The ATV630U55N4Z is a 5.5 kW normal-duty variable speed drive from the Altivar Process ATV600 range, rated for 380...480 V supply and delivering 12.7 A continuous output at 4 kHz in normal duty. It supports both asynchronous and synchronous motors, making it a fit for pump, fan, and compressor applications in process and utilities settings.
The headline motor power ratings — 5.5 kW normal duty, 4 kW heavy duty — tell you the drive is sized for a 5.5 kW motor running a centrifugal load (quadratic torque) or a 4 kW motor under constant-torque applications like conveyors. The heavy-duty current of 9.3 A at 4 kHz is the figure to check for a constant-torque BOM line; the normal-duty 12.7 A is for variable-torque loads. Line current at 380 V normal duty is 10.4 A, and at 480 V normal duty it's 9.1 A. For heavy duty, those drop to 8 A and 7.2 A respectively. The THDI is under 48% at full load per IEC 61000-3-12, which matters if the facility has sensitive equipment on the same transformer. The integrated EMC filter covers 10 m cable for category C2 and 50 m for category C3 with the EMC plate option. That saves an external filter in most panel builds, but for the first 10 m of motor cable the drive already meets the stricter C2 conducted emission limits.
Communication and I/O flexibility
Slot A accepts a range of communication modules — Profibus DP V1, PROFINET, DeviceNet, Modbus TCP/EtherNet/IP, CANopen (daisy chain RJ45, SUB-D 9, or screw terminals), Ethernet Powerlink, and BACnet MS/TP. The drive also has native Modbus serial and Modbus TCP Ethernet ports. Slot A and slot B can host digital/analog I/O extension or output relay extension modules. Eight discrete inputs are standard, with DI7 and DI8 programmable as pulse inputs up to 30 kHz. That covers flowmeter or encoder feedback without an add-on card. The adjustable PID regulator is built in, so closed-loop control for pressure or level is available without an external controller.
Safety and environmental ratings
Operating altitude is 1000...4800 m with 1% current derating per 100 m above 1000 m. For a panel at 2000 m, expect roughly 10% derating from the 12.7 A nominal. Vibration resistance is 1.5 mm peak-to-peak from 2-13 Hz and 1 gn from 13-200 Hz; shock resistance is 15 gn for 11 ms.
Mounting and cooling
Cabinet mount with a heat sink and forced convection cooling. The cooling air volume is 38 m³/h (10038.7 Gal/hr US). Operating position is vertical ±10 degrees. IP20 protection means it's intended for a clean, dry enclosure — not for washdown or dust-laden environments.