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- ATS48C17Q
- Soft Starter
- France
- 340 x 200 x 265 mm
- 12.4 kg
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Product Overview
The Schneider ATS48C17Q Soft Starter is an industrial motor-control device in the Altistart 48 family. It is designed for controlled starting and stopping of three-phase asynchronous motors used in industrial machinery, production equipment, and process systems.
A conventional direct-on-line starter applies the available supply directly to the motor, which can result in a high starting current and an abrupt increase in motor torque. The ATS48C17Q provides controlled motor acceleration to make the transition from standstill to operating speed more gradual.
This approach can reduce mechanical shock on connected equipment such as couplings, gearboxes, belts, pumps, fans, compressors, and conveyors. Depending on the application and configuration, controlled stopping can also be used where a gradual reduction in motor operation is desirable.
The ATS48C17Q can be integrated into industrial automation systems through its communication capability, allowing it to work alongside PLCs, HMIs, DCS systems, and other control equipment.
The specified physical dimensions are 340 × 200 × 265 mm, with a weight of 12.4 kg.
Product Identification
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Family | Altistart 48 |
| Model | ATS48C17Q |
| Product Type | Soft Starter |
| Motor Type | Three-Phase Asynchronous Motor |
| Main Function | Controlled Motor Starting and Stopping |
| Communication | Modbus |
| Communication Interface | RS-485 |
| Installation Orientation | Vertical |
| Dimensions | 340 × 200 × 265 mm |
| Weight | 12.4 kg |
| Cooling | Forced Air |
| Typical Applications | Pumps, Fans, Compressors, Conveyors, Mixers |
| Automation Integration | PLC / HMI / DCS |
Technical Specifications
| Technical Item | ATS48C17Q |
|---|---|
| Manufacturer | Schneider Electric |
| Series | Altistart 48 |
| Model | ATS48C17Q |
| Product Category | Motor Soft Starter |
| Application | Three-Phase Asynchronous Motor Control |
| Primary Function | Controlled Starting and Stopping |
| Communication | Modbus |
| Physical Communication | RS-485 |
| Mounting | Vertical |
| Height | 340 mm |
| Width | 200 mm |
| Depth | 265 mm |
| Weight | 12.4 kg |
| Cooling Method | Forced Air |
| Typical Load Types | Pumps, Fans, Compressors, Conveyors, Mixers |
| Control Architecture | PLC / HMI / DCS / Industrial Automation |
The ATS48C17Q is intended to be installed as part of a properly engineered motor-control system. The final application should always consider the actual motor rating, operating duty, starting frequency, load characteristics, and environmental conditions.
Understanding the ATS48C17Q
The ATS48C17Q is positioned between the electrical supply and the motor within a motor-control installation.
A simplified architecture is:
Three-Phase Power Supply
↓
Protection and Isolation
↓
ATS48C17Q Soft Starter
↓
Three-Phase Motor
↓
Mechanical Load
During startup, the soft starter controls the motor’s acceleration rather than allowing an uncontrolled direct connection to full operating conditions.
This can provide several practical benefits:
- Reduced mechanical shock
- Smoother motor acceleration
- Reduced stress on transmission components
- Improved starting behavior
- Reduced process disturbance
- Controlled stopping when required
- Integration with industrial control systems
Working Principle
When a motor is started directly, the initial electrical demand can be considerably higher than its normal running condition. At the same time, the motor can generate a rapid torque increase.
The ATS48C17Q manages the startup sequence through controlled power switching.
The general process is:
Start Command
↓
Soft-Start Sequence
↓
Controlled Motor Acceleration
↓
Normal Running
↓
Stop Command
↓
Controlled Stop Sequence
The exact configuration should be established according to the motor and mechanical load.
Core Functions
Controlled Starting
Controlled acceleration is the primary function of the ATS48C17Q.
A gradual starting process can be useful when direct-on-line starting causes:
- Mechanical shock
- Belt movement
- Coupling stress
- Gearbox impact
- Pipeline disturbances
- Excessive process vibration
Controlled Stopping
Some applications require more than simply removing motor power.
Controlled stopping can be useful for selected:
- Pump systems
- Conveyor systems
- Fans
- High-inertia machinery
- Process equipment
The appropriate stop mode should be selected according to the machine’s mechanical and process requirements.
Motor Monitoring and Protection
The Altistart 48 platform provides functions intended to monitor motor and starter operating conditions.
Potential abnormal conditions can include:
- Excessive current
- Motor thermal stress
- Starter temperature problems
- Phase-related problems
- Abnormal starting behavior
Protection settings should be configured based on the actual motor nameplate and application requirements.
Industrial Applications
Pump Applications
Pumps are among the common applications where controlled motor starting can be valuable.
Potential applications include:
- Water circulation
- Cooling systems
- Industrial process pumps
- Transfer pumps
- Water treatment
- Wastewater systems
A controlled start can help reduce sudden mechanical and fluid-system changes.
Fan and Blower Systems
Large fans and blowers may have considerable rotating inertia.
Typical applications include:
- Industrial ventilation
- Exhaust equipment
- Cooling systems
- Dust collection
- Air-handling equipment
- Process ventilation
The ATS48C17Q can provide controlled acceleration for suitable motor and fan combinations.
Compressor Applications
Compressors can impose significant starting requirements on their motors.
Before selecting or configuring the ATS48C17Q for a compressor, engineers should evaluate:
- Motor current
- Compressor load
- Starting time
- Starting frequency
- Ambient temperature
- Mechanical resistance
- Operating cycle
Conveyor Systems
Conveyors can experience mechanical shock when large motors start abruptly.
Controlled acceleration can help reduce stress on:
- Belts
- Couplings
- Gearboxes
- Shafts
- Drive components
It can also help reduce sudden movement of the conveyed material.
Mixer Systems
Mixers can present high starting resistance, especially when handling dense or viscous materials.
Controlled motor acceleration can provide a more gradual transition from stationary operation to the normal process speed.
Industrial Processing Machinery
Other possible applications include:
- Blowers
- Material-handling machines
- Rotating process equipment
- Industrial ventilation
- Production machinery
- Mechanical drive systems
Application suitability must be evaluated using the actual motor and load characteristics.
Installation Guide
1. Confirm the Product
Before installation, verify the identification:
Schneider ATS48C17Q
Inspect the unit for visible damage.
Check for:
- Cracks
- Damaged terminals
- Bent mounting points
- Loose components
- Moisture
- Dust contamination
- Discoloration
- Signs of overheating
Any damaged equipment should be evaluated before installation.
2. Collect Motor Nameplate Data
Before configuration, record the motor’s actual:
- Rated voltage
- Rated current
- Rated frequency
- Rated power
- Connection type
- Speed
- Duty
- Starting characteristics
The ATS48C17Q should be matched to the motor and application rather than selected only by physical size.
3. Design the Control Cabinet
The specified ATS48C17Q dimensions are:
340 × 200 × 265 mm
The cabinet must provide more than the exact physical footprint.
Allow space for:
- Power cables
- Control wiring
- Communication wiring
- Cable bending
- Ventilation
- Protective components
- Maintenance
- Inspection
The surrounding components should not obstruct the soft starter’s cooling path.
4. Mounting Position
The ATS48C17Q should be mounted in the recommended vertical orientation.
Confirm:
- Panel strength
- Correct orientation
- Stable mounting
- Ventilation clearance
- Cable accessibility
- Maintenance access
The unit weighs 12.4 kg, so the mounting structure must safely support the equipment.
5. Environmental Preparation
The enclosure should provide appropriate protection against industrial environmental conditions.
Avoid installation where the equipment is directly exposed to:
- Water
- Condensation
- Excessive dust
- Conductive particles
- Oil mist
- Corrosive substances
- Excessive vibration
- Excessive heat
Adequate cabinet cooling is essential for reliable operation.
6. Isolate Electrical Power
Before wiring:
- Disconnect all relevant power sources.
- Apply lockout/tagout procedures.
- Verify absence of hazardous voltage.
- Isolate the motor.
- Check for stored energy.
- Confirm the work area is safe.
- Wear appropriate electrical PPE.
Never perform power-terminal work on an energized system.
7. Power Circuit Installation
Connect the incoming three-phase supply and motor circuit according to the engineered electrical design.
Inspect:
- Phase connections
- Cable sizing
- Protective devices
- Grounding
- Terminal connections
- Cable insulation
- Cable routing
Perform a complete visual inspection before energization.
8. Control Circuit Installation
The control circuit may include:
- Start command
- Stop command
- Reset
- Run status
- Fault indication
- External interlocks
- PLC control
- Emergency-stop logic
Control wiring should be organized to reduce interference from high-current power conductors.
9. Communication Installation
The ATS48C17Q can be integrated into an automation network using its communication capability.
A typical arrangement is:
PLC
↓
RS-485 / Modbus
↓
ATS48C17Q
↓
Motor
Before commissioning, check:
- Network wiring
- Device address
- Communication parameters
- PLC configuration
- Network topology
- Control permissions
10. Parameter Configuration
Enter the actual motor information into the soft starter.
Important parameters can include:
- Motor rated current
- Starting parameters
- Acceleration time
- Deceleration time
- Current limitation
- Protection settings
- Stop mode
- Command source
Avoid copying parameters from an unrelated machine.
11. Mechanical Inspection
Before the first motor start, inspect the complete mechanical system.
Check:
- Motor shaft
- Coupling
- Bearings
- Gearbox
- Belts
- Pump
- Fan
- Conveyor
- Mechanical guards
Verify that the motor can rotate without unexpected resistance.
Commissioning Procedure
Pre-Energization Checklist
Before applying power:
- Confirm the ATS48C17Q model.
- Verify motor nameplate information.
- Inspect power wiring.
- Inspect control wiring.
- Verify grounding.
- Check protective equipment.
- Check cabinet ventilation.
- Verify starter parameters.
- Test interlocks.
- Check emergency-stop functions.
Initial Energization
After completing the inspection:
- Energize the control system.
- Observe the soft-starter status.
- Check for faults.
- Verify control inputs.
- Confirm communication if used.
- Confirm the correct operating mode.
Do not immediately place the motor under full process load if commissioning conditions allow a controlled initial test.
First Motor Start
Perform the first start under controlled conditions.
Monitor:
- Starting current
- Acceleration time
- Motor sound
- Vibration
- Starter status
- Motor rotation
- Mechanical movement
- Process response
If abnormal conditions appear, stop the motor and investigate.
Troubleshooting Guide
Problem 1 – No Power or No Status
Possible Causes
- Incoming power unavailable
- Open circuit protection
- Incorrect power wiring
- Control circuit problem
- Internal equipment fault
Checks
Verify:
- Incoming supply
- Protective devices
- Power wiring
- Control circuit
- Starter status
Problem 2 – Start Command Is Present but Motor Does Not Run
Possible Causes
- Incorrect control wiring
- Active interlock
- Incorrect command source
- Incorrect configuration
- Motor circuit problem
- Mechanical obstruction
Diagnostic Approach
Trace the command from the PLC or control device to the ATS48C17Q.
Then verify the motor power circuit and mechanical load.
Problem 3 – Motor Accelerates Too Slowly
Possible Causes
- Acceleration time configured too long
- Current limitation too restrictive
- Incorrect motor data
- Excessive load
- Mechanical resistance
Corrective Action
Verify motor parameters and starting settings.
Then inspect the mechanical load.
Problem 4 – Excessive Starting Current
Possible Causes
- Acceleration time too short
- Current limitation incorrectly configured
- Heavy mechanical load
- Incorrect motor configuration
- Motor condition
Compare the configured motor information with the actual motor nameplate.
Problem 5 – Starter Trips During Startup
Possible Causes
- Motor overload
- Phase problem
- Incorrect wiring
- Incorrect parameters
- Mechanical obstruction
- Excessive load
Do not repeatedly reset the fault without finding the underlying cause.
Problem 6 – ATS48C17Q Overheats
Possible Causes
- Insufficient cabinet ventilation
- Blocked airflow
- High ambient temperature
- Excessive starting frequency
- Motor overload
- Dust accumulation
- Cooling problem
Corrective Action
Inspect the complete cabinet cooling system.
Check whether airflow is restricted and whether another device is introducing excessive heat.
Problem 7 – Motor Vibrates During Startup
Possible Causes
- Shaft misalignment
- Coupling problem
- Bearing wear
- Mechanical imbalance
- Incorrect acceleration profile
- Resonance
Investigate both the motor-control system and the connected machinery.
Problem 8 – Motor Stops Abruptly
Possible Causes
- Incorrect stop mode
- External stop command
- Incorrect deceleration setting
- PLC logic issue
- High-inertia load
Review the complete stopping sequence.
Problem 9 – Motor Does Not Stop
Possible Causes
- Stop command missing
- Control wiring problem
- PLC logic error
- External interlock
- Incorrect configuration
Trace the stop command from the controller to the starter.
Problem 10 – Communication Failure
Possible Causes
- Incorrect Modbus address
- Incorrect serial parameters
- RS-485 wiring problem
- PLC configuration problem
- Network topology issue
- Communication interface fault
Diagnostic Sequence
First inspect the physical communication wiring.
Then verify:
- Device address
- Communication speed
- Serial configuration
- PLC settings
- Network connections
Problem 11 – Repeated Overload Faults
Possible Causes
- Excessive mechanical load
- Bearing deterioration
- Mechanical obstruction
- Incorrect motor parameters
- Excessive starting frequency
- Incorrect protection settings
- Process overload
Repeated overload faults should be investigated as a complete motor-and-load system.
Diagnostic Decision Process
A structured troubleshooting sequence can be used:
Power Supply
↓
Protection
↓
ATS48C17Q Status
↓
Control Commands
↓
Communication
↓
Power Wiring
↓
Motor
↓
Mechanical Load
↓
Parameters
↓
Restart Test
This sequence helps technicians distinguish between power, control, communication, motor, configuration, and mechanical faults.
Preventive Maintenance
Electrical Inspection
Inspect periodically:
- Power terminals
- Control terminals
- Grounding
- Cable insulation
- Signs of heating
- Loose connections
Cooling Inspection
Check:
- Ventilation
- Airflow
- Cooling passages
- Cabinet filters
- Dust accumulation
- Ambient temperature
Mechanical Inspection
Check:
- Mounting hardware
- Cable supports
- Motor alignment
- Couplings
- Bearings
- Gearboxes
- Vibration
Operating Condition Monitoring
Monitor:
- Motor current
- Starting duration
- Starter temperature
- Fault history
- Starting frequency
- Motor vibration
- Abnormal noise
Changes in these values can provide early warning of developing problems.
Preventive Maintenance Table
| Inspection Area | Recommended Action |
|---|---|
| Power Terminals | Inspect tightness and heating |
| Control Terminals | Check connection integrity |
| Grounding | Verify continuity |
| Communication | Inspect RS-485 wiring |
| Cooling | Clean and inspect airflow paths |
| Cabinet Ventilation | Keep airflow unobstructed |
| Filters | Clean or replace when required |
| Motor Current | Monitor operating values |
| Fault History | Review periodically |
| Mounting | Check mechanical stability |
| Cables | Inspect insulation and routing |
| Cabinet | Remove dust and contamination |
| Motor / Load | Check vibration and alignment |
Common Installation Errors
Wrong Motor Information
Incorrect motor parameters can lead to abnormal acceleration, unnecessary trips, or poor motor performance.
Poor Cabinet Ventilation
Insufficient airflow can cause unnecessary thermal stress.
Insufficient Mounting Support
The ATS48C17Q weighs 12.4 kg, so the cabinet mounting structure must be mechanically adequate.
Loose Connections
Loose electrical connections can produce heat, intermittent faults, and voltage problems.
Incorrect Control Logic
A missing start signal or active interlock can prevent motor operation even when the soft starter is functioning correctly.
Incorrect Communication Parameters
Incorrect addressing or serial settings can prevent communication with a PLC.
Mechanical Load Problems
A blocked pump, overloaded conveyor, damaged bearing, or tight gearbox can cause symptoms that appear to be electrical faults.
Repeated Resetting
Resetting the starter repeatedly without correcting the cause can increase downtime and equipment stress.
Automation System Integration
The ATS48C17Q can form part of an industrial motor-control architecture.
A representative configuration is:
PLC / DCS
↓
Control Commands
↓
ATS48C17Q
↓
Motor
↓
Industrial Machine
↓
Process
The communication interface can support integration into supervisory and control architectures where motor status and available diagnostic information need to be exchanged with the automation system.
Possible functions include:
- Remote motor starting
- Remote stopping
- Fault monitoring
- Status monitoring
- Alarm management
- Interlocking
- Diagnostic monitoring
Supporting Equipment
An ATS48C17Q installation may be accompanied by:
- Circuit breakers
- Disconnect devices
- Fuses
- Contactors
- Motor protection equipment
- PLC controllers
- HMIs
- Control relays
- RS-485 network components
- Emergency-stop circuits
- Motor sensors
- Process sensors
The complete system must be engineered around the actual motor, supply, load, protection requirements, and application duty.
Related Altistart 48 Models
| Model | Typical Position in Product Range |
|---|---|
| ATS48C11Q | Higher-current industrial motor control |
| ATS48C14Q | Larger industrial motor applications |
| ATS48C17Q | Higher-power industrial motor applications |
| ATS48C21Q | Larger motor-control applications |
| ATS48C25Q | Higher-current industrial applications |
| ATS48C32Q | High-power motor applications |
Model selection should be based on the motor’s actual current, voltage, starting duty, load characteristics, environmental conditions, and control requirements.
Key Advantages
- Altistart 48 industrial soft-starter platform
- Controlled motor acceleration
- Controlled motor stopping
- Three-phase asynchronous motor applications
- Motor protection functions
- Starter monitoring and protection
- Modbus communication capability
- RS-485 industrial communication
- PLC and DCS integration
- Suitable for pumps
- Suitable for fans and blowers
- Suitable for compressors
- Suitable for conveyors
- Suitable for mixers
- Forced-air cooling
- Vertical installation
- Dimensions: 340 × 200 × 265 mm
- Weight: 12.4 kg
Technical FAQs
What is the Schneider ATS48C17Q?
The Schneider ATS48C17Q is an Altistart 48 industrial soft starter designed for controlled starting and stopping of three-phase asynchronous motors.
What are the dimensions of the ATS48C17Q?
The specified dimensions are 340 × 200 × 265 mm.
What is the weight of the ATS48C17Q?
The specified weight is 12.4 kg.
What is the purpose of the ATS48C17Q?
Its primary purpose is to provide controlled motor starting and stopping while providing monitoring and protection functions for industrial motor applications.
Where can the ATS48C17Q be used?
Typical applications include pumps, fans, compressors, conveyors, blowers, mixers, and other industrial motor-driven machinery.
Can the ATS48C17Q communicate with a PLC?
Yes. The ATS48 platform supports Modbus communication through an RS-485-based industrial network, allowing suitable PLC systems to integrate the soft starter into a control architecture.
Why does the motor fail to start?
Possible causes include missing start commands, active interlocks, incorrect configuration, wiring problems, motor faults, or excessive mechanical resistance.
Why does the soft starter overheat?
Common causes include inadequate ventilation, blocked airflow, high ambient temperature, excessive starting frequency, motor overload, and contamination.
Why does the starter trip during acceleration?
Possible causes include excessive load, incorrect motor parameters, phase-related problems, unsuitable starting settings, wiring faults, or mechanical obstruction.
What should be inspected before commissioning?
Verify the motor nameplate, power circuit, control wiring, grounding, protective devices, cabinet ventilation, communication configuration, soft-starter parameters, and mechanical load.
How can repeated faults be diagnosed?
Start with the incoming power and protective circuit, then inspect the ATS48C17Q status, control commands, communication, motor circuit, motor condition, configuration, and mechanical load. This prevents unnecessary replacement of a functioning soft starter.
Conclusion
The Schneider ATS48C17Q Soft Starter provides controlled starting and stopping for industrial three-phase asynchronous motor applications. It is particularly useful where direct motor starting could produce excessive mechanical shock, high starting demand, or undesirable process disturbances.
The specified ATS48C17Q measures 340 × 200 × 265 mm and weighs 12.4 kg. These dimensions and weight should be considered when designing the electrical cabinet, mounting structure, cable routing, ventilation system, and maintenance access.
Reliable operation depends on correct motor selection, accurate configuration, appropriate electrical protection, sound wiring practices, adequate cooling, and careful commissioning.
When troubleshooting, technicians should diagnose the complete system rather than assuming that a fault indication automatically means the soft starter itself has failed. Checking the supply, protection, control signals, communication, motor, parameters, and mechanical load in sequence provides a more reliable approach to fault identification.
With proper installation, commissioning, preventive maintenance, and systematic troubleshooting, the ATS48C17Q can be integrated effectively into industrial motor-control and automation systems.