Medium-voltage drive for large motor loads
The Schneider Electric ATV1200A12503333 is an Altivar 1200 series medium-voltage AC drive rated for 1045 kW motor power, designed to control both asynchronous and synchronous motors in heavy industrial applications. It accepts a supply voltage range of 2970 to 3630 V through an 18-pulse diode rectifier bridge, which reduces line harmonics compared to 6- or 12-pulse topologies — important for meeting IEEE 519 limits without external filtering in many installations.
Floor-standing enclosure with separate air flows
The drive ships in a floor-standing enclosure with separate air flows for the power section and control electronics, meaning the cooling air for the transformer and cells doesn't recirculate through the control boards — a design choice that keeps dust and heat away from sensitive components. Physical footprint depends on efficiency variant: standard efficiency measures 3560 mm wide by 1400 mm deep by 2670 mm high, while the high-efficiency version is 3860 mm wide by 1600 mm deep at the same height. Forced convection cooling moves 16500 m³/h (standard efficiency) or 19800 m³/h (high efficiency) of air — plan the room ventilation accordingly, because that much airflow needs a clear intake and exhaust path.
Overload profile and protection
The drive offers two overload profiles: standard overload handles 1.2× rated current for 60 seconds or 1.5× for 3 seconds, while the high-overload profile delivers 1.5× for 60 seconds or 1.85× for 3 seconds — pick the profile that matches your load's duty cycle, not just the nameplate rating. Ground fault protection is built into the drive itself, and dielectric strength between earth and power terminals is tested at 10 kV AC — a serious margin for medium-voltage service.
Internal architecture and I/O
The drive consists of a phase-shifting transformer feeding 9 power cells, with medium-voltage arrestors, cooling fans, and a human-machine interface — plus two plinths for cable entry and mounting. Control connections include 4 software-configurable analogue inputs (0-20 mA / 4-20 mA, 250 Ohm impedance), 1 analogue output of the same type, and 6 discrete inputs (expandable to 10). An integrated EMC filter is standard, and electrical isolation between power and control circuits means the 24 V control loop stays referenced to ground, not floating on the medium-voltage bus — a detail that simplifies troubleshooting when you're tracing a ground fault.