Medium-voltage drive architecture for large asynchronous motors
The ATV1200A4706666 is a Schneider Electric Altivar 1200 medium-voltage variable speed drive rated for 393 kW motor power and 470 kVA apparent power, designed to control large asynchronous motors in heavy industrial applications. It accepts a 2970-3630 V supply via a 36-pulse diode rectifier bridge, which significantly reduces line-side harmonics compared to 6- or 12-pulse topologies — a key advantage when feeding from a weak grid or when harmonic compliance is a project requirement.
Physical footprint and enclosure integration
The drive ships in a floor-standing enclosure with separate air flows for the power section and control electronics. Standard-efficiency dimensions are 1400 mm deep, 3060 mm wide, and 2520 mm high; the high-efficiency variant is 1500 mm deep, 3360 mm wide, and 2670 mm high. Forced-convection cooling moves 13200 m³/h (standard) or 16500 m³/h (high efficiency) of air, so the installation site must provide adequate clearance for intake and exhaust — the noise level at full fan speed is 80 dB.
Overload capability and fault withstand
Standard overload rating: 1.2 × In for 60 s and 1.5 × In for 3 s. High overload rating: 1.5 × In for 60 s and 1.85 × In for 3 s. This means the drive can ride through short-duration load spikes without tripping — useful for crushers, mills, or conveyors with breakaway torque demands. The input stage is rated for a prospective short-circuit current of 31.5 kA for 150 ms, and the drive includes integrated ground fault protection. Dielectric strength between earth and power terminals is 20 kV AC.
Control I/O and auxiliary supply
The drive provides 4 software-configurable analogue inputs (0-20 mA / 4-20 mA, 250 Ohm impedance, 24 V max) and 1 analogue output of the same type. Discrete inputs are 6 standard, expandable to 10 with an option. Control electronics require an external 220 V AC supply at 3 kVA; the cooling fans run from a separate 380 V AC supply. An optional external 220 V AC/DC control supply is available.
Standards compliance and environmental limits
The ATV1200A4706666 is CE marked and complies with EN/IEC 60204-11, EN/IEC 60529, EN/IEC 61800-3, EN/IEC 61800-4, and EN/IEC 61800-5-1. Operating altitude is 1000-2000 m with a 0.6 % current derating per 100 m above 1000 m. Relative humidity range is 0-90 % (0-95 % optional). The drive must be mounted vertically within ±10°.