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1. Product Overview

The 20G11LF1K4AN0NNNNN is a high-power industrial variable frequency AC drive designed for controlling large three-phase motors.

It belongs to the PowerFlex 755 family within the PowerFlex 750-Series and is intended for demanding applications where high motor power, accurate speed regulation, controlled acceleration and industrial automation integration are required.

This particular configuration is a 690 VAC, three-phase, 1400 A high-power drive.

Its approximate motor power ratings are:

• 1500 kW Light Duty
• 1400 kW Normal Duty
• 1120 kW Heavy Duty

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

It is appropriate for large pumps, fans, blowers, compressors, conveyors, crushers, mixers and other large rotating machinery.

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

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2. Brand and Product Series

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3. Main Technical Parameters

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4. Electrical Capacity

The defining feature of the 20G11LF1K4AN0NNNNN is its 1400 A current rating.

This is considerably larger than the 1040 A configuration in the same general product family.

The 1400 A capacity makes the drive suitable for extremely large motors and heavy industrial processes.

The drive is designed for a 690 VAC three-phase supply.

For large industrial motors, a higher voltage system can help reduce the current required for a particular motor power level compared with lower-voltage motor systems.

The major duty ratings can be summarized as follows.

The appropriate duty rating should always be selected according to the motor’s actual full-load current, overload requirements, acceleration requirements and load characteristics.

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5. Light-Duty Rating — 1500 kW

The approximate Light-Duty rating is 1500 kW.

This makes the drive suitable for very large motors where the application normally operates with relatively stable loading and does not continuously require severe overload conditions.

Typical applications may include:

• Large centrifugal pumps
• Large ventilation fans
• Large process blowers
• Cooling systems
• Industrial water systems
• Large circulation equipment
• Process machinery

The 1500 kW rating makes this configuration particularly attractive for applications approaching the upper end of the megawatt-class motor range.

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6. Normal-Duty Rating — 1400 kW

The Normal-Duty rating is approximately 1400 kW.

Normal-Duty applications generally have moderate overload requirements.

Typical examples include large industrial process machinery, large pumps, fans, conveyors and other continuously operating equipment.

The actual selection should be based primarily on motor current rather than simply comparing motor kW values.

For a large motor, the nameplate current, voltage, frequency and duty cycle should all be evaluated.

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7. Heavy-Duty Rating — 1120 kW

The Heavy-Duty rating is approximately 1120 kW.

Heavy-Duty operation is relevant to machinery that experiences high starting torque, rapid load changes or substantial mechanical inertia.

Possible applications include:

• Heavy conveyors
• Crushers
• Large mixers
• Mining equipment
• Material-handling equipment
• Process machinery
• High-inertia rotating equipment
• Bulk-material processing systems

The lower Heavy-Duty power rating compared with the Light-Duty rating reflects the increased thermal and overload requirements associated with demanding operating conditions.

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8. Physical Dimensions

The catalog configuration is associated with an 800 mm deep MCC-style enclosure arrangement.

At this power level, the final physical dimensions can depend on the specific equipment arrangement and cabinet configuration.

For this reason, the depth can be stated with confidence, while overall width and height should be treated as configuration-dependent.

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9. Weight

Because this is a large Frame 10 industrial drive, the total physical mass can be significant.

However, the final weight can depend on the actual packaged configuration, enclosure arrangement, options and associated equipment.

It would be inappropriate to provide an exact kilogram value without confirming the precise physical assembly.

For transportation and installation, the actual nameplate or final equipment documentation should be used rather than a generic weight estimate.

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10. Input Configuration

The 20G11LF1K4AN0NNNNN uses an AC input with precharge and DC terminals.

The precharge function is important in a high-power drive because the DC-link capacitors require controlled charging when the drive is energized.

The basic power flow can be represented as:

690 VAC Three-Phase Supply

↓

Input / Precharge Section

↓

Rectifier

↓

DC Link

↓

Inverter Power Section

↓

Variable-Frequency AC Output

↓

Large AC Motor

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

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11. Filtering

The catalog configuration includes a filtered arrangement.

Filtering is useful in high-power power-electronic systems because switching devices generate electrical noise and high-frequency components.

A suitable filtering arrangement can help improve electromagnetic compatibility within the overall installation.

The complete system should still be evaluated as a combination of:

• Drive
• Motor
• Motor cable
• Grounding system
• Incoming power supply
• Cabinet
• Other electrical equipment

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12. CM Jumper Configuration

The catalog configuration specifies the CM jumper as removed.

The common-mode arrangement can be important in installations where grounding, electrical noise, motor insulation and system configuration require particular attention.

The correct arrangement should be selected according to the electrical system and installation requirements.

This is particularly important for large 690 VAC drive systems because leakage current, common-mode voltage and grounding arrangements can have a significant effect on the overall installation.

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13. Product Introduction

The 20G11LF1K4AN0NNNNN is designed to control very large industrial motors with variable-frequency technology.

A conventional motor starter generally provides limited control over motor speed.

A variable frequency drive changes the frequency and voltage supplied to the motor so that the motor can operate over a controlled speed range.

This provides much greater flexibility.

For example, a large pump does not necessarily need to run at full speed throughout the entire production cycle.

A conveyor may need different speeds depending on material flow.

A large fan may need to change speed according to ventilation demand.

A compressor may need to respond to changing process requirements.

A crusher may require controlled acceleration and torque management.

The drive provides the electrical power conversion and control functions needed to operate these large motors.

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14. Main Product Advantages

14.1 Very High Current Capacity

The 1400 A rating is one of the most important characteristics of this model.

It allows the product to control motors that require extremely high current.

This places the drive in a very different category from compact and medium-size variable frequency drives.

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14.2 Megawatt-Class Motor Capability

With a Light-Duty rating of approximately 1500 kW, the drive is designed for very large industrial motor systems.

It can therefore be considered for applications where motor power reaches the megawatt level.

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14.3 690 VAC Operation

The 690 VAC voltage class is particularly useful for large industrial motors.

Higher motor voltage can allow large motors to operate at lower current than equivalent-power motors operating at lower voltage.

This can influence:

• Cable sizing
• Switchgear selection
• Transformer selection
• Motor feeder design
• Electrical distribution

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14.4 Variable-Speed Control

The drive allows the motor speed to be adjusted.

This is especially valuable for processes where the required output changes during operation.

Examples include:

• Pump flow control
• Fan airflow control
• Conveyor speed control
• Compressor capacity control
• Process-machine speed control

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14.5 Controlled Acceleration

Large motors can have substantial inertia.

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

The drive can provide a controlled acceleration profile.

This can help reduce mechanical shock to:

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

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14.6 Industrial Automation Integration

The PowerFlex 755 platform is designed for integration with industrial automation systems.

This makes it suitable for plants where drives, controllers, sensors and supervisory systems need to operate as part of a coordinated process.

Typical drive data includes:

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15. Applications

15.1 Large Pump Systems

Large pumps are one of the most natural applications for a drive of this size.

The drive can regulate motor speed to match the required flow and pressure.

Possible applications include:

• Industrial water pumping
• Cooling-water systems
• Process-water systems
• Wastewater pumping
• Mining dewatering
• Large circulation pumps
• Water transfer systems
• Process pumping

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16. Large Fan and Blower Applications

Large fans and blowers can require hundreds or thousands of kilowatts.

Using a variable frequency drive allows airflow to be adjusted according to actual demand.

Possible applications include:

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

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17. Conveyor Applications

Large conveyors can have very high inertia.

A drive can gradually accelerate the conveyor rather than applying full motor torque immediately.

This can reduce stress on:

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

Possible applications include:

• Mining conveyors
• Ore conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk-material conveyors
• Long-distance conveyors

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18. Mining Applications

The high current rating makes the 20G11LF1K4AN0NNNNN suitable for consideration in large mining operations.

Potential applications include:

• Large ore conveyors
• Crushers
• Mine dewatering pumps
• Ventilation fans
• Material-handling systems
• Mineral-processing machinery
• Bulk-material systems

Mining applications can involve high dust levels, high mechanical loads and demanding operating cycles.

Proper cooling, enclosure selection, environmental protection and maintenance planning are therefore important.

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19. Crusher Applications

Crushers can experience sudden changes in mechanical load.

The motor may require high torque when hard material enters the crushing chamber.

The Heavy-Duty rating of approximately 1120 kW makes this drive a possible candidate for large crushing systems when the actual current and overload requirements are within the drive’s rating.

Potential applications include:

• Primary crushing
• Secondary crushing
• Aggregate processing
• Mineral processing
• Cement processing
• Bulk-material processing

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20. Compressor Applications

Large industrial compressors can require very high motor power.

A variable frequency drive allows the compressor speed to be adjusted according to process demand.

Possible applications include:

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

The compressor’s minimum-speed requirements, torque characteristics and permitted operating range must be considered before final drive selection.

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21. Mixer Applications

Large industrial mixers can have significant starting torque requirements.

This is especially true when the mixer is already loaded.

Controlled acceleration can reduce mechanical stress and help bring the motor smoothly to operating speed.

Possible applications include:

• Chemical processing
• Cement production
• Mineral processing
• Bulk-material mixing
• Industrial process manufacturing

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22. Energy-Saving Potential

One of the principal advantages of variable-speed control is the ability to match motor speed to process requirements.

This can be particularly valuable in centrifugal pump and fan applications.

For a variable-torque load, reducing motor speed can produce a substantial reduction in power consumption.

The actual savings depend on:

• Load characteristics
• Operating hours
• Motor efficiency
• Process requirements
• Existing control method
• Required flow or pressure
• Mechanical efficiency

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23. Cooling System

The drive is air cooled.

At a power rating around 1.5 MW, heat dissipation is an important installation consideration.

The electrical room or cabinet system needs adequate airflow.

Hot exhaust air should not be allowed to circulate back into the drive intake.

Important factors include:

• Ambient temperature
• Airflow
• Ventilation
• Fan condition
• Dust accumulation
• Cabinet arrangement
• Service access
• Cooling-system maintenance

Proper cooling can have a direct impact on equipment reliability and service life.

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24. Installation Requirements

A drive in this power class requires detailed electrical and mechanical planning.

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25. Motor Selection

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

The most important parameters include:

The drive should be sized using the motor’s actual current and application duty rather than simply matching the nominal kW rating.

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26. Five Same-Series or Closely Related Models

The following models are useful candidates for comparison within the same high-power PowerFlex 755 family.

The first three duty ratings in the table represent Light Duty / Normal Duty / Heavy Duty where applicable.

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27. Related Model — 20G11LF1K0AN0NNNNN

The 20G11LF1K0AN0NNNNN is a closely related PowerFlex 755 high-power configuration.

It operates in the 690 VAC and approximately 1040 A class.

This is a lower-current alternative to the 1400 A model.

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28. Related Model — 20G11LF1K0AN2NNNNN

The 20G11LF1K0AN2NNNNN is another closely related high-power configuration.

The principal difference is in the catalog configuration rather than the basic high-power platform.

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29. Related Model — 20G11LF1K4JN0NNNNN

The 20G11LF1K4JN0NNNNN is particularly close to the requested model because it retains the same general 690 VAC / 1400 A high-power class.

This model should be considered when the application requires a similar electrical capacity but a different catalog configuration.

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30. Related Model — 20G11LF1K4JN2NNNNN

The 20G11LF1K4JN2NNNNN is another closely related 1400 A configuration.

It is especially relevant when comparing the option suffixes associated with the same electrical rating.

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31. Related Model — 20G11LF1K5JN2NNNNN

The 20G11LF1K5JN2NNNNN represents a higher-current configuration for applications requiring even greater current capacity.

This type of configuration becomes relevant when the motor current requirement exceeds the 1400 A class.

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32. Five Popular Models from the Same Brand

The following five models represent other commonly used products within the same overall industrial drive portfolio.

They are not direct replacements for the 1400 A high-power model.

They are included because they can be useful when comparing drive sizes for different motor applications.

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33. 25B-D010N104

The 25B-D010N104 is a compact drive intended for much smaller motor applications.

It is not a direct alternative to the 1400 A PowerFlex 755.

Instead, it represents the compact end of the product portfolio.

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34. 25B-D017N104

The 25B-D017N104 is another compact variable frequency drive configuration.

It is suitable for small and medium industrial machinery.

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35. 25B-D027N114

The 25B-D027N114 provides a larger current class within the compact drive family.

It can be used for medium-size machines.

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36. 20F11ND077AA0NNNNN

The 20F11ND077AA0NNNNN belongs to the PowerFlex 753 family.

It is positioned in the medium-to-large industrial drive category.

It is much smaller electrically than the 1400 A model but can be appropriate for medium-size industrial motors.

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37. 20G11LF1K0AN2NNNNN

The 20G11LF1K0AN2NNNNN is the closest option among the five comparison models in terms of overall power class.

It is also part of the PowerFlex 755 family and uses the 690 VAC platform.

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38. High-Power Model Comparison

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39. Application Comparison

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40. Advantages in Large Industrial Systems

The 20G11LF1K4AN0NNNNN is particularly well suited to large installations where motor power and process control are major considerations.

Its main strengths include:

1400 A Current Capacity

The high current rating makes it suitable for very large motors.

1500 kW Light-Duty Capacity

The drive can serve motors in the megawatt range.

1400 kW Normal-Duty Capacity

This provides substantial capacity for continuous industrial operation.

1120 kW Heavy-Duty Capacity

The Heavy-Duty rating makes it suitable for demanding loads when correctly sized.

690 VAC Operation

The voltage class is appropriate for large industrial motor systems.

Variable-Speed Operation

Motor speed can be adjusted to suit process requirements.

Controlled Starting

Large machines can be accelerated gradually.

Industrial Network Integration

The drive can be integrated into a broader automation architecture.

Diagnostic Capability

Operating information can assist maintenance and troubleshooting.

Flexible Applications

The drive can be used across many industries and machine types.

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41. Maintenance Advantages

Large industrial drives represent important production assets.

Unexpected drive failures can cause expensive downtime.

The PowerFlex 755 platform provides operating and diagnostic information that can assist maintenance teams.

Typical maintenance information can include:

• Drive status
• Output current
• Operating frequency
• Motor speed
• Warning conditions
• Fault conditions
• Communication status
• Temperature-related information
• Operating parameters
• Diagnostic information

This can help technicians determine whether a problem is associated with:

• The drive
• Motor
• Mechanical load
• Control system
• Communication system
• Power supply

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42. Typical Industries

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43. Engineering Selection Checklist

Before selecting the 20G11LF1K4AN0NNNNN for a real project, the following information should be confirmed.

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44. Product Positioning

The 20G11LF1K4AN0NNNNN is positioned at the very-high-power end of the PowerFlex 755 product range.

It is not designed for small machinery.

Its intended value comes from its ability to control extremely large motors while providing the flexibility associated with modern variable frequency drive technology.

Compared with a compact drive, it provides dramatically greater current and power capacity.

Compared with a smaller industrial drive, it is intended for applications where motor current can reach the 1400 A class.

For applications around the megawatt level, this type of drive provides a practical platform for variable-speed motor control.

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45. Key Specification Summary

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46. Overall Product Assessment

The 20G11LF1K4AN0NNNNN is a high-capacity variable frequency drive intended for large industrial motor systems.

Its 690 VAC input, 1400 A current rating, 1500 kW Light-Duty rating, 1400 kW Normal-Duty rating and 1120 kW Heavy-Duty rating place it firmly in the megawatt-class industrial drive category.

Its strongest applications are large pumps, fans, blowers, conveyors, compressors, crushers, mixers and other high-power rotating machinery.

The product is particularly useful when a large motor needs more than simple start/stop control.

Variable-frequency operation allows the motor speed to follow the actual process requirement.

For pumping and ventilation applications, this can provide improved process control and potentially lower energy consumption.

For conveyors, crushers and mixers, controlled acceleration can help reduce mechanical stress.

For continuous industrial processes, network integration and diagnostic functions can simplify centralized control and maintenance.

The 800 mm depth is an important mechanical consideration for electrical-room planning.

Because the overall width, height and total mass can depend on the actual packaged configuration, the final weight in kg should be confirmed from the physical assembly before transportation, lifting, foundation design or cabinet installation.

In summary, the 20G11LF1K4AN0NNNNN is best viewed as a very-high-power, 690 VAC, 1400 A PowerFlex 755 variable frequency drive for large industrial motors, with particular value in applications requiring high power, variable-speed operation, controlled acceleration, industrial automation integration and reliable process control.