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20G11JF1K4JN0NNNNN PowerFlex 755 High-Power AC Drive

1. Product Overview

The 20G11JF1K4JN0NNNNN is a high-power air-cooled AC variable frequency drive belonging to the PowerFlex 755 series under the Allen-Bradley brand.

It is designed for large industrial motor-control applications where conventional low-power variable frequency drives are not sufficient. With a 690 VAC three-phase electrical class, approximately 1,400 A current rating, 1,400 kW Normal Duty capacity and 1,120 kW Heavy Duty capacity, this model is intended for large pumps, fans, compressors, conveyors, crushers, mills and other high-power process machinery.

The model is a Frame 10 configuration and uses a large industrial enclosure arrangement with an 800 mm depth. It is air cooled and uses forced-air thermal management to handle the substantial heat generated by its high-power semiconductor section.

The configuration also incorporates EtherNet/IP communication, EMC filtering, AC input with precharge and DC terminals, Type 12/IP54 protection, and no internal dynamic braking transistor.

Compared with smaller PowerFlex 755 models, the 20G11JF1K4JN0NNNNN is positioned toward the very high-power end of the family. It is therefore particularly suitable for applications where the motor itself can be several hundred kilowatts to more than one megawatt.

For equipment selection, the most important factors are not only the motor’s rated kW but also the motor voltage, full-load current, duty cycle, overload requirements, acceleration time, deceleration requirements, load inertia and operating environment.

2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product family	PowerFlex
Product series	PowerFlex 755
Product type	High-power AC variable frequency drive
Model	20G11JF1K4JN0NNNNN
Drive type	Air-cooled AC drive
Frame	Frame 10
Voltage class	690 VAC
Input	Three-phase AC
Current class	1,400 A
Normal Duty power	1,400 kW
Heavy Duty power	1,120 kW
Light Duty power	Approximately 1,500 kW class
Enclosure	Type 12 / IP54 configuration
Cabinet depth	800 mm
Cooling	Forced air
Communication	Embedded EtherNet/IP
Input arrangement	AC input with precharge and DC terminals
Filtering	Filtered
Common-mode capacitor jumper	Installed
Dynamic braking	None
HIM	Blank / no HIM configuration
Application class	Large industrial motor control

The most important identifying characteristics of this particular configuration are the 690 V electrical class, 1,400 A class, 1,400 kW Normal Duty rating, Frame 10 construction and 800 mm MCC-style depth.

3. Detailed Technical Parameters

Parameter	Specification
Model	20G11JF1K4JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product category	AC Variable Frequency Drive
Drive construction	Air cooled
Input voltage	690 VAC
Input phase	Three phase
Nominal current	1,400 A
Normal Duty power	1,400 kW
Heavy Duty power	1,120 kW
Light Duty power	Approximately 1,500 kW
Normal Duty current	1,400 A class
Heavy Duty current	Approximately 1,160 A class
Light Duty current	Approximately 1,485 A class
Input frequency	50/60 Hz class, application dependent
Output	Variable-frequency AC output
Input type	AC input with precharge and DC terminals
Precharge	Yes
DC terminals	Yes
Frame	Frame 10
Cooling	Forced air
Enclosure	Type 12
Protection level	IP54
Cabinet depth	800 mm
Cabinet arrangement	MCC style
Communication	Embedded EtherNet/IP
Filtering	Filtered
Common-mode capacitor jumper	Installed
Dynamic braking	None
Internal braking transistor	Not included
HIM	Blank / no HIM
Main function	Variable-speed motor control
Motor control	Speed and torque control
Typical motor range	Large industrial motors
Installation type	Industrial floor-mounted cabinet arrangement
Dimensions	Large Frame 10 / MCC-style configuration; 800 mm nominal depth; final height and width depend on the complete enclosure arrangement
Weight (kg)	Exact complete-unit weight depends on the final cabinet and installed configuration; confirm the actual shipping/mechanical configuration before lifting or transportation
Cooling requirement	High-volume forced-air cooling
Main application	Large pumps, fans, conveyors, compressors, crushers, mills and process machinery

For a drive of this size, it is important to distinguish the electrical catalog configuration from the final physical assembly. The 800 mm depth is associated with the large MCC-style configuration, while the final cabinet height, width and complete shipping weight can depend on the physical arrangement and installed equipment.

For that reason, a single estimated weight in kg should not be treated as the guaranteed shipping weight of every installation. The actual mechanical drawing and shipping documentation should be used for foundation, transportation and lifting calculations.

4. Electrical Performance

The 20G11JF1K4JN0NNNNN is a 690 VAC high-power drive.

Its nominal Normal Duty rating is approximately 1,400 kW, placing it in the megawatt-class motor-control category.

The Heavy Duty rating is approximately 1,120 kW.

This distinction is important because the maximum motor power that can be connected to a drive depends on the operating duty.

Duty classification	Approximate power rating	Approximate current class	Typical application
Light Duty	1,500 kW	1,485 A class	Less demanding overload profile
Normal Duty	1,400 kW	1,400 A	General high-power industrial loads
Heavy Duty	1,120 kW	1,160 A class	Higher torque and demanding overload applications

A common mistake in drive selection is to look only at the largest kW number printed in the product specifications.

For example, a machine with a 1,200 kW motor should not automatically be considered suitable simply because the drive has a 1,500 kW Light Duty rating.

If the machine requires Heavy Duty operation, the relevant capacity may be closer to the 1,120 kW Heavy Duty rating.

The actual motor nameplate current should therefore be checked against the appropriate duty rating before final selection.

5. Product Introduction

The PowerFlex 755 series is intended for industrial applications where motor speed, torque and acceleration need to be controlled electronically.

The drive works by receiving electrical power from the plant’s AC distribution system and producing controlled electrical output for the motor.

Instead of allowing a motor to operate only at a fixed speed, the drive can vary the motor’s operating frequency and voltage according to the process requirement.

This provides a much wider operating range than a conventional direct-on-line motor starter.

For a large industrial process, this can provide several practical advantages.

The motor can start more smoothly.

The motor can accelerate according to a defined ramp.

The motor can operate at different speeds.

The motor can be stopped in a controlled manner.

The motor can be integrated into a plant-wide automation system.

The motor’s operating data can be monitored.

The process can respond more accurately to changing production requirements.

6. What the 20G11JF1K4JN0NNNNN Is Designed For

This model is designed for applications where the motor power is large enough to require a high-current, high-power industrial drive.

Typical equipment includes:

• Large water pumps
• Cooling-water pumps
• Process pumps
• Large fans
• Industrial blowers
• Large compressors
• Mining conveyors
• Bulk material conveyors
• Crushers
• Grinding mills
• Cement machinery
• Steel-processing machinery
• Pulp and paper equipment
• Large process machinery
• Industrial ventilation equipment
• Heavy material-handling equipment

7. Application 1 — Large Pumps

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

Many industrial pumping systems do not operate at the same flow rate throughout the entire production cycle.

If a pump is operated at full speed while the process requires only partial flow, mechanical throttling can be used, but this can introduce unnecessary losses.

A variable frequency drive allows the motor speed to be adjusted instead.

For example, a process may require high flow during one production stage and lower flow during another.

The drive can change the motor speed accordingly.

This can improve process control and may reduce energy consumption where the pump system has suitable variable-speed characteristics.

8. Application 2 — Large Fans and Blowers

Large fans and blowers are also excellent candidates.

Typical applications include:

• Furnace ventilation
• Industrial exhaust
• Dust extraction
• Cooling systems
• Combustion-air systems
• Mine ventilation
• Process ventilation
• Large air-handling systems

Instead of operating the motor continuously at maximum speed, the drive can adjust motor speed to match the required airflow.

This can provide better control over the process and may reduce unnecessary energy consumption.

9. Application 3 — Compressors

Large compressors can require hundreds or thousands of kilowatts of motor power.

A high-power variable frequency drive can be used where the compressor is approved for variable-speed operation.

The drive can help control motor speed according to process demand.

Potential applications include:

• Industrial compressed air
• Process gas
• Chemical processing
• Gas handling
• Petrochemical equipment
• Large process compressors
• Certain refrigeration-related compressor systems

Compressor applications should receive special engineering attention because the allowable operating speed range depends on the compressor design.

10. Application 4 — Conveyors

Large conveyors can place substantial demands on their drive motors.

Mining conveyors and bulk-material conveyors can be especially demanding.

The 20G11JF1K4JN0NNNNN can provide controlled motor acceleration rather than applying full electrical and mechanical stress immediately.

Controlled acceleration can help reduce mechanical shock.

Potential benefits include reduced stress on:

• Gearboxes
• Couplings
• Shafts
• Bearings
• Conveyor belts
• Mechanical joints

The drive can also help coordinate conveyor speed with upstream and downstream equipment.

11. Application 5 — Crushers

Large crushers require significant motor torque and power.

A high-power drive can provide controlled acceleration and speed regulation.

This can be particularly useful when the crusher has changing load conditions.

Typical applications include:

• Primary crushers
• Secondary crushers
• Mineral processing
• Aggregate equipment
• Mining machinery
• Heavy material-processing equipment

12. Application 6 — Mills and Grinding Equipment

Large mills can have very high motor power requirements.

A variable-frequency drive can provide controlled acceleration, adjustable operating speed and integration with the process-control system.

Typical applications include:

• Grinding mills
• Ball mills
• Cement mills
• Mineral-processing mills
• Heavy material-processing equipment

13. Application 7 — Steel, Cement and Heavy Manufacturing

Large industrial plants often contain many motors in the several-hundred-kilowatt or megawatt range.

In these facilities, variable-speed drives can become an important part of the production system.

The drive can be used to control process speed, coordinate multiple machines and respond to changing production requirements.

This makes the product particularly suitable for heavy industrial applications where the motor represents a significant portion of the plant’s electrical load.

14. Main Product Advantages

14.1 Megawatt-Class Power

The most obvious advantage is its very high power capacity.

At approximately 1,400 kW Normal Duty, the product is capable of controlling motors at a scale far beyond ordinary industrial drives.

This makes it appropriate for major process equipment.

14.2 690 VAC Electrical Class

The 690 VAC class is particularly suitable for large industrial motor systems.

Higher motor voltage allows very large motor power to be handled at a current level that is more practical for industrial electrical distribution than an equivalent lower-voltage arrangement.

For a 1.4 MW motor, electrical current is already very substantial.

The 690 V platform therefore provides a practical high-power motor-control architecture.

14.3 High Current Capacity

The approximately 1,400 A current class is another major advantage.

Large pumps, compressors, fans and conveyors can require very high motor current.

The 20G11JF1K4JN0NNNNN is specifically designed for these demanding applications.

14.4 Flexible Duty Ratings

The availability of multiple duty classifications allows the drive to be selected according to the actual load profile.

Duty	Approximate rating	Best suited to
Light Duty	1,500 kW	Less demanding overload requirements
Normal Duty	1,400 kW	General industrial operation
Heavy Duty	1,120 kW	High torque and demanding overload

This is particularly useful in applications where motor power alone does not adequately describe the load.

14.5 Embedded EtherNet/IP

Embedded EtherNet/IP allows the drive to become part of a networked automation system.

Typical information available to the control system can include:

• Motor speed
• Output current
• Drive status
• Fault status
• Alarm information
• Speed reference
• Start command
• Stop command
• Operating condition
• Diagnostic information

This can simplify the control architecture and improve access to drive information.

14.6 Forced-Air Cooling

A high-power drive produces substantial heat.

The forced-air cooling system is therefore an essential part of the product’s design.

Correct ventilation is important for maintaining stable operating temperatures.

Cooling-air passages should be kept clear, and the installation should provide sufficient space for airflow and maintenance.

14.7 Type 12 / IP54 Protection

The Type 12/IP54 enclosure arrangement is appropriate for many industrial indoor environments.

It provides a significantly more enclosed configuration than an open-frame drive.

However, it should still be installed within an environment compatible with the product’s temperature, humidity, dust and contamination limits.

14.8 Large MCC-Style Construction

The 800 mm deep MCC-style configuration is intended for large industrial electrical installations.

This provides a practical arrangement for integrating a very high-power drive into a substantial motor-control system.

The trade-off is physical size.

This is not a compact drive that can simply be mounted inside a small control panel.

15. Input and DC-Bus Configuration

The model uses an AC input with precharge and DC terminals.

The precharge circuit is important for managing the initial charging of the drive’s DC bus.

The DC terminals also provide additional flexibility for applications that need access to the DC bus as part of the overall drive-system architecture.

This configuration is different from versions that use an AC input without DC terminals.

16. Filtering and Common-Mode Configuration

The 20G11JF1K4JN0NNNNN uses a filtered configuration with the common-mode capacitor jumper installed.

This is an important feature when considering electromagnetic compatibility and system grounding.

The configuration can influence the behavior of common-mode currents and electrical noise.

This should be considered together with:

• Motor cable length
• Motor insulation
• Grounding system
• Cable shielding
• Plant electrical architecture
• EMC requirements

For a large industrial installation, these issues should be evaluated during system design rather than after commissioning.

17. Dynamic Braking

This model has no internal dynamic braking transistor.

This is an important consideration for machines with large rotating inertia.

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

If the application requires rapid deceleration, the system must have an appropriate method for managing this energy.

Applications that deserve particular attention include:

• Large fans
• High-inertia conveyors
• Centrifugal machines
• Large rotating equipment
• Heavy mechanical loads

The absence of internal dynamic braking does not mean the drive cannot be used on such equipment.

It means that the braking and regenerative-energy strategy must be considered separately at the system level.

18. Dimensions and Weight

The physical size of a drive in this class is an important engineering consideration.

Mechanical parameter	Specification
Model	20G11JF1K4JN0NNNNN
Frame	Frame 10
Enclosure style	Type 12 / IP54
Cabinet depth	800 mm
Mounting arrangement	MCC-style / floor-mounted industrial arrangement
Overall height	Large cabinet configuration; confirm final mechanical drawing
Overall width	Depends on final cabinet arrangement
Approximate installation envelope	Large industrial MCC-style enclosure
Weight (kg)	Final complete-unit weight is configuration dependent and should be confirmed from the actual mechanical/shipping documentation
Transportation	Requires appropriate industrial handling equipment
Lifting	Use the approved lifting arrangement for the actual assembled equipment
Service access	Substantial working space should be provided
Cable routing	Large power-cable routing area required
Cooling clearance	Adequate airflow and service clearance required

The 800 mm depth is an important dimensional characteristic.

However, the final height and width can depend on the physical cabinet arrangement.

The same principle applies to weight.

For a very large drive, the electrical catalog number should not be used to estimate the exact shipping weight of a complete cabinet.

The correct value for Weight (kg) should be taken from the final mechanical drawing, shipping documentation or equipment data supplied for the exact physical assembly.

19. Installation Considerations

A drive of this size requires careful installation planning.

The electrical room should provide enough space for:

• Incoming power cables
• Motor cables
• Control wiring
• Communication wiring
• Cooling airflow
• Maintenance access
• Inspection
• Safe operation
• Lifting and replacement activities

The cabinet should also be installed on a suitable foundation.

Because the unit can be very heavy, floor loading should be considered during project design.

20. Cooling and Thermal Management

Thermal management is particularly important for a 1.4 MW-class drive.

The drive uses forced-air cooling.

During operation, the power semiconductor devices produce heat.

If airflow becomes restricted, internal temperature can increase.

Potential causes of cooling problems include:

• Blocked air passages
• Dirty filters
• Failed fans
• Excessive ambient temperature
• Incorrect cabinet spacing
• Poor room ventilation
• High-altitude operation without appropriate consideration

For long-term reliability, the cooling system should be included in the regular maintenance program.

21. Maintenance Recommendations

A high-power drive should be treated as a major plant asset.

Regular inspection should include:

Maintenance item	Purpose
Cooling fans	Confirm proper airflow
Air passages	Prevent overheating
Power connections	Check for abnormal heating or loose connections
Ground connections	Maintain electrical safety
Cabinet interior	Check contamination
Communication wiring	Maintain network reliability
Drive alarms	Detect developing problems
Fault history	Assist troubleshooting
Mechanical condition	Detect vibration or damage
Environmental conditions	Maintain suitable operating conditions

Preventive maintenance is particularly important for high-power drives because an unexpected failure can affect a major portion of a production line.

22. Five Recommended Models from the Same PowerFlex 755 Series

The following models are useful alternatives or comparison models within the same high-power PowerFlex 755 family.

Model	Voltage	Current class	Light Duty	Normal Duty	Heavy Duty	Frame	Cooling	Depth / enclosure
20G11JF1K4JN0NNNNN	690 VAC	1,400 A	1,500 kW	1,400 kW	1,120 kW	10	Air cooled	800 mm / Type 12-IP54
20G11JF1K0JN0NNNNN	690 VAC	1,040 A	1,100 kW class	1,000 kW	900 kW	10	Air cooled	800 mm / Type 12-IP54
20G11JF960JN0NNNNN	690 VAC	High-current Frame 9 class	1,000 kW class	900 kW	800 kW class	9	Air cooled	Industrial enclosure
20G11JF795JN0NNNNN	690 VAC	High-current Frame 9 class	900 kW class	800 kW	710 kW class	9	Air cooled	Industrial enclosure
20G11JF710JN0NNNNN	690 VAC	High-current Frame 9 class	800 kW class	710 kW	590 kW class	9	Air cooled	Industrial enclosure

These models are useful when the motor power is lower than the 1.4 MW Normal Duty capacity of the target model.

The 20G11JF1K0JN0NNNNN is particularly close in application concept and voltage class, while the lower-current Frame 9 configurations are more suitable for progressively smaller 690 V motors.

23. Same-Series Model Comparison

Characteristic	20G11JF1K4JN0NNNNN	20G11JF1K0JN0NNNNN	20G11JF960JN0NNNNN	20G11JF795JN0NNNNN	20G11JF710JN0NNNNN
Voltage	690 VAC	690 VAC	690 VAC	690 VAC	690 VAC
Current class	1,400 A	1,040 A	Lower than target	Lower than target	Lower than target
ND power	1,400 kW	1,000 kW	900 kW class	800 kW	710 kW
HD power	1,120 kW	900 kW	800 kW class	710 kW	590 kW class
Frame	10	10	9	9	9
Cooling	Air cooled	Air cooled	Air cooled	Air cooled	Air cooled
Typical positioning	Very high power	High power	Large industrial	Large industrial	Medium-large industrial
Best use	1.4 MW-class systems	Around 1 MW systems	Around 0.9 MW systems	Around 0.8 MW systems	Around 0.7 MW systems

This group gives a practical progression from approximately 710 kW to 1,400 kW Normal Duty.

The correct model should be selected according to motor current and duty requirements rather than simply selecting the largest available drive.

24. Five Representative Popular Models Under the Same Brand

The following models provide useful comparison points across different voltage classes and PowerFlex 755 configurations.

Model	Series	Voltage	Power class	Current class	Frame	Cooling	Typical application
20G11JF1K4JN0NNNNN	PowerFlex 755	690 VAC	1,400 kW ND	1,400 A	10	Air cooled	Very large process motors
20G11JF1K0JN0NNNNN	PowerFlex 755	690 VAC	1,000 kW ND	1,040 A	10	Air cooled	Large pumps, fans, compressors
20G11JD1K4JN0NNNNN	PowerFlex 755	480 VAC	1,250 HP ND class	1,420 A class	10	Air cooled	Large 480 V motors
20G11JE1K4JN0NNNNN	PowerFlex 755	600 VAC	1,400 HP ND class	1,430 A class	10	Air cooled	Large 600 V motors
20G11JC1K4JN0NNNNN	PowerFlex 755	400 VAC class	800 kW ND class	1,465 A class	10	Air cooled	Large lower-voltage motors

These models demonstrate the breadth of the PowerFlex platform.

The key distinction is the motor voltage.

A 690 V motor should be paired with the appropriate 690 V configuration.

A 480 V motor requires the corresponding 480 V configuration.

A 600 V motor requires the corresponding 600 V configuration.

Voltage compatibility should therefore be checked before comparing power ratings.

25. Popular Model Comparison

Model	Voltage	Normal Duty power	Heavy Duty power	Current class	Best application
20G11JF1K4JN0NNNNN	690 VAC	1,400 kW	1,120 kW	1,400 A	Very large 690 V motors
20G11JF1K0JN0NNNNN	690 VAC	1,000 kW	900 kW	1,040 A	Large 690 V motors
20G11JD1K4JN0NNNNN	480 VAC	1,250 HP class	1,000 HP class	1,420 A class	Large 480 V motors
20G11JE1K4JN0NNNNN	600 VAC	1,400 HP class	1,250 HP class	1,430 A class	Large 600 V motors
20G11JC1K4JN0NNNNN	400 V class	800 kW	630 kW	1,465 A class	Large lower-voltage motors

The target model remains the strongest choice in this group when the motor system is based on 690 VAC and requires approximately 1.4 MW Normal Duty capacity.

26. Product Advantages by Application

Application	Main advantage
Large pump	Variable flow and pressure control
Cooling pump	Adjustable process flow
Large fan	Variable airflow
Blower	Speed control
Compressor	Adjustable motor operating point
Conveyor	Controlled acceleration
Crusher	High-power motor control
Grinding mill	Speed and torque management
Cement equipment	Large motor capacity
Mining equipment	High-current motor control
Steel equipment	Heavy industrial motor operation
Process machinery	Integration with automation systems

The product is most effective when the motor is a major part of the process and variable speed provides a meaningful operational benefit.

27. Energy-Saving Potential

One of the most attractive reasons for using a variable frequency drive is the possibility of reducing energy consumption.

This is especially relevant to centrifugal pumps and fans.

The amount of energy saved depends heavily on the operating point.

A pump that runs continuously at maximum speed even when the process requires only a fraction of its capacity can waste considerable energy.

By reducing motor speed, the drive can bring the pump or fan closer to the actual process requirement.

However, energy savings should always be calculated from the specific equipment and operating profile.

Factors include:

• Motor efficiency
• Pump efficiency
• Fan efficiency
• System resistance
• Operating hours
• Required flow
• Required pressure
• Speed range
• Production schedule

28. Mechanical Benefits

Large industrial motors can produce considerable mechanical shock during direct starting.

A variable frequency drive can provide a controlled acceleration ramp.

This can reduce sudden mechanical loading on the machine.

Potential benefits include:

• Lower starting shock
• Reduced belt stress
• Reduced coupling stress
• Reduced gearbox stress
• Smoother conveyor starting
• Better process synchronization
• Improved speed control

For heavy machinery, these mechanical benefits can be just as important as energy savings.

29. Automation and Communication Advantages

The integrated EtherNet/IP capability allows the drive to communicate with the broader automation system.

A control system can use drive information for:

• Start and stop control
• Speed reference
• Current monitoring
• Fault detection
• Alarm handling
• Production monitoring
• Maintenance diagnostics
• Process interlocking

This can make the drive an active part of the automation architecture rather than a standalone power-control device.

30. Safety and Engineering Considerations

A drive operating at approximately 690 VAC and 1,400 A represents a very high-energy electrical system.

Installation and maintenance should therefore be carried out by appropriately qualified personnel.

Important engineering areas include:

• Electrical isolation
• Protective grounding
• Short-circuit protection
• Motor protection
• Cable selection
• Cabinet ventilation
• Safe access
• Maintenance procedures
• Emergency stopping
• Braking strategy
• Environmental conditions

The high current level means that electrical connections, bus structures and cable arrangements require particular attention.

31. Motor Selection Guidance

Before purchasing this drive, the motor nameplate should be checked.

Motor parameter	Recommended check
Motor voltage	Confirm approximately 690 VAC compatibility
Motor current	Compare directly with drive duty rating
Motor power	Compare with LD/ND/HD rating
Frequency	Confirm required operating frequency
Speed	Confirm minimum and maximum operating speed
Torque	Check starting and continuous torque
Overload	Determine required overload capability
Acceleration	Determine required acceleration time
Deceleration	Determine required stopping time
Inertia	Important for high-inertia loads
Duty cycle	Select LD/ND/HD correctly
Environment	Confirm temperature, altitude and contamination
Motor cable	Check length and installation conditions

For a large motor, the nameplate current is generally more important than simply comparing kW values.

32. Target Model vs. 20G11JF1K0JN0NNNNN

Parameter	20G11JF1K4JN0NNNNN	20G11JF1K0JN0NNNNN
Voltage	690 VAC	690 VAC
Current	1,400 A	1,040 A
Normal Duty	1,400 kW	1,000 kW
Heavy Duty	1,120 kW	900 kW
Frame	10	10
Cooling	Air cooled	Air cooled
Depth	800 mm	800 mm
Enclosure	Type 12/IP54	Type 12/IP54
Application	Very large motors	Large motors
Relative capacity	Higher	Lower

The 1K4 configuration provides a substantial increase in capacity.

If the motor requires around 1 MW, the 1K0 configuration may be more appropriately sized.

If the motor approaches 1.4 MW under Normal Duty conditions, the 1K4 configuration becomes much more suitable.

33. Target Model vs. Lower-Power PowerFlex 755 Models

Model	Voltage	ND power	HD power	Relative position
20G11JF1K4JN0NNNNN	690 VAC	1,400 kW	1,120 kW	Highest capacity in this comparison
20G11JF1K0JN0NNNNN	690 VAC	1,000 kW	900 kW	High power
20G11JF960JN0NNNNN	690 VAC	900 kW class	800 kW class	Large industrial
20G11JF795JN0NNNNN	690 VAC	800 kW	710 kW	Large industrial
20G11JF710JN0NNNNN	690 VAC	710 kW	590 kW class	Medium-large industrial

This comparison provides a simple way to understand where the target model sits within the family.

It is intended for applications where the motor power is toward the upper end of the 690 V PowerFlex 755 range.

34. Recommended Selection by Motor Size

Approximate motor requirement	Suggested drive class	Reason
500–600 kW	Lower PowerFlex 755 configuration	Avoid unnecessary oversizing
600–700 kW	710 kW class	Appropriate for medium-large motor systems
700–800 kW	795 kW class	Suitable for larger industrial loads
800–900 kW	960 kW class	Additional capacity
Around 1,000 kW	1K0 class	Strong match for 1 MW applications
1,100–1,300 kW	1K4 class, depending on duty	Higher capacity required
Around 1,400 kW ND	1K4 class	Directly aligned with Normal Duty capacity

These are practical selection ranges rather than substitutes for detailed electrical sizing.

35. Main Advantages Summary

Advantage	Practical value
1,400 kW Normal Duty	Suitable for megawatt-class motors
1,120 kW Heavy Duty	Supports demanding load conditions
690 VAC	Appropriate for large industrial motor systems
1,400 A current class	Handles very high motor current
Frame 10	Large high-power architecture
Forced-air cooling	Manages high thermal load
Type 12/IP54	Suitable for many industrial environments
800 mm MCC-style depth	Suitable for large electrical installations
Embedded EtherNet/IP	Easy automation integration
Filtered configuration	Helps manage electrical-noise requirements
AC input with precharge	Controlled DC-bus charging
DC terminals	Additional system flexibility
No internal braking transistor	Requires separate braking strategy where needed
Variable-speed control	Better process flexibility
Controlled acceleration	Reduced mechanical shock

36. Overall Product Evaluation

The 20G11JF1K4JN0NNNNN is a very high-power industrial AC drive intended for large 690 V motor systems.

Its defining characteristics are its 1,400 A current class, 1,400 kW Normal Duty capacity, approximately 1,120 kW Heavy Duty capacity, Frame 10 construction, forced-air cooling, 800 mm MCC-style depth and Type 12/IP54 enclosure arrangement.

It is especially well suited to large pumps, fans, compressors, conveyors, crushers, grinding equipment and heavy process machinery.

Its high current and power capacity make it appropriate for major industrial equipment where motor control is a significant part of the overall process.

The embedded EtherNet/IP communication capability is another important advantage because it allows the drive to participate in a larger automation architecture.

The product also provides practical mechanical benefits through controlled acceleration and adjustable motor speed.

For centrifugal pumps and fans, variable-speed operation can potentially provide substantial energy advantages when the process does not require continuous full-speed operation.

For conveyors and heavy machinery, controlled acceleration can reduce mechanical shock.

For process machinery, adjustable speed can provide more accurate production control.

The major engineering limitations to consider are the product’s physical size, high electrical energy level, cooling requirements and the absence of an internal dynamic braking transistor.

The 800 mm depth should be included in cabinet and electrical-room planning.

The exact weight in kg should be taken from the final physical assembly documentation because the complete equipment weight can vary with the cabinet and installed configuration.

37. Final Technical Specification Table

Category	Specification
Model	20G11JF1K4JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	High-power AC variable frequency drive
Voltage	690 VAC
Input phase	Three phase
Current	1,400 A class
Light Duty	Approximately 1,500 kW
Normal Duty	1,400 kW
Heavy Duty	1,120 kW
Frame	Frame 10
Cooling	Forced air
Enclosure	Type 12
Protection	IP54
Cabinet depth	800 mm
Cabinet style	MCC style
Input configuration	AC input with precharge and DC terminals
Communication	Embedded EtherNet/IP
Filtering	Filtered
Common-mode capacitor jumper	Installed
Dynamic braking	None
Internal braking transistor	Not included
HIM	Blank / no HIM
Dimensions	Large Frame 10 MCC-style configuration; 800 mm nominal depth; final height and width depend on the complete cabinet arrangement
Weight (kg)	Final complete-unit weight must be confirmed from the actual mechanical/shipping configuration
Primary application	Large industrial motor control
Suitable equipment	Pumps, fans, compressors, conveyors, crushers, mills and process machinery
Main benefit	High-power variable-speed motor control
Communication advantage	Networked automation integration
Cooling advantage	Forced-air thermal management
Mechanical advantage	Controlled acceleration and adjustable speed
Energy advantage	Potential reduction in energy consumption for suitable variable-torque loads
Main selection criterion	Motor voltage, current and duty requirement
Closely related model	20G11JF1K0JN0NNNNN
Other related models	20G11JF960JN0NNNNN, 20G11JF795JN0NNNNN, 20G11JF710JN0NNNNN
Voltage-related alternative	20G11JD1K4JN0NNNNN
Other high-power alternative	20G11JE1K4JN0NNNNN

38. Conclusion

The 20G11JF1K4JN0NNNNN is a large-scale PowerFlex 755 AC drive intended for demanding industrial motor applications.

Its 690 VAC rating, 1,400 A current class and 1,400 kW Normal Duty capacity make it suitable for some of the largest motor-driven systems in industrial plants.

The product combines high power capacity with variable-speed operation, forced-air cooling, industrial enclosure protection and embedded EtherNet/IP communication.

For large pumps, fans and other variable-torque equipment, the drive can provide better process control and potentially improve energy utilization.

For conveyors, crushers, mills and other heavy mechanical equipment, controlled acceleration and speed regulation can reduce mechanical stress and improve process stability.

For automation systems, integrated network communication allows the drive to exchange operating and diagnostic information with the wider control system.

The most important selection point is to match the drive to the actual motor nameplate current, voltage and duty cycle.

The 1,500 kW Light Duty figure should not be treated as a universal motor-power rating. A demanding Heavy Duty application should be evaluated against the approximately 1,120 kW Heavy Duty capacity.

From a mechanical perspective, the 800 mm cabinet depth is an important installation requirement.

Because this is a very large high-power drive, the final cabinet height, width and weight in kg should be confirmed from the exact physical configuration before transportation, lifting, foundation design and installation.

Overall, the 20G11JF1K4JN0NNNNN is best suited to large industrial facilities where high-power motor control, variable speed, process integration and reliable long-term operation are more important than compact physical size.