Allen-Bradley 20G1ABC460AN2NNNNN PowerFlex 755 AC Drive – Detailed Product Information, Specifications, Applications and Related Models

The Allen-Bradley 20G1ABC460AN2NNNNN is a high-power PowerFlex 755 AC variable frequency drive (VFD) designed for demanding industrial motor-control applications. It belongs to the PowerFlex 750-Series family and is intended for large three-phase motor systems where accurate speed control, reliable torque management, industrial networking, and flexible control functions are important.

This model is an air-cooled, Frame 8, 400 VAC-class drive with a 460 A current rating. Its configuration includes an AC input with precharge and no DC terminals, an EMC filter, and no dynamic braking. The drive is intended for large industrial installations and is particularly suitable for applications involving pumps, fans, conveyors, compressors, process equipment, material handling, and other heavy industrial machinery.

The catalog number 20G1ABC460AN2NNNNN is also a configuration-specific model number, so the complete catalog number should be used when matching an existing installation, replacement unit, spare, or control cabinet.

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1. Basic Product Information

Important note regarding dimensions and weight: the exact mechanical dimensions and shipping/installation weight can vary with the complete cabinet configuration, accessories, wiring assemblies, enclosure arrangement, and installed options. For engineering and cabinet fabrication, the final mechanical drawing for the exact configuration should be treated as the controlling document. The 600 mm depth class and approximately 300–400 kg weight range are useful planning values rather than certified dimensional values.

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2. Product Introduction

The 20G1ABC460AN2NNNNN is a large-frame PowerFlex 755 AC drive intended for industrial motor applications requiring substantially more power and current than conventional wall-mounted drives.

With a 460 A output current rating, the drive is suitable for large motors used in production lines, material-handling systems, process machinery, pumping stations, ventilation systems, compressors, and other industrial equipment.

The PowerFlex 755 architecture is designed around flexible motor control rather than simple fixed-speed operation. It allows the motor speed to be adjusted according to process requirements, which can improve production control and reduce unnecessary energy consumption.

For applications where a motor does not need to operate continuously at full speed, variable-frequency control can provide a significant operational advantage compared with direct-on-line motor starting or fixed-speed operation.

The model uses forced-air cooling, which is particularly appropriate for high-power industrial drives. At this power level, thermal management becomes an important part of system design. The large-frame construction provides the physical space required for power components, cooling systems, control electronics, wiring, and other drive hardware.

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3. Understanding the Model Number

The complete catalog number is:

20G1ABC460AN2NNNNN

The catalog number contains configuration information that identifies the drive family, power/current class, input arrangement, filtering configuration, and other factory-defined options.

For purchasing, maintenance, and replacement work, it is important to use the complete catalog number rather than identifying the product only as “PowerFlex 755 460 A.”

Two PowerFlex 755 drives can have the same basic current rating while having different input configurations, filtering arrangements, enclosure configurations, braking options, or other factory selections.

Therefore, when replacing an existing drive, the full model number should be checked against the existing nameplate and installation requirements.

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4. Main Electrical Parameters

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5. LD, ND and HD Power Ratings

One important characteristic of the PowerFlex 755 is that the same drive can have different applicable power ratings depending on the operating duty.

For this model, the commonly referenced ratings are:

This distinction is important when selecting a drive.

A motor’s nameplate power alone should not be used as the only selection criterion. The actual load profile, starting torque, acceleration requirements, overload requirements, operating speed range, ambient conditions, and duty cycle should also be considered.

For example, a 250 kW motor with a relatively easy variable-torque load may be suitable under one duty classification, while a high-inertia conveyor or crusher application could require a heavier-duty selection.

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6. Cooling System

The 20G1ABC460AN2NNNNN uses forced-air cooling.

At 460 A, heat dissipation is a major consideration. The cooling system continuously moves air through the drive to remove heat generated by the power semiconductors and other internal components.

This makes installation airflow particularly important.

The cabinet should provide adequate ventilation and should not obstruct the drive’s cooling-air path. Excessive ambient temperature, blocked air passages, dirty filters, or insufficient cabinet ventilation can shorten component life and cause thermal protection to activate.

For large industrial installations, the cooling system should therefore be considered part of the overall drive installation rather than an isolated feature of the VFD.

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7. Input Configuration

The model uses an AC input with precharge and no DC terminals.

The precharge function is important for managing DC-bus charging during energization.

Instead of allowing the DC bus capacitors to be exposed to an uncontrolled initial charging current, the precharge arrangement manages the charging process during startup.

The no DC terminals configuration also distinguishes this model from PowerFlex configurations intended for applications requiring external DC-bus connections or common-bus arrangements.

This distinction is important when selecting a replacement drive because the input architecture must match the electrical system.

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8. EMC Filtering

The 20G1ABC460AN2NNNNN is configured with an EMC filter.

Electromagnetic compatibility is an important consideration in industrial environments because high-power switching devices can generate electrical noise.

The EMC filter helps control conducted high-frequency electrical disturbances associated with the drive system.

This can be especially useful in installations containing:

• PLC systems
• Industrial Ethernet networks
• Instrumentation
• Sensors
• Measurement equipment
• Communication equipment
• Analog control circuits
• Safety systems
• Other sensitive electronic equipment

Correct grounding, cable routing, motor cable selection, shielding, and cabinet design remain important even when an EMC filter is installed.

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9. Communication Capability

The PowerFlex 755 platform supports modern industrial automation architectures and can be integrated into control systems using industrial Ethernet communication.

The 20G1ABC460AN2NNNNN belongs to the configuration family with embedded EtherNet/IP capability.

This allows the drive to participate in a networked automation system rather than operating only through local hardwired signals.

A networked drive can exchange information such as:

• Start and stop commands
• Speed references
• Output frequency
• Motor current
• Drive status
• Fault information
• Warning conditions
• Operating parameters
• Diagnostic information
• Process-related control data

This can reduce the amount of hardwired control wiring required and can make centralized monitoring easier.

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10. Motor Control Functions

The PowerFlex 755 family is designed for sophisticated AC motor control.

Depending on the selected control configuration and motor type, the platform can support different motor-control strategies, including:

• Volts-per-Hertz control
• Sensorless vector control
• High-performance vector control
• Closed-loop control with appropriate feedback hardware
• Permanent-magnet motor control in supported configurations

This flexibility makes the PowerFlex 755 platform suitable for both relatively simple speed-control applications and more demanding industrial machinery.

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11. Product Applications

11.1 Conveyor Systems

The 20G1ABC460AN2NNNNN is well suited to large conveyor systems.

Conveyors often require controlled acceleration and deceleration, especially when handling heavy materials.

A large drive can provide controlled motor starting instead of subjecting the mechanical system to the sudden torque associated with direct-on-line starting.

Typical applications include:

• Mining conveyors
• Bulk material conveyors
• Cement conveyors
• Steel production conveyors
• Warehouse material-handling systems
• Port and terminal conveyors
• Aggregate handling
• Large production-line conveyors

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11.2 Pumps

Large industrial pumps are another major application.

The drive can regulate pump speed according to process demand.

Instead of running a pump continuously at full speed and controlling flow through throttling, variable-speed operation can allow the motor speed to follow the process requirement.

Typical applications include:

• Water treatment
• Industrial water systems
• Cooling-water systems
• Process pumps
• Circulation pumps
• Irrigation systems
• Chemical processing
• Wastewater systems

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11.3 Fans and Blowers

Large fans and blowers can benefit from variable-speed control.

Applications include:

• Industrial ventilation
• Furnace ventilation
• Dust collection
• Exhaust systems
• HVAC systems
• Process air systems
• Combustion air systems
• Industrial drying systems

The ability to adjust speed according to actual airflow requirements can improve process control and potentially reduce energy consumption.

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11.4 Compressors

The drive can also be applied to large compressor systems where adjustable motor speed is required.

Applications may include:

• Industrial air compressors
• Process gas compressors
• Ventilation compressors
• Refrigeration-related systems
• Production equipment

For compressor applications, acceleration requirements and motor torque characteristics should be evaluated carefully before selecting the final drive size.

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11.5 Material Handling

Large material-handling machines often require high starting torque and controlled acceleration.

The PowerFlex 755 platform is appropriate for equipment such as:

• Hoisting equipment
• Large conveyors
• Transfer systems
• Feeders
• Bulk material handling
• Production machinery
• Industrial lifting equipment

Additional feedback, braking, or safety options may be required depending on the machine design.

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11.6 Process Machinery

The drive can be integrated into large process machines where speed must be controlled continuously.

Examples include:

• Mixers
• Agitators
• Extruders
• Rollers
• Winding systems
• Processing lines
• Large machine tools
• Industrial production equipment

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12. Major Product Advantages

12.1 High Current Capacity

One of the most obvious advantages is the 460 A current rating.

This places the drive in the large industrial-drive category and allows it to control substantially larger motors than compact VFDs.

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12.2 Flexible Duty Ratings

The LD, ND and HD rating structure allows engineers to evaluate the drive according to the actual load requirement.

This is useful because industrial loads are not all the same.

A fan may have a different torque requirement from a conveyor, while a crusher or high-inertia machine may have significantly higher starting and acceleration requirements.

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12.3 Integrated Industrial Networking

Embedded EtherNet/IP capability makes the drive suitable for networked automation systems.

This simplifies integration into larger control architectures and allows operational information to be made available to the automation system.

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12.4 Advanced Motor Control

The PowerFlex 755 platform provides more sophisticated control capabilities than a basic V/Hz-only drive.

This can improve:

• Speed regulation
• Torque response
• Acceleration control
• Deceleration control
• Process stability
• Motor performance

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12.5 Large Industrial Frame

The Frame 8 construction provides a large physical platform for high-power components.

This is appropriate for large industrial installations where a small wall-mounted VFD is not practical.

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12.6 EMC Filtering

The built-in EMC filter configuration helps address conducted electromagnetic interference.

This is particularly valuable in modern automation environments where the drive shares an electrical system with PLCs, network equipment, sensors, instrumentation, and other electronic devices.

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12.7 Forced-Air Cooling

Forced-air cooling is appropriate for a high-current drive because it provides active thermal management.

This makes the drive suitable for properly engineered industrial cabinets and equipment rooms.

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12.8 Broad Application Range

The PowerFlex 755 platform can be used across many industries rather than being limited to one particular machine type.

Its application flexibility is one of the strongest reasons to consider this product family for large motor-control projects.

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13. Installation Considerations

Because the 20G1ABC460AN2NNNNN is a large Frame 8 drive, installation should be planned carefully.

Important considerations include:

Cabinet Space

The drive requires substantially more physical space than small wall-mounted VFDs.

The approximately 600 mm depth class should be considered during preliminary cabinet planning.

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Ventilation

The forced-air cooling system requires adequate airflow.

The cabinet should not restrict the drive’s cooling path.

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Cable Routing

High-power motor cables should be routed separately from sensitive signal wiring whenever practical.

This helps reduce electrical noise and improves overall system reliability.

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Grounding

A suitable grounding system is essential.

Poor grounding can contribute to:

• Communication problems
• Electrical noise
• Faults
• EMC issues
• Unstable control signals

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Motor Cable Selection

The motor cable should be selected according to:

• Motor current
• Cable length
• Installation method
• Voltage class
• EMC requirements
• Environmental conditions
• Applicable electrical standards

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Cabinet Thermal Design

The heat generated by a large drive should be considered in the cabinet thermal calculation.

If other equipment is installed in the same enclosure, the total heat load must be evaluated.

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14. Maintenance Considerations

Regular maintenance is particularly important for large industrial drives.

Recommended maintenance activities can include:

• Checking cooling fans
• Inspecting air passages
• Cleaning accumulated dust
• Checking electrical connections
• Inspecting control wiring
• Checking cabinet temperature
• Checking for abnormal noise
• Checking for unusual vibration
• Reviewing drive fault history
• Inspecting motor cables
• Checking grounding connections
• Inspecting ventilation equipment

The cooling system deserves special attention because fan performance directly affects the thermal condition of the drive.

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15. Typical Industrial Benefits

When correctly selected and installed, the 20G1ABC460AN2NNNNN can provide several practical benefits:

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16. Five Related Models in the Same PowerFlex 755 Series

The following models are closely related to the 20G1ABC460AN2NNNNN and are useful when comparing current ratings, power levels, and replacement options.

Comparison

The 20G1ABC460AN2NNNNN is positioned toward the lower-current end of this particular large-frame 400 VAC group.

The 540 A version increases current capacity while maintaining a similar general physical class.

The 567 A model provides a further increase in current and LD capacity.

The 650 A model is a substantially higher-capacity option and may be appropriate where the 460 A model does not provide enough motor current or overload margin.

The 20G1ABC460JN2NNNNN is particularly important because it represents the direct replacement configuration for the original model.

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17. Five Popular Allen-Bradley Models for Comparison

These models provide a useful comparison across the high-power PowerFlex 755 range.

The first four are particularly useful when the application uses a 400 VAC-class supply and the engineer needs to select the correct current and power capacity.

The 690 VAC model is more suitable for high-voltage industrial systems and should not be treated as a direct electrical replacement for a 400 VAC drive without a complete system review.

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18. Detailed Mechanical Parameter Reference

Because Frame 8 equipment is substantially larger and heavier than smaller PowerFlex drives, cabinet installation and mechanical handling should be planned before delivery.

The actual shipping weight may also be different from the bare-drive weight because packaging, field wiring assemblies, accessories, enclosure components, or other options can change the final mass.

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19. Product Selection Advantages Compared with Smaller Drives

For a large industrial motor, selecting a 460 A-class PowerFlex 755 rather than a smaller VFD provides several important benefits.

First, the current capacity is significantly higher.

Second, the large-frame architecture is better suited to industrial power distribution systems.

Third, the PowerFlex 755 platform provides advanced motor-control functions that can be useful when the machine requires precise speed or torque control.

Fourth, the embedded industrial networking capability makes it easier to integrate the drive into a larger automation system.

Finally, the PowerFlex 755 platform has a broad range of related models, making it easier to select a higher or lower current rating without changing to a completely different drive architecture.

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20. Recommended Applications by Load Type

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21. Key Advantages at a Glance

The most important characteristics of the 20G1ABC460AN2NNNNN can be summarized as follows:

• 460 A high-current output
• 400 VAC three-phase class
• PowerFlex 755 platform
• Frame 8 construction
• Forced-air cooling
• AC input with precharge
• No DC terminals
• EMC filter configuration
• No dynamic braking
• Embedded EtherNet/IP
• Large industrial motor capability
• 315 kW LD rating
• 250 kW ND rating
• 200 kW HD rating
• Approximately 600 mm depth class
• Approximately 300–400 kg planning weight
• Suitable for large industrial machinery
• Suitable for networked automation
• Flexible motor-control architecture
• Broad family of related PowerFlex 755 models

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22. Brand and Product Family

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23. Overall Product Evaluation

The Allen-Bradley 20G1ABC460AN2NNNNN is best understood as a large-capacity industrial PowerFlex 755 drive intended for demanding three-phase motor-control applications.

Its 460 A rating, 400 VAC class, Frame 8 construction, and 315/250/200 kW LD/ND/HD ratings place it firmly in the high-power industrial category.

The model is particularly attractive for installations where the motor needs controlled speed, controlled acceleration, centralized monitoring, and integration into a larger automation network.

Its EMC filter configuration is another useful characteristic for modern industrial installations, especially where the drive operates alongside sensitive control electronics and communication equipment.

The AC input with precharge and no DC terminals configuration should, however, be considered carefully when replacing another drive. The electrical architecture of the existing system must match the replacement configuration.

For applications requiring dynamic braking, external braking arrangements or a different drive configuration may need to be considered because this specific model is configured with no dynamic braking.

The large Frame 8 construction also means that this is not a small plug-in VFD. Mechanical installation, cabinet ventilation, thermal management, power-cable routing, grounding, and service access all need to be incorporated into the equipment design.

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24. Final Specification Summary

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25. Recommended Related Models

For a direct comparison around the same application range, the following five models are particularly useful:

For broader same-brand comparison, the following five models provide a useful high-power selection range:

Overall, the 20G1ABC460AN2NNNNN is a strong choice for large industrial motor applications where high current capacity, variable-speed operation, network integration, advanced motor control, EMC filtering, and forced-air cooling are required. Its 460 A / 400 VAC / Frame 8 configuration makes it particularly suitable for large-scale machinery and process equipment rather than small or medium-duty motor applications.