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Allen-Bradley 20G11LF590AN2NNNNN

PowerFlex 755 Air-Cooled AC Drive – Detailed Product Information, Technical Specifications, Applications, Advantages and Related Models

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1. Product Overview

The 20G11LF590AN2NNNNN is a high-power air-cooled AC drive belonging to the PowerFlex 755 series.

It is designed for large three-phase motor applications where precise speed regulation, controlled acceleration, process control and reliable industrial operation are required.

The drive is intended for large industrial motor systems and is particularly suitable for applications involving pumps, fans, blowers, conveyors, compressors, mixers, crushers, material-handling equipment and other high-power machinery.

The model is rated in the 690 VAC class and has a 590 A output-current rating.

Its approximate power ratings are:

• 630 kW Light Duty
• 560 kW Normal Duty
• 450 kW Heavy Duty

The product uses an air-cooled construction and an 800 mm deep MCC-style installation configuration.

The catalog number also indicates a specific factory configuration. Therefore, two products with similar catalog numbers can have different option combinations, even though their basic electrical rating is similar.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	High-Power AC Variable Frequency Drive
Catalog Number	20G11LF590AN2NNNNN
Cooling Type	Air Cooled
Voltage Class	690 VAC
Input Phase	Three Phase
Output Current	590 A
Light-Duty Rating	630 kW
Normal-Duty Rating	560 kW
Heavy-Duty Rating	450 kW
Installation Style	800 mm Deep MCC Style
Frame Class	Frame 9 class
Input Configuration	AC Input with Precharge
DC Terminals	Available in this configuration
EMC Filtering	Yes
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Enclosure Class	Type 1 / IP20 class
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent

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3. Product Identification

The complete catalog number is:

20G11LF590AN2NNNNN

The catalog number identifies a particular PowerFlex 755 high-power drive configuration.

The most important electrical section is the LF590 designation, which corresponds to the high-current 590 A class.

The model belongs to the large-frame PowerFlex 755 range rather than the compact variable frequency drive category.

This makes it more appropriate for large motors and industrial machinery where a smaller drive would not provide sufficient output current.

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4. Main Technical Parameters

Parameter	Specification
Model	20G11LF590AN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Cooling	Air Cooled
Input Voltage	690 VAC
Input	Three Phase
Output Current	590 A
Light-Duty Power	630 kW
Normal-Duty Power	560 kW
Heavy-Duty Power	450 kW
Input Type	AC Input with Precharge
EMC Filter	Yes
Dynamic Braking	None
DC Terminals	Yes
Communication	Embedded EtherNet/IP
Installation Style	800 mm Deep MCC Style
Enclosure	Type 1 / IP20 class
Frame	Frame 9 class
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Typical Motor Application	Large Industrial AC Motors
Typical Load	Pumps, Fans, Conveyors, Compressors, Process Machinery

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5. Electrical Rating

The most important electrical characteristic of the 20G11LF590AN2NNNNN is its 590 A output-current class.

This places the drive in the high-power industrial category.

The drive is intended for large three-phase AC motors where variable-speed control is required.

The approximate duty ratings are shown below.

Duty Classification	Power Rating
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW

The correct duty rating should be selected according to the actual mechanical load.

A pump or fan may operate under relatively smooth conditions, while a crusher, conveyor or mixer may require greater overload capability.

For that reason, motor current and application duty should always be considered together.

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6. 690 VAC Voltage Class

The drive is designed for 690 VAC three-phase industrial power systems.

The 690 VAC class is commonly associated with large industrial motor installations.

Higher motor voltage can help reduce current compared with a lower-voltage motor of similar power.

This can have an impact on:

• Motor feeder design
• Cable selection
• Switchgear sizing
• Transformer selection
• Motor protection
• Electrical distribution
• Motor control center design

The complete electrical system still needs to be designed according to the motor, transformer, protection system, grounding method and site requirements.

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7. 590 A Output Current

The 590 A output rating makes this drive suitable for large motor applications.

Motor current is affected by several factors, including:

• Motor power
• Motor voltage
• Motor efficiency
• Power factor
• Load torque
• Speed
• Acceleration requirements
• Overload requirements

Therefore, the drive should be selected based on the motor’s actual nameplate current rather than only comparing the motor’s nominal kW rating.

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8. Duty Ratings Explained

Light Duty – 630 kW

The approximately 630 kW Light-Duty rating is suitable for relatively smooth loads.

Typical applications include:

• Large centrifugal pumps
• Large fans
• Cooling-water pumps
• Ventilation systems
• Industrial blowers
• Circulation systems

These applications generally do not require severe repeated overload conditions.

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Normal Duty – 560 kW

The approximately 560 kW Normal-Duty rating provides a balance between power capability and moderate overload requirements.

Typical applications include:

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

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Heavy Duty – 450 kW

The approximately 450 kW Heavy-Duty rating is more appropriate for applications where higher torque or overload capability is required.

Examples include:

• Crushers
• Heavy conveyors
• Mixers
• Mining machinery
• Bulk-material equipment
• High-inertia machines
• Heavy process machinery

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9. Cooling System

The 20G11LF590AN2NNNNN uses air cooling.

At this power level, heat management is a major part of the installation design.

The drive’s power electronics generate heat during normal operation.

The cooling system removes this heat from the drive assembly.

Important installation factors include:

Cooling Factor	Importance
Airflow	Very High
Ventilation	Very High
Ambient Temperature	Very High
Air Intake	High
Exhaust Path	High
Fan Condition	High
Dust Accumulation	High
Cabinet Arrangement	High
Maintenance Access	High

Restricted airflow can increase internal temperature and may negatively affect equipment reliability.

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10. Input Configuration

The catalog configuration uses AC input with precharge.

The basic electrical power path can be represented as:

690 VAC Three-Phase Supply

↓

AC Input

↓

Precharge

↓

Rectifier

↓

DC Link

↓

Inverter

↓

Variable-Frequency AC Output

↓

Large AC Motor

The drive converts the fixed-frequency input supply into a controlled output suitable for variable-speed motor operation.

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11. Precharge Function

Precharge is particularly important in high-power drives.

Large drives contain DC-link capacitors that require controlled charging during startup.

A precharge circuit helps control the initial charging process and limits excessive inrush current.

This becomes increasingly important as drive power increases.

The precharge arrangement contributes to a more controlled startup of the drive’s power section.

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12. EMC Filtering

The model includes an EMC filter configuration.

A variable frequency drive uses high-frequency switching devices to produce the motor output waveform.

The switching process can generate high-frequency electrical components.

An EMC filter helps control conducted electrical noise and supports electromagnetic compatibility when the entire installation is properly designed.

Other factors remain important, including:

• Grounding
• Cable shielding
• Motor cable routing
• Control cable separation
• Cabinet bonding
• Cable length
• Proper termination

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13. Dynamic Braking

The specified configuration has:

Dynamic Braking: None

This is an important consideration for high-inertia applications.

When a large motor decelerates, energy can return toward the drive’s DC bus.

The correct braking method depends on the application.

Applications requiring rapid deceleration should therefore be evaluated carefully.

Examples include:

• Large conveyors
• Centrifuges
• High-inertia fans
• Large rotating equipment
• Rapid-cycle machinery

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14. DC Terminals

The configuration includes DC terminals.

DC terminals can provide additional flexibility for certain system architectures.

Potential applications include:

• Common DC bus arrangements
• Multi-drive systems
• Shared DC-link systems
• Certain regenerative architectures

The actual connection method must be determined by the complete electrical design.

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15. Communication Capability

The PowerFlex 755 platform supports embedded EtherNet/IP communication.

This allows the drive to be integrated into an industrial automation network.

Typical information exchanged between the drive and control system can include:

Information	Purpose
Start Command	Motor starting
Stop Command	Motor stopping
Speed Reference	Speed control
Actual Speed	Monitoring
Output Current	Load monitoring
Output Frequency	Drive monitoring
Drive Status	Automation control
Warning Status	Preventive maintenance
Fault Status	Troubleshooting
Fault Reset	Recovery
Diagnostic Data	Maintenance

This communication capability is particularly useful in large industrial plants with centralized automation.

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16. Physical Dimensions

The product uses an 800 mm deep MCC-style configuration.

The 800 mm depth is an important mechanical parameter for cabinet and electrical-room planning.

The complete dimensions can depend on the final configuration.

Mechanical Parameter	Specification
Frame	Frame 9 class
Installation Style	MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Enclosure	Type 1 / IP20 class
Cooling	Air Cooled
Mounting	Industrial MCC Installation
Cable Entry	Configuration-dependent
Maintenance Clearance	Application-dependent
Weight (kg)	Configuration-dependent

For a final mechanical drawing, cabinet design or transportation plan, the exact configured assembly should be used.

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17. Weight

The Weight (kg) of a complete 20G11LF590AN2NNNNN assembly is configuration-dependent.

This is especially important for a high-power packaged drive because the final weight can be affected by the physical configuration and installed equipment.

For planning purposes, the following should be considered:

Weight Category	Specification
Drive Weight	Configuration-dependent
Complete Assembly Weight	Configuration-dependent
Weight (kg)	Confirm from final configured equipment
Shipping Weight	May be higher than equipment weight
Cabinet Weight	Depends on final assembly
Lifting Requirement	Based on actual final weight
Floor Loading	Must be checked
Transportation	Heavy industrial equipment handling

It is not recommended to use an approximate generic weight for crane selection or floor-loading calculations.

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18. Product Introduction

The 20G11LF590AN2NNNNN is intended to provide variable-speed control for large industrial AC motors.

A conventional fixed-speed motor normally operates at a relatively fixed operating point.

A variable frequency drive changes this approach by controlling the frequency and voltage supplied to the motor.

This allows motor speed to be adjusted according to the process.

For example:

A large pump may operate at reduced speed when the required flow is low.

A large fan may reduce speed when ventilation demand decreases.

A conveyor can accelerate smoothly instead of starting abruptly.

A mixer can operate at different speeds during different process stages.

A compressor can adjust its operating speed according to production demand.

This flexibility is one of the primary reasons high-power AC drives are used in modern industrial plants.

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19. Main Product Advantages

High Current Capacity

The 590 A output-current rating makes the drive suitable for large industrial motors.

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High Power Capability

The approximate 630 kW Light-Duty, 560 kW Normal-Duty and 450 kW Heavy-Duty ratings provide a broad operating range.

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690 VAC Industrial Operation

The 690 VAC voltage class makes the drive suitable for large industrial motor systems.

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Adjustable Speed

Motor speed can be adjusted to match the process requirement.

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Controlled Acceleration

The drive can provide a controlled acceleration profile.

This can reduce sudden mechanical loading on:

• Shafts
• Couplings
• Gearboxes
• Belts
• Bearings
• Conveyor structures

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Process Flexibility

The drive can be used to regulate process variables such as:

• Flow
• Pressure
• Airflow
• Conveyor speed
• Production rate
• Mixing speed

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Industrial Communication

Embedded EtherNet/IP provides an effective method of integrating the drive into industrial automation systems.

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High-Power Industrial Construction

The PowerFlex 755 architecture is designed for demanding industrial applications involving large motors and high electrical power.

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20. Pump Applications

Large pumps are an important application area for this drive.

A pump does not always need to operate at maximum speed.

The drive can adjust the motor speed according to the required process conditions.

Typical applications include:

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

Potential advantages include:

• Improved flow control
• Improved pressure control
• Smooth startup
• Reduced mechanical stress
• Reduced throttling in suitable systems
• Potential energy savings

Actual energy savings depend on the pump system and operating profile.

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21. Fan and Blower Applications

Large fans and blowers can consume significant amounts of energy.

A variable-speed drive can reduce or increase motor speed according to actual airflow demand.

Potential applications include:

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

The 590 A rating makes this model suitable for large fan systems.

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22. Conveyor Applications

Large conveyors often have substantial mechanical inertia.

Direct starting can create a high mechanical load.

A variable frequency drive can provide controlled acceleration.

Potential advantages include:

• Reduced starting shock
• Adjustable conveyor speed
• Improved material handling
• Better process synchronization
• Controlled startup
• Controlled stopping

Typical applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk-material conveyors
• Ore-handling systems
• Industrial production conveyors

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23. Crusher Applications

Crushers can experience rapidly changing mechanical loads.

The Heavy-Duty capability of approximately 450 kW makes this drive a potential solution for appropriately sized crusher motors.

The motor’s actual full-load current and overload requirements should be checked carefully.

A crusher application may require a different drive size than a pump application with the same nominal motor kW.

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24. Compressor Applications

Large compressors can require substantial motor power.

Variable-speed operation can allow the compressor to respond to changing process demand.

Potential applications include:

• Industrial air systems
• Process compressors
• Production plants
• Gas-processing systems
• Large pneumatic systems

Compressor-specific torque and operating-speed requirements should be considered during selection.

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25. Mixer Applications

Large mixers can require high starting torque.

The required torque can increase significantly when the vessel is loaded.

A variable frequency drive can provide controlled acceleration and adjustable operating speed.

Potential applications include:

• Chemical processing
• Cement production
• Mineral processing
• Bulk materials
• Food processing
• General manufacturing
• Industrial process systems

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26. Mining Applications

The 690 VAC, 590 A configuration is well suited for consideration in large mining systems.

Potential applications include:

Mining Equipment	Typical Drive Function
Conveyor	Variable-Speed Control
Crusher	Heavy-Duty Motor Control
Dewatering Pump	Flow Control
Ventilation Fan	Airflow Control
Material Handling	Controlled Acceleration
Processing Equipment	Speed Control
Bulk Handling	Process Coordination

Mining installations require particular attention to environmental conditions, ventilation, dust and mechanical loading.

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27. Cement and Aggregate Applications

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

Typical equipment includes:

• Crushers
• Conveyors
• Large fans
• Blowers
• Pumps
• Mixers
• Processing equipment

The 20G11LF590AN2NNNNN can be considered where the motor current and duty requirements fall within its ratings.

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28. Water and Wastewater Applications

Large water-treatment facilities often contain high-power pumping systems.

Potential applications include:

• Raw-water pumps
• Transfer pumps
• Process pumps
• Cooling-water pumps
• Wastewater pumps
• Large ventilation fans
• Sludge-processing equipment

Variable-speed control can help match pump operation to actual process requirements.

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29. Energy Efficiency Advantages

One of the major benefits of variable-speed operation is the ability to match motor speed with actual process demand.

This is particularly useful for centrifugal pumps and fans.

In suitable applications, a reduction in motor speed can produce a significant reduction in mechanical power demand.

Potential benefits include:

• Lower electrical consumption
• Reduced throttling
• Improved process control
• Reduced mechanical stress
• Reduced unnecessary full-speed operation

The actual energy savings must be calculated using the site’s real operating profile.

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30. Motor Selection

The motor must be properly matched to the drive.

Motor Parameter	Importance
Rated Voltage	Very High
Full-Load Current	Critical
Motor Power	Very High
Rated Frequency	High
Rated Speed	High
Power Factor	High
Efficiency	High
Starting Torque	Very High
Overload Requirement	Critical
Speed Range	Very High
Motor Insulation	High
Motor Cable Length	High
Load Type	Critical

For a 590 A drive, motor full-load current is one of the most important selection parameters.

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31. Installation Requirements

Installation Parameter	Specification / Consideration
Input Voltage	690 VAC
Input Phase	Three Phase
Motor Voltage	Verify Motor Nameplate
Motor Current	Verify Motor Nameplate
Motor Power	Compare With Duty Rating
Duty	Select According to Load
Cooling	Adequate Airflow Required
Ambient Temperature	Verify Site Conditions
Dust	Control Contamination
Grounding	Proper Grounding Required
Motor Cable	Correct Size Required
Cable Routing	Appropriate Separation
Cabinet Depth	800 mm
Cabinet Width	Verify Final Configuration
Cabinet Height	Verify Final Configuration
Weight (kg)	Verify Final Assembly
Maintenance Clearance	Provide Adequate Access
Communication	Verify Network Requirements

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32. Maintenance

Because the product is a high-power air-cooled drive, regular maintenance is important.

Typical inspection items include:

• Cooling fans
• Air passages
• Power terminals
• Electrical connections
• Cabinet ventilation
• Grounding connections
• Motor cables
• Environmental contamination
• Drive temperature
• Fault history
• Communication status
• Cooling performance

Dust accumulation should be controlled because blocked airflow can increase operating temperature.

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33. Five Same-Series or Closely Related Models

The following five models are useful alternatives for comparison within the PowerFlex 755 high-power range.

Model	Series	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	Depth	Weight (kg)
20G11LF590AN0NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm	Configuration-dependent
20G11LF590JN0NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm	Configuration-dependent
20G11LF590JN2NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm	Configuration-dependent
20G11LF650AN0NNNNN	PowerFlex 755	690 VAC	650 A	710 kW	630 kW	500 kW	800 mm class	Configuration-dependent
20G11LF710AN0NNNNN	PowerFlex 755	690 VAC	710 A	790 kW class	710 kW	590 kW	800 mm class	Configuration-dependent

The first three are especially close to the requested 590 A configuration.

The 650 A and 710 A models provide higher current capacity and are useful when the motor load is approaching the upper end of the 590 A range.

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34. Related Model: 20G11LF590AN0NNNNN

The 20G11LF590AN0NNNNN is an especially close comparison because it retains the same 590 A electrical rating.

Parameter	20G11LF590AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Output Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Input	AC Input with Precharge
EMC Filter	Yes
Dynamic Braking	None
Installation	800 mm MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP

This model is useful when comparing different catalog configurations with the same basic electrical capacity.

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35. Related Model: 20G11LF590JN0NNNNN

The 20G11LF590JN0NNNNN is another close 590 A configuration.

Parameter	20G11LF590JN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Output Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Input	AC Input with Precharge
EMC Filter	Yes
Dynamic Braking	None
Installation	800 mm MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP

It is particularly relevant when looking for a current-generation configuration corresponding to the same basic drive rating.

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36. Related Model: 20G11LF590JN2NNNNN

The 20G11LF590JN2NNNNN is another 590 A PowerFlex 755 configuration.

Parameter	20G11LF590JN2NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Output Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Input	AC Input with Precharge
EMC Filter	Yes
Dynamic Braking	None
Installation	800 mm MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP

This is a strong technical comparison when the required motor current remains around 590 A.

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37. Related Higher-Capacity Model: 20G11LF650AN0NNNNN

The 20G11LF650AN0NNNNN provides additional current capacity.

Parameter	20G11LF650AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Output Current	650 A
Light Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Cooling	Air Cooled
Input	AC Input with Precharge
EMC Filter	Yes
Dynamic Braking	None
Installation	800 mm MCC Style
Depth	800 mm class
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP

This is a logical step upward when the 590 A rating is insufficient.

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38. Related Higher-Capacity Model: 20G11LF710AN0NNNNN

The 20G11LF710AN0NNNNN provides a further increase in current capacity.

Parameter	20G11LF710AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Output Current	710 A
Light Duty	Approximately 790 kW class
Normal Duty	710 kW
Heavy Duty	590 kW
Cooling	Air Cooled
Input	AC Input with Precharge
Installation	800 mm class
Depth	800 mm class
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Typical Application	Very Large Industrial Motors

This model can be considered when the application exceeds the practical capacity of the 590 A and 650 A configurations.

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39. Five Representative Popular Models from the Same Brand

The following models cover different power ranges and are useful when selecting a drive according to motor size.

They are not direct substitutes for the 590 A unit.

Model	Series	Voltage Class	Current Class	Typical Application	Dimensions	Weight (kg)
25B-D010N104	PowerFlex 525	480 VAC class	10 A class	Small Pumps / Fans	Compact, frame-dependent	Configuration-dependent
25B-D017N104	PowerFlex 525	480 VAC class	17 A class	Small Conveyors / Fans	Compact, frame-dependent	Configuration-dependent
25B-D027N114	PowerFlex 525	480 VAC class	27 A class	Pumps / Machinery	Compact, frame-dependent	Configuration-dependent
20F11ND077AA0NNNNN	PowerFlex 753	480 VAC class	77 A class	Pumps / Fans / Conveyors	Frame-dependent	Configuration-dependent
20G11LF650AN0NNNNN	PowerFlex 755	690 VAC	650 A	Large Industrial Motors	800 mm depth class	Configuration-dependent

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40. 25B-D010N104

The 25B-D010N104 is a compact drive intended for significantly smaller motors than the 590 A PowerFlex 755.

Parameter	25B-D010N104
Series	PowerFlex 525
Voltage Class	480 VAC class
Current Class	10 A class
Product Type	Compact AC Drive
Typical Applications	Pumps
Typical Applications	Fans
Typical Applications	Small Conveyors
Installation	Compact
Dimensions	Frame-dependent
Weight (kg)	Configuration-dependent
Cooling	Configuration-dependent

This type of model is more appropriate when the motor is relatively small and a compact installation is preferred.

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41. 25B-D017N104

The 25B-D017N104 provides a higher current range within the compact drive family.

Parameter	25B-D017N104
Series	PowerFlex 525
Voltage Class	480 VAC class
Current Class	17 A class
Product Type	Compact AC Drive
Typical Applications	Pumps
Typical Applications	Fans
Typical Applications	Conveyors
Typical Applications	Small Process Machines
Dimensions	Frame-dependent
Weight (kg)	Configuration-dependent
Cooling	Configuration-dependent

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42. 25B-D027N114

The 25B-D027N114 is another compact model for applications requiring more current.

Parameter	25B-D027N114
Series	PowerFlex 525
Voltage Class	480 VAC class
Current Class	27 A class
Product Type	Compact Variable Frequency Drive
Typical Applications	Pumps
Typical Applications	Fans
Typical Applications	Conveyors
Typical Applications	Process Machinery
Dimensions	Frame-dependent
Weight (kg)	Configuration-dependent
Cooling	Configuration-dependent

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43. 20F11ND077AA0NNNNN

The 20F11ND077AA0NNNNN belongs to the PowerFlex 753 series and occupies a substantially smaller power class than the 590 A PowerFlex 755.

Parameter	20F11ND077AA0NNNNN
Series	PowerFlex 753
Voltage Class	480 VAC class
Current Class	77 A class
Product Type	Industrial AC Drive
Typical Applications	Pumps
Typical Applications	Fans
Typical Applications	Conveyors
Typical Applications	Process Equipment
Dimensions	Frame-dependent
Weight (kg)	Frame-dependent
Cooling	Air Cooled / Configuration-dependent
Installation	Industrial Drive Installation

This is a useful choice when the motor is much smaller than the 590 A range.

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44. 20G11LF650AN0NNNNN

The 20G11LF650AN0NNNNN is the closest higher-capacity comparison in this selection.

Parameter	20G11LF650AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Output Current	650 A
Light Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Cooling	Air Cooled
Input	AC Input with Precharge
EMC Filter	Yes
Dynamic Braking	None
Installation	800 mm MCC Style
Depth	800 mm class
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Typical Applications	Large Pumps
Typical Applications	Large Fans
Typical Applications	Conveyors
Typical Applications	Process Machinery

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45. Main Model Comparison

Parameter	20G11LF590AN2NNNNN	20G11LF650AN0NNNNN	20G11LF710AN0NNNNN
Series	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage	690 VAC	690 VAC	690 VAC
Current	590 A	650 A	710 A
Light Duty	630 kW	710 kW	~790 kW
Normal Duty	560 kW	630 kW	710 kW
Heavy Duty	450 kW	500 kW	590 kW
Cooling	Air Cooled	Air Cooled	Air Cooled
Input	AC with Precharge	AC with Precharge	AC with Precharge
EMC Filter	Yes	Yes	Yes
Dynamic Braking	None	None	None
Installation	800 mm MCC Style	800 mm MCC Style	800 mm class
Depth	800 mm	800 mm class	800 mm class
Width	Configuration-dependent	Configuration-dependent	Configuration-dependent
Height	Configuration-dependent	Configuration-dependent	Configuration-dependent
Weight (kg)	Configuration-dependent	Configuration-dependent	Configuration-dependent

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46. Same-Series Model Comparison

Model	Current	Light Duty	Normal Duty	Heavy Duty	Voltage	Cooling	Depth	Weight (kg)
20G11LF590AN0NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	Air	800 mm	Configuration-dependent
20G11LF590AN2NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	Air	800 mm	Configuration-dependent
20G11LF590JN0NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	Air	800 mm	Configuration-dependent
20G11LF590JN2NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	Air	800 mm	Configuration-dependent
20G11LF650AN0NNNNN	650 A	710 kW	630 kW	500 kW	690 VAC	Air	800 mm class	Configuration-dependent

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47. Application Selection Table

Application	Recommended Duty	Suitability
Large Centrifugal Pump	Light / Normal	Excellent
Large Fan	Light / Normal	Excellent
Industrial Blower	Light / Normal	Excellent
Water Pumping Station	Normal	Excellent
Large Conveyor	Normal / Heavy	Good
Crusher	Heavy	Good when within rating
Large Mixer	Heavy	Good when within rating
Mining Fan	Light / Normal	Excellent
Mining Conveyor	Normal / Heavy	Good
Cement Equipment	Normal / Heavy	Good
Process Compressor	Application-dependent	Good
Material Handling	Normal / Heavy	Good
Industrial Process Machine	Normal	Excellent

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48. Product Advantages in Industrial Automation

The 20G11LF590AN2NNNNN is more than a simple motor-speed controller.

It can function as an important part of a larger industrial automation system.

The drive can provide operating information to the control system.

This can include:

• Motor speed
• Output current
• Output frequency
• Drive status
• Warning conditions
• Fault conditions
• Operating commands
• Speed references
• Diagnostic information

This makes it possible to coordinate the motor with other production equipment.

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49. Advantages for Large Pump Systems

For large pump systems, the drive can help the motor operate closer to the actual process requirement.

Instead of maintaining full speed and using mechanical throttling, the system can potentially regulate pump speed directly.

This may provide:

• Better flow control
• Better pressure control
• Smooth startup
• Lower mechanical shock
• Improved process response
• Potential energy savings

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50. Advantages for Large Fan Systems

Large ventilation systems often do not require maximum airflow at all times.

The drive can adjust fan speed according to demand.

This can provide:

• Adjustable airflow
• Improved ventilation control
• Reduced unnecessary full-speed operation
• Smooth startup
• Lower mechanical stress
• Potential energy savings

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51. Advantages for Conveyor Systems

Conveyors can experience considerable mechanical stress during startup.

Controlled acceleration can reduce sudden torque transfer through the drive train.

Potential benefits include:

• Smoother startup
• Reduced belt stress
• Reduced gearbox shock
• Adjustable operating speed
• Improved process synchronization
• Better material handling

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52. Advantages for Mining and Heavy Industry

Mining and heavy industrial equipment frequently uses very large motors.

The drive’s 590 A capacity makes it suitable for many large motor systems.

Possible applications include:

• Ore conveyors
• Dewatering pumps
• Ventilation fans
• Crushers
• Processing equipment
• Bulk-material handling
• Large rotating machinery

The actual selection should always be based on the motor current and load duty.

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53. Mechanical Installation

The 800 mm depth is a significant consideration.

A complete installation should allow enough room for:

• Incoming power cables
• Motor cables
• Cable bending radius
• Control wiring
• Airflow
• Maintenance
• Component replacement
• Door operation
• Inspection
• Lifting and transportation

The final width and height should be determined from the exact configured assembly.

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54. Environmental Installation

The drive should be installed in an appropriate industrial environment.

Important considerations include:

Environmental Factor	Importance
Temperature	Very High
Humidity	High
Dust	High
Conductive Contamination	High
Corrosive Atmosphere	High
Vibration	High
Airflow	Very High
Altitude	Application-dependent
Grounding	Very High
Electrical Noise	High

Proper environmental control contributes significantly to long-term equipment reliability.

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55. Maintenance Recommendations

A high-power drive should be included in a planned maintenance program.

Recommended inspection areas include:

Cooling System

Check cooling fans, ventilation passages and airflow.

Electrical Connections

Inspect power connections and terminals according to maintenance procedures.

Cabinet

Check for dust, moisture and contamination.

Motor Cables

Inspect cables, terminations and grounding.

Drive Status

Review warnings, faults and operating history.

Communication

Check the industrial communication connection and system status.

Temperature

Monitor abnormal temperature conditions.

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56. Product Strengths at a Glance

Advantage	Description
High Current	590 A
High Power	Up to approximately 630 kW LD
High Voltage	690 VAC
Variable Speed	Yes
Controlled Acceleration	Yes
Process Control	Yes
Industrial Communication	Embedded EtherNet/IP
Air Cooling	Yes
EMC Filtering	Yes
DC Terminals	Yes
Large Motor Capability	Excellent
Pump Applications	Excellent
Fan Applications	Excellent
Conveyor Applications	Excellent
Heavy Industry	Excellent
Mining Applications	Suitable
Industrial Automation	Suitable

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57. Recommended Selection Priority

When selecting this drive for a project, the following order is recommended.

First: Confirm Motor Voltage

The motor electrical voltage must be compatible with the drive system.

Second: Confirm Motor Current

The motor full-load current is one of the most important parameters.

Third: Confirm Duty

Determine whether the application is Light Duty, Normal Duty or Heavy Duty.

Fourth: Confirm Load Type

Pump, fan, conveyor, crusher and mixer loads can have very different requirements.

Fifth: Confirm Acceleration

High-inertia machinery may require longer acceleration times.

Sixth: Confirm Deceleration

Applications with rapid stopping may require additional braking consideration.

Seventh: Confirm Environment

Temperature, dust, humidity and airflow must be considered.

Eighth: Confirm Physical Installation

The 800 mm depth and final cabinet dimensions should be included in the mechanical design.

Ninth: Confirm Weight

The exact configured Weight (kg) should be used for transportation and installation planning.

Tenth: Confirm Communication

The automation system should be checked for the required industrial communication architecture.

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58. Detailed Final Specification Table

Parameter	20G11LF590AN2NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	High-Power Air-Cooled AC Drive
Model	20G11LF590AN2NNNNN
Voltage Class	690 VAC
Input	Three Phase AC
Output Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Frame	Frame 9 class
Input Type	AC Input with Precharge
EMC Filter	Yes
Dynamic Braking	None
DC Terminals	Yes
Communication	Embedded EtherNet/IP
Enclosure	Type 1 / IP20 class
Installation Style	800 mm Deep MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Typical Motor Type	Three-Phase AC Motor
Typical Application	Pumps
Typical Application	Fans
Typical Application	Blowers
Typical Application	Conveyors
Typical Application	Crushers
Typical Application	Compressors
Typical Application	Mixers
Typical Application	Mining Equipment
Typical Application	Process Machinery

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59. Overall Product Assessment

The 20G11LF590AN2NNNNN is a high-capacity industrial variable frequency drive intended for large AC motor systems.

Its combination of 690 VAC operation, 590 A output current, high power ratings and air-cooled construction makes it appropriate for large industrial installations.

The approximate 630 kW Light-Duty, 560 kW Normal-Duty and 450 kW Heavy-Duty ratings provide flexibility for different load conditions.

The model is particularly attractive for applications where a large motor needs controlled speed rather than simple fixed-speed operation.

For pumps and fans, variable-speed operation can help match motor output to actual process demand.

For conveyors and material-handling machinery, controlled acceleration can help reduce mechanical shock.

For mining, cement, aggregate and process applications, the high-current design provides the capacity required by large motors.

The embedded EtherNet/IP capability also makes the drive suitable for integration into industrial automation systems.

The 800 mm depth is an important mechanical parameter and should be considered during cabinet and electrical-room planning.

The exact width, height and Weight (kg) should be confirmed against the final configured assembly because these physical characteristics can change with the selected configuration.

From a selection perspective, the closest alternatives are the other 590 A PowerFlex 755 configurations, while the 650 A and 710 A versions are appropriate when additional current and power capacity is required.

For much smaller motors, the PowerFlex 525 and PowerFlex 753 families provide more compact alternatives.

Overall, the 20G11LF590AN2NNNNN can be regarded as a 690 VAC, 590 A, high-power PowerFlex 755 AC drive designed for large industrial motor control, variable-speed operation, process regulation and automation integration.