| Altivar | ATV71HD18N4 | Drive | EXACT MATCH |
| Manufacturer | Schneider Electric |
| Catalog number | ATV71HD18N4 |
| Range | Altivar 71 |
| Product type | Variable speed drive |
| Application class | Complex, high-power machinery |
| Lifecycle note | Discontinued; exact installed configuration remains essential for replacement work |
Controls the speed and torque of three-phase synchronous or asynchronous motors in demanding machine applications.
Its control set includes sensorless flux vector control, closed-loop flux vector control with feedback, voltage/frequency profiles and the ENA energy-adaptation function.
The drive incorporates an EMC filter, graphic terminal, heat-sink construction, Modbus and CANopen connectivity.
| Motor rating | 18.5 kW / 25 hp |
| Rated supply | 380 to 480 V AC, three phase, -15% / +10% |
| Nominal output current | 41 A at 380 V; 34 A at 460 V, 4 kHz |
| Line current | 45.5 A at 380 V; 37.5 A at 480 V |
| Output frequency | 0.1 to 599 Hz |
| Switching frequency | 4 kHz nominal; 1 to 16 kHz adjustable |
| Maximum transient current | 61.5 A for 60 s; 67.7 A for 2 s |
| Dimensions | 230 x 400 x 213 mm (W x H x D) |
| Integrated interfaces | Modbus and CANopen |
| Protection functions | Motor and drive thermal, phase-loss, overvoltage, undervoltage, overcurrent and short-circuit protection |
| Power path | Three-phase AC supply → ATV71 rectifier/DC bus/inverter → motor |
| Control path | Digital and analog commands → motor-control algorithm → PWM output |
| Feedback path | Optional encoder interface enables closed-loop vector control |
| Plant network | Native Modbus/CANopen; option cards extend network integration |
| MODEL | RELATIONSHIP | SELECTION POINT |
| ATV71HD15N4 | 15 kW / 20 hp | Lower power step; recalculate load and current |
| ATV71HD18N4 | 18.5 kW / 25 hp | This model — retain exact voltage and option configuration |
| ATV71HD22N4 | 22 kW / 30 hp | Higher power step; not a drop-in sizing decision |
| ATV340D18N4 | 18 kW heavy duty | Current successor family; engineering migration required |
| ATV930D18N4 | 18.5 kW process drive | Alternative successor family; verify functions and interfaces |
| 01 | Isolate and lock out every incoming power circuit; allow the DC bus to discharge before accessing terminals. |
| 02 | Maintain the specified vertical mounting orientation, clearances and ventilation path. |
| 03 | Size upstream protection, conductors and grounding for the actual supply and motor current. |
| 04 | Record motor data, I/O assignments, communication settings, option cards and parameter set before removal. |
| 05 | A successor drive requires a complete review of dimensions, braking, safety functions, control wiring and software behavior. |
| Q1 |
Can ATV71HD18N4 be replaced only by matching 18.5 kW?
No. Confirm supply voltage, output current, overload duty, motor type, option cards, I/O, braking arrangement, safety circuit and mechanical fit.
|
| Q2 |
What current values matter when buying ATV71HD18N4?
The unit is rated 41 A at 380 V and 34 A at 460 V at 4 kHz; line current and overload duty must also be checked.
|
| Q3 |
Does ATV71HD18N4 include communications?
It supports Modbus and CANopen as standard. Any installed network option card must be matched separately.
|
| Q4 |
What should be backed up before replacing ATV71HD18N4?
Preserve the parameter set, motor nameplate data, I/O map, communication addresses, option-card details and application-specific tuning.
|
| Q5 |
Is ATV71HD18N4 still a current product?
It is discontinued. For an exact spare, confirm the full nameplate; for migration, validate an ATV340 or ATV930 solution at system level.
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