Medium-voltage drive for 3.3 kV motors — 24-pulse rectifier, 3344 kW
The ATV1200A40004242 is a Schneider Electric Altivar 1200 medium-voltage variable speed drive rated for 3344 kW motor power at a supply voltage of 2970...3630 V AC. Its 24-pulse diode rectifier bridge input topology draws line current of 550 A and presents an apparent power of 4000 kVA, with a prospective line short-circuit current withstand of 31.5 kA for 150 ms. This drive is designed for asynchronous and synchronous motors in applications requiring a speed range of 20...100%.
Physical footprint and installation constraints
The drive is assembled in a floor-standing enclosure with separate air flows for power and control sections. External dimensions are 1800 mm depth, 6670 mm width, and 2740 mm height at standard efficiency. Forced convection cooling moves 70000 m³/h of air. The operating position is vertical within ±10 degrees. Operating altitude is 1000...2000 m with a current derating of 0.6% per 100 m above 1000 m. Electrical connection uses M10 screw-type bars with clamping capacity for 6 x 40 mm² cables on the line side (/R, L2/S, L3/T), entry from bottom or top.
Overload capability and protection envelope
Standard overload profile: 1.2 × In for 60 seconds, 1.5 × In for 3 seconds. High overload profile: 1.5 × In for 60 seconds, 1.85 × In for 3 seconds. Ground fault protection is integrated at the drive level. Dielectric strength between earth and power terminals is 20 kV AC. Pollution degree 2 per EN/IEC 61800-5-1, overvoltage category II. The drive includes an integrated EMC filter and meets EN/IEC 61800-3, EN/IEC 61800-4, and EN/IEC 61800-5-1. CE marked.
Control interface and I/O complement
Four software-configurable analogue inputs accept 0...20 mA or 4...20 mA, 24 V max, 250 Ω impedance. One analogue output is similarly configurable for 0...20 mA or 4...20 mA DC, 250 Ω impedance. Six discrete inputs are standard, expandable to ten. Electrical isolation is maintained between power and control circuits. The product composition includes two plinths, a phase-shifting transformer, medium-voltage arrestors, cooling fans, a human-machine interface, and twelve power cells.