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20G11LC1K4JN0NNNNN — Detailed Product Introduction, Technical Parameters, Applications, Advantages and Related Models

The 20G11LC1K4JN0NNNNN is a high-power air-cooled AC drive in the PowerFlex 755 family. It is designed for large three-phase motor applications where high current capacity, controlled acceleration and deceleration, adjustable motor speed, and integration with an industrial control system are required.

This particular configuration is a 400 VAC, three-phase, 1465 A, Frame 9 drive. It is rated at approximately 850 kW for light-duty applications, 800 kW for normal-duty applications, and 630 kW for heavy-duty applications.

The J configuration in the catalog number is significant because it indicates that the common-mode capacitor jumper is installed. This distinguishes the model from otherwise similar configurations using the A configuration.

The following information is written as an engineering-oriented product description. Where a physical dimension or weight cannot be safely determined from the catalog number alone, it is explicitly identified rather than filling the table with an estimated value.

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1. Product Basic Information

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2. Brand and Product Series

Brand: Allen-Bradley

Series: PowerFlex 755

Product Family: PowerFlex 750 Series

The PowerFlex 755 family is positioned as a high-performance industrial variable-frequency drive platform for large and technically demanding motor applications.

Compared with compact machine drives, this family is intended for equipment where the motor power, current, control requirements and system integration requirements are substantially higher.

The 20G11LC1K4JN0NNNNN is therefore not a small cabinet-mounted inverter. It is a large industrial drive intended for installation in a properly designed electrical cabinet, MCC-style lineup or electrical room.

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3. What Is the 20G11LC1K4JN0NNNNN?

The 20G11LC1K4JN0NNNNN is a large-capacity variable frequency drive used to control the speed and torque of three-phase AC motors.

Instead of connecting the motor directly to a fixed-frequency supply and allowing it to run at essentially fixed speed, the drive controls the electrical frequency and voltage supplied to the motor.

This allows the motor speed to be adjusted according to the process.

For example, a large pump does not necessarily need to operate at full speed all the time. A large fan may also require different airflow levels during different stages of production.

With an appropriately sized variable frequency drive, the motor can operate at a controlled speed instead of simply running at full speed.

For industrial equipment, this can provide better process control and smoother motor operation.

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4. Main Electrical Rating

The most important specification of this model is its 1465 A output-current rating.

This places it in the high-current range of low-voltage industrial drives.

The principal power ratings are:

These ratings should not be interpreted as three different motor sizes that can automatically be selected without considering the application.

The correct rating depends on the motor nameplate current and the mechanical load.

For example, a centrifugal pump normally has very different loading characteristics from a heavily loaded conveyor.

Therefore, a motor with a particular kW rating may require a different drive duty classification depending on the application.

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5. Technical Parameters

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6. Physical Dimensions

The model uses an 800 mm deep MCC-style enclosure.

The 800 mm dimension is particularly important when designing the electrical room or MCC lineup.

However, the overall height and width should not be invented from the catalog number.

For a large Frame 9 packaged drive, the final mechanical arrangement can affect the total dimensions.

For transportation and floor-loading calculations, it is important to use the actual mechanical drawing or equipment configuration rather than an estimated weight.

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7. Why the Weight Is Not Given as an Estimated Number

For a product of this size, giving an invented weight can be more misleading than leaving the field marked as configuration-dependent.

A Frame 9 packaged drive can have different physical arrangements depending on installed options, wiring configuration and cabinet construction.

Therefore, the appropriate engineering notation is:

Product Weight (kg): Configuration-dependent — confirm from the final mechanical drawing.

This is especially important for:

• Crane selection
• Forklift selection
• Transportation
• Floor loading
• Cabinet foundation design
• Equipment-room planning
• Installation manpower planning

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8. The Meaning of the J Configuration

One of the important differences between 20G11LC1K4JN0NNNNN and the corresponding A configuration is the filtering/common-mode capacitor arrangement.

For this model:

J = Common-mode capacitor jumper installed

The filtering configuration is therefore different from a corresponding configuration in which the common-mode capacitor jumper is removed.

This detail matters when the drive is installed into a particular motor and power-distribution system.

It should not be changed casually after installation.

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9. No Factory-Installed HIM

The model uses a blank display / no HIM configuration.

HIM refers to the Human Interface Module used for local drive interaction.

A no-HIM configuration can make sense when the drive is primarily operated through:

• PLC control
• SCADA
• Remote HMI
• Industrial Ethernet
• Central control room
• Distributed automation system

For a large industrial plant, local operator control may not be necessary because operators may control the drive from a central system.

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10. Embedded EtherNet/IP

Embedded EtherNet/IP communication is one of the practical features of the drive.

It allows the drive to participate in an industrial automation network.

Typical information exchanged between the controller and drive can include:

This makes the drive appropriate for large automated production systems.

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11. Product Applications

Large Pump Systems

One of the most suitable applications is large industrial pumping.

Examples include:

• Cooling-water pumps
• Process-water pumps
• Industrial circulation pumps
• Water-treatment pumps
• Large utility pumps
• Mining dewatering pumps
• Industrial wastewater pumps

The drive can regulate pump speed according to process demand.

This can be useful when the required flow varies throughout the day or production cycle.

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12. Cooling Water Systems

Large industrial facilities often have cooling-water systems containing very large motors.

The drive can be used to control:

• Cooling-water pumps
• Circulation pumps
• Heat-exchanger pumps
• Cooling tower systems
• Process cooling systems

The ability to adjust motor speed provides flexibility compared with fixed-speed motor operation.

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13. Industrial Fans

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

Potential applications include:

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

Variable speed allows airflow to be adjusted according to production requirements.

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14. Large Blowers

The drive can also be applied to large blowers.

Examples include:

• Process-air blowers
• Aeration blowers
• Combustion-air blowers
• Industrial ventilation blowers
• Dust-control blowers
• Air-supply systems

For these applications, the actual blower curve and required operating range should be considered when selecting the drive.

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15. Conveyor Systems

The model is also appropriate for consideration in large conveyor systems.

Typical industries include:

• Mining
• Cement
• Aggregates
• Ports
• Bulk material handling
• Heavy manufacturing

A variable frequency drive can provide controlled acceleration rather than immediately applying full operating speed.

This can reduce mechanical shock on:

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

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16. Mining Equipment

Mining equipment often uses very large motors.

Potential applications include:

• Long conveyors
• Dewatering systems
• Ventilation systems
• Material handling
• Processing machinery
• Large pumps

The high-current capability of the model makes it suitable for consideration in these applications.

Environmental conditions should nevertheless be evaluated separately because a standard Type 1 / IP20 enclosure is intended for a controlled electrical environment rather than direct exposure to severe outdoor conditions.

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17. Cement and Aggregate Equipment

Large cement and aggregate plants commonly use high-power motors.

The drive can be considered for:

• Large fans
• Conveyors
• Pumps
• Blowers
• Material handling
• Process equipment
• Dust-control systems
• Cooling equipment

Its high current rating makes it particularly relevant to large continuous-process machinery.

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18. Compressor Applications

Large industrial compressors can also use variable speed control.

Potential benefits include:

• Adjustable process output
• Controlled acceleration
• Reduced starting shock
• Centralized monitoring
• Flexible operating speed

The compressor type must be considered carefully because centrifugal, screw and reciprocating compressors have substantially different load characteristics.

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19. Material-Handling Applications

The model can be used in large material-handling equipment where the motor requires substantial current.

Typical equipment includes:

• Heavy conveyors
• Bulk-material systems
• Transfer equipment
• Industrial transport systems
• Large production machinery

Variable-speed operation can make it easier to match machine speed to the production process.

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20. Main Advantages

20.1 Very High Current Capacity

The 1465 A output rating is the most obvious advantage.

It provides sufficient capacity for very large low-voltage motors.

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20.2 High Power Capability

The drive supports up to approximately:

850 kW light duty

800 kW normal duty

630 kW heavy duty

This gives it a wide range of potential industrial applications.

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20.3 400 VAC Three-Phase Architecture

The 400 VAC three-phase rating makes the drive suitable for large industrial low-voltage electrical systems.

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20.4 Frame 9 Construction

The Frame 9 design is intended for high-power applications and industrial electrical-room installation.

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20.5 Forced-Air Cooling

Forced-air cooling provides the heat-removal capability needed for a large-capacity drive.

Adequate ventilation remains essential.

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20.6 EtherNet/IP Integration

Embedded EtherNet/IP makes it easier to integrate the drive into an automated plant.

The drive can be monitored and controlled from a centralized automation system.

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20.7 Controlled Motor Acceleration

The drive can provide controlled acceleration instead of connecting a large motor directly to the electrical supply.

This can help reduce mechanical shock.

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20.8 Flexible Process Speed

The motor does not have to operate continuously at a single fixed speed.

The drive can adjust speed according to process requirements.

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20.9 Industrial Automation Compatibility

The model is well suited to large automated systems where motor control is part of a broader PLC, HMI and SCADA architecture.

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20.10 No Local HIM Requirement

For systems using centralized control, the blank-HIM configuration can reduce the need for local operator hardware.

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21. Five Same-Series or Closely Related Models

The following models are useful for comparison when selecting a PowerFlex 755 drive around the same high-power range.

The first three models are useful when the required motor current is lower.

The K4 configuration is appropriate when the application is near the upper end of this current range.

The JN2 version is a related configuration with a different option arrangement and can be considered when the project requirements differ from the basic JN0 configuration.

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22. Same-Series Model Comparison

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23. Five Related Models from the Same Brand

For projects that do not necessarily require exactly the same high-power configuration, the following models are useful comparison products within the same brand’s industrial drive range.

The smaller models are not direct electrical replacements for the 20G11LC1K4JN0NNNNN.

They are included as related products because they occupy different portions of the same industrial variable-frequency-drive portfolio.

For an actual replacement, the motor current and duty rating must be checked first.

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24. Direct Selection Guide

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25. Important Selection Considerations

The model should not be selected solely by motor horsepower.

The following parameters should be checked:

Motor Rated Current

The motor’s nameplate current is one of the most important selection criteria.

The drive must be capable of supplying the required current continuously.

Duty Cycle

The application should be classified appropriately.

A pump may have a relatively moderate torque requirement, while a conveyor may have much more demanding starting and overload conditions.

Acceleration Time

Large motors and high-inertia loads may require carefully controlled acceleration.

Deceleration Time

The stopping requirement is equally important.

This particular configuration has no dynamic braking, so applications requiring rapid controlled stopping should receive special engineering attention.

Ambient Temperature

High ambient temperature can affect drive performance and cooling requirements.

Altitude

High-altitude installations can affect cooling performance and may require derating depending on the actual installation conditions.

Motor Cable Length

Long motor cables can influence electrical behavior, insulation stress and EMC performance.

Cabinet Ventilation

A high-power air-cooled drive requires sufficient airflow.

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26. Dynamic Braking

The configuration specifies:

Dynamic Braking: None

This is important.

Some applications have high rotational inertia and require rapid stopping.

Examples include:

• Large conveyors
• High-speed machinery
• Certain hoisting systems
• High-inertia fans
• Certain process machines

In such cases, the braking strategy should be evaluated before selecting the drive configuration.

The absence of internal dynamic braking does not mean the drive cannot stop the motor under normal conditions.

It means that the particular configuration does not include the internal dynamic braking arrangement.

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27. EMC and Common-Mode Configuration

The model uses the filtered, CM-jumper-installed configuration.

This is particularly relevant in installations where electromagnetic compatibility and common-mode behavior are important.

The actual system performance depends on more than the drive alone.

Good installation practice includes:

• Proper grounding
• Appropriate motor cable
• Correct cable routing
• Separation of control and power wiring
• Proper cabinet bonding
• Appropriate shielding
• Correct termination

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28. Cooling and Maintenance

Because this is a high-power air-cooled drive, cooling maintenance is important.

Typical maintenance points include:

Good cooling conditions can have a significant effect on the service life of a high-power drive.

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29. Advantages in Pump Systems

For large pump systems, the main benefits can include:

• Adjustable flow
• Adjustable pressure
• Smooth acceleration
• Reduced mechanical shock
• Centralized control
• Process flexibility
• Motor speed regulation

A pump system can be operated at different speeds according to the required process condition.

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30. Advantages in Fan Systems

For large fans, the main advantages include:

• Adjustable airflow
• Controlled starting
• Process optimization
• Reduced mechanical stress
• Centralized monitoring
• Flexible speed control

Large fan applications are especially interesting because airflow requirements can change considerably throughout an industrial process.

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31. Advantages in Conveyor Systems

For large conveyors, controlled speed and acceleration can be particularly valuable.

Potential advantages include:

• Smooth startup
• Reduced belt shock
• Reduced gearbox stress
• Controlled material flow
• Adjustable production speed
• Centralized monitoring

The actual benefit depends on the conveyor design and load profile.

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32. Advantages in Automated Production Lines

The embedded EtherNet/IP interface allows the drive to become part of a broader control system.

For example, a production controller can issue a speed reference to the drive while simultaneously monitoring:

• Current
• Speed
• Status
• Faults
• Warnings
• Operating frequency

This allows the drive to function as an integrated component of the production system rather than as an isolated motor controller.

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33. Product Advantages Summary

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34. Complete Parameter Table

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35. Overall Product Evaluation

The 20G11LC1K4JN0NNNNN is a high-power industrial variable frequency drive intended for applications where a conventional small or medium-size drive would not provide sufficient current capacity.

Its 1465 A output rating is the central characteristic of the model.

The 850 kW light-duty, 800 kW normal-duty and 630 kW heavy-duty ratings allow it to cover a wide range of large motor applications.

The product is particularly suitable for large pumps, cooling-water systems, industrial fans, blowers, conveyors, mining equipment, cement equipment, compressors and other large process machines.

The Frame 9, air-cooled construction, and 800 mm deep MCC-style enclosure make it more appropriate for a dedicated industrial electrical installation than for a compact machine-control cabinet.

The embedded EtherNet/IP capability is another major advantage when the drive is being installed into a modern automated plant.

The blank/no-HIM configuration is particularly practical where operation and monitoring are performed through a PLC, SCADA system or centralized HMI.

The J configuration, with the common-mode capacitor jumper installed, should also be considered when comparing this model with similar catalog numbers.

From a system-design perspective, the most important things to verify before purchasing or replacing the drive are the motor nameplate current, duty cycle, acceleration requirements, deceleration requirements, braking requirements, ambient temperature, altitude, motor-cable arrangement, cabinet ventilation and available electrical protection.

For mechanical planning, the 800 mm cabinet depth is a useful confirmed dimension.

For the weight in kg, an exact figure should not be fabricated from the catalog number. Because this is a large Frame 9 packaged configuration, the actual weight can depend on the final mechanical arrangement and installed options. The final mechanical drawing should therefore be used for transportation, lifting and floor-loading calculations.

In practical terms, the 20G11LC1K4JN0NNNNN can be considered a strong choice for a very large 400 VAC three-phase motor application requiring approximately 1465 A of drive current and up to approximately 800 kW normal-duty power.