Motor sizing: the ND vs HD split decides your real load
The ATV6B0C35T4 carries two distinct ratings: 550 HP at 480 V in normal duty and 450 HP at 480 V in heavy duty, with corresponding apparent power of 443 kVA ND and 362 kVA HD. Heavy duty typically applies to constant-torque loads like conveyors or extruders; normal duty suits variable-torque fans and pumps where the headroom isn't needed. Line current at 480 V is 533 A for normal duty and 436 A for heavy duty. The switching frequency is adjustable from 2 to 8 kHz, but above 2.5 kHz a derating factor applies — if you need quieter motor operation at higher carrier frequencies, the output current ceiling drops proportionally. Prospective line short-circuit current (SCCR) is 50 kA. That is high enough for most industrial mains, but the upstream breaker must be coordinated to keep the drive protected — check the selective coordination tables in the installation manual.
Fieldbus and control: what ships on the base unit
The drive includes a Modbus serial port (2-wire RS-485, RTU frame, 1-247 addresses) and a Modbus TCP/Ethernet port (10/100 Mbit/s, half/full duplex, auto-negotiation). Slot A accepts optional communication modules for Profibus DP V1, PROFINET, DeviceNet, Modbus TCP/EtherNet/IP, or CANopen (daisy chain RJ45, SUB-D 9, or screw terminals). The data format on Modbus serial is 8 bits with configurable odd, even, or no parity. For Ethernet/IP, the transmission rate is 10/100 Mbit/s — no speed negotiation issues with modern switches.
Safety and protection: STO SIL 3 and the protection map
That means the drive can be used in safety circuits up to SIL 3 without external contactors for the torque removal function — the drive's own power stage is the isolating element. The protection suite covers both motor and drive sides: thermal protection, motor phase break, overcurrent between output phases and earth, short-circuit protection, overvoltage on the DC bus, line supply over/undervoltage, line phase loss, and overspeed. For the motor, it also includes thermal protection and phase break detection.
Environmental limits and installation constraints
Operating altitude is 1000 to 4800 m with current derating above 1000 m — at 2000 m expect roughly a 10% output current reduction. The drive is cabinet mount only (UL Type 1 or Type 12 per UL 61800-5-1 when integrated into an enclosure). Vibration resistance is 1.5 mm peak-to-peak from 2 to 13 Hz and 0.5 gn from 13 to 200 Hz per IEC 60068-2-6. Shock resistance is 4 gn for 11 ms per IEC 60068-2-27. Relative humidity range is 5 to 95% without condensation per IEC 60068-2-3. The integrated EMC filter covers 300 m of motor cable per IEC 61800-3 category C3 — that is the second environment (industrial mains). For first-environment (residential) installations, an external filter may be needed.
Lifecycle and sourcing: active, modular, quoted to order
The kit composition includes: 1 control unit, mechanical mounting kits, power connection set, set of fuses, 1 power module (160 kW), and 1 front cover. Marking is CE, confirming conformity with EU directives. Standards compliance includes IEC 61800-3 (EMC), IEC 61800-5-1 (safety), IEC 61000-3-12 (harmonic limits), IEC 60721-3 (environmental conditions), IEC 61508 and IEC 13849-1 (functional safety).