The Schneider Electric ATS48C59Q Altistart 48 Soft Starter is a high-performance motor starting solution engineered for demanding industrial automation applications requiring smooth, controlled acceleration of large three-phase AC induction motors. Manufactured by Schneider Electric (with Telemecanique and Westcode heritage, an IXYS Company), this powerful soft starter handles motors up to 590 amps at 230V-415V three-phase, 50/60Hz. In applications where direct-on-line starting creates unacceptable mechanical stress, voltage dips, or current surges, the Altistart 48 provides the controlled torque ramp that protects both the motor and the driven mechanical equipment.

Large motor starting represents one of the most challenging operational scenarios in industrial power distribution. A direct-on-line start can draw 6-8 times the motor's full-load current, causing voltage depression that affects other equipment on the same electrical bus and imposes severe mechanical stress on motor windings, couplings, gearboxes, and driven machinery. The ATS48C59Q addresses these challenges through advanced torque control algorithms that limit starting current to a programmed level while providing the accelerating torque required for reliable starts under varying load conditions. The AC53A: 3-23: 50-10 classification per IEC 60947-4-2 confirms the starter's capability for demanding cyclic duty applications.

Key Features & Specifications

The Schneider Electric ATS48C59Q Altistart 48 incorporates advanced motor control technology from one of the world's leading automation companies. Every feature is designed to maximize motor and mechanical equipment life while minimizing the electrical disturbances associated with large motor starting.

• Rated Current (Ici): 590A for large industrial motor applications
• Voltage Range: 230V-415V three-phase, 50/60Hz
• Utilization Category: AC53A: 3-23: 50-10 per IEC 60947-4-2
• Torque Capacity: 500 Lb-in / 57 N.M rated torque control
• Standards Compliance: IEC 60947-4-2 for contactors and motor starters
• Torque Control: Advanced algorithm for smooth, controlled acceleration
• Protection Functions: Motor thermal overload, phase loss, stall detection
• Manufacturer Heritage: Schneider Electric / Telemecanique / Westcode (IXYS)
• Certifications: A039565, E184727
• Weight: 47.500 kg, industrial-grade construction

Technical Specifications

Specification	Details
Product Model	ATS48C59Q
Product Series	Altistart 48 Soft Starter
Manufacturer	Schneider Electric / Telemecanique / Westcode
Rated Current (Ici)	590 Amps
Supply Voltage	230V-415V AC, 3-Phase
Supply Frequency	50/60 Hz
Utilization Category	AC53A: 3-23: 50-10
Standards	IEC 60947-4-2
Torque Rating	500 Lb-in / 57 N.M
Certification Numbers	A039565, E184727
Weight	47.500 kg

Applications & Use Cases

The Schneider Electric ATS48C59Q Altistart 48 soft starter is deployed across a wide range of industrial automation applications where controlled motor starting is essential for equipment protection and power quality management. The 590-amp rating makes this starter suitable for some of the largest motors found in commercial and industrial facilities, including large HVAC supply and return fans, primary chilled water pumps, cooling tower fans, and large compressor loads in process refrigeration and air compression systems.

In marine technology applications, the ATS48C59Q controls large seawater cooling pumps, ballast pumps, ventilation fans, and cargo handling equipment on commercial vessels and offshore installations. The controlled torque ramp is particularly valuable for belt-driven equipment, gearbox-coupled machinery, and high-inertia loads where sudden torque application during DOL starting can cause mechanical damage. The starter's IEC 60947-4-2 compliance and comprehensive protection functions ensure reliable operation in the challenging environments characteristic of marine and industrial installations worldwide.

Why Choose the Schneider Electric ATS48C59Q

Schneider Electric's Altistart 48 series represents decades of refinement in soft starter technology, combining the expertise of Telemecanique and Westcode with Schneider Electric's global manufacturing and support capabilities. The ATS48C59Q's torque control algorithm provides superior starting performance compared to basic voltage-ramp soft starters, automatically adjusting the voltage applied to the motor to achieve the programmed torque profile regardless of load variations.

The AC53A utilization category rating confirms that this starter is designed for severe-duty applications with frequent starting cycles, making it suitable for crushers, mills, compressors, and conveyor systems where repeated starts are part of normal operation. The comprehensive protection suite monitors motor thermal state, detects phase loss and phase imbalance, identifies stall conditions, and provides underload protection for pump applications. When you source this soft starter from Auto2mation, you receive the benefit of our 30-day warranty, free shipping, and the support of a team with deep expertise in industrial automation and marine technology equipment.

Compatibility & Integration

The Schneider Electric ATS48C59Q is designed for straightforward integration into standard industrial motor control centers and switchgear assemblies. The starter connects in series with the motor supply circuit (typically on the line side of the contactor or circuit breaker) and is bypassed by a contactor once the motor reaches full speed, reducing heat generation during continuous operation. The starter's control terminals accept standard 24V DC or 110-230V AC control signals, enabling compatibility with existing control system voltages.

Integration into automation systems is facilitated through the starter's built-in Modbus communication and optional communication modules for Profibus DP, DeviceNet, and Ethernet protocols. The Altistart 48 can be configured for cascade starting of multiple motors, pump control macros with sleep mode for energy savings, and braking control for rapid deceleration of high-inertia loads. Auto2mation's technical team can provide guidance on parameter configuration, wiring practices, and integration with your specific control system architecture.

Maintenance & Support

The ATS48C59Q soft starter is designed for long service life with minimal maintenance requirements. The power semiconductors (thyristors/SCRs) are solid-state devices with no moving parts and indefinite life under normal operating conditions. The bypass contactor, when used, represents the primary wear item and should be inspected at intervals based on operational cycle count. The starter's built-in thermal monitoring and self-diagnostic functions provide advance warning of abnormal conditions, enabling predictive maintenance scheduling.

Auto2mation provides comprehensive post-sale support for all soft starters we supply. Our team includes professionals experienced in motor control applications, industrial automation, and marine electrical systems. We can assist with application sizing, parameter configuration guidance, and troubleshooting support. Our 30-day warranty on used equipment and free shipping policy demonstrate our commitment to delivering value and confidence to our customers worldwide.

Frequently Asked Questions

Q1: What size motor can the ATS48C59Q soft start?

The ATS48C59Q is rated for 590 amps, suitable for three-phase motors up to approximately 315-355 kW (425-475 HP) at 400V depending on application duty. The exact motor size depends on the motor's full-load current and the application's starting requirements (load torque, starting frequency, and acceleration time).

Q2: What is the difference between a soft starter and a VFD?

A soft starter controls motor voltage during starting and stopping only, providing reduced-voltage starting and soft stopping. It does not vary motor speed during normal operation. A VFD (Variable Frequency Drive) varies both voltage and frequency to control motor speed continuously. Soft starters are typically more cost-effective for applications that only require controlled starting.

Q3: Can this soft starter be used for marine applications?

Yes, the ATS48C59Q is suitable for marine motor control applications including pumps, fans, and compressors. The IEC 60947-4-2 certification and robust design suit marine electrical environments. Proper installation following marine electrical codes and adequate ventilation for the starter's heat dissipation are essential.

Q4: What protection functions are built into the Altistart 48?

The Altistart 48 includes motor thermal overload protection, phase loss detection, phase imbalance monitoring, stall protection, underload protection, and thyristor overload protection. These functions protect both the motor and the soft starter from damage due to abnormal operating conditions.

Q5: What is the warranty and shipping policy from Auto2mation?

Auto2mation provides a 30-day warranty on all used products covering defects in materials and workmanship. All orders include free worldwide shipping with secure industrial packaging to ensure your product arrives in optimal condition.

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