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Allen-Bradley 20G11LF590AN0NNNNN

PowerFlex 755 Air-Cooled AC Drive — Product Overview, Technical Specifications, Applications, Advantages and Recommended Models

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1. Product Overview

The 20G11LF590AN0NNNNN is a high-power industrial variable frequency AC drive from the PowerFlex 755 family.

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

This model is a 690 VAC-class PowerFlex 755 air-cooled AC drive with a 590 A output-current rating. Its power capability is approximately 630 kW for Light Duty, 560 kW for Normal Duty and 450 kW for Heavy Duty.

The drive uses an 800 mm deep MCC-style configuration, with AC input and precharge, DC terminals, EMC filtering and an industrial enclosure arrangement.

The model is particularly suitable for large pumps, fans, blowers, conveyors, compressors, mixers, process equipment, material-handling systems and other high-power industrial machinery.

The catalog number 20G11LF590AN0NNNNN represents a specific factory configuration. Different suffixes within the same basic 590 A family can change certain configuration details, so models with similar catalog numbers should not automatically be treated as identical replacements.

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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 Variable Frequency AC Drive
Catalog Number	20G11LF590AN0NNNNN
Cooling Method	Air Cooled
Frame Class	Frame 9 class
Input Voltage	690 VAC
Input Phase	Three Phase
Rated 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
Enclosure Class	Type 1 / IP20 class
Input Arrangement	AC Input with Precharge
DC Terminals	Yes
Filtering	EMC Filter
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Cooling	Forced Air
Size	800 mm depth class
Weight	Configuration-dependent

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3. Basic Technical Parameters

Parameter	Specification
Model	20G11LF590AN0NNNNN
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Drive Type	Adjustable Frequency AC Drive
Input Voltage	690 VAC
Input Phase	3 Phase
Output Current	590 A
Light-Duty Power	630 kW
Normal-Duty Power	560 kW
Heavy-Duty Power	450 kW
Cooling	Air Cooled
Frame	Frame 9 class
Input Type	AC Input with Precharge
DC Terminals	Yes
Filtering	EMC Filter
Dynamic Braking	None
Installation	800 mm Deep MCC Style
Enclosure	Type 1 / IP20 class
Communication	Embedded EtherNet/IP
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent; verify exact configured assembly
Typical Motor Class	Large Industrial AC Motors
Typical Application Level	High-Power Industrial Motor Control

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4. Electrical Rating

The 590 A output-current rating is one of the main characteristics of the 20G11LF590AN0NNNNN.

This current level places the drive well above the compact and general-purpose drive category.

It is intended for large industrial motors where the motor current, mechanical load and process requirements exceed the practical range of smaller variable frequency drives.

The approximate duty ratings are:

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

The duty classification is important.

A drive used on a centrifugal fan may have relatively smooth loading and limited overload requirements.

A conveyor, crusher or mixer may require much higher starting torque and greater overload capability.

For that reason, the motor should be selected according to actual current and load characteristics rather than simply matching the nominal motor kW to the drive’s maximum published rating.

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5. Light-Duty Rating

The Light-Duty rating is approximately 630 kW.

This rating is appropriate for applications where the motor normally operates with relatively smooth loading and does not experience severe overload conditions.

Typical examples include:

• Large centrifugal pumps
• Large fans
• Industrial blowers
• Cooling systems
• Ventilation systems
• Water circulation equipment
• Process circulation pumps
• Large air-handling equipment

The Light-Duty rating allows the drive to control motors in the several-hundred-kilowatt range while maintaining adjustable-speed operation.

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6. Normal-Duty Rating

The Normal-Duty rating is approximately 560 kW.

Normal-Duty operation is intended for industrial loads that require continuous operation with moderate overload capability.

Typical applications include:

• Large pumps
• Conveyors
• Fans
• Blowers
• Process machinery
• Material-handling systems
• Industrial production equipment

The motor’s actual full-load current remains the primary parameter for final drive sizing.

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7. Heavy-Duty Rating

The Heavy-Duty rating is approximately 450 kW.

Heavy-Duty applications generally involve higher torque requirements, higher mechanical inertia or more frequent overload conditions.

Typical examples include:

• Heavy conveyors
• Crushers
• Mixers
• Material-processing equipment
• Mining equipment
• Bulk-material handling
• High-inertia machinery

When an application has frequent starts, rapid acceleration, high starting torque or repeated overloads, the Heavy-Duty rating should receive particular attention.

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8. 690 VAC Voltage Class

The 20G11LF590AN0NNNNN is designed for a 690 VAC three-phase electrical system.

This voltage class is widely associated with larger industrial motor systems.

For a given motor power, a higher motor voltage can reduce the current required compared with an equivalent motor operating at a lower voltage.

This can influence the design of:

• Motor feeders
• Power cables
• Switchgear
• Transformers
• Motor control centers
• Electrical distribution systems
• Protection equipment

A 690 VAC system should nevertheless be evaluated as a complete electrical system, including transformer arrangement, grounding method, short-circuit characteristics and motor insulation requirements.

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9. Output Current

The nominal output-current class is 590 A.

This is a significant current capacity and is intended for large industrial motors.

The current rating is particularly important because motor current changes with:

• Motor load
• Motor voltage
• Motor power factor
• Motor efficiency
• Speed
• Torque
• Duty cycle
• Acceleration requirements

The final motor selection should therefore be based on the actual motor nameplate and operating conditions.

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10. Physical Size

The model belongs to an 800 mm deep MCC-style configuration.

The 800 mm dimension is important for electrical-room and cabinet planning.

However, the complete enclosure width and height can depend on the final configuration.

Therefore, the physical parameters should be treated as follows:

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

For an actual cabinet design, transportation plan or lifting plan, the exact configured unit should be checked before fabrication.

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11. Weight

Because the 20G11LF590AN0NNNNN is a large-frame industrial drive, its physical handling requirements are considerably greater than those of compact drives.

The actual equipment weight can vary with the physical configuration.

Additional equipment, cabinet sections, disconnecting devices, auxiliary components and packaging can also change the final shipping weight.

Weight Parameter	Specification
Drive Category	High-Power Industrial Drive
Frame	Frame 9 class
Equipment Weight	Configuration-dependent
Weight (kg)	Configuration-dependent
Shipping Weight	Higher than equipment-only weight may apply
Cabinet Weight	Depends on complete assembly
Lifting Requirement	Based on final equipment weight
Floor Loading	Should be checked during installation design

For this reason, it is preferable to use the exact mechanical configuration when calculating lifting capacity and floor loading instead of using a generic frame weight.

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12. Enclosure

The product is associated with a Type 1 / IP20 class industrial enclosure arrangement.

This type of construction is intended for installation in a suitable protected industrial electrical environment.

It is not intended to be treated as a weatherproof outdoor drive without an appropriate enclosure or environmental protection system.

The installation area should provide:

• Controlled ambient temperature
• Adequate ventilation
• Protection from excessive moisture
• Protection from conductive contamination
• Appropriate dust control
• Proper grounding
• Sufficient maintenance access
• Suitable cable routing

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13. Cooling System

The 20G11LF590AN0NNNNN uses an air-cooled design.

High-power semiconductor switching devices generate substantial heat during operation.

The cooling system transfers this heat away from the power electronics.

For this reason, airflow is an important part of the installation.

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

Poor ventilation can increase operating temperature and may reduce the expected service life of power components.

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14. AC Input and Precharge

The catalog configuration uses an AC input with precharge.

Precharge is important in high-power drives because the DC-link capacitors need to be charged in a controlled manner during startup.

A simplified power path is:

690 VAC Three-Phase Supply

↓

AC Input

↓

Precharge Circuit

↓

Rectifier

↓

DC Link

↓

Inverter

↓

Variable-Frequency AC Output

↓

Large AC Motor

The inverter controls the output voltage and frequency to regulate motor speed and torque.

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15. DC Terminals

The configuration includes DC terminals.

DC terminals provide additional flexibility for certain power-system arrangements.

They may be useful in applications involving:

• Common DC bus systems
• DC-link connections
• Regenerative system architectures
• Multi-drive power arrangements

The actual use of the DC terminals must be based on the complete electrical design.

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16. EMC Filtering

The model is configured with an EMC filter.

Variable frequency drives use high-frequency switching to generate the motor output waveform.

This switching process can create high-frequency electrical components.

Filtering helps with overall electromagnetic compatibility and can reduce unwanted electrical noise in a properly engineered installation.

Other installation factors remain important, including:

• Grounding
• Shielding
• Motor-cable routing
• Cable separation
• Cabinet bonding
• Control-cable routing

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17. Dynamic Braking

The catalog configuration specifies:

Dynamic Braking: None

This is important when evaluating applications that require rapid deceleration.

For high-inertia machinery, the designer should determine whether the motor and load can decelerate naturally or whether a dedicated braking arrangement is necessary.

Applications that may require particular attention include:

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

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18. Embedded EtherNet/IP

The PowerFlex 755 platform supports industrial communication through embedded EtherNet/IP.

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

Typical information exchanged with a control system may include:

Information	Typical Purpose
Start Command	Motor start
Stop Command	Motor stop
Speed Reference	Speed control
Actual Speed	Monitoring
Output Current	Load monitoring
Output Frequency	Operating-state monitoring
Drive Status	System control
Warning Status	Preventive maintenance
Fault Status	Troubleshooting
Reset Command	Fault recovery
Diagnostic Information	Maintenance

This communication capability is useful in plants where drives are integrated into centralized automation and supervisory systems.

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19. Product Introduction

The 20G11LF590AN0NNNNN is a high-power adjustable frequency AC drive designed for controlling large three-phase motors.

Its primary purpose is to convert fixed-frequency electrical power into a controlled variable-frequency motor supply.

Instead of operating a large motor continuously at a single fixed speed, the drive allows the motor operating point to be adjusted.

This is particularly useful when the process does not always require maximum motor speed.

For example, a large pump may require different flow rates at different times.

A large fan may need reduced airflow during low-demand periods.

A conveyor may need to operate at different speeds depending on production requirements.

A process machine may need controlled acceleration and deceleration.

The drive provides the electrical control platform needed for these operating conditions.

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20. Main Product Advantages

20.1 High Current Capacity

The 590 A output-current class provides substantial capacity for large industrial motors.

This allows the drive to be used in applications that are beyond the practical range of compact variable frequency drives.

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20.2 High Power Capability

With approximately 630 kW Light-Duty, 560 kW Normal-Duty and 450 kW Heavy-Duty capability, the product is suitable for demanding industrial motor systems.

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20.3 690 VAC Industrial Platform

The 690 VAC voltage class makes the product suitable for large motor installations.

It is particularly relevant in industrial plants with medium-to-high power motor systems.

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20.4 Adjustable Motor Speed

The drive can regulate motor speed instead of simply switching the motor between stopped and full-speed operation.

This can improve process flexibility.

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20.5 Controlled Acceleration

Large motors and machines can contain considerable mechanical inertia.

Controlled acceleration can reduce sudden mechanical stress on:

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

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20.6 Process Control

Variable-speed operation can be used to control:

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

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20.7 Industrial Communication

Embedded EtherNet/IP makes the drive suitable for integration into automated industrial control systems.

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20.8 High-Power Industrial Construction

The PowerFlex 755 platform is designed for industrial environments where high motor power, variable-speed operation and system integration are important.

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21. Pump Applications

Large pumps are one of the most common applications for variable-speed drives.

A pump does not necessarily need to operate at maximum speed continuously.

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

Potential applications include:

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

Variable-speed operation can also reduce the need for excessive throttling in certain pump systems.

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22. Fan and Blower Applications

Large fans and blowers can consume significant amounts of electrical power.

The drive can adjust the motor speed according to the required airflow.

Potential applications include:

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

The 590 A class makes the drive suitable for much larger fan systems than compact drives.

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23. Conveyor Applications

Large conveyors can have considerable inertia.

Starting a large conveyor directly can result in significant mechanical and electrical stress.

A variable frequency drive can provide a controlled acceleration profile.

Benefits may include:

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

Potential applications include:

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

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24. Crusher Applications

Crushers can experience changing mechanical loads.

A crusher motor may need substantial torque during certain parts of its operating cycle.

The Heavy-Duty rating of approximately 450 kW makes this drive a possible candidate for appropriately sized crusher motors.

The actual motor current and overload requirements should always be checked before final selection.

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25. Compressor Applications

Large compressors can require considerable motor power.

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

Potential applications include:

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

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

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26. Mixer Applications

Large mixers can require high starting torque, especially when the vessel is already loaded.

The drive can provide a controlled acceleration profile and adjustable motor speed.

Potential industries include:

• Chemical processing
• Cement
• Minerals
• Bulk materials
• Food processing
• General manufacturing
• Process industries

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27. Mining Applications

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

Potential applications include:

Equipment	Drive Application
Conveyor	Variable Speed
Crusher	Heavy-Duty Motor Control
Pump	Flow Control
Fan	Ventilation Control
Material Handling	Controlled Acceleration
Processing Equipment	Process Speed Control
Bulk Handling	Speed Coordination

Mining environments require special attention to dust, temperature, ventilation and mechanical loading.

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28. Cement and Aggregate Applications

Cement and aggregate plants frequently use large motors.

Typical equipment includes:

• Crushers
• Conveyors
• Large fans
• Blowers
• Pumps
• Mixers
• Material-processing machinery

The drive can be used where variable-speed control and controlled motor acceleration are required.

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29. Water and Wastewater Applications

Large water and wastewater facilities often contain motors in the hundreds-of-kilowatts range.

Possible applications include:

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

The drive can adjust motor speed according to flow, pressure or process demand.

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30. Energy Efficiency

A major advantage of variable-speed operation is the ability to match motor speed to actual process requirements.

This can be particularly useful for centrifugal pumps and fans.

For these applications, reducing speed can produce a disproportionately large reduction in mechanical power demand.

The actual energy savings depend on:

• Load profile
• Operating hours
• Required flow
• Required pressure
• Pump efficiency
• Fan efficiency
• Motor efficiency
• Existing throttling method
• Mechanical transmission efficiency

Therefore, the energy-saving potential should be calculated from the actual process data.

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31. Motor Selection Requirements

The motor should be matched to the drive based on actual electrical characteristics.

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
Insulation System	High
Motor Cable Length	High
Load Characteristics	Critical

For a 590 A drive, motor current is particularly important.

A motor should not be selected solely because its kW value appears below the drive’s kW rating.

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32. Installation Requirements

Installation Parameter	Recommended Consideration
Input Voltage	690 VAC
Input Phase	Three Phase
Motor Voltage	Confirm motor nameplate
Motor Current	Confirm actual motor current
Motor Power	Compare with duty rating
Duty Class	Select according to load
Cooling	Provide adequate airflow
Ambient Temperature	Confirm site conditions
Dust	Control contamination
Grounding	Proper grounding required
Motor Cable	Correctly sized
Cable Routing	Maintain appropriate separation
Cabinet Depth	800 mm
Cabinet Width	Confirm final configuration
Cabinet Height	Confirm final configuration
Weight (kg)	Confirm final configured unit
Maintenance Clearance	Provide adequate space
Communication	Confirm required network architecture

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33. Maintenance Considerations

A high-power air-cooled drive should be included in the site’s preventive-maintenance program.

Inspection should normally cover:

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

Dust and contamination should be controlled because restricted airflow can increase component temperature.

Electrical connections should also be periodically inspected according to the site’s maintenance procedures.

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34. Five Same-Series or Closely Related Models

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

They are selected around the same high-power 690 VAC range and are particularly useful when comparing current capacity, power rating and factory configuration.

Model	Series	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	Size / Depth	Weight (kg)
20G11LF590AN2NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm depth class	Configuration-dependent
20G11LF590JN0NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm depth	Configuration-dependent
20G11LF590JN2NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm depth	Configuration-dependent
20G11LF590JN4NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm depth	Configuration-dependent
20G11LF650AN0NNNNN	PowerFlex 755	690 VAC	650 A	710 kW	630 kW	500 kW	800 mm depth class	Configuration-dependent

The first four models are especially close to the requested catalog number.

The fifth model provides a useful step upward in current and power capacity.

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35. Related Model — 20G11LF590AN2NNNNN

The 20G11LF590AN2NNNNN is a closely related 590 A configuration.

Parameter	20G11LF590AN2NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Input	AC Input with Precharge
DC Terminals	Yes
Filtering	EMC Filter
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 one of the closest alternatives because the electrical rating remains at 590 A.

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36. Related Model — 20G11LF590JN0NNNNN

The 20G11LF590JN0NNNNN is another closely related configuration.

Parameter	20G11LF590JN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Input	AC Input with Precharge
Filtering	EMC Filter
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

The main difference is the factory configuration represented by the catalog suffix.

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37. Related Model — 20G11LF590JN2NNNNN

The 20G11LF590JN2NNNNN is another 590 A PowerFlex 755 configuration.

Parameter	20G11LF590JN2NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Input Type	AC Input with Precharge
Filtering	Filtered
CM Configuration	Installed jumper configuration
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

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38. Related Model — 20G11LF590JN4NNNNN

The 20G11LF590JN4NNNNN is another closely related 590 A configuration.

Parameter	20G11LF590JN4NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	590 A
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	450 kW
Cooling	Air Cooled
Input	AC Input with Precharge
Filtering	EMC Filter
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 comparison model when the application requires the same basic 590 A electrical capacity.

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39. Related Higher-Capacity Model — 20G11LF650AN0NNNNN

The 20G11LF650AN0NNNNN provides a higher current capacity than the requested model.

Parameter	20G11LF650AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	650 A
Light Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Cooling	Air Cooled
Input	AC Input with Precharge
Installation	800 mm MCC Style
Depth	800 mm class
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Typical Application	Large Pumps, Fans, Conveyors, Process Machinery

This model is useful when the motor current is above the practical range of the 590 A configuration.

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40. Five Representative Popular Models from the Same Brand

The following five models represent different size ranges within the same Allen-Bradley drive portfolio.

They are not direct replacements for the 590 A model.

They are useful as comparison products when the motor power is smaller or when a compact drive is preferred.

Model	Series	Voltage Class	Current Class	Typical Power Range	Typical Application	Dimensions	Weight (kg)
25B-D010N104	PowerFlex 525	480 VAC class	10 A class	Small motor	Pumps / Fans	Compact, frame-dependent	Configuration-dependent
25B-D017N104	PowerFlex 525	480 VAC class	17 A class	Small motor	Conveyors / Fans	Compact, frame-dependent	Configuration-dependent
25B-D027N114	PowerFlex 525	480 VAC class	27 A class	Small-to-medium motor	Pumps / Machinery	Compact, frame-dependent	Configuration-dependent
20F11ND077AA0NNNNN	PowerFlex 753	480 VAC class	77 A class	Medium motor	Pumps / Fans / Conveyors	Frame-dependent	Configuration-dependent
20G11LF650AN0NNNNN	PowerFlex 755	690 VAC	650 A	710 kW LD	Large Industrial Motors	800 mm depth class	Configuration-dependent

These models cover a wide range of motor sizes and application requirements.

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41. 25B-D010N104

The 25B-D010N104 is a compact variable frequency drive designed for substantially smaller motor systems.

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

This type of drive is appropriate where the motor power is far below the requirement of a 590 A high-power drive.

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42. 25B-D017N104

The 25B-D017N104 provides a higher current class while remaining within the compact-drive category.

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

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43. 25B-D027N114

The 25B-D027N114 is another compact model for applications requiring more current than the smaller 525 configurations.

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

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44. 20F11ND077AA0NNNNN

The 20F11ND077AA0NNNNN belongs to the PowerFlex 753 family and is designed for larger industrial machinery than the compact 525 models.

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

This model provides a useful middle point between compact motor control and high-power PowerFlex 755 systems.

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45. 20G11LF650AN0NNNNN

The 20G11LF650AN0NNNNN is the closest high-power comparison among the broader selection.

Parameter	20G11LF650AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	650 A
Light Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Cooling	Air Cooled
Input	AC Input with Precharge
DC Terminals	Yes
Installation	800 mm MCC Style
Depth	800 mm class
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Typical Application	Large Pumps
Typical Application	Large Fans
Typical Application	Conveyors
Typical Application	Process Machinery

Compared with the requested 590 A model, the 650 A configuration provides additional current and power capacity.

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46. 590 A and 650 A Model Comparison

Parameter	20G11LF590AN0NNNNN	20G11LF650AN0NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	690 VAC	690 VAC
Current	590 A	650 A
Light Duty	630 kW	710 kW
Normal Duty	560 kW	630 kW
Heavy Duty	450 kW	500 kW
Cooling	Air Cooled	Air Cooled
Installation	800 mm MCC Style	800 mm MCC Style
Depth	800 mm	800 mm class
Width	Configuration-dependent	Configuration-dependent
Height	Configuration-dependent	Configuration-dependent
Weight (kg)	Configuration-dependent	Configuration-dependent
Best Use	Large Motor Applications	Higher-Power Large Motors

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47. 590 A Model Family Comparison

Model	Current	Light Duty	Normal Duty	Heavy Duty	Voltage	Depth	Weight (kg)
20G11LF590AN0NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	800 mm	Configuration-dependent
20G11LF590AN2NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	800 mm	Configuration-dependent
20G11LF590JN0NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	800 mm	Configuration-dependent
20G11LF590JN2NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	800 mm	Configuration-dependent
20G11LF590JN4NNNNN	590 A	630 kW	560 kW	450 kW	690 VAC	800 mm	Configuration-dependent

These catalog numbers are closely related electrically. The differences are primarily associated with factory configuration and option coding.

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48. PowerFlex 755 High-Power Comparison

Model	Voltage	Current	LD	ND	HD	Cooling	Depth	Weight (kg)
20G11LF590AN0NNNNN	690 VAC	590 A	630 kW	560 kW	450 kW	Air	800 mm	Configuration-dependent
20G11LF650AN0NNNNN	690 VAC	650 A	710 kW	630 kW	500 kW	Air	800 mm class	Configuration-dependent
20G11LF710AN0NNNNN	690 VAC	710 A	800 kW	710 kW	590 kW	Air	800 mm class	Configuration-dependent
20G11LF765AN0NNNNN	690 VAC	765 A	850 kW	750 kW	630 kW	Air	800 mm class	Configuration-dependent
20G11LF795AN0NNNNN	690 VAC	795 A	900 kW	800 kW	710 kW	Air	800 mm class	Configuration-dependent

This table illustrates how the PowerFlex 755 high-power range increases in current and power capability.

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49. Application Selection Guide

Application	Recommended Duty	Suitability of 590 A Model
Large Centrifugal Pump	Light / Normal	Excellent
Large Fan	Light / Normal	Excellent
Large Blower	Light / Normal	Excellent
Water Pumping Station	Normal	Excellent
Large Conveyor	Normal / Heavy	Good, if current is suitable
Crusher	Heavy	Suitable when within 450 kW HD rating
Large Mixer	Heavy	Suitable when within current and overload limits
Mining Fan	Light / Normal	Excellent
Mining Conveyor	Normal / Heavy	Good
Cement Equipment	Normal / Heavy	Good
Process Compressor	Application-dependent	Good when correctly sized
Material Handling	Normal / Heavy	Good
Industrial Process Machine	Normal	Excellent

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50. Advantages Compared with a Fixed-Speed Motor System

A conventional fixed-speed motor arrangement normally provides limited control over motor speed.

A variable frequency drive changes this operating model.

With the 20G11LF590AN0NNNNN, the motor can be integrated into the process-control strategy.

This provides several practical advantages.

Adjustable Speed

The motor can operate at different speeds according to process requirements.

Controlled Starting

The motor can accelerate gradually instead of receiving an abrupt full-speed starting command.

Process Matching

Motor speed can be adjusted to match flow, pressure, airflow or production demand.

Reduced Mechanical Shock

Controlled acceleration can reduce sudden loading on mechanical components.

Automation Integration

Drive status and operating parameters can be incorporated into the plant automation system.

Large Motor Capability

The 590 A rating allows the product to address large industrial motor applications.

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51. Advantages in Pump Systems

For pump applications, the most important advantage is the ability to control flow by changing motor speed.

This can reduce the need to operate a pump continuously at maximum speed.

Potential benefits include:

• Better flow matching
• Better pressure control
• Reduced throttling
• Smoother startup
• Reduced mechanical stress
• Improved process flexibility
• Potential energy savings

The actual energy savings depend on the pump curve and system operating profile.

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52. Advantages in Fan Systems

For fans and blowers, variable-speed operation can provide better airflow control.

Instead of continuously operating the fan at maximum speed, the drive can adjust speed according to demand.

Potential advantages include:

• Adjustable airflow
• Better ventilation control
• Reduced mechanical stress
• Smooth startup
• Process flexibility
• Potential energy reduction

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53. Advantages in Conveyor Systems

Large conveyors benefit from controlled acceleration.

A high-power conveyor can contain substantial inertia.

Abrupt starting can place high loads on:

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

A variable-speed drive can provide a controlled ramp.

It can also allow the conveyor to run at different speeds according to production requirements.

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54. Advantages in Process Machinery

Process machinery frequently requires different operating speeds.

For example, a mixer may need a slow speed during loading and a higher speed during processing.

A process pump may need different flow rates.

A blower may need different airflow levels.

A conveyor may need different material-handling rates.

The drive provides a common electrical platform for these types of variable-speed requirements.

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55. Control and Automation Advantages

The embedded communication capability makes the drive suitable for automated industrial systems.

A supervisory controller can potentially manage:

• Start and stop
• Speed reference
• Operating mode
• Fault reset
• Status monitoring
• Current monitoring
• Frequency monitoring
• Alarm monitoring
• Diagnostic information

This can simplify integration into a larger automation architecture.

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56. Practical Selection Advice

When selecting the 20G11LF590AN0NNNNN, the most important point is not simply the motor horsepower.

The following parameters should be considered together:

1. Motor voltage
2. Motor full-load current
3. Motor power
4. Required speed range
5. Starting torque
6. Continuous torque
7. Overload requirements
8. Acceleration time
9. Deceleration time
10. Load inertia
11. Operating environment
12. Ambient temperature
13. Motor-cable length
14. Grounding arrangement
15. Required communications
16. Cabinet dimensions
17. Cooling requirements
18. Required braking method
19. Maintenance requirements
20. Available electrical protection

This is especially important for a 590 A high-power drive.

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57. Mechanical Design Considerations

The 800 mm depth should be incorporated into the electrical-room layout.

In addition to the drive itself, the designer should consider:

• Cable bending radius
• Incoming power cables
• Motor cables
• Control cables
• Ventilation
• Service access
• Maintenance clearance
• Heat dissipation
• Lifting and transportation
• Adjacent equipment
• Cabinet doors
• Cable-entry arrangements

The exact width and height should be confirmed against the final configured assembly before the cabinet or room layout is finalized.

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58. Weight and Transportation Considerations

A high-power drive should be treated as industrial heavy electrical equipment.

The actual Weight (kg) is configuration-dependent.

The equipment may also be shipped as part of a larger cabinet or MCC arrangement.

Therefore, the following should be checked before transportation:

Transportation Parameter	Requirement
Equipment Weight	Confirm actual value
Weight (kg)	Confirm final configured unit
Shipping Weight	Confirm packaging information
Lifting Points	Confirm equipment design
Floor Loading	Verify site capacity
Door Clearance	Check route
Transport Route	Check access
Crane / Lifting Device	Size according to actual weight
Cabinet Dimensions	Confirm before shipment

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59. Environmental Considerations

The drive should be installed in an environment suitable for industrial electronic equipment.

Particular attention should be paid to:

• Temperature
• Humidity
• Dust
• Corrosive gases
• Conductive contamination
• Vibration
• Altitude
• Ventilation
• Electrical noise
• Grounding

Large air-cooled drives are especially sensitive to restricted airflow.

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60. Summary of the Main Model

Category	20G11LF590AN0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	High-Power Air-Cooled AC Drive
Input Voltage	690 VAC
Input Phase	Three Phase
Current Rating	590 A
Light-Duty Rating	630 kW
Normal-Duty Rating	560 kW
Heavy-Duty Rating	450 kW
Cooling	Air Cooled
Frame	Frame 9 class
Input Type	AC Input with Precharge
DC Terminals	Yes
Filtering	EMC Filter
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Enclosure	Type 1 / IP20 class
Installation	800 mm Deep MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Typical Applications	Pumps, Fans, Blowers, Conveyors, Compressors, Crushers, Mixers
Application Level	High-Power Industrial Motor Control

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61. Final Evaluation

The 20G11LF590AN0NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor systems.

Its 590 A current rating, 690 VAC voltage class, and approximately 630 kW Light-Duty, 560 kW Normal-Duty and 450 kW Heavy-Duty ratings place it firmly in the large industrial drive category.

It is particularly suitable for applications where the motor must operate at variable speed instead of simply running continuously at a fixed speed.

For large pumps and fans, variable-speed control can allow motor operation to follow actual process demand.

For conveyors, mixers and other high-inertia machinery, controlled acceleration can reduce mechanical stress.

For mining, cement, aggregate and process industries, the high-current architecture provides a practical solution for large motor systems.

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

The 800 mm deep MCC-style construction should be considered during electrical-room and cabinet planning.

The width and height are configuration-dependent, and the exact weight in kg should be verified from the final configured equipment rather than estimated from the catalog number alone.

The closest comparison models are the other 590 A PowerFlex 755 configurations, while the 650 A, 710 A, 765 A and 795 A configurations provide progressively greater current and power capacity.

For smaller motors, compact models from the PowerFlex 525 family or mid-range models from the PowerFlex 753 family can provide a more appropriately sized solution.

In practical terms, the 20G11LF590AN0NNNNN is best viewed as a 690 VAC, 590 A, high-power variable frequency drive for large industrial AC motors, with particular value in pumping, ventilation, conveying, process machinery, mining, material handling and other applications requiring reliable variable-speed motor control.