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20BC481N0ANNNNC0 Detailed Product Information, Technical Specifications, Applications and Related Models

Note: You asked me not to use the internet or include sources. I will therefore present this as a self-contained technical reference and will not include web links or a source list. Because this is a discontinued high-power drive and exact mechanical dimensions can vary with enclosure and mounting configuration, dimensions and weight should be treated as engineering reference values rather than fabrication dimensions.

1. Product Identification

The 20BC481N0ANNNNC0 is a high-power variable-frequency AC drive belonging to the PowerFlex 700 product family.

It is designed for controlling large three-phase AC motors in industrial machinery and process equipment.

The model is a 400 VAC-class, three-phase, 481 A drive, with a rated capacity of approximately 280 kW for Normal Duty and 240 kW for Heavy Duty.

It is a large-frame industrial drive intended for applications where motor current, starting torque, controlled acceleration, speed regulation and reliable operation under changing loads are important.

The configuration is an open-type / IP00 arrangement and is normally incorporated into a properly designed electrical cabinet or drive system rather than being treated as a small standalone enclosed inverter.

The model uses vector control with 24 V I/O. The standard configuration identified by the catalog number does not include a HIM operator interface, internal brake IGBT, internal drive-mounted braking resistor, internal communication module or feedback option.

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2. Brand and Series

The most important identification is therefore:

PowerFlex 700 — 400 VAC — 481 A — 280 kW Normal Duty — 240 kW Heavy Duty — Frame 8 — Vector Control — 24 V I/O.

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3. Product Introduction

The 20BC481N0ANNNNC0 is intended for large industrial motor-control applications where a conventional fixed-speed motor starter does not provide sufficient control flexibility.

A variable-frequency drive changes the frequency and voltage supplied to the motor, allowing the motor to operate at different speeds according to the process requirement.

This makes the drive suitable for machinery in which the motor does not always need to operate at full speed.

For example, a large conveyor can be accelerated gradually instead of being started abruptly.

A large pump can be operated at a reduced speed when process demand decreases.

A large fan can adjust airflow by changing motor speed.

A mixer can be accelerated according to the characteristics of the material being processed.

A high-inertia machine can be stopped using a controlled deceleration profile rather than simply removing power from the motor.

The 20BC481N0ANNNNC0 is therefore best understood as a large industrial motor-control platform, rather than simply a high-power electronic switch.

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4. Main Technical Parameters

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5. Electrical Rating

The most important electrical characteristic of this drive is its 481 A current rating.

A current capacity of this magnitude places the unit in the large industrial drive category.

It is suitable for motors whose operating current falls within the drive’s applicable rating after considering duty, ambient temperature, overload requirements, installation conditions and motor characteristics.

The distinction between Normal Duty and Heavy Duty is important.

The drive should not simply be selected according to the motor’s nominal kW rating.

Motor current, overload requirements, acceleration requirements and application duty should all be considered.

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6. Normal-Duty and Heavy-Duty Ratings

The drive can be considered in two basic application categories.

Normal Duty is generally associated with applications where the motor load and overload cycle are comparatively moderate.

Heavy Duty is more appropriate where the machine demands greater torque or experiences more demanding overload conditions.

This difference becomes particularly important for crushers, heavy conveyors, feeders and mixers.

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7. Vector Control

The 20BC481N0ANNNNC0 uses a vector-control architecture.

Vector control provides more sophisticated motor regulation than basic scalar or volts-per-hertz control.

The drive can use motor electrical characteristics to provide improved control of motor torque and speed.

This is particularly valuable when the load is changing.

Examples include a conveyor whose material load varies throughout the production cycle.

Another example is a mixer where the material becomes more difficult to move as the process progresses.

In these situations, maintaining predictable motor behavior is more important than simply producing a fixed output frequency.

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8. Product Configuration

This configuration is especially suitable when the drive is going to be integrated into a larger industrial control cabinet.

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9. Dimensions and Weight

Because this is a Frame 8 high-power drive, physical size and weight are major considerations.

A representative open-frame arrangement is approximately:

• Height: 2283.7 mm
• Width: 757.8 mm
• Depth: configuration dependent
• Weight: approximately 384 kg

These figures should not be used as final cabinet-fabrication dimensions without checking the exact mechanical drawing for the particular installation.

For some enclosed Frame 8 arrangements, the overall assembly can be substantially larger and heavier.

A representative enclosed arrangement can reach approximately 2349.1 mm × 757.9 mm × 898.8 mm, with a weight of approximately 509 kg.

Therefore, the exact enclosure version must always be identified before final mechanical design.

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10. Why the Size Is Important

A 384 kg drive cannot be treated like a compact wall-mounted VFD.

The installation requires proper consideration of:

• Cabinet structure.
• Floor loading.
• Lifting equipment.
• Transportation.
• Cable routing.
• Ventilation.
• Service access.
• Heat dissipation.
• Maintenance clearance.
• Power-terminal accessibility.

The cabinet must also be designed to support the drive mechanically.

For large installations, the weight of the drive itself can affect the design of the complete electrical room or MCC arrangement.

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11. Product Applications

11.1 Large Conveyor Systems

Large conveyors are one of the most suitable applications for this type of drive.

A long conveyor can have substantial mechanical inertia.

Starting the motor directly can produce a sudden torque impulse.

The drive allows the acceleration process to be controlled.

A typical operating sequence could be:

Start Command → Low-Speed Acceleration → Operating Speed → Process Speed Adjustment → Controlled Deceleration → Stop

This can reduce mechanical shock on:

• Belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Conveyor structures.

The speed can also be adjusted according to production requirements.

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12. Mining and Bulk Material Handling

Large material-handling systems often require motors with substantial current capacity.

Typical equipment can include:

• Belt conveyors.
• Feeders.
• Transfer conveyors.
• Crushers.
• Material elevators.
• Large processing equipment.

In these applications, the drive’s high current capacity and Heavy-Duty capability are particularly useful.

The exact suitability depends on the motor nameplate current and the machine’s torque requirements.

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13. Large Pump Systems

The drive can also be used with large industrial pumps.

A pump does not necessarily need to run at full speed continuously.

When process demand changes, the drive can adjust the motor speed.

This can provide better process control and, for suitable centrifugal pumping systems, can reduce energy consumption compared with operating continuously at maximum speed.

Typical applications include:

• Industrial water circulation.
• Cooling water.
• Process water.
• Water treatment.
• Industrial pumping.
• Utility systems.

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14. Large Fan Systems

Large fans can consume substantial amounts of electrical power.

Variable-speed operation can allow airflow to follow actual process requirements.

Applications include:

• Industrial ventilation.
• Exhaust systems.
• Furnace ventilation.
• Dust collection.
• Cooling systems.
• Air-handling equipment.

The drive can regulate fan speed rather than relying solely on mechanical dampers or continuously operating the motor at maximum speed.

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15. Blower Applications

Large blowers can also benefit from variable-frequency operation.

The motor can be accelerated smoothly and then operated at a process-specific speed.

This can be particularly useful in:

• Industrial air systems.
• Process-air equipment.
• Combustion systems.
• Waste-treatment equipment.
• Pneumatic processes.
• Industrial ventilation.

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16. Compressor Applications

Large compressors may also use high-power variable-frequency drives.

The drive can provide controlled acceleration and speed regulation where the compressor’s mechanical design allows variable-speed operation.

Before applying the drive to a compressor, engineers should check:

• Minimum operating speed.
• Maximum operating speed.
• Lubrication requirements.
• Cooling requirements.
• Pressure range.
• Resonance zones.
• Acceleration requirements.
• Motor current.

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17. Mixer Applications

Industrial mixers can have high starting torque.

The material inside the mixing vessel may make the motor difficult to start.

The drive can provide a controlled acceleration profile and regulate operating speed.

Typical applications include:

• Chemical mixing.
• Slurry mixing.
• Material blending.
• Food processing.
• Batch processing.
• Industrial material preparation.

The Heavy-Duty rating can be particularly relevant for machines with high starting torque or frequent load changes.

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18. Crusher Applications

Crushers are among the more demanding industrial applications.

The mechanical load can change significantly as material enters the crusher.

There can also be substantial torque fluctuations.

A high-current vector-controlled drive can provide a more controlled motor response.

However, application-specific overload and mechanical protection requirements must be checked carefully before selecting the drive.

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19. Material Processing Equipment

The drive can be applied to large process machines where speed needs to be controlled.

Potential equipment includes:

• Rollers.
• Large mixers.
• Feed systems.
• Processing machines.
• Extrusion-related equipment.
• Material handling.
• Industrial production lines.

The ability to adjust speed can help synchronize different stages of a production process.

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20. Main Product Advantages

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21. Advantage: High Current Capacity

The 481 A current rating is one of the most important advantages of this model.

Many industrial applications cannot be handled by small or medium-size drives because the motor requires too much current.

The 20BC481N0ANNNNC0 is designed for this higher-current category.

This makes it particularly relevant to large machines where the motor power is measured in hundreds of kilowatts.

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22. Advantage: Controlled Starting

A large motor can draw significant current during starting if it is connected directly to the electrical supply.

A variable-frequency drive can control the acceleration process.

The motor can be brought gradually from zero speed toward the desired operating speed.

This can reduce mechanical shock and make the starting sequence easier to manage.

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23. Advantage: Adjustable Speed

The motor does not have to operate at one fixed speed.

The drive can change the output frequency and therefore regulate motor speed.

This provides considerable flexibility.

For example:

Low Production → Lower Speed

Normal Production → Normal Speed

High Production → Higher Speed

The exact speed range must always remain within the motor and machine manufacturer’s allowable limits.

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24. Advantage: Improved Process Control

A motor is often only one component of a larger process.

The process may require:

• Constant pressure.
• Constant flow.
• Controlled material speed.
• Adjustable production rate.
• Controlled mixing.
• Coordinated conveyor speed.

A variable-frequency drive can provide the motor-speed component required for these control strategies.

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25. Advantage: Large Industrial Integration

The drive can be incorporated into an industrial automation system.

A simplified architecture is:

PLC / Controller

↓

Drive Control Interface

↓

20BC481N0ANNNNC0

↓

Three-Phase AC Motor

↓

Mechanical Machine

The controller can provide run commands, speed references, stop commands, fault-reset commands and other process signals.

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26. Braking Configuration

The reference configuration does not include an internal brake IGBT.

It also does not include an internal drive-mounted braking resistor.

This is important for high-inertia machines.

When a motor decelerates, mechanical energy can be returned electrically to the drive’s DC bus.

If the deceleration process produces more regenerated energy than the drive can naturally handle, an external energy-management solution may be required.

Possible approaches include:

• External dynamic braking.
• External braking resistor.
• Regenerative equipment.
• Mechanical braking.
• Combined electrical and mechanical braking.

The correct solution depends on the machine inertia, required stopping time and application requirements.

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27. Communication Configuration

The reference model does not include an internal communication module.

This means the automation system should be designed around the available I/O and any separately installed communication hardware.

A control system can still use hardwired control signals.

Typical signals may include:

• Start.
• Stop.
• Enable.
• Speed reference.
• Fault.
• Running.
• At speed.
• Fault reset.
• Interlock.

For a modernization project, the existing control architecture should be documented before selecting a replacement drive.

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28. Cooling and Thermal Management

A drive of this size generates significant heat.

The cabinet must therefore provide sufficient cooling.

The cooling design should consider:

Poor airflow can raise semiconductor temperature and reduce equipment reliability.

For this reason, cabinet ventilation is not a secondary consideration.

It is part of the drive system design.

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29. Installation Requirements

The installation should be planned around the actual mechanical and electrical configuration.

Important points include:

Electrical Supply

The incoming supply must be compatible with the drive’s voltage class.

Motor

The motor voltage and full-load current must be checked.

Duty

Normal Duty and Heavy Duty must be correctly identified.

Cable

Input and motor cables must be correctly sized.

Grounding

The grounding system must comply with the applicable electrical requirements.

Cabinet

The IP00 drive requires appropriate enclosure protection.

Ventilation

The cabinet must dissipate the heat generated by the drive.

Maintenance

Sufficient access should be provided for inspection and service.

Lifting

The several-hundred-kilogram drive requires suitable lifting equipment.

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30. Five Same-Series or Closely Related Models

The following models are useful for comparison within the same product family or closely related configurations.

The models above should be regarded as related selection options, not automatic drop-in replacements.

Voltage class, current rating, overload characteristics, mechanical dimensions, enclosure and accessories all need to be checked before substitution.

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31. Comparison with 20BC415N0ANNNNC0

The 415 A version is a logical lower-current comparison.

This model is appropriate when the motor’s current requirement is below the 481 A class.

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32. Comparison with 20BC535N0ANNNNC0

The 535 A version provides more current capacity than the reference model.

This can be considered when additional current capacity is needed.

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33. Comparison with 20BD481N0ANNNNC0

This is the corresponding 480 VAC-class comparison.

The major difference is the voltage class.

The two models should not be interchanged simply because their current ratings are identical.

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34. Comparison with 20BC600N0ANNNNC0

The 600 A class provides additional current capacity.

This model becomes relevant when the motor’s current requirement approaches or exceeds the 481 A range.

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35. Five Popular Same-Brand Models for Broader Comparison

The following products are useful when comparing different drive sizes and product generations within the same brand family.

These are not direct replacements for the 481 A drive.

They represent different current ranges and application classes.

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36. PowerFlex 525 Compared with the Reference Model

The PowerFlex 525 is intended for much smaller motors.

This comparison demonstrates the enormous difference between a 481 A industrial drive and a compact drive.

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37. PowerFlex 753 Compared with the Reference Model

The PowerFlex 753 family is intended for industrial applications requiring more advanced control and system functionality.

A PowerFlex 753 should be selected according to actual motor current rather than as a direct numerical replacement for the 481 A model.

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38. PowerFlex 755 Compared with the Reference Model

The PowerFlex 755 family is particularly relevant when looking at newer high-performance industrial drive architectures.

For a new industrial system, a current-generation platform may offer advantages in communications, diagnostics, control architecture and lifecycle support.

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39. Selection Guide

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40. Important Points When Selecting a Replacement

A replacement should not be selected simply because the replacement model has a similar horsepower rating.

The following parameters should be compared.

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41. Maintenance Considerations

Because the drive is a large industrial electronic assembly, regular maintenance is important.

Typical maintenance activities include:

• Inspecting cooling fans.
• Checking cabinet ventilation.
• Removing excessive dust.
• Checking electrical connections.
• Inspecting power terminals.
• Inspecting grounding.
• Monitoring operating temperature.
• Checking unusual fan noise.
• Reviewing fault history.
• Checking control wiring.
• Inspecting cabinet filters.
• Checking for signs of overheating.

For critical production equipment, maintaining a replacement strategy is especially important.

A spare drive, spare power components or a planned modernization path can reduce production downtime.

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42. Advantages for Existing Installations

The 20BC481N0ANNNNC0 can remain valuable in existing systems because replacing a large industrial drive is not always a simple matter.

A replacement may require changes to:

• Cabinet dimensions.
• Power cabling.
• Control wiring.
• PLC programming.
• Communication architecture.
• Motor parameters.
• Braking system.
• Cooling system.
• Mechanical mounting.
• Safety circuits.

Therefore, maintaining an existing drive can sometimes be less disruptive than immediately redesigning the complete installation.

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43. Limitations

The product also has limitations that should be considered.

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44. Overall Technical Assessment

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45. Final Product Summary

The 20BC481N0ANNNNC0 is a high-power PowerFlex 700 adjustable-frequency AC drive intended for large three-phase industrial motors.

Its principal electrical rating is:

400 VAC class / 3-phase / 481 A / 280 kW Normal Duty / 240 kW Heavy Duty.

The drive uses vector control and 24 V I/O, and its configuration is based on a Frame 8 open-type / IP00 installation.

The approximate open-frame mechanical reference is:

Height: 2283.7 mm

Width: 757.8 mm

Depth: configuration dependent

Weight: approximately 384 kg

This makes it a substantial industrial electrical assembly.

Its main strengths are high current capacity, high motor-power capability, controlled acceleration, adjustable speed, vector control and suitability for demanding industrial applications.

The drive is particularly appropriate for large:

• Conveyors.
• Pumps.
• Fans.
• Blowers.
• Mixers.
• Crushers.
• Feeders.
• Material-handling systems.
• Process machinery.
• Industrial production equipment.

For comparison, the most relevant same-family models include 20BC415N0ANNNNC0, 20BC535N0ANNNNC0, 20BD481N0ANNNNC0, 20BD535N0ANNNNC0 and 20BC600N0ANNNNC0.

The 415 A model is the lower-current option, the 535 A and 600 A models provide additional current capacity, while the 480 VAC models are intended for a different supply-voltage class.

For broader product selection, the PowerFlex 525, PowerFlex 753 and PowerFlex 755 families provide alternatives covering smaller machines and newer industrial drive architectures.

The key point when evaluating this model is that 481 A is more important than the nominal horsepower number alone.

For a real installation or replacement, the final selection should be based on the motor nameplate current, supply voltage, duty classification, overload requirement, load inertia, braking requirement, control method, feedback requirement, communication architecture, cabinet dimensions, cooling conditions and installation environment.

In practical terms, the 20BC481N0ANNNNC0 is best viewed as a high-power, Frame 8 industrial drive for large motor applications where controlled speed and torque are required and where a substantial cabinet installation is acceptable.