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1. Product Overview

The 20G11LE595AN0NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control applications.

It is a 600 VAC, three-phase, 595 A, Frame 9, air-cooled packaged drive intended for applications where a large motor needs controlled starting, stopping, acceleration, deceleration and variable-speed operation.

The drive is particularly suitable for large pumps, fans, blowers, conveyors, material-handling systems, process machinery, mining equipment, cement and aggregate equipment, and other industrial machines requiring substantial motor power.

The 595 A current rating places this model in the high-power section of the PowerFlex 755 family. It is considerably larger than compact and medium-power variable-frequency drives and is intended for industrial installations with dedicated electrical and mechanical infrastructure.

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2. Brand and Product Series

The most important identification point is that 20G11LE595AN0NNNNN belongs to the PowerFlex 755 series.

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3. Detailed Product Introduction

The 20G11LE595AN0NNNNN is intended to provide precise electrical control of large AC motors.

In a conventional motor starter arrangement, the motor may essentially receive full electrical power whenever it is started. A high-power variable-frequency drive works differently. It controls the electrical frequency and voltage supplied to the motor so that motor speed can be adjusted according to the process.

This gives the machine operator much greater control over the motor.

For example, a large industrial pump does not necessarily need to run at full speed at all times. A conveyor may need to operate at different speeds depending on production requirements. A fan may need reduced airflow during periods of lower demand.

With a suitable variable-speed drive, motor operation can be matched more closely to the actual process requirement.

The 20G11LE595AN0NNNNN is therefore best understood as a large industrial motor-control platform, rather than simply as an electronic speed controller.

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4. Main Technical Parameters

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5. Voltage Specification

The model belongs to the 600 VAC three-phase class.

This is a very important selection characteristic.

The drive should be used with an electrical system that matches its rated voltage class. When selecting a replacement, the input voltage should be checked before comparing horsepower or current.

A drive designed for a different voltage class should not be regarded as a direct substitute simply because its current rating appears similar.

The motor’s nameplate voltage should also be checked.

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6. Output Current — 595 A

The 595 A output rating is one of the most important characteristics of this model.

A 595 A drive is intended for large motors and substantial industrial loads.

The actual motor selection should be based on the motor’s rated current, duty requirements and application conditions.

Horsepower alone should not be used as the only selection criterion.

For example, two motors with similar horsepower may have different current requirements because of differences in:

• Motor efficiency
• Motor voltage
• Power factor
• Motor design
• Duty cycle
• Operating speed
• Starting requirements
• Load characteristics

Therefore, the motor nameplate current remains a critical reference when selecting a drive.

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7. Duty Ratings

The model has different horsepower capacities depending on the duty classification.

This distinction is important for industrial applications.

A centrifugal pump or fan may have relatively predictable operating conditions and may be suitable for a normal-duty application.

A conveyor or machine that starts with a heavy load may require greater overload capability and therefore may need to be considered using the heavy-duty rating.

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8. What Is Light Duty?

Light-duty operation generally refers to applications where the drive is not exposed to severe overload conditions.

Typical examples may include:

• Large centrifugal fans
• Certain centrifugal pumps
• Large ventilation equipment
• Some continuous-process applications

The exact suitability still depends on the actual load curve and operating cycle.

The 700 HP light-duty rating provides the highest nominal horsepower figure associated with this configuration.

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9. What Is Normal Duty?

The normal-duty rating is approximately 600 HP.

This rating is relevant for applications with a more conventional industrial load profile.

Examples can include:

• Process pumps
• Industrial fans
• Blowers
• Conveyors with moderate loading
• General process machinery

The normal-duty rating is often a useful reference when matching the drive with a motor used in continuous industrial service.

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10. What Is Heavy Duty?

The heavy-duty rating is approximately 500 HP.

Heavy-duty applications can involve:

• High starting torque
• Frequent acceleration
• High mechanical inertia
• Repeated loading
• Significant overload requirements
• Difficult starting conditions

Typical examples can include certain conveyors, crushers, material-handling equipment and heavy process machinery.

The lower horsepower figure under heavy-duty operation does not mean the drive is weaker. It reflects the greater electrical and thermal demands associated with the heavy-duty operating profile.

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11. Frame Size

The 20G11LE595AN0NNNNN is a Frame 9 configuration.

Frame size is important because it relates to the physical size and power capacity of the drive.

A Frame 9 drive requires significantly more installation space than compact low-power drives.

This means that installation planning should consider:

• Cabinet dimensions
• Floor space
• Cable entry
• Cable bending radius
• Ventilation
• Maintenance access
• Lifting requirements
• Heat dissipation

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12. Dimensions

The model uses an 800 mm deep MCC-style cabinet arrangement.

The 800 mm depth is an important mechanical specification when planning an installation.

Because high-power packaged drives can contain different cabinet arrangements and options, the overall width and height should not be guessed.

For engineering drawings, panel fabrication and transportation planning, the exact dimensions of the supplied configuration should be used.

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13. Weight

The complete equipment weight is configuration dependent.

This point is especially important for a Frame 9 high-power drive.

The total weight can be influenced by:

• Cabinet construction
• Installed options
• Input protection
• Reactor arrangement
• Power wiring arrangement
• Additional option compartments
• Packaging

Therefore, an exact kilogram figure should not be invented when the complete configuration is not specified.

For transportation and installation, the final shipping documentation should be used to determine the actual weight in kilograms.

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14. Cooling System

The drive uses an air-cooled design.

For a high-power drive, thermal management is extremely important.

The installation area should provide sufficient ventilation and heat removal.

Particular attention should be given to:

• Air inlet temperature
• Airflow
• Cooling fans
• Cabinet ventilation
• Dust accumulation
• Filter condition where applicable
• Room temperature
• Heat generated by other equipment

Poor ventilation can shorten component life and may result in thermal alarms or shutdowns.

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15. Enclosure and Protection

The model is associated with a Type 1 / IP20, 800 mm deep MCC-style configuration.

This type of installation is intended for an appropriately protected industrial electrical environment.

It is not intended to be treated as a weatherproof outdoor drive.

The installation should provide protection against unsuitable environmental conditions such as:

• Rain
• Direct water
• Condensation
• Excessive dust
• Conductive contamination
• Corrosive atmosphere
• Excessive humidity

Environmental conditions are particularly important for large drives because contamination can affect cooling, insulation and electrical connections.

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16. Embedded EtherNet/IP

The drive incorporates embedded EtherNet/IP communication.

This allows the drive to become part of a modern industrial control architecture.

A supervisory control system can potentially exchange information such as:

• Start command
• Stop command
• Speed reference
• Direction
• Running status
• Ready status
• Fault status
• Warning status
• Actual speed
• Output current
• Drive condition

This can reduce the amount of individual hardwired control required in a larger automated system.

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17. Typical Applications

17.1 Large Pumps

The drive is highly suitable for large pump systems.

Pump speed can be adjusted according to actual process requirements.

Potential applications include:

• Water transfer
• Cooling-water systems
• Industrial circulation
• Process pumping
• Water treatment
• Large pumping stations
• Industrial fluid transfer

Variable-speed control can provide greater flexibility than operating the pump continuously at full speed.

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17.2 Large Fans

Large fans are another important application.

The drive can adjust fan speed according to airflow requirements.

Typical applications include:

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

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17.3 Large Blowers

Industrial blowers can require substantial motor power.

The drive can provide controlled speed and acceleration while allowing the blower output to be adjusted according to process requirements.

Typical applications include:

• Process air
• Combustion air
• Industrial ventilation
• Pneumatic processes
• Air circulation
• Dust collection systems

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17.4 Conveyors

Large conveyors can have significant starting torque requirements.

The drive can provide controlled acceleration and speed adjustment.

Typical applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk-material handling
• Production conveyors
• Warehouse material handling

Controlled acceleration can help reduce sudden mechanical stress on the conveyor system.

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17.5 Mining

High-power drives are widely suited to demanding mining applications.

Possible applications include:

• Ore conveyors
• Material transfer
• Mine ventilation
• Dewatering pumps
• Processing equipment
• Bulk material handling

Mining installations require particular attention to environmental conditions, dust, temperature and maintenance.

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17.6 Cement and Aggregate

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

Potential applications include:

• Conveyors
• Fans
• Blowers
• Pumps
• Material-handling equipment
• Dust-control systems
• Process machinery

Variable-speed control can improve process flexibility.

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18. Product Advantages

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19. Energy Efficiency Benefits

A variable-frequency drive can allow a motor to operate at a speed closer to the actual process requirement.

This can be especially useful in variable-torque applications such as centrifugal pumps and fans.

For example, when a pump does not need maximum flow, reducing motor speed can be more efficient than keeping the motor at full speed and restricting flow using a valve.

Potential benefits include:

• Reduced unnecessary motor speed
• Improved process control
• Reduced throttling losses
• Better flow control
• Better pressure control
• Reduced mechanical stress
• Potential energy savings

Actual energy savings depend on the motor, load profile and process conditions.

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20. Mechanical Advantages

Controlled motor acceleration can reduce sudden mechanical loading.

This can be beneficial for:

• Gearboxes
• Shafts
• Couplings
• Bearings
• Belts
• Conveyor systems
• Pump assemblies
• Fan assemblies

For large machines, reducing mechanical shock can contribute to smoother operation.

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21. Automation Advantages

The drive can be integrated into a broader automation system.

Possible control functions include:

• Remote start
• Remote stop
• Speed control
• Direction control
• Fault monitoring
• Warning monitoring
• Current monitoring
• Actual speed monitoring
• Drive status monitoring

For a large production facility, this can simplify centralized monitoring and operation.

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22. Maintenance Considerations

High-power drives require a planned maintenance approach.

A high-power drive can be an important production asset, so preventive maintenance is generally preferable to waiting for a failure.

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23. Recommended Same-Series Models

The following models are closely related PowerFlex 755 configurations and are useful for capacity comparison.

These models provide a useful progression around the 595 A model.

The 630 A version provides additional current capacity, while the 760 A, 825 A and 900 A configurations are intended for progressively larger motor applications.

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24. Five More Closely Related Configurations

The AN0 and JN0 configurations should not be treated as identical catalog numbers.

The complete catalog number is important because configuration characters can represent differences in filtering, common-mode capacitor configuration and other drive characteristics.

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25. Five Related Models from the Same Brand

For a broader product comparison, the following models cover different capacity ranges and drive families.

These products should not be considered direct substitutes.

The smaller PowerFlex 525 models are designed for substantially smaller motors, while the PowerFlex 753 and PowerFlex 755 families cover larger industrial applications.

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26. Detailed Comparison of the Five Same-Series Recommendations

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27. Application Selection Guide

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28. Important Selection Factors

When selecting the 20G11LE595AN0NNNNN or one of the related models, the following factors should be considered.

Motor Voltage

The motor voltage should be compatible with the drive’s 600 VAC class.

Motor Current

The motor’s full-load current should be compared with the drive rating.

Duty Cycle

Continuous, normal-duty and heavy-duty applications should be evaluated separately.

Starting Torque

Machines requiring high starting torque need more careful drive selection.

Acceleration Time

Large motors and high-inertia loads may require controlled acceleration parameters.

Deceleration

The required stopping time should be considered, particularly for high-inertia machinery.

Environmental Conditions

Temperature, dust, humidity and ventilation should all be evaluated.

Installation Space

The 800 mm cabinet depth should be considered during panel and electrical-room planning.

Weight

The final equipment weight in kg should be confirmed before transportation and lifting.

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29. Product Advantages in Practical Industrial Use

High-Power Capability

The 595 A rating makes the drive appropriate for large industrial motor systems.

Flexible Motor Speed Control

The motor does not have to operate continuously at one fixed speed.

Smooth Acceleration

Controlled acceleration can reduce mechanical stress during starting.

Process Control

Motor speed can be adjusted to suit the process rather than simply turning the motor on or off.

Industrial Network Integration

Embedded EtherNet/IP provides a practical route for integrating the drive into an automated production system.

Large-Scale Industrial Design

The Frame 9 architecture is intended for large industrial applications.

Multiple Duty Ratings

The same basic drive platform can be evaluated against different load classifications.

High-Voltage Motor Compatibility

The 600 VAC class is useful for large industrial motor systems designed around this voltage range.

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30. Key Parameters at a Glance

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31. Final Product Assessment

The 20G11LE595AN0NNNNN is a substantial high-power variable-frequency drive intended for large industrial motor applications.

Its combination of 595 A output current, 600 VAC class operation, Frame 9 construction, air cooling, 800 mm deep MCC-style packaging and embedded EtherNet/IP makes it suitable for large process and production systems.

Its strongest application areas are large pumps, fans, blowers, conveyors, material-handling equipment and other machinery where a large motor needs controlled variable-speed operation.

The 700 HP light-duty, 600 HP normal-duty and 500 HP heavy-duty ratings provide a useful framework for matching the drive to the actual mechanical load.

For engineering selection, however, the motor nameplate current and actual duty cycle should take priority over horsepower alone.

The 800 mm cabinet depth should also be considered when planning installation space, while the exact overall height, width and total weight in kg should be confirmed from the final equipment configuration rather than estimated.

In practical terms, this model is best suited to users looking for a large-capacity industrial AC drive for a 600 VAC three-phase motor system, particularly where reliable speed control, controlled acceleration and industrial automation integration are important.