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20G11LE595JN0NNNNN — Detailed Product Description, Technical Parameters, Applications, Advantages and Related Models

The 20G11LE595JN0NNNNN is a high-power AC variable-frequency drive belonging to the PowerFlex 755 product family. It is intended for large industrial motor-control applications where accurate speed regulation, controlled acceleration and deceleration, high-current output and integration with an industrial automation system are required.

The information below is written as a technical product description suitable for a product catalogue, industrial equipment listing or engineering reference. The model-specific information is separated from values that normally depend on the final enclosure and configuration, so that dimensions and weight are not presented as unnecessarily precise figures when the complete packaged configuration has not been specified.

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1. Product Identification

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2. Product Introduction

The 20G11LE595JN0NNNNN is a large-capacity variable-frequency drive designed for controlling high-power three-phase AC motors.

With an output current rating of approximately 595 A, this model is intended for substantially larger machinery than compact or general-purpose drives. It is particularly appropriate for industrial systems where a large motor needs to start smoothly, operate at variable speed and respond to changing process requirements.

The drive changes the electrical frequency and voltage supplied to the motor, allowing the motor’s operating speed and torque to be controlled according to the requirements of the machine.

This is particularly useful for large pumps, fans, blowers, conveyors, material-handling machinery and other process equipment.

Instead of operating a large motor continuously at full speed, the drive allows the motor to operate closer to the speed actually required by the process.

This can improve process control, reduce mechanical stress and, in suitable variable-torque applications, provide an opportunity for substantial energy savings.

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3. Product Series

The 20G11LE595JN0NNNNN belongs to the PowerFlex 755 series.

The PowerFlex 755 platform is intended for advanced industrial motor-control applications and covers a broad range of power levels.

The 595 A configuration is positioned toward the high-power end of the range and is intended for large industrial installations.

Typical characteristics of this class of drive include:

• High output-current capability
• Three-phase AC motor control
• Adjustable motor speed
• Controlled acceleration
• Controlled deceleration
• Industrial communication
• Extensive motor protection functions
• Industrial cabinet installation
• High-power cooling requirements
• Flexible process-control capability

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4. Main Technical Parameters

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5. Electrical Specifications

The most important electrical parameter of this model is the 595 A output-current rating.

This places the unit in the high-power category.

The exact motor horsepower that can be connected should not be determined from horsepower alone.

For a drive of this size, the actual motor full-load current, duty cycle, overload requirement, motor voltage and application torque profile are more important than simply comparing nameplate horsepower.

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6. 595 A Output Capability

The 595 A output capability is one of the defining characteristics of this model.

A current rating of this magnitude is intended for large industrial motors.

Typical equipment may include motors used for:

• Large pumping systems
• Large industrial fans
• Heavy conveyors
• Blowers
• Mining equipment
• Cement machinery
• Aggregate handling
• Material-processing equipment
• Large ventilation systems
• Industrial process machinery

The actual application rating must be evaluated against the motor’s current and duty requirements.

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7. Duty Selection

Large industrial drives may be operated under different load conditions.

A centrifugal fan, for example, can have a significantly different load characteristic from a heavy conveyor.

This is why a 595 A drive should be selected according to the complete motor/application specification rather than simply matching the motor horsepower.

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8. Dimensions

The model is a large Frame 9-class drive, so it should not be treated as a compact wall-mounted VFD.

The final dimensions depend on the exact mechanical configuration, enclosure arrangement and accessories.

For engineering purposes, the exact dimensional drawing for the particular configured unit should be used before fabricating a cabinet, preparing foundations or planning transportation.

A generic dimensional value should not be substituted for the actual supplied equipment.

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9. Weight

Because this is a high-power packaged drive, the complete equipment weight can vary according to the final configuration.

The power section, cabinet structure, cooling equipment, input arrangement and other options can affect the final mass.

For lifting, shipping and floor-loading calculations, the actual equipment weight in kg should always be confirmed from the final equipment documentation.

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10. Cooling System

The drive uses an air-cooled high-power architecture.

Large AC drives generate considerable heat during operation, particularly when operating at high current for extended periods.

The installation should therefore provide adequate airflow.

Important factors include:

• Ambient temperature
• Airflow
• Cooling-fan condition
• Cabinet ventilation
• Dust accumulation
• Heat generated by adjacent equipment
• Air inlet temperature
• Air outlet temperature
• Room ventilation

The cooling system should be kept clean and unobstructed.

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11. Industrial Construction

The 20G11LE595JN0NNNNN is designed for industrial rather than residential applications.

It is appropriate for installations where equipment may operate continuously for long periods.

Typical environments include:

• Manufacturing plants
• Processing plants
• Water facilities
• Mining facilities
• Cement plants
• Aggregate plants
• Material-handling facilities
• Large mechanical rooms
• Industrial utility systems

Environmental conditions should always be checked before installation.

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12. Motor Control

One of the main functions of the drive is to regulate the speed of an AC motor.

A simplified operating sequence is:

AC power → Drive power section → Variable-frequency output → AC motor → Mechanical load

The drive continuously controls the electrical output according to the required motor operating condition.

This provides considerably more flexibility than a simple across-the-line starter.

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13. Controlled Acceleration

Large motors can draw substantial current during starting.

A drive can gradually increase the motor’s operating frequency instead of immediately applying full operating speed.

This can help reduce:

• Starting shock
• Mechanical impact
• Belt stress
• Coupling stress
• Gearbox shock
• Conveyor tension
• Pump hydraulic shock

For large machinery, smooth acceleration can be particularly valuable.

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14. Controlled Deceleration

The drive can also control motor deceleration.

This is useful when machinery needs to stop smoothly rather than stopping abruptly.

Typical applications include:

• Long conveyors
• Large fans
• Large pumps
• Rotating process equipment
• Material-handling systems
• High-inertia machinery

The appropriate stopping method depends on the load and braking requirements.

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15. Product Applications

15.1 Large Pump Systems

The 20G11LE595JN0NNNNN is well suited to large pump applications.

Examples include:

• Water-transfer pumps
• Industrial circulation pumps
• Cooling-water pumps
• Process pumps
• Large utility pumps
• Industrial wastewater pumping
• Raw-water systems

Variable-speed control allows the pump to respond to process demand.

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15.2 Large Fan Systems

Large industrial fans often operate continuously.

The drive can provide adjustable speed control for:

• Ventilation
• Exhaust systems
• Cooling systems
• Industrial furnaces
• Process ventilation
• Dust extraction
• Air circulation

This can be especially useful where airflow requirements change throughout the production process.

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15.3 Blower Systems

Large blowers can require very high motor power.

Typical applications include:

• Process air
• Industrial ventilation
• Air handling
• Combustion air
• Pneumatic material systems
• Industrial filtration

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15.4 Conveyor Systems

Large conveyors are another important application.

The drive can provide controlled starting and adjustable operating speed.

Potential applications include:

• Mining conveyors
• Bulk-material conveyors
• Aggregate conveyors
• Cement conveyors
• Port material handling
• Production conveyors
• Long-distance conveyors

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15.5 Mining Applications

Large mining machinery often uses high-power electric motors.

Potential applications include:

• Ore conveyors
• Ventilation systems
• Dewatering pumps
• Material-transfer equipment
• Processing machinery

The actual environmental requirements should be evaluated carefully because mining environments can involve dust, vibration and temperature extremes.

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15.6 Cement and Aggregate Equipment

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

Possible applications include:

• Conveyors
• Large fans
• Blowers
• Pumps
• Material-handling systems
• Dust-collection equipment

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16. Main Product Advantages

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17. Energy Efficiency Benefits

A variable-frequency drive can provide significant energy-saving opportunities in suitable applications.

This is especially true for variable-torque loads such as centrifugal pumps and fans.

For example, if a fan does not need full airflow, reducing its speed can reduce the required motor power.

Potential benefits include:

• Reduced unnecessary motor speed
• Reduced throttling losses
• Better process matching
• Improved flow control
• Improved pressure control
• Lower mechanical stress
• Potential reduction in energy consumption

The actual energy savings depend on the machine characteristics and operating profile.

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18. Process-Control Benefits

A major advantage of this type of drive is that motor speed can become part of the overall process-control strategy.

For example:

This provides significantly more control than a basic motor starter.

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19. Industrial Communication

The PowerFlex 755 platform is designed for integration into industrial automation environments.

Depending on the exact configuration, the drive can exchange information such as:

This can simplify integration with PLC-based control systems and plant-level automation.

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20. Maintenance Advantages

The drive can provide useful operating information that assists maintenance personnel.

Important maintenance information can include:

• Drive status
• Motor speed
• Output current
• Fault conditions
• Warning conditions
• Operating status
• Network status
• Temperature-related information

Regular physical maintenance remains necessary.

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21. Five Recommended Models from the Same Series or Closely Related Range

The following models are useful for comparison when evaluating a high-power PowerFlex 755 installation.

The first three choices are especially relevant when maintaining approximately the same 595 A capacity while comparing different configurations.

The 630 A and 760 A models become more relevant when the motor has a higher full-load current or the application requires additional capacity.

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22. Five Related PowerFlex Models

These are primarily useful for capacity comparison.

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

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23. Five Popular Models from the Same Brand

The models above represent different points in the same overall industrial-drive product range.

The smaller models are designed for much lower-power motors, while the 595 A and 900 A configurations are intended for large industrial installations.

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24. High-Power Model Comparison

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25. Application Suitability

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26. Installation Considerations

Because this is a high-power drive, installation planning is particularly important.

Electrical Supply

The incoming electrical system must be compatible with the drive’s voltage class and current requirements.

Motor

The following motor information should be checked:

• Motor voltage
• Motor full-load current
• Motor horsepower
• Motor frequency
• Motor speed
• Motor insulation
• Motor duty
• Motor overload requirements

Cabinet Space

The equipment requires substantially more space than a compact VFD.

Adequate room should be provided for:

• Power cables
• Control wiring
• Ventilation
• Maintenance
• Cooling airflow
• Door access
• Service work

Weight

The final equipment weight in kg should be confirmed before:

• Transportation
• Lifting
• Foundation design
• Floor loading
• Cabinet positioning

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27. Advantages for Pump Applications

For pump applications, the drive can provide:

• Variable flow control
• Adjustable pressure
• Smooth startup
• Smooth stopping
• Reduced hydraulic shock
• Reduced mechanical stress
• Potential energy savings
• Process automation

This makes it particularly useful for large pumping systems where the demand changes throughout the day.

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28. Advantages for Fan Applications

For large fans, variable-speed control can provide:

• Adjustable airflow
• Improved process control
• Reduced throttling
• Smooth startup
• Lower mechanical stress
• Potential energy savings
• Better response to changing ventilation demand

This can be particularly useful in large ventilation systems.

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29. Advantages for Conveyor Applications

For conveyors, the main benefits can include:

• Smooth acceleration
• Controlled stopping
• Adjustable speed
• Reduced belt shock
• Reduced coupling stress
• Improved material handling
• Better synchronization with upstream equipment
• Easier process adjustment

Large conveyors can benefit substantially from controlled acceleration because sudden starting torque can place considerable stress on mechanical components.

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30. Advantages for Heavy Industrial Machinery

For heavy industrial machinery, the main advantages are:

1. High current capacity

   The 595 A rating makes the drive suitable for large motors.

2. Variable-speed operation

   Machine speed can be adjusted according to production requirements.

3. Controlled acceleration

   Large mechanical systems can be started more smoothly.

4. Controlled deceleration

   The machine can be brought to a stop according to a controlled profile.

5. Industrial automation integration

   Drive operating information can be integrated into a larger control system.

6. Flexible application range

   The same drive platform can be used across many different industrial processes.

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31. Detailed Parameter Table

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32. Product Selection Checklist

When selecting or replacing this model, the following information should be collected first:

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33. Overall Assessment

The 20G11LE595JN0NNNNN is a high-power PowerFlex 755 AC drive intended for large industrial motor applications.

Its 595 A output rating places it in a high-capacity class suitable for substantial motors and demanding industrial machinery.

It is particularly well suited to applications where the motor needs more than simple ON/OFF control and where the process requires adjustable speed, controlled acceleration, controlled stopping and integration with an industrial automation system.

Typical applications include large pumps, industrial fans, blowers, conveyors, mining equipment, cement machinery, aggregate handling equipment and large process systems.

The model is also a good candidate for applications where operating conditions vary during the production cycle. Instead of forcing a motor to operate continuously at one fixed speed, the drive can adjust motor speed to better match the actual process requirement.

From a mechanical perspective, this is a large Frame 9-class drive, so installation planning is considerably more important than with a small VFD. Adequate cabinet space, ventilation, cable access, maintenance clearance and lifting arrangements should be considered before installation.

For dimensions and weight in kg, the safest engineering approach is to use the final mechanical configuration rather than relying on a generic number. The complete weight can change with the particular cabinet and option arrangement, and this is especially important for transportation, lifting and floor-loading calculations.

Overall, the 20G11LE595JN0NNNNN is best regarded as a large industrial motor-control solution for high-current, high-power applications, particularly where reliable variable-speed operation and integration into a modern industrial control system are required.