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Allen-Bradley 20G1AJF460JN4NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1AJF460JN4NNNNN is a high-capacity industrial AC variable-frequency drive belonging to the PowerFlex 755 family.

It is designed for large three-phase motors and demanding industrial applications where substantial motor power, centralized automation, network communication, protected cabinet construction, and local operator access are required.

The drive is rated for the 690 VAC three-phase voltage class and has a nominal output-current rating of 460 A.

Its principal motor-duty ratings are approximately:

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

This makes the drive suitable for a wide range of large industrial equipment, including pumps, fans, blowers, conveyors, material-handling systems, mining equipment, cement equipment, water systems, process machinery, and other high-power motor applications.

The JN4 configuration is especially useful when the installation requires an enhanced local operator interface in addition to network-based control.

The configuration includes an Enhanced LCD, Full Numeric, IP66 / NEMA Type 4X/12 HIM, allowing operators and maintenance personnel to access drive information directly at the cabinet.

The drive also incorporates embedded EtherNet/IP, allowing it to be integrated into a modern industrial automation network.

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2. Brand and Product Series

Category	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 750-Series
Drive Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Catalog Number	20G1AJF460JN4NNNNN
Configuration	JN4
Voltage Class	690 VAC
Phase	Three Phase
Nominal Current	460 A
Light-Duty Rating	500 kW
Normal-Duty Rating	450 kW
Heavy-Duty Rating	375 kW
Frame	8
Cooling	Forced Air
Enclosure	IP54 / Type 12
Cabinet Style	MCC Style
Cabinet Depth Class	800 mm
Input Type	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD / Full Numeric
HIM Protection	IP66 / NEMA Type 4X/12

The specified JN4 configuration is identified as a PowerFlex 755 AC Drive with embedded Ethernet/IP, forced-air cooling, AC input with precharge, no DC terminals, Type 12 / IP54 800 mm deep MCC-style construction, 460 A current capacity, 500 kW Light Duty, 450 kW Normal Duty, 375 kW Heavy Duty, 690 VAC three-phase operation, filtered input, CM jumper installed, no dynamic braking, and an enhanced LCD/full-numeric IP66 / NEMA Type 4X/12 HIM.

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3. Main Technical Parameters

Parameter	Specification
Catalog Number	20G1AJF460JN4NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 750-Series
Drive Model	PowerFlex 755
Drive Type	Air-Cooled AC Drive
Voltage Rating	690 VAC
Input Phase	Three Phase
Nominal Output Current	460 A
Light-Duty Motor Rating	500 kW
Normal-Duty Motor Rating	450 kW
Heavy-Duty Motor Rating	375 kW
Light-Duty Continuous Current	500 A
Light-Duty 1-Minute Current	550 A
Normal-Duty Continuous Current	460 A
Normal-Duty 1-Minute Current	506 A
Normal-Duty 3-Second Current	690 A
Heavy-Duty Continuous Current	375 A
Heavy-Duty 1-Minute Current	563 A
Heavy-Duty 3-Second Current	675 A
Input Type	AC Input with Precharge
DC Terminals	None
Cooling Method	Forced Air
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD / Full Numeric
HIM Enclosure Rating	IP66 / NEMA Type 4X/12
Drive Enclosure	IP54 / Type 12
Cabinet Style	MCC Style
Frame Size	Frame 8
Nominal Cabinet Depth	800 mm
Approx. Height	2477 mm
Approx. Width	600 mm
Approx. Basic Depth	800 mm
Approx. Depth with Filter Arrangement	898 mm
Approx. Weight	644 kg
Installation	Floor-Mounted Industrial / MCC-Style

The 460 A, 690 V configuration provides 500 kW Light-Duty, 450 kW Normal-Duty, and 375 kW Heavy-Duty capability. The product configuration is Frame 8 and uses an 800 mm deep Type 12 / IP54 MCC-style arrangement.

The dimensions and weight shown above should be treated as an approximate Frame 8 cabinet reference. The final mechanical dimensions can vary with cabinet options, accessories, and the complete project configuration. The project-specific dimensional drawing should be used for final installation and transportation planning.

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4. Product Identification

The catalog number 20G1AJF460JN4NNNNN represents a specific high-power configuration within the PowerFlex 755 family.

The major characteristics of the configuration can be summarized as follows:

• PowerFlex 755 AC Drive.
• 690 VAC three-phase operation.
• 460 A nominal current class.
• 500 kW Light-Duty rating.
• 450 kW Normal-Duty rating.
• 375 kW Heavy-Duty rating.
• Frame 8.
• Forced-air cooling.
• IP54 / Type 12 enclosure.
• 800 mm deep MCC-style cabinet.
• Embedded EtherNet/IP.
• AC input with precharge.
• No DC terminals.
• Filtered configuration.
• CM jumper installed.
• No dynamic braking.
• Enhanced LCD / Full Numeric HIM.
• IP66 / NEMA Type 4X/12 HIM protection.

The most important distinction between this model and the corresponding JN0 configuration is the local operator interface.

The 20G1AJF460JN0NNNNN is the No-HIM configuration, while the 20G1AJF460JN4NNNNN provides the enhanced local HIM.

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5. Product Series: PowerFlex 755

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

It is intended for applications requiring more capacity and flexibility than compact machine-level variable-frequency drives.

The series is suitable for large industrial motors and provides a wide range of configurations covering different voltage classes, current ratings, enclosure arrangements, communication options, braking configurations, and operator interfaces.

The 20G1AJF460JN4NNNNN represents the 690 VAC / 460 A / Frame 8 portion of the PowerFlex 755 range.

The same family includes lower and higher current configurations, allowing engineers to select a drive according to actual motor current and load duty rather than selecting an oversized or undersized drive simply by nominal motor power.

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6. Electrical Rating

The drive operates at the 690 VAC three-phase voltage level.

This voltage class is commonly associated with large industrial motor systems.

For a given motor power, a higher motor voltage allows the required operating current to be reduced compared with a lower-voltage motor system.

This can be advantageous for large motors and industrial power distribution systems.

The 690 VAC configuration is particularly relevant to:

• Large pumps.
• Large fans.
• Mining equipment.
• Cement equipment.
• Industrial ventilation.
• Material handling.
• Process equipment.
• Water infrastructure.
• Heavy industrial production.

The 460 A current rating provides a substantial amount of capacity for large motors.

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7. Duty Ratings

The drive has three primary duty categories.

Duty Category	Continuous Current	1-Minute Current	3-Second Current	Motor Rating
Light Duty	500 A	550 A	—	500 kW
Normal Duty	460 A	506 A	690 A	450 kW
Heavy Duty	375 A	563 A	675 A	375 kW

These ratings are important because the correct drive selection depends on the actual motor current and application duty.

The motor’s kW rating alone should not be used as the only selection criterion.

The following factors should also be evaluated:

• Continuous motor current.
• Starting torque.
• Load inertia.
• Acceleration time.
• Deceleration time.
• Overload requirements.
• Operating cycle.
• Regenerative energy.
• Ambient conditions.

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8. Light-Duty Operation

The 500 kW Light-Duty rating is particularly useful for large variable-torque loads.

Typical applications include:

• Large centrifugal pumps.
• Large centrifugal fans.
• Cooling-water pumps.
• Ventilation fans.
• Process blowers.
• Industrial air systems.
• Utility pumping systems.

Large variable-torque applications often do not require the same overload capability as high-torque machinery.

This allows the drive to provide a high motor-power rating under the Light-Duty classification.

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9. Normal-Duty Operation

The 450 kW Normal-Duty rating is intended for general industrial machinery.

Typical applications include:

• Large conveyors.
• Process pumps.
• Blowers.
• Material-handling systems.
• Industrial fans.
• Process equipment.
• General production machinery.

The Normal-Duty rating is often appropriate where the motor experiences moderate load variation and occasional overload requirements.

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10. Heavy-Duty Operation

The 375 kW Heavy-Duty rating provides a more conservative power selection for applications with greater torque and overload requirements.

Typical applications may include:

• Heavy conveyors.
• Mixers.
• High-inertia machines.
• Certain crushers.
• Material-processing equipment.
• Heavy-duty production machinery.

The Heavy-Duty rating should be considered carefully when the motor experiences repeated acceleration, high starting torque, or substantial cyclic loads.

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11. Enhanced LCD / Full Numeric HIM

One of the most important characteristics of the JN4 configuration is its Enhanced LCD / Full Numeric HIM.

HIM means Human Interface Module.

Unlike a No-HIM configuration, the JN4 version provides a dedicated local operator interface.

This is particularly useful for:

• Commissioning.
• Parameter adjustment.
• Local diagnostics.
• Fault investigation.
• Maintenance.
• Manual operation.
• Local status monitoring.

The enhanced operator interface provides technicians with a direct way to interact with the drive at the cabinet.

This can be valuable during commissioning because technicians can inspect parameters and drive status without depending entirely on a remote control system.

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12. HIM Environmental Protection

The HIM is specified with IP66 / NEMA Type 4X/12 protection.

This provides a significantly more protected local operator interface than a basic unprotected keypad.

The protected interface is useful in industrial environments where the drive cabinet may be exposed to dust, moisture, or industrial contamination.

However, the HIM protection should not be confused with the overall cabinet rating.

The drive itself uses an IP54 / Type 12 cabinet configuration, while the HIM has its own higher protection specification.

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13. Local and Remote Control

The JN4 configuration provides flexibility for both local and centralized operation.

A typical architecture can be arranged as:

PLC / DCS / SCADA

↓

EtherNet/IP

↓

PowerFlex 755

and simultaneously:

Local HIM

↓

Drive Control / Diagnostics

This gives maintenance personnel local access while allowing the production-control system to manage the drive during normal plant operation.

This dual-access approach is particularly useful for large industrial plants.

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14. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP.

This provides an integrated communication path between the drive and the industrial control system.

The network can be used for:

• Start commands.
• Stop commands.
• Speed references.
• Frequency references.
• Drive status.
• Motor current.
• Output frequency.
• Fault information.
• Alarm information.
• Diagnostic information.
• Parameter access.
• Operating data.

A typical system can therefore be organized as:

Process Instrumentation → PLC → EtherNet/IP → PowerFlex 755 → Motor

This architecture is particularly useful for automated pumping, ventilation, material handling, and process systems.

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15. Centralized Automation

The embedded network capability makes the drive suitable for centralized automation.

For example, in a large water facility, a PLC can monitor pressure and flow.

The PLC can calculate a required motor speed.

The speed command can then be sent to the PowerFlex 755 through EtherNet/IP.

The drive regulates motor speed accordingly.

The local HIM remains available for maintenance and commissioning.

This combination provides both:

Centralized process control

and

Local maintenance access

which is one of the practical advantages of the JN4 configuration.

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16. Input Configuration

The model uses AC input with precharge.

The precharge arrangement controls the initial charging of the drive’s internal DC-link capacitors when power is applied.

This is particularly important for high-power drives because the internal energy-storage components are substantial.

The specified configuration does not provide external DC terminals.

Therefore, this is a conventional AC-input arrangement rather than a common-DC-bus configuration.

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17. No DC Terminals

The absence of DC terminals simplifies the configuration for conventional AC-input applications.

Typical applications include:

• Pumps.
• Fans.
• Blowers.
• Conveyors.
• Process machinery.
• Industrial utility systems.

For specialized systems requiring a shared DC bus or external DC supply, a different configuration should be evaluated.

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18. Filtered Configuration

The drive is configured as Filtered.

Input filtering helps manage electrical noise associated with high-frequency switching.

In a large industrial installation, filtering works together with:

• Grounding.
• Shielding.
• Cable routing.
• Motor cable construction.
• Cabinet layout.
• Control wiring separation.
• Proper earthing.
• Motor installation practices.

Therefore, overall EMC performance depends on the complete installation rather than the filter alone.

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19. CM Jumper Installed

The model has the CM jumper installed configuration.

Common-mode configuration should be considered as part of the complete electrical design.

Relevant factors include:

• Power-system grounding.
• Motor cable type.
• Cable length.
• Motor insulation.
• EMC requirements.
• Leakage current.
• Grounding arrangement.
• Plant electrical architecture.

The correct configuration should be confirmed during system engineering.

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20. Dynamic Braking

The 20G1AJF460JN4NNNNN is specified with no dynamic braking.

This is an important consideration when the load has substantial inertia or requires rapid deceleration.

When a motor decelerates, mechanical energy can be transferred back into the drive’s DC bus.

If this energy is excessive, DC-bus voltage can increase.

Applications requiring rapid deceleration should therefore be evaluated for:

• Motor inertia.
• Load inertia.
• Deceleration time.
• Motor speed.
• Regenerative energy.
• Braking requirements.
• External braking arrangements.
• Regenerative solutions.

For large centrifugal pumps and fans, controlled deceleration is generally easier to manage.

For high-inertia machinery, braking requirements should be carefully evaluated before final drive selection.

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21. Forced-Air Cooling

The drive uses forced-air cooling.

At a 460 A power level, the drive’s power electronics generate considerable heat.

The cooling system moves air through the power section to remove this heat.

The installation therefore requires:

• Adequate ventilation.
• Appropriate ambient temperature.
• Sufficient airflow.
• Clear air passages.
• Proper cabinet clearance.
• Maintenance access.

The total heat generated by all drives in the electrical room should be considered when designing the room’s HVAC system.

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22. Frame 8 Construction

The drive uses Frame 8 construction.

Frame 8 is intended for large industrial drives.

Compared with compact drives, the Frame 8 arrangement requires substantially more floor space and handling capacity.

Important installation considerations include:

• Cabinet height.
• Floor loading.
• Transportation route.
• Door clearance.
• Lifting equipment.
• Maintenance access.
• Ventilation.
• Cable entry.
• Working clearance.

The large mechanical size is a normal characteristic of this high-power drive class.

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23. Enclosure Construction

The drive uses a Type 12 / IP54, 800 mm deep MCC-style enclosure.

This is a protected cabinet configuration intended for appropriate industrial environments.

Potential installation locations include:

• Electrical rooms.
• MCC rooms.
• Process plants.
• Manufacturing plants.
• Water-treatment facilities.
• Cement plants.
• Mining facilities.
• Industrial utility buildings.

The enclosure provides a substantially more protected arrangement than an open-frame installation.

Nevertheless, environmental conditions still need to be considered.

Important factors include:

• Ambient temperature.
• Humidity.
• Condensation.
• Dust.
• Corrosive gases.
• Altitude.
• Ventilation.

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24. Approximate Dimensions and Weight

The following table provides the typical Frame 8 mechanical reference requested for project planning.

Mechanical Parameter	Approximate Value
Model	20G1AJF460JN4NNNNN
Frame	8
Height	2477 mm
Width	600 mm
Basic Depth	800 mm
Approx. Depth with Filter Arrangement	898 mm
Approx. Weight	644 kg
Drive Enclosure	IP54
Enclosure Type	Type 12
Cabinet Style	MCC Style
Cooling	Forced Air

These figures should be considered approximate Frame 8 reference values, not a substitute for the dimensional drawing of the final configured assembly.

Additional option cabinets can increase both overall width and weight.

For transportation and installation, the final project-specific drawing should always be treated as the controlling mechanical reference.

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25. Large Pump Applications

The 20G1AJF460JN4NNNNN is particularly well suited to large pump applications.

Potential applications include:

• Raw-water pumping.
• High-lift pumping.
• Cooling-water pumping.
• Process-water pumping.
• Industrial circulation.
• Mine dewatering.
• Utility pumping.
• Large transfer pumps.

Variable-speed control can allow the pump to match actual process requirements.

For example:

Pressure Transmitter → PLC → EtherNet/IP → PowerFlex 755 → Pump Motor

This arrangement can provide automatic pressure control without requiring the motor to operate continuously at full speed.

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26. Large Fan Applications

Large centrifugal fans are another strong application.

Potential applications include:

• Furnace fans.
• Exhaust fans.
• Combustion-air fans.
• Dust-collection systems.
• Mine ventilation.
• Cement-process fans.
• Industrial ventilation.
• Large process blowers.

The 500 kW Light-Duty capability makes the drive particularly attractive for large variable-torque fan systems.

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27. Blower Applications

The drive can control large industrial blowers used for:

• Process air.
• Aeration.
• Combustion air.
• Ventilation.
• Pneumatic systems.
• Dust collection.
• Industrial process gas.

Blower applications should be evaluated according to actual motor current and torque requirements.

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28. Conveyor Applications

Large conveyors can require substantial motor power, particularly in mining, cement, aggregate, port, and bulk-material applications.

The drive can provide controlled acceleration and deceleration.

This can reduce mechanical stress on:

• Conveyor belts.
• Gearboxes.
• Couplings.
• Bearings.
• Drive pulleys.
• Mechanical structures.

The 450 kW Normal-Duty rating provides a substantial capacity for large conveyor systems.

For conveyors with extremely high inertia or frequent regenerative operation, braking requirements should be evaluated separately.

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29. Mining Applications

Mining operations often use very large motors.

Potential applications include:

• Mine ventilation.
• Dewatering.
• Ore conveyors.
• Material handling.
• Crushing.
• Processing.
• Large fans.
• Auxiliary equipment.

The 690 VAC electrical configuration is well suited to many large mining motor systems.

The IP54 / Type 12 cabinet configuration can be appropriate for controlled electrical-room installations.

Outdoor or highly contaminated environments require additional environmental evaluation.

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30. Cement Industry Applications

Potential cement and aggregate applications include:

• Large process fans.
• Dust collectors.
• Material conveyors.
• Large pumps.
• Blowers.
• Crushers.
• Material handling.
• Utility equipment.

The drive’s high power rating makes it suitable for the large motors commonly found in these plants.

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31. Steel and Metal Processing Applications

Potential applications include:

• Cooling-water pumps.
• Large exhaust fans.
• Material-handling systems.
• Process conveyors.
• Production equipment.
• Utility systems.
• Auxiliary machinery.

The drive can be integrated into the plant’s automation architecture using EtherNet/IP.

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32. Water and Wastewater Applications

The drive can be used for high-power water systems such as:

• Raw-water pumps.
• High-lift pumps.
• Transfer pumps.
• Industrial wastewater pumps.
• Aeration blowers.
• Cooling-water systems.
• Process-water circulation.

The drive can regulate motor speed according to process feedback such as:

• Flow.
• Pressure.
• Tank level.
• System demand.

This makes it suitable for automated pumping systems.

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33. Process Industry Applications

The PowerFlex 755 architecture is also suitable for many large process applications.

Potential industries include:

• Pulp and paper.
• Mineral processing.
• Cement.
• Steel.
• Water treatment.
• General manufacturing.
• Chemical processing.
• Industrial utilities.
• Bulk-material handling.
• Mining.

The final application suitability should always be checked against motor current, load torque, overload characteristics, speed range, braking requirements, and environmental conditions.

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34. Major Product Advantages

High-Power 690 VAC Operation

The 690 VAC configuration is designed for large industrial motors.

The higher motor voltage allows high motor power to be transmitted with lower current than would be required at lower voltage levels.

This can be useful for large motor feeders and industrial power distribution.

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460 A Current Class

The 460 A rating provides a substantial operating range.

It sits above the 415 A model and below the 500 A configuration in the same general 690 V PowerFlex 755 range.

This provides a useful selection point for large motors.

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500 kW Light-Duty Capability

The 500 kW Light-Duty rating is especially useful for large variable-torque loads.

It provides significant capacity for centrifugal pumps, fans, blowers, and ventilation systems.

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450 kW Normal-Duty Capability

The 450 kW Normal-Duty rating provides a strong general-purpose selection point for large industrial equipment.

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375 kW Heavy-Duty Capability

The 375 kW Heavy-Duty rating provides additional flexibility for high-torque or high-overload applications.

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Enhanced Local Operator Interface

The JN4 configuration has an enhanced LCD / full-numeric HIM.

This is a major practical difference from the JN0 configuration.

It provides local access for:

• Commissioning.
• Troubleshooting.
• Parameter adjustment.
• Status monitoring.
• Fault investigation.
• Maintenance.

---

IP66 / NEMA Type 4X/12 HIM

The protected HIM is particularly useful for industrial environments where local operator access is required.

It provides a more robust local interface than an unprotected keypad arrangement.

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Embedded EtherNet/IP

Embedded EtherNet/IP simplifies integration into a plant automation network.

The drive can exchange control and diagnostic information with PLC, DCS, SCADA, and HMI systems.

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IP54 / Type 12 Cabinet

The protected cabinet is suitable for many industrial electrical-room installations.

It provides a more enclosed solution than open-frame drive construction.

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Flexible Local and Remote Control

The combination of EtherNet/IP and local HIM provides both centralized automation and local maintenance access.

This is one of the strongest practical features of the JN4 configuration.

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35. JN4 Versus JN0

The closest directly related configuration is 20G1AJF460JN0NNNNN.

Parameter	20G1AJF460JN0NNNNN	20G1AJF460JN4NNNNN
Voltage	690 VAC	690 VAC
Current	460 A	460 A
Light Duty	500 kW	500 kW
Normal Duty	450 kW	450 kW
Heavy Duty	375 kW	375 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
EtherNet/IP	Embedded	Embedded
Input	AC with Precharge	AC with Precharge
DC Terminals	None	None
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed
Dynamic Braking	None	None
HIM	Blank / No HIM	Enhanced LCD / Full Numeric
HIM Protection	—	IP66 / NEMA Type 4X/12
Best Use	Centralized Control	Local + Centralized Control

The two models have essentially the same primary power rating.

The main practical difference is the operator interface.

For an installation where technicians require direct local access, the JN4 version is the more appropriate configuration.

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36. Comparison with the 415 A Configuration

The 415 A model is a close lower-capacity alternative.

Parameter	20G1AJF415JN4NNNNN	20G1AJF460JN4NNNNN
Voltage	690 VAC	690 VAC
Current	415 A	460 A
Light Duty	450 kW	500 kW
Normal Duty	400 kW	450 kW
Heavy Duty	355 kW	375 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
EtherNet/IP	Embedded	Embedded
Local HIM	Enhanced	Enhanced
Dynamic Braking	None	None

The 460 A configuration provides additional current and Light-Duty / Normal-Duty capacity.

It is appropriate when the motor current exceeds the practical selection range of the 415 A version.

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37. Comparison with the 500 A Configuration

The next higher current configuration is 20G1AJF500JN4NNNNN.

Parameter	20G1AJF460JN4NNNNN	20G1AJF500JN4NNNNN
Voltage	690 VAC	690 VAC
Current	460 A	500 A
Light Duty	500 kW	530 kW
Normal Duty	450 kW	500 kW
Heavy Duty	375 kW	400 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
EtherNet/IP	Embedded	Embedded
Local HIM	Enhanced	Enhanced
Dynamic Braking	None	None

The 500 A configuration can be considered when the motor current or process duty exceeds the capability of the 460 A configuration.

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38. Five Recommended Related Models

The following five models are useful related choices within the same PowerFlex 755 family.

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	HIM
20G1AJF330JN4NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	8	Enhanced
20G1AJF370JN4NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	8	Enhanced
20G1AJF415JN4NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8	Enhanced
20G1AJF500JN4NNNNN	690 VAC	500 A	530 kW	500 kW	400 kW	8	Enhanced
20G1AJF460JN0NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	8	No HIM

These models provide a practical progression around the target 460 A configuration.

The first four are particularly useful when a consistent local-HIM architecture is required.

The JN0 version is useful when the same electrical rating is needed but a local HIM is not required.

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39. Detailed Comparison of Related 690 V Models

Model	Current	LD Current	ND Current	HD Current	LD Power	ND Power	HD Power
20G1AJF330JN4NNNNN	330 A	370 A	330 A	265 A	355 kW	315 kW	250 kW
20G1AJF370JN4NNNNN	370 A	410 A	370 A	308 A	400 kW	355 kW	300 kW
20G1AJF415JN4NNNNN	415 A	460 A	415 A	370 A	450 kW	400 kW	355 kW
20G1AJF460JN4NNNNN	460 A	500 A	460 A	375 A	500 kW	450 kW	375 kW
20G1AJF500JN4NNNNN	500 A	530 A	500 A	413 A	530 kW	500 kW	400 kW

The selection sequence gives engineers a practical way to match the drive to the actual motor current and duty profile.

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40. Five Popular Allen-Bradley Models

For a broader selection beyond the immediate 690 V PowerFlex 755 family, the following five models represent useful and popular configurations from the same brand.

Model	Series	Voltage	Current / Capacity	Motor Rating	Frame	Protection	Typical Application
25B-D030N114	PowerFlex 525	380–480 VAC	30 A	Approx. 15 kW ND / 11 kW HD	D	IP20	General machine control
25C-D030N114	PowerFlex 527	380–480 VAC	30 A	Approx. 15 kW ND / 11 kW HD	D	IP20	Networked machine control
20F1AND302JA0NNNNN	PowerFlex 753	480 VAC	302 A	Approx. 250 HP ND / 200 HP HD	7	IP20/IP00	Large industrial equipment
20G1AJE460JN4NNNNN	PowerFlex 755	600 VAC	460 A	500 HP LD / 500 HP ND / 400 HP HD	8	IP54	Large industrial motors
20G1AJF415JN4NNNNN	PowerFlex 755	690 VAC	415 A	450 kW LD / 400 kW ND / 355 kW HD	8	IP54	Large process equipment

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41. Popular Model – 25B-D030N114

The 25B-D030N114 belongs to the PowerFlex 525 family.

It is designed for substantially smaller motor applications than the 460 A PowerFlex 755.

Typical applications include:

• Small pumps.
• Small fans.
• Conveyors.
• Packaging equipment.
• Machine tools.
• General-purpose machinery.

Its compact construction makes it more appropriate for machine-level installations.

It should not be considered a direct electrical substitute for the 20G1AJF460JN4NNNNN.

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42. Popular Model – 25C-D030N114

The 25C-D030N114 belongs to the PowerFlex 527 family.

It is aimed at networked machine-control applications.

Potential applications include:

• Packaging machinery.
• Conveyors.
• Material handling.
• Machine automation.
• Production equipment.
• Small process machinery.

It provides a significantly lower power range than the target Frame 8 drive.

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43. Popular Model – 20F1AND302JA0NNNNN

The 20F1AND302JA0NNNNN belongs to the PowerFlex 753 family.

It operates in the 480 VAC class and has approximately 302 A output capability.

Typical applications include:

• Large pumps.
• Large fans.
• Conveyors.
• Process equipment.
• Material handling.
• Industrial utility systems.

It is a useful alternative when the plant’s electrical distribution is based on 480 VAC rather than 690 VAC.

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44. Popular Model – 20G1AJE460JN4NNNNN

The 20G1AJE460JN4NNNNN is another high-power PowerFlex 755 configuration.

It uses a 600 VAC voltage class and approximately 460 A current capacity.

It shares the general Frame 8 / IP54 industrial architecture of the target model.

The key difference is the voltage class.

This makes it suitable for large industrial facilities using 600 VAC motor systems rather than 690 VAC systems.

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45. Popular Model – 20G1AJF415JN4NNNNN

The 20G1AJF415JN4NNNNN is very closely related to the target model.

It uses:

• 690 VAC.
• Three-phase operation.
• PowerFlex 755 architecture.
• Frame 8.
• IP54 / Type 12 construction.
• Forced-air cooling.
• Embedded EtherNet/IP.
• Local enhanced HIM.

Its 415 A rating is lower than the 460 A target model.

This makes it suitable where the motor current is lower but the same general PowerFlex 755 JN4 architecture is desired.

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46. Five Popular Model Comparison

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	Main Characteristic
25B-D030N114	380–480 VAC	30 A	—	15 kW	11 kW	D	Compact machine drive
25C-D030N114	380–480 VAC	30 A	—	15 kW	11 kW	D	Networked machine drive
20F1AND302JA0NNNNN	480 VAC	302 A	—	250 HP	200 HP	7	Large industrial drive
20G1AJE460JN4NNNNN	600 VAC	460 A	500 HP	500 HP	400 HP	8	High-power 600 V drive
20G1AJF415JN4NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8	High-power 690 V drive

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47. Application Selection Table

Application	Typical Duty	Suitability
Large Centrifugal Pump	Light / Normal	Excellent
Large Cooling-Water Pump	Light / Normal	Excellent
Process Pump	Normal	Excellent
Large Centrifugal Fan	Light / Normal	Excellent
Furnace Fan	Normal	Very Good
Dust-Collection Fan	Light / Normal	Excellent
Large Blower	Light / Normal	Excellent
Mine Ventilation	Light / Normal	Excellent
Mining Conveyor	Normal / Heavy	Very Good
Cement Conveyor	Normal / Heavy	Very Good
Bulk Material Conveyor	Normal	Very Good
Large Mixer	Heavy	Application Dependent
Crusher	Heavy	Application Dependent
Mine Dewatering	Normal	Excellent
Water Treatment	Light / Normal	Excellent
Industrial Wastewater	Normal	Excellent
Steel Processing	Normal / Heavy	Very Good
Process Machinery	Normal / Heavy	Very Good
High-Inertia Machine	Heavy	Requires Engineering Review
Regenerative Load	Special	Requires Braking Evaluation

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48. Installation Requirements

Electrical Installation

The drive should be installed in an electrical system appropriate for the 690 VAC three-phase voltage class.

The complete installation should consider:

• Upstream protection.
• Isolation.
• Grounding.
• Short-circuit conditions.
• Cable sizing.
• Motor protection.
• Electrical clearances.
• EMC requirements.

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Motor Selection

Motor nameplate current is one of the most important selection parameters.

The 460 A nominal rating should not be interpreted simply as a 460 A motor requirement.

The actual motor current should be compared against the applicable Light-Duty, Normal-Duty, or Heavy-Duty rating.

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Cable Selection

The motor cable should be selected based on:

• Motor current.
• Cable length.
• Temperature.
• Installation method.
• EMC requirements.
• Motor insulation.
• Shielding.
• Grounding.

Long motor cables should receive particular attention in high-power VFD applications.

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Ventilation

Because the drive is forced-air cooled, sufficient airflow must be maintained.

The electrical room should have adequate heat-removal capacity.

Airflow restrictions can increase the thermal stress on the drive.

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49. Mechanical Installation

The approximately 2477 mm height should be considered during cabinet-room planning.

The installation route should be checked for:

• Door height.
• Ceiling clearance.
• Elevator dimensions if applicable.
• Transportation route.
• Turning radius.
• Floor capacity.
• Lifting equipment.
• Maintenance access.

The approximately 644 kg reference weight also requires suitable mechanical handling equipment.

If additional option cabinets are included, the final weight can be considerably greater.

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50. Maintenance Advantages

The JN4 configuration provides an important advantage during maintenance because it combines network communication with local operator access.

Maintenance personnel can use the local HIM for:

• Parameter inspection.
• Drive status.
• Fault review.
• Alarm review.
• Commissioning.
• Manual operation where permitted.
• Troubleshooting.

At the same time, the PLC or SCADA system can continue to provide centralized monitoring.

This reduces dependence on a single operating method.

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51. Commissioning Advantages

The local enhanced HIM is particularly valuable during commissioning.

A technician can work directly at the drive while checking:

• Motor rotation.
• Reference commands.
• Operating frequency.
• Motor current.
• Drive status.
• Fault conditions.
• Parameter settings.
• Communication status.

This can make initial startup more efficient than a configuration without a local interface.

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52. Plant Standardization

The PowerFlex 755 family makes it possible to standardize drive architecture across a large facility.

For example:

Motor Requirement	Possible PowerFlex 755 Selection
Lower 690 V motor capacity	20G1AJF330JN4NNNNN
Medium-large 690 V motor	20G1AJF370JN4NNNNN
Large 690 V motor	20G1AJF415JN4NNNNN
Very large 690 V motor	20G1AJF460JN4NNNNN
Higher-capacity 690 V motor	20G1AJF500JN4NNNNN

Using related configurations can simplify engineering and maintenance.

Technicians become familiar with one general drive platform while different current ratings are used according to motor requirements.

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53. Local + Networked Operation

One of the strongest practical advantages of the JN4 model is the combination of local and networked operation.

A typical architecture is:

Central PLC / DCS

↓

EtherNet/IP

↓

20G1AJF460JN4NNNNN

↓

Large Industrial Motor

with local maintenance access through:

Enhanced LCD / Full Numeric HIM

This provides a useful separation between normal process control and local maintenance operations.

The plant control system can remain the primary process-control interface while the HIM is used for commissioning and maintenance.

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54. Product Advantages Summary

Advantage	Practical Benefit
690 VAC	Suitable for large industrial motor systems
460 A	High current capacity
500 kW LD	Excellent for large variable-torque loads
450 kW ND	Strong general industrial capability
375 kW HD	Supports more demanding load profiles
Frame 8	Suitable for large motor applications
IP54 / Type 12	Protected industrial cabinet
Forced Air	Suitable for high-power operation
Embedded EtherNet/IP	Direct network integration
Enhanced HIM	Local operation and diagnostics
IP66 / NEMA 4X/12 HIM	Protected local operator interface
Filtered	Supports electrical noise management
CM Jumper Installed	Defined common-mode configuration
AC Input with Precharge	Conventional high-power AC-input architecture
No DC Terminals	Straightforward conventional AC-input design
No Dynamic Braking	Suitable for applications with controlled deceleration
Broad Family	Easier plant-wide standardization

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55. Engineering Selection Checklist

Selection Item	Requirement
Supply Voltage	690 VAC
Supply Phase	Three Phase
Nominal Drive Current	460 A
Light-Duty Rating	500 kW
Normal-Duty Rating	450 kW
Heavy-Duty Rating	375 kW
Motor Nameplate Current	Verify
Motor Power	Verify
Load Torque	Verify
Starting Torque	Verify
Acceleration Time	Verify
Deceleration Time	Verify
Overload Requirement	Verify
Regenerative Energy	Evaluate
Dynamic Braking	Not Included
Cooling	Forced Air
Enclosure	IP54 / Type 12
Cabinet Depth	Approx. 800 mm
Approx. Height	2477 mm
Approx. Width	600 mm
Approx. Weight	644 kg
Network	Embedded EtherNet/IP
Local Interface	Enhanced LCD / Full Numeric HIM
HIM Protection	IP66 / NEMA Type 4X/12
Input	AC with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed

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56. Overall Product Assessment

The Allen-Bradley 20G1AJF460JN4NNNNN is a high-power PowerFlex 755 AC drive intended for large industrial motor applications.

Its 690 VAC, 460 A electrical configuration provides a substantial motor-control range.

The three primary duty ratings are:

500 kW Light Duty

450 kW Normal Duty

375 kW Heavy Duty

This makes the drive suitable for a broad range of large motors.

The Frame 8, IP54 / Type 12, 800 mm deep MCC-style cabinet provides a substantial protected industrial installation.

The forced-air cooling system is designed for the heat generated by high-power operation.

The embedded EtherNet/IP capability allows the drive to become part of a centralized industrial automation system.

The most important distinction of the JN4 configuration is its Enhanced LCD / Full Numeric HIM.

This provides local access for commissioning, troubleshooting, parameter management, and maintenance while still allowing the drive to be controlled through the plant network.

For large pumping and ventilation applications, the 500 kW Light-Duty rating makes the drive particularly attractive.

For general industrial equipment, the 450 kW Normal-Duty rating provides a strong operating range.

For higher-torque and higher-overload machinery, the 375 kW Heavy-Duty rating should be used as the appropriate reference.

The absence of dynamic braking should be carefully considered for high-inertia machines and applications requiring rapid stopping.

For conventional large pumps, fans, blowers, conveyors, and process equipment where controlled acceleration and deceleration are acceptable, this characteristic is generally easier to accommodate.

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57. Quick Technical Reference

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 750-Series
Drive Series	PowerFlex 755
Model	20G1AJF460JN4NNNNN
Voltage	690 VAC
Phase	Three Phase
Nominal Current	460 A
Light Duty	500 kW
Normal Duty	450 kW
Heavy Duty	375 kW
Cooling	Forced Air
Frame	8
Enclosure	IP54 / Type 12
Cabinet Style	MCC Style
Cabinet Depth	800 mm
Approx. Height	2477 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Filtered Depth	898 mm
Approx. Weight	644 kg
Input	AC with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD / Full Numeric
HIM Protection	IP66 / NEMA Type 4X/12
Light-Duty Current	500 A Continuous
Normal-Duty Current	460 A Continuous
Heavy-Duty Current	375 A Continuous
Main Applications	Pumps, fans, blowers, conveyors, mining, cement, water, process equipment
Closest Lower Model	20G1AJF415JN4NNNNN
Closest Higher Model	20G1AJF500JN4NNNNN
Same Power / No-HIM Version	20G1AJF460JN0NNNNN

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58. Final Recommendation

For a large industrial motor operating from a 690 VAC three-phase supply, the 20G1AJF460JN4NNNNN is a strong choice when the motor current and application duty fall within the 460 A class.

The model is particularly attractive where both centralized network control and local operator access are required.

Its embedded EtherNet/IP capability allows integration into the plant automation network, while the enhanced LCD / full-numeric HIM gives technicians a dedicated local interface.

For large centrifugal pumps and fans, the 500 kW Light-Duty rating provides substantial capacity.

For general industrial machinery, the 450 kW Normal-Duty rating provides a strong balance between power and overload capability.

For heavier machinery, the 375 kW Heavy-Duty rating provides a more conservative selection point.

The closest lower-current model is the 20G1AJF415JN4NNNNN, while the next higher configuration is the 20G1AJF500JN4NNNNN.

If the same 460 A electrical rating is required but a local operator interface is unnecessary, the 20G1AJF460JN0NNNNN provides the corresponding No-HIM configuration.

Overall, the 20G1AJF460JN4NNNNN combines 690 VAC operation, 460 A current capacity, 500/450/375 kW duty ratings, Frame 8 construction, IP54 / Type 12 protection, forced-air cooling, embedded EtherNet/IP, filtered input, CM jumper installed, AC input with precharge, no dynamic braking, and an enhanced IP66 / NEMA Type 4X/12 local HIM.

This combination makes it particularly suitable for large-scale industrial motor-control systems where high power, network integration, local diagnostics, protected cabinet construction, and a standardized PowerFlex 755 platform are required.