Medium-voltage drive for large asynchronous motor loads
The ATV1200A44401010 is a Schneider Electric Altivar 1200 medium-voltage variable speed drive, rated for 3712 kW motor power with 4440 kVA apparent power at the input. This places it squarely in the heavy industrial segment — think mainline conveyor drives in mining, large centrifugal pumps in water transmission, or ID/FD fans in power generation. It accepts a supply voltage of 2970 to 3630 V AC and draws 280 A line current. The input stage uses a 48-pulse diode rectifier bridge, which inherently cancels lower-order harmonics without requiring an external harmonic filter — a major advantage when the facility's power quality limits are tight.
Ratings that drive the installation decision
The 48-pulse rectifier topology means the drive meets IEEE 519 harmonic limits at the point of common coupling for most installations without added line reactors or active filters. The 31.5 kA prospective short-circuit current rating for 150 ms tells the protection engineer what upstream breaker and cable ratings are needed. Overload capability is specified in two profiles: standard overload handles 1.2× rated current for 60 seconds and 1.5× for 3 seconds; high overload handles 1.5× for 60 seconds and 1.85× for 3 seconds. The high overload profile is the one to use for applications like crushers or extruders that need sustained torque beyond the motor's rated current. Dielectric strength is 28 kV AC between earth and power terminals — this is the insulation coordination figure that governs the clearance and creepage distances inside the cabinet, and it confirms the drive is designed for ungrounded or high-resistance-grounded medium-voltage systems. Operating altitude above 1000 m requires derating the output current by 0.6% per 100 m. At 2000 m that's a 6% reduction — factor this into the motor sizing if the drive sits at elevation.
Physical footprint and enclosure integration
This drive ships as a floor-standing enclosure measuring 1600 mm deep, 7170 mm wide, and 3040 mm high — it occupies roughly 11.5 m² of floor space. The enclosure has separate air flows for the power cells and the phase-shifting transformer, so the ventilation ducting in the substation must keep these airstreams segregated to avoid recirculating hot air. The product composition includes 24 power cells, a phase-shifting transformer, medium-voltage arrestors, cooling fans, a human-machine interface, and two plinths. The 48-pulse rectifier is achieved by the transformer's phase-shifting windings feeding the 24 cells — each cell sees a fraction of the total voltage, which also limits fault energy. Cooling is forced convection moving 70000 m³/h of air — that's substantial airflow requiring louvered intake and exhaust openings in the room, not just a few wall grilles. The noise level is 80 dB, so ear protection zones around the drive are expected.
Standards compliance and documentation
The drive carries CE marking and complies with EN/IEC 60204-11 (electrical equipment of machines), EN/IEC 60529 (ingress protection), EN/IEC 61800-3 (EMC for adjustable-speed drives), EN/IEC 61800-4 (voltage-source drives), and EN/IEC 61800-5-1 (electrical, thermal, and energy safety). The integrated EMC filter covers conducted emissions per the second-environment (industrial) limits of EN/IEC 61800-3. For first-environment (residential) compliance, an external filter would be needed, but that is rarely a concern for a 3.7 MW drive.
Sourcing and lifecycle position
For a project at this power level, the procurement lead time is driven by the transformer winding schedule and the power cell assembly cycle. No direct pin-compatible substitute exists in the Altivar 1200 family — the order code encodes the specific power rating, voltage class, and enclosure configuration.