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PowerFlex 755 AC Packaged Drive – 20G11JC1K2JN4NNNNN

1. Product Overview

The 20G11JC1K2JN4NNNNN is a high-power air-cooled AC drive from the PowerFlex 755 series.

It is designed for large three-phase AC motor applications where precise speed control, controlled acceleration and deceleration, high output current, industrial networking, and integration with a larger automation system are required.

This is not a compact machine-level inverter. It is a large industrial packaged drive intended for substantial motor loads and centralized electrical installations.

The configuration represented by 20G11JC1K2JN4NNNNN is a Frame 9, 400 VAC, three-phase, 1,175 A class packaged drive with an MCC-style cabinet, forced-air cooling, Type 12/IP54 enclosure, embedded EtherNet/IP, AC input with precharge, DC terminals, filtering and a door-mounted operator interface.

The drive is especially suitable for large pumps, fans, blowers, conveyors, water-treatment equipment, mining machinery, material-handling systems, cement equipment and other large rotating machines.

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2. Product Identification

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3. Brand

The product belongs to the Allen-Bradley PowerFlex product range.

For identification purposes, the product hierarchy can be understood as:

Allen-Bradley → PowerFlex → PowerFlex 755 → 20G11JC1K2JN4NNNNN

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4. Product Series – PowerFlex 755

The PowerFlex 755 series is a high-performance industrial AC drive platform intended for demanding motor-control applications.

Compared with smaller compact drives, the PowerFlex 755 family provides considerably more flexibility for large industrial machines.

The series can be used with different motor-control strategies and can be integrated into industrial control architectures through networking, I/O and optional feedback or control modules.

The platform is suitable for applications where the motor cannot simply run continuously at one fixed speed.

Instead, the drive allows the motor speed to be adjusted according to process requirements.

For example, a large pump may only need 70% speed during part-load conditions.

A large ventilation fan may need different speeds depending on plant airflow requirements.

A conveyor may require controlled acceleration to prevent excessive mechanical shock.

A process machine may require a carefully controlled speed profile.

The PowerFlex 755 is designed around these types of requirements.

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5. Main Electrical Parameters

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6. 1,175 A Output Capacity

The most important electrical characteristic of this model is its 1,175 A output-current rating.

This is a very high current rating and places the drive firmly in the large industrial-drive category.

The current rating is especially important when matching the drive to a motor.

Motor selection should not be based only on the motor’s kW rating.

The following information should also be checked:

• Motor rated voltage.
• Motor full-load current.
• Motor service factor.
• Required overload.
• Starting torque.
• Continuous torque.
• Acceleration time.
• Deceleration time.
• Motor operating speed.
• Load inertia.
• Ambient conditions.

For large industrial motors, the motor nameplate current is one of the most important values to compare against the drive rating.

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7. Power Ratings

The model has three important duty ratings.

These ratings are important because different industrial loads require different levels of overload capability.

A large centrifugal fan generally has a smoother load characteristic than a heavy conveyor.

A pump may have relatively predictable torque requirements.

A material-handling machine may experience substantial torque during acceleration.

Therefore, the appropriate drive rating depends on the actual application rather than simply selecting the largest motor kW number that appears in the catalog.

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8. Light-Duty Operation – 800 kW

The Light-Duty rating is approximately:

800 kW

This makes the drive particularly suitable for large machines with relatively smooth load characteristics.

Typical examples include:

• Large centrifugal fans.
• Industrial ventilation.
• Large pumps.
• Cooling-water pumps.
• Process blowers.
• Air-handling systems.
• Large circulation systems.

For these applications, the drive can regulate motor speed according to actual process demand.

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9. Normal-Duty Operation – 710 kW

The Normal-Duty rating is:

710 kW

This provides a lower power rating than the Light-Duty value because the expected operating conditions can be more demanding.

Normal-Duty selection should be based on the motor’s actual current and the machine’s load characteristics.

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10. Heavy-Duty Operation – 560 kW

The Heavy-Duty rating is:

560 kW

Heavy-Duty applications can place greater demands on the motor and drive during acceleration, loading and transient operating conditions.

Examples can include:

• Heavy conveyors.
• Material-handling machinery.
• Industrial processing equipment.
• Large mechanical systems.
• High-inertia loads.

When selecting Heavy Duty, the required overload profile should always be considered.

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11. Input Power

The model is designed for:

The 400 VAC three-phase configuration makes this model appropriate for industrial power systems using the corresponding low-voltage three-phase supply class.

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12. AC Input with Precharge

The drive uses an AC input with precharge arrangement.

Precharge is particularly important in a high-power drive because the DC bus contains large capacitive components.

When the drive is energized, these components cannot simply be connected to the incoming supply without managing the initial charging current.

The precharge system helps control this initial energization process.

This becomes increasingly important as drive power increases.

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13. Cooling System

The product uses:

Forced-Air Cooling

High-power semiconductor devices generate substantial heat during operation.

The cooling system therefore becomes an important part of the overall drive installation.

The electrical room or drive cabinet area should provide suitable environmental conditions and sufficient airflow.

Particular attention should be given to:

• Cooling fans.
• Air passages.
• Cabinet ventilation.
• Ambient temperature.
• Dust accumulation.
• Obstructions.
• Filter condition where applicable.

A high-power drive should not be installed in a location where cooling airflow is restricted.

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14. Enclosure

The model configuration uses a:

Type 12 / IP54 Industrial Enclosure

This enclosure arrangement is appropriate for many indoor industrial installations.

It provides a higher level of environmental protection than an open-frame drive.

It is particularly useful for electrical rooms, industrial control areas and machinery installations where dust and incidental moisture may be present.

However, enclosure protection should always be considered together with the actual environmental conditions.

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15. Cabinet Construction

The model uses an:

MCC-Style Cabinet

This is a significant difference compared with compact standalone drives.

The cabinet-style construction provides room for high-power electrical components, power connections, cooling equipment, control equipment and operator-interface components.

It also makes the product more appropriate for centralized industrial electrical installations.

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16. Cabinet Depth

The specified cabinet depth is:

800 mm

This dimension should be considered during electrical-room planning.

In addition to the cabinet depth itself, sufficient clearance must be provided for:

• Door opening.
• Maintenance.
• Cable installation.
• Power connections.
• Control wiring.
• Cooling airflow.
• Inspection.
• Component replacement.

The exact cabinet width and height can depend on the complete configuration.

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17. Dimensions

Because this is a large packaged Frame 9 drive, it is not appropriate to treat the dimensions as though it were a small wall-mounted inverter.

The known cabinet depth is:

800 mm

The overall height and width should be treated as configuration-dependent unless the exact mechanical drawing for the supplied configuration is available.

This distinction is important because a large packaged drive may contain different cabinet arrangements depending on the exact ordering configuration.

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18. Weight

The weight should be treated as a mechanical engineering parameter rather than an approximate marketing specification.

This is a very large packaged drive.

The exact weight can change according to:

• Cabinet arrangement.
• Installed options.
• Internal power components.
• Operator-interface configuration.
• Packaging.
• Shipping configuration.

For that reason, the safest technical description is:

Weight: configuration-dependent; obtain the final shipping/mechanical weight from the equipment documentation before lifting or transportation.

This approach avoids giving a potentially incorrect weight value for a specific cabinet build.

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19. Embedded EtherNet/IP

The configuration includes:

Embedded EtherNet/IP

This makes the drive suitable for integration into an industrial automation network.

The network can be used for information such as:

• Start/stop commands.
• Speed reference.
• Drive status.
• Output frequency.
• Output current.
• Fault information.
• Warning information.
• Motor operating data.
• Drive diagnostics.
• Parameter information.

This is particularly valuable in plants where many drives are controlled from a central automation system.

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20. Human Interface

The configuration includes a door-mounted operator interface.

A local interface is useful during commissioning, troubleshooting and maintenance.

Typical tasks include:

• Viewing drive status.
• Checking faults.
• Checking warnings.
• Monitoring motor current.
• Monitoring output frequency.
• Adjusting parameters.
• Performing commissioning.
• Checking operating conditions.

For a large industrial drive installed inside an electrical room, local access can significantly simplify maintenance.

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21. Dynamic Braking

The configuration specifies:

Dynamic Braking: None

This is an important point when considering the application.

When a large motor decelerates, the mechanical energy stored in the rotating load can return toward the drive.

If the machine requires rapid deceleration, the system designer needs to determine how this energy will be handled.

Applications requiring special attention include:

• High-inertia fans.
• Large centrifuges.
• Heavy conveyors.
• Rapid stopping machinery.
• Large rotating process equipment.

The absence of dynamic braking in this configuration does not mean the drive cannot control deceleration.

It means the particular catalog configuration does not include the specified dynamic-braking arrangement.

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22. Filtering

The configuration is:

Filtered

Filtering can be useful for installations where electrical noise and electromagnetic compatibility are important.

This can be particularly relevant where the drive is installed near:

• PLC systems.
• Measurement instruments.
• Sensors.
• Communication equipment.
• Other variable-frequency drives.
• Process-control equipment.
• Industrial computers.

Correct grounding and cable routing remain important even when filtering is included.

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23. CM Jumper

The configuration specifies:

CM Jumper Installed

This setting influences the common-mode electrical characteristics of the drive.

It should be considered together with:

• Grounding system.
• Motor cable type.
• Cable length.
• Motor insulation.
• Installation topology.
• Electrical environment.

For large drives, these details can have a significant effect on system behavior.

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24. Typical Applications

Large Pump Systems

The drive is well suited to large pump applications.

Examples include:

• Water-transfer pumps.
• Cooling-water pumps.
• Process pumps.
• Industrial circulation pumps.
• Wastewater pumps.
• Mining pumps.
• Utility pumps.

Variable-speed control allows the pump to operate closer to actual process requirements.

This can reduce unnecessary operation at full speed.

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Large Fan Systems

Large industrial fans are another strong application.

Typical examples include:

• Furnace fans.
• Exhaust fans.
• Mine ventilation.
• Dust-extraction fans.
• Process ventilation.
• Cooling fans.
• Industrial air-handling systems.

Fan systems often benefit significantly from variable-speed operation because the required airflow can change during production.

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Large Blowers

The drive can also be applied to large blowers.

Typical applications include:

• Aeration.
• Process air.
• Combustion air.
• Pneumatic conveying.
• Industrial gas circulation.
• Wastewater treatment.

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Heavy Conveyor Systems

Large conveyors can benefit from controlled motor acceleration.

Instead of immediately applying full motor torque, the drive can provide a controlled speed ramp.

This can help reduce:

• Mechanical shock.
• Belt stress.
• Gearbox stress.
• Coupling stress.
• Product movement problems.

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25. Mining Applications

The high current and power capability make this type of drive relevant to large mining installations.

Potential applications include:

• Ore conveyors.
• Mine ventilation.
• Water pumping.
• Material handling.
• Processing systems.
• Auxiliary rotating equipment.

Mining installations often involve large motors operating for long periods, making motor control and thermal management important.

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26. Cement Applications

Potential applications include:

• Large process fans.
• Conveyors.
• Dust-extraction systems.
• Blowers.
• Pumps.
• Material-handling equipment.

Variable-speed control can help the equipment respond to changing production conditions.

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27. Water and Wastewater Applications

Typical applications include:

• Large intake pumps.
• Water-transfer systems.
• Distribution pumps.
• Wastewater pumps.
• Aeration blowers.
• Process-water systems.

The ability to change motor speed can be useful where water flow or pressure requirements vary throughout the day.

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28. Main Product Advantages

High Current Capacity

The 1,175 A current rating allows the product to control very large motors.

This is one of its strongest characteristics.

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High Power Capability

The drive provides an 800 kW Light-Duty rating.

This places it in a category intended for major industrial machinery.

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Multiple Duty Ratings

The combination of:

• 800 kW LD
• 710 kW ND
• 560 kW HD

allows the same basic drive platform to be considered for different types of industrial loads.

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Controlled Motor Starting

The drive can gradually accelerate a motor rather than simply applying full-speed operation immediately.

This can help reduce mechanical shock.

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Adjustable Speed

Motor speed can be adjusted according to process requirements.

This is useful for pumps, fans, conveyors and many other rotating machines.

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Industrial Communication

Embedded EtherNet/IP makes the drive suitable for integration into a plant-wide automation architecture.

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Large Cabinet Construction

The MCC-style Frame 9 construction is appropriate for high-power electrical installations.

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Local Operation

The door-mounted operator interface provides convenient access during commissioning and maintenance.

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Industrial Enclosure

The Type 12/IP54 configuration provides a practical enclosure solution for many indoor industrial environments.

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29. Five Same-Series or Closely Related Models

The following models are useful comparison candidates from the PowerFlex 755 packaged-drive family.

Because the catalog number contains multiple option characters, the exact electrical and mechanical configuration must be checked before treating any model as a direct substitute.

For these related catalog numbers, the exact current, motor-power rating, dimensions and weight should not be inferred solely from the model number.

The safest engineering practice is to match the exact catalog number against the motor nameplate and the intended cabinet configuration.

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30. Detailed Comparison of the Closely Related Models

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31. Five Popular Models from the Same Brand

For users who want alternatives across a broader range of motor sizes, the following are useful models to compare.

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32. PowerFlex 525 – 25B-D6P0N104

The 25B-D6P0N104 represents a much smaller drive category.

It is intended for applications where the motor power requirement is far below the 1,175 A level of the 20G11JC1K2JN4NNNNN.

Typical applications include conveyors, small pumps, fans, machine tools and general-purpose machinery.

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33. PowerFlex 525 – 25B-D017N104

This is another compact-drive option.

This type of drive is more suitable for smaller motors than the 20G11JC1K2JN4NNNNN.

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34. PowerFlex 525 – 25B-D024N114

The 25B-D024N114 belongs to the same compact PowerFlex 525 family.

This model is useful where the motor is considerably smaller and a large cabinet drive would be unnecessary.

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35. PowerFlex 753 – 20F11ND034AA0NNNNN

The PowerFlex 753 family occupies a different position in the product range.

It is aimed at industrial applications where more advanced control and integration are required than with basic compact drives.

Typical applications include:

• Pumps.
• Fans.
• Conveyors.
• Processing machines.
• Industrial material handling.

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36. Why the 20G11JC1K2JN4NNNNN Is Different

The biggest difference is scale.

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37. Application Advantages

Energy Management

Variable-speed control allows the motor to operate closer to the actual process requirement.

This can be especially useful for centrifugal pumps and fans.

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Reduced Mechanical Shock

Controlled acceleration can reduce sudden torque application.

This can benefit:

• Gearboxes.
• Couplings.
• Belts.
• Conveyor systems.
• Pumps.
• Fans.
• Rotating machinery.

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Better Process Control

The drive can provide a variable-speed reference rather than simply switching the motor between ON and OFF.

This can improve process stability.

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Centralized Control

EtherNet/IP integration allows the drive to become part of a larger automated control system.

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Diagnostics

The drive architecture provides access to operating information, warnings and fault conditions.

This can make troubleshooting easier than with a simple motor starter.

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38. Typical Industrial Equipment

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39. Installation Requirements

Because this is a large packaged drive, installation planning should be performed before delivery.

The installation area should have enough room for the complete cabinet and required service clearances.

Particular attention should be given to:

• Floor loading.
• Cabinet access.
• Door movement.
• Cable entry.
• Motor cable routing.
• Input power routing.
• Grounding.
• Cooling airflow.
• Maintenance access.
• Lifting access.
• Transportation route.

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40. Floor and Transportation Considerations

A drive of this size should not be handled like a small electrical component.

Before installation, it is advisable to verify:

The actual shipping weight should be taken from the final equipment documentation rather than estimated from the catalog number.

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41. Environmental Requirements

The following environmental factors should be considered.

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42. Maintenance

A large industrial drive should normally be included in a preventive-maintenance program.

Recommended inspection areas include:

Cooling System

Check cooling fans, airflow and accumulated dust.

Power Connections

Inspect for loose connections, abnormal heating or discoloration.

Control Wiring

Check terminal connections and signs of mechanical damage.

Motor Cable

Inspect cable connections, insulation and grounding.

Operator Interface

Check the display and local controls.

Fault History

Repeated faults should be investigated rather than simply reset.

Cabinet Condition

Keep the cabinet clean and ensure that airflow is not obstructed.

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43. Selection Advice

When choosing the 20G11JC1K2JN4NNNNN for a particular motor, the following five points are especially important.

1. Motor Current

The motor’s rated current should be compared with the drive’s applicable current rating.

2. Duty Classification

Determine whether the machine requires Light Duty, Normal Duty or Heavy Duty.

3. Acceleration

Check whether the motor needs rapid or slow acceleration.

4. Deceleration

Determine whether the machine requires special braking.

5. Mechanical Load

Consider inertia, torque characteristics, speed range and operating cycle.

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44. Main Technical Specification Table

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45. Recommended Model Comparison

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46. Five Broader Brand Recommendations

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47. Overall Advantages of the 20G11JC1K2JN4NNNNN

The 20G11JC1K2JN4NNNNN is particularly attractive when a project requires a combination of high motor power, large output current, industrial networking and cabinet-level construction.

Its key advantages can be summarized as follows:

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48. Conclusion

The 20G11JC1K2JN4NNNNN is a large-capacity PowerFlex 755 AC packaged drive intended for demanding industrial motor-control applications.

Its 1,175 A output rating, combined with 800 kW Light-Duty, 710 kW Normal-Duty and 560 kW Heavy-Duty power ratings, places it in the high-power industrial category.

The 400 VAC three-phase input, Frame 9 construction, forced-air cooling, MCC-style 800 mm-deep cabinet, Type 12/IP54 enclosure and embedded EtherNet/IP make it particularly suitable for large industrial systems.

The strongest application areas are large pumps, fans, blowers, conveyors, mining machinery, water-treatment equipment, cement machinery, material-handling equipment and other high-power rotating machines.

For product selection, the most important point is not simply the motor’s kW rating.

The final selection should consider motor current, voltage, duty classification, overload requirement, starting torque, acceleration, deceleration, braking requirements, environmental conditions, cabinet space and installation requirements.

For the dimensions and weight, the exact final values should be treated as configuration-dependent. The 800 mm cabinet depth is a useful fixed mechanical reference for this configuration, while the final height, width and weight in kg should be taken from the mechanical/shipping documentation for the actual supplied cabinet.

The related PowerFlex 755 catalog numbers listed above are useful candidates for comparison, but their option suffixes can change electrical, enclosure, interface and mechanical characteristics. They should therefore be checked against the intended motor and application before being considered replacements.

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