75 kW at 500 V — normal duty vs heavy duty selection
The ATV6B0C11N6 is the 75 kW normal duty / 55 kW heavy duty frame in the Altivar Process ATV600 family, rated at 500 V supply. Normal duty delivers 98 A line current and 85 kVA apparent power; heavy duty drops to 72 A and 62 kVA. This split matters: if your load is a variable-torque pump or fan, normal duty covers the full 75 kW. For constant-torque loads like a conveyor or extruder, use the heavy-duty column — the drive has more thermal headroom for sustained torque at low speed. The drive handles both synchronous and asynchronous motors, so it works with permanent-magnet motors or standard induction machines. Braking is by DC injection — no built-in braking chopper, so if you need dynamic braking for overhauling loads, budget an external braking resistor and the corresponding option.
STO SIL 3 and integrated protections
That means the drive can be used in safety circuits up to SIL 3 without external safety contactors — the drive itself removes torque from the motor when the STO input is de-energized. This is the same functional safety level you'd spec for a press, robot cell, or any guarded machine where unexpected startup would be a hazard. The protection list covers both motor and drive sides: thermal protection, motor phase break, output earth fault, short circuit, DC bus overvoltage, line supply undervoltage, phase loss, and overspeed. That's a complete set — you don't need to add separate motor protection relays for most applications. The drive monitors its own health and the motor's health through the same firmware.
Modular build and fieldbus options
This is the modular version — the drive ships as separate power module, control unit, mounting kit, power connection set, and fuses. That means the power section and control section can be replaced independently. If a control board fails, you swap just the control unit without pulling the power wiring. The kit includes fuses sized for the drive, so you don't have to calculate the fuse rating from scratch. Slot A accepts communication modules for Profibus DP V1, PROFINET, DeviceNet, Modbus TCP/EtherNet/IP, or CANopen (with three connector variants). The base drive already has dual Ethernet at 10/100 Mbit/s running Modbus TCP and a 2-wire RS-485 Modbus serial port. For a new line, PROFINET or EtherNet/IP are the usual choices; for a legacy plant, Profibus or CANopen keeps the drive on the existing bus.
EMC, harmonics, and SCCR
The integrated EMC filter is rated for 300 m motor cable and meets IEC 61800-3 Category C3 — that's the second environment (industrial), so it's suitable for most factory floors without an external filter. Total harmonic current distortion is under 5% at full load per IEEE 519, which means the drive won't cause nuisance tripping of upstream breakers or overheat distribution transformers in most installations. Prospective line short-circuit current is 50 kA — that's the SCCR the drive can withstand at its input terminals. Your upstream protective device must be rated to interrupt at least that level. The pollution degree is 2 (IEC 61800-5-1), meaning the drive expects a clean, non-conductive environment inside the cabinet — no condensation, no conductive dust.
Sourced through independent distribution channels — quoted to order against your BOM quantity. No stock-holding claim; the supply posture is per-RFQ confirmation.