Power stage and input architecture
The ATV1200A68606060: Rated at 6860 kVA apparent power and 5735 kW motor power, this drive is sized for large synchronous or asynchronous motor loads in the multi-megawatt range. The 30-pulse diode rectifier bridge input delivers near-sinusoidal line current draw, reducing harmonic distortion to levels that typically avoid the need for external harmonic filters on medium-voltage networks. Supply voltage limits span 2970 to 3630 V AC. The output voltage is limited to the supply voltage level, so the motor sees the same voltage class as the incoming line. Prospective line short-circuit current is rated at 31.5 kA for 150 ms, which sets the upstream fault-clearing requirement. Overload capability is specified in two profiles: standard overload allows 1.2× In for 60 seconds and 1.5× In for 3 seconds; high overload allows 1.5× In for 60 seconds and 1.85× In for 3 seconds. The high-overload profile suits applications with heavy starting duty or cyclic overloads, such as crushers or extruders.
Physical integration and cooling
The drive is assembled in a floor-standing enclosure with separate air flows for power and control sections. Dimensions are 1600 mm depth, 8670 mm width, and 3040 mm height — this is a large, dedicated drive room installation, not a panel-mount unit. Forced convection cooling moves 80,000 m³/h of air at standard efficiency. The product composition includes two plinths, a phase-shifting transformer, medium-voltage arrestors, cooling fans, a human-machine interface, and 15 power cells. The power cells are the modular inverter stages that synthesize the output waveform; a failed cell can typically be replaced without removing the entire drive from service. Operating altitude is 1000 to 2000 m with a current derating of 0.6 % per 100 m above 1000 m. Above 2000 m, consult the derating curves in the product manual. The drive is rated for pollution degree 2 per EN/IEC 61800-5-1, which covers typical industrial environments with non-conductive pollution.
Control wiring and I/O complement
The drive provides 4 software-configurable analogue inputs (0...20 mA / 4...20 mA, 24 V max, 250 Ohm impedance) and 2 analogue outputs of the same type. Discrete inputs number 6 standard, expandable to 10 with an optional module. These I/O points handle start/stop, speed reference, and feedback signals without requiring a separate PLC for basic control. Control power requires an external 220 V AC supply at 3 kVA. The cooling fan runs on a separate 380 V AC supply. An optional 220 V AC/DC external supply for control is also listed. Electrical isolation between power and control circuits protects the low-voltage control wiring from the medium-voltage power stage. Main power connection uses bar-type terminals with M10 screws, accepting up to 6 × 40 mm² cable per phase (/R, /S, L3/T), with entry from the bottom or top. This accommodates the large cable sizes required for multi-megawatt current levels.
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. These cover electrical equipment safety, enclosure protection, EMC emissions and immunity for power drive systems, and adjustable-speed drive product standards. Dielectric strength is 20 kV AC between earth and power terminals. An integrated EMC filter is built in, simplifying installation in environments that require conducted emission limits per EN/IEC 61800-3. Noise level is rated at 80 dB — hearing protection is advisable in the drive room during operation.