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20G11LC910JN2NNNNN — Detailed Product Specifications, Product Introduction, Applications, Advantages and Related Model Recommendations

1. Product Overview

The 20G11LC910JN2NNNNN is a high-power industrial AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase AC motor applications where high output current, variable-speed operation, reliable torque control, industrial networking, and flexible system integration are required.

This model is a 400 VAC, three-phase, 910 A, Frame 9 drive. Its published power ratings are 560 kW for Low Duty, 500 kW for Normal Duty, and 400 kW for Heavy Duty.

The unit uses an air-cooled construction, an IP20 / NEMA Type 1 enclosure, and an 800 mm deep MCC-style cabinet arrangement. It also includes an Enhanced LCD, full-numeric, handheld/local HIM, which is particularly useful during commissioning, maintenance, parameter adjustment, and troubleshooting.

The product is intended primarily for large industrial machinery rather than small or medium-sized standalone equipment. Typical applications include large conveyors, pumps, fans, compressors, material-handling systems, processing machinery, mining equipment, and other high-power motor-driven equipment.

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2. Brand and Product Series

The most important identification is therefore:

Allen-Bradley → PowerFlex → PowerFlex 755 → 20G → 20G11LC910JN2NNNNN

This places the product in the high-power end of the PowerFlex 755 family.

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3. Main Technical Parameters

The electrical rating is the most important part of the selection. At 910 A, this is a very high-current drive designed for large motor systems.

The exact physical weight can vary with cabinet arrangement and installed options. For engineering planning, the final mechanical configuration should be used when determining transportation, lifting, floor loading, and installation requirements.

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4. Product Configuration

The model number 20G11LC910JN2NNNNN identifies a particular combination of electrical and mechanical characteristics.

The 910 portion is especially important because it identifies the high-current configuration.

The JN2 configuration also indicates the version equipped with the enhanced local operator interface. This makes the model more convenient for applications where maintenance personnel need direct access to the drive.

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5. Product Introduction

The 20G11LC910JN2NNNNN is designed to control large AC motors by continuously regulating the voltage and frequency supplied to the motor.

A conventional fixed-speed motor starter generally provides a relatively simple starting and stopping function. A variable frequency drive provides much greater control over the motor.

The drive can regulate motor speed, acceleration, deceleration, torque, and operating conditions according to the requirements of the machine.

For example, a large conveyor does not necessarily need to accelerate instantly to full speed. A controlled acceleration profile can reduce mechanical stress on the belt, gearbox, coupling, and driven equipment.

Likewise, a large pump does not always need to run at maximum speed. Variable-speed operation can allow the pump to respond to changing process requirements.

This flexibility is one of the main reasons the PowerFlex 755 family is suitable for large industrial automation systems.

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6. High-Power Capability

The 910 A current rating is the most significant characteristic of this model.

The drive has three major power classifications:

These ratings should not be treated as interchangeable.

A machine with a relatively stable load may be evaluated using the Normal Duty rating, while a machine requiring substantial overload capability or high starting torque may need to be evaluated against the Heavy Duty rating.

For this reason, selecting a drive based only on the motor’s kW rating is not recommended.

The motor nameplate current, operating profile, acceleration requirements, overload requirements, ambient conditions, and actual machine load should all be considered.

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7. Input and Output Characteristics

The drive is designed for a 400 VAC three-phase input.

The input section incorporates precharge functionality, and the configuration includes DC terminals.

The output provides controlled three-phase AC power to the motor.

The basic operating concept can be summarized as:

Three-phase AC input → Drive power conversion → Controlled variable-frequency AC output → Motor

The output frequency can be adjusted to control motor speed.

The output voltage and frequency are controlled according to the selected motor-control strategy and operating requirements.

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8. Enhanced LCD Local HIM

One of the useful characteristics of the JN2 configuration is the Enhanced LCD full-numeric handheld/local HIM.

This provides a direct interface between the technician and the drive.

It can be particularly useful for:

• Initial commissioning
• Parameter setup
• Local monitoring
• Fault investigation
• Alarm checking
• Drive status inspection
• Maintenance
• Troubleshooting
• Parameter adjustment
• Local diagnostic work

For a large industrial installation, having a local interface can save considerable time during maintenance.

A technician does not always need to return to the central control room simply to check the drive’s basic status or investigate a fault.

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9. Embedded EtherNet/IP Communication

The product incorporates an embedded EtherNet/IP interface.

This allows the drive to become part of a larger industrial automation network.

Typical information exchanged with a controller can include:

This is particularly valuable in large plants where drives are not independent devices but are part of a complete production system.

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10. Motor-Control Capability

The PowerFlex 755 platform is designed for advanced AC motor control.

Depending on the motor and configuration, the platform can support control approaches such as:

• V/Hz control
• Sensorless vector control
• Vector control
• FORCE technology
• Permanent-magnet motor control
• Feedback-based motor control

The actual control method should be selected according to the motor type and machine requirements.

A centrifugal fan, for example, normally has very different control requirements from a high-inertia conveyor or a heavy-duty crusher.

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11. Product Applications

11.1 Large Conveyor Systems

Large conveyors are an excellent application for this type of drive.

Typical applications include:

• Mining conveyors
• Bulk material conveyors
• Port handling systems
• Cement conveyors
• Steel plant conveyors
• Production-line conveyors
• Ore handling systems

Controlled acceleration can reduce mechanical shock during startup.

Controlled deceleration can also help reduce stress on the mechanical transmission system.

For long conveyors, speed control can be particularly useful because the operating speed may need to change according to upstream and downstream equipment.

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12. Mining Equipment

The high-current capability makes the drive suitable for heavy industrial mining applications.

Potential applications include:

• Belt conveyors
• Ore handling
• Material transfer
• Crushers
• Screens
• Dewatering pumps
• Ventilation fans
• Processing equipment

Mining machinery often has high starting torque and substantial mechanical inertia.

The correct duty rating therefore needs to be evaluated carefully.

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13. Large Pump Systems

Large pumps are another major application.

The drive can be considered for:

• Water treatment
• Industrial water circulation
• Cooling-water systems
• Process pumps
• Mining dewatering
• Wastewater systems
• Large transfer pumps
• Chemical-process pumps

Variable-speed operation can help the motor operate at a speed appropriate to the actual process requirement.

This can be especially useful when flow or pressure requirements change throughout the operating cycle.

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14. Fans and Blowers

Large industrial fans and blowers can also benefit from variable-speed operation.

Possible applications include:

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

Fan applications are often suitable for variable-speed operation because the required airflow can change significantly during production.

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15. Compressor Applications

Large compressors can require substantial motor power.

The drive can be considered for:

• Industrial compressors
• Process compressors
• Large air systems
• Gas-handling machinery
• Certain refrigeration-related systems

The actual suitability depends on the compressor type and the motor’s torque-speed characteristics.

Compressor manufacturers may also specify particular starting, stopping, speed-range, and overload requirements.

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16. Steel and Metal Processing

Large steel and metal processing equipment can require high motor torque and controlled speed.

Potential applications include:

• Material handling
• Steel processing
• Large production machinery
• Rolling-related equipment
• Transfer systems
• Processing lines

The drive can provide the variable-speed capability required for coordinated industrial production.

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17. Cement and Building-Material Equipment

Cement and bulk-material plants frequently use large motors.

Possible applications include:

• Conveyors
• Large fans
• Crushers
• Pumps
• Material handling
• Processing machinery
• Dust extraction systems

The high current rating makes this model more appropriate for major equipment than compact drive products.

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18. Product Advantages

18.1 910 A High-Current Capacity

The first major advantage is the 910 A output rating.

This allows the drive to control large motors that would be beyond the practical range of compact variable-frequency drives.

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18.2 500 kW Normal Duty Capability

The 500 kW Normal Duty rating makes this model suitable for large industrial machinery.

This provides a practical solution for large motors used in continuous production systems.

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18.3 400 kW Heavy Duty Capability

The 400 kW Heavy Duty rating is important for applications where additional overload capability is required.

This makes the product more appropriate for demanding machinery than a drive that is selected only according to its basic kW rating.

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18.4 560 kW Low Duty Capability

The 560 kW Low Duty rating provides additional flexibility for applications with lower overload requirements.

The three different duty classifications allow engineers to select the appropriate rating according to the actual machine load.

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18.5 Enhanced Local Interface

The Enhanced LCD full-numeric local HIM is a practical advantage for maintenance and commissioning.

It allows technicians to work directly at the drive rather than depending entirely on remote control equipment.

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18.6 Embedded Industrial Networking

The embedded EtherNet/IP interface allows the drive to communicate with an industrial control system.

This is useful for centralized monitoring, machine sequencing, diagnostics, and process control.

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18.7 Expandable Architecture

The PowerFlex 755 architecture provides space and functionality for additional options.

Depending on the application, the system can be expanded with:

• Additional I/O
• Feedback interfaces
• Safety functions
• Communication modules
• Other control-related options

This makes the platform more flexible than a basic fixed-function VFD.

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19. Dimensions and Weight

Because this is a Frame 9, IP20, 800 mm-deep MCC-style configuration, physical installation is an important consideration.

The exact final dimensions and weight can depend on the complete configuration.

For transportation and installation, the actual configured equipment should be checked against the final mechanical drawing.

The approximately 1,200–1,250 kg weight range is therefore best regarded as a planning value rather than a guaranteed shipping weight.

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20. Installation Requirements

A drive of this size requires considerably more installation planning than a small VFD.

Important considerations include:

Electrical capacity

The incoming electrical system must have sufficient capacity for the motor and drive.

The engineer should evaluate:

• Transformer capacity
• Incoming protection
• Short-circuit conditions
• Cable sizing
• Grounding
• Motor cable sizing
• Harmonic effects
• Input switching equipment
• Electrical clearances

Mechanical installation

Because the equipment is approximately 2.45 m high and weighs around 1.2 tonnes, the installation should consider:

• Floor loading
• Transportation route
• Lifting equipment
• Cabinet positioning
• Door access
• Maintenance clearance
• Cable routing
• Ventilation

Thermal management

The drive is air cooled and therefore requires appropriate airflow.

The installation should provide adequate ventilation and should not allow excessive dust or other contaminants to accumulate around the cooling system.

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21. Environmental Considerations

The standard enclosure is IP20 / NEMA Type 1.

This is primarily intended for protected indoor industrial environments.

For installations involving:

• Heavy dust
• Water exposure
• Outdoor installation
• Corrosive environments
• High humidity
• Hazardous locations

a different enclosure or additional environmental protection may be necessary.

The enclosure rating should always be matched to the actual installation environment.

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22. Recommended Same-Series or Closely Related Models

The following models are useful comparison choices within the PowerFlex 755 family.

These models are not necessarily direct drop-in replacements for one another.

The differences in current rating, duty classification, option configuration, and physical arrangement should be checked before substitution.

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23. Five Related Models — Selection Recommendation

Model 1: 20G11LC900JN2NNNNN

The 20G11LC900JN2NNNNN is a close alternative in the same PowerFlex 755 family.

It is suitable when the required motor current is slightly below the 910 A class.

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24. Model 2: 20G11LC910JN0NNNNN

The 20G11LC910JN0NNNNN is electrically very close to the target model.

The main reason to consider it is the difference in operator-interface configuration.

This is one of the closest alternatives to the target model.

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25. Model 3: 20G11LC910JN4NNNNN

The 20G11LC910JN4NNNNN remains in the same 910 A / 400 V / Frame 9 area but uses a different option configuration.

This type of model is useful when the electrical capacity needs to remain approximately the same but the required configuration differs.

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26. Model 4: 20G11LC1K0JN2NNNNN

The 20G11LC1K0JN2NNNNN is a logical choice when the 910 A rating is insufficient.

This model is more appropriate when the motor current requirement is above approximately 910 A.

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27. Model 5: 20G11LC1K5JN2NNNNN

The 20G11LC1K5JN2NNNNN belongs to the same general high-power family and is aimed at substantially larger motor loads.

This is a much larger-capacity option and should only be selected when the motor and process actually require the additional current capacity.

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28. Five Popular Models from the Same Brand

For a broader selection, the following models represent different areas of the same brand’s variable-frequency-drive range.

The first two models are substantially smaller than the target model and are intended for completely different motor sizes.

They are useful when the application does not justify a large Frame 9 drive.

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29. Comparison of the Main Recommended Models

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30. Advantages Compared with Smaller Drives

The biggest reason to choose the 20G11LC910JN2NNNNN instead of a smaller drive is its ability to handle a very large motor load.

A smaller drive may be more economical and easier to install, but it cannot provide the same 910 A output capacity.

The target model is therefore more appropriate when the application requires:

• Very high motor current
• Large motor power
• High starting torque
• Industrial network integration
• Local operator access
• Advanced motor control
• Expandable I/O
• Feedback capability
• Safety functions
• Large-scale automation integration

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31. Advantages Compared with a Fixed-Speed Starter

A fixed-speed starter can be sufficient for simple applications where the motor only needs to start and stop.

The 20G11LC910JN2NNNNN provides substantially more control.

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32. Practical Benefits in a Production System

For a large production line, the value of the drive is not limited to motor-speed adjustment.

It can become part of the complete control system.

For example, a production system may use a PLC to send a speed reference to the drive.

The drive then controls the motor at the required speed and sends operating information back to the control system.

If the motor begins drawing excessive current, the control system can detect the condition.

If the drive develops a fault, the fault information can be communicated to the supervisory system.

This creates a much more integrated operating environment.

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33. Maintenance Advantages

The local HIM is especially useful for maintenance.

Technicians can use the local interface to investigate operating conditions without necessarily connecting a separate computer.

Typical maintenance activities may include:

• Checking drive status
• Reviewing fault conditions
• Checking operating current
• Checking speed
• Reviewing parameter values
• Adjusting permitted parameters
• Checking warnings
• Confirming operating states

For large equipment located far from the main control room, this can be a significant practical advantage.

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34. Energy-Saving Potential

A variable-frequency drive does not automatically guarantee energy savings in every application.

However, variable-speed operation can provide substantial savings in applications where the process load varies.

This is especially relevant to:

• Centrifugal pumps
• Fans
• Blowers
• Certain ventilation systems

If the machine does not need full speed all the time, reducing motor speed can reduce the energy required by the system.

The actual savings depend on the machine, operating profile, process requirements, motor efficiency, and control strategy.

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35. Suitable Motor Types

The PowerFlex 755 platform can be used with several types of AC motors depending on the exact configuration and control method.

Potential motor applications include:

• Standard induction motors
• High-efficiency induction motors
• Permanent-magnet motors
• Motors requiring feedback
• Motors requiring higher-performance vector control

The exact motor compatibility should always be confirmed against the motor characteristics and selected control mode.

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36. Product Strengths at a Glance

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37. Overall Evaluation

The 20G11LC910JN2NNNNN is best regarded as a large-scale industrial variable-frequency drive for high-power AC motor applications.

Its key specification is the 910 A current rating, supported by 560 kW Low Duty, 500 kW Normal Duty, and 400 kW Heavy Duty power classifications.

The PowerFlex 755 platform provides a combination of high-power motor control, industrial communication, local operation, diagnostics, feedback options, safety options, and expandable architecture.

The inclusion of the Enhanced LCD full-numeric local HIM makes this particular JN2 configuration especially suitable for installations where technicians need convenient access to the drive at the equipment location.

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38. Final Technical Summary

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39. Conclusion

The 20G11LC910JN2NNNNN is a high-capacity PowerFlex 755 drive intended for large industrial motor-control applications.

Its combination of 910 A output current, 500 kW Normal Duty rating, 400 kW Heavy Duty rating, 560 kW Low Duty rating, 400 VAC three-phase input, Frame 9 construction, air cooling, EtherNet/IP communication, and Enhanced LCD local HIM makes it particularly suitable for large automated industrial equipment.

The model is a strong choice when the application requires much more than simple motor starting and stopping.

It is particularly appropriate where motor speed needs to be adjusted according to process conditions, where acceleration and deceleration need to be controlled, where the drive must communicate with a larger automation system, and where technicians need convenient local access for commissioning and maintenance.

For applications requiring a similar electrical capacity, the closest choices are other PowerFlex 755 Frame 9 configurations such as 20G11LC900JN2NNNNN, 20G11LC910JN0NNNNN, and 20G11LC910JN4NNNNN.

When additional motor current is required, the 20G11LC1K0JN2NNNNN or 20G11LC1K5JN2NNNNN can be considered, subject to detailed motor and application sizing.

For substantially smaller machines, the PowerFlex 525 or PowerFlex 753 families may be more appropriate because their physical size, power capacity, installation requirements, and overall system cost can be better matched to smaller motor applications.

For the target application, however, the 20G11LC910JN2NNNNN is fundamentally a large, high-current, high-power industrial drive designed for serious motor-control duties and large-scale automation systems.