Product Overview

The Schneider Electric ATS48C17Y Altistart 48 Soft Starter is an industrial motor-starting and stopping device designed for three-phase asynchronous motors. It belongs to Schneider Electric’s Altistart 48 series, a product family developed for applications requiring controlled motor acceleration, reduced starting stress, and reliable stopping performance.

When a large motor starts directly across the power supply, it can draw a high inrush current and generate significant mechanical stress. These conditions may affect electrical distribution systems, motor windings, couplings, belts, pumps, and other connected equipment. A soft starter helps manage the starting process by controlling the voltage applied to the motor during acceleration.

The ATS48C17Y supports a wide supply-voltage range of 208–690 V AC and has a rated starter current of 156 A. Depending on supply voltage and application duty, it can be used with motors in a broad power range. Its published motor ratings include 90 kW at 400 V for standard applications and 75 kW at 400 V for severe-duty applications.

The Altistart 48 uses torque-control starting and stopping technology. It is designed for demanding motor applications, particularly pumping, ventilation, and industrial machinery. Its functions include motor thermal protection, starter thermal protection, and phase-failure monitoring.

Unlike a variable frequency drive, a soft starter primarily controls the motor during starting and stopping. It does not provide continuous variable-speed regulation during normal operation. Once the motor reaches its operating condition, the application generally runs at the supply frequency.

The ATS48C17Y is suitable for industrial installations where controlled starting, motor protection, and reduced mechanical stress are important. It is also relevant to maintenance and replacement projects involving existing Altistart 48 installations.

Technical Specifications

Note: Motor power ratings depend on supply voltage and whether the application is standard duty or severe duty. Always check the motor nameplate, load characteristics, and manufacturer’s selection tables before choosing a starter.

Function and Working Principle

The ATS48C17Y controls the motor’s starting and stopping process by regulating the electrical conditions applied to the motor. Its torque-control technology is designed to provide smoother acceleration and deceleration than direct-on-line starting.

1. Controlled Motor Starting

When a motor starts directly across the supply, it may draw several times its rated operating current. This can cause voltage dips and place additional stress on electrical equipment.

The ATS48C17Y gradually controls the motor’s starting process. By managing the applied voltage and motor torque, it helps reduce abrupt acceleration and the mechanical impact associated with direct starting.

This function is particularly useful for large pumps, fans, compressors, and industrial machines that require a controlled start.

2. Torque Control

The Altistart 48 uses torque-control technology to manage motor acceleration. Rather than relying only on a simple voltage ramp, the starter adjusts its operation to control the torque developed by the motor.

This approach can help reduce sudden mechanical movement and improve starting behavior under changing load conditions.

The effectiveness of torque control depends on correct motor data, starter settings, supply conditions, and the mechanical characteristics of the application.

3. Soft Stopping

The ATS48C17Y also supports controlled motor stopping. Instead of immediately disconnecting the motor from the supply, it can manage the stopping process according to configured parameters.

For pump applications, controlled stopping can help reduce sudden changes in fluid flow and pressure. This may help limit water hammer and reduce stress on pipes, valves, and connected equipment.

The required stopping profile depends on the process and should be configured according to the equipment manufacturer’s recommendations.

4. Current Limitation

The starter provides current-limiting control during motor acceleration. This helps manage the electrical demand associated with starting large motors.

The appropriate current limit must be selected according to the motor’s rated current, load torque, and required acceleration time. An excessively low setting may prevent the motor from accelerating correctly.

5. Motor Thermal Protection

Motor thermal protection helps monitor the motor’s operating condition and protect against excessive thermal loading.

Correct configuration is important because the starter must be set according to the motor’s rated current and operating characteristics. Thermal protection should be considered alongside the motor’s own protection requirements and the complete electrical installation.

6. Starter Thermal Protection

The ATS48C17Y also incorporates thermal protection for the starter itself. This helps manage the thermal conditions of the power components during operation.

Adequate ventilation, correct mounting clearances, and appropriate operating conditions are still necessary to maintain reliable performance.

Role in Industrial Control Systems

The ATS48C17Y can be integrated into industrial motor-control panels and PLC-based automation systems. It typically operates between the electrical supply and the motor, while receiving control commands from local operator devices or a higher-level control system.

PLC Integration

A programmable logic controller can coordinate the soft starter with sensors, valves, contactors, interlocks, and other process equipment.

For example, a PLC may issue a start command when a pump is required to operate and monitor the starter’s status during the starting sequence. If a fault occurs, the PLC can use the available status information to trigger an alarm or initiate a protective sequence.

The exact integration method depends on the control terminals, communication configuration, and application wiring.

HMI and Operator Control

A human-machine interface can provide operators with a convenient way to monitor motor operation and manage equipment commands.

In a typical installation, an HMI communicates with the PLC or an appropriate communication interface. Operators may be able to view starter status, alarms, and process conditions through the system’s configured interface.

The communication and control architecture should be confirmed before installation.

Motor Protection Coordination

The soft starter forms part of the motor’s overall protection arrangement. It should be coordinated with upstream circuit breakers or fuses, motor protection devices, contactors, and the electrical distribution system.

Proper coordination helps ensure that the starter operates within its rated limits and that faults can be isolated appropriately.

Industrial Communication

The Altistart 48 family supports communication with industrial control systems through suitable interfaces. Modbus communication may be used to exchange operating information and commands, depending on the installed configuration and wiring.

Communication settings, addressing, and PLC programming must be verified during commissioning.

Industrial Applications

The ATS48C17Y is designed for industrial motor-starting applications involving relatively high motor currents. Its controlled starting and stopping functions make it particularly relevant to pumping, ventilation, and heavy industrial machinery.

1. Industrial Pumping Systems

Pumps are among the important applications for the Altistart 48 series. Starting a large pump abruptly can create pressure fluctuations and mechanical stress throughout the pipe network.

The ATS48C17Y can provide controlled acceleration and stopping, helping manage changes in pump torque and fluid movement.

Typical applications include:

• Industrial water circulation systems.
• Water treatment plants.
• Process-water pumping stations.
• Cooling-water systems.
• Industrial transfer pumps.

2. Ventilation and Fan Systems

Large ventilation fans may require substantial starting current and generate significant mechanical forces during acceleration.

A soft starter can help control the motor’s acceleration and reduce sudden mechanical loading. This is useful in industrial ventilation systems, air-handling equipment, and process exhaust installations.

The starter must be selected according to the fan motor’s current, starting torque, and operating duty.

3. Industrial Compressors

Some industrial compressors use large asynchronous motors that require controlled starting. A soft starter can help manage the motor’s acceleration and reduce the electrical and mechanical impact of starting.

The compressor’s unloading arrangement, starting torque, and operating sequence must be considered when configuring the starter.

4. Conveyor Systems

Large conveyor systems may experience significant mechanical stress during startup, especially when carrying material.

The ATS48C17Y can provide controlled motor acceleration, helping reduce abrupt movement and mechanical shock in suitable applications.

For systems requiring precise speed adjustment during production, a variable frequency drive may be more appropriate than a soft starter.

5. Industrial Processing Equipment

The starter can also be used with compatible motors in industrial processing machinery, material-handling equipment, and auxiliary production systems.

Its suitability depends on the motor’s rated current, supply voltage, duty classification, starting frequency, and load characteristics.

Installation and System Integration

Correct installation is essential for safe operation and reliable motor starting. The ATS48C17Y should be installed according to the manufacturer’s instructions and applicable electrical standards.

1. Verify Supply Voltage

The ATS48C17Y supports a three-phase supply range of 208–690 V AC. Confirm the actual incoming supply voltage before connecting the equipment.

The motor voltage and starter selection must also match. A mismatch between the supply, motor, and starter ratings can cause incorrect operation or equipment damage.

2. Confirm Motor Current and Duty

The rated starter current is 156 A. Motor selection must account for the motor’s full-load current and the application’s operating duty.

Standard-duty and severe-duty applications have different motor power ratings. For example, at 400 V, the published motor ratings are 90 kW for standard duty and 75 kW for severe duty.

The correct selection should consider:

• Motor nameplate current.
• Starting torque requirements.
• Load inertia.
• Starting frequency.
• Acceleration time.
• Ambient temperature.
• Operating altitude.
• Cooling and ventilation conditions.

3. Panel Mounting and Dimensions

The supplied dimensions are 340 × 200 × 265 mm, with a weight of 12.4 kg.

The manufacturer identifies the ATS48C17Y as a Size C Altistart 48 unit, with approximate dimensions of 200 mm width, 340 mm height, and 265 mm depth.

Allow sufficient space for ventilation, cable connections, maintenance access, and heat dissipation. The starter should not be installed in an enclosure where airflow is restricted or ambient temperature exceeds the permitted operating conditions.

4. Power Wiring

The incoming supply and motor output connections must be installed according to the manufacturer’s wiring diagrams.

Use correctly rated conductors, terminals, protective devices, and grounding arrangements. Keep power wiring properly organized and ensure that all connections are tightened according to the specified torque values.

Electrical work must be carried out by qualified personnel using appropriate isolation and verification procedures.

5. Control Wiring

Connect the control supply and external command circuits according to the selected control arrangement.

The ATS48C17Y uses a 110–230 V AC control supply. Verify the control voltage before energizing the unit.

PLC outputs, push buttons, emergency-stop circuits, and interlocks must be designed to meet the requirements of the complete machine-control system.

6. Parameter Configuration

During commissioning, configure the starter according to the motor and application.

Important parameters may include:

• Motor rated current.
• Current limit.
• Starting torque.
• Acceleration settings.
• Deceleration settings.
• Motor thermal protection.
• Operating mode.
• Fault response.

Incorrect settings can cause starting difficulties, excessive current, nuisance trips, or inadequate motor protection.

7. Commissioning and Functional Testing

After installation, inspect the wiring, grounding, protective devices, and control connections.

Perform controlled tests to verify motor rotation, starting performance, acceleration, stopping behavior, and fault response.

For pump applications, check pressure behavior during starting and stopping. For conveyor and fan applications, verify that the mechanical load operates smoothly throughout the starting sequence.

Record the final parameter settings for future maintenance and replacement work.

Compatible System Components

The ATS48C17Y is normally used as part of a complete motor-control installation. The following components may be incorporated depending on the application.

These components are examples of equipment used in a complete motor-control system. They are not necessarily supplied with the ATS48C17Y.

Alternative Models and Replacement Considerations

The ATS48C17Y has been discontinued. Schneider Electric identifies the ATS480C17Y Altivar Soft Starter as its recommended replacement.

Although the ATS480C17Y is intended for a similar motor-control application, replacement should not be treated as a simple component exchange without checking the electrical and control requirements.

Before selecting a replacement, compare:

• Rated supply voltage and frequency.
• Starter current rating.
• Standard-duty and severe-duty motor ratings.
• Control supply voltage.
• Starting and stopping requirements.
• Motor thermal protection settings.
• Communication interfaces.
• Control terminal assignments.
• Dimensions and mounting requirements.
• PLC and HMI integration.
• Upstream protective-device coordination.

When upgrading to the ATS480C17Y, engineers should review the manufacturer’s replacement documentation and confirm wiring, parameter, and commissioning requirements.

Key Advantages

Controlled Motor Starting

The ATS48C17Y helps manage motor acceleration and reduce the abrupt electrical and mechanical effects associated with direct-on-line starting.

Torque-Control Technology

Its torque-control starting method provides a controlled approach to motor acceleration and is useful in applications where mechanical stress must be managed.

Soft Stopping Capability

Controlled stopping can help reduce sudden mechanical changes. In suitable pumping systems, it can also help manage pressure fluctuations.

Integrated Motor Thermal Protection

Motor thermal protection supports the monitoring of operating conditions and helps protect the motor against excessive thermal loading.

Starter Thermal Protection

Integrated starter thermal protection helps manage the operating temperature of the power electronics.

Wide Voltage Range

The 208–690 V AC supply range supports use in a variety of industrial electrical systems, subject to correct motor and starter selection.

Industrial Communication Capability

The Altistart 48 platform supports integration with automation systems through suitable communication arrangements, including Modbus.

Established Industrial Application

The Altistart 48 series has been used in pumping, ventilation, and industrial machinery. Its technical characteristics make the ATS48C17Y relevant to maintenance and replacement projects involving existing equipment.

Technical FAQs

1. What is the Schneider Electric ATS48C17Y?

The ATS48C17Y is an Altistart 48 soft starter designed for controlled starting and stopping of three-phase asynchronous motors.

2. What is the rated current of the ATS48C17Y?

Its rated starter current (Icl) is 156 A. Motor selection should also consider the application duty and the motor’s rated current.

3. What is the input voltage range?

The ATS48C17Y supports a three-phase supply voltage range of 208–690 V AC, with a specified voltage tolerance of -15% to +10%.

4. What motor power can it support?

Its published motor power range is 37–160 kW, depending on supply voltage and application duty. At 400 V, the listed ratings are 90 kW for standard applications and 75 kW for severe-duty applications.

5. What is the difference between a soft starter and a variable frequency drive?

A soft starter mainly controls the motor during starting and stopping. A variable frequency drive can continuously adjust motor speed by changing the output frequency.

If an application only requires controlled starting and stopping, a soft starter may be appropriate. If continuous speed regulation is required, a variable frequency drive should be considered.

6. Can the ATS48C17Y be used with a PLC?

Yes. It can be integrated into a PLC-based motor-control system through suitable control wiring and communication arrangements. The control architecture should be designed according to the available interfaces and application requirements.

7. What control voltage does the ATS48C17Y require?

Its control supply voltage is 110–230 V AC at 50/60 Hz. Verify the control supply before installation.

8. Is the ATS48C17Y still manufactured?

No. Schneider Electric lists the ATS48C17Y as discontinued on May 2, 2023. Its published end-of-service date is December 31, 2030.

9. What is the recommended replacement for ATS48C17Y?

Schneider Electric recommends the ATS480C17Y from the Altivar Soft Starter ATS480 family. Verify the electrical ratings, wiring, control configuration, and installation requirements before replacement.

10. What should buyers check when purchasing this soft starter?

Buyers should verify the complete model number, nameplate ratings, physical condition, terminal condition, control configuration, and availability of any required accessories. For used or refurbished units, request clear photographs and suitable functional-test information.

Procurement and Maintenance Recommendations

Because the ATS48C17Y has been discontinued, procurement should begin with accurate model identification and an assessment of the installation’s actual requirements.

When purchasing this model, verify that the catalog number is ATS48C17Y rather than a related Altistart 48 version. Check the 156 A starter-current rating, supply-voltage range, control supply, and duty classification.

For used or refurbished equipment, request clear photographs of the nameplate, terminals, front panel, and enclosure. Confirm whether the unit has been tested and whether any warranty or return terms apply.

For shipping and panel-planning purposes, use the supplied dimensions of 340 × 200 × 265 mm and weight of 12.4 kg as listing information, while checking the actual unit and packaging configuration before dispatch.

During maintenance, inspect power connections, control wiring, ventilation paths, and the surrounding cabinet environment. Check for signs of overheating, contamination, loose terminals, or abnormal operating conditions.

Keep a record of motor data, starter settings, and fault history. This information can help technicians diagnose problems and simplify future replacement or migration to the ATS480C17Y.

Conclusion

The Schneider Electric ATS48C17Y Altistart 48 Soft Starter is an industrial motor-control device designed for three-phase asynchronous motors operating across a 208–690 V AC supply range. With a rated starter current of 156 A, torque-control starting, controlled stopping, and integrated thermal protection, it is suitable for demanding applications involving pumps, ventilation equipment, and industrial machinery.

As the ATS48C17Y has been discontinued, accurate model verification is important when sourcing spare parts. For modernization projects, the ATS480C17Y is Schneider Electric’s recommended replacement, although electrical compatibility, control wiring, and commissioning requirements should be reviewed before installation.