Medium-voltage drive for 3 MW motor loads
The Schneider Electric ATV1200A37803333 is an Altivar 1200 series medium-voltage AC drive rated for 3160 kW motor power with a supply voltage range of 2970 to 3630 V. This is a floor-standing cabinet assembly measuring 5870 mm wide by 2740 mm tall by 1700 mm deep — it occupies a dedicated substation room, not a panel. The 18-pulse diode rectifier bridge input topology inherently mitigates line harmonics, reducing the need for external filters. The drive handles both asynchronous and synchronous motors, with a speed range of 20 to 100% and 720 A line current at full load. Apparent power rating is 3780 kVA.
Overload profiles and duty cycle planning
Four distinct overload profiles are available: 1.2× rated current for 60 seconds (standard), 1.5× for 3 seconds (standard), 1.5× for 60 seconds (high overload), and 1.85× for 3 seconds (high overload). Match the profile to your application's peak torque demand — a crusher or centrifuge start may need the high-overload 60-second window. The prospective line short-circuit current rating is 31.5 kA for 150 ms, which sets the upstream protection coordination requirement. Ground fault protection is integrated into the drive. Dielectric strength between earth and power terminals is 10 kV AC, with electrical isolation between power and control circuits.
System architecture and cooling demands
The drive comprises 2 plinths, a phase-shifting transformer, 9 power cells, medium-voltage arrestors, cooling fans, and a human-machine interface. Forced convection cooling moves 60000 m³/h of air — the installation room must have corresponding ventilation or ducting. Noise level is 80 dB, so ear protection zones and acoustic treatment may be needed near the drive. Operating altitude is limited to 1000 m with derating of 0.6% per 100 m up to 2000 m. The control section requires an external 220 V AC supply at 3 kVA; the cooling fan runs on 380 V AC. An optional external supply for control at 220 V AC/DC is available, as is an optional external fan supply at 380 V AC.
Control interface and field wiring
The drive provides 4 software-configurable analogue inputs (0-20 mA / 4-20 mA, 24 V max, 250 Ohm impedance), 1 analogue output (same current ranges), and 6 discrete inputs expandable to 10. The I/O is suitable for basic speed reference, feedback, and start/stop commands. Power connection uses bar-type M10 screw terminals accepting 6 x 40 mm² cable per phase, with entry from the bottom or top. Output voltage is at or below the supply voltage. An integrated EMC filter is standard. Compliance standards include EN/IEC 61800-3 (EMC), EN/IEC 61800-4, EN/IEC 61800-5-1, EN/IEC 60204-11, and EN/IEC 60529. CE marking is applied.
Environmental limits for installation planning
Relative humidity range is 0 to 90% non-condensing, optionally 0 to 95%. Operating position must be vertical within ±10 degrees. Vibration resistance is 4.9 m/s² over 10 to 50 Hz. The enclosure colour is grey (RAL 7032). Assembly style is floor-standing with separate air flows for power and control sections.