Medium voltage drive for 3-4 MW motor loads
The Schneider Electric ATV1200A46805555 is an Altivar 1200 medium voltage variable speed drive rated for 3912 kW motor power, designed to control asynchronous and synchronous motors in the 3-4 MW class. It accepts a supply voltage of 2970-3630 V through a 30-pulse diode rectifier bridge, which delivers near-sinusoidal input current with low harmonic distortion — no external harmonic filter needed for most grid codes. The drive is built as a floor-standing enclosure with separate airflows for power and control sections, keeping the electronics compartment isolated from the heat and dust of the power stage.
Overload capability and motor duty profiles
Two overload profiles are available: standard overload handles 1.2× In for 60 seconds and 1.5× In for 3 seconds; high overload handles 1.5× In for 60 seconds and 1.85× In for 3 seconds. The speed control range is 20-100%, suitable for variable-torque loads like pumps and fans as well as constant-torque conveyors and extruders within that band. Line current draw is 490 A at rated load, with an apparent power of 4680 kVA — the transformer and upstream switchgear must be sized for this full-load kVA, not just the motor kW.
Physical footprint and site integration
The enclosure measures 1700-1800 mm deep, 6070-6370 mm wide, and 2820-3040 mm tall depending on efficiency variant — a substantial footprint that requires a dedicated electrical room with reinforced flooring. Cooling requires 70,000 m³/h of forced air, with the fan powered from a separate 380 V AC supply — the room HVAC must handle this airflow without recirculating hot exhaust. Operating noise is 80 dB, typical for a drive of this power class with forced convection cooling; ear protection zones around the enclosure are expected.
System composition and internal architecture
Electrical isolation between power and control circuits is maintained, with a dielectric strength of 20 kV AC between earth and power terminals. The input connection uses M10 bar-type terminals accepting up to 6×40 mm² conductors per phase, with entry from the top or bottom of the cabinet.
Standards compliance and protection features
The ATV1200A46805555 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 — covering EMC, safety, and enclosure protection for industrial drive installations. Pollution degree 2 per EN/IEC 61800-5-1 means it is rated for normally non-conductive environments where occasional condensation may occur — typical for indoor electrical rooms. Built-in ground fault protection covers the drive output, and the prospective line short-circuit current withstand is 31.5 kA for 150 ms, allowing coordination with upstream MV switchgear. Current lifecycle status is current production — this is an active catalog item from Schneider Electric, not a discontinued or NRND line.