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20G11LC1K5JN4NNNNN — Detailed Product Introduction, Technical Parameters, Applications, Advantages and Related Models

The 20G11LC1K5JN4NNNNN is a high-power AC variable frequency drive designed for large three-phase motor applications. It belongs to the PowerFlex 755 product family and is intended for demanding industrial equipment where accurate motor-speed control, high current capacity, reliable operation and automation-system integration are required.

The information below is organized for technical product description, equipment selection, engineering reference and product catalog use. Where a precise dimensional or weight value depends on the final mechanical configuration, it is marked accordingly rather than using an uncertain estimated value.

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1. Basic Product Information

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2. Product Introduction

The 20G11LC1K5JN4NNNNN is a large-capacity industrial variable frequency drive designed to regulate the speed, torque and operating characteristics of large AC motors.

With a rated output current of approximately 1,480 A and a normal-duty rating of approximately 850 kW, this model is intended for large industrial machinery rather than general-purpose small motor applications.

The drive converts incoming AC electrical power into a controlled output suitable for operating a three-phase AC motor.

By controlling motor frequency and voltage, the drive allows the motor to operate according to the actual requirements of the production process.

This is especially useful for equipment such as large pumps, fans, blowers, conveyors, cooling systems and other high-power rotating machinery.

Instead of simply starting and stopping a large motor, the drive can provide controlled acceleration, controlled deceleration, adjustable speed and process-oriented operation.

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3. Brand and Product Series

The PowerFlex 755 series is designed for applications requiring more than simple motor starting.

It is suitable for systems in which motor speed, torque, acceleration, process control, diagnostics and network communication are important parts of the overall machine or plant.

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4. Main Electrical Parameters

The 1,480 A current rating is one of the most important characteristics of this model.

For engineering selection, however, the motor nameplate current should always be considered together with the required duty class and actual mechanical load.

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5. Normal-Duty and Heavy-Duty Ratings

The model provides two important application ratings.

The 850 kW normal-duty rating is appropriate as the main reference for applications with relatively moderate overload requirements.

The 710 kW heavy-duty rating should be considered when the motor is subject to demanding torque conditions, repeated acceleration, high inertia or other operating conditions that place greater stress on the drive.

This distinction is important because selecting a drive only according to the motor’s nominal kW can result in an unsuitable configuration when the actual mechanical load is demanding.

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6. Mechanical Specifications

The 800 mm depth is an important figure when preparing an electrical-room layout or cabinet arrangement.

The complete width and height should be taken from the mechanical drawing for the exact configured unit.

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7. Dimensions and Weight

Because this is a large high-current drive, the mechanical arrangement can be substantially different from smaller PowerFlex drives.

For that reason, it is not advisable to provide a guessed weight as an exact product specification.

For equipment-room structural calculations, transportation planning and lifting arrangements, the final configured unit’s mechanical documentation should be used.

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8. Cooling System

The drive uses forced-air cooling.

A high-current drive generates significant heat during operation, so the cooling system is an important part of the installation.

A suitable installation should provide adequate:

• Air circulation
• Ventilation
• Heat dissipation
• Cabinet clearance
• Cooling-fan operation
• Air passage cleanliness
• Ambient-temperature control

Dust, blocked ventilation paths and excessive ambient temperature can increase thermal stress on power components.

For a large industrial installation, cooling should therefore be considered during the initial cabinet and equipment-room design rather than treated as a secondary issue.

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9. Input Configuration

The model uses an AC input with precharge configuration.

The precharge function is important in high-power electrical equipment because it helps manage the initial charging of the DC-link system when the drive is energized.

The drive also includes DC terminals as part of this configuration.

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10. Filtering and CM Jumper Configuration

The catalog configuration uses filtered operation with the CM jumper installed.

This configuration is relevant to the drive’s electrical-noise and common-mode characteristics.

In an industrial plant, proper filtering and grounding can be important because large variable frequency drives operate with high-frequency switching.

The installation should therefore pay attention to:

• Motor cable routing
• Grounding
• Shielding
• Control wiring separation
• Communication wiring
• Cabinet bonding
• Motor-frame grounding

Correct installation practices can help reduce unwanted electrical interference and communication problems.

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11. Communication Capability

The PowerFlex 755 platform can be integrated into an industrial automation architecture using EtherNet/IP communication.

This makes the drive suitable for systems where the motor is controlled as part of a larger automation process.

Typical information that can be exchanged includes:

For a large production system, this type of communication can reduce the need for separate hardwired signals for every operating parameter.

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12. Product Applications

12.1 Large Water Pumps

One of the most suitable application categories is large-scale pumping.

Possible applications include:

• Industrial water pumps
• Cooling-water pumps
• Process-water pumps
• Water-transfer systems
• Wastewater pumping
• Circulation systems
• Utility water systems

Variable-speed control allows pump operation to be adjusted according to flow and pressure requirements.

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12.2 Cooling Systems

Large industrial plants often use high-power motors for cooling equipment.

Potential applications include:

• Cooling-water circulation
• Cooling towers
• Heat-exchanger systems
• Industrial cooling loops
• Process cooling
• Utility cooling

The drive can adjust motor speed according to the thermal load.

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12.3 Large Industrial Fans

Large fans can consume significant electrical power when operating continuously.

Applications can include:

• Industrial ventilation
• Exhaust systems
• Furnace ventilation
• Combustion-air systems
• Process ventilation
• Cooling fans
• Dust-control systems

Variable-speed control can allow the airflow to better match the actual production requirement.

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12.4 Large Blowers

High-power blowers are commonly found in process industries.

Possible applications include:

• Aeration
• Process-air supply
• Dust collection
• Combustion systems
• Industrial ventilation
• Air-handling systems

The drive provides adjustable-speed control for these large motor loads.

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12.5 Conveyor Systems

The model is also applicable to large conveyor systems.

Potential uses include:

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

Controlled acceleration is particularly valuable for large conveyor systems because sudden motor acceleration can place considerable stress on belts, couplings, gearboxes and mechanical structures.

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13. Mining Applications

Large mining facilities often use high-power motors for material handling, ventilation and water management.

The drive can be considered for applications such as:

• Long conveyors
• Dewatering pumps
• Large ventilation fans
• Material-handling systems
• Process equipment
• Auxiliary machinery

For mining applications, environmental conditions should be carefully considered, particularly dust, temperature, vibration and cabinet protection.

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14. Cement Industry Applications

Cement production uses numerous high-power motors.

Possible applications include:

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

The ability to regulate motor speed can help coordinate equipment operation with production demand.

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15. Aggregate and Bulk-Material Applications

The drive can also be considered for large equipment used in aggregate and bulk-material processing.

Examples include:

• Crushers’ auxiliary systems
• Conveyors
• Large fans
• Pumps
• Screening-related equipment
• Material-handling machinery
• Dust-control equipment

The exact drive selection should be based on the motor current, torque requirement and operating cycle.

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16. Main Product Advantages

16.1 High Current Capacity

The 1,480 A rating makes this model suitable for very large AC motors.

This is particularly valuable when the motor cannot be served economically by several smaller drives.

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16.2 High Power Capability

The drive supports approximately:

• 850 kW normal duty
• 710 kW heavy duty

This places it in a high-power industrial category.

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16.3 Adjustable Motor Speed

The drive allows the motor’s speed to be adjusted according to process requirements.

This can be useful for:

• Flow control
• Pressure control
• Airflow control
• Conveyor speed
• Production rate
• Cooling requirements

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16.4 Controlled Acceleration

Large motors can generate substantial mechanical stress during starting.

Controlled acceleration allows the motor to reach its operating speed progressively.

This can reduce sudden mechanical loading on:

• Shafts
• Couplings
• Gearboxes
• Conveyor belts
• Pumps
• Fans
• Bearings

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16.5 Controlled Deceleration

Controlled deceleration can provide a smoother stopping process.

This is particularly useful when the driven equipment has significant rotational inertia.

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16.6 Industrial Network Integration

EtherNet/IP communication allows the drive to become part of the larger automation system.

This makes centralized control and monitoring easier.

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16.7 Suitable for Large Industrial Equipment

The high-current Frame 9 configuration is intended for substantial industrial installations.

It is much better suited to large process equipment than compact machine-level drives.

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17. Application Advantages

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18. Five Same-Series or Closely Related Models

The following models are useful for comparison within the same PowerFlex 755 family and nearby capacity range.

These models are useful when selecting a drive based on the actual motor current.

The K4 configuration is slightly lower in capacity than the requested K5 model.

The K5 configuration provides the 1,480 A / 850 kW normal-duty class.

The K6 configuration moves into a higher current range.

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19. Five Additional Related PowerFlex Models

These related configurations provide a practical range for equipment selection.

For replacement projects, it is important to compare not only the nominal kW rating but also voltage, current, enclosure arrangement, braking configuration, filtering configuration and communication requirements.

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20. Five Representative Popular Models from the Same Brand

The following are representative models from the same brand that are useful when comparing different motor-control requirements.

The term “popular” here is used in the practical sense of representative models frequently considered within this product range, rather than as a specific sales ranking.

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21. Comparison of Closely Related Models

This comparison shows that the requested model sits toward the upper end of the K-series capacity range.

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22. Product Configuration Interpretation

The catalog number contains multiple characters that define the drive’s electrical and mechanical configuration.

For the requested model:

20G11LC1K5JN4NNNNN

the important characteristics represented by the configuration include the PowerFlex 755 family, 400 V class, high-current rating, air-cooled packaged-drive construction, filtering arrangement and other factory configuration details.

The exact meaning of every individual catalog-code position should be checked against the applicable catalog-number structure when ordering replacement equipment, because a seemingly small character change can affect enclosure, filtering, braking or other configuration characteristics.

This is especially important when replacing an existing drive.

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23. Installation Considerations

A drive of this size requires careful planning before installation.

Electrical Installation

The incoming supply must be appropriately rated for the drive and application.

The motor feeder, protection equipment, disconnect equipment, grounding system and associated components must be selected according to the actual installation requirements.

Mechanical Installation

The 800 mm depth should be included in cabinet and electrical-room planning.

Adequate clearance should be provided for installation, inspection and maintenance.

Cooling

Forced-air cooling requires an unobstructed airflow path.

The equipment should not be installed where hot air from another major power device is directly circulated into its cooling intake.

Motor Cabling

Large motor cables should be routed and grounded appropriately.

Cable length, insulation system, grounding and electromagnetic compatibility should be considered during engineering.

Communication

If EtherNet/IP is used, network architecture and cable routing should be planned together with the electrical installation.

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24. Maintenance Recommendations

Large drives should be incorporated into a preventive-maintenance program.

A recurring warning or fault should not simply be reset repeatedly without identifying the underlying cause.

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25. Advantages for Pump Applications

For pump applications, the most important advantage is the ability to vary motor speed.

A pump does not necessarily need to operate at full speed throughout the entire production cycle.

When demand decreases, reducing motor speed can allow the pumping system to operate closer to the required process point.

This can also make the process easier to control.

Typical control variables include:

• Flow
• Pressure
• Tank level
• Process demand
• Cooling load
• Water circulation

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26. Advantages for Fan Applications

For large fans, variable-speed control can provide much more flexibility than fixed-speed operation.

The drive can allow the fan to operate at a speed appropriate to the actual airflow requirement.

Typical applications include:

• Exhaust
• Ventilation
• Furnace air
• Cooling
• Dust extraction
• Process air

This is particularly useful in industrial plants where ventilation requirements vary throughout the production cycle.

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27. Advantages for Conveyor Applications

Conveyor systems can benefit from controlled acceleration and deceleration.

Large conveyors often contain substantial mechanical inertia.

Starting a large conveyor abruptly can place stress on:

• Belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Mechanical structures

A variable frequency drive provides a more controlled operating profile.

It can also allow the conveyor speed to be coordinated with upstream and downstream machinery.

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28. Advantages for Automated Production Lines

The integration of the drive into an industrial network provides another major advantage.

The drive can become part of a coordinated automation system rather than functioning as an isolated motor controller.

This can allow:

• Centralized start/stop control
• Speed reference control
• Status monitoring
• Fault monitoring
• Production coordination
• Maintenance diagnostics
• Process data collection

This is particularly valuable for large factories with centralized PLC and HMI systems.

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29. Recommended Selection Procedure

When selecting the 20G11LC1K5JN4NNNNN or a related model, the following sequence is recommended.

The most important point is that the drive should be selected according to the motor current and actual load profile, not simply by comparing motor horsepower or kW.

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30. Overall Product Evaluation

The 20G11LC1K5JN4NNNNN is a high-capacity PowerFlex 755 AC drive for demanding industrial motor-control applications.

Its 400 V AC input, 1,480 A current rating, 850 kW normal-duty rating, 710 kW heavy-duty rating, Frame 9 construction, forced-air cooling and 800 mm depth place it in the large industrial-drive category.

It is particularly appropriate for large rotating machinery where variable-speed operation is required.

The most suitable applications include large pumps, industrial fans, blowers, conveyors, cooling equipment, water-treatment equipment, mining machinery, cement equipment and bulk-material handling.

One of its strongest practical advantages is that it allows a very large motor to be integrated into an automated process rather than being operated simply as a fixed-speed motor.

For pump and fan systems, this can provide better process control.

For conveyor systems, controlled acceleration and deceleration can provide smoother mechanical operation.

For automated plants, network communication can simplify the exchange of control commands, operating status and diagnostic information.

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31. Final Technical Summary

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32. Short Product Description for Catalog or Website Use

The 20G11LC1K5JN4NNNNN is a high-power PowerFlex 755 AC variable frequency drive designed for large three-phase motor applications. It operates in the 400 V AC class and provides a rated current of approximately 1,480 A, with an 850 kW normal-duty rating and a 710 kW heavy-duty rating.

The drive uses forced-air cooling and an 800 mm-depth MCC-style mechanical configuration. It features AC input with precharge, DC terminals, filtered configuration with CM jumper installed, no dynamic braking and EtherNet/IP communication.

It is suitable for large pumps, fans, blowers, conveyors, cooling systems, water-treatment equipment, mining machinery, cement equipment and other industrial applications requiring high-capacity variable-speed motor control.

The combination of high current capacity, adjustable motor speed, controlled acceleration and deceleration, industrial communication and high-power construction makes this model particularly suitable for large automated production systems.

For exact cabinet width, height and product weight in kg, the final configured unit should be checked against its specific mechanical documentation rather than relying on a generic estimate.