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1. Product Overview

The 20G11LF590JN2NNNNN is a high-power PowerFlex 755 AC packaged drive designed for large three-phase industrial motors.

It is an air-cooled, 690 VAC, 590 A variable frequency drive intended for demanding industrial applications where precise motor-speed control, controlled acceleration and reliable process operation are required.

The drive is configured as an 800 mm deep MCC-style unit, with a Type 1 / IP20 construction, AC input with precharge, DC terminals, input filtering and an installed common-mode capacitor jumper.

The model also incorporates embedded EtherNet/IP communication, making it suitable for integration into an industrial automation and supervisory-control system.

The 590 A current class places this drive well into the large industrial-motor category. It is suitable for applications such as large pumps, fans, blowers, conveyors, compressors, mixers, crushers, material-handling equipment, mining machinery and other large process machines.

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2. Brand and Product Series

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3. Model Identification

The complete catalog number is:

20G11LF590JN2NNNNN

This complete model number identifies a particular factory configuration rather than simply identifying the general PowerFlex 755 family.

The important electrical portion is LF590, which corresponds to the 690 VAC / 590 A class.

The remaining catalog characters identify configuration details such as the packaged-drive arrangement, enclosure, operator-interface arrangement and other factory options.

For purchasing, replacement and maintenance work, the complete catalog number 20G11LF590JN2NNNNN should be retained.

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4. Main Technical Parameters

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5. Electrical Rating

The most important electrical characteristic of the 20G11LF590JN2NNNNN is its 590 A output-current rating.

This is a large-frame drive intended for high-power motors.

The corresponding duty ratings are:

These ratings are important because the same motor-drive application can have very different requirements depending on the load profile.

A centrifugal fan, for example, normally behaves differently from a crusher or heavily loaded conveyor.

For that reason, the drive should be selected using the motor’s actual full-load current and the application’s overload requirements rather than relying only on motor horsepower or kilowatt values.

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6. 690 VAC Input

The drive is designed for a 690 VAC three-phase industrial electrical system.

This voltage class is commonly used with large industrial motors.

Large motors can require substantial electrical current, and the 690 VAC class provides an appropriate voltage platform for high-power motor systems.

The electrical system should be checked for:

• Nominal supply voltage
• Voltage tolerance
• Three-phase configuration
• Supply frequency
• Short-circuit conditions
• Transformer capacity
• Protective-device coordination
• Grounding arrangement
• Motor voltage
• Motor full-load current

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7. 590 A Output Current

The 590 A output-current capacity is a key feature of this model.

It allows the drive to operate large industrial motors where smaller variable frequency drives would not provide sufficient current capacity.

The actual motor size that can be connected depends on:

• Motor voltage
• Motor efficiency
• Motor power factor
• Motor rated current
• Duty cycle
• Overload requirement
• Speed range
• Starting torque
• Operating temperature
• Altitude

The motor nameplate current should therefore always be checked before final selection.

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8. Light-Duty Rating — 630 kW

The approximate 630 kW Light-Duty rating is appropriate for applications where the motor load is relatively smooth and the overload requirement is comparatively moderate.

Typical applications include:

• Large centrifugal pumps
• Large fans
• Large ventilation blowers
• Cooling-water systems
• Circulation pumps
• Industrial air-handling equipment

These applications can often operate with relatively predictable torque characteristics.

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9. Normal-Duty Rating — 560 kW

The approximate 560 kW Normal-Duty rating is intended for applications with more variable loading.

Typical examples include:

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

Normal-duty operation provides a useful middle ground between light-duty and heavy-duty applications.

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10. Heavy-Duty Rating — 450 kW

The approximate 450 kW Heavy-Duty rating is intended for applications where the motor experiences higher torque demand or more demanding overload conditions.

Typical examples include:

• Crushers
• Heavy conveyors
• Large mixers
• Mining equipment
• High-inertia machinery
• Bulk-material handling systems
• Heavy process machinery

The motor’s actual current and overload requirements should be compared with the drive’s heavy-duty rating.

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11. Cooling System

The 20G11LF590JN2NNNNN uses forced-air cooling.

At this power level, thermal management is extremely important.

The drive’s power semiconductor devices and other electrical components generate heat during normal operation.

The cooling system removes this heat from the drive enclosure.

Good installation practice should provide sufficient:

• Cooling airflow
• Cabinet ventilation
• Air intake
• Exhaust path
• Maintenance access
• Temperature control

Dust and contamination should also be controlled.

Restricted airflow can increase operating temperature and can negatively affect long-term reliability.

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12. Physical Dimensions

One of the clearly defined mechanical characteristics of this configuration is its 800 mm depth.

The complete width and height should be taken from the final mechanical configuration rather than estimated.

This is particularly important when the drive is being installed into an MCC lineup or a custom electrical cabinet.

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13. Weight

For a drive of this size, the physical weight can vary according to the exact packaged configuration.

The appropriate value for engineering, transportation and lifting should therefore be taken from the final configured assembly documentation.

It would be misleading to provide an invented fixed kilogram value when the exact packaged configuration has not been physically specified.

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14. Input Configuration

The drive uses an AC input with precharge.

The general power path can be understood as:

690 VAC Three-Phase Supply

↓

AC Input

↓

Precharge Circuit

↓

Rectifier

↓

DC Link

↓

Inverter

↓

Variable-Frequency AC Output

↓

Three-Phase Motor

This architecture allows the drive to transform fixed-frequency AC electrical power into controlled variable-frequency motor power.

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15. Precharge Function

Precharge is particularly important on a high-power drive.

The drive’s DC-link capacitors need to be charged during startup.

If the capacitors were connected directly to the supply without appropriate control, the initial charging current could be extremely high.

The precharge system manages this startup process.

This is an important part of the power architecture of a large industrial AC drive.

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16. DC Terminals

The configuration includes DC terminals.

DC terminals can provide additional flexibility for certain system architectures.

Potential uses include:

• Common DC bus systems
• Multi-drive systems
• Shared DC-link arrangements
• Special energy-management configurations

The actual DC-bus arrangement must be designed according to the complete system architecture and applicable electrical requirements.

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17. Input Filtering

The model is configured as filtered.

Input filtering helps control electrical noise associated with power-electronic switching.

This can be useful in industrial environments containing:

• PLC systems
• Instrumentation
• Sensors
• Communication equipment
• Control networks
• Other variable frequency drives

Good grounding, cable routing and shielding practices remain important even when filtering is provided.

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18. CM Jumper Installed

The catalog configuration specifies:

CM Jumper Installed

The common-mode configuration influences the behavior of high-frequency common-mode currents within the drive system.

This is relevant to:

• Grounding
• Motor cable design
• Electrical noise
• EMC behavior
• Motor insulation stress

The factory configuration should be maintained unless the electrical system design specifically requires a different arrangement.

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19. Dynamic Braking

The specified configuration has:

Dynamic Braking: None

This should be considered carefully when the drive is used with high-inertia loads.

During deceleration, mechanical energy can be returned to the DC bus.

Applications with frequent or rapid stopping may require a dedicated braking solution.

Examples include:

• High-inertia conveyors
• Centrifuges
• Large rotating machinery
• Rapid-cycle machines
• Heavy material-handling equipment
• Certain high-speed fans

The deceleration profile should therefore be evaluated during application engineering.

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20. Door-Mounted HIM

This particular configuration includes a door-mounted HIM, or Human Interface Module.

A door-mounted operator interface is useful because it allows operators and maintenance personnel to interact with the drive without necessarily opening the enclosure.

Typical functions include:

• Drive status monitoring
• Speed reference adjustment
• Fault indication
• Parameter access
• Diagnostic information
• Local control
• Fault reset

This is particularly convenient for large industrial installations.

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21. Embedded EtherNet/IP

Embedded EtherNet/IP communication allows the drive to communicate with the plant automation system.

Typical information exchanged can include:

This makes the drive suitable for modern automated production systems.

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22. Product Introduction

The main purpose of the 20G11LF590JN2NNNNN is to provide controlled electrical power to a large AC motor.

A traditional fixed-speed motor system generally operates according to the frequency of the electrical supply.

A variable frequency drive adds another layer of control.

The drive can adjust the electrical frequency supplied to the motor and therefore control motor speed.

This makes it possible to match motor operation more closely to the actual process requirements.

For example:

A pump can slow down when less flow is required.

A fan can reduce speed when less airflow is needed.

A conveyor can accelerate gradually.

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

A compressor can adjust its operating speed according to process requirements.

This flexibility is one of the main reasons high-power variable frequency drives are widely used in industrial automation.

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23. Main Product Advantages

23.1 High Current Capacity

The 590 A output rating allows the drive to control large industrial motors.

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23.2 High Power Capacity

The drive provides substantial power capability across three duty classifications.

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23.3 690 VAC Compatibility

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

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23.4 Variable-Speed Operation

The drive can adjust motor speed to match the process.

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23.5 Controlled Acceleration

Gradual acceleration can reduce mechanical shock on:

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

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23.6 Process Regulation

Motor speed can be used as a control variable for:

• Flow
• Pressure
• Airflow
• Production speed
• Conveyor speed
• Mixing
• Material handling

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23.7 Industrial Communication

Embedded EtherNet/IP makes the drive suitable for networked automation.

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23.8 Operator Interface

The door-mounted HIM provides convenient local access to drive information and operating functions.

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23.9 High-Power Industrial Design

The PowerFlex 755 platform is designed for demanding industrial motor applications.

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24. Pump Applications

Large pumps are one of the most suitable applications for this type of drive.

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

When process demand changes, motor speed can be adjusted accordingly.

Potential applications include:

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

Potential benefits include:

• Better flow control
• Better pressure regulation
• Smooth starting
• Reduced mechanical stress
• Reduced throttling
• Potential energy savings

Actual energy savings depend on the complete pumping system.

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25. Fan and Blower Applications

Large fans and blowers can consume substantial amounts of electrical energy.

Operating a fan at full speed when full airflow is not required can result in unnecessary energy consumption.

A variable frequency drive can reduce the motor speed to match airflow demand.

Typical applications include:

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

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26. Conveyor Applications

Large conveyors often contain significant mechanical inertia.

Starting a large conveyor suddenly can produce substantial mechanical stress.

The drive can provide controlled acceleration.

Potential benefits include:

• Reduced belt shock
• Reduced gearbox stress
• Smoother startup
• Adjustable conveyor speed
• Better material control
• Improved process synchronization

Typical applications include:

• Mining
• Cement
• Aggregate
• Bulk material handling
• Ore processing
• Industrial manufacturing

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27. Crusher Applications

Crushers can produce substantial and rapidly changing mechanical loads.

The heavy-duty rating of approximately 450 kW makes this drive suitable for appropriately sized crusher applications where the motor current and overload requirements remain within the drive’s capabilities.

Crusher applications should be evaluated carefully because the required starting and overload performance can be significantly greater than that of a centrifugal pump.

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28. Compressor Applications

Large compressors can require considerable motor power.

A variable frequency drive can allow motor speed to respond to changing process requirements.

Possible applications include:

• Industrial compressed-air systems
• Process compressors
• Manufacturing plants
• Large pneumatic systems
• Process industries

The compressor manufacturer’s torque requirements should be checked before selecting the drive duty rating.

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29. Mixer Applications

Large industrial mixers can require high starting torque.

The torque demand can also change considerably depending on the material being processed.

Variable-speed operation can provide:

• Controlled starting
• Adjustable mixing speed
• Reduced mechanical shock
• Improved process control
• Better production flexibility

Potential applications include:

• Cement
• Chemical processing
• Mineral processing
• Bulk-material processing
• General manufacturing

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30. Mining Applications

The combination of high voltage and high current makes this type of drive particularly relevant to large mining equipment.

Potential applications include:

Mining environments can be harsh, so dust, ventilation, temperature and mechanical vibration must be considered carefully.

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31. Cement and Aggregate Applications

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

Typical equipment includes:

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

The 20G11LF590JN2NNNNN is particularly relevant where the motor voltage, current and duty requirements correspond to its 690 VAC / 590 A rating.

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32. Water and Wastewater Applications

Large water-treatment installations often contain high-power pumps.

Possible applications include:

• Raw-water pumping
• Water transfer
• Process-water circulation
• Wastewater pumping
• Cooling-water systems
• Large ventilation equipment

Variable-speed operation can allow pump output to be matched more closely to actual system demand.

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33. Energy-Saving Potential

One of the major reasons for using variable-speed drives on pumps and fans is the possibility of reducing energy consumption.

A pump or fan that does not need to operate at maximum output can often be operated at a reduced speed.

The actual savings depend on:

• Load profile
• Pump or fan characteristics
• System resistance
• Operating hours
• Process requirements
• Control strategy

The drive itself does not guarantee a particular energy saving.

The savings result from matching motor operation to the actual process requirement.

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34. Motor Compatibility

Before installing the drive, the motor should be checked carefully.

The motor full-load current is particularly important when working with a 590 A drive.

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35. Installation Parameters

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36. Maintenance

Regular maintenance is important for a high-power air-cooled drive.

Typical inspection points include:

Cooling Fans

Inspect cooling fans for abnormal noise, contamination and reduced airflow.

Air Passages

Make sure ventilation openings are not blocked.

Power Connections

Inspect electrical connections according to the appropriate maintenance procedure.

Motor Cables

Inspect cables, terminals and grounding connections.

Cabinet

Check for dust, moisture and contamination.

Drive Temperature

Monitor unusual temperature increases.

Fault History

Review faults and warnings to identify developing problems.

Network Communication

Check the communication status between the drive and control system.

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37. Mechanical Installation

Because this is an 800 mm deep MCC-style drive, the physical layout should be planned before installation.

The design should consider:

• Drive depth
• Cabinet width
• Cabinet height
• Cable bending radius
• Incoming power cables
• Motor cables
• Control cables
• Network cables
• Cooling airflow
• Door opening
• Maintenance access
• Lifting access
• Transportation route
• Floor loading

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

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38. Environmental Considerations

The drive is intended for an appropriate industrial environment.

Good environmental control can significantly improve equipment reliability.

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39. Five Same-Series or Closely Related Models

The following models are useful when comparing products within the same high-power PowerFlex 755 range.

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40. Related Model: 20G11LF590JN0NNNNN

The 20G11LF590JN0NNNNN is one of the closest related configurations.

It is particularly useful as a comparison when the same 590 A electrical capacity is required but the factory configuration differs.

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41. Related Model: 20G11LF590JN4NNNNN

This model belongs to the same 590 A electrical class and is useful when comparing different factory configurations.

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42. Related Model: 20G11LF650JN2NNNNN

The 20G11LF650JN2NNNNN provides a higher current capacity than the 590 A model.

This is a sensible comparison when the motor current is approaching the upper practical range of the 590 A version.

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43. Related Model: 20G11LF710JN2NNNNN

The 20G11LF710JN2NNNNN provides another step up in current capacity.

This model can be considered where additional current capacity is required.

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44. Related Model: 20G11LF765JN2NNNNN

The 20G11LF765JN2NNNNN is a higher-current member of the same general high-power range.

It is more appropriate for motors requiring greater current capacity than the 590 A version.

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45. Comparison of Same-Series Models

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46. Five Popular Models Under the Same Brand

The following five models cover different power levels and applications. They should not be considered direct replacements for the 590 A model.

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47. 25B-D010N104

The 25B-D010N104 is a compact variable frequency drive designed for substantially smaller motors than the 20G11LF590JN2NNNNN.

Its compact construction makes it suitable for smaller motor-control applications.

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48. 25B-D017N104

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

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49. 25B-D027N114

The 25B-D027N114 is another compact-drive option for a higher-current motor application.

This model is much smaller than the 590 A high-power drive and is intended for a completely different motor-size range.

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50. 20F11ND077AA0NNNNN

The 20F11ND077AA0NNNNN belongs to the PowerFlex 753 family.

It is intended for medium-power industrial motor applications.

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51. 20G11LF650JN2NNNNN

The 20G11LF650JN2NNNNN is the closest higher-current alternative in this comparison.

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52. Application Comparison

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53. Benefits for Large Pump Systems

For a large pump, the drive can provide much more than simply starting and stopping the motor.

The motor speed can be adjusted according to the required process flow.

This can reduce the need for mechanical throttling and can improve overall process control.

Important advantages include:

• Adjustable flow
• Adjustable pressure
• Smooth starting
• Reduced starting shock
• Improved process response
• Potential energy savings
• Reduced mechanical stress

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54. Benefits for Large Fan Systems

For large industrial fans, controlling motor speed can provide a direct method of controlling airflow.

Potential benefits include:

• Adjustable airflow
• Smooth startup
• Reduced mechanical stress
• Better process control
• Reduced unnecessary full-speed operation
• Potential reduction in energy consumption

This can be useful in ventilation, furnace, cooling and exhaust systems.

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55. Benefits for Conveyor Systems

A large conveyor can have a considerable amount of mechanical inertia.

The drive can provide controlled acceleration rather than applying full motor torque immediately.

Potential advantages include:

• Reduced belt shock
• Reduced gearbox stress
• Reduced coupling stress
• Smooth startup
• Adjustable operating speed
• Improved production control

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56. Benefits for Mining Equipment

Mining equipment frequently operates under demanding conditions.

Large motors are commonly used for:

• Crushers
• Conveyors
• Fans
• Pumps
• Material-handling equipment

A high-power variable frequency drive can provide controlled motor operation while allowing the motor to respond to process requirements.

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57. Benefits for Industrial Automation

The embedded communication capability makes the drive suitable for integration into a broader control system.

For example, a central control system can provide a speed reference to the drive.

The drive can then return operating information such as:

• Motor speed
• Current
• Frequency
• Status
• Warnings
• Faults
• Diagnostic information

This creates a two-way flow of information between the motor-control equipment and the automation system.

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58. Maintenance Advantages

A properly configured industrial drive can simplify troubleshooting by providing operational and diagnostic information.

Maintenance personnel can monitor:

• Fault conditions
• Warning conditions
• Drive status
• Motor current
• Operating frequency
• Speed
• Communication status

This can help identify problems before they become major production interruptions.

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59. Important Selection Considerations

When considering the 20G11LF590JN2NNNNN, the following points should be checked.

Motor Voltage

The motor must be compatible with the drive’s voltage class.

Motor Current

The motor full-load current must be within the drive’s applicable current rating.

Duty Rating

The application should be classified as light, normal or heavy duty.

Load Type

Pump, fan, conveyor and crusher loads can have very different torque characteristics.

Acceleration

Large motors and high-inertia loads require careful acceleration planning.

Deceleration

Applications requiring rapid stopping should be evaluated for braking requirements.

Environment

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

Physical Dimensions

The 800 mm depth must be considered in the mechanical layout.

Weight

The final configured equipment weight must be confirmed before transportation and lifting.

Communication

The control system should be checked for the required EtherNet/IP communication architecture.

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60. Complete Technical Summary

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61. Overall Evaluation

The 20G11LF590JN2NNNNN is a high-power variable frequency drive intended for large industrial motor applications.

Its combination of 690 VAC operation, 590 A output capacity, air cooling, DC terminals, filtering, common-mode configuration and embedded EtherNet/IP communication makes it suitable for large-scale industrial automation systems.

The three main power ratings give the model flexibility:

630 kW for Light Duty

560 kW for Normal Duty

450 kW for Heavy Duty

The model is particularly well suited to large pumps, fans, blowers, conveyors, water systems, mining machinery, cement equipment and other large industrial process equipment.

The 800 mm depth is an important mechanical specification for cabinet and MCC planning.

The width, height and final Weight (kg) should be confirmed against the exact configured assembly rather than estimated from the catalog number.

For applications involving high-inertia loads, rapid stopping or heavy cyclic loading, braking and overload requirements should be evaluated carefully.

For pump and fan applications, variable-speed operation can provide better process control and may offer significant energy-saving potential when the process allows the motor to operate below full speed.

For conveyor, crusher and other heavy machinery, the appropriate duty rating should be selected according to the actual motor current, torque requirements and overload profile.

Among closely related models, the 590 A versions are the most direct comparisons. The 650 A, 710 A and 765 A versions provide progressively greater current capacity for larger motor requirements.

Overall, the 20G11LF590JN2NNNNN is best characterized as a 690 VAC, 590 A, air-cooled, high-power PowerFlex 755 AC packaged drive for large three-phase industrial motor control, variable-speed operation and networked industrial automation.