The Schneider Electric Altistart 48 Soft Starter — ATS48C25Q is an industrial‑grade electronic soft starter designed to provide smooth starting and stopping of three‑phase asynchronous (induction) motors. This soft starter reduces mechanical and electrical stress by controlling the motor’s starting current and torque, improving reliability and extending equipment life. It is suitable for heavy‑duty industrial applications, including pumps, fans, compressors, conveyors, and general machinery. The unit supports torque control and integrates protections for phase loss, thermal conditions, and motor overload.
Technical Parameters
Parameter Specification
Product Name Schneider Electric Altistart 48 Soft Starter
Model ATS48C25Q
Device Type Soft Starter for Asynchronous Motor
Series Altistart 48
Rated Operational Voltage (Ue) 230…415 V AC (‑15 % / +10 %)
Supply Frequency 50 / 60 Hz
Rated Current (Ie) 233 A
Motor Power Ratings (kW) 55 kW @ 230 V (severe); 75 kW @ 230 V (standard); 110 kW @ 400 V (severe); 132 kW @ 400 V (standard); 160 kW @ 400 V (severe, delta); 220 kW @ 400 V (standard, delta)
Utilisation Category AC‑53A
Control Type Torque control soft starting
Device Connection In motor supply line or to motor delta terminals
Protection Functions Phase failure (line), thermal protection (motor and starter)
Input Discrete Signals 5 inputs (e.g., Stop, Run, LI3, LI4)
Discrete Output Logic and relay outputs including fault and run indicators
Analog Output 0–20 mA or 4–20 mA (impedance < 500 Ω)
Communication Protocol Modbus via RS‑485
Standards Compliance EN/IEC 60947‑4‑2
Product Certifications CE, UL, CSA, CCC, NOM, GOST, DNV, SEPRO, C‑Tick, TCF
Operating Position Vertical ± 10 °
Weight ~18.2 kg
IP Rating IP20
Typical Applications Heavy‑duty industrial motors, pumps, fans, compressors, conveyors
Status Discontinued (end of service planned)