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20G11JF1K4AN0NNNNN — PowerFlex 755 High-Power AC Drive: Detailed Product Introduction, Technical Parameters, Applications, Advantages and Model Recommendations

1. Product Overview

The 20G11JF1K4AN0NNNNN is a high-power air-cooled AC drive from the Allen-Bradley PowerFlex 755 family. It is designed for large industrial motor-control applications where high output power, high current capacity, adjustable motor speed, controlled acceleration and deceleration, and integration with industrial automation systems are required.

This model is a 690 VAC, three-phase, Frame 10 drive with a very large current capacity. Its catalog rating is 1,400 A, with a 1,500 kW Light Duty rating, 1,400 kW Normal Duty rating, and 1,120 kW Heavy Duty rating. This places it in the very high-power range of the PowerFlex 755 platform.

The configuration uses an AC input with precharge and DC terminals, forced-air cooling, an 800 mm deep MCC-style enclosure, Type 12/IP54 protection, embedded Ethernet/IP, an EMC filter, and a removed common-mode capacitor jumper configuration. The model does not include dynamic braking and is supplied in a blank/no-HIM configuration.

It is therefore better suited to large industrial installations than to compact machinery. Typical applications include large pumps, fans, compressors, conveyors, crushers, mills, process equipment and other large motor-driven systems.

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	20G11JF1K4AN0NNNNN
Drive construction	Air cooled
Frame	Frame 10
Voltage class	690 VAC
Phase	Three phase
Current class	1,400 A
Light Duty rating	1,500 kW
Normal Duty rating	1,400 kW
Heavy Duty rating	1,120 kW
Input configuration	AC input with precharge and DC terminals
Cooling	Forced air
Enclosure style	Type 12 / IP54, 800 mm deep MCC style
Communication	Embedded Ethernet/IP
Filtering	EMC filter
Common-mode capacitor jumper	Removed
Dynamic braking	None
HIM	Blank / No HIM

The model belongs specifically to the PowerFlex 755 AC Drive series. The exact catalog configuration is important because different characters in the catalog number determine voltage class, input arrangement, filtering/common-mode configuration and other options.

3. Detailed Technical Parameters

Parameter	20G11JF1K4AN0NNNNN
Model	20G11JF1K4AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product category	AC Variable Frequency Drive
Rated voltage	690 VAC
Input phase	Three phase
Rated current	1,400 A
Light Duty output	1,500 kW
Normal Duty output	1,400 kW
Heavy Duty output	1,120 kW
Light Duty motor class	Approximately 1.5 MW
Normal Duty motor class	Approximately 1.4 MW
Heavy Duty motor class	Approximately 1.12 MW
Input frequency	50/60 Hz class, application dependent
Input type	AC input with precharge and DC terminals
DC terminals	Yes
Cooling	Forced air
Frame size	Frame 10
Enclosure	Type 12
Protection level	IP54
Cabinet depth	800 mm
Cabinet style	MCC style
Communication	Embedded Ethernet/IP
Filter	EMC filter
Common-mode capacitor jumper	Removed
Dynamic braking	None
HIM	Blank / no HIM
Motor-control purpose	Variable-speed and torque control
Application class	Large industrial motor systems
Installation type	Large industrial cabinet / MCC-style installation
Dimensions	Large Frame 10 MCC-style enclosure; 800 mm nominal depth; overall height and width depend on the exact cabinet arrangement
Weight	Exact complete-unit weight: project-configuration dependent; confirm the final shipping/mechanical drawing before transport or lifting
Cooling requirement	High-volume forced-air cooling suitable for very high-power operation
Power range	Up to 1,500 kW Light Duty
Duty classification	Light Duty / Normal Duty / Heavy Duty

The 690 V selection table identifies this configuration at 1,485 A Light Duty output current, 1,400 kW Normal Duty, and 1,160 A Heavy Duty output current with 1,120 kW Heavy Duty power, while the product description identifies the catalog configuration as 1,400 A class and 1,500/1,400/1,120 kW LD/ND/HD. The precise current figures should therefore be interpreted according to the applicable duty-rating table rather than treating the catalog current as a single operating current for every duty condition.

4. Important Explanation of the 1K4 Rating

The 1K4 portion of the catalog number is particularly important.

Compared with smaller configurations such as 1K0, the 1K4 version represents a substantially higher current and power class.

For this model, the 690 V configuration is rated around:

Duty	Power rating	Approx. continuous output current
Light Duty	1,500 kW	1,485 A
Normal Duty	1,400 kW	1,400 A
Heavy Duty	1,120 kW	1,160 A

This means that the 1,500 kW figure should not automatically be used as the motor-selection value for every application.

If the application requires a higher overload capability, the Heavy Duty rating becomes more important. A motor or machine requiring heavy acceleration, high breakaway torque or repeated overload may need to be evaluated against the Heavy Duty rating instead of the Light Duty rating.

5. Product Introduction

The PowerFlex 755 platform is designed for industrial motor-control applications that require more than simple motor starting and stopping.

The drive receives electrical power from the AC supply and converts it into controlled electrical output for the motor. By controlling motor frequency and voltage, the drive can regulate motor speed and torque according to the process requirements.

For very large motors, this type of control can be especially valuable.

A conventional fixed-speed motor may operate at full speed even when the process only requires part of its available capacity. A variable-frequency drive can reduce the motor speed when appropriate, increase it when demand rises, and provide controlled acceleration and deceleration.

This makes the drive useful not only as an electrical conversion device, but also as an important part of the overall process-control system.

The 20G11JF1K4AN0NNNNN is positioned at the upper end of the PowerFlex 755 air-cooled drive range. Its combination of 690 VAC operation, approximately 1.4 kA current class and megawatt-level power makes it suitable for large plant equipment.

6. What the Product Does

The basic function of the product can be summarized as follows:

Fixed-frequency AC supply → AC drive → controlled-frequency motor supply → variable motor speed/torque → controlled industrial process

Instead of allowing the motor to run only at a fixed speed, the drive can provide a controllable operating point.

Depending on the application and control method, the drive can be used for:

• Motor starting
• Motor stopping
• Speed adjustment
• Acceleration control
• Deceleration control
• Torque control
• Process synchronization
• Load management
• Energy optimization
• Fault monitoring
• Automation-system integration

7. Main Application Areas

7.1 Large Pumps

Large pumps are one of the most suitable application areas for a high-power variable-frequency drive.

Industrial water systems, cooling-water systems, process-water systems and large circulation systems frequently have changing flow requirements.

Operating a pump continuously at maximum speed and regulating flow through throttling can create unnecessary energy losses.

A variable-frequency drive allows the pump motor speed to be adjusted according to the required flow or pressure.

For a very large pump, the 1,400 kW-class Normal Duty capacity of this model provides the power margin required for major industrial pumping equipment.

7.2 Large Fans and Blowers

Large fans can consume significant electrical power, particularly when operating continuously.

The drive can adjust fan speed according to the required airflow.

Applications can include:

• Industrial ventilation
• Furnace air systems
• Process exhaust
• Dust collection systems
• Large cooling systems
• Mine ventilation
• Combustion-air systems
• Industrial blower systems

The ability to change motor speed rather than relying solely on mechanical dampers can improve overall process flexibility.

7.3 Compressors

Large compressors are another important application.

The drive can regulate compressor motor speed according to process requirements where the compressor and motor combination is compatible with variable-speed operation.

Potential applications include:

• Industrial compressed air
• Process gas
• Chemical processing
• Petrochemical systems
• Large refrigeration-related equipment
• Gas-processing equipment

Compressor selection requires particular attention to minimum and maximum operating speed, torque characteristics and the manufacturer’s allowable speed range.

7.4 Conveyors

Large conveyors can require extremely high motor power.

This is especially true for:

• Mining conveyors
• Ore handling
• Bulk material transport
• Port equipment
• Cement plants
• Aggregate plants
• Heavy manufacturing

Controlled acceleration can reduce mechanical shock during startup.

This can help reduce stress on:

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

For large conveyor systems, speed control can also be used to coordinate material flow between different sections of the process.

7.5 Crushers

Large crushers require high torque and significant mechanical power.

A high-power variable-frequency drive can provide controlled acceleration and allow the motor to be integrated more closely with the production-control system.

Typical equipment includes:

• Primary crushers
• Secondary crushers
• Large feeders
• Material-processing machines
• Mining machinery

7.6 Mills and Grinding Equipment

Large mills can have very high motor-power requirements.

The drive can be used to control motor speed and provide a controlled operating profile.

Potential applications include:

• Grinding mills
• Ball mills
• Material-processing mills
• Cement grinding equipment
• Mineral processing
• Heavy process machinery

7.7 Industrial Process Equipment

Many large industrial machines do not need to operate continuously at maximum speed.

A variable-speed drive allows the motor to become part of the process-control strategy.

This can be particularly useful when production rates vary throughout the day or when the equipment needs to operate at several different production levels.

8. Major Product Advantages

8.1 Extremely High Power Capacity

The most obvious advantage is the large power capacity.

The model reaches 1,500 kW in Light Duty and 1,400 kW in Normal Duty, making it suitable for approximately megawatt-scale industrial motor systems.

This is a major advantage when a conventional smaller drive would require multiple units or would simply not have enough output capacity.

8.2 690 VAC Operation

The 690 VAC voltage class is well suited to large industrial motors.

At high power levels, higher motor voltage can help keep operating current within a practical range.

For a 1.4 MW-class motor system, current levels are already substantial, so the 690 V platform can be advantageous for the electrical distribution design.

8.3 Very High Current Capacity

The approximately 1,400 A current class places this model among the largest air-cooled configurations in the family.

This makes it suitable for motors that are far beyond the capacity of ordinary industrial drives.

8.4 Multiple Duty Ratings

The availability of Light Duty, Normal Duty and Heavy Duty ratings gives engineers more flexibility when matching the drive to the application.

Duty	Rating	Typical use
Light Duty	1,500 kW	Less demanding overload profile
Normal Duty	1,400 kW	General large industrial applications
Heavy Duty	1,120 kW	Higher torque / more demanding duty

This distinction is particularly important for heavy machinery.

8.5 Embedded Ethernet/IP

The integrated Ethernet/IP capability makes the drive suitable for modern automation architectures.

It can participate in a networked control system and exchange information such as:

• Speed reference
• Actual speed
• Current
• Drive status
• Fault status
• Alarm information
• Start/stop commands
• Control commands
• Diagnostic information

This can reduce the need for separate communication hardware in many system architectures.

8.6 Forced-Air Cooling

A drive of this power level produces substantial heat.

Forced-air cooling allows the power section to dissipate heat effectively.

The cooling system is therefore an essential part of the overall drive design.

For installation, the cooling-air path should remain unobstructed and the environment should be kept within the applicable operating conditions.

8.7 Type 12 / IP54 Configuration

The Type 12/IP54 configuration provides enclosure protection suitable for many industrial indoor environments.

This makes the product more appropriate for industrial installation than an open-frame configuration where environmental protection must be provided externally.

8.8 MCC-Style 800 mm Deep Construction

The 800 mm deep MCC-style configuration is designed around large industrial cabinet installations.

This makes it suitable for integration into substantial electrical rooms and motor-control systems.

At the same time, the physical size means that cabinet planning, cable routing, access space and lifting arrangements must be considered before installation.

9. Input Configuration

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

The precharge function is important in high-power drives because the DC bus contains substantial capacitive energy.

The precharge circuit controls the initial charging process rather than allowing the capacitors to experience an uncontrolled charging current.

The availability of DC terminals also provides greater flexibility for applications involving DC-bus arrangements and related drive-system architectures.

10. Filtering and Common-Mode Configuration

This particular model uses an EMC filter and has the common-mode capacitor jumper configuration removed.

This is an important distinction when comparing models with similar electrical ratings.

Filtering and common-mode configuration can influence:

• Electromagnetic compatibility
• Ground-current behavior
• Motor-cable considerations
• System grounding
• Installation requirements
• Electrical noise

For this reason, two PowerFlex 755 models with similar power ratings should not automatically be considered electrically identical simply because their voltage and current ratings are similar.

11. Dynamic Braking

The 20G11JF1K4AN0NNNNN configuration does not include dynamic braking.

This matters in applications where rapid deceleration is required.

If a large motor has substantial rotating inertia and the process requires rapid stopping, the engineering design needs to determine how the regenerative energy will be handled.

Possible system-level approaches can include external braking arrangements or other regenerative-energy solutions, depending on the application.

Therefore, applications involving large fans, centrifuges, conveyors, high-inertia machines or frequent deceleration should be evaluated carefully before finalizing the drive configuration.

12. Dimensions and Weight

Because this is a Frame 10, 800 mm deep MCC-style high-power drive, its mechanical requirements are considerably greater than those of compact variable-frequency drives.

Mechanical parameter	Specification / engineering guidance
Model	20G11JF1K4AN0NNNNN
Frame	Frame 10
Enclosure style	Type 12 / IP54
Cabinet depth	800 mm
Overall height	Large MCC-style cabinet; verify final mechanical drawing
Overall width	Dependent on cabinet/power-section configuration
Approximate installation envelope	Large industrial MCC-style enclosure
Weight (kg)	Final complete-unit weight must be confirmed from the actual mechanical/shipping configuration
Lifting	Mechanical handling equipment is required for a drive of this size
Installation	Floor-mounted industrial cabinet arrangement
Service clearance	Must be designed according to the final installation arrangement
Cable access	Requires substantial power-cable routing space
Cooling clearance	Must maintain the manufacturer’s specified airflow path

For this type of high-power equipment, giving a single guessed weight in kilograms would be misleading. The catalog number identifies the electrical configuration, but the final physical assembly can contain different cabinet arrangements and accessories.

Therefore, the appropriate engineering practice is to use the actual shipping/mechanical drawing for the purchased configuration when designing the foundation, transportation method, lifting equipment and cabinet installation area.

The 800 mm depth, however, is a defined characteristic of the MCC-style configuration.

13. Recommended Installation Environment

The drive is intended for industrial applications and should be installed in an environment that is compatible with its enclosure and thermal requirements.

Important considerations include:

Installation factor	Consideration
Ambient temperature	Must remain within the specified operating range
Humidity	Avoid excessive condensation
Dust	Keep cooling-air passages clean
Ventilation	Required for forced-air cooling
Altitude	Check derating requirements where applicable
Vibration	Avoid excessive mechanical vibration
Grounding	Proper protective and system grounding required
Cable routing	Separate power and sensitive control wiring appropriately
Maintenance	Provide sufficient access around the cabinet
Lifting	Use suitable equipment for the actual cabinet weight

Because the unit is very large and powerful, installation quality has a direct effect on reliability.

14. Five Recommended Models from the Same Series

The following models are closely related PowerFlex 755 configurations and are useful alternatives or comparison points.

Model	Voltage	Current class	Light Duty	Normal Duty	Heavy Duty	Frame	Cooling	Enclosure
20G11JF1K0AN0NNNNN	690 VAC	1,150 A class	1,100 kW	1,000 kW	900 kW	10	Air cooled	Type 12/IP54, 800 mm MCC style
20G11JF960AN0NNNNN	690 VAC	1,020 A class	1,000 kW	900 kW	800 kW	9	Air cooled	Type 12/IP54
20G11JF795AN0NNNNN	690 VAC	960 A class	900 kW	800 kW	710 kW	9	Air cooled	Type 12/IP54
20G11JF765AN0NNNNN	690 VAC	860 A class	850 kW	750 kW	630 kW	9	Air cooled	Type 12/IP54
20G11JF710AN0NNNNN	690 VAC	790 A class	800 kW	710 kW	590 kW	9	Air cooled	Type 12/IP54

The ratings above follow the 690 V PowerFlex 755 selection data, where the 1K4 configuration is the 1,500/1,400/1,120 kW LD/ND/HD class and the lower configurations step down progressively in current and power.

15. Detailed Comparison of the Same-Series Recommendations

Model	Current	LD Power	ND Power	HD Power	Main application positioning
20G11JF1K4AN0NNNNN	1,400 A class	1,500 kW	1,400 kW	1,120 kW	Very large motors and major industrial processes
20G11JF1K0AN0NNNNN	1,150 A class	1,100 kW	1,000 kW	900 kW	Large pumps, fans and compressors
20G11JF960AN0NNNNN	1,020 A class	1,000 kW	900 kW	800 kW	Large process motors
20G11JF795AN0NNNNN	960 A class	900 kW	800 kW	710 kW	Large industrial machinery
20G11JF765AN0NNNNN	860 A class	850 kW	750 kW	630 kW	Medium-large 690 V motors
20G11JF710AN0NNNNN	790 A class	800 kW	710 kW	590 kW	Lower-power large industrial applications

This group provides a useful progression for equipment selection.

If the motor requires approximately 1.4 MW under Normal Duty conditions, the 1K4 model is the appropriate capacity class.

If the motor is closer to 1 MW, the 1K0 configuration can provide a more proportionate solution.

For motors in the 600–900 kW range, the smaller Frame 9 configurations can be considered, provided the actual motor current and overload characteristics remain within the selected drive’s limits.

16. Five Popular / Representative Models from the Same Brand

The following models represent useful products from the same brand across different PowerFlex families and power classes.

Model	Product family	Voltage class	Current / capacity	Power rating	Typical application	Cooling
20G11JF1K4AN0NNNNN	PowerFlex 755	690 VAC	1,400 A class	1,400 kW ND	Very large industrial motors	Air cooled
20G11JF1K0AN0NNNNN	PowerFlex 755	690 VAC	1,150 A class	1,000 kW ND	Large pumps/fans/process equipment	Air cooled
20G11JF960AN0NNNNN	PowerFlex 755	690 VAC	1,020 A class	900 kW ND	Large industrial equipment	Air cooled
20G11JD1K4AN0NNNNN	PowerFlex 755	480 VAC	1,420 A class	1,250 HP ND	Large 480 V industrial motors	Air cooled
20G11JE1K4AN0NNNNN	PowerFlex 755	600 VAC	1,530 A class	1,400 HP ND	Large 600 V industrial motors	Air cooled

The 480 V and 600 V alternatives are useful when the plant’s motor voltage is different from 690 V. The 690 V version should not be selected solely because its kW rating is higher; the motor nameplate voltage must match the drive’s electrical configuration.

17. Comparison of Voltage Classes

Model	Voltage	Approx. power class	Suitable system
20G11JF1K4AN0NNNNN	690 VAC	1,400 kW ND	690 V motor systems
20G11JD1K4AN0NNNNN	480 VAC	1,250 HP ND	480 V motor systems
20G11JE1K4AN0NNNNN	600 VAC	1,400 HP ND	600 V motor systems
20G11JF1K0AN0NNNNN	690 VAC	1,000 kW ND	690 V motor systems
20G11JF960AN0NNNNN	690 VAC	900 kW ND	690 V motor systems

The key selection principle is simple: match the drive to the motor voltage and current first, then evaluate power and duty rating.

18. Application Selection Table

Application	Suitability	Main reason
Large water pump	Excellent	High power and variable-speed control
Large cooling-water pump	Excellent	Speed can follow process demand
Large industrial fan	Excellent	Variable airflow control
Large blower	Excellent	Adjustable motor speed
Large compressor	Very good	High-power motor control where variable speed is permitted
Mining conveyor	Excellent	Controlled acceleration and speed
Crusher	Very good	High-power motor and controlled starting
Grinding mill	Very good	Large motor and speed/torque control
Cement equipment	Excellent	Large process motors
Steel-process equipment	Excellent	High-power motor control
Pulp and paper equipment	Very good	Process speed control
Small machinery	Poor choice	Excessive capacity and physical size
Small pumps	Poor choice	Drive is significantly oversized

The product is most valuable where motor power is measured in hundreds of kilowatts or megawatts.

19. Advantages for Energy Management

Variable-speed control can be especially valuable for centrifugal pumps and fans.

If the process does not require maximum flow, the motor can operate at a lower speed.

This can reduce the electrical power required by the motor compared with continuously running at maximum speed and regulating the process entirely through mechanical throttling.

The actual energy-saving level depends on:

• Motor efficiency
• Pump or fan efficiency
• System curve
• Required flow
• Operating hours
• Speed range
• Process conditions
• Control strategy

Therefore, the drive itself does not automatically guarantee a particular percentage of energy savings. The largest benefit occurs when the mechanical load has characteristics that respond favorably to variable-speed operation.

20. Advantages for Mechanical Equipment

Controlled acceleration is another major benefit.

A large motor connected directly to a mechanical load can create significant starting torque and mechanical shock.

With controlled acceleration, the drive can gradually increase motor speed.

This can reduce stress on:

• Gearboxes
• Couplings
• Shafts
• Belts
• Conveyor systems
• Bearings
• Pump assemblies
• Mechanical transmission systems

This can be particularly valuable in heavy industrial equipment where maintenance costs are high.

21. Advantages for Process Control

The drive can also become part of the process-control loop.

For example, a large pump can be controlled according to pressure.

A large fan can be controlled according to airflow.

A conveyor can be controlled according to production speed.

A process motor can be synchronized with another machine.

This provides a much more flexible solution than a simple contactor-based motor starter.

22. Advantages of the PowerFlex 755 Platform

Feature	Practical advantage
High-power architecture	Supports very large industrial motors
690 V capability	Suitable for high-power 690 V motor systems
Ethernet/IP	Network integration
Multiple duty ratings	Easier application matching
Forced-air cooling	Suitable for high-power thermal management
Type 12/IP54 enclosure	Industrial environmental protection
MCC-style design	Suitable for large electrical rooms
DC terminals	Additional DC-bus flexibility
Precharge	Controlled DC-bus charging
EMC filtering	Improved electrical-noise management
Large frame	High-current capability
Variable-speed control	Improved process flexibility

23. Model Number Interpretation

The catalog number can be interpreted as a collection of configuration selections.

Catalog number section	General significance
20G	PowerFlex 755 platform
11	Large-frame packaged-drive configuration
J	690 VAC voltage class
F	690 V family configuration
1K4	Approximately 1,400 A high-power class
A	AC input arrangement without DC terminals in the corresponding configuration position
N	Option position with no selected option
0	Specified option configuration
NNNN	Additional option positions without selected options

The exact interpretation of every character should always be made against the applicable catalog-number table for the particular product generation. In particular, the input and filtering characters have specific meanings and should not be inferred solely from the appearance of the model number. The technical selection data confirms that the A/J distinction is associated with the common-mode capacitor/filter configuration, while the input-type character determines the AC-input arrangement.

24. Maintenance Considerations

A high-power air-cooled drive requires regular maintenance.

Important maintenance areas include:

Cooling fans

Cooling fans should be inspected regularly because fan failure can cause excessive temperature rise.

Air passages

Dust and contamination can restrict airflow.

The cooling path should therefore be kept clean.

Power connections

High-current connections should be inspected according to the applicable maintenance procedure.

Grounding

Protective grounding should remain secure.

Cabinet condition

The enclosure should be checked for signs of contamination, corrosion or mechanical damage.

Network connections

Ethernet/IP communication connections should be checked when communication faults occur.

Fault history

Drive fault and alarm information can be useful for identifying developing problems before they become major failures.

25. Engineering Points to Check Before Purchasing

Before selecting this model for a project, the following information should be collected from the motor and machine.

Check item	Why it matters
Motor voltage	Must match the drive voltage class
Motor current	Most important electrical sizing parameter
Motor power	Confirms approximate capacity
Motor frequency	Determines operating frequency range
Motor speed	Determines required output-frequency range
Starting torque	Important for drive sizing
Maximum torque	Important for Heavy Duty applications
Acceleration time	Influences current and mechanical stress
Deceleration time	Important because dynamic braking is not included
Load inertia	Important for acceleration/deceleration
Duty cycle	Determines LD/ND/HD selection
Ambient temperature	Influences thermal performance
Installation altitude	May require derating
Cable length	Important for motor-output considerations
Grounding system	Important for EMC and reliability
Communication architecture	Determines control-system integration
Cabinet dimensions	Important for installation
Final equipment weight	Important for transport and lifting

This checklist is especially important for a drive of this size because an apparently suitable kW rating does not guarantee that the drive is suitable for the actual machine.

26. Target Model vs. Smaller Same-Series Model

Characteristic	20G11JF1K4AN0NNNNN	20G11JF1K0AN0NNNNN
Voltage	690 VAC	690 VAC
Current class	1,400 A	1,150 A class
LD power	1,500 kW	1,100 kW
ND power	1,400 kW	1,000 kW
HD power	1,120 kW	900 kW
Frame	10	10
Cooling	Air cooled	Air cooled
Application level	Very high power	High power
Typical motor size	Around 1.4 MW ND class	Around 1.0 MW ND class

The 1K4 is therefore a substantial step above the 1K0.

If a motor only requires approximately 800–1,000 kW, selecting the 1K4 may provide considerably more capacity than necessary.

If the motor is around 1.3–1.4 MW and the application is Normal Duty, however, the 1K4 configuration becomes much more appropriate.

27. Target Model vs. 960 A Configuration

Parameter	20G11JF1K4AN0NNNNN	20G11JF960AN0NNNNN
Voltage	690 VAC	690 VAC
Current class	1,400 A	1,020 A class
LD power	1,500 kW	1,000 kW
ND power	1,400 kW	900 kW
HD power	1,120 kW	800 kW
Frame	10	9
Cooling	Air cooled	Air cooled
General positioning	Very high power	Large industrial power

This comparison illustrates why the actual motor current is so important.

28. Key Product Advantages in Practical Terms

Requirement	Benefit provided by this model
Very large motor	1,400 kW Normal Duty class
High current requirement	Approximately 1,400 A class
690 V motor system	Directly suited to 690 V applications
Variable process demand	Adjustable motor speed
Large mechanical load	Controlled acceleration/deceleration
Industrial automation	Embedded Ethernet/IP
Large cabinet installation	MCC-style construction
Industrial environment	Type 12/IP54 enclosure
High thermal load	Forced-air cooling
Electrical noise concerns	EMC filtering
Multiple load profiles	LD/ND/HD ratings
Large process plant	Suitable for centralized industrial drive applications

29. Overall Evaluation

The 20G11JF1K4AN0NNNNN is a very large industrial AC drive designed for applications where motor power and current requirements are far beyond the range of ordinary variable-frequency drives.

Its most important characteristics are the 690 VAC voltage class, approximately 1,400 A current class, 1,500 kW Light Duty rating, 1,400 kW Normal Duty rating and 1,120 kW Heavy Duty rating.

The combination of Frame 10 construction, forced-air cooling, Type 12/IP54 enclosure protection, 800 mm deep MCC-style construction and embedded Ethernet/IP makes it suitable for substantial industrial installations.

Its strongest application areas are large pumps, fans, compressors, conveyors, crushers, mills and other process equipment with motors in the high-hundreds-of-kilowatts to megawatt range.

The product is particularly attractive when variable-speed control is needed for process regulation, energy management, mechanical-load control and automation-system integration.

The absence of dynamic braking should be considered carefully for high-inertia applications that require rapid deceleration.

The physical dimensions and final weight also deserve special attention. The 800 mm depth is a key configuration characteristic, but the final cabinet width, height and weight in kg should be taken from the actual mechanical/shipping configuration rather than estimated from the electrical catalog number alone.

30. Final Technical Summary

Category	Specification
Model	20G11JF1K4AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	High-power air-cooled AC drive
Voltage	690 VAC
Phase	Three phase
Current class	1,400 A
Light Duty	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	AC with precharge and DC terminals
Communication	Embedded Ethernet/IP
Filtering	EMC filter
Common-mode capacitor jumper	Removed
Dynamic braking	None
HIM	Blank / No HIM
Dimensions	Large Frame 10 MCC-style configuration; 800 mm nominal depth; final height/width depend on the actual cabinet configuration
Weight (kg)	Final weight must be confirmed from the actual shipping/mechanical configuration
Main applications	Pumps, fans, compressors, conveyors, crushers, mills and heavy process equipment
Primary advantage	Megawatt-class motor control with high current capacity
Duty flexibility	Light Duty / Normal Duty / Heavy Duty
Recommended related models	20G11JF1K0AN0NNNNN, 20G11JF960AN0NNNNN, 20G11JF795AN0NNNNN, 20G11JF765AN0NNNNN, 20G11JF710AN0NNNNN

31. Conclusion

The 20G11JF1K4AN0NNNNN is positioned as a high-end, very high-power member of the PowerFlex 755 family.

With its 690 VAC input, approximately 1,400 A current class and 1.4 MW Normal Duty capability, it is intended for major industrial motor applications rather than ordinary machine-level drive applications.

For a large pump, fan, compressor, conveyor, crusher, mill or other high-power process machine, the drive can provide a combination of variable-speed operation, controlled acceleration, process integration and high-current motor control.

When selecting this model, the most important engineering values are not simply the nominal motor kW. The motor nameplate current, voltage, duty cycle, overload requirements, acceleration/deceleration requirements, load inertia, operating speed range and installation environment should all be checked.

For applications below the 1.4 MW range, the smaller PowerFlex 755 configurations such as 20G11JF1K0AN0NNNNN, 20G11JF960AN0NNNNN, 20G11JF795AN0NNNNN, 20G11JF765AN0NNNNN and 20G11JF710AN0NNNNN can provide a more appropriately sized solution.

For the final procurement and engineering stage, the actual motor nameplate data and final mechanical configuration should be used to verify the drive selection, cabinet dimensions, lifting arrangement and exact equipment weight.