75 kW normal duty, 55 kW heavy duty — the rating that decides the motor
The ATV930D75N4C is a 380-480 V 3-phase variable speed drive from the Altivar Process ATV900 series, rated 75 kW normal duty and 55 kW heavy duty at 145 A continuous output current (2.5 kHz switching frequency). The heavy duty figure governs constant-torque loads — conveyors, extruders, positive-displacement pumps — where the motor pulls rated torque across the speed range. Normal duty applies to variable-torque loads like centrifugal pumps and fans where torque falls with speed.
IP21 enclosure, wall-mount — clean indoor installation only
IP21 / UL Type 1 protection means the drive is suitable for indoor, non-condensing environments where tools are required for access. No washdown rating — keep it out of wet or dusty areas. Wall-mount only, vertical within ±10°, with 295 m³/h of cooling air volume required. The control terminals accept 0.5-1.5 mm² (AWG 20-16); the DC bus and line/motor terminals take 95-120 mm² (AWG 3/0-250 kcmil). Operating altitude derating starts at 1000 m: 1 % current derating per 100 m above that. Pollution degree 2, overvoltage category III. Vibration resistance is 1.5 mm peak-to-peak at 2-13 Hz and 1 gn at 13-200 Hz per IEC 60068-2-6; shock resistance is 15 gn for 11 ms per IEC 60068-2-27.
Built-in Ethernet, fieldbus slots, and functional safety
The drive ships with Modbus TCP, EtherNet/IP, and Modbus serial as standard communication ports. Three option slots (A, B, C) accept fieldbus modules for Profibus DP V1, PROFINET, DeviceNet, EtherCAT, CANopen, or Ethernet Powerlink, plus I/O extension and encoder interface modules. The integrated EMC filter meets IEC 61800-3 with an optional EMC plate for higher performance. Standards compliance includes UL 508C, IEC 61800-3 (EMC), IEC 61800-5-1 (safety), IEC 61508, and IEC 13849-1 — the drive supports functional safety integration including STO (Safe Torque Off) via the 24 V DC internal supply. The adjustable PID regulator handles closed-loop process control without an external controller.
