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Allen-Bradley 20G1AJF500JN4NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1AJF500JN4NNNNN is a high-power PowerFlex 755 AC Drive designed for large industrial motor-control applications where high output current, high motor voltage, protected enclosure construction, centralized automation, and local operator access are required.

This model belongs to the PowerFlex 750-Series and uses the PowerFlex 755 architecture.

The drive is designed for 690 VAC, three-phase power systems and has a nominal output current of 500 A.

Its principal motor-power ratings are approximately:

• 530 kW Light Duty
• 500 kW Normal Duty
• 400 kW Heavy Duty

The model uses Frame 8 construction and an IP54 / Type 12, 800 mm deep MCC-style enclosure.

It is an air-cooled, forced-air industrial AC drive with AC input and precharge, no DC terminals, filtered input, and CM jumper installed.

Unlike the JN0 configuration, which is supplied without a local HIM, the JN4 configuration is intended for installations requiring an enhanced local operator interface.

The product is particularly well suited to large pumps, fans, blowers, conveyors, mining systems, water-treatment equipment, cement equipment, material-handling systems, and large process machinery.

The catalog configuration identifies the product as an active PowerFlex air-cooled 755 AC drive with a 690 VAC rating and 800 mm size.

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2. Brand, Family, and 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	20G1AJF500JN4NNNNN
Voltage Class	690 VAC
Phase	Three Phase
Nominal Output Current	500 A
Light-Duty Rating	530 kW
Normal-Duty Rating	500 kW
Heavy-Duty Rating	400 kW
Frame Size	Frame 8
Cooling	Forced Air
Enclosure	IP54 / Type 12
Cabinet Style	800 mm Deep MCC Style
Input Type	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM Configuration	Enhanced LCD / Full Numeric
Communication	Embedded EtherNet/IP

The PowerFlex 755 series is intended for large, architecture-level industrial motor applications where flexible control, network communication, diagnostics, and a broad selection of hardware configurations are important.

The 690 VAC version is especially useful for large motor systems because the higher motor voltage permits large motor power to be transferred at lower current than would be required at a lower voltage.

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3. Main Technical Parameters

Parameter	Specification
Catalog Number	20G1AJF500JN4NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 750-Series
Drive	PowerFlex 755
Drive Type	Air-Cooled AC Drive
Voltage	690 VAC
Phase	Three Phase
Nominal Output Current	500 A
Light-Duty Rating	530 kW
Normal-Duty Rating	500 kW
Heavy-Duty Rating	400 kW
Frame Size	8
Cooling Method	Forced Air
Enclosure	IP54 / Type 12
Cabinet Style	MCC Style
Cabinet Depth	800 mm
Input	AC Input with Precharge
DC Terminals	None
Input Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Local Interface	Enhanced LCD / Full Numeric HIM
Approx. Height	2477 mm
Approx. Width	600 mm
Approx. Basic Depth	800 mm
Approx. Depth with Filter Arrangement	898 mm
Approx. Basic Weight	644 kg
Typical Application Class	Large Industrial Motor Control

The electrical configuration of the 500 A model is confirmed as 690 VAC, three phase, Frame 8, with AC input and precharge, no DC terminals, filtering, CM jumper installed, and no dynamic braking.

The 800 mm designation refers to the cabinet depth class. The mechanical figures above should be treated as typical Frame 8 reference dimensions, rather than a substitute for the final configured dimensional drawing.

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4. Product Configuration

The catalog number 20G1AJF500JN4NNNNN represents a particular configuration of the PowerFlex 755 platform.

Its main configuration can be summarized as follows:

Configuration Item	Model Configuration
Product	PowerFlex 755 AC Drive
Voltage Class	690 VAC
Output Current	500 A
Light Duty	530 kW
Normal Duty	500 kW
Heavy Duty	400 kW
Cooling	Forced Air
Input	AC with Precharge
DC Terminals	None
Enclosure	IP54 / Type 12
Cabinet Depth	800 mm
Frame	8
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Enhanced LCD / Full Numeric
Network	Embedded EtherNet/IP

This is a high-power configuration intended for permanent industrial installations rather than compact machine-level applications.

The physical construction, electrical capacity, and local operator interface make it appropriate for large motor systems where the drive is normally installed inside an electrical room, MCC area, process-control room, or dedicated drive room.

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5. PowerFlex 755 Series Position

The PowerFlex 755 series occupies the high-performance end of the PowerFlex 750-Series architecture.

It is intended for applications where the motor-drive system needs more capability than a compact general-purpose VFD.

Typical requirements include:

• High motor power.
• High output current.
• Large motor voltage.
• Networked control.
• Local operator access.
• Industrial enclosure protection.
• Flexible motor-control architecture.
• Diagnostic capability.
• Integration with plant automation.
• Large-scale process control.

The 20G1AJF500JN4NNNNN represents one of the larger standard 690 VAC configurations within this family.

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6. 690 VAC Three-Phase Operation

The 690 VAC rating is one of the most important characteristics of the model.

At 500 kW of motor power, the electrical system is substantially different from a small 15 kW or 30 kW machine.

A 690 VAC motor system can provide several advantages for large industrial motors.

Higher motor voltage means that a given motor power can be delivered with lower current than would be required at a lower voltage.

This can influence:

• Motor cable sizing.
• Switchgear selection.
• Busbar design.
• Motor feeder design.
• MCC configuration.
• Electrical-room layout.
• Transformer selection.
• Distribution-system design.

For large motors, the 690 VAC class is therefore a practical engineering choice in many industrial installations.

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7. 500 A Output Capacity

The model provides a nominal output current of 500 A.

This places it firmly in the high-power industrial drive category.

The 500 A rating should not be used by itself to determine motor compatibility.

Final selection should consider:

• Motor nameplate current.
• Motor voltage.
• Motor rated power.
• Motor service factor.
• Load torque.
• Starting torque.
• Acceleration time.
• Deceleration time.
• Overload requirements.
• Duty cycle.
• Ambient temperature.
• Installation altitude.
• Motor cable length.
• Braking requirements.

The motor’s actual full-load current is especially important.

Two motors with the same nominal kW rating can have different current requirements depending on motor design and operating conditions.

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8. Light-Duty Rating — 530 kW

The drive provides a 530 kW Light-Duty rating.

This is the highest motor-power rating associated with this configuration.

Light-Duty operation is generally associated with variable-torque loads where the load torque does not remain at a high level throughout the speed range.

Typical examples include:

• Large centrifugal pumps.
• Large centrifugal fans.
• Cooling-water pumps.
• Process ventilation fans.
• Circulation systems.
• Large blowers.
• Water-transfer systems.

For these types of loads, the 530 kW rating provides substantial capacity.

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9. Normal-Duty Rating — 500 kW

The 500 kW Normal-Duty rating is suitable for many general industrial motor applications.

Potential applications include:

• Process pumps.
• Conveyors.
• Fans.
• Blowers.
• Material-handling machinery.
• Process equipment.
• Utility machinery.
• General industrial equipment.

For a 500 kW motor, the actual motor nameplate current should be compared with the drive’s current capability before final selection.

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10. Heavy-Duty Rating — 400 kW

The 400 kW Heavy-Duty rating is intended for more demanding load conditions.

Heavy-duty applications can include equipment with:

• High starting torque.
• High continuous torque.
• High inertia.
• Frequent acceleration.
• Frequent load changes.
• Temporary overload requirements.

Potential applications include:

• Heavy conveyors.
• Material-handling equipment.
• Large process machinery.
• High-inertia machinery.
• Certain heavy-duty pumps.
• Processing equipment.

The Heavy-Duty rating is an important reason why the same drive may be appropriate for a 400 kW motor even when a different duty classification would permit a higher nominal motor-power value.

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11. Duty Rating Overview

Duty Classification	Approx. Continuous Current	Approx. 1-Minute Current	Approx. 3-Second Current	Motor Rating
Light Duty	530 A	583 A	—	530 kW
Normal Duty	500 A	550 A	750 A	500 kW
Heavy Duty	413 A	620 A	743 A	400 kW

These ratings demonstrate why the drive should be selected according to the actual load profile rather than only by motor horsepower or kilowatt rating.

A 400 kW motor with high starting torque can require a different drive selection from a 400 kW centrifugal pump.

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12. Embedded EtherNet/IP

The PowerFlex 755 platform supports embedded EtherNet/IP communication.

For a large industrial drive, this is an important feature because the drive can become part of the plant’s automation network.

Typical information exchanged through the control network can include:

• Start command.
• Stop command.
• Speed reference.
• Frequency reference.
• Drive status.
• Output current.
• Output frequency.
• Motor operating information.
• Fault information.
• Alarm information.
• Diagnostic information.

A typical architecture can be arranged as:

PLC / DCS

↓

Industrial Ethernet Network

↓

PowerFlex 755

↓

690 VAC Motor

This type of architecture is common in centralized process-control environments.

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13. JN4 Local Operator Interface

One of the main differences between the JN4 and JN0 configurations is the operator-interface arrangement.

The JN0 version is configured without a local HIM.

The JN4 configuration is associated with an enhanced LCD / full-numeric HIM arrangement.

This provides greater convenience during:

• Commissioning.
• Local setup.
• Parameter adjustment.
• Troubleshooting.
• Maintenance.
• Local status monitoring.

A local operator interface can be especially valuable in large industrial facilities where technicians need to work directly at the drive cabinet.

It reduces the need to access the control room for every basic inspection or adjustment.

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14. Advantages of the Enhanced LCD / Full-Numeric Interface

A local enhanced operator interface can be useful for viewing:

• Drive status.
• Fault conditions.
• Alarm conditions.
• Frequency.
• Speed.
• Current.
• Parameter values.
• Operating states.
• Diagnostic information.

During commissioning, a local display can make troubleshooting substantially more convenient.

For maintenance personnel, local access can also help identify drive conditions before connecting an external engineering workstation.

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15. Filtered Configuration

The model uses a filtered configuration.

Filtering is important in large variable-frequency-drive installations because the switching process can generate high-frequency electrical components.

Overall EMC behavior depends on the complete installation.

Relevant factors include:

• Drive filtering.
• Motor cable construction.
• Cable length.
• Cable routing.
• Grounding.
• Shielding.
• Cabinet design.
• Motor-frame grounding.
• Control-cable separation.
• Other equipment connected to the same power system.

For a 500 A drive, EMC should therefore be considered as part of the complete electrical installation.

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16. CM Jumper Installed

The JN4 configuration uses the CM jumper installed arrangement.

This is one of the important configuration differences between the JN family and the corresponding AN configurations.

The CM configuration affects the common-mode behavior of the drive system.

Engineering evaluation should consider:

• Power-system grounding.
• Electrical distribution structure.
• Motor insulation.
• Motor-cable length.
• Leakage current.
• EMC requirements.
• Grounding arrangement.
• Plant standards.

The CM configuration should always be consistent with the overall electrical-system design.

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17. AC Input with Precharge

The drive uses an AC input with precharge.

The precharge function is particularly important in a high-power drive because the internal DC bus contains significant capacitance.

During initial energization, the precharge system controls the charging process of the internal DC-link components.

This provides an appropriate architecture for conventional AC-fed variable-frequency-drive applications.

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18. No DC Terminals

The model is configured with no DC terminals.

This means the drive is intended primarily for conventional AC-input applications rather than an external common-DC-bus architecture.

Typical applications include:

• Pump systems.
• Fan systems.
• Blower systems.
• Conveyors.
• Process machinery.
• Material handling.
• Industrial utility equipment.
• Large manufacturing equipment.

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19. Dynamic Braking — None

The model has no dynamic braking in its standard configuration.

This is an important selection point for applications with significant regenerative energy.

During deceleration, a motor can return mechanical energy to the drive’s DC bus.

If the regenerated energy is high, DC-bus voltage can increase.

Therefore, applications requiring rapid or repeated deceleration should be evaluated for:

• Load inertia.
• Motor inertia.
• Operating speed.
• Deceleration time.
• Number of braking cycles.
• Regenerative power.
• Braking resistor requirements.
• Regenerative-drive requirements.

The absence of standard dynamic braking does not prevent the drive from being used in many industrial applications.

It simply means that braking requirements must be evaluated separately.

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20. Forced-Air Cooling

The drive uses forced-air cooling.

A 500 A drive operating at several hundred kilowatts generates substantial heat.

Correct airflow is therefore essential.

The installation should provide:

• Adequate ventilation.
• Correct cabinet clearances.
• Suitable room temperature.
• Proper HVAC capacity.
• Clean airflow paths.
• Cooling-fan maintenance.
• Appropriate environmental control.

When several large drives are installed in the same room, the combined heat load should be considered in the HVAC design.

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21. Frame 8 Construction

The product uses Frame 8 construction.

This is a large industrial drive enclosure.

It is not comparable in physical scale to a small wall-mounted 10 kW or 20 kW VFD.

The installation therefore requires careful planning for:

• Floor space.
• Cabinet height.
• Cabinet width.
• Cabinet depth.
• Cable entry.
• Maintenance access.
• Door clearance.
• Transportation.
• Lifting.
• Floor loading.

A typical Frame 8 reference is approximately:

2477 mm height × 600 mm width × 800 mm depth

with an approximate basic weight of:

644 kg

These dimensions and weight should be treated as a basic Frame 8 reference. The actual assembled system can become larger and heavier depending on the selected options and associated cabinets.

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22. Mechanical Parameters

Mechanical Parameter	Approximate Specification
Model	20G1AJF500JN4NNNNN
Frame	8
Enclosure	IP54 / Type 12
Cabinet Style	800 mm Deep MCC Style
Height	2477 mm
Width	600 mm
Basic Depth	800 mm
Approx. Depth with Filter Arrangement	898 mm
Approx. Basic Weight	644 kg
Cooling	Forced Air
Installation Type	Floor-Mounted Industrial Cabinet
Local Operator Interface	Enhanced LCD / Full Numeric

For final cabinet layout, transportation, and foundation design, the configured dimensional drawing should be used.

The 644 kg figure is best treated as a basic drive/frame reference rather than a guaranteed final shipping weight for every configured installation.

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23. IP54 / Type 12 Protection

The product is configured as an IP54 / Type 12, 800 mm deep MCC-style drive.

This construction is appropriate for many industrial electrical-room environments.

Typical locations include:

• Electrical rooms.
• MCC rooms.
• Process-control rooms.
• Pumping-station electrical rooms.
• Manufacturing facilities.
• Mining electrical rooms.
• Cement plants.
• Water-treatment plants.

The enclosure provides substantially more environmental protection than an open-frame drive.

For outdoor locations, chemical exposure, washdown areas, heavy condensation, or corrosive environments, additional environmental evaluation is required.

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24. Large Pump Applications

The 20G1AJF500JN4NNNNN is particularly well suited to large pumping systems.

Potential applications include:

• Raw-water pumps.
• High-lift pumps.
• Cooling-water pumps.
• Industrial transfer pumps.
• Process-water pumps.
• Mine-dewatering pumps.
• Circulation pumps.
• Wastewater pumps.
• Large utility pumps.

Variable-speed control allows pump speed to be adjusted according to process demand.

A typical control arrangement can be:

Pressure / Flow Sensor

↓

PLC / DCS

↓

EtherNet/IP

↓

PowerFlex 755

↓

690 VAC Pump Motor

This provides a practical architecture for automated pumping systems.

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25. Fan Applications

Large fans are another strong application area.

Potential applications include:

• Furnace fans.
• Exhaust fans.
• Mine ventilation.
• Combustion-air fans.
• Cooling fans.
• Dust-collection fans.
• Process ventilation.
• Large industrial HVAC systems.

For variable-torque fan loads, the high Light-Duty rating can be particularly valuable.

The drive can adjust fan speed according to the actual ventilation requirement.

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26. Blower Applications

Large industrial blowers can require hundreds of kilowatts of motor power.

The model can be considered for:

• Aeration blowers.
• Process-air blowers.
• Combustion-air blowers.
• Pneumatic conveying.
• Industrial ventilation.
• Dust-collection systems.
• Process-gas systems.

The network capability allows blower operating conditions to be incorporated into the wider plant control system.

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27. Conveyor Applications

The drive is suitable for large conveyor systems.

Potential applications include:

• Mining conveyors.
• Cement conveyors.
• Aggregate conveyors.
• Port conveyors.
• Bulk-material conveyors.
• Ore-handling conveyors.
• Coal-handling conveyors.
• Industrial material-handling systems.

A variable-frequency drive can provide controlled acceleration and deceleration.

This can reduce mechanical shock on:

• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Belts.
• Drive pulleys.

For high-inertia conveyors, however, braking and acceleration calculations should be completed before final drive selection.

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28. Mining Applications

The combination of 690 VAC operation, 500 A output capability, Frame 8 construction, and industrial enclosure protection makes this model suitable for many large mining applications.

Potential uses include:

• Mine ventilation.
• Mine dewatering.
• Large conveyors.
• Ore handling.
• Material processing.
• Large fans.
• Large pumps.
• Utility systems.

The drive can be located in a controlled electrical room while the motor is installed remotely at the process equipment.

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29. Cement Industry Applications

Cement plants commonly use large variable-speed motors.

Potential applications include:

• Process fans.
• Exhaust fans.
• Dust collectors.
• Conveyors.
• Material handling.
• Cooling systems.
• Large pumps.
• Blowers.
• Utility systems.

The high-power PowerFlex 755 architecture is appropriate where several hundred kilowatts of motor power are required.

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30. Steel and Metal Processing

Large steel and metal-processing plants can also use this drive for auxiliary and process equipment.

Potential applications include:

• Cooling-water pumps.
• Process fans.
• Exhaust systems.
• Large conveyors.
• Material-handling equipment.
• Utility pumps.
• Process ventilation.

The embedded network capability can allow drive information to be integrated into centralized plant control.

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31. Water and Wastewater Applications

The drive can be used in large water and wastewater installations.

Potential applications include:

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

A PLC or DCS can adjust motor speed according to:

• Flow.
• Pressure.
• Tank level.
• Process demand.

This is particularly useful in large automated pumping stations.

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32. Process Industry Applications

The drive can be applied across many process industries.

Potential industries include:

• Mining.
• Cement.
• Steel.
• Water treatment.
• General manufacturing.
• Bulk material handling.
• Industrial utilities.
• Process manufacturing.
• Large infrastructure systems.

The final application should always be checked against actual motor current, torque, acceleration, braking, environmental, and duty requirements.

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33. Major Product Advantages

33.1 High-Power 690 VAC Platform

The 690 VAC rating allows the drive to serve large motor systems.

This is particularly useful for motors in the several-hundred-kilowatt range.

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33.2 500 A Current Capacity

The 500 A output class provides substantial motor-control capability.

It allows the drive to serve applications that would be beyond the practical range of smaller PowerFlex configurations.

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33.3 530 kW Light-Duty Rating

The 530 kW Light-Duty rating provides significant capacity for variable-torque equipment.

Large centrifugal pumps and fans are good examples.

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33.4 500 kW Normal-Duty Rating

The 500 kW Normal-Duty rating covers a broad range of general industrial machinery.

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33.5 400 kW Heavy-Duty Rating

The 400 kW Heavy-Duty rating provides a useful capability for higher-demand applications.

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33.6 Enhanced Local Operator Interface

The JN4 configuration provides an enhanced LCD/full-numeric local interface.

This is valuable during:

• Commissioning.
• Maintenance.
• Troubleshooting.
• Local adjustment.
• Drive-status checking.

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33.7 Embedded EtherNet/IP

The network interface makes the drive suitable for modern centralized industrial automation architectures.

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33.8 IP54 / Type 12 Protection

The protected enclosure is suitable for many industrial electrical-room environments.

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33.9 Frame 8 High-Power Construction

Frame 8 provides a platform for very large industrial motors.

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33.10 Standardized PowerFlex Architecture

Using a PowerFlex 755 platform across several motor sizes can simplify:

• Engineering.
• Commissioning.
• Training.
• Maintenance.
• Spare-parts management.
• Troubleshooting.
• Control-system integration.

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34. JN4 Compared with JN0

The closest alternative is 20G1AJF500JN0NNNNN.

Both models are 690 VAC, 500 A PowerFlex 755 configurations.

The main difference is the operator-interface arrangement.

Parameter	20G1AJF500JN4NNNNN	20G1AJF500JN0NNNNN
Voltage	690 VAC	690 VAC
Current	500 A	500 A
Light Duty	530 kW	530 kW
Normal Duty	500 kW	500 kW
Heavy Duty	400 kW	400 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed
Dynamic Braking	None	None
EtherNet/IP	Embedded	Embedded
Local HIM	Enhanced LCD / Full Numeric	No HIM

The JN4 is therefore the better choice when local operator interaction is important.

The JN0 is more appropriate when the drive is intended to be operated entirely through a PLC, DCS, SCADA system, or remote HMI.

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35. JN4 Compared with AN0

Another useful comparison is the corresponding AN0 configuration.

Parameter	20G1AJF500JN4NNNNN	20G1AJF500AN0NNNNN
Voltage	690 VAC	690 VAC
Current	500 A	500 A
Light Duty	530 kW	530 kW
Normal Duty	500 kW	500 kW
Heavy Duty	400 kW	400 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
Filtering	Filtered	Filtered
CM Jumper	Installed	Removed
Dynamic Braking	None	None
HIM	Enhanced LCD / Full Numeric	No HIM
EtherNet/IP	Embedded	Embedded

The JN4 provides both the CM-jumper-installed configuration and local operator interface.

This makes it particularly useful where both electrical-system compatibility and local maintenance access are important.

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36. Five Recommended Related Models

The following models are closely related 690 VAC PowerFlex 755 configurations.

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	HIM
20G1AJF330JN4NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	8	Enhanced LCD / Full Numeric
20G1AJF370JN4NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	8	Enhanced LCD / Full Numeric
20G1AJF415JN4NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8	Enhanced LCD / Full Numeric
20G1AJF460JN4NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	8	Enhanced LCD / Full Numeric
20G1AJF500JN0NNNNN	690 VAC	500 A	530 kW	500 kW	400 kW	8	No HIM

These models provide a logical range for large 690 VAC motor applications.

The 330 A, 370 A, 415 A, and 460 A models can be selected when the motor does not require the full 500 A capacity.

The 500 A JN0 model provides the same fundamental power class without the local JN4 operator interface.

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37. Related Model Comparison

Model	Nominal Current	LD Power	ND Power	HD Power	Frame	Enclosure
20G1AJF330JN4NNNNN	330 A	355 kW	315 kW	250 kW	8	IP54 / Type 12
20G1AJF370JN4NNNNN	370 A	400 kW	355 kW	300 kW	8	IP54 / Type 12
20G1AJF415JN4NNNNN	415 A	450 kW	400 kW	355 kW	8	IP54 / Type 12
20G1AJF460JN4NNNNN	460 A	500 kW	450 kW	375 kW	8	IP54 / Type 12
20G1AJF500JN4NNNNN	500 A	530 kW	500 kW	400 kW	8	IP54 / Type 12

This range makes the 690 VAC PowerFlex 755 family convenient for plant standardization.

The drive rating can be matched more closely to the actual motor current rather than selecting one oversized drive for every application.

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38. Five Popular Allen-Bradley Models

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	Compact industrial machinery
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	Approx. 500 HP LD / 500 HP ND / 400 HP HD	8	IP54	Large 600 VAC motors
20G1AJF415JN4NNNNN	PowerFlex 755	690 VAC	415 A	450 kW LD / 400 kW ND / 355 kW HD	8	IP54	Large 690 VAC motors

These five models represent different sections of the PowerFlex product range.

The PowerFlex 525 and 527 models are primarily suited to smaller machine applications.

The PowerFlex 753 occupies a larger industrial-drive category.

The PowerFlex 755 models are intended for higher-performance and higher-power industrial applications.

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39. 25B-D030N114

The 25B-D030N114 is a PowerFlex 525 drive intended for compact industrial applications.

Typical uses include:

• Small pumps.
• Fans.
• Conveyors.
• Packaging machinery.
• Machine tools.
• Small process equipment.

Compared with the target 500 A PowerFlex 755, it is dramatically smaller.

Its principal advantage is compact machine integration rather than high-power motor control.

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40. 25C-D030N114

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

It is intended for networked machine-control applications.

Potential applications include:

• Packaging.
• Automated conveyors.
• Small material-handling equipment.
• Production machinery.
• Machine automation.

It provides a useful lower-power alternative when the application does not require the large Frame 8 architecture of the PowerFlex 755.

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41. 20F1AND302JA0NNNNN

The 20F1AND302JA0NNNNN is a PowerFlex 753 configuration intended for larger 480 VAC industrial motors.

Typical applications include:

• Pumps.
• Fans.
• Conveyors.
• Process machinery.
• Material handling.
• Industrial utility equipment.

It represents a useful intermediate step between compact PowerFlex drives and very large PowerFlex 755 installations.

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42. 20G1AJE460JN4NNNNN

The 20G1AJE460JN4NNNNN is a PowerFlex 755 configuration in the 600 VAC class.

It is intended for large motors operating on a 600 VAC system.

Its overall application class is similar to the target model because both use high-power Frame 8 PowerFlex 755 architecture.

The major difference is the voltage class.

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43. 20G1AJF415JN4NNNNN

The 20G1AJF415JN4NNNNN is another 690 VAC PowerFlex 755 JN4 configuration.

It provides a lower current capacity than the target 500 A model.

Its principal ratings are approximately:

• 415 A nominal current.
• 450 kW Light Duty.
• 400 kW Normal Duty.
• 355 kW Heavy Duty.
• Frame 8.
• IP54 / Type 12.
• 800 mm deep MCC style.
• Forced-air cooling.
• Embedded EtherNet/IP.

It is a strong choice when the motor does not require the full 500 A capacity.

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44. Application Selection Table

Application	Typical Duty	Suitability
Large Centrifugal Pump	Light / Normal	Excellent
Raw-Water Pump	Light / Normal	Excellent
High-Lift Pump	Normal	Excellent
Cooling-Water Pump	Light / Normal	Excellent
Large Centrifugal Fan	Light / Normal	Excellent
Furnace Fan	Normal	Very Good
Mine Ventilation Fan	Light / Normal	Excellent
Large Blower	Light / Normal	Excellent
Aeration Blower	Light / Normal	Excellent
Dust-Collection Fan	Light / Normal	Excellent
Large Conveyor	Normal / Heavy	Very Good
Mining Conveyor	Normal / Heavy	Very Good
Cement Conveyor	Normal / Heavy	Very Good
Bulk Material Handling	Normal	Very Good
Industrial Wastewater	Normal	Excellent
Process-Water Pump	Light / Normal	Excellent
Steel Cooling System	Normal	Very Good
General Process Machinery	Normal / Heavy	Very Good
High-Inertia Machinery	Heavy	Requires Engineering Review
Rapid-Stop Machinery	Special	Braking Evaluation Required
Regenerative Load	Special	Regenerative/Braking Evaluation Required

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45. Pump-System Benefits

Large pumping systems are one of the most practical applications for this drive.

A fixed-speed motor can only operate at its normal operating speed unless additional mechanical control equipment is used.

A variable-frequency drive allows motor speed to be changed electronically.

This can provide:

• Better flow control.
• Better pressure control.
• Smoother operation.
• Reduced mechanical stress.
• Flexible process control.
• Easier integration with automatic control loops.

For a large water system, the drive can receive a speed reference from a PLC based on discharge pressure or flow.

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46. Fan-System Benefits

Fans are generally well suited to variable-speed control.

The drive can adjust motor speed according to ventilation requirements.

Applications can include:

• Mine ventilation.
• Furnace ventilation.
• Process exhaust.
• Cooling.
• Dust collection.
• Combustion air.
• Industrial HVAC.

The high Light-Duty capability of the model makes it particularly suitable for large variable-torque fan loads.

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47. Conveyor-System Benefits

Large conveyors often benefit from controlled acceleration.

A controlled acceleration profile can reduce sudden mechanical loading.

This can help protect:

• Belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Pulleys.

The drive also allows conveyor speed to be adjusted to production requirements.

For conveyors with significant regenerative energy during stopping or downhill operation, a dedicated braking or regenerative solution should be evaluated.

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48. Mining-System Benefits

Mining systems can require large motor power and centralized monitoring.

The PowerFlex 755 architecture can provide:

• High motor-power capacity.
• Variable-speed operation.
• Network communication.
• Local diagnostics.
• Controlled acceleration.
• Protected cabinet construction.
• Standardized drive architecture.

This makes it suitable for many mining auxiliary and processing applications.

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49. Water-System Benefits

Large water facilities often operate with changing flow requirements.

For example, a pump may need to increase speed during peak demand and reduce speed during low-demand periods.

The drive can be integrated into a control loop involving:

• Pressure sensors.
• Flow meters.
• Level transmitters.
• PLCs.
• DCS systems.

The resulting architecture provides a flexible method of matching motor speed to actual process requirements.

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50. Process-Control Architecture

A typical installation can be organized as:

Process Sensors

↓

PLC / DCS

↓

EtherNet/IP

↓

PowerFlex 755

↓

690 VAC Motor

↓

Pump / Fan / Conveyor / Process Equipment

The drive’s local JN4 interface provides an additional access point for technicians.

This combination of centralized automation and local operator access is particularly useful in large industrial facilities.

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51. Local and Remote Operation

The model can be incorporated into a control architecture where the PLC provides the main operating commands while the local HIM provides maintenance and commissioning access.

This arrangement can provide two practical operating levels.

Centralized Control

The main plant controller manages:

• Start/stop.
• Speed reference.
• Process control.
• Interlocks.
• Alarms.
• Sequence control.

Local Maintenance Access

The local HIM can be used for:

• Status checks.
• Parameter inspection.
• Fault identification.
• Commissioning.
• Troubleshooting.

This dual approach is useful in large industrial plants.

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52. Installation Requirements

Because this is a large Frame 8 drive, installation should be planned at the project-design stage.

Important considerations include:

• Cabinet location.
• Floor loading.
• Cable routing.
• Incoming power.
• Motor feeder routing.
• Grounding.
• Ventilation.
• HVAC.
• Maintenance clearance.
• Door clearance.
• Transportation route.
• Lifting arrangements.

The approximate 2477 mm cabinet height should be considered when planning the electrical room.

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53. Floor Loading

The approximate basic weight of the Frame 8 drive is around 644 kg.

The actual configured assembly may be heavier.

Therefore, the floor should be checked for:

• Static loading.
• Dynamic loading during transportation.
• Cabinet support.
• Anchoring.
• Seismic requirements where applicable.

The final equipment weight should be confirmed from the configured project documentation.

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54. Transportation Considerations

A Frame 8 drive is substantially larger than a compact industrial VFD.

Transportation planning should verify:

• Door openings.
• Corridor width.
• Ceiling height.
• Turning radius.
• Forklift capacity.
• Lifting equipment.
• Cabinet center of gravity.
• Final installation position.

The approximate cabinet height of 2477 mm should receive particular attention.

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55. Cooling and Heat Management

At this power level, thermal management is a major engineering consideration.

The electrical room should be designed to dissipate heat generated by:

• Power semiconductors.
• Switching devices.
• Internal electronics.
• Cooling fans.
• Associated equipment.

If multiple high-power drives are installed in the same room, their combined losses can become a significant HVAC load.

The room should therefore be designed with adequate:

• Cooling capacity.
• Ventilation.
• Air circulation.
• Environmental filtration.

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56. Maintenance Advantages

The JN4 configuration provides a practical advantage during maintenance because a local operator interface is available.

Technicians can inspect operating information directly at the drive.

Typical maintenance activities can include:

• Checking drive status.
• Reviewing fault conditions.
• Checking operating parameters.
• Inspecting cooling fans.
• Inspecting cabinet airflow.
• Checking electrical connections.
• Reviewing motor current.
• Checking communication status.
• Verifying network operation.

This can shorten troubleshooting time in large plants.

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57. Network Integration

The embedded EtherNet/IP capability allows the drive to participate in an industrial automation network.

A large plant may use a network structure such as:

Device Level	Typical Equipment
Supervisory Level	SCADA / Plant HMI
Control Level	PLC / DCS
Network Level	Industrial Ethernet
Drive Level	PowerFlex 755
Field Level	Motors / Pumps / Fans / Conveyors

This provides a scalable architecture for plants containing many variable-speed motors.

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58. Plant Standardization

Using multiple models from the same PowerFlex 755 family can simplify plant engineering.

For example:

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

This progression makes it easier to match drive current to motor requirements.

The 690 VAC PowerFlex 755 selection data places these high-power configurations within the Frame 8 class.

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59. Engineering Selection Checklist

Selection Factor	Requirement
Supply Voltage	690 VAC
Supply Phase	Three Phase
Motor Voltage	Must Match
Motor Current	Must Be Checked
Motor Power	Must Be Checked
Duty Type	LD / ND / HD
Continuous Torque	Verify
Starting Torque	Verify
Acceleration Time	Verify
Deceleration Time	Verify
Load Inertia	Verify
Regenerative Energy	Evaluate
Braking Requirement	Evaluate
Ambient Temperature	Verify
Installation Altitude	Verify
Cooling	Forced Air
Enclosure Environment	Verify
Motor Cable Length	Verify
EMC Requirements	Verify
Grounding	Verify
CM Jumper	Installed
Local HIM	Required / Available
Network	EtherNet/IP

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60. Recommended Use by Motor Type

Motor / Equipment Type	Suitability
690 VAC Pump Motor	Excellent
690 VAC Fan Motor	Excellent
690 VAC Blower Motor	Excellent
Large Conveyor Motor	Very Good
Mining Equipment Motor	Very Good
Cement Plant Motor	Very Good
Steel Plant Auxiliary Motor	Very Good
Water-System Motor	Excellent
Wastewater Motor	Excellent
High-Inertia Motor	Requires Duty Review
Regenerative Motor Load	Requires Braking Review
Frequent Rapid-Deceleration Load	Requires Braking Review

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61. Key Advantages of the JN4 Version

The JN4 configuration provides a combination of features that make it attractive for large industrial installations.

The most important characteristics are:

500 A high-current capability

690 VAC three-phase operation

530 kW Light-Duty rating

500 kW Normal-Duty rating

400 kW Heavy-Duty rating

Frame 8 construction

IP54 / Type 12 enclosure

800 mm deep MCC-style cabinet

Forced-air cooling

Embedded EtherNet/IP

Filtered input

CM jumper installed

No dynamic braking

Enhanced LCD / Full Numeric HIM

AC input with precharge

No DC terminals

This combination gives the model a strong position in large pump, fan, conveyor, mining, water, cement, and process applications.

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62. Final Technical Summary

Item	Final Specification
Brand	Allen-Bradley
Family	PowerFlex
Series	PowerFlex 750-Series
Drive Series	PowerFlex 755
Model	20G1AJF500JN4NNNNN
Voltage	690 VAC
Phase	3 Phase
Nominal Current	500 A
Light Duty	530 kW
Normal Duty	500 kW
Heavy Duty	400 kW
Frame	8
Cooling	Forced Air
Enclosure	IP54 / Type 12
Cabinet Style	800 mm Deep MCC Style
Approx. Height	2477 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Filtered Depth	898 mm
Approx. Weight	644 kg
Input	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD / Full Numeric
Main Application	Large Industrial Motor Control

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63. Overall Product Assessment

The Allen-Bradley 20G1AJF500JN4NNNNN is a high-power industrial AC drive intended for large 690 VAC three-phase motor applications.

Its 500 A nominal output capability and 530 kW Light-Duty / 500 kW Normal-Duty / 400 kW Heavy-Duty ratings provide a wide operating range for large industrial equipment.

The Frame 8 IP54 / Type 12 800 mm deep MCC-style enclosure provides a protected cabinet arrangement suitable for many industrial electrical rooms.

The forced-air cooling system is appropriate for the thermal requirements of a drive operating in the several-hundred-kilowatt range.

The embedded EtherNet/IP capability makes the drive suitable for centralized PLC, DCS, SCADA, and plant automation architectures.

The JN4 configuration adds an enhanced LCD/full-numeric local operator interface, making the model particularly attractive where technicians need local access during commissioning and maintenance.

The filtered input and CM jumper installed configuration also provides a defined electrical configuration for projects that require this common-mode arrangement.

The lack of standard dynamic braking means that applications with high regenerative energy, rapid stopping, downhill conveyors, or frequent deceleration cycles should receive a dedicated braking assessment.

From a plant-engineering perspective, the model is particularly well suited to:

• Large water pumps.
• High-capacity process pumps.
• Large centrifugal fans.
• Mine ventilation systems.
• Large blowers.
• Mining conveyors.
• Cement conveyors.
• Bulk-material handling.
• Steel-plant auxiliary systems.
• Industrial wastewater systems.
• Large process machinery.
• General high-power variable-speed motor systems.

The most important selection point is not simply the motor’s nominal kW rating.

The engineer should compare the motor’s actual nameplate current, required torque, overload profile, acceleration requirements, braking requirements, ambient conditions, cable length, grounding system, and plant electrical architecture with the drive’s capabilities.

For applications that require a local operator interface, the 20G1AJF500JN4NNNNN is a stronger choice than the JN0 configuration.

For applications where all operation is performed through a PLC or DCS and a local HIM is unnecessary, the 20G1AJF500JN0NNNNN provides a closely related alternative.

For lower-power 690 VAC systems, the 330 A, 370 A, 415 A, and 460 A PowerFlex 755 configurations provide a practical family progression.

Overall, the 20G1AJF500JN4NNNNN is best characterized as a high-capacity, 690 VAC, 500 A, Frame 8 PowerFlex 755 AC drive with protected IP54 / Type 12 construction, embedded EtherNet/IP communication, filtered input, CM jumper installed, forced-air cooling, and an enhanced local operator interface.

It is particularly appropriate for large industrial installations where high motor power, centralized automation, local maintenance access, and robust cabinet construction are all required.