37 kW, 52 kVA — what the ratings mean for a 480 V line
The ATV212HD37N4 is a 37 kW Altivar 212 variable speed drive rated for 3-phase 480 V input, drawing 54.4 A line current at 480 V and 68.9 A at 380 V. The 52 kVA apparent power at 380 V sets the transformer sizing floor for the installation. The integrated Class C2 EMC filter means this drive meets conducted emission limits for industrial environments without an external filter — a common requirement for CE-marked panels. The drive carries CE marking and complies with IEC 61800-3 across multiple environment categories (C1, C2, C3) and UL Type 1 enclosure rating.
Protection coverage and fieldbus interface
The drive monitors for overheating, short-circuit between motor phases, earth faults, DC bus overvoltage, input phase loss, and motor thermal overload via PTC probes. The adjustable PI regulator supports closed-loop process control for pump or fan applications. Communication is via 2-wire RS-485 with Modbus RTU protocol at 9600 or 19200 bps, plus an optional LonWorks communication card. The RJ45 connector and open-style terminal block give flexibility for panel wiring.
