | Forced Convection |
| Protection Rating | IP20 |
| Installation Position | Vertical ±10° |
| Dimensions | 295 × 145 × 207 mm |
| Weight | 12 kg |
| Typical Applications | Pumps, Fans, Compressors, Material Handling |
Function and Working Principle
The primary function of the ATS22D75S6U is to control the starting and stopping process of three-phase asynchronous motors.
A conventional direct-on-line starter connects the motor directly to the electrical supply. Depending on the motor size and load, this can create a substantial starting current and a sudden torque increase.
The ATS22D75S6U provides a controlled alternative.
A typical arrangement is:
Three-Phase Power Supply
↓
ATS22D75S6U Soft Starter
↓
Three-Phase Asynchronous Motor
↓
Industrial Load
During startup, the ATS22D75S6U regulates motor acceleration using torque control. The starting current is limited to approximately 3.5 times the motor current under the specified starting mode.
This controlled acceleration can help reduce:
- Electrical starting current
- Mechanical shock
- Shaft stress
- Coupling stress
- Belt tension
- Gearbox loading
- Pump pressure fluctuations
- Equipment vibration
The soft starter can also be configured for controlled stopping where the application requires a more gradual shutdown.
What Is the Schneider ATS22D75S6U Used For?
The ATS22D75S6U is used when an industrial motor needs to start smoothly rather than being switched directly across the line.
It is particularly useful for fixed-speed motors where a variable frequency drive is not required.
Typical applications include:
- Water pumps
- Industrial pumps
- Centrifugal pumps
- Fans
- Industrial blowers
- Screw compressors
- Conveyor systems
- Material handling equipment
- HVAC systems
- Ventilation equipment
- Cooling systems
- Manufacturing machinery
- Process equipment
The device is especially useful when sudden motor acceleration could damage the mechanical system or disturb the industrial process.
Role in Industrial Control Systems
The ATS22D75S6U normally operates between the electrical power distribution system and the motor.
A typical industrial motor-control system can be arranged as:
Main Electrical Supply
↓
Circuit Breaker / Protection
↓
ATS22D75S6U
↓
Three-Phase Motor
↓
Pump / Fan / Compressor / Conveyor
A PLC can send start and stop commands to the soft starter, while the ATS22D75S6U manages the actual motor-starting process.
This allows the PLC to focus on production logic and process control while the soft starter manages motor acceleration and associated protection functions.
The integrated Modbus interface can also be used when the soft starter needs to exchange operating information with a PLC, HMI or supervisory control system.
Motor Power Applications
The ATS22D75S6U is a 75 A soft starter with different motor power capabilities depending on the supply voltage.
| Motor Supply | Typical Motor Rating |
|---|---|
| 208 V AC | 20 HP |
| 230 V AC | 25 HP |
| 460 V AC | 50 HP |
| 575 V AC | 60 HP |
The actual application should always be evaluated according to motor rated current, load characteristics, starting frequency, ambient conditions and installation method.
Motor horsepower alone should not be used as the only criterion for selecting a soft starter.
Industrial Applications
The Schneider ATS22D75S6U can be used in many industrial motor-control applications.
Pump Systems
The soft starter can be used for:
- Water pumps
- Process pumps
- Cooling-water pumps
- Wastewater pumps
- Industrial circulation pumps
- Centrifugal pumps
Controlled acceleration can help reduce sudden pressure changes and mechanical loading.
Fan and Blower Systems
The ATS22D75S6U can provide smoother startup for:
- Industrial fans
- Ventilation systems
- HVAC equipment
- Process blowers
- Air-handling equipment
This is especially useful for large rotating assemblies with high inertia.
Compressor Systems
The soft starter can also be applied to compatible compressor motors, including:
- Screw compressors
- Industrial air compressors
- Process compressors
Controlled acceleration helps reduce sudden torque loading during motor startup.
Conveyor Systems
For material-handling equipment, gradual acceleration can help reduce:
- Belt shock
- Product movement
- Coupling stress
- Gearbox loading
- Motor starting stress
This makes the ATS22D75S6U suitable for many fixed-speed conveyor applications.
Internal Bypass Function
The ATS22D75S6U includes an internal bypass.
During motor startup, the electronic switching section controls the motor acceleration. After the motor reaches normal operating conditions, the bypass function reduces the continuous operating burden on the semiconductor section.
This can reduce heat generation and improve thermal conditions inside the control cabinet.
For systems containing multiple motor starters, reduced heat dissipation can be particularly beneficial for overall cabinet thermal management.
Communication and Control
The ATS22D75S6U provides Modbus communication through an RS-485 serial interface.
The communication interface uses an RJ45 connector.
This allows the soft starter to be integrated into a wider industrial automation network.
Typical communication functions can include:
- Motor status monitoring
- Fault monitoring
- Remote supervision
- Operating-state monitoring
- Parameter management
- PLC integration
- Centralized motor control
The unit also provides three discrete inputs and two relay outputs, giving engineers both network-based and hardwired control options.
Protection and Monitoring
The ATS22D75S6U includes protection and monitoring functions designed for industrial motor applications.
Important monitoring areas include:
- Line phase failure
- Motor thermal protection
- Starter thermal protection
- Motor current
- Starting conditions
- Fault status
- Operating status
The unit also provides a 750 Ω PTC probe input for compatible motor temperature monitoring applications.
These functions can help identify abnormal motor conditions before they result in more serious equipment problems.
Installation and System Integration
Mechanical Installation
The ATS22D75S6U has the following physical dimensions:
295 × 145 × 207 mm
The specified product weight is:
12 kg
The soft starter is designed for vertical installation with an operating position of approximately ±10°.
Adequate ventilation should be maintained around the unit because forced convection is used for cooling.
Electrical Installation
A typical installation includes:
- Three-phase incoming power
- Motor output connections
- Protective grounding
- 110 V control supply
- PLC control wiring
- Motor protection equipment
- Modbus communication wiring when required
Correct electrical protection, cable selection and grounding are essential for reliable operation.
Installation and Commissioning
A typical ATS22D75S6U commissioning procedure includes:
- Verify the model number.
- Confirm the motor rated voltage.
- Confirm the motor rated current.
- Check the motor horsepower.
- Verify the 110 V AC control supply.
- Install the soft starter vertically.
- Connect the three-phase power supply.
- Connect the motor.
- Verify protective grounding.
- Configure motor parameters.
- Configure starting parameters.
- Configure stopping parameters.
- Verify control inputs.
- Verify relay outputs.
- Configure Modbus communication if required.
- Perform an initial motor startup.
- Monitor motor current.
- Check acceleration behavior.
- Test under normal load.
- Verify protection and fault functions.
The final settings should be based on the actual motor and driven equipment.
Compatible System Components
The ATS22D75S6U can operate together with several types of industrial control and electrical components.
| Component | Function |
|---|---|
| PLC Controller | Motor sequencing and process control |
| HMI | Operator control and monitoring |
| Circuit Breaker | Short-circuit protection |
| Motor Protection Device | Motor protection |
| Contactor | Electrical isolation |
| Three-Phase Motor | Main 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 | Physical equipment installation |
These components can be combined according to the requirements of the overall automation system.
Maintenance and Troubleshooting
Regular maintenance can improve the long-term reliability of the ATS22D75S6U.
Recommended checks include:
- Inspect power terminals.
- Check motor wiring.
- Verify grounding.
- Inspect cooling passages.
- Check ventilation.
- Remove accumulated dust.
- Inspect control wiring.
- Check Modbus communication cables.
- Monitor motor current.
- Review fault conditions.
- Verify acceleration behavior.
- Confirm configuration parameters.
Particular attention should be paid to ventilation and heat dissipation in high-temperature industrial environments.
Common Fault Conditions
| Symptom | Possible Cause |
|---|---|
| Motor does not start | Power supply or control signal problem |
| Control circuit inactive | Incorrect 110 V control supply |
| Excessive starting current | Incorrect motor or starting configuration |
| Motor starts too quickly | Acceleration settings require adjustment |
| Motor starts too slowly | Excessive load or incorrect parameters |
| Soft starter trips | Protection condition or excessive motor load |
| Motor overheats | Excessive load or insufficient cooling |
| Repeated thermal faults | Excessive starting frequency |
| Communication failure | RS-485 wiring or Modbus configuration |
| Unexpected motor stop | Protection function or external command |
| No status feedback | Relay wiring or configuration issue |
| Abnormal acceleration | Motor parameter or mechanical-load problem |
Before replacing the ATS22D75S6U, engineers should inspect the motor, incoming power, control supply, wiring, protection devices and mechanical load.
Recommended Alternative Models
| Model | Product Type | Key Feature | Typical Application |
|---|---|---|---|
| ATS22D62S6U | Soft Starter | 62 A class with 110 V control | Pumps and fans |
| ATS22D75S6 | Soft Starter | 75 A class with 230 V control | Industrial motor control |
| ATS22D75Q | Soft Starter | 75 A class with alternate supply configuration | Motor starting |
| ATS22D88S6U | Soft Starter | Higher-current 110 V control version | Larger motors |
| ATS22C11S6U | Soft Starter | Higher-power motor starting | Process equipment |
| ATS22C17S6U | Soft Starter | Large motor starting | Heavy industrial systems |
| ATS48 Series | Soft Starter | Advanced motor starting functions | Industrial process applications |
| ATS430D75S6 | Soft Starter | Newer-generation 75 A platform | Modern motor control |
| ATV630 | Variable Frequency Drive | Continuous speed regulation | Pumps and process systems |
| ATV650 | Variable Frequency Drive | Process-oriented drive control | Industrial automation |
For a new system, the ATS430D75S6 can be evaluated as a newer-generation alternative for 75 A applications. However, the control voltage, motor current, supply voltage, load type and installation requirements should be verified before replacement.
Key Advantages
- Schneider Electric Altistart 22 series
- 75 A starter rating
- Three-phase asynchronous motor control
- 208–600 V AC supply range
- 110 V AC control circuit
- Torque-controlled starting
- Starting current limitation
- Internal bypass
- Modbus communication
- RS-485 interface
- RJ45 communication connector
- Three discrete inputs
- Two relay outputs
- 750 Ω PTC probe input
- Motor thermal protection
- Starter thermal protection
- Phase-failure protection
- Forced-convection cooling
- IP20 protection
- Vertical installation
- Suitable for pumps and fans
- Suitable for compressors and conveyors
- 295 × 145 × 207 mm
- 12 kg
Technical FAQs
What is the Schneider ATS22D75S6U?
The ATS22D75S6U is a Schneider Electric Altistart 22 soft starter designed to provide controlled starting and stopping for three-phase asynchronous motors.
What is the rated current of the ATS22D75S6U?
The starter rating is 75 A.
What supply voltage does the ATS22D75S6U support?
The model is designed for a broad three-phase supply range of approximately 208–600 V AC, with the actual motor power capability depending on the operating voltage.
What is the control voltage?
The ATS22D75S6U uses a 110 V AC control circuit.
What motor ratings are associated with this model?
Typical ratings include 20 HP at 208 V, 25 HP at 230 V, 50 HP at 460 V and 60 HP at 575 V.
Does the ATS22D75S6U have an internal bypass?
Yes. The unit includes an internal bypass function.
Does it support Modbus communication?
Yes. The ATS22D75S6U supports Modbus communication through an RS-485 serial interface.
What are the dimensions?
The dimensions are 295 × 145 × 207 mm.
How much does the ATS22D75S6U weigh?
The specified product weight is 12 kg.
Is the ATS22D75S6U a variable frequency drive?
No. It is a soft starter. Its primary function is controlled motor starting and stopping rather than continuous variable-speed operation.
What is the difference between ATS22D75S6U and ATS22D75S6?
The main control-system difference is the control supply: ATS22D75S6U uses 110 V AC control, while ATS22D75S6 uses 230 V AC control. This difference is important when selecting a replacement or integrating the unit into an existing control cabinet.
What equipment can be connected to the ATS22D75S6U?
The soft starter can be integrated with PLCs, HMIs, circuit breakers, motor protection devices, contactors, three-phase motors, PTC sensors and Modbus-based industrial control systems.
What applications are suitable for the ATS22D75S6U?
Typical applications include pumps, fans, compressors, conveyors, material-handling systems, HVAC equipment, ventilation systems and other fixed-speed industrial machinery.
Conclusion
The Schneider ATS22D75S6U Soft Starter is a 75 A industrial motor-control device designed to provide smooth starting and stopping for three-phase asynchronous motors. Its broad 208–600 V AC supply range, 110 V AC control circuit, torque-controlled starting, internal bypass and Modbus communication make it suitable for a wide range of industrial automation applications.
The ATS22D75S6U is particularly useful for pumps, fans, compressors, conveyors and material-handling equipment, where uncontrolled motor starting can cause excessive electrical current or mechanical shock.
With dimensions of 295 × 145 × 207 mm and a weight of 12 kg, the unit is suitable for vertical installation in industrial control cabinets and motor-control systems.
For engineers and system integrators, one of the most important characteristics of the ATS22D75S6U is its 110 V control circuit, which distinguishes it from closely related models such as the ATS22D75S6. Proper matching of the control voltage, motor rating, supply voltage and load characteristics is therefore essential when installing or replacing this soft starter.