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1. Product Identification

The 20G11LC2K1JN0NNNNN is a high-power AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase industrial motors and is positioned at the high-power end of the PowerFlex 755 range. This particular configuration is associated with a 400 VAC, three-phase input, approximately 2,150 A rated current, and megawatt-class motor power.

The configuration is an air-cooled packaged drive, using an 800 mm deep MCC-style mechanical arrangement, with Type 1 / IP20 protection, embedded EtherNet/IP communication, AC input with DC terminals, and forced-air cooling.

For large industrial installations, the important characteristics are not only the nominal motor power but also the current rating, duty class, cooling arrangement, enclosure construction, communication architecture, cabinet dimensions and available options.

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2. Basic Product Information

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3. Brand and Series

The brand is Allen-Bradley, while the product belongs to the PowerFlex 755 series.

The PowerFlex 755 family is intended for demanding industrial motor-control applications where simple fixed-speed operation is not sufficient.

The series can be used for variable-speed applications, heavy industrial machinery, process equipment, pumps, fans, conveyors, compressors and other large rotating loads.

The 20G11LC2K1JN0NNNNN is not a small machine-level drive. Its approximately 2,150 A rating places it in a very large industrial power category.

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4. Product Introduction

The 20G11LC2K1JN0NNNNN is essentially a high-capacity electronic motor-control system that regulates the electrical power delivered to a large AC motor.

Instead of connecting the motor directly to the electrical supply and allowing it to run at essentially fixed frequency, the drive controls motor speed and operating conditions according to the requirements of the process.

This type of control is particularly valuable for large industrial equipment.

For example, a large pump may not need to operate at maximum speed throughout an entire production cycle. A large fan may need different airflow at different times. A conveyor may need a controlled acceleration profile to prevent sudden mechanical stress.

The drive provides the electrical control platform needed to handle these operating requirements.

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5. Main Electrical Characteristics

The most important electrical characteristics of this model are shown below.

The 2,150 A current rating is especially important when selecting this drive.

At this current level, the electrical installation becomes a major engineering project. Incoming conductors, protective devices, busbars, disconnects, grounding, cabinet ventilation and motor connections all need to be designed accordingly.

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6. Power Ratings

This configuration has three major duty classifications.

These ratings provide flexibility because industrial loads do not all behave in the same way.

A centrifugal pump generally has different torque characteristics from a heavily loaded conveyor.

A fan has different operating requirements from a crusher or high-inertia mechanical system.

Therefore, the correct rating should always be selected according to the actual motor nameplate current and load profile.

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7. Light-Duty Application — 1,400 kW Class

The approximately 1,400 kW light-duty rating is particularly attractive for large variable-torque applications.

Typical examples include:

• Large centrifugal pumps
• Large industrial fans
• Cooling-water pumps
• Process-water pumps
• Large blowers
• Industrial ventilation systems
• Water-transfer equipment
• Large circulation systems

Variable-speed operation can allow the equipment to operate closer to the actual process requirement rather than continuously running at maximum speed.

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8. Normal-Duty Application — 1,250 kW Class

The approximately 1,250 kW normal-duty rating is suitable for large industrial applications where the motor experiences substantial but relatively predictable operating demand.

Potential applications include:

• Large process pumps
• Industrial fans
• Blowers
• Large conveyors
• Material-handling equipment
• Cooling equipment
• Process machinery

The normal-duty rating should be compared with the actual motor full-load current rather than selected only according to motor kW.

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9. Heavy-Duty Application — 1,000 kW Class

The approximately 1,000 kW heavy-duty rating is useful for applications where greater torque demand or more demanding acceleration conditions exist.

Potential applications include:

• Heavy conveyors
• High-inertia machinery
• Constant-torque equipment
• Material-handling systems
• Heavy industrial processing equipment
• Large mechanical systems requiring controlled acceleration

For these applications, starting torque, acceleration time, inertia and overload requirements should all be reviewed.

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10. Product Applications

10.1 Large Pump Systems

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

Typical installations include:

• Industrial water pumping
• Cooling-water circulation
• Process-water systems
• Wastewater treatment
• Water-transfer stations
• Utility pumping
• Large process pumps

The drive can regulate pump speed according to flow, pressure or other process requirements.

This makes it possible to operate a pump more flexibly than a simple fixed-speed arrangement.

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10.2 Large Fans

Large industrial fans often operate under changing process conditions.

Applications can include:

• Factory ventilation
• Furnace exhaust
• Process ventilation
• Combustion-air systems
• Cooling systems
• Large air-handling equipment
• Dust extraction

The drive allows the fan motor speed to be adjusted according to airflow requirements.

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10.3 Large Blowers

Large blowers can require very high motor power.

Typical applications include:

• Process air
• Aeration systems
• Combustion air
• Industrial ventilation
• Dust collection
• Process-gas movement
• Air supply systems

The high current capacity of the drive makes it suitable for evaluation in large blower applications.

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10.4 Heavy Conveyors

Large conveyors can present substantial mechanical inertia.

A controlled acceleration profile can reduce sudden torque transmission through the motor, gearbox, coupling and conveyor structure.

Potential applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk-material handling
• Port equipment
• Heavy material transport

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10.5 Mining Equipment

Mining equipment frequently uses large motors and demanding mechanical loads.

Possible applications include:

• Mine dewatering pumps
• Large conveyors
• Ventilation fans
• Material-handling machinery
• Processing equipment
• Large auxiliary machinery

For mining installations, environmental factors such as dust, temperature, altitude and vibration must be considered separately.

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10.6 Cement and Aggregate Plants

Large cement and aggregate facilities use many high-power motors.

Possible applications include:

• Process fans
• Blowers
• Conveyors
• Pumps
• Cooling equipment
• Material-handling equipment
• Industrial ventilation

The high-power capability of the 20G11LC2K1 configuration makes it suitable for consideration in these environments.

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11. Product Advantages

11.1 Very High Current Capacity

The approximately 2,150 A rating is the defining characteristic of this model.

It allows the drive to control motors that are far beyond the capacity of ordinary low- and medium-power drives.

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11.2 Megawatt-Class Motor Control

The drive supports approximately:

• 1,400 kW light duty
• 1,250 kW normal duty
• 1,000 kW heavy duty

This places it firmly in the large industrial motor-control category.

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11.3 Variable-Speed Operation

Variable-speed operation allows the motor to follow the actual process requirement.

This is useful for:

• Pumps
• Fans
• Blowers
• Conveyors
• Process machinery

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11.4 Controlled Acceleration

A large motor can create considerable mechanical and electrical stress during starting.

Controlled acceleration allows the motor to reach operating speed progressively.

This can help reduce mechanical shock throughout the drivetrain.

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11.5 Controlled Deceleration

The drive can also control the motor’s deceleration.

This is useful when large rotating equipment needs to stop in a predictable manner.

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11.6 Industrial Communication

Embedded EtherNet/IP allows the drive to communicate with an industrial automation system.

Typical information can include:

• Start commands
• Stop commands
• Speed reference
• Actual speed
• Current
• Frequency
• Drive status
• Warning conditions
• Fault information
• Reset commands

This can make centralized monitoring and control easier.

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11.7 Large-Frame Industrial Construction

The 800 mm deep MCC-style arrangement is intended for substantial industrial installations.

This makes the product more suitable for large electrical rooms and industrial motor-control lineups than compact machine-mounted drives.

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12. Communication and Automation

The embedded EtherNet/IP capability is one of the useful features of the PowerFlex 755 architecture.

The drive can participate in a larger automation system rather than operating as an isolated motor controller.

For large production systems, this type of communication can simplify centralized operation and diagnostics.

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13. Mechanical Parameters

The product is identified as an 800 mm deep MCC-style configuration.

This is an important mechanical characteristic because large drives need substantial installation space.

The 800 mm depth should be treated as a key planning dimension.

The final overall width and height should be taken from the mechanical configuration supplied for the specific unit.

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14. Weight Information

For a product in this power range, giving a guessed weight would be misleading.

The final weight can vary according to the cabinet arrangement, installed components, power section configuration and shipping arrangement.

Therefore:

For transport and structural calculations, the final configured product’s certified mechanical data should always be used.

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15. Complete Technical Specification Table

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16. Five Same-Series or Closely Related Models

The following models are useful comparison candidates within the same PowerFlex 755 family and nearby high-power configurations.

The first three are particularly useful when comparing configurations around the same 400 VAC high-power platform.

The final characters in a catalog number can represent configuration choices, so a similar-looking catalog number should not automatically be treated as a direct replacement.

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17. Five Additional Related Models

These models are useful for evaluating different current, voltage and configuration requirements.

They should be considered comparison models rather than guaranteed drop-in substitutes.

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18. Five Representative Popular Models from the Same Brand

For a broader product comparison, the following are representative industrial-drive models from the same brand and product ecosystem.

These models are useful when building a comparison list for large industrial drive applications.

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19. Comparison Between 20G11LC2K1JN0NNNNN and 20G11LC2K1AN0NNNNN

One important comparison is between the JN0 and AN0 configurations.

The electrical capacity is essentially the same class.

The difference is primarily associated with the specific catalog configuration and option arrangement.

For replacement work, the complete catalog number should therefore be matched rather than assuming that two models with the same current rating are identical.

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20. Comparison With 20G11LC1K6JN0NNNNN

The main advantage of the 20G11LC2K1JN0NNNNN is its significantly greater current and power capacity.

For a motor approaching the upper range of the smaller configuration, moving to the 2,150 A class can provide considerably more capacity.

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21. Important Application Considerations

Motor Current

Motor nameplate current should be one of the first selection criteria.

A motor’s kW rating alone is not sufficient.

The following should also be considered:

• Full-load current
• Motor voltage
• Motor frequency
• Starting torque
• Load torque
• Overload requirement
• Acceleration time
• Deceleration time
• Motor inertia
• Operating speed range

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Load Characteristics

Different loads require different drive ratings.

This is why the heavy-duty, normal-duty and light-duty classifications are important.

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22. Cooling and Installation

The drive uses forced-air cooling.

At this power level, the cooling system needs to be treated as an important part of the installation.

The electrical room or enclosure arrangement should provide adequate ventilation.

Important factors include:

• Ambient temperature
• Airflow
• Dust
• Humidity
• Altitude
• Heat accumulation
• Fan condition
• Cabinet ventilation
• Clearance around the equipment
• Maintenance access

A high-power drive should not be installed in an environment where hot exhaust air can circulate back into the cooling intake.

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23. Maintenance Advantages

The PowerFlex 755 architecture is suitable for installations where monitoring and maintenance are important.

A maintenance program can monitor:

• Cooling fans
• Electrical connections
• Drive temperature
• Fault history
• Motor current
• Motor operating frequency
• Network communication
• Cabinet ventilation
• Mechanical vibration
• Abnormal motor loading

For large production facilities, predictive or preventive maintenance can be particularly valuable because a drive failure can interrupt a significant portion of the production process.

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24. Suitable Industries

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25. Main Advantages at a Glance

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26. Recommended Selection Approach

If the intended application is a large pump, start with the motor nameplate current and determine whether the load is variable torque.

If the application is a large fan or blower, determine the required speed range and process airflow requirements.

If the application is a conveyor, pay particular attention to starting torque, acceleration time and mechanical inertia.

If the application is a replacement project, compare the complete existing catalog number instead of selecting a replacement based only on kW.

The following checklist is useful:

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27. Final Technical Summary

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28. Overall Product Evaluation

The 20G11LC2K1JN0NNNNN is a high-capacity PowerFlex 755 drive intended for large industrial motor systems.

Its approximately 2,150 A current capacity and 1,400 kW light-duty / 1,250 kW normal-duty / 1,000 kW heavy-duty ratings make it suitable for applications far beyond the range of conventional compact variable frequency drives.

The model is particularly appropriate for large pumps, industrial fans, blowers, conveyors, mining equipment, cement equipment, water-treatment machinery, cooling systems and other high-power rotating equipment.

The 800 mm deep MCC-style construction is another important characteristic. It indicates that this is intended to be installed as part of a substantial industrial electrical system rather than as a small machine-mounted drive.

The embedded EtherNet/IP capability also makes the unit suitable for integration into a modern industrial control architecture.

For engineering selection, however, the most important point is to match the drive to the actual motor nameplate current and load characteristics. The nominal kW figure should not be used as the only selection criterion.

For the physical installation, the 800 mm depth is the identifiable mechanical dimension. The exact overall height, width and weight in kg depend on the final packaged configuration, so those values should be confirmed from the actual mechanical documentation rather than filled with an estimated figure.

Overall, this is a very-high-power industrial AC drive configuration, best suited to large, continuously operating motor systems where controlled speed, process flexibility, network integration and reliable large-motor operation are important.