3143 kW motor power — what that means for a medium-voltage drive installation
The ATV1200A42406363 is an Altivar 1200 medium-voltage AC drive rated for 3143 kW motor power with 3760 kVA apparent power at the input. This is not a panel-mount VFD you bolt to a wall — it ships as a floor-standing enclosure with separate air flows, measuring 6670 mm wide by 2670 mm (standard efficiency) or 2970 mm (high efficiency) tall, 1700 mm deep. The 36-pulse diode rectifier bridge draws 410 A line current from a 2970…3630 V supply, which means the upstream transformer and switchgear must be sized for that voltage class and fault duty — the prospective line Isc is 31.5 kA for 150 ms.
Overload profiles and protection coordination
The overload withstand capability is defined for two duty classes: standard overload allows 1.2× In for 60 s and 1.5× In for 3 s; high overload allows 1.5× In for 60 s and 1.85× In for 3 s. This directly governs the motor protection settings — if the driven load is a high-inertia fan or centrifuge, the high-overload profile gives you the headroom to accelerate through the breakaway torque without tripping on overcurrent. Ground fault protection is integral to the drive, so an external ground-fault relay on the output is redundant unless the installation standard specifically requires it.
System composition and cooling infrastructure
The drive comprises 2 plinths, a phase-shifting transformer, medium voltage arrestors, cooling fans, an HMI, and 18 power cells. Forced convection cooling moves 33000 m³/h of air — that volume must be accounted for in the room HVAC design; the noise level at full fan speed is 80 dB, so hearing protection zones around the drive are expected. The control supply is 220 V AC at 3 kVA, with an optional external supply for the cooling fan at 380 V AC. Dielectric strength between earth and power terminals is 20 kV AC, confirming the insulation coordination for a 3.3 kV class system.
Standards compliance and lifecycle status
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. The lifecycle stage is listed as current — meaning the manufacturer continues to support this order code for new installations.