Schneider Electric ATS490C79Y Altivar ATS490 790A 208-690V AC 400 kW Soft Starter

The Schneider Electric ATS490C79Y is a three-phase Altivar Soft Starter from the ATS490 range, rated 790 A continuous (normal duty) on a 208-690 V AC supply. It starts and stops asynchronous motors up to 400 kW at 400 V (355 kW in heavy duty), with Safe Torque Off (SIL 1 / PL c) built into the drive logic. A native Modbus TCP/EtherNet/IP port and 300 VA control supply support supervised motor control from the same enclosure.

Technical Specifications

Certifications & Standards

• CE
• cULus
• UKCA
• CCC
• EN/IEC 60947-4-2

Selection Notes

At 790 A normal duty, the ATS490C79Y covers motors up to 400 kW at 400 V; size on the heavy-duty rating (660 A) instead when the load cycles frequently or starts against high inertia, since the 400% Ie / 13 s overload window is the same but the continuous current is lower. Variable or quadratic-torque loads such as pumps, fans, compressors and conveyors fit the normal-duty figure; cyclic loads like crushers and grinders should be sized on the heavy-duty current instead. Motors above 400 kW at 400 V call for the next current frame up in the ATS490 range; motors below it can drop to the next frame down to avoid oversizing the starter.