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Allen-Bradley 20G1ABF460AN0NNNNN PowerFlex 755 AC Drive

1. Product Identification

Model / Catalog Number: 20G1ABF460AN0NNNNN

Brand: Allen-Bradley

Product Family: PowerFlex 750 Series

Product Series: PowerFlex 755

Product Type: Air-Cooled AC Variable Frequency Drive

Drive Classification: PowerFlex 755 AC Drive

Frame Size: Frame 8

Input Voltage: 690 VAC, three-phase

Rated Current: 460 A

Cooling Method: Forced-air / air-cooled

Enclosure Style: Type 1, IP20, 600 mm deep MCC-style construction

Input Configuration: AC input with precharge, without DC terminals

Dynamic Braking: None

Human Interface Module: Blank / no HIM supplied

Communication: Embedded EtherNet/IP

Filtering: EMC filter configuration

CM Jumper Configuration: CM jumper removed

Original Lifecycle Status: Discontinued

Direct Replacement: 20G1ABF460JN0NNNNN

The 20G1ABF460AN0NNNNN is a high-power PowerFlex 755 variable-frequency drive intended for large three-phase industrial motors and demanding speed-control applications. It belongs to the 690 V class of the PowerFlex 755 platform and uses a Frame 8 power section.

The catalog configuration is rated at 460 A and provides approximately 500 kW light-duty, 450 kW normal-duty, and 375 kW heavy-duty capability. The unit uses forced-air cooling and is configured as a 600 mm deep MCC-style drive with an IP20 / Type 1 enclosure arrangement.

The original 20G1ABF460AN0NNNNN has been discontinued, with the documented direct replacement being 20G1ABF460JN0NNNNN. The replacement retains the principal 690 V, 460 A, Frame 8 PowerFlex 755 configuration while changing the catalog suffix configuration, including the CM-jumper arrangement.

2. Basic Technical Parameters

Parameter	Specification
Model / Catalog Number	20G1ABF460AN0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750 Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Input Voltage	690 VAC
Input Phase	3 Phase
Rated Current	460 A
Light-Duty Rating	500 kW
Normal-Duty Rating	450 kW
Heavy-Duty Rating	375 kW
Frame Size	Frame 8
Cooling	Forced Air
Enclosure	Type 1 / IP20
Cabinet Depth	600 mm MCC Style
Input Type	AC Input with Precharge
DC Terminals	None
EMC Filtering	EMC Filter
CM Jumper	Removed
Dynamic Braking	None
HIM	Blank / No HIM
Network	Embedded EtherNet/IP
Mounting Concept	MCC-style industrial installation
Typical Application Level	Large industrial motor control
Approx. Dimensions	About 2100 × 610 × 600 mm
Approx. Weight	About 600–650 kg
Lifecycle	Discontinued
Direct Replacement	20G1ABF460JN0NNNNN

The electrical rating and principal configuration are based on the catalog description for the 460 A Frame 8 model. The original product is specifically identified as a 690 VAC, three-phase, 460 A PowerFlex 755 with 500 kW light-duty, 450 kW normal-duty, and 375 kW heavy-duty ratings.

The dimensions and weight shown above should be treated as engineering planning values rather than certified shipping or installation dimensions. The product page confirms that dimensional drawings exist, but the exact drawing values are not exposed in the standard online product text. For final cabinet layout, lifting arrangements, foundation design, and transportation calculations, the applicable Frame 8 mechanical drawing should be used.

The large physical size and substantial mass are normal characteristics of a high-power 690 V Frame 8 drive. The 600 mm deep MCC-style configuration is particularly relevant when planning enclosure depth, front access, rear clearance, cable routing, ventilation, and maintenance space.

3. Product Description

The 20G1ABF460AN0NNNNN is a high-capacity variable-frequency AC drive from the PowerFlex 755 family.

It is designed to regulate the speed, torque, acceleration, and deceleration of large three-phase AC motors. Instead of operating a motor directly from a fixed-frequency utility supply, the drive controls motor speed by adjusting the electrical output supplied to the motor.

For industrial equipment such as large pumps, fans, conveyors, compressors, mixers, extruders, mills, process machines, and material-handling systems, this provides considerably more flexibility than a conventional across-the-line motor starter.

The 460 A rating places this model in the high-power end of the PowerFlex 755 product range. At 690 VAC, it is particularly suitable for large industrial motors where higher system voltage can help reduce current compared with an equivalent motor power rating at lower voltage.

The model is configured without a built-in local HIM. This makes it suitable for installations where the drive is expected to be operated and monitored through a control system, network, remote operator station, or an externally selected interface rather than through a permanently mounted local display.

The embedded EtherNet/IP capability is particularly useful in automation environments where the drive needs to exchange commands, speed references, status information, diagnostic information, and other control data with a higher-level control system.

4. Understanding the 460 A / 690 V Rating

The combination of 690 VAC and 460 A is one of the most important characteristics of this drive.

The PowerFlex 755 690 V platform is intended for high-power industrial applications. The published rating for this catalog number is:

• 500 kW Light Duty
• 450 kW Normal Duty
• 375 kW Heavy Duty

These ratings should not be treated as three independent motor ratings that can all be used simultaneously. They represent different operating-duty categories and allowable loading conditions.

Light-duty applications generally involve comparatively moderate overload requirements.

Normal-duty applications provide a balanced rating for many continuous industrial processes.

Heavy-duty operation is intended for applications with greater torque demand, more demanding acceleration, or higher overload requirements, resulting in the lower 375 kW heavy-duty rating.

The same 460 A power section therefore can be selected according to the actual load profile rather than simply selecting a drive based on motor nameplate horsepower or kilowatts.

5. PowerFlex 755 Series Position

The PowerFlex 755 is a high-performance member of the PowerFlex 750 Series.

The platform is intended for applications where motor control performance, communications, integration, diagnostics, and system flexibility are more important than simply providing basic variable-speed control.

The PowerFlex 755 platform is available in a wide range of voltage and current combinations, including high-power 690 V configurations. The 690 V configuration uses a dedicated high-power architecture with Frame 8 and larger frame sizes available for progressively higher power requirements.

For the specific 20G1ABF460AN0NNNNN, the relevant configuration is the 690 V / Frame 8 / 460 A class.

6. Main Functional Characteristics

6.1 High-Power Motor Control

The primary function of the drive is variable-speed control of large AC motors.

By controlling output frequency and voltage, the drive can adjust motor speed according to the requirements of the machine or process.

This can reduce mechanical stress during startup and provide smoother acceleration and deceleration than direct-on-line starting.

For large motors, this is especially valuable because starting a large motor directly from the electrical network can produce high starting current and substantial mechanical shock.

6.2 690 V Three-Phase Architecture

The 690 VAC three-phase configuration is well suited to large industrial electrical systems.

Higher voltage allows a given motor power level to be delivered with lower current than would be required at a lower voltage.

This can have practical benefits for large installations, including reduced conductor current requirements and more manageable high-power distribution arrangements.

However, 690 V systems require appropriate insulation, isolation, grounding, switching, protection, and qualified installation practices.

6.3 Embedded EtherNet/IP

The drive includes embedded EtherNet/IP functionality.

This allows the drive to become part of an industrial Ethernet control architecture without necessarily requiring a separate external network interface module.

Typical information exchanged through the control network can include:

• Start and stop commands
• Speed reference
• Actual speed
• Output frequency
• Output current
• Drive status
• Fault information
• Warning information
• Operating conditions
• Diagnostic information

This makes the drive suitable for centralized control rooms and distributed automation architectures.

6.4 Air Cooling

The drive uses forced-air cooling.

Large power semiconductors and associated electrical components generate substantial heat during operation. The cooling system moves air through the power section to maintain acceptable operating temperatures.

For installation planning, ventilation is therefore important.

The enclosure should not be installed in a location where hot exhaust air is continuously recirculated back into the drive intake.

The ventilation system should also account for dust, humidity, ambient temperature, and other environmental factors.

7. Applications

7.1 Pumps

The 20G1ABF460AN0NNNNN can be used for large industrial pumping systems.

Typical examples include:

• Water transfer pumps
• Process pumps
• Cooling-water pumps
• Industrial circulation pumps
• Large irrigation systems
• Wastewater pumping
• Mining water systems
• Desalination-related pumping

Variable-speed operation allows the pumping system to adjust output according to process requirements instead of continuously operating at maximum speed.

7.2 Fans and Blowers

Large ventilation and process-air systems are another important application.

Examples include:

• Industrial ventilation fans
• Furnace fans
• Process blowers
• Dust extraction systems
• Exhaust fans
• Cooling towers
• Air-handling systems

For centrifugal fans, reducing motor speed can substantially reduce the power required by the fan, making variable-speed control particularly useful.

7.3 Conveyors

The drive can also be used for large conveyor systems.

Typical applications include:

• Mining conveyors
• Bulk-material conveyors
• Port handling systems
• Cement plants
• Aggregate plants
• Steel-processing conveyors
• Warehouse material-handling equipment

Smooth acceleration can help reduce belt shock, product movement, and mechanical stress.

7.4 Compressors

Large compressors can require substantial motor power and careful acceleration control.

The drive can be applied where variable-speed operation is compatible with the compressor design and process requirements.

Typical applications include industrial air systems, process-gas systems, and other large rotating machinery.

7.5 Crushers and Mills

Heavy industrial equipment such as crushers and mills can impose significant torque demands on the motor.

The PowerFlex 755 platform is suitable for high-power applications where the selected duty rating matches the actual mechanical load profile.

For particularly demanding loads, the heavy-duty rating must be considered rather than selecting the drive solely from the motor’s nominal power.

7.6 Fans, Pumps, and Process Equipment

The PowerFlex 755 family is broadly applicable to industrial process equipment requiring controlled speed and torque.

This makes the 460 A model useful in large manufacturing facilities, processing plants, energy infrastructure, water treatment facilities, mining operations, and other heavy industrial installations.

8. Major Advantages

8.1 High Power Density for Industrial Systems

One of the principal advantages of this model is its ability to control very large motors using a 690 V architecture.

The 460 A rating and up to 500 kW light-duty capability make it suitable for applications where a small or medium-size drive would be completely inadequate.

8.2 Multiple Duty Ratings

The drive provides different application ratings according to duty category.

The published values are:

Duty Classification	Power Rating
Light Duty	500 kW
Normal Duty	450 kW
Heavy Duty	375 kW

This allows the same general drive platform to be evaluated against different machine load profiles.

The correct rating should always be selected based on actual motor current, overload requirements, acceleration requirements, operating cycle, and application duty.

8.3 Industrial Ethernet Integration

Embedded EtherNet/IP is a major advantage for modern automation systems.

Instead of treating the drive as an isolated motor controller, it can participate in the plant-wide automation architecture.

This makes centralized monitoring and coordinated control easier, especially when many drives are installed throughout a facility.

8.4 No-HIM Configuration

The blank-HIM configuration is useful in installations where a local display is not required.

For example, a system integrator may prefer to control the drive from a central operator interface or automation controller.

Removing an unnecessary local operator interface can also simplify the physical arrangement of the drive.

8.5 EMC Filtering

The EMC-filter configuration helps address electromagnetic compatibility requirements.

In large industrial systems containing multiple drives, motors, contactors, switching equipment, instrumentation, and communications networks, electromagnetic compatibility can be an important design consideration.

8.6 MCC-Style Installation

The 600 mm deep MCC-style construction allows the drive to be integrated into a suitable industrial motor-control lineup or electrical room arrangement.

This can be advantageous for large facilities where drives are grouped with other motor-control equipment.

9. Input and Power Architecture

The catalog configuration uses AC input with precharge and no DC terminals.

Precharge is important in high-power drives because the DC-link capacitors cannot simply be connected to the AC supply without controlling the initial charging current.

The precharge function helps manage this startup condition.

The lack of external DC terminals also means that the drive should be considered as the specified AC-input configuration rather than automatically assuming that it can be integrated into a common DC bus system.

Any common-bus or DC-bus application requires verification of the exact drive configuration and compatible accessories.

10. Dynamic Braking

The 20G1ABF460AN0NNNNN is specified with no dynamic braking.

This is important when evaluating applications with large inertial loads or frequent deceleration.

If the motor and mechanical system require rapid stopping, regenerated energy may need to be managed through an appropriate braking architecture.

For applications involving large rotating masses, rapid deceleration, high stopping frequency, or four-quadrant operation, braking requirements should be evaluated during system design rather than after the drive has been selected.

11. HIM and Operator Interface

This particular catalog number is configured as:

Blank — No HIM

This means the drive does not include a standard local Human Interface Module as part of this catalog configuration.

The absence of a HIM does not mean that the drive lacks control capability.

Instead, the installation can be designed around network control, external control hardware, remote operator stations, or a separately selected interface.

This configuration is particularly appropriate for large centralized automation systems where the drive cabinet is located in an electrical room and operators interact with the process through a plant HMI or supervisory control system.

12. Installation Considerations

Because this is a high-power 690 V Frame 8 drive, installation planning should be considerably more thorough than for a small general-purpose VFD.

Important considerations include:

• Input protection
• Motor protection
• Grounding
• Cable routing
• EMC practices
• Cabinet ventilation
• Ambient temperature
• Motor cable length
• Output switching arrangements
• Maintenance access
• Safe isolation
• Heat dissipation
• Lifting and transportation
• Control-network wiring
• Commissioning access

The physical dimensions and mass of a Frame 8 unit also mean that mechanical handling should be considered before installation.

The approximate dimensional value of 2100 × 610 × 600 mm and approximate mass of 600–650 kg should be treated as planning information only. Exact mechanical dimensions, mounting points, lifting requirements, and shipping weight should be confirmed against the applicable mechanical drawing for the specific unit.

13. Maintenance Considerations

Large air-cooled drives should be maintained as part of a planned electrical maintenance program.

The cooling system deserves particular attention.

Dust accumulation can reduce airflow and increase operating temperature. Fan condition should therefore be monitored, particularly in dusty industrial environments.

Recommended maintenance areas include:

• Cooling fans
• Air passages
• Electrical connections
• Power terminals
• Control wiring
• Grounding connections
• Network connections
• Cabinet ventilation
• Environmental contamination
• Drive fault history
• Motor insulation condition
• External cooling conditions

A clean and properly ventilated installation can significantly improve the operating environment for a high-power drive.

14. Recommended Related Models — PowerFlex 755 690 V Family

The following models are useful comparison choices around the same PowerFlex 755 690 V platform. Some are direct rating alternatives, while others differ in interface configuration or current rating.

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	Cooling	HIM / Interface	Enclosure
20G1ABF415AN0NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8	Air	No HIM	Type 1 / IP20, 600 mm
20G1ABF460AN0NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	8	Air	No HIM	Type 1 / IP20, 600 mm
20G1ABF500AN0NNNNN	690 VAC	500 A	530 kW	500 kW	400 kW	8	Air	No HIM	Type 1 / IP20, 600 mm
20G1ABF460JN0NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	8	Air	No HIM	Type 1 / IP20, 600 mm
20G1ABF460JN4NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	8	Air	Door/local HIM	Type 1 / IP20, 600 mm

The 415 A, 460 A, and 500 A versions provide a useful progression when selecting a drive around the same power range. The 460 A version is therefore not an isolated configuration; it sits between the 415 A and 500 A power levels within the 690 V Frame 8 family.

The 20G1ABF460JN0NNNNN is particularly important because it is the documented direct replacement for the original 20G1ABF460AN0NNNNN. Its published specification remains 460 A, 690 VAC, 500 kW LD, 450 kW ND, 375 kW HD, Frame 8, air cooled, 600 mm MCC style, with no HIM.

15. Comparison of the Recommended 690 V Models

15.1 20G1ABF415AN0NNNNN

This is a lower-current alternative within the same general configuration.

At 415 A, it provides 450 kW light-duty, 400 kW normal-duty, and 355 kW heavy-duty capability.

It is appropriate when the motor and process load do not require the additional current capacity of the 460 A model.

15.2 20G1ABF460AN0NNNNN

This is the subject model.

Its 460 A rating provides a useful balance between the 415 A and 500 A Frame 8 configurations.

The 450 kW normal-duty rating is particularly significant for large continuous industrial processes.

15.3 20G1ABF500AN0NNNNN

The 500 A model provides greater current capacity.

Its published ratings reach 530 kW light duty, 500 kW normal duty, and 400 kW heavy duty.

It should be considered when the motor current, overload requirement, or process demand exceeds the practical capability of the 460 A model.

15.4 20G1ABF460JN0NNNNN

This is the most important replacement option.

It retains the same 460 A electrical class and principal Frame 8 / 690 V architecture.

For replacement projects, this model deserves priority consideration because it is explicitly identified as the direct replacement for the discontinued 20G1ABF460AN0NNNNN.

15.5 20G1ABF460JN4NNNNN

This version is useful when a local operator interface is required.

The electrical rating is in the same 460 A / 690 V class, but the configuration includes a local HIM arrangement.

This can be preferable for installations where technicians need convenient local access to parameters, diagnostics, and drive status.

16. Five Same-Brand Comparison Models

The following are useful Allen-Bradley models for comparison when selecting a drive for a new system or evaluating alternatives to the PowerFlex 755.

Model	Product Family	Typical Voltage Class	Current / Power Class	Main Use	Cooling	Interface
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	General industrial motor control	Air	Integrated control / network options
25C-D030N114	PowerFlex 523	480 VAC class	30 A class	Compact machine applications	Air	Compact drive architecture
20G1ABC302JN4NNNNN	PowerFlex 755	480 VAC class	302 A class	Large industrial motors	Air	Local HIM configuration
20G1ABC460JN4NNNNN	PowerFlex 755	480 VAC class	460 A class	High-power industrial drives	Air	Local HIM configuration
20G1ABC650JN4NNNNN	PowerFlex 755	480 VAC class	650 A class	Very high-power industrial applications	Air	Local HIM configuration

These five models are not direct electrical replacements for the 690 V / 460 A model. They are better understood as same-brand comparison products representing different PowerFlex families, voltage classes, current capacities, and application levels.

For a 690 V high-power motor, the 20G1ABF family remains the more relevant comparison group than the smaller PowerFlex 523 or PowerFlex 525 families.

17. Practical Model Selection Guide

Application Requirement	Recommended Direction
Around 400 kW motor at 690 V	Consider 415 A class
Around 450 kW motor at 690 V	Consider 460 A class
Around 500 kW motor at 690 V	Consider 500 A class
Existing 20G1ABF460AN0NNNNN replacement	20G1ABF460JN0NNNNN
Local drive display required	Consider JN2 / JN4 configurations
No local HIM required	Consider JN0 configuration
Heavy-duty application	Check HD current and kW rating carefully
High-inertia rapid stopping	Evaluate braking architecture
Network-based automation	EtherNet/IP configuration is advantageous
MCC-style installation	600 mm or 800 mm cabinet configuration should be selected according to the installation

The most important selection criterion should not simply be motor horsepower.

The actual motor full-load current, overload requirement, duty cycle, acceleration profile, ambient conditions, motor characteristics, braking requirements, and installation environment should all be considered.

18. Important Difference Between LD, ND, and HD

The three power ratings are particularly important for this model.

Light Duty — 500 kW

The 500 kW rating is the highest published power rating for this configuration.

It is suitable for applications whose overload and thermal requirements fit the light-duty classification.

Normal Duty — 450 kW

The 450 kW normal-duty rating provides a balanced selection point for many large industrial processes.

For a continuously operating 450 kW-class motor, this rating may be the most relevant starting point, subject to verification of the actual motor current and application duty.

Heavy Duty — 375 kW

The heavy-duty rating is lower because heavy-duty operation generally involves more severe overload or torque requirements.

For applications such as crushers, heavily loaded conveyors, and other equipment with demanding starting or acceleration characteristics, the heavy-duty rating should receive particular attention.

A 450 kW motor should not automatically be connected to the drive simply because the drive has a 500 kW light-duty rating. The actual operating duty must be checked against the appropriate rating category.

19. Product Advantages at a Glance

Advantage	Description
High Voltage	690 VAC three-phase architecture for large industrial systems
High Current	460 A continuous-class power section
High Power	Up to 500 kW light-duty rating
Flexible Duty Selection	LD, ND, and HD ratings
EtherNet/IP	Convenient integration into industrial automation
Frame 8	Large industrial power platform
Air Cooling	Forced-air cooling for high-power operation
EMC Filtering	Helps support electromagnetic compatibility
MCC Construction	600 mm deep MCC-style configuration
No-HIM Option	Suitable for centralized or remote control architectures
Precharge Input	Designed for controlled DC-link charging
PowerFlex 755 Platform	Suitable for demanding industrial motor-control systems
Replacement Path	Direct replacement available through the 20G1ABF460JN0NNNNN configuration

20. Overall Engineering Assessment

The Allen-Bradley 20G1ABF460AN0NNNNN is a high-power, 690 VAC, three-phase PowerFlex 755 AC drive designed for large industrial motor-control applications.

Its 460 A Frame 8 power section places it firmly in the large-drive category. With published ratings of 500 kW LD, 450 kW ND, and 375 kW HD, it can cover a broad range of large motor applications when the correct duty classification is selected.

The combination of 690 VAC input, forced-air cooling, 600 mm MCC-style construction, EMC filtering, precharged AC input, no DC terminals, embedded EtherNet/IP, and no local HIM makes the configuration particularly appropriate for large centralized industrial automation systems.

The model’s main strengths are its high-power capability, industrial Ethernet integration, multiple duty classifications, and compatibility with large-scale automation architectures.

The most important consideration today is lifecycle status. The original 20G1ABF460AN0NNNNN is discontinued, and the documented direct replacement is 20G1ABF460JN0NNNNN. Therefore, for a new project, replacement project, or long-term spare-parts strategy, the JN0 version should normally be evaluated first.

For an existing installation, however, the original catalog number remains important because it identifies the exact historical configuration of the installed drive. When replacing it, the electrical rating alone should not be used as the only criterion; enclosure style, HIM configuration, CM-jumper configuration, braking requirements, network architecture, control wiring, firmware compatibility, motor data, and installation conditions should also be checked.

In practical terms, 20G1ABF460AN0NNNNN can be regarded as a large industrial 690 V PowerFlex 755 drive for applications where conventional low-power VFDs are insufficient. Its 460 A rating and Frame 8 construction make it appropriate for major motor-driven equipment in process plants, water systems, mining, material handling, manufacturing, pumping, ventilation, and other heavy industrial environments.

For mechanical planning, the approximate 2100 × 610 × 600 mm envelope and 600–650 kg estimated mass can be used as preliminary values only. Final engineering should use the applicable dimensional and installation drawings because cabinet configuration, accessories, mounting arrangement, and exact product revision can affect the final physical requirements.

In short: the 20G1ABF460AN0NNNNN is a 690 VAC, 460 A, Frame 8, air-cooled PowerFlex 755 AC drive with 500 kW LD / 450 kW ND / 375 kW HD capability, embedded EtherNet/IP, EMC filtering, precharged AC input, no DC terminals, and no standard HIM. It is a high-capacity industrial drive intended for large motor-control systems rather than small machine applications.