55 kW normal duty, 45 kW heavy duty – which rating fits your load
The ATH630D55N4Z is a standard-version Altivar HVAC ATH600 drive rated 55 kW (75 hp) for normal-duty fan/pump loads and 45 kW (60 hp) for heavy-duty constant-torque loads like conveyors or compressors. The line current at 380 V normal duty is 97.2 A; at 480 V heavy duty it drops to 71.8 A. That spread means you size the input protection and cabling for the higher normal-duty figure unless the application is exclusively heavy-duty.
Safety function and compliance package
Safe Torque Off (STO) is integrated to SIL 3 per IEC 61508 and PL e per ISO 13849-1 – no external safety relay needed for the stop function. The drive carries CE, UKCA, CULus, EAC, RCM, and ATEX markings, plus RoHS and WEEE. The integrated Class C3 EMC filter covers conducted emissions for industrial environments (second environment per EN/IEC 61800-3).
Application-specific functions built in
Fire mode, forced fire mode, run permissive, PID controller with three additional PID sets, damper control, underload detection for broken belt, scroll compressor management, skipped frequencies, catch on the fly, and power monitoring are all standard. The drive also supports cybersecure firmware update. These are not option cards – they are in the base firmware.
