75 kW Altivar 21 for pump and fan duty
The ATV21HD75N4 is a 75 kW Altivar 21 AC drive designed for variable-torque loads — pumps, fans, compressors — where the adjustable PI regulator and transient overtorque of 120 % for 60 s handle starting inertia and duct pressure spikes without oversizing the drive. Input voltage range is 380…480 V three-phase, with line current of 111.3 A at 480 V and 141.8 A at 380 V; apparent power at 380 V is 105.3 kVA. The switching frequency is adjustable from 6 to 16 kHz, with derating required above 8 kHz.
Standards and integration fit
Compliant with IEC 61800-5-1 for safety and IEC 61800-3 for EMC, with an integrated Class A EMC filter. The drive carries CE marking and meets multiple environment/category combinations (C1, C2, C3) per EN 61800-3, covering both first and second environments. Physical dimensions are 24.8 in (630 mm) high, 12.6 in (320 mm) wide, and 11.4 in (290 mm) deep — allow clearance for the heatsink and vertical mounting within ±10°. The RS-485 port uses 2-wire Modbus RTU at 9600 or 19200 bps, addressing up to 247 nodes. Optional communication cards add BACnet, LonWorks, Metasys N2, or APOGEE FLN for building management system integration.
