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20G11LC910JN4NNNNN — Detailed Product Information, Technical Specifications, Applications and Related Model Recommendations

1. Product Overview

The 20G11LC910JN4NNNNN is a high-power industrial AC variable frequency drive designed for large three-phase motor applications.

It belongs to the PowerFlex 755 product series and is configured as an air-cooled, high-current drive for industrial motor speed and torque control.

This particular configuration is rated for 400 VAC, three-phase input and 910 A output current. Its commonly specified power ratings are 560 kW Low Duty, 500 kW Normal Duty and 400 kW Heavy Duty.

The unit uses a Frame 9 construction with an 800 mm deep MCC-style cabinet, making it a large floor-standing industrial drive rather than a compact wall-mounted inverter.

The JN4 configuration is particularly useful where local operation and maintenance access are important because it incorporates a door-mounted enhanced LCD full-numeric human interface.

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2. Brand and Product Series

The basic product hierarchy can therefore be understood as:

Allen-Bradley → PowerFlex → PowerFlex 755 → 20G → 20G11LC910JN4NNNNN

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3. Basic Technical Specifications

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4. Power Ratings

One of the most important characteristics of this model is that its power rating changes according to the duty classification.

The 500 kW Normal Duty rating is particularly important when selecting the drive for a continuous industrial application.

The 400 kW Heavy Duty rating should be considered when the motor is subjected to demanding acceleration, high starting torque, repeated loading or other conditions requiring greater overload capability.

The 560 kW Low Duty rating is intended for applications where the load profile allows the lower overload requirement associated with the Low Duty classification.

The drive should therefore be selected according to the motor’s actual nameplate current and application duty rather than simply comparing motor kW values.

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5. 910 A Output Current

The 910 A output-current rating is the defining characteristic of this model.

A current rating of this magnitude places the drive in the large industrial-drive category.

It is suitable for applications where the motor may be several hundred kilowatts and where a smaller drive would not provide sufficient current capacity.

Typical equipment that may use this type of drive includes:

• Large conveyors
• Mining machinery
• Large pumps
• Large fans
• Industrial blowers
• Compressors
• Material-handling equipment
• Cement-processing equipment
• Steel-processing machinery
• Large process machinery

For large motors, the motor’s full-load current, overload requirements and operating conditions are generally more useful for drive selection than motor horsepower alone.

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6. 400 VAC Three-Phase Input

The drive is designed around a 400 VAC three-phase industrial power system.

This voltage class is widely used in industrial motor installations.

Because the drive is rated at 910 A, the upstream electrical system needs to be appropriately engineered.

The installation should take into account:

• Incoming power capacity
• Transformer rating
• Short-circuit current
• Protection devices
• Cable or busbar sizing
• Grounding
• Motor cable sizing
• Electrical clearances
• Harmonic considerations
• Cabinet ventilation
• Maintenance access

A drive of this size should normally be treated as part of the complete electrical system rather than as an isolated component.

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7. Physical Construction

The 20G11LC910JN4NNNNN uses a large Frame 9, 800 mm deep MCC-style cabinet arrangement.

This construction provides the physical space necessary for the high-power switching components, cooling system, electrical connections and associated drive equipment.

Important: The physical dimensions and weight of a large packaged drive can vary according to the exact cabinet arrangement, options and shipping configuration. The values above are suitable as preliminary planning figures, not as a substitute for the final mechanical drawing.

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8. Dimensions and Weight

For transportation and installation planning, the physical size of this model is just as important as its electrical specifications.

The drive is substantially larger and heavier than compact variable frequency drives.

For final engineering work, particularly for:

• Floor loading
• Transportation
• Crane selection
• Forklift selection
• Foundation design
• Shipping
• Cabinet layout
• Door clearance
• Maintenance clearance

the exact configured mechanical drawing should be used.

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9. Product Introduction

The 20G11LC910JN4NNNNN is intended to provide variable-speed and variable-torque control for large AC motors.

A conventional motor starter generally provides a relatively simple method of switching a motor on and off.

A variable frequency drive provides much greater control.

It can regulate the motor’s operating speed, acceleration and deceleration and can provide important operating information to the control system.

This is particularly useful in industrial machinery where the motor does not always need to operate at full speed.

For example, a large pump may need different flow rates during different stages of a process.

A conveyor may need a controlled acceleration profile to avoid mechanical shock.

A large fan may need to operate at different speeds according to the ventilation requirement.

The drive provides the electrical control required to manage these operating conditions.

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10. Door-Mounted Human Interface

The JN4 configuration is distinguished by its door-mounted operator interface.

The Enhanced LCD full-numeric HIM allows operators and maintenance personnel to interact with the drive from the front of the cabinet.

This can be particularly useful during:

• Initial commissioning
• Parameter setup
• Motor testing
• Fault investigation
• Maintenance
• Local operation
• Status checking
• Troubleshooting

The interface is specified with an IP54 / NEMA 12 protection class, providing a higher level of protection for the operator interface than an exposed indoor-only interface.

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11. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication capability.

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

Typical information that can be exchanged includes:

This makes the drive suitable for systems in which the motor needs to be integrated with a PLC, HMI or supervisory control system.

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12. Main Product Applications

12.1 Large Conveyor Systems

Large conveyors are one of the most suitable applications for a high-current drive of this type.

Examples include:

• Mining conveyors
• Bulk-material conveyors
• Port conveyors
• Cement conveyors
• Ore-handling conveyors
• Steel-production conveyors
• Large factory conveyors

The drive can provide controlled acceleration and deceleration.

This can help reduce mechanical shock to belts, gearboxes, couplings and other transmission components.

For long conveyors, variable-speed control can also help coordinate material flow.

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13. Mining Applications

Mining equipment often involves large motors and demanding mechanical loads.

Possible applications include:

• Ore conveyors
• Material-transfer systems
• Dewatering pumps
• Ventilation fans
• Processing equipment
• Crushing-related machinery
• Screening equipment
• Bulk-material handling

The high current capacity of the 20G11LC910JN4NNNNN makes it appropriate for large motors used in these applications.

When the driven machine produces severe shock loading or high starting torque, the Heavy Duty rating should be carefully considered.

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14. Large Pump Applications

Large pumps can benefit significantly from variable-speed control.

Possible applications include:

• Water-treatment pumps
• Industrial process pumps
• Cooling-water pumps
• Mining dewatering pumps
• Wastewater systems
• Large transfer pumps
• Circulation systems
• Industrial fluid systems

Instead of continuously operating the motor at maximum speed, the drive can adjust speed according to the required process condition.

This can improve process control and, for suitable variable-torque pump applications, can also reduce energy consumption.

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15. Fan and Blower Applications

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

Typical applications include:

• Furnace ventilation
• Process ventilation
• Industrial exhaust
• Dust extraction
• Cooling systems
• Air-handling systems
• Large process blowers

Variable-speed operation is particularly useful when airflow requirements change.

Instead of controlling airflow primarily through mechanical restriction, the motor speed itself can be adjusted.

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16. Compressor Applications

Large compressors are another possible application.

The drive can be considered for:

• Industrial compressors
• Process compressors
• Large air systems
• Gas-processing machinery
• Certain high-power refrigeration-related systems

Compressor applications should be evaluated carefully because compressor torque characteristics, starting requirements and speed ranges can vary considerably.

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17. Cement and Bulk Material Processing

Large cement and bulk-material facilities use many high-power motors.

Potential applications include:

• Material conveyors
• Large fans
• Process pumps
• Material-handling equipment
• Dust-collection systems
• Processing machinery
• Auxiliary equipment

The large current capacity and industrial communication capabilities make the drive suitable for large production environments.

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18. Steel and Metal Processing

Large steel and metal-processing plants often require controlled motor speed and torque.

Potential applications include:

• Large material conveyors
• Processing lines
• Cooling equipment
• Transfer machinery
• Large fans
• Auxiliary process systems

Network communication is particularly useful when several drives need to work together as part of a coordinated production line.

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19. Product Advantages

19.1 Very High Current Capacity

The 910 A rating is the primary advantage.

It allows the drive to control very large AC motors that would be outside the practical range of smaller VFDs.

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19.2 High Power Capability

The 500 kW Normal Duty rating allows the drive to serve large industrial loads.

This makes it appropriate for large production machinery rather than small standalone motor applications.

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19.3 Heavy-Duty Capability

The 400 kW Heavy Duty rating provides a useful operating reference for demanding applications.

Heavy-duty applications may involve:

• High starting torque
• High inertia
• Frequent acceleration
• Frequent deceleration
• Shock loading
• Rapid changes in load

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19.4 Door-Mounted Interface

The door-mounted HIM is a practical maintenance advantage.

Operators do not need to access the internal cabinet simply to view drive information or perform routine local operations.

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19.5 Industrial Communication

Embedded EtherNet/IP provides straightforward integration into industrial automation systems.

This can simplify coordination between the drive and other automation equipment.

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19.6 Expandable Platform

The PowerFlex 755 architecture supports additional options for applications requiring more advanced functionality.

Depending on the final configuration, the platform can accommodate additional:

• I/O
• Feedback
• Safety functions
• Communication
• Control functions
• Application-specific options

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19.7 Suitable for Large Industrial Installations

The Frame 9 construction is designed for applications where a compact drive is no longer practical.

This makes the model appropriate for large production plants, processing facilities and heavy industrial equipment.

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20. Typical Application Selection

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21. Five Recommended Models from the Same Series or Closely Related Range

The following models are useful comparison candidates when evaluating alternatives around the PowerFlex 755 platform.

Because the final suffixes of these catalog numbers determine specific options, the alternatives should be treated as selection references rather than automatic drop-in replacements.

The first three are particularly close to the target model because they remain in the same 910 A / Frame 9 / 400 V class.

The last two are useful when the required current is somewhat lower or higher.

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22. Comparison of the Closest 910 A Models

The main reason to choose the JN4 configuration is the operator-interface arrangement rather than a fundamentally different electrical power class.

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23. Five Popular Models from the Same Brand

The following models represent different power levels and product categories within the same brand family and can be considered when the 910 A drive is either too large or too small for the application.

The first two models are designed for much smaller motors and should not be considered direct replacements for the target model.

They are included as useful examples of the same brand’s broader drive range.

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24. Small-Motor Alternative — 25B-D2P3N114

The 25B-D2P3N114 is intended for applications that are dramatically smaller than the 910 A target drive.

This model is useful where the target 910 A drive would be substantially oversized.

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25. Small/Medium Application Alternative — 25B-D6P0N114

The 25B-D6P0N114 is another compact option.

It is intended for a completely different motor-size range from the 20G11LC910JN4NNNNN.

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26. Medium/High-Power Alternative — 20F11ND077JA0NNNNN

The 20F11ND077JA0NNNNN belongs to the PowerFlex 753 family.

This is a much smaller power class and should be selected only when the motor requirements are significantly below the 910 A level.

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27. Important Difference Between PowerFlex 753 and PowerFlex 755

The PowerFlex 753 and PowerFlex 755 families are closely related but are not simply interchangeable products.

The PowerFlex 755 platform is particularly appropriate when the application requires more advanced architecture, larger power levels, greater feedback flexibility or more sophisticated motion and motor-control functionality.

The PowerFlex 753 family can be a practical choice for many general-purpose industrial applications where the additional capabilities of a larger 755 installation are unnecessary.

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28. Application Advantages of the PowerFlex 755 Platform

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29. Energy Efficiency Considerations

The use of a variable frequency drive can provide energy savings in appropriate applications.

The greatest potential is generally associated with variable-torque loads such as centrifugal pumps and fans.

For these machines, reducing motor speed can substantially reduce the mechanical power required by the process.

For constant-torque applications such as conveyors, the primary benefit may instead be improved process control, soft starting, controlled stopping and reduced mechanical stress.

Therefore, the energy benefit should always be evaluated against the actual load profile.

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30. Maintenance Advantages

The large size of the drive means that maintenance planning is important.

The door-mounted operator interface makes routine diagnosis more convenient.

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31. Installation Requirements

Because this is a high-power Frame 9 drive, installation should be treated as a major electrical and mechanical project.

Important factors include:

Electrical

• Correct incoming voltage
• Appropriate transformer capacity
• Correct overcurrent protection
• Correct conductor sizing
• Proper grounding
• Appropriate motor cable
• Short-circuit coordination
• Harmonic considerations
• Motor insulation considerations

Mechanical

• Floor loading
• Cabinet positioning
• Transportation route
• Lifting equipment
• Door clearance
• Service access
• Ventilation
• Cable-entry space

Environmental

• Ambient temperature
• Humidity
• Dust
• Chemical contamination
• Altitude
• Air quality
• Cooling conditions

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32. Model Selection Checklist

Before replacing or purchasing this drive, the following information should be collected from the motor and machine.

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33. Recommended Model Comparison

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34. Main Advantages of the 20G11LC910JN4NNNNN at a Glance

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35. Overall Product Evaluation

The 20G11LC910JN4NNNNN is a large-capacity industrial AC drive intended for applications where the motor power, current requirement and process-control requirements are all substantial.

Its most important electrical specification is the 910 A output current.

Its 500 kW Normal Duty rating makes it appropriate for many large continuous-duty industrial machines, while the 400 kW Heavy Duty rating provides a reference for applications where the motor experiences more demanding overload conditions.

The 560 kW Low Duty rating provides another operating category for suitable load profiles.

The physical construction is equally significant.

With a Frame 9, 800 mm deep MCC-style configuration, the product requires considerably more installation space than compact drives. Its approximate 2,450 mm height, 1,200 mm-class width and approximately 1,200 kg-class weight should be considered when planning transportation, floor loading and maintenance access.

The door-mounted enhanced LCD full-numeric interface is one of the most practical features of the JN4 configuration.

For large conveyors, mining equipment, pumps, fans, blowers, compressors, cement machinery, material-handling systems and other large industrial motor applications, this configuration provides a combination of high-current capacity, variable-speed control, local operation, industrial networking and expandable control functionality.

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36. Final Specification Summary

In summary, the 20G11LC910JN4NNNNN is a high-current, high-power PowerFlex 755 drive intended for large industrial motor systems. Its 910 A current rating, 500 kW Normal Duty capability, Frame 9 construction, 800 mm cabinet depth, air cooling, embedded EtherNet/IP and door-mounted operator interface make it particularly suitable for large-scale industrial automation and process equipment.