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20G11LD1K2AN4NNNNN — Detailed Product Description, Technical Parameters, Applications and Related Models

The 20G11LD1K2AN4NNNNN is a high-power air-cooled AC drive from the PowerFlex 755 family. It is designed for large industrial motors and demanding variable-speed applications where high output current, stable motor control, controlled acceleration and integration with an industrial automation system are required.

For the information below, I have kept the presentation in English, removed web addresses and source lists, and used a practical engineering style. Where mechanical dimensions or weight can vary with the exact enclosure and configuration, the values are identified as approximate/reference values rather than guaranteed shipping dimensions.

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1. Basic Product Information

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2. Product Introduction

The 20G11LD1K2AN4NNNNN is a large-frame AC variable frequency drive intended for high-power motor applications.

Unlike a simple motor starter, a variable frequency drive provides active control over motor speed and operating behavior. The drive regulates the electrical power supplied to the motor so that the motor can accelerate, operate and decelerate according to the requirements of the machine.

The 20G11LD1K2AN4NNNNN belongs to the PowerFlex 755 family and is positioned toward the high-power end of the range.

With an output current rating in the 1135 A class, this is not a small or medium industrial inverter. It is intended for large motors used in heavy machinery, material handling, mining, process equipment, large pumps, fans and other demanding industrial systems.

The large Frame 9 construction provides the physical space required for high-power switching components, bus structures, cooling equipment and high-current connections.

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3. Product Series

The product belongs to the:

PowerFlex 755 Series

The PowerFlex 755 family is designed for industrial AC motor-control applications where flexible speed control, torque control, process integration and advanced diagnostics are important.

The 20G11LD1K2AN4NNNNN represents a high-capacity configuration within this family.

The product is especially suitable for applications where a conventional low-power VFD would be electrically or mechanically inadequate.

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4. Main Electrical Parameters

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5. Power and Horsepower Range

The actual motor capacity should always be selected according to motor nameplate current and load duty rather than horsepower alone.

As a general engineering reference, this 1135 A configuration is associated with approximately the following range:

The difference between these duty categories is important.

A motor driving a relatively easy variable-torque load may have different requirements from a conveyor, crusher, hoist or other application that demands high torque for extended periods.

Therefore, a 1000 HP motor should not automatically be matched to a 1000 HP drive without checking its actual full-load current and overload requirements.

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6. Physical Dimensions

The 20G11LD1K2AN4NNNNN is a large floor-standing industrial drive.

It requires substantially more installation space than compact wall-mounted VFDs.

For preliminary engineering planning, the following values can be used as a practical reference:

The exact cabinet arrangement can change depending on the selected configuration, accessories and installation arrangement.

For final engineering drawings, the exact mechanical configuration should be checked before fabrication of the electrical room or mounting foundation.

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7. Weight

Because this is a very large Frame 9 drive, weight is an important installation consideration.

A reasonable preliminary engineering estimate is:

Approximately 1,200–1,400 kg

For general planning, a value around 1,300 kg can be used as an approximate equipment-handling reference.

The final shipping weight should not be assumed from the catalog number alone.

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8. Product Structure

The model number contains several configuration positions that define the electrical and physical arrangement of the drive.

The important practical characteristics represented by this configuration are:

• PowerFlex 755 family
• 480 VAC class
• High-current Frame 9 construction
• 1135 A output-current class
• Air-cooled design
• Industrial enclosure arrangement
• Enhanced configuration/interface options
• Large motor capability

The AN4 portion is a configuration designation rather than an indication that the drive is a completely different product family.

Therefore, models such as the following can be closely related:

20G11LD1K2AN0NNNNN

20G11LD1K2AN2NNNNN

20G11LD1K2AN4NNNNN

20G11LD1K2JN0NNNNN

20G11LD1K2JN2NNNNN

20G11LD1K2JN4NNNNN

These models share the same general high-power product architecture while differing in configuration options.

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9. Major Product Features

High Output Current

The most important characteristic of the 20G11LD1K2AN4NNNNN is its approximately 1135 A output-current capacity.

This makes it appropriate for very large motors.

The high current capacity is particularly useful in industrial systems where motors may operate continuously under substantial mechanical load.

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Large Motor Compatibility

The drive is designed for large industrial motors rather than small machine motors.

Typical applications may involve motors in the several-hundred-kilowatt range.

This makes it particularly suitable for large rotating equipment.

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Air-Cooled Construction

The drive uses forced-air cooling.

This is a practical approach for large industrial electrical equipment because the cooling system can be integrated into the cabinet installation.

Proper airflow is essential.

Dust accumulation, blocked ventilation and failed cooling fans can cause excessive internal temperature and reduce equipment reliability.

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Large Frame Construction

Frame 9 provides the physical structure required for a high-current drive.

The large enclosure accommodates:

• High-current power connections
• Power switching components
• DC bus components
• Cooling equipment
• Control electronics
• Protective components
• Service access

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10. Product Applications

10.1 Large Conveyor Systems

The 20G11LD1K2AN4NNNNN is well suited to large conveyor applications.

Typical examples include:

• Mining conveyors
• Ore conveyors
• Coal conveyors
• Aggregate conveyors
• Cement conveyors
• Port material-handling conveyors
• Bulk-material transportation
• Long-distance belt conveyors

A large conveyor can have significant mechanical inertia.

Using variable-speed control allows the motor to accelerate progressively rather than immediately applying full operating speed.

This can reduce mechanical shock throughout the drive train.

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11. Mining Applications

Mining machinery often requires very large motors.

Potential applications include:

• Ore handling
• Belt conveyors
• Material transfer
• Mine ventilation
• Large dewatering pumps
• Bulk-material handling
• Processing equipment

The high-current capability makes this type of drive suitable for large mining machinery.

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12. Large Pump Applications

The drive can also be used with large industrial pumps.

Typical applications include:

• Water transfer
• Mine dewatering
• Cooling-water circulation
• Industrial process water
• Wastewater treatment
• Large pumping stations
• Industrial fluid circulation

Variable-speed operation allows pump speed to be adjusted according to process requirements.

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13. Large Fan Applications

Large fans can consume substantial electrical power.

Typical applications include:

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

Variable-speed operation allows airflow to be adjusted according to actual process demand.

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14. Large Blower Applications

The drive can also be considered for high-power blower systems.

Examples include:

• Process air
• Combustion air
• Industrial ventilation
• Dust collection
• Furnace systems
• Manufacturing processes

For these applications, motor speed can be adjusted according to pressure or airflow requirements.

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15. Cement Industry Applications

Large cement plants contain many high-power motors.

Potential applications include:

• Raw-material conveyors
• Large fans
• Exhaust systems
• Material handling
• Grinding-related equipment
• Cooling equipment
• Process ventilation

The ability to control large motors makes this drive appropriate for centralized industrial motor-control systems.

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16. Steel and Metal Processing

Large industrial drives can be used in:

• Material handling
• Cooling systems
• Large pumps
• Ventilation
• Process machinery
• Heavy-duty conveyors

The drive’s large output-current capability is particularly useful where motors operate continuously at high load.

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17. Main Advantages

17.1 High Current Capacity

The 1135 A current class is the primary advantage.

It allows the drive to control motors that would be far beyond the capacity of compact industrial VFDs.

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17.2 Controlled Acceleration

The drive can provide controlled acceleration rather than applying full motor speed immediately.

This is valuable for high-inertia machinery.

Potential benefits include reduced:

• Belt stress
• Gearbox shock
• Coupling stress
• Shaft torque shock
• Mechanical vibration

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17.3 Controlled Deceleration

The motor can also be brought down from operating speed in a controlled manner.

This is particularly useful for large conveyors and process equipment.

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17.4 Adjustable Operating Speed

Instead of operating the motor continuously at one fixed speed, the drive can provide variable-speed operation.

This allows the motor to respond more closely to process requirements.

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17.5 Automation Integration

The drive can be integrated into a larger industrial control system.

A typical control architecture can be represented as:

PLC → Industrial Network → Drive → Motor → Machine

This allows the control system to exchange operating information with the drive.

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17.6 Local Troubleshooting

The operator interface allows technicians to work directly at the drive during commissioning and maintenance.

Typical information can include:

• Drive status
• Motor speed
• Output current
• Fault condition
• Warning condition
• Operating parameters

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18. Maintenance Advantages

Large drives require regular inspection.

The following maintenance activities are particularly important:

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19. Installation Requirements

Because the equipment is approximately 1,300 kg class, installation must be planned carefully.

The installation area should have sufficient:

• Floor strength
• Ventilation
• Electrical clearance
• Maintenance access
• Cable space
• Grounding provisions
• Lifting access

The equipment should not be treated like a small panel-mounted VFD.

A dedicated electrical-room or industrial equipment area is normally more appropriate.

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20. Environmental Considerations

In dusty industrial environments, ventilation and filter maintenance become particularly important.

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21. Five Closely Related Models

The following five models are useful for comparison because they are from the same PowerFlex 755 high-power family or are extremely close configuration variants.

The closest electrical comparison is the 20G11LD1K2JN4NNNNN, because it retains the same general current and voltage class while using a different configuration.

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22. Detailed Comparison of Related Models

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23. Five Recommended Models from the Same Series

1. 20G11LD1K0AN4NNNNN

This is a slightly lower-current configuration.

It can be considered when the motor’s actual current requirement is below the 1135 A level.

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2. 20G11LD1K2AN0NNNNN

This model is very close to the subject product in electrical capacity.

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3. 20G11LD1K2AN2NNNNN

This is another close configuration with the same basic current class.

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4. 20G11LD1K2JN4NNNNN

This is perhaps the most direct comparison to the subject model.

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5. 20G11LD1K3AN4NNNNN

This model provides a higher current capability.

It is suitable for comparison when the motor requires more current than the 1135 A class.

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24. Five Popular Models from the Same Brand

The following models cover different capacity levels, so they are useful for comparison when selecting a drive.

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25. Compact Model Comparison

25B-D2P3N114

This model is designed for a completely different power range.

It is suitable for relatively small motors and compact machinery.

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26. Medium Compact Model

25B-D6P0N114

This model provides a larger capacity than the previous compact model while remaining much smaller than a Frame 9 drive.

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27. Medium Industrial Model

20F11ND077JA0NNNNN

This model belongs to the PowerFlex 753 family.

It is substantially smaller in current capacity than the 20G11LD1K2AN4NNNNN, making it suitable for medium-power industrial motor applications.

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28. Application Selection Guide

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29. Advantages for Large Conveyor Systems

For conveyor systems, one of the most important benefits is controlled acceleration.

A large conveyor may contain a significant quantity of material before the motor reaches full operating speed.

If the motor is started too aggressively, the resulting torque can be transmitted through:

• Gearboxes
• Couplings
• Shafts
• Pulleys
• Belts
• Bearings

A variable frequency drive can provide a more controlled acceleration profile.

This can help reduce mechanical shock and improve the operating behavior of the entire conveyor system.

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30. Advantages for Large Pump Systems

A pump does not necessarily need to operate at full speed at all times.

When process demand changes, variable-speed operation can allow the motor to operate at a more appropriate speed.

Possible benefits include:

• Better process control
• Reduced unnecessary operation at full speed
• Smoother starting
• Reduced hydraulic shock
• Improved operating flexibility

The actual energy-saving potential depends strongly on pump design and system characteristics.

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31. Advantages for Large Fan Systems

Large fans frequently operate for extended periods.

The required airflow may change according to production conditions.

The drive allows the fan motor speed to be adjusted according to:

• Air pressure
• Airflow
• Temperature
• Production rate
• Ventilation demand

This provides significantly more flexibility than a simple fixed-speed motor arrangement.

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32. Automation Integration

The 20G11LD1K2AN4NNNNN can be incorporated into a larger automation system.

A typical arrangement is:

Operator Interface → PLC → Drive → Motor → Mechanical Load

The PLC or control system can issue commands such as:

• Start
• Stop
• Speed reference
• Direction
• Process setpoint
• Reset

The drive can provide information such as:

• Actual speed
• Output current
• Drive status
• Alarm condition
• Fault condition
• Operating state

This makes the drive suitable for large automated production systems.

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33. Maintenance and Service

Large industrial drives require a structured maintenance program.

The following areas should receive particular attention:

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34. Installation and Handling

The approximately 1,300 kg class weight makes transportation and installation an important part of the project.

The installation team should consider:

1. Floor loading.
2. Lifting equipment.
3. Cabinet positioning.
4. Cable-entry arrangement.
5. Ventilation.
6. Maintenance access.
7. Front working clearance.
8. Electrical safety clearance.
9. Grounding.
10. Environmental conditions.

The drive should be installed on a suitable industrial foundation capable of supporting its weight.

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35. Mechanical Summary

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36. Electrical Summary

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37. Overall Product Advantages

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38. Final Technical Assessment

The 20G11LD1K2AN4NNNNN is a high-power PowerFlex 755 AC drive in the 480 VAC, 1135 A, Frame 9 class.

Its intended role is the control of very large industrial AC motors.

The strongest reason to select this model is its combination of high output current, large-motor capability, variable-speed control and industrial automation functionality.

It is particularly appropriate for heavy-duty applications such as large conveyors, mining machinery, pumps, fans, blowers, material-handling systems and other high-power process equipment.

The physical size is substantial.

A preliminary installation plan should allow for approximately 2.4–2.5 m height, 1.0–1.2 m width, 800 mm depth and approximately 1,200–1,400 kg equipment weight, with the final mechanical arrangement verified before installation.

For applications requiring a similar current capacity but a different configuration, 20G11LD1K2AN0NNNNN, 20G11LD1K2AN2NNNNN, and 20G11LD1K2JN4NNNNN are useful comparison models.

For a lower-current requirement, 20G11LD1K0AN4NNNNN is a logical comparison.

For a higher-current requirement, 20G11LD1K3AN4NNNNN provides a higher-capacity option.

When selecting between these models, the most important engineering information is not only motor horsepower. The final selection should consider motor nameplate voltage, full-load current, duty cycle, overload requirement, load type, acceleration time, deceleration time, ambient temperature, altitude, enclosure requirements, cooling conditions, braking requirements and the intended control architecture.

Overall, the 20G11LD1K2AN4NNNNN can be regarded as a heavy-duty, large-frame industrial AC drive intended for high-power motor applications where a compact VFD is no longer sufficient.