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Allen-Bradley 20G11JC1K4JN4NNNNN PowerFlex 755 AC Packaged Drive

1. Product Overview

The Allen-Bradley 20G11JC1K4JN4NNNNN is a high-power PowerFlex 755 AC Packaged Drive designed for demanding industrial motor-control applications. It is an air-cooled, cabinet-style variable frequency drive intended for large three-phase AC motors where high output power, reliable speed regulation, flexible motor-control functions and industrial network integration are required.

This model belongs to the PowerFlex 750-Series, specifically the PowerFlex 755 product family. It is a large-frame, high-current configuration intended for applications substantially beyond the range of compact standalone variable frequency drives.

The unit is configured for a 400 V AC, three-phase input and has a rated current of approximately 1,465 A. Its published normal-duty rating reaches approximately 800 kW, while the heavy-duty rating is approximately 630 kW.

The product uses an 800 mm deep MCC-style enclosure configuration, air cooling and a Type 12 / IP54-class enclosure arrangement. It is therefore particularly suitable for centralized industrial electrical rooms, motor-control centers and large machinery installations where cabinet-mounted equipment is preferred.

The model is also associated with an integrated EtherNet/IP-based control architecture and supports multiple control, feedback, communication and I/O options. This makes it suitable not only for basic motor-speed regulation but also for larger automation systems requiring drive diagnostics, coordinated motion and supervisory control.

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2. Brand and Product Series

Item	Information
Brand	Allen-Bradley
Product family	PowerFlex
Product series	PowerFlex 750-Series
Specific series	PowerFlex 755
Product type	AC Variable Frequency Drive / AC Drive
Product configuration	Packaged Drive
Cooling method	Air cooled
Installation style	Cabinet / MCC-style
Model	20G11JC1K4JN4NNNNN
Input voltage	400 V AC
Input phase	3-phase
Rated current	1,465 A
Normal-duty power	800 kW
Heavy-duty power	630 kW
Enclosure style	Type 12 / IP54-class configuration
Cabinet depth	800 mm
Frame	Frame 9
Dynamic braking	None
Input configuration	AC input with precharge
Filtering	Filtered
CM jumper	Installed
Cooling	Forced-air / air cooled
Network capability	EtherNet/IP
Human interface	LCD HIM configuration
Main application	High-power industrial motor control

The key point is that 20G11JC1K4JN4NNNNN is not a small cabinet drive or general-purpose compact inverter. It is a very large industrial drive package intended for high-power motors and centralized industrial power-control systems.

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3. Detailed Technical Parameters

Parameter	20G11JC1K4JN4NNNNN
Model	20G11JC1K4JN4NNNNN
Product name	PowerFlex 755 AC Packaged Drive
Brand	Allen-Bradley
Series	PowerFlex 755
Product family	PowerFlex 750-Series
Drive type	AC variable frequency drive
Cooling	Air cooled
Input voltage	400 V AC
Input frequency	50/60 Hz industrial AC supply
Input phase	3-phase
Rated current	1,465 A
Normal-duty rating	800 kW
Heavy-duty rating	630 kW
Low-duty / light-duty rating	Approximately 850 kW class, depending on application and rating convention
Enclosure	Type 12 / IP54-class
Cabinet configuration	MCC-style
Cabinet depth	800 mm
Frame size	Frame 9
Dynamic braking	None
Input arrangement	AC input with precharge
Input filtering	Filtered
CM jumper	Installed
Human interface	Door-mounted LCD HIM
HIM enclosure capability	IP66 / NEMA Type 4X/12 style configuration
Network	Embedded EtherNet/IP
Control methods	V/Hz, sensorless vector, vector control and FORCE technology
Motor compatibility	Large industrial AC motors
Feedback options	Supported through option modules
I/O expansion	Supported
Safety options	Supported through compatible option modules
Communication expansion	Supported through option modules
Auxiliary power	24 V DC auxiliary power capability
Option slots	Up to five option slots
Cooling arrangement	Forced-air cabinet cooling
Installation environment	Industrial electrical rooms / MCC areas
Approximate cabinet dimensions	2200 × 800 × 800 mm class
Dimension orientation	H × W × D
Approximate weight	Approximately 1,000 kg class, configuration-dependent
Weight unit	kg
Mounting	Floor-standing cabinet
Application class	High-power industrial drive
Braking configuration	No dynamic braking included in this model
Lifecycle classification	Active configuration

Important dimensional and weight note: because this is a large packaged cabinet rather than a small standalone drive module, the final shipping dimensions and actual installed weight can vary with enclosure construction, options, incoming/outgoing cable arrangements, HIM configuration, cabinet accessories and project-specific packaging. For equipment-room structural calculations, lifting plans and transportation, the final dimensional drawing and shipping documentation for the exact build should be treated as the controlling values.

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4. Product Model Interpretation

The catalog number 20G11JC1K4JN4NNNNN contains a large amount of configuration information. It is not simply a random serial number; different portions of the catalog number identify the electrical rating, enclosure arrangement, cooling arrangement, input configuration and other factory-selected options.

The important practical characteristics represented by this configuration are the PowerFlex 755 platform, air-cooled packaged-drive construction, 400 V AC class, 1,465 A current rating, 800 kW normal-duty capability, 630 kW heavy-duty capability, 800 mm deep MCC-style enclosure and filtered input configuration.

This means that when replacing the unit, the complete catalog number should be checked rather than selecting another PowerFlex 755 merely because the voltage and power appear similar.

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5. Product Introduction

The PowerFlex 755 is designed as a high-performance industrial AC drive platform for applications where conventional fixed-speed motor starters are insufficient.

Instead of operating a motor directly from the incoming AC line at a fixed frequency, the drive controls the electrical characteristics supplied to the motor. By adjusting output frequency and voltage and using appropriate motor-control algorithms, the drive can regulate motor speed, torque and acceleration.

For a motor connected to a large mechanical system, this capability can significantly improve process control. The motor can accelerate gradually rather than starting abruptly at full line voltage, and the operating speed can be adjusted according to the production requirement.

The 20G11JC1K4JN4NNNNN takes this concept into the very high-power range. With a current rating around 1,465 A and an approximately 800 kW normal-duty rating, it is intended for major industrial loads rather than small machines.

Its packaged cabinet arrangement also provides a practical way to integrate the drive into larger electrical distribution and motor-control systems.

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6. Main Functions

6.1 Variable Speed Control

The primary function of the drive is variable-speed control of large three-phase AC motors.

The drive converts the incoming AC electrical power into a controlled output suitable for the motor. The output frequency can be varied so that motor speed follows the required process conditions.

This is useful when the process does not need the motor to operate continuously at full speed.

For example, a pump may require different speeds during startup, normal operation and low-demand periods. Instead of continuously running at maximum speed and regulating flow through mechanical throttling, the drive can adjust motor speed directly.

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6.2 Torque Control

The PowerFlex 755 platform supports advanced motor-control methods that provide substantially better torque regulation than basic V/Hz operation.

This is particularly useful for conveyors, compressors, mixers, hoists, process machines and other equipment where motor torque must be controlled accurately.

The control system can therefore respond more effectively to load changes and maintain stable machine operation.

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6.3 Soft Starting and Acceleration

Large motors can create significant mechanical and electrical stress during direct-on-line starting.

Using a variable frequency drive allows acceleration to be controlled.

The motor can ramp from zero speed toward operating speed instead of receiving an abrupt full-speed command. This can reduce mechanical shock to couplings, gearboxes, belts, shafts and other transmission components.

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6.4 Deceleration Control

The drive can also control motor deceleration.

Instead of simply removing power and allowing the motor to coast, the control system can use a programmed deceleration profile.

The exact stopping method depends on the application, motor characteristics and system configuration. This particular catalog configuration does not include dynamic braking as a standard feature, so applications requiring rapid braking need to be evaluated separately.

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7. Communication and Automation Capability

A major advantage of the PowerFlex 755 architecture is its ability to integrate with industrial automation systems.

The platform supports EtherNet/IP, making it suitable for PLC-based control architectures.

Through network communication, a control system can exchange information such as:

• Start and stop commands.
• Speed references.
• Actual motor speed.
• Output current.
• Drive status.
• Fault information.
• Warning information.
• Operating parameters.
• Diagnostic information.

This allows the drive to become part of the machine-control system rather than functioning as an isolated motor controller.

The PowerFlex 755 platform can also support Automatic Device Configuration functions in suitable control architectures. This can simplify drive replacement and commissioning because configured parameters can be associated with the automation system.

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8. Motor-Control Modes

The PowerFlex 755 platform provides multiple motor-control approaches.

V/Hz Control

V/Hz control is comparatively straightforward and can be appropriate for applications where sophisticated torque regulation is not required.

Typical examples include certain fans, pumps and simple constant-speed or variable-speed loads.

Sensorless Vector Control

Sensorless vector control provides better motor performance without necessarily requiring a physical motor feedback device.

It can provide improved speed regulation and torque performance compared with basic V/Hz control.

Vector Control with FORCE Technology

Advanced vector control is intended for applications requiring more precise control of motor torque and speed.

This is particularly valuable for demanding industrial machinery where load changes are significant or where controlled acceleration and stable speed are important.

Permanent Magnet Motor Control

The PowerFlex 755 family can also support suitable permanent-magnet motor applications when the appropriate configuration and motor-control requirements are met.

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9. Typical Applications

9.1 Large Pumps

The model is well suited to large industrial pumping systems.

Examples include:

• Water treatment pumps.
• Process-water pumps.
• Cooling-water pumps.
• Industrial circulation systems.
• Large irrigation systems.
• Water transfer systems.

The ability to adjust motor speed allows the pumping system to follow changing flow requirements.

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9.2 Large Fans and Blowers

Industrial fans and blowers can consume very large amounts of electrical energy.

A variable frequency drive can adjust fan speed according to actual process requirements.

Applications can include:

• Industrial ventilation.
• Furnace air systems.
• Cement-process fans.
• Dust collection systems.
• Exhaust systems.
• Combustion air systems.
• Large cooling systems.

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9.3 Compressors

Large compressors frequently require controlled acceleration, stable speed and accurate response to process requirements.

A PowerFlex 755 drive can be used where the compressor and motor configuration are compatible with variable-frequency operation.

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9.4 Conveyors

Large conveyors can have substantial starting torque requirements.

Controlled acceleration can reduce mechanical shock and improve the overall behavior of the conveyor system.

Potential applications include:

• Mining conveyors.
• Bulk-material conveyors.
• Port handling systems.
• Cement plants.
• Steel plants.
• Aggregate processing.
• Large warehouse or material-handling systems.

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9.5 Cement and Mineral Processing

Large motors are common throughout cement and mineral-processing facilities.

Potential drive applications include:

• Crushers.
• Mills.
• Fans.
• Conveyors.
• Material feeders.
• Large pumps.
• Process ventilation.

The high current and power rating make this type of drive particularly relevant to large process equipment.

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9.6 Metals and Steel Processing

Steel and metal-processing plants often contain high-power motors operating continuously under demanding conditions.

Possible applications include:

• Rolling equipment.
• Large pumps.
• Cooling systems.
• Conveyors.
• Fans.
• Material-processing equipment.

The ability to monitor motor and drive conditions through the automation network can also be valuable in these environments.

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10. Advantages of the Product

10.1 Very High Power Capacity

The most obvious advantage of the 20G11JC1K4JN4NNNNN is its large power-handling capability.

An approximately 800 kW normal-duty rating places this unit in the high-power industrial-drive category.

It is designed for motors that are far beyond the practical range of small cabinet drives.

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10.2 High Current Capacity

The approximately 1,465 A current rating gives the drive the capacity required for very large industrial motors.

This makes it appropriate for centralized heavy-duty motor-control applications.

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10.3 Flexible Motor Control

The PowerFlex 755 architecture supports multiple motor-control strategies.

This allows the same platform to be applied to different types of machinery, provided the motor and application requirements are correctly matched.

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10.4 Industrial Network Integration

EtherNet/IP capability makes integration with PLC and supervisory systems straightforward in suitable industrial architectures.

This can reduce the need for isolated hardwired control arrangements and allows drive operating information to become part of the overall control system.

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10.5 Expandability

The platform supports option modules for functions such as feedback, I/O, communications and safety.

This is useful when the requirements of the machine change during the life of the installation.

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10.6 Integrated Diagnostics

Drive diagnostic information can help maintenance personnel identify problems related to motor operation, drive status, communication, faults and operating conditions.

Predictive diagnostic functions can also help maintenance planning in suitable configurations.

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10.7 Door-Mounted Human Interface

The configured drive includes a door-mounted human interface arrangement.

For large industrial cabinets, this is particularly useful because operators and maintenance personnel can access drive information without necessarily opening the main electrical enclosure.

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10.8 Cabinet-Based Industrial Construction

The 800 mm deep MCC-style packaged construction provides a more complete electrical installation than a simple open-frame drive module.

It can simplify the integration of high-power drive equipment into centralized electrical rooms.

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11. Recommended Same-Series Models

The following five models are suitable candidates for comparison because they belong to the PowerFlex 755 family and share the same general high-power drive architecture.

The exact suitability of each model depends heavily on voltage, current, duty rating, enclosure configuration and application requirements.

Recommended Model	Series	Approx. Voltage	Approx. Current	Approx. Power Rating	Cooling	Configuration / Typical Difference
20G11JC1K2JN4NNNNN	PowerFlex 755	400 V AC	1,175 A	710 kW ND / 560 kW HD	Air cooled	Similar 800 mm MCC-style high-power configuration
20G11JC1K5JN4NNNNN	PowerFlex 755	400 V AC	1,480 A	850 kW ND / 710 kW HD	Air cooled	Slightly higher current and power capability
20G11JC1K6JN4NNNNN	PowerFlex 755	400 V AC	1,590 A	900 kW ND / 710 kW HD	Air cooled	Higher-current configuration
20G11JD1K4JN4NNNNN	PowerFlex 755	480 V AC	Approx. 1,420 A	Approx. 1,250 HP ND / 1,000 HP HD	Air cooled	Similar high-power configuration for 480 V systems
20G11JF1K4JN4NNNNN	PowerFlex 755	690 V AC	Approx. 1,400 A	Approx. 1,400 kW ND / 1,120 kW HD	Air cooled	Higher-voltage configuration for 690 V industrial systems

These models should not be treated as electrically interchangeable.

For a replacement project, the incoming voltage, motor nameplate current, motor power, overload requirement, enclosure type, braking requirements, communication requirements and cabinet arrangement should all be checked before selecting a substitute.

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12. Detailed Comparison of Five Related PowerFlex 755 Models

Model	Voltage Class	Current Class	Normal Duty	Heavy Duty	Cabinet / Cooling	Typical Application
20G11JC1K2JN4NNNNN	400 V	1,175 A	710 kW	560 kW	Air cooled, MCC-style	Large pumps, fans, conveyors
20G11JC1K4JN4NNNNN	400 V	1,465 A	800 kW	630 kW	Air cooled, 800 mm deep	Very large industrial motors
20G11JC1K5JN4NNNNN	400 V	1,480 A	850 kW	710 kW	Air cooled, MCC-style	High-power process equipment
20G11JC1K6JN4NNNNN	400 V	1,590 A	900 kW	710 kW	Air cooled, MCC-style	Extremely high-current motor systems
20G11JF1K4JN4NNNNN	690 V	1,400 A class	1,400 kW class	1,120 kW class	Air cooled, MCC-style	High-voltage industrial drives

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13. Five Popular Allen-Bradley Models for Broader Comparison

The following models are useful for comparison within the broader Allen-Bradley drive portfolio. They are not necessarily direct replacements for the 20G11JC1K4JN4NNNNN because their power levels and applications can differ considerably.

Model	Product Family	Voltage Class	Approx. Power / Current	Cooling	Typical Application	Size / Weight Consideration
20G11GC085JA0NNNNN	PowerFlex 755	400 V AC	85 A / approx. 45 kW ND	Air cooled	Medium industrial motors	Much smaller than Frame 9; substantially lighter
20G11JC1K0JN4NNNNN	PowerFlex 755	400 V AC	1,040 A / approx. 560 kW ND	Air cooled	Large pumps, fans and process machinery	800 mm deep MCC-style cabinet
20G11JC1K2JN4NNNNN	PowerFlex 755	400 V AC	1,175 A / approx. 710 kW ND	Air cooled	Large process motors	Large floor-standing cabinet
20G11JD1K4JN4NNNNN	PowerFlex 755	480 V AC	1,420 A class	Air cooled	Large 480 V industrial motors	Large Frame 9 cabinet
20G11JF1K4JN4NNNNN	PowerFlex 755	690 V AC	1,400 A class / approx. 1,400 kW ND	Air cooled	High-power 690 V systems	Large high-voltage-class cabinet

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14. Dimension and Weight Comparison

For high-power packaged drives, installation space is an important selection factor. The electrical rating alone is not sufficient.

Model	Approx. Height	Approx. Width	Approx. Depth	Approx. Weight	Installation Type
20G11JC1K4JN4NNNNN	2,200 mm class	800 mm class	800 mm	Approx. 1,000 kg class	Floor-standing MCC-style
20G11JC1K2JN4NNNNN	2,200 mm class	800 mm class	800 mm	Approx. 900–1,000 kg class	Floor-standing
20G11JC1K5JN4NNNNN	2,200 mm class	800 mm class	800 mm	Approx. 1,000 kg class	Floor-standing
20G11JC1K6JN4NNNNN	2,200 mm class	800 mm class	800 mm	Approx. 1,000 kg class	Floor-standing
20G11JF1K4JN4NNNNN	2,200 mm class	800 mm class	800 mm	Configuration dependent	Floor-standing

The dimensions and weights in this table should be regarded as engineering planning values rather than lifting-certification values. High-power packaged drives can change substantially in physical weight when different cabinet options, cable compartments, power sections and accessories are included.

For actual foundation loading, transport and crane selection, the final equipment drawing for the exact configuration should be used.

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15. Advantages Compared with a Conventional Motor Starter

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

The PowerFlex 755 approach provides considerably more control.

Function	Conventional Starter	PowerFlex 755
Variable-speed operation	Limited / No	Yes
Controlled acceleration	Limited	Yes
Controlled deceleration	Limited	Yes
Energy optimization through speed control	Limited	Strong potential
Motor torque control	Limited	Advanced
PLC communication	Additional equipment often required	Integrated network capability
Drive diagnostics	Limited	Extensive
Parameter monitoring	Limited	Extensive
Feedback options	Limited	Available
Advanced motor control	No	Yes
High-power industrial applications	Yes	Yes
Process-speed optimization	Limited	Excellent

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16. Energy-Saving Potential

One of the major reasons to install a variable frequency drive on pumps and fans is the possibility of reducing energy consumption when full motor speed is not continuously required.

For centrifugal pumps and fans, power demand can decrease significantly as speed decreases.

For example, a system operating continuously at maximum speed may consume much more energy than necessary during periods of reduced process demand.

By adjusting motor speed according to actual requirements, the drive can potentially reduce unnecessary energy consumption.

The actual savings depend on the pump or fan characteristics, operating profile, system resistance, motor efficiency, process requirements and control strategy.

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17. Maintenance Advantages

Large industrial drives require planned maintenance because they contain power semiconductor components, cooling fans, capacitors, control electronics and communication hardware.

The PowerFlex 755 architecture provides diagnostic information that can help maintenance personnel identify developing problems.

Maintenance teams can monitor operating conditions such as current, speed, faults and warnings and use this information to improve preventive-maintenance planning.

The cabinet construction also makes the drive suitable for centralized electrical-room maintenance strategies.

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18. Important Selection Considerations

Before purchasing a replacement or alternative model, the following parameters should be checked.

Motor Voltage

The drive voltage must match the motor and available electrical supply.

The 20G11JC1K4JN4NNNNN is a 400 V AC class configuration, so it should not automatically be substituted with a 480 V or 690 V model.

Motor Current

Motor full-load current is one of the most important selection parameters.

The replacement drive should have adequate current capacity for the actual motor and operating duty.

Duty Rating

Normal-duty and heavy-duty ratings are not interchangeable.

If the application has high starting torque, overload requirements or significant transient loading, the heavy-duty rating should receive particular attention.

Braking

The specified model has no dynamic braking as a standard configuration.

If the application requires rapid stopping, high-inertia deceleration or regenerative energy handling, the braking system must be evaluated separately.

Enclosure

The enclosure type must match the installation environment.

An electrical-room installation and a dusty industrial process area can have very different requirements.

Cooling

Because this is an air-cooled high-power cabinet, adequate ventilation and thermal management are essential.

The electrical room must be capable of dissipating the heat generated by the drive.

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19. Recommended Applications by Industry

Industry	Application	Suitability
Water & Wastewater	Large pumps	Excellent
Mining	Conveyors, pumps, fans	Excellent
Cement	Mills, fans, conveyors	Excellent
Steel	Large process motors	Excellent
Chemical Processing	Pumps, compressors, fans	Excellent
Oil & Gas	Large pumps and process machinery	Application dependent
Power Generation	Auxiliary pumps and fans	Excellent
Ports	Conveyors and material handling	Excellent
Pulp & Paper	Fans, pumps and process machinery	Excellent
Manufacturing	Large production machinery	Excellent
HVAC / Industrial Cooling	Large fans and pumps	Excellent
Bulk Material Handling	Conveyors and feeders	Excellent

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20. Why the 20G11JC1K4JN4NNNNN Is a High-End Industrial Drive

The combination of high current, high power, cabinet construction and network integration places this model in a very different category from ordinary low-power variable frequency drives.

Its approximately 1,465 A current capacity means that the electrical installation needs to be designed around substantial incoming and outgoing conductors, appropriate protection, thermal management, grounding and cabinet ventilation.

The approximately 800 kW normal-duty rating also means that the connected motor and mechanical system need to be evaluated as a complete system rather than treating the drive as an isolated electrical component.

For large industrial projects, this type of drive is normally part of a broader electrical and automation package.

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21. Product Selection Summary

Category	20G11JC1K4JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product family	PowerFlex 750-Series
Type	High-power AC packaged drive
Input	400 V AC, 3-phase
Current	1,465 A
Normal-duty rating	800 kW
Heavy-duty rating	630 kW
Cooling	Air cooled
Cabinet	MCC-style
Depth	800 mm
Frame	Frame 9
Enclosure	Type 12 / IP54-class
Communication	EtherNet/IP
Control	V/Hz, sensorless vector and advanced vector control
Dynamic braking	None
HIM	Door-mounted LCD interface
Expansion	I/O, feedback, safety and communication options
Approx. dimensions	2,200 × 800 × 800 mm class
Approx. weight	1,000 kg class
Best suited for	Very large industrial AC motors
Main strengths	High power, high current, network integration, flexible control and expandable architecture

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22. Final Assessment

The 20G11JC1K4JN4NNNNN is a high-capacity PowerFlex 755 packaged AC drive intended for large industrial motor applications.

Its most important characteristics are the 400 V AC three-phase input, approximately 1,465 A current rating, approximately 800 kW normal-duty capacity, approximately 630 kW heavy-duty capacity, air-cooled construction, 800 mm deep MCC-style cabinet, filtered input configuration and EtherNet/IP-based automation capability.

Its strongest advantage is the combination of very high power capacity and sophisticated motor-control functionality.

For large pumps, fans, conveyors, compressors, process machinery, mining equipment, cement machinery, steel equipment and other heavy industrial loads, the PowerFlex 755 platform provides considerably more control flexibility than a conventional motor starter.

The five closest comparison choices listed above are primarily 20G11JC1K2JN4NNNNN, 20G11JC1K5JN4NNNNN, 20G11JC1K6JN4NNNNN, 20G11JD1K4JN4NNNNN and 20G11JF1K4JN4NNNNN. Among these, the first three are especially useful when comparing different 400 V high-current configurations, while the latter two are useful when the electrical system uses different voltage classes.

For an actual replacement, however, the complete catalog configuration should always be matched against the existing motor nameplate, input voltage, motor current, duty cycle, enclosure requirement, braking requirement, communication architecture and physical cabinet arrangement. A model with a similar-looking catalog number is not automatically a drop-in replacement.

Overall, 20G11JC1K4JN4NNNNN is best viewed as a large-frame, high-power industrial variable frequency drive for centralized motor-control systems where power capacity, controllability, diagnostics and automation integration are more important than compact physical size.