ATS48C79Q Soft starter ATS48 790A 400B

Schneider Electric ATS48 Soft Starters — The Legendary Heavy-Duty Industrial Range

The Schneider Electric Altistart 48 (ATS48) soft starter series is a true global legend in heavy industrial automation, designed to handle extreme starting profiles for electric motors from 7.5 to 630 kW. The core of the ATS48 is its patented TCS (Torque Control System) algorithm, which maintains a completely linear acceleration profile regardless of shaft mechanical torque fluctuations. This provides high-end, fully symmetrical three-phase control capable of sustaining heavy thermal loads.

Typical Applications for Schneider ATS48

• Heavy-Duty Mills and Stone Crushers: Symmetrical three-phase thyristors easily handle starting currents of up to 500% of nominal rating for 30 seconds.
• High-Inertia Ventilation Impellers: Delivers smooth, controlled starting ramps for massive exhaust fans without generating excessive winding heat.
• High-Pressure Municipal Water Pumps: Active TCS torque control manages fluid deceleration profiles, protecting pipes from checking pressure waves.

What Differentiates Schneider ATS48 from Competitors

A primary structural design element of the ATS48 is its large, heavy-duty external heatsink. By omitting a built-in bypass contactor, the chassis serves as a massive thermal radiator for demanding cycles.

When Schneider ATS48 is NOT Suitable

• For basic starting tasks where panel space constraints require an integrated, compact bypass design — select Schneider ATS22.
• For B2B facilities modernizing process layouts and demanding native cyber-secured IoT connectivity — upgrade to the next-gen Schneider ATS480.

Our System Assembly Recommendations

The Altistart 48 is exceptionally robust and durable. Many B2B systems we have deployed have operated in mining and wood-processing environments for over a decade. When designing panel schematics, always specify an external bypass contactor wired in parallel. This unloads the thyristors during run state, saving energy and eliminating cabinet thermal buildup.