What the 616 A output means for your motor load
The ATV930C31N4C is a 380-480 V 3-phase variable speed drive from the Altivar Process ATV900 series, rated for 315 kW normal duty and 250 kW heavy duty. The nominal output current is 616 A at 2.5 kHz switching frequency for normal duty, dropping to 481 A at 2.5 kHz for heavy-duty applications — that's the continuous current the drive delivers to the motor without tripping on overload. Heavy duty (250 kW) means the drive handles 120% overload for 60 seconds, typical for crushers, conveyors, or extruders that need intermittent torque spikes. Normal duty (315 kW) suits centrifugal pumps and fans where the load profile is steady. The 616 A figure is the hard ceiling at the rated switching frequency — push the carrier frequency higher and you derate the current.
Panel fit and environmental tolerance
Wall-mount enclosed assembly with IP21 and UL Type 1 protection — it keeps out fingers and solid objects larger than 12 mm, but it's not sealed against dust or water spray. In a cement plant or any dusty environment, you'll want it inside a clean cabinet or add a higher-IP enclosure around it. The operating position is vertical within ±10 degrees; forced-air cooling moves 1260 m³/h through the heatsink, so clearance around the unit matters for airflow. Vibration resistance is 1.5 mm peak-to-peak at 2-13 Hz and 1 gn at 13-200 Hz per IEC 60068-2-6. Shock rating is 15 gn for 11 ms per IEC 60068-2-27. That's enough for most industrial floor installations, but if you're mounting it on a vibrating screen or near a hammer mill, check the mounting structure isolates the drive from the source. Altitude derating starts at 1000 m — above that, derate current 1% per 100 m up to 3000 m. Ambient conditions: 5-95% relative humidity without condensation per IEC 60068-2-3, pollution degree 2 environment. The drive is rated for 50°C ambient without derating in most configurations, but the cooling air volume (1260 m³/h) tells you it moves a lot of air — keep the intake and exhaust clear.
Sourced through authorized distribution channels; quoted to order against your BOM quantity. The drive accepts communication option modules for Profibus DP, PROFINET, DeviceNet, EtherCAT, CANopen, and Ethernet Powerlink in Slot A, plus I/O and encoder extension modules in Slots A/B/C.
Wiring and connection notes
Line, motor, and DC bus connections use screw terminals accepting 4 x 185 mm² or 3 x 350 kcmil — that's substantial cable for 616 A. Control wiring is 0.5-1.5 mm² (AWG 20-16) screw terminals. The external supply for digital inputs is 24 V DC (19-30 V); there's also a 10.5 V DC internal supply for a reference potentiometer (1-10 kΩ) and a separate 24 V DC (21-27 V) internal supply for digital inputs and STO. Communication ports support EtherNet/IP, Modbus serial, and Modbus TCP with transmission rates of 10/100 Mbits and 4.8-19200 bit/s for serial. The data format is 8 bits with configurable odd, even, or no parity. Up to 247 addresses on the serial bus. The drive handles both asynchronous and synchronous motors — useful if you're retrofitting a permanent-magnet motor onto an existing induction motor line.