Medium voltage drive for large asynchronous and synchronous motors
The Schneider Electric ATV1200A41005555 is an Altivar 1200 medium voltage variable speed drive rated for 3428 kW motor power, operating from a 2970-3630 V supply. The 30-pulse diode rectifier bridge input delivers low harmonic distortion without external filtering — a key advantage for installations with strict power quality requirements. This drive is designed for both asynchronous and synchronous motors, making it suitable for high-power applications like large pumps, compressors, fans, and conveyors in industries such as mining, oil and gas, water treatment, and cement.
Overload capability and fault withstand
The overload profile is defined for two duty classes: standard overload handles 1.2 In for 60 s and 1.5 In for 3 s; high overload handles 1.5 In for 60 s and 1.85 In for 3 s. This allows the drive to handle process upsets and starting surges without nuisance tripping. Fault protection includes ground fault protection integral to the drive, and the input can withstand a prospective line short-circuit current of 31.5 kA for 150 ms — critical for coordinating with upstream protection devices.
Physical construction and environmental limits
The drive ships in a floor-standing enclosure with separate air flows for power and control sections. Dimensions vary by efficiency class: standard efficiency measures 2740 mm high × 6070 mm wide × 1700 mm deep; high efficiency adds height to 3040 mm and width to 6370 mm, with depth at 1800 mm. Cooling is forced convection requiring 46,500 m³/h of air volume. The operating altitude range extends to 2000 m with current derating of 0.6% per 100 m above 1000 m. Operating position is vertical within ±10 degrees. Pollution degree 2 per EN/IEC 61800-5-1, overvoltage category II, and dielectric strength of 20 kV AC between earth and power terminals define the insulation coordination for this class of medium voltage equipment.
Standards compliance and lifecycle status
The drive 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. An integrated EMC filter is included, and electrical isolation exists between power and control circuits.
Control interface and I/O complement
The control section requires an external supply at 220 V AC, 3 kVA, with an optional 220 V AC/DC supply. The cooling fan runs on a separate 380 V AC supply. Four software-configurable analogue inputs (0-20 mA / 4-20 mA, 24 V max, 250 Ohm impedance) and one analogue output (same current range) handle process feedback. Discrete I/O includes 6 digital inputs standard, expandable to 10 optional. The speed range is 20-100%, and the output voltage is limited to the supply voltage level.