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20G11LC2K1AN0NNNNN — Detailed Product Information, Technical Parameters, Applications, Advantages and Related Models

1. Product Overview

The 20G11LC2K1AN0NNNNN is a high-power PowerFlex 755 AC drive designed for large three-phase industrial motor applications.

It is a large-frame, air-cooled variable frequency drive intended for applications where motor power, starting requirements, process control and continuous-duty performance are considerably higher than those of ordinary low- and medium-power drives.

The configuration is associated with a 400 VAC class input, a very high current capacity of approximately 2,150 A, and power ratings in the megawatt range. It is therefore aimed at large industrial equipment such as pumps, fans, blowers, conveyors, compressors and other heavy rotating machinery.

The product uses an AC input with precharge, provides DC-bus access, uses forced-air cooling, and is configured as an 800 mm deep MCC-style drive.

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2. Basic Product Information

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3. Brand and Product Series

The PowerFlex 755 series is designed for demanding industrial motor-control applications.

Compared with a basic-purpose variable frequency drive, this product family is intended for more complex installations where motor control, process coordination, feedback, diagnostics, communication and high-power operation are important.

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4. Detailed Electrical Parameters

The 2,150 A current rating is the key characteristic of this particular configuration.

At this current level, the drive is intended for very large motors and large industrial power systems.

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5. Power Rating

The model provides three different duty classifications.

These three values should not be interpreted as three different motors that can simply be connected without further consideration.

The appropriate rating depends on the actual load profile.

A centrifugal pump or fan may operate primarily under a variable-torque load.

A conveyor or heavy process machine may require significantly greater overload capability and may therefore need to be evaluated against the heavy-duty rating.

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6. Light-Duty Rating — Approximately 1,400 kW

The approximately 1,400 kW light-duty rating places this drive in the very-high-power category.

Typical variable-torque applications can include:

• Large centrifugal pumps
• Large industrial fans
• Cooling-water systems
• Large ventilation equipment
• High-capacity blowers
• Water-transfer systems
• Industrial circulation systems

For equipment with variable flow requirements, adjustable-speed operation can provide better process flexibility than fixed-speed operation.

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7. Normal-Duty Rating — Approximately 1,250 kW

The approximately 1,250 kW normal-duty rating is suitable for very large industrial motor applications where the operating load is substantial but does not require the full heavy-duty characteristics of the application.

Potential applications include:

• Large pumps
• Process fans
• Large blowers
• Conveyors
• Material-handling systems
• Industrial cooling equipment
• Process machinery

The motor’s actual nameplate current remains one of the most important selection parameters.

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8. Heavy-Duty Rating — Approximately 1,000 kW

The approximately 1,000 kW heavy-duty rating is particularly important for applications with higher torque or more demanding operating conditions.

Typical examples include:

• Heavy conveyors
• High-inertia machines
• Constant-torque equipment
• Material-handling systems
• Large mechanical process equipment
• Equipment requiring frequent acceleration
• Equipment requiring substantial starting torque

For these applications, the heavy-duty current and overload requirements should be checked carefully.

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9. Product Introduction

The 20G11LC2K1AN0NNNNN is essentially a high-power electronic interface between an industrial electrical supply and a large AC motor.

Instead of allowing the motor to operate only at a fixed electrical frequency, the drive provides controlled motor operation.

The output frequency and voltage can be controlled so that the motor can operate at different speeds according to process requirements.

For large industrial systems, this can be extremely useful.

A large pump may need different flow rates during different production stages.

A large fan may require different airflow depending on process conditions.

A conveyor may need a controlled acceleration profile to reduce mechanical shock.

A blower may need its speed adjusted according to actual air demand.

The drive provides the control platform required for these types of applications.

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10. Main Product Functions

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11. Communication and Automation

The configuration includes embedded EtherNet/IP.

This allows the drive to participate in an industrial automation network.

Typical control and monitoring information can include:

For a large industrial installation, network communication can make the drive easier to integrate into centralized automation and supervisory systems.

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12. Main Applications

12.1 Large Pump Systems

Large pumps are one of the most important application categories for this type of drive.

Typical applications include:

• Industrial water pumping
• Cooling-water circulation
• Process-water pumping
• Wastewater systems
• Water-transfer systems
• Utility pumping
• Large process pumps

Variable-speed control allows pump speed to be adjusted according to the required flow and pressure.

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12.2 Large Industrial Fans

The drive can also be considered for very large fan systems.

Typical applications include:

• Factory ventilation
• Process exhaust
• Furnace ventilation
• Cooling systems
• Large air-handling systems
• Combustion-air systems
• Industrial dust-control systems

Instead of keeping the fan at maximum speed continuously, the operating speed can be adjusted according to airflow requirements.

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12.3 Large Blowers

Large blowers can require very substantial motor power.

Possible applications include:

• Process air
• Aeration
• Industrial ventilation
• Combustion air
• Dust collection
• Air supply
• Process gas movement

The drive’s large current capacity makes it suitable for consideration in very large blower installations.

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12.4 Heavy-Duty Conveyors

Large conveyors can have substantial mechanical inertia.

A controlled acceleration profile can reduce the mechanical shock that occurs when a large motor and conveyor system are started.

Potential applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk-material conveyors
• Port handling systems
• Heavy material-handling equipment

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12.5 Mining Equipment

Mining applications often involve large motors and demanding operating environments.

Possible applications include:

• Long conveyors
• Mine dewatering pumps
• Large ventilation fans
• Material-handling machinery
• Processing equipment
• Large auxiliary machines

For mining applications, environmental conditions such as dust, temperature, altitude and vibration need to be considered separately.

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12.6 Cement and Aggregate Equipment

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

Potential applications include:

• Process fans
• Conveyors
• Blowers
• Pumps
• Cooling equipment
• Material-handling systems
• Large ventilation equipment

The drive can provide controlled speed and acceleration for large rotating machinery.

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13. Main Product Advantages

13.1 Very High Current Capacity

The approximately 2,150 A rating is the most obvious advantage of this configuration.

It places the product in a class intended for extremely large AC motors.

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13.2 Megawatt-Class Motor Capability

The drive provides approximately:

• 1,400 kW light duty
• 1,250 kW normal duty
• 1,000 kW heavy duty

This gives it considerable capacity for large industrial applications.

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13.3 Variable-Speed Operation

The motor can operate at different speeds according to the process requirement.

This is especially useful for:

• Pumps
• Fans
• Blowers
• Conveyors
• Process equipment

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13.4 Controlled Starting

Large motors can create substantial electrical and mechanical stress during starting.

A variable frequency drive provides controlled acceleration rather than relying on a simple uncontrolled start.

This can help reduce mechanical shock.

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13.5 Controlled Stopping

The drive can also control the motor’s deceleration.

This is useful when large rotating equipment must be stopped in a predictable manner.

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13.6 Industrial Network Integration

Embedded EtherNet/IP makes the drive suitable for integration into an automated control system.

The drive can exchange operating information and control commands with other equipment.

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13.7 High-Power Industrial Design

The large-frame construction and 800 mm deep MCC-style configuration are intended for substantial industrial installations.

This makes the product better suited to large electrical rooms and industrial motor-control systems than compact machine-mounted drives.

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14. Mechanical Dimensions

The configuration is identified with an 800 mm deep MCC-style mechanical arrangement.

The depth is therefore a useful installation reference.

Because large packaged drives can be configured as multi-section equipment, the exact overall height and width should be taken from the final mechanical arrangement rather than estimated.

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15. Weight

The weight requires special attention.

A product in this power class can have a substantially different shipping weight depending on the final cabinet arrangement, installed components and packaging.

Therefore, the following values should be treated as engineering-selection information rather than assumed shipping figures.

For transportation, crane selection, floor loading and structural calculations, the final configured unit’s certified mechanical data should be used.

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16. Complete Technical Parameter Table

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17. Five Same-Series or Closely Related Models

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

The 20G11LC2K1 group is particularly useful when comparing different configuration options around the same electrical capacity.

The final characters in the catalog number can represent different configuration options, so apparently similar catalog numbers should not automatically be treated as identical replacements.

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18. Five Additional Related PowerFlex 755 Models

These models are useful when comparing different motor-current requirements and voltage classes.

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19. Five Representative Popular Models of the Same Brand

For a broader comparison, the following catalog numbers represent commonly encountered industrial drive configurations at different power levels.

These are comparison candidates rather than automatic replacement parts.

A replacement must match the motor voltage, motor current, duty rating, enclosure, cooling arrangement, braking requirements, feedback requirements and control configuration.

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20. Comparison With the 1,590 A Class

The main difference is the significantly higher current and power capacity of the K1 configuration.

This makes the 20G11LC2K1 configuration more appropriate when the motor current requirement is beyond the capability of the lower-current configuration.

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21. Why the 2,150 A Rating Matters

At this power level, motor current becomes a major engineering consideration.

The current rating affects:

• Incoming electrical equipment
• Motor cable sizing
• Protective devices
• Busbar design
• Cabinet design
• Thermal management
• Short-circuit considerations
• Motor connection design
• Power distribution
• Installation cost

A 2,150 A drive is therefore normally part of a substantial electrical installation rather than a small standalone machine.

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22. Pump Applications

For large pump installations, the drive can provide:

• Adjustable flow
• Adjustable pressure
• Controlled startup
• Controlled shutdown
• Process-based speed control
• Remote control
• Network monitoring
• Motor protection functions

This can be particularly useful in systems where water demand changes during operation.

Examples include:

• Cooling-water circulation
• Industrial water systems
• Process-water systems
• Wastewater treatment
• Water-transfer systems
• Large utility pumping

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23. Fan Applications

Large industrial fans often do not need maximum airflow all the time.

A variable frequency drive can allow the fan motor speed to follow the actual demand.

Typical applications include:

• Furnace exhaust
• Process ventilation
• Factory ventilation
• Cooling systems
• Combustion air
• Dust extraction
• Large air-handling systems

The result is a more flexible operating system than a simple fixed-speed arrangement.

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24. Conveyor Applications

Large conveyors can be mechanically demanding during startup.

Controlled acceleration can help reduce sudden torque transfer through the mechanical drivetrain.

Important mechanical components include:

• Conveyor belt
• Gearbox
• Coupling
• Drive pulley
• Shaft
• Bearings

The drive can therefore be an important part of the overall conveyor-control strategy.

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25. Mining Applications

For mining equipment, high motor capacity is often essential.

The drive can be considered for:

• Long conveyors
• Large pumps
• Ventilation systems
• Material-handling systems
• Processing equipment
• Crushing-related auxiliary machinery

The actual suitability of the drive depends on the motor torque profile and environmental requirements.

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26. Cement Applications

Cement plants contain many large rotating machines.

Potential applications include:

• Large process fans
• Conveyors
• Blowers
• Pumps
• Cooling systems
• Material-handling equipment
• Ventilation systems

The high power capacity of this drive makes it suitable for evaluation in large cement-production equipment.

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27. Product Advantages Summary

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28. Installation Considerations

Because this is a very high-power drive, installation planning should include both electrical and mechanical factors.

The electrical design should consider:

• Incoming voltage
• Available fault current
• Protective equipment
• Cable sizing
• Grounding
• Motor cable length
• Motor insulation
• Harmonic performance
• Disconnect requirements
• Electrical clearances

The mechanical design should consider:

• Cabinet dimensions
• Floor loading
• Ventilation
• Heat dissipation
• Access for maintenance
• Lifting points
• Transportation route
• Service clearance
• Ambient temperature

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29. Motor Matching

The motor should be checked against the drive using actual nameplate information.

The motor nameplate current should take priority over simply comparing horsepower or kilowatt values.

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30. Cooling and Environmental Requirements

The product uses forced-air cooling.

For a drive of this size, cooling is not a minor consideration.

The installation should provide suitable airflow and prevent hot air from circulating back into the drive’s cooling path.

Important considerations include:

• Ambient temperature
• Dust
• Humidity
• Altitude
• Ventilation
• Cabinet arrangement
• Fan condition
• Airflow restriction
• Heat generated by adjacent equipment

A poorly ventilated installation can reduce equipment reliability.

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31. Maintenance

For very large production systems, preventive maintenance can be particularly valuable because an unexpected drive failure may interrupt an entire production process.

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32. Selection Recommendations

If the application is a large centrifugal pump, the light-duty or normal-duty rating may be the primary reference depending on the actual operating profile.

If the application is a large fan, variable-torque characteristics should be evaluated carefully.

If the application is a heavy conveyor, the heavy-duty rating and starting torque requirements deserve particular attention.

If the application is a high-inertia machine, acceleration and deceleration requirements should be checked before final selection.

If the application is a replacement project, the existing motor nameplate, existing drive configuration, cabinet dimensions, cable arrangement, communication architecture and installed options should all be compared.

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33. Final Specification Summary

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34. Overall Product Assessment

The 20G11LC2K1AN0NNNNN is a very high-capacity PowerFlex 755 AC drive designed for large industrial motor systems.

Its most important characteristics are the approximately 2,150 A current rating, 400 VAC class input, and megawatt-level duty ratings of approximately 1,400 kW light duty, 1,250 kW normal duty and 1,000 kW heavy duty.

This makes the model particularly appropriate for large pumps, fans, blowers, conveyors, mining machinery, cement equipment, water-treatment systems, cooling systems and other major rotating industrial equipment.

The 800 mm deep MCC-style mechanical arrangement should be considered during cabinet planning, transportation and installation.

Because this is a large-frame product, the exact overall width, height and weight can depend on the final configured equipment. For that reason, the weight in kg is intentionally shown as “To Be Confirmed” rather than using an unreliable estimated number.

For model replacement, the most important points to compare are input voltage, motor nameplate current, duty rating, overload requirement, torque requirement, acceleration/deceleration requirements, enclosure, cooling, communication, braking configuration and physical dimensions.

The closest comparisons are the other LC1K4, LC1K5, LC1K6 and LC2K1 configurations. The requested LC2K1 version sits in the higher-current portion of the PowerFlex 755 range and is intended for applications requiring substantially more capacity than the approximately 1,500–1,600 A class configurations.