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Allen-Bradley 20G1AJF330JN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1AJF330JN0NNNNN is a high-power PowerFlex 755 AC Drive designed for large industrial motor-control applications where high power, reliable variable-speed operation, overload capability, network integration and enclosed industrial construction are required.

This model is a 690 VAC, three-phase, 330 A, Frame 8, air-cooled AC drive. It is configured for AC input with precharge, has no DC input terminals, includes embedded EtherNet/IP, and uses an IP54 / NEMA Type 12, 800 mm deep MCC-style enclosure.

The drive has a 355 kW Light-Duty rating, 315 kW Normal-Duty rating and 250 kW Heavy-Duty rating. This makes it suitable for a broad range of large industrial motors and machinery.

The JN0 configuration is supplied without a local HIM. This configuration is therefore particularly suitable for installations where drive control and monitoring are handled through the plant automation system, an external HMI, or the embedded communication network.

The drive uses a filtered input configuration with the common-mode jumper installed. It does not include a dynamic-braking transistor in this configuration.

The Frame 8 enclosure makes the product a large floor-mounted industrial drive rather than a compact machine-mounted VFD. It is intended for applications such as large pumps, fans, blowers, conveyors, compressors, mixers, process machinery, material-handling equipment and other high-power rotating machinery.

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2. Product Identification

Parameter	Specification
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Type	High-Power Air-Cooled AC Drive
Catalog Number	20G1AJF330JN0NNNNN
Input Voltage Class	690 VAC
Input Phase	Three Phase
Rated Output Current	330 A
Light-Duty Rating	355 kW
Normal-Duty Rating	315 kW
Heavy-Duty Rating	250 kW
Frame Size	Frame 8
Cooling Method	Forced Air
Input Architecture	AC Input with Precharge
DC Terminals	None
Communication	Embedded EtherNet/IP
Input Filtering	Filtered
Common-Mode Jumper	Installed
Dynamic Braking	None
Enclosure	IP54 / NEMA Type 12
Cabinet Style	800 mm Deep MCC Style
Local HIM	Blank / No HIM
Installation	Floor-Mounted
Primary Function	Variable-Speed Control of Large AC Motors

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3. Product Series

The 20G1AJF330JN0NNNNN belongs to the PowerFlex 755 series.

The PowerFlex 755 platform is intended for demanding industrial motor-control applications where a conventional small variable-frequency drive is not sufficient.

The family is designed around large industrial motor systems and provides functions for speed regulation, torque control, process integration, network communication, diagnostics and advanced drive management.

The 690 VAC version is especially suitable for large motors.

At this power level, using a higher motor voltage can help keep motor current within a practical range for the electrical distribution system.

The 20G1AJF330JN0NNNNN combines this high-voltage architecture with a 330 A output class and Frame 8 construction.

This gives the product a clear position in large industrial motor-control systems.

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4. Main Electrical Specifications

Electrical Parameter	Specification
Catalog Number	20G1AJF330JN0NNNNN
Nominal Input Voltage	690 VAC
Input Voltage Class	690 VAC
Input Phase	3 Phase
Input Frequency	50/60 Hz class
Nominal Output Current	330 A
Light-Duty Continuous Current	370 A
Light-Duty 1-Minute Current	407 A
Light-Duty Power	355 kW
Normal-Duty Continuous Current	330 A
Normal-Duty 1-Minute Current	363 A
Normal-Duty 3-Second Current	495 A
Normal-Duty Power	315 kW
Heavy-Duty Continuous Current	265 A
Heavy-Duty 1-Minute Current	292 A
Heavy-Duty 3-Second Current	398 A
Heavy-Duty Power	250 kW
Input Configuration	AC Input with Precharge
DC Input Terminals	None
Output	Three-Phase Variable-Frequency AC
Cooling	Forced Air
Frame	8
Dynamic Braking	None
Input Filtering	Filtered
Common-Mode Jumper	Installed
Communication	Embedded EtherNet/IP

The 330 A continuous output rating places this model in the high-power industrial category.

Its 315 kW Normal-Duty rating is particularly important because this is the rating commonly associated with general-purpose industrial motor operation.

The drive can also be applied at approximately 355 kW under Light-Duty conditions.

For more demanding constant-torque applications, the Heavy-Duty rating is approximately 250 kW.

The difference between these ratings reflects the thermal and overload requirements of different types of loads.

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5. Duty Rating Explained

Industrial motor applications do not all impose the same electrical and mechanical load on a drive.

A large centrifugal fan, for example, normally behaves differently from a heavily loaded conveyor.

For this reason, the PowerFlex 755 uses different duty categories.

Light-Duty

The Light-Duty rating is approximately 355 kW.

This rating is appropriate for applications with comparatively moderate overload requirements and variable-torque characteristics.

Typical examples include large fans and centrifugal pumps.

Normal-Duty

The Normal-Duty rating is approximately 315 kW.

This is a useful reference for general industrial applications where the motor load is substantial but the application does not require the higher overload capability associated with heavy-duty operation.

Heavy-Duty

The Heavy-Duty rating is approximately 250 kW.

This rating is intended for applications where higher torque demand and greater overload requirements are expected.

Examples can include large conveyors, mixers, material-handling systems and other constant-torque equipment.

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6. Overload Capability

The drive provides short-duration overload capability in addition to its continuous output rating.

The Light-Duty current capability is approximately:

• 370 A continuous.
• 407 A for one minute.

The Normal-Duty capability is approximately:

• 330 A continuous.
• 363 A for one minute.
• 495 A for three seconds.

The Heavy-Duty capability is approximately:

• 265 A continuous.
• 292 A for one minute.
• 398 A for three seconds.

This overload capability is important for applications where the motor temporarily experiences a higher torque demand.

Examples include conveyor startup, acceleration of high-inertia machinery, temporary material loading and process disturbances.

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7. Mechanical Specifications

Mechanical Parameter	Specification
Catalog Number	20G1AJF330JN0NNNNN
Frame Size	Frame 8
Enclosure	IP54 / NEMA Type 12
Cabinet Style	MCC Style
Nominal Cabinet Depth	800 mm
Approximate Height	2477 mm
Approximate Width	600 mm
Approximate Depth	800 mm
Approximate Depth with Filter	Up to approximately 898 mm
Approximate Base Drive Weight	644 kg
Approximate Weight with Drive and Option Cabinets	Up to approximately 1166 kg, depending on configuration
Cooling	Forced Air
Mounting	Floor-Mounted
Service Access	Front / Service Access
Local HIM	Blank / No HIM
Installation Environment	Industrial Electrical Room / MCC Area

The standard Frame 8 IP54 / NEMA Type 12 arrangement has an approximate basic envelope of 2477 mm high × 600 mm wide × 800 mm deep.

The approximate base-drive weight is 644 kg.

If additional option cabinets are included, the overall equipment width and weight can increase significantly. A full drive-and-option-cabinet arrangement can reach approximately 1166 kg, depending on the final configuration.

The filtered arrangement can also increase the effective depth to approximately 898 mm.

For foundation design, lifting calculations, shipping arrangements and final cabinet installation, the exact mechanical drawing should be used rather than relying solely on these reference dimensions.

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8. Physical Construction

The 20G1AJF330JN0NNNNN is a large Frame 8 industrial drive.

Its mechanical construction is intended for floor-mounted installation.

The enclosure provides space for:

• Power electronics.
• Cooling equipment.
• Control electronics.
• Input filtering.
• Power connections.
• Communication equipment.
• Protection components.
• Internal wiring.
• Service access.

The large enclosure is particularly useful in centralized electrical rooms and MCC installations.

It is not intended to compete with compact wall-mounted VFDs in terms of physical size.

Instead, its purpose is to provide a robust architecture for high-power industrial motor systems.

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9. 690 VAC Electrical Architecture

One of the most important features of the 20G1AJF330JN0NNNNN is its 690 VAC input class.

For large motors, a higher operating voltage can reduce the current required for a given amount of power.

This can be advantageous in large industrial plants where cable size, switchgear current rating, transformer capacity and distribution architecture are important design considerations.

The 690 VAC platform is commonly associated with large motors and high-power rotating equipment.

Applications can include:

• Large pumps.
• Large fans.
• Industrial blowers.
• Large conveyors.
• Compressors.
• Material-handling systems.
• Process machinery.
• Utility equipment.
• Heavy industrial machinery.

The motor, transformer and electrical distribution system must all be designed for the applicable voltage class.

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10. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication.

This allows the drive to become part of a networked industrial automation system.

The drive can exchange information such as:

• Start and stop commands.
• Speed references.
• Motor speed.
• Output current.
• Drive status.
• Warning conditions.
• Fault information.
• Diagnostic information.
• Process-related data.

This is especially useful in plants where many large drives are centrally monitored.

The communication network can reduce the amount of traditional point-to-point control wiring required for many drive-control functions.

It can also improve troubleshooting because maintenance personnel can access drive information through the plant control architecture.

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11. JN0 Configuration

The JN0 configuration is supplied with a blank / no HIM arrangement.

This means that the drive does not include the enhanced local operator interface found on certain JN4 configurations.

This is not necessarily a disadvantage.

For a large industrial plant where the drive is controlled through a PLC, HMI or EtherNet/IP network, a local HIM may not be required.

The JN0 configuration can therefore be attractive when:

• Centralized control is preferred.
• The drive is installed inside a controlled electrical room.
• Local operator access is not required.
• Network-based monitoring is already available.
• The installation is part of a larger automated system.

For maintenance purposes, external configuration and diagnostic tools can still be used where appropriate.

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12. Input Configuration

The drive uses AC input with precharge.

The precharge function controls the initial charging of the internal DC-link capacitors when the drive is energized.

This is particularly important for a high-power drive because the internal DC-link capacitance is substantial.

Controlled precharge helps manage the initial electrical charging process.

The configuration also specifies no DC terminals.

Therefore, this particular model is intended for a conventional AC-input arrangement rather than a common-DC-bus architecture.

Projects requiring regenerative DC-bus operation should be evaluated using the appropriate drive configuration.

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13. Filtering

The 20G1AJF330JN0NNNNN is supplied with a filtered configuration.

Input filtering can be beneficial where electromagnetic compatibility and electrical-noise control are important.

This is particularly relevant in industrial plants containing:

• PLC systems.
• Sensitive instrumentation.
• Communication networks.
• Process-control equipment.
• Measurement systems.
• Multiple variable-frequency drives.

Proper grounding and cable installation remain important even when the drive includes filtering.

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14. Common-Mode Jumper

The configuration specifies that the common-mode jumper is installed.

The common-mode configuration can influence the drive’s grounding and common-mode behavior.

This should be considered together with:

• Motor-cable length.
• Cable shielding.
• Motor insulation.
• Grounding architecture.
• Electrical distribution system.
• EMC requirements.

Correct installation is particularly important for large 690 VAC motor systems.

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15. Dynamic Braking

The 20G1AJF330JN0NNNNN configuration does not include a dynamic-braking transistor.

This is an important selection detail.

Applications with high regenerative energy or rapid deceleration requirements may require a different braking strategy.

For example, systems with:

• High-inertia loads.
• Rapid stopping requirements.
• Frequent deceleration.
• Overhauling loads.
• Vertical movement.

may require additional evaluation.

If dynamic braking is required, the drive configuration should be selected accordingly.

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16. Enclosure Protection

The IP54 / NEMA Type 12 enclosure is one of the practical strengths of this configuration.

It provides protection appropriate for many industrial electrical rooms.

The enclosure helps protect internal components against dust and certain forms of incidental liquid exposure.

It is well suited to:

• Manufacturing plants.
• Process plants.
• Utility facilities.
• Water treatment plants.
• Material-handling facilities.
• Industrial MCC rooms.
• Large equipment rooms.

The enclosure does not eliminate the need to evaluate environmental conditions.

Corrosive gases, conductive dust, salt-laden environments, extreme humidity and high ambient temperatures may require additional engineering measures.

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17. Forced-Air Cooling

The 20G1AJF330JN0NNNNN uses forced-air cooling.

At 330 A, the power section generates significant heat during operation.

The cooling system removes heat from the power semiconductors and internal components.

Adequate ventilation is therefore essential.

The electrical room should be designed to remove the heat generated by the drive.

Cooling fans and airflow passages should be inspected as part of routine maintenance.

Particular attention should be paid to:

• Fan operation.
• Fan noise.
• Airflow restriction.
• Dust accumulation.
• Cabinet temperature.
• Cooling alarms.
• Signs of overheating.

Thermal management is one of the most important factors affecting the long-term reliability of a high-power VFD.

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18. Product Introduction

The Allen-Bradley 20G1AJF330JN0NNNNN PowerFlex 755 is a high-power industrial variable-frequency drive designed for large AC motors.

Its combination of:

• 690 VAC input.
• 330 A output.
• 355 kW Light-Duty capacity.
• 315 kW Normal-Duty capacity.
• 250 kW Heavy-Duty capacity.
• Frame 8 construction.
• IP54 / NEMA Type 12 enclosure.
• Forced-air cooling.
• Embedded EtherNet/IP.

provides a comprehensive platform for large motor-control systems.

The JN0 configuration is particularly appropriate for network-centric installations where the main control system handles drive operation and monitoring.

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19. Main Product Advantages

19.1 High-Power Motor Control

The 330 A output class allows the drive to control large industrial motors.

This makes it suitable for applications that would be beyond the practical range of compact VFDs.

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19.2 690 VAC Platform

The higher voltage class is particularly useful for large motor installations.

For a given power level, the higher voltage can reduce current requirements compared with lower-voltage systems.

This can help simplify large power-distribution arrangements.

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19.3 355 kW Light-Duty Capacity

The Light-Duty rating of approximately 355 kW provides substantial capacity for variable-torque applications.

Large fans and centrifugal pumps can be particularly suitable.

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19.4 315 kW Normal-Duty Capacity

The Normal-Duty rating of approximately 315 kW makes the drive suitable for a wide range of general industrial motor applications.

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19.5 250 kW Heavy-Duty Capacity

The Heavy-Duty rating provides an appropriate reference for more demanding constant-torque applications.

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19.6 High Short-Term Overload Capability

The drive can accommodate short-duration current increases.

This is useful during acceleration and temporary high-torque conditions.

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19.7 Embedded EtherNet/IP

Integrated network communication simplifies connection to modern industrial automation systems.

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19.8 IP54 / NEMA Type 12 Protection

The enclosed design provides better environmental protection than an open-type drive.

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19.9 Large Frame 8 Construction

The Frame 8 architecture is designed specifically for large industrial installations.

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19.10 JN0 Network-Centric Configuration

The no-HIM arrangement is useful when the drive is operated primarily from the plant automation system.

This avoids unnecessary local operator hardware when the application does not require it.

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20. Application: Large Pumps

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

A variable-frequency drive can regulate pump speed according to process demand.

Potential applications include:

• Water treatment.
• Industrial water circulation.
• Cooling-water systems.
• Large process pumps.
• Utility pumping.
• Chemical-process circulation.
• Irrigation systems.

Variable-speed control can help reduce the need to operate a pump continuously at full speed.

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21. Application: Large Fans

Large fans are another excellent application.

Fan systems often operate over a wide range of airflow requirements.

The drive can vary motor speed according to process demand.

Typical applications include:

• Industrial ventilation.
• Furnace fans.
• Cooling systems.
• Exhaust systems.
• Dust collection.
• Combustion-air systems.
• Process ventilation.

For variable-torque applications, the Light-Duty rating can provide substantial power capacity.

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22. Application: Large Blowers

Industrial blowers often require high motor power while maintaining controllable airflow.

The PowerFlex 755 can regulate blower speed according to process requirements.

Typical applications include:

• Process-air systems.
• Industrial exhaust.
• Combustion systems.
• Pneumatic material handling.
• Dust collection.
• Large ventilation systems.

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23. Application: Conveyors

The 20G1AJF330JN0NNNNN is well suited to large conveyor systems.

A conveyor can require substantial torque during startup, particularly when heavily loaded.

The drive can control acceleration and deceleration.

This can reduce mechanical shock on:

• Belts.
• Gearboxes.
• Shafts.
• Couplings.
• Rollers.
• Mechanical structures.

Network communication also makes it easier to coordinate multiple conveyors.

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24. Application: Mining and Bulk Material Handling

Large mining and material-handling equipment can require high motor power and substantial torque.

Potential applications include:

• Ore conveyors.
• Aggregate conveyors.
• Transfer conveyors.
• Material feeders.
• Crushers.
• Stockpile systems.
• Bulk handling equipment.

The high-power architecture is well suited to large rotating equipment.

The actual drive selection should be based on motor current, starting torque and mechanical load characteristics.

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25. Application: Compressors

Large industrial compressors can require several hundred kilowatts of motor power.

The PowerFlex 755 can provide variable-speed operation when the compressor is designed for this type of control.

Applications can include:

• Industrial air compressors.
• Process compressors.
• Utility compressors.
• Large refrigeration equipment.
• Process-gas systems.

Compressor manufacturers’ minimum-speed, maximum-speed and acceleration requirements should be considered.

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26. Application: Mixers

Large mixers and agitators can experience significant torque variation.

The drive can provide controlled acceleration and variable-speed operation.

Potential applications include:

• Chemical processing.
• Cement processing.
• Mineral processing.
• Slurry systems.
• Industrial batch processing.
• Large material mixing.

The Heavy-Duty rating should be considered when the mixer requires substantial continuous torque.

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27. Application: Process Machinery

The drive can also be used on large process machinery.

Potential applications include:

• Extruders.
• Large rollers.
• Material-processing machines.
• Production lines.
• Large rotating systems.
• Industrial processing equipment.

The embedded EtherNet/IP capability can be useful when motor speed must be coordinated with other production equipment.

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28. Application: Water and Utility Systems

Large water and utility systems often require high-power motor control.

Examples include:

• Water pumping.
• Cooling-water circulation.
• Large ventilation systems.
• Utility blowers.
• Industrial wastewater systems.
• Process-water systems.

The IP54 / NEMA Type 12 enclosure can also be beneficial in industrial utility rooms.

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29. Application Selection Guidelines

When selecting the 20G1AJF330JN0NNNNN, several factors should be evaluated.

Motor Rated Current

The motor nameplate current is one of the most important selection parameters.

The motor current should remain within the applicable drive rating for the selected duty class.

Motor Voltage

The motor must be suitable for the 690 VAC system.

Load Type

Determine whether the application is:

• Variable torque.
• Constant torque.
• Heavy duty.
• High inertia.
• Regenerative.

Acceleration Requirements

Large motors can require substantial acceleration time.

Starting Torque

High starting torque should be checked against the drive’s available current.

Operating Speed Range

The motor’s allowable operating speed should be considered.

Ambient Temperature

High ambient temperature can reduce available thermal capacity.

Installation Altitude

High-altitude installations may require additional thermal evaluation.

Motor Cable Length

Long cables can increase electrical stress and may require additional output-side considerations.

Harmonic Environment

The complete power system should be evaluated for harmonic requirements.

Network Requirements

EtherNet/IP architecture should be included in the control-system design.

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30. Mechanical Installation Requirements

The Frame 8 enclosure requires careful installation planning.

A useful reference size is:

2477 mm H × 600 mm W × 800 mm D

The basic drive weight is approximately:

644 kg

A configuration with additional option cabinets can be considerably heavier and wider.

The filtered arrangement can increase the effective depth to approximately 898 mm.

The installation area should therefore provide sufficient room for:

• Transportation.
• Lifting.
• Cable installation.
• Front-door opening.
• Maintenance.
• Cooling.
• Electrical access.
• Adjacent cabinet clearance.

The floor should be capable of supporting the equipment.

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31. Maintenance Considerations

The large power capacity of this drive makes preventive maintenance important.

Cooling fans should be inspected regularly.

Air passages should remain free of dust and obstructions.

Power terminals should be inspected according to the site’s maintenance schedule.

The cabinet should be checked for abnormal heating.

Technicians should monitor:

• Drive temperature.
• Motor current.
• Fault history.
• Fan condition.
• Communication status.
• Unusual vibration.
• Abnormal noise.
• Repeated overload events.
• Repeated drive trips.

A network-connected drive can also provide useful diagnostic information to maintenance personnel through the automation system.

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32. JN0 vs. JN4 Configuration

The JN0 and JN4 versions share the same basic high-power 690 VAC PowerFlex 755 platform.

The main practical difference is the operator-interface configuration.

Feature	20G1AJF330JN0NNNNN	20G1AJF330JN4NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	690 VAC	690 VAC
Current	330 A	330 A
Light Duty	355 kW	355 kW
Normal Duty	315 kW	315 kW
Heavy Duty	250 kW	250 kW
Frame	8	8
Enclosure	IP54 / NEMA Type 12	IP54 / NEMA Type 12
Cooling	Forced Air	Forced Air
EtherNet/IP	Yes	Yes
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed
Dynamic Braking	None	None
Local HIM	Blank / No HIM	Enhanced LCD / Full-Numeric HIM
Primary Advantage	Network-centric control	Local operation and maintenance

The JN0 configuration is generally more attractive when local operator-interface hardware is not required.

The JN4 configuration is more attractive when technicians need direct local access to drive parameters, status and diagnostics.

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33. Five Related Models from the Same Series

The following models are closely related to the target model and are useful for comparing current and power capacity within the same 690 VAC PowerFlex 755 family.

Model	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	Frame	Enclosure
20G1AJF265JN0NNNNN	690 VAC	265 A	315 kW	250 kW	200 kW	8	IP54 / Type 12
20G1AJF330JN0NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	8	IP54 / Type 12
20G1AJF370JN0NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	8	IP54 / Type 12
20G1AJF415JN0NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8	IP54 / Type 12
20G1AJF460JN0NNNNN	690 VAC	460 A	500 kW	450 kW	400 kW	8	IP54 / Type 12

This group provides a logical progression around the 330 A model.

The 20G1AJF265JN0NNNNN is the lower-current alternative.

The 20G1AJF330JN0NNNNN is the target model.

The 20G1AJF370JN0NNNNN provides additional current and power capacity.

The 20G1AJF415JN0NNNNN provides another step upward.

The 20G1AJF460JN0NNNNN is suitable when the motor current requirement approaches the 460 A class.

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34. Related Model Electrical Comparison

Model	Continuous Current	1-Minute Current	3-Second Current	Light Duty	Normal Duty	Heavy Duty
20G1AJF265JN0NNNNN	265 A	292 A	398 A	315 kW	250 kW	200 kW
20G1AJF330JN0NNNNN	330 A	363 A	495 A	355 kW	315 kW	250 kW
20G1AJF370JN0NNNNN	370 A	407 A	555 A	400 kW	355 kW	300 kW
20G1AJF415JN0NNNNN	415 A	457 A	623 A	450 kW	400 kW	355 kW
20G1AJF460JN0NNNNN	460 A	506 A	690 A	500 kW	450 kW	400 kW

The current progression makes these models useful for drive selection.

For example, if the motor’s continuous current is comfortably below 330 A and its overload requirement is moderate, the 330 A model may provide the appropriate balance.

If the motor requires substantially more current, the 370 A or 415 A versions may provide more suitable operating margin.

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35. Mechanical Comparison of Related Models

Model	Height	Width	Depth	Base Weight	Frame
20G1AJF265JN0NNNNN	2477 mm class	600 mm class	800 mm class	644 kg class	8
20G1AJF330JN0NNNNN	2477 mm class	600 mm class	800 mm class	644 kg class	8
20G1AJF370JN0NNNNN	2477 mm class	600 mm class	800 mm class	644 kg class	8
20G1AJF415JN0NNNNN	2477 mm class	600 mm class	800 mm class	644 kg class	8
20G1AJF460JN0NNNNN	2477 mm class	600 mm class	800 mm class	644 kg class	8

These values represent the common Frame 8 cabinet class.

The exact final dimensions can vary with options and cabinet arrangements.

For projects requiring precise installation planning, the specific dimensional drawing should be used.

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36. Five Other Popular Allen-Bradley Models

The following products provide useful comparisons across other drive families and power levels.

Model	Series	Voltage	Current	Power Rating	Frame	Enclosure	Main Application
25B-D030N114	PowerFlex 525	380…480 VAC	30 A	20 HP ND / 15 HP HD	D	IP20	Compact machine control
25C-D030N114	PowerFlex 527	380…480 VAC	30 A	20 HP ND / 15 HP HD	D	IP20	Networked machine control
20F1AND302JA0NNNNN	PowerFlex 753	480 VAC	302 A	250 HP ND / 200 HP HD	7	IP20/IP00	Large industrial motor control
20G1AJE460JN4NNNNN	PowerFlex 755	600 VAC	460 A	500 HP LD / 500 HP ND / 400 HP HD	8	IP54 / Type 12	Large industrial motors
20G1AJF415JN4NNNNN	PowerFlex 755	690 VAC	415 A	450 kW LD / 400 kW ND / 355 kW HD	8	IP54 / Type 12	High-power industrial motors

These five models cover a wide range of applications.

The 25B-D030N114 is intended for compact machinery and is much smaller than the target drive.

The 25C-D030N114 is also a compact drive but is particularly useful where dual-port EtherNet/IP and integrated safety functions are important.

The 20F1AND302JA0NNNNN belongs to the PowerFlex 753 family and provides a useful comparison at the lower-voltage, high-power level.

The 20G1AJE460JN4NNNNN is a 600 VAC PowerFlex 755 configuration and is useful when the motor system operates at 600 VAC rather than 690 VAC.

The 20G1AJF415JN4NNNNN is a close 690 VAC PowerFlex 755 alternative with a higher current rating than the target model.

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37. Popular Model Comparison

Model	Best Application	Main Strength	Relative Size
25B-D030N114	Compact machines	Small size and integrated EtherNet/IP	Small
25C-D030N114	Automated machines	Network integration and safety	Small
20F1AND302JA0NNNNN	Large industrial systems	High-power 480 VAC control	Large
20G1AJE460JN4NNNNN	Large 600 VAC motors	High-current PowerFlex 755 platform	Very Large
20G1AJF415JN4NNNNN	Large 690 VAC motors	High-power 690 VAC control	Very Large

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38. 20G1AJF330JN0NNNNN vs. 20G1AJF265JN0NNNNN

Parameter	20G1AJF330JN0NNNNN	20G1AJF265JN0NNNNN
Voltage	690 VAC	690 VAC
Current	330 A	265 A
Light Duty	355 kW	315 kW
Normal Duty	315 kW	250 kW
Heavy Duty	250 kW	200 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
EtherNet/IP	Yes	Yes
HIM	No HIM	No HIM
Main Difference	Higher current and power	Lower current and power

The 330 A model should be selected when the motor requires more current or when additional operating margin is required.

The 265 A model can be more appropriate when the motor load comfortably fits within its rating.

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39. 20G1AJF330JN0NNNNN vs. 20G1AJF370JN0NNNNN

Parameter	20G1AJF330JN0NNNNN	20G1AJF370JN0NNNNN
Voltage	690 VAC	690 VAC
Current	330 A	370 A
Light Duty	355 kW	400 kW
Normal Duty	315 kW	355 kW
Heavy Duty	250 kW	300 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
EtherNet/IP	Yes	Yes
HIM	No HIM	No HIM
Main Difference	Lower capacity	Higher capacity

The 370 A version is a logical step upward when the motor current approaches or exceeds the practical range of the 330 A model.

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40. Why Choose the 20G1AJF330JN0NNNNN

The strongest reason to choose the 20G1AJF330JN0NNNNN is the balance between high motor capacity and a practical 690 VAC industrial architecture.

The drive provides enough capacity for large motors without moving immediately into the substantially larger current ranges of the 370 A, 415 A or 460 A models.

Its 315 kW Normal-Duty rating makes it suitable for a wide range of large industrial machinery.

The 355 kW Light-Duty rating makes it especially useful for variable-torque applications.

The 250 kW Heavy-Duty rating provides a reference for higher-torque applications.

The IP54 / NEMA Type 12 enclosure provides industrial environmental protection.

The embedded EtherNet/IP interface supports network-based control and monitoring.

The JN0 configuration keeps the drive focused on network-centric operation without including a local HIM.

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41. Advantages in Centralized Automation Systems

The JN0 configuration is particularly well suited to centralized automation systems.

A typical installation may have:

• PLC control.
• HMI supervision.
• EtherNet/IP communication.
• Centralized fault monitoring.
• Remote parameter management.
• Multiple networked drives.

In such a system, a local keypad may not be necessary.

The drive can instead function as a networked motor-control node.

This can be advantageous in large production facilities where the control room provides the primary operator interface.

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42. Advantages for Maintenance

Although the JN0 version does not include a local HIM, the PowerFlex 755 architecture still provides extensive diagnostic capability through the drive’s control and communication system.

Maintenance personnel can use the control system or suitable external tools to investigate:

• Fault conditions.
• Drive status.
• Motor current.
• Speed.
• Operating parameters.
• Communication status.
• Warning conditions.

This can be especially useful when many drives are distributed throughout a large facility.

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43. Power Distribution Considerations

The 690 VAC, 330 A drive requires a properly engineered power-distribution system.

Important considerations include:

• Transformer sizing.
• Incoming circuit protection.
• Short-circuit current.
• Cable ampacity.
• Grounding.
• Motor cable construction.
• Harmonic performance.
• EMC requirements.
• Motor insulation.
• Disconnect arrangements.
• Safety circuits.

The drive should be treated as part of the overall electrical system rather than as an isolated component.

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44. Motor Compatibility

The motor should be designed for the applicable 690 VAC system.

The following should be checked:

• Motor rated voltage.
• Motor rated current.
• Motor power.
• Motor speed.
• Motor service factor.
• Motor insulation system.
• Minimum operating speed.
• Maximum operating speed.
• Starting torque.
• Continuous torque.
• Overload requirements.

For high-power motors, VFD suitability is particularly important.

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45. Thermal Considerations

The 20G1AJF330JN0NNNNN is a large air-cooled drive.

The electrical room must be able to remove the heat generated during operation.

This means that HVAC and ventilation calculations should consider the drive’s losses.

If multiple large drives are installed in the same room, the combined heat output can become significant.

The cooling design should therefore consider:

• Number of drives.
• Motor loading.
• Ambient temperature.
• Airflow.
• Room volume.
• Ventilation capacity.
• Filter condition.
• Seasonal temperature changes.

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46. Installation Environment

The IP54 / NEMA Type 12 enclosure makes the drive suitable for many industrial environments.

Typical locations include:

• Electrical rooms.
• MCC rooms.
• Process plants.
• Manufacturing plants.
• Utility buildings.
• Water treatment facilities.
• Material-handling facilities.

The drive should not be installed without environmental review in areas containing severe corrosive gases, conductive dust or extreme moisture.

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47. Preventive Maintenance Checklist

A practical maintenance program for this drive should include:

Maintenance Item	Recommended Inspection
Cooling Fans	Check operation and abnormal noise
Airflow	Check for blockage
Cabinet	Inspect cleanliness
Power Connections	Inspect according to maintenance schedule
Grounding	Verify integrity
Motor Cables	Inspect insulation and termination
Network	Check EtherNet/IP communication
Fault History	Review repeated faults
Motor Current	Check for abnormal changes
Cabinet Temperature	Monitor for overheating
Enclosure	Check seals and physical condition
Internal Components	Inspect for visible thermal stress
Control System	Verify command and feedback operation

The maintenance interval should be adjusted according to the actual operating environment.

A clean electrical room and a dusty bulk-material facility place very different demands on the same drive.

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48. Overall Technical Assessment

The Allen-Bradley 20G1AJF330JN0NNNNN is a high-power PowerFlex 755 AC Drive designed for large industrial motor-control systems.

Its principal electrical characteristics are:

• 690 VAC.
• Three-phase input.
• 330 A output current.
• 355 kW Light-Duty rating.
• 315 kW Normal-Duty rating.
• 250 kW Heavy-Duty rating.
• Frame 8.
• Forced-air cooling.
• IP54 / NEMA Type 12 enclosure.
• Embedded EtherNet/IP.
• AC input with precharge.
• No DC terminals.
• Filtered input.
• Common-mode jumper installed.
• No dynamic-braking transistor.
• Blank / No HIM.

This combination makes the drive particularly appropriate for large industrial pumps, fans, blowers, conveyors, compressors, mixers, process machines and material-handling equipment.

The 690 VAC platform is especially valuable for large motor installations where high motor power must be handled with a manageable current level.

The JN0 configuration is a good fit for network-centric automation architectures.

For applications requiring local operator access, a related JN4 configuration can be considered.

For larger motor-current requirements, the 370 A, 415 A and 460 A models provide progressively higher capacity within the same 690 VAC PowerFlex 755 family.

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49. Final Product Specification Table

Parameter	Specification
Brand	Allen-Bradley
Series	PowerFlex 755
Model	20G1AJF330JN0NNNNN
Product Type	High-Power Air-Cooled AC Drive
Input Voltage	690 VAC
Input Phase	Three Phase
Input Frequency	50/60 Hz class
Output Current	330 A
Light-Duty Current	370 A continuous
Light-Duty 1-Minute	407 A
Light-Duty Power	355 kW
Normal-Duty Current	330 A continuous
Normal-Duty 1-Minute	363 A
Normal-Duty 3-Second	495 A
Normal-Duty Power	315 kW
Heavy-Duty Current	265 A continuous
Heavy-Duty 1-Minute	292 A
Heavy-Duty 3-Second	398 A
Heavy-Duty Power	250 kW
Frame	8
Cooling	Forced Air
Enclosure	IP54 / NEMA 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. Base Drive Weight	644 kg
Approx. Weight with Option Cabinets	Up to approximately 1166 kg depending on configuration
Input Type	AC Input with Precharge
DC Terminals	None
Communication	Embedded EtherNet/IP
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Local HIM	Blank / No HIM
Mounting	Floor-Mounted
Main Application	Large Industrial Motor Control

50. Final Recommendation

The 20G1AJF330JN0NNNNN is a strong choice for large industrial motor applications requiring a 690 VAC, 330 A PowerFlex 755 platform.

Its 315 kW Normal-Duty rating makes it suitable for a wide range of industrial machinery, while the 355 kW Light-Duty rating provides additional capacity for suitable variable-torque applications.

The 250 kW Heavy-Duty rating provides a practical selection point for higher-torque machinery.

The IP54 / NEMA Type 12 Frame 8 enclosure makes it suitable for centralized industrial electrical installations.

The embedded EtherNet/IP interface makes it a natural fit for networked automation systems.

The JN0 no-HIM configuration is particularly appropriate when the drive is expected to be operated and monitored through the plant control system rather than by a local keypad.

For applications requiring more current, the 370 A, 415 A and 460 A PowerFlex 755 models are logical related choices.

For applications requiring less power, the 265 A version can provide a more closely matched drive rating.

Overall, the 20G1AJF330JN0NNNNN is best suited to large pumps, fans, blowers, conveyors, compressors, mixers, material-handling systems and other large industrial motor applications where high-voltage operation, enclosed construction, network communication and substantial power capacity are required.