ATS48C25Q SCHNEIDER SOFT STARTER
ATS48C25Q SCHNEIDER SOFT STARTER – Heavy-Duty Industrial Soft Start & Stop Controller
The ATS48C25Q SCHNEIDER SOFT STARTER (from Schneider Electric’s Altistart 48 range) is a 6-thyristor, three-phase industrial controller engineered for smooth torque-controlled acceleration and deceleration of asynchronous motors. Rated for a nominal operating current of 233 AÂ to 250 AÂ across a 230V to 415V ACÂ main supply, this unit reduces mechanical stress and electrical line surges during motor startup.
The starter features Schneider Electric’s patented Torque Control System (TCS). Unlike standard voltage-ramp controllers, TCS manages motor torque output dynamically throughout acceleration and deceleration. This eliminates water hammer in pumping applications, prevents belt slippage on high-inertia loads, and extends the lifespan of connected mechanical drives.
As shown in the image, the unit features a industrial enclosure fitted with an integrated key-pad HMI display, heavy-duty power busbar connections (top and bottom), and a green pull-apart control terminal strip for simple field wiring.
Key Features of the ATS48C25Q SCHNEIDER SOFT STARTER
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Patented Torque Control System (TCS): Delivers continuous, linear torque ramp control during both starting and stopping phases, avoiding sudden mechanical shocks.
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Dual Line and Delta Connection Modes: Can be wired directly in the motor supply line (up to 132 kWÂ at 400V) or inside the motor delta circuit (up to 220 kWÂ at 400V).
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Comprehensive Motor & Machine Protection: Includes built-in electronic thermal overload, phase failure unbalance monitoring, underload/overload protection, and locked rotor detection.
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Integrated Modbus Communication: Features an RJ45 serial port supporting Modbus RTU protocols for direct integration into factory PLCs, SCADA, or DCS networks.
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Simplified Bypass Management: Built-in logic outputs directly control an external bypass contactor once nominal operating speed is reached, preserving energy and reducing cabinet heat load.
Common Applications and Industrial Usage
The robust current handling and precise deceleration control of the ATS48C25Q SCHNEIDER SOFT STARTER make it suitable for high-demand industrial processing equipment:
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Industrial Pumping Stations: Eliminates hydraulic pressure surges and water hammer shocks on check valves and piping during shutdown.
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Centrifugal Fans & Blowers: Provides smooth acceleration for high-inertia fans, reducing belt wear and mitigating line voltage drops on weak power grids.
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Conveyors & Material Handling: Controls start-up torque to prevent product tipping, belt snapping, and mechanical gearbox damage on heavy conveyor lines.
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Compressors & Mixers: Manages high-torque start loads without causing excessive inrush currents on supply transformers.
Technical Specifications
The core electrical, mechanical, and operational parameters for the ATS48C25Q SCHNEIDER SOFT STARTER are detailed below:
| Parameter Specification | Technical Details & Operational Values |
| Component Classification | 3-Phase Industrial Soft Starter / Controller |
| Primary Target Keyword | ATS48C25Q SCHNEIDER SOFT STARTER |
| Manufacturer / Product Line | Schneider Electric / Altistart 48 (ATS48) |
| Operating Line Voltage (U_e) | 230V to 415V ACÂ (50/60 Hz, -15%Â +10%) |
| Nominal Operating Current (I_n) | 233 AÂ (250 AÂ max continuous in supply line) |
| Motor Power Rating (Line Wiring) | 75 kWÂ at 230VÂ / 132 kWÂ at 400VÂ (Standard Duty) |
| Motor Power Rating (Delta Wiring) | 132 kWÂ at 230VÂ / 220 kWÂ at 400VÂ (Standard Duty) |
| Control Circuit Voltage (U_s) | 110V to 230V ACÂ (50/60 Hz) |
| Inputs / Outputs | 5 Discrete Inputs / 3 Relay Outputs / 1 Analog Output (4–20 mA) |
| Communication Protocol | Modbus RTU via RJ45 Connector (RS485) |
| Operating Temperature | -10°C to +40°C (Up to +60°C with derating) |
| Dimensions (H x W x D) | 380 mm x 320 mm x 265 mm |
| Net Product Weight | 18.2 kg |
Operating Guidelines and Best Practices
INSTALLATION NOTICE: Mount the soft starter in a vertical orientation (pm 10°) inside enclosure cabinets to ensure proper natural convection airflow through the heatsink.
Thermal Clearance: Maintain a minimum clearance of 100 mm above and below the unit for proper cooling fan circulation.
Bypass Integration: For high-duty continuous runs, install a secondary bypass contactor driven by the starter’s relay output (R2) to eliminate heat dissipation during steady-state motor operation.
To review official international IEC manufacturing specifications for low-voltage semiconductor motor starters and controllers, consult the official IEC 60947-4-2 AC Semiconductor Motor Controllers and Starters Standard Directory.
To evaluate real-time regional warehouse stock availability or request commercial quotes for bulk procurement needs, please connect with our sales branch via the Control Qatar Contact Page.
