What this 903 kW drive delivers in a medium-voltage line
The ATV1200A10804242 is a medium-voltage AC drive from the Altivar 1200 range, rated for 903 kW motor power and 1080 kVA apparent power, with a supply voltage window of 2970 to 3630 V. It uses a 24-pulse diode rectifier bridge on the input, which significantly reduces line-side harmonics compared to a 6- or 12-pulse design — relevant for installations where IEEE 519 compliance is a concern. The drive is assembled in a floor-standing enclosure with separate air flows for power and control sections, keeping heat away from sensitive electronics.
Overload capability and duty cycle
Standard overload rating: 1.2 × In for 60 seconds and 1.5 × In for 3 seconds. High overload rating: 1.5 × In for 60 seconds and 1.85 × In for 3 seconds. This means the drive can handle short-duration peak loads — a 1.85× overload for 3 seconds is useful for starting high-inertia loads like large fans or centrifuges without oversizing the drive.
Physical footprint and cooling demands
Dimensions vary by efficiency variant: standard efficiency is 2670 mm high, 3660 mm wide, and 1600 mm deep; high efficiency adds height to 2820 mm and width to 3960 mm, with depth at 1400 mm. Cooling air volume is substantial — 29,900 m³/h for standard efficiency, 33,200 m³/h for high efficiency — so the installation room must have adequate ventilation or ducting to handle the heat rejection. Forced convection cooling is standard; the internal fan supply is 380 V AC, with an optional external supply for the fan.
Standards, isolation, and environmental limits
The drive carries CE marking and complies with EN/IEC 60204-11, EN/IEC 60529, EN/IEC 61800-3, EN/IEC 61800-4, and EN/IEC 61800-5-1. Electrical isolation between power and control is standard. Pollution degree 2 per EN/IEC 61800-5-1, overvoltage category II. Dielectric strength tested at 20 kV AC between earth and power terminals. Operating altitude up to 1000 m without derating; above that, derate current by 0.6% per additional 100 m. Vibration resistance is 4.9 m/s² from 10 to 50 Hz.