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1. Product Identification

2. Product Introduction

The 20G11LF1K0JN0NNNNN is a high-power AC variable frequency drive from the PowerFlex 755 family.

It is designed for large industrial motor systems where a conventional starter is not sufficient and where the process requires adjustable motor speed, controlled acceleration, motor monitoring and integration with an industrial automation system.

With a nominal current capability of approximately 1040 A and a 690 VAC voltage class, this is a very large industrial drive intended for high-power applications.

Its power capability is approximately 1,100 kW for Light Duty, 1,000 kW for Normal Duty and 900 kW for Heavy Duty.

This makes the unit particularly suitable for large pumps, fans, blowers, conveyors, compressors, crushers, mixers and other process machines driven by very large AC motors.

3. Brand and Series

The product belongs to the Allen-Bradley PowerFlex 755 series.

The PowerFlex 755 family is positioned toward demanding industrial motor-control applications.

Compared with smaller compact drives, the PowerFlex 755 platform is intended for applications where the motor, mechanical system and process have considerably higher power requirements.

The 20G11LF1K0JN0NNNNN represents a high-power configuration within this product family.

Its 690 VAC rating and 1040 A current class make it appropriate for large-scale industrial installations.

4. Main Technical Parameters

5. Electrical Rating

The most important electrical characteristic of this model is its 1040 A current rating.

This current level places the product in the very-high-power category.

The drive can be used with large 690 VAC motors where the required current is within the drive’s applicable rating and where the selected duty rating matches the actual load.

The three main power ratings are summarized below.

6. Light-Duty Operation

The Light-Duty rating reaches approximately 1,100 kW.

Light-Duty operation is normally associated with applications where the motor does not continuously experience severe overload conditions.

Large fans, blowers and selected pumping applications can often fall into this type of load category, provided that the actual motor current and operating profile are suitable.

The final drive selection should always be based on the motor nameplate current and actual load requirements rather than power alone.

7. Normal-Duty Operation

The Normal-Duty rating is approximately 1,000 kW.

This rating is suitable for many large industrial machines with relatively predictable operating loads.

Examples can include:

• Large pumps
• Industrial fans
• Large blowers
• Material-handling equipment
• Large conveyors
• Process machinery

8. Heavy-Duty Operation

The Heavy-Duty rating is approximately 900 kW.

Heavy-duty applications require more attention to overload, acceleration torque and process conditions.

Potential applications include:

• Crushers
• Heavy conveyors
• Mining equipment
• Large mixers
• High-inertia machinery
• Heavy material-processing equipment

9. Physical Parameters

The mechanical configuration is particularly important for a drive of this power level.

The model is associated with an 800 mm deep MCC-style construction.

The exact overall width and height can depend on the final mechanical configuration, installation arrangement and associated equipment.

10. Why the Weight Is Listed as Configuration-Dependent

The total physical weight of a high-power drive installation can vary according to the final assembly.

For example, the completed installation may involve different cabinet arrangements, power sections, mounting arrangements and associated components.

For this reason, it would be misleading to provide a single kilogram value without confirming the exact mechanical build.

For transportation and installation planning, the actual equipment nameplate or mechanical drawing should be used.

The safe technical presentation is therefore:

Weight (kg): Configuration-dependent.

This avoids using a potentially incorrect value for lifting or structural calculations.

11. Product Construction

The drive is designed as a large industrial power-electronics system.

The basic power-conversion process can be understood as:

Three-Phase AC Supply → Power Conversion Section → Variable-Frequency Output → Three-Phase AC Motor

The drive controls the electrical output supplied to the motor.

By adjusting output frequency and voltage, the motor can be operated at different speeds according to the requirements of the process.

12. Variable-Speed Control

One of the most important advantages of the product is variable-speed operation.

A motor does not always need to operate continuously at full speed.

For example, a pump may require lower flow during part of the production cycle.

A fan may only need reduced airflow.

A conveyor may need different speeds depending on material throughput.

The drive can provide a speed reference that allows the motor to operate according to the actual process requirement.

13. Controlled Acceleration

Large motors can create substantial mechanical stress when started abruptly.

A variable frequency drive allows the motor to accelerate in a controlled manner.

This can help reduce sudden loading on:

• Motor shafts
• Couplings
• Gearboxes
• Bearings
• Belts
• Conveyor structures
• Pump components
• Fan assemblies

14. Large Pump Applications

The 20G11LF1K0JN0NNNNN can be considered for very large pump systems.

Typical applications include:

• Industrial water transfer
• Cooling-water systems
• Process-water systems
• Wastewater systems
• Mining dewatering
• Large circulation systems
• Industrial pumping stations
• Process pumps

Pump Application Benefits

15. Large Fan Applications

Large industrial fans often operate under changing process conditions.

Running a large fan continuously at maximum speed may not always be necessary.

Variable-speed control allows the fan to operate at an appropriate speed.

Typical applications include:

• Industrial ventilation
• Furnace ventilation
• Exhaust systems
• Dust collection
• Mining ventilation
• Cooling systems
• Process-air systems
• Large air-handling equipment

16. Conveyor Applications

Heavy conveyors can have very high inertia.

Starting a large conveyor suddenly can result in significant mechanical stress.

The drive can provide controlled acceleration and adjustable running speed.

Potential applications include:

• Mining conveyors
• Ore conveyors
• Bulk-material conveyors
• Cement conveyors
• Aggregate conveyors
• Long-distance conveyors
• Heavy-duty material-handling systems

Conveyor Benefits

17. Mining Applications

The high current capacity makes this type of drive appropriate for consideration in large mining systems.

Potential applications include:

• Large conveyors
• Dewatering pumps
• Ventilation fans
• Crushers
• Ore-handling equipment
• Mineral-processing machinery
• Bulk-material systems

18. Crusher Applications

Crushers can experience changing torque requirements.

When hard material enters the crushing mechanism, motor loading can increase considerably.

A properly selected high-power drive can provide controlled acceleration and speed management.

Potential applications include:

• Mining crushers
• Aggregate crushers
• Mineral-processing equipment
• Cement-processing equipment
• Bulk-material processing systems

19. Compressor Applications

Large industrial compressors can require very high motor power.

A variable-speed drive can allow compressor operation to follow process demand.

Potential applications include:

• Industrial compressors
• Process compressors
• Gas-processing equipment
• Large process plants
• Industrial production systems

20. Mixer Applications

Large mixers can require high starting torque, especially when material is already present in the mixing chamber.

Variable-speed control allows controlled acceleration and adjustable mixing speed.

Possible applications include:

• Chemical processing
• Cement production
• Mineral processing
• Industrial mixing
• Bulk-material processing

21. Main Product Advantages

21.1 Very High Current Capacity

The 1040 A current rating is the defining characteristic of this model.

It allows the drive to control motors that are far beyond the practical range of compact industrial drives.

This makes it appropriate for very large process machinery.

21.2 High Power Capability

The drive supports three useful duty levels.

21.3 690 VAC Operation

The 690 VAC class is particularly useful for large industrial motor systems.

Higher motor voltage can allow large motor power to be transmitted at a lower current than would otherwise be required at a lower voltage.

This can be advantageous in large electrical installations.

21.4 Adjustable Speed

The drive provides a means of controlling motor speed rather than simply switching the motor between stopped and full-speed operation.

This is valuable for:

• Pumps
• Fans
• Conveyors
• Blowers
• Compressors
• Mixers
• Process machines

21.5 Controlled Starting

A large motor can draw substantial current during direct starting.

A drive can control the acceleration process and bring the motor up to speed gradually.

This can improve the mechanical behavior of the system and make the startup process more manageable.

21.6 Industrial Communication

Embedded EtherNet/IP provides a practical way of integrating the drive into a larger automation architecture.

Typical information can include:

22. Energy-Saving Potential

Variable-speed drives can provide energy-saving opportunities when the application does not always require full motor speed.

This is particularly relevant to variable-torque applications such as pumps and fans.

The actual savings depend on the individual installation.

Important factors include:

• Motor efficiency
• Load profile
• Operating hours
• Required speed range
• Pump or fan characteristics
• Mechanical efficiency
• Control strategy
• Process requirements

23. Air-Cooled Design

The drive uses a forced-air cooling arrangement.

At this power level, thermal management is a major engineering consideration.

The installation should provide appropriate airflow and sufficient ventilation.

Important considerations include:

• Air inlet clearance
• Air outlet clearance
• Cabinet ventilation
• Cooling-fan operation
• Ambient temperature
• Dust control
• Maintenance access

24. Enclosure and Installation Environment

The configuration is associated with a Type 1 / IP20 style installation.

It is intended to be installed within an appropriate industrial electrical environment rather than exposed directly to outdoor weather.

The installation environment should be evaluated for:

• Dust
• Moisture
• Temperature
• Humidity
• Condensation
• Corrosive substances
• Air contamination
• Ventilation

25. Automation Integration

A typical system architecture can be represented as:

Operator Interface

↓

Industrial Controller

↓

Industrial Ethernet Network

↓

20G11LF1K0JN0NNNNN

↓

Large AC Motor

↓

Pump / Fan / Conveyor / Process Machine

This arrangement allows the drive to become part of the overall production-control system.

The controller can issue commands while receiving drive status and diagnostic information.

26. Process Control Capabilities

27. Maintenance Advantages

The drive can provide operational information useful to maintenance personnel.

Typical information that can be monitored includes:

• Current
• Frequency
• Speed
• Status
• Warnings
• Faults
• Communication status
• Operating conditions

This can make troubleshooting more systematic.

A maintenance team can use operating information to identify recurring problems and investigate abnormal conditions before they become larger production issues.

28. Installation Considerations

Before installing this high-power drive, the following areas should be checked carefully.

29. Mechanical Dimension Summary

30. Five Same-Series or Closely Related Models

The following models can be considered when comparing different current capacities within the high-power PowerFlex 755 range.

31. Related Model — 20G11LF795AN0NNNNN

This model belongs to the same high-power series but has a lower current capacity.

It may be considered where the motor current requirement is below the 1040 A class.

32. Related Model — 20G11LF960AN0NNNNN

The 960 A version is particularly close to the main 1040 A model.

It can be considered where the motor’s actual current requirement falls below the capacity of the 1040 A version.

33. Related Model — 20G11LF1K4AN0NNNNN

This configuration provides substantially more current capability than the main 1040 A model.

It may be considered for very large motors where the current requirement is higher.

34. Related Model — 20G11LF1K5AN0NNNNN

This is another very-high-current configuration in the same general product family.

It can be considered where the motor and load require a current rating above the 1040 A level.

35. Related Model — 20G11LF1K0AN0NNNNN

The 20G11LF1K0AN0NNNNN is closely related to the requested 20G11LF1K0JN0NNNNN.

The two catalog numbers share the same principal high-power rating characteristics, while the catalog-number suffix indicates a different configuration.

36. Five Popular Models from the Same Brand

For users who want alternatives at substantially different power levels, the following models provide a broader comparison across the product range.

37. 25B-D010N104

The 25B-D010N104 belongs to the compact PowerFlex 525 family.

It is intended for much smaller motors and machinery than the 20G11LF1K0JN0NNNNN.

38. 25B-D017N104

The 25B-D017N104 provides a higher current level within the PowerFlex 525 family.

It is suitable for general-purpose industrial machinery where the motor is much smaller than the very-high-power motor controlled by the 20G11LF1K0JN0NNNNN.

39. 25B-D027N114

The 25B-D027N114 is a larger PowerFlex 525 configuration.

It can be considered for medium-size industrial machinery.

40. 20F11ND077AA0NNNNN

The 20F11ND077AA0NNNNN belongs to the PowerFlex 753 family.

It occupies a much lower power range than the requested 20G11LF1K0JN0NNNNN but can be useful for medium and large industrial machines.

41. Comparison of Same-Series Models

42. Comparison by Application

43. Selection Advantages of the 20G11LF1K0JN0NNNNN

The main reasons to select this model can be summarized as follows.

High Motor Capacity

The 1040 A rating makes it appropriate for very large motors.

High Voltage Class

The 690 VAC class is well suited to large industrial motor systems.

High Power

The drive can reach approximately 1,100 kW Light Duty.

Flexible Duty Ratings

The same general drive platform can be applied to Light-Duty, Normal-Duty and Heavy-Duty applications according to the appropriate rating.

Variable-Speed Control

Motor speed can be adjusted according to process requirements.

Controlled Acceleration

Large mechanical systems can be started more progressively.

Automation Integration

Embedded EtherNet/IP supports integration with industrial control architectures.

High-Power Industrial Construction

The Frame 10 / MCC-style arrangement is intended for large industrial installations.

44. Recommended Application Areas

45. Overall Technical Assessment

The 20G11LF1K0JN0NNNNN is a very-high-power industrial AC drive designed for applications where motor capacity, current capability and process control are all significant considerations.

Its 690 VAC / 1040 A electrical rating gives it the capacity required by very large three-phase motors.

The approximately 1,100 kW Light-Duty, 1,000 kW Normal-Duty and 900 kW Heavy-Duty ratings provide a useful way of matching the drive to different load characteristics.

The air-cooled construction is appropriate for large industrial installations where forced ventilation is available.

The 800 mm depth and MCC-style construction should be considered during cabinet planning and equipment layout.

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

The product is especially valuable when the application requires more than simple motor starting.

It can provide adjustable speed, controlled acceleration, process coordination, operating information and centralized control.

46. Final Summary

The 20G11LF1K0JN0NNNNN is therefore best understood as a very-high-power PowerFlex 755 variable frequency drive for large 690 VAC industrial motors.

Its combination of 1040 A current capacity, approximately 1.1 MW Light-Duty capability, 1.0 MW Normal-Duty capability, 0.9 MW Heavy-Duty capability, forced-air cooling, 800 mm deep MCC-style construction and industrial network integration makes it particularly suitable for large-scale continuous-process and heavy-duty machinery.

For exact engineering work, the motor nameplate current, required overload profile, supply conditions, environmental conditions and final mechanical configuration should be checked together before selecting the drive. In particular, the exact width, height and weight in kg should be taken from the final configured assembly rather than estimated from the catalog number alone.