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Allen-Bradley 20G11LC1K0AN0NNNNN — PowerFlex 755 AC Packaged Drive

1. Product Overview

The 20G11LC1K0AN0NNNNN is a high-power air-cooled AC variable frequency drive from the Allen-Bradley PowerFlex 755 series. It is designed for large industrial motors where high current capacity, reliable speed control, industrial networking and robust cabinet-style construction are required.

This model is a 400 VAC, three-phase, 1040 A drive. It is built around a large Frame 9 architecture and uses an 800 mm deep MCC-style enclosure. The drive is air cooled and uses a Type 1 / IP20 enclosure arrangement.

The model is intended for large industrial installations rather than compact machine-control applications. Typical installations include large pumps, fans, conveyors, compressors, material-handling equipment, process machinery, mining equipment and other high-power rotating machinery.

The catalog number identifies a specific configuration within the PowerFlex 755 platform. The complete model number is important because different letters and option positions can represent differences in voltage class, enclosure arrangement, filtering, braking, operator interface and other factory-configured features.

The 20G11LC1K0AN0NNNNN is therefore best understood as a complete packaged high-power drive configuration rather than simply a generic inverter.

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2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Product Configuration	Air-Cooled AC Packaged Drive
Model	20G11LC1K0AN0NNNNN
Drive Construction	Large-frame / Frame 9
Cooling	Air cooled
Input Type	AC input with precharge and DC terminals
Input Voltage	400 VAC
Input Phase	Three-phase
Rated Current	1040 A
Enclosure	Type 1 / IP20
Cabinet Style	800 mm deep MCC style
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Main Application	Large industrial motor control

The product belongs to the PowerFlex 755 series, which is designed for applications requiring considerably more functionality and power capacity than a basic-purpose variable frequency drive.

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3. Main Technical Parameters

Parameter	Specification
Model	20G11LC1K0AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive type	AC variable frequency drive
Input voltage	400 VAC
Input phase	3-phase
Rated output current	1040 A
Light-duty power	630 kW
Normal-duty power	560 kW
Heavy-duty power	500 kW
Frame	Frame 9
Cooling	Air cooled
Enclosure	Type 1 / IP20
Cabinet style	MCC style
Cabinet depth	800 mm
Input arrangement	AC input with precharge
DC terminals	Yes
Dynamic braking	None
Embedded communication	EtherNet/IP
Control platform	PowerFlex 755
Installation category	Large industrial cabinet / MCC
Approximate overall depth	800 mm class
Approximate width	Configuration dependent; large-frame MCC construction
Approximate height	Configuration dependent; large-frame MCC construction
Approximate weight	Approximately 650–800 kg
Cooling requirement	Forced-air / air-cooled architecture
Intended motor class	Large industrial motors
Typical application	Pumps, fans, conveyors, compressors, process machinery
Installation environment	Industrial electrical rooms / MCC areas

The 800 mm dimension represents the cabinet-depth class associated with this configuration. The complete height and width depend on the exact packaged-drive arrangement.

For transportation, foundation design, lifting, cabinet layout and installation clearance, the final mechanical drawing for the actual unit should always be used.

The weight is likewise best treated as an engineering estimate. A Frame 9 packaged drive of this type can have different actual weights depending on cabinet construction and selected options. For preliminary planning, approximately 650–800 kg is a reasonable range, but the actual shipping weight should be confirmed from the equipment documentation or nameplate.

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4. Electrical Rating

The 20G11LC1K0AN0NNNNN is a high-current 400 V class drive.

Its principal current rating is 1040 A, placing it firmly in the large industrial-drive category.

The applicable power ratings vary according to the required duty level.

Duty Rating	Approximate Power Rating
Light Duty	630 kW
Normal Duty	560 kW
Heavy Duty	500 kW

This distinction is important when selecting the drive for a motor.

A motor that operates continuously at a relatively stable load may be evaluated against the normal-duty rating, while an application involving repeated overloads, high starting torque or demanding acceleration may need to be evaluated against the heavy-duty rating.

The motor’s actual rated current should always be compared with the drive’s applicable current rating rather than selecting the drive only by motor horsepower or kilowatt value.

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5. Product Introduction

The PowerFlex 755 is a high-performance industrial AC drive platform developed for large and technically demanding motor applications.

The 20G11LC1K0AN0NNNNN represents a large Frame 9 configuration within this platform.

Its 400 VAC, 1040 A rating makes it suitable for large motors commonly found in manufacturing plants, infrastructure systems, process plants and heavy industries.

Compared with a small cabinet-mounted frequency converter, this type of drive is designed around a much larger electrical and mechanical architecture.

The large MCC-style construction provides space for high-power switching components, cooling equipment, bus structures and other components required for large motor control.

The drive can also communicate with industrial automation systems through embedded EtherNet/IP, allowing motor operation to be incorporated into a larger control strategy.

For example, a plant controller can use the drive to control motor speed while simultaneously receiving information such as operating status, current, speed, warnings and fault conditions.

This makes the drive suitable not only for motor speed regulation but also for integrated process-control systems.

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6. Product Structure and Configuration

The catalog number 20G11LC1K0AN0NNNNN can be understood as a structured configuration code.

Catalog Number Section	Configuration Meaning
20G	PowerFlex 755 drive family
11	Packaged / large-frame drive configuration
L	400 VAC voltage class
1K0	Approximately 1040 A current class
A	Specific enclosure / configuration option
N	No dynamic braking configuration
0	Associated factory configuration
NNNNN	Additional option positions with standard/no additional option selection

The exact catalog-number decoding should be used together with the drive’s rating label because a complete catalog number contains multiple configuration fields.

The most important practical information in this model is that it represents a 400 VAC, 1040 A, air-cooled, Frame 9, 800 mm deep MCC-style PowerFlex 755 drive.

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7. Product Applications

7.1 Large Pumps

Large industrial pumps are one of the most suitable applications for this type of drive.

Instead of running a motor continuously at one fixed speed, the drive can regulate motor speed according to process requirements.

This can be useful in water circulation, industrial cooling, process-water systems, wastewater systems, chemical processes and other fluid-handling applications.

Variable-speed operation can also reduce unnecessary mechanical throttling and allow the motor to respond more closely to changing process demand.

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7.2 Large Fans and Blowers

Industrial ventilation systems often contain large motors that operate for many hours.

A variable frequency drive allows fan speed to be adjusted according to airflow, pressure or temperature requirements.

Typical applications include:

• Industrial ventilation
• Furnace ventilation
• Dust collection
• Process exhaust
• Cooling systems
• Air-handling equipment
• Large building ventilation

For applications with highly variable airflow requirements, variable-speed operation can be particularly useful.

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7.3 Conveyors

Large conveyors can require substantial motor torque, especially during acceleration and when transporting heavy material.

The drive can provide controlled acceleration and deceleration, reducing sudden mechanical stress on belts, couplings, gearboxes and conveyor structures.

Applications can include:

• Mining conveyors
• Bulk-material conveyors
• Port equipment
• Cement plants
• Steel plants
• Aggregate handling
• Warehouse and industrial material handling

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7.4 Compressors

Large compressors can require several hundred kilowatts of motor power.

A variable frequency drive can regulate compressor speed according to process pressure, production demand or other control variables.

The 1040 A rating gives this model the electrical capacity needed for many large compressor applications.

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7.5 Mining Equipment

Mining operations commonly use high-power motors for conveyors, pumps, fans, crushers and other equipment.

The large current capacity of this drive makes it suitable for large motor installations where compact drives cannot provide sufficient output.

The drive can also be integrated into centralized plant automation systems.

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7.6 Cement and Building-Material Plants

Large cement and aggregate plants contain many high-power rotating machines.

Possible applications include:

• Large fans
• Pumps
• Conveyors
• Crushers
• Material-handling systems
• Process ventilation
• Auxiliary machinery

The PowerFlex 755 platform is well suited to installations where several large drives need to be coordinated through an industrial control system.

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7.7 Steel and Metal Processing

Steel and metal-processing facilities frequently use large motors for material handling, ventilation, pumping and process equipment.

The drive’s large current rating and industrial communication capability make it appropriate for these high-power applications.

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8. Main Product Advantages

8.1 High Current Capacity

The most significant feature of the 20G11LC1K0AN0NNNNN is its 1040 A current rating.

This allows it to control substantially larger motors than the small and medium PowerFlex drives normally used for machine applications.

For a plant operating large 400 V motors, this makes the model a practical high-power solution.

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8.2 400 VAC Three-Phase Compatibility

The drive is designed for the 400 VAC class commonly found in industrial electrical systems.

This makes it particularly suitable for facilities where large motors operate from a 400 V three-phase distribution system.

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8.3 High Power Capability

The drive provides approximately:

• 630 kW light-duty capability
• 560 kW normal-duty capability
• 500 kW heavy-duty capability

This allows the same drive platform to be considered for different operating conditions depending on the motor load profile.

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8.4 Embedded EtherNet/IP

Integrated industrial Ethernet communication is another important advantage.

The drive can exchange information with a larger automation system without requiring every operating value to be transmitted through individual hardwired signals.

Typical information can include:

• Speed reference
• Actual speed
• Motor current
• Torque
• Drive status
• Fault information
• Warning information
• Start/stop commands
• Operating parameters

This can simplify system integration and improve troubleshooting.

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8.5 Large MCC-Style Construction

The 800 mm deep MCC-style construction is designed for large industrial electrical installations.

This format is particularly suitable for plants where drives are installed together with motor-control equipment and other large electrical assemblies.

It also provides a more practical physical arrangement for high-power components than attempting to fit the same electrical capacity into a small cabinet.

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8.6 Air-Cooled Design

Large drives generate significant heat during operation.

The air-cooled architecture provides a practical method of removing heat from the power section.

For reliable operation, cooling airflow must remain unobstructed and the cooling system should be maintained regularly.

Dust accumulation, blocked ventilation paths and deteriorated cooling fans can negatively affect drive performance and service life.

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8.7 Flexible Application Range

The PowerFlex 755 architecture is intended for more than basic frequency conversion.

It can be incorporated into systems requiring:

• Variable-speed control
• Torque regulation
• Process control
• Network control
• Motor monitoring
• Fault diagnostics
• Integrated automation

This makes it useful in larger and more sophisticated industrial systems.

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9. Installation Considerations

A drive of this size requires careful planning before installation.

The first consideration is physical space.

The unit uses a large MCC-style construction with an approximately 800 mm cabinet depth. Adequate front access, cable-entry space, ventilation and maintenance clearance should be provided.

The second consideration is weight.

With a planning weight of roughly 650–800 kg, mechanical handling equipment may be required during transportation and installation.

The third consideration is ventilation.

The drive is air cooled, so sufficient airflow must be maintained around the cooling system.

The fourth consideration is electrical protection.

The incoming supply, protective devices, grounding, disconnecting equipment, cable sizing and short-circuit conditions should be evaluated as part of the complete electrical design.

The fifth consideration is motor compatibility.

The motor voltage, full-load current, insulation system, cable length and application duty should be checked before final selection.

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10. Five Recommended Models from the Same PowerFlex 755 Series

The following models are closely related to the target model and are useful when comparing different current ratings or voltage classes within the same large-frame platform.

Model	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	Frame	Enclosure	Depth	Weight kg
20G11LC1K0AN0NNNNN	400 V	1040 A	630 kW	560 kW	500 kW	9	Type 1 / IP20	800 mm	~650–800
20G11LC1K1AN0NNNNN	400 V	1090 A	710 kW	630 kW	500 kW	9	Type 1 / IP20	800 mm	~650–800
20G11LC1K2AN0NNNNN	400 V	1175 A	800 kW	710 kW	560 kW	9	Type 1 / IP20	800 mm	~650–800
20G11LC1K4AN0NNNNN	400 V	Higher-current class	Higher power class	Higher power class	Higher power class	9	Type 1 / IP20	800 mm	~650–850
20G11LF1K0JN0NNNNN	690 V	1040 A	1100 kW	1000 kW	900 kW	9	Type 1 / IP20	800 mm	~650–850
20G11LD1K0JN0NNNNN	480 V	1045 A	1000 HP	900 HP	750 HP	9	Type 1 / IP20	800 mm	~650–850

The first three alternatives are particularly useful when the motor operates from a 400 V industrial supply.

The 690 V model is a useful alternative when the plant distribution and motor voltage are based on a 690 V system.

The 480 V model is appropriate where the motor and electrical distribution are based on 480 V.

When selecting between these models, voltage compatibility should be checked before comparing kW ratings.

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11. Detailed Comparison of Same-Series Alternatives

Model	Main Difference	Recommended When
20G11LC1K0AN0NNNNN	400 V / 1040 A	The motor is within the approximately 500–630 kW range and requires a large 400 V drive
20G11LC1K1AN0NNNNN	400 V / 1090 A	Additional current and power margin is required
20G11LC1K2AN0NNNNN	400 V / 1175 A	A larger 400 V motor requires higher current capacity
20G11LC1K4AN0NNNNN	Higher 400 V current class	Very large 400 V motor applications
20G11LF1K0JN0NNNNN	690 V / 1040 A	Large motor is designed for 690 V
20G11LD1K0JN0NNNNN	480 V / 1045 A	Large motor is designed for 480 V

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12. Five Popular Allen-Bradley Models for Comparison

For a broader comparison, the following models cover different sizes and applications within the Allen-Bradley drive range.

Model	Series / Family	Typical Voltage	Current / Power Class	Cooling	Frame	Approx. Depth	Weight kg
20G11LC1K0AN0NNNNN	PowerFlex 755	400 V	1040 A / 630 kW LD	Air cooled	9	800 mm	~650–800
20G11LD1K0AN0NNNNN	PowerFlex 755	480 V	1045 A / 1000 HP LD	Air cooled	9	800 mm	~650–850
20G11LF1K0JN0NNNNN	PowerFlex 755	690 V	1040 A / 1100 kW LD	Air cooled	9	800 mm	~650–850
20G11LC1K2AN0NNNNN	PowerFlex 755	400 V	1175 A / 800 kW LD	Air cooled	9	800 mm	~650–850
20G11LF710JN0NNNNN	PowerFlex 755	690 V	710 A class	Air cooled	9	800 mm	~600–800
20G11LD800AN0NNNNN	PowerFlex 755	480 V	800 A class	Air cooled	9	800 mm	~600–800

These models are not interchangeable simply because they have similar physical construction.

The motor voltage, motor current and duty requirement remain the three most important factors when making the final selection.

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13. 400 V, 480 V and 690 V Selection

For large drives, voltage selection is especially important.

System Voltage	Example Model	Typical Advantage
400 V	20G11LC1K0AN0NNNNN	Suitable for large 400 V industrial motors
480 V	20G11LD1K0AN0NNNNN	Suitable for large 480 V motors
690 V	20G11LF1K0JN0NNNNN	Suitable for very large 690 V motors

A 400 V motor should not simply be connected to a 480 V or 690 V drive because the drive has a larger current rating.

The drive voltage class must match the motor and electrical distribution design.

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14. Suitable Motor Applications

Application	Typical Motor Characteristics	Suitability
Large centrifugal pump	High power, variable load	Excellent
Large industrial fan	Long operating hours, variable speed	Excellent
Conveyor	High starting torque	Excellent
Crusher	High mechanical load	Very good
Compressor	Large continuous motor load	Excellent
Mining conveyor	High power and long duty cycle	Excellent
Cooling-water pump	Continuous industrial operation	Excellent
Cement plant equipment	High-power process machinery	Excellent
Steel plant auxiliary equipment	High-power industrial motor	Excellent
Material handling	Large motor and controlled acceleration	Excellent

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15. Advantages in Industrial Automation

The 20G11LC1K0AN0NNNNN is particularly useful when the motor is not operated as an isolated piece of equipment.

In a modern industrial plant, the drive can become part of the overall automation architecture.

For example, a controller can issue a speed reference to the drive while the drive returns actual motor speed and current.

If an abnormal condition occurs, diagnostic information can be communicated to the control system.

This makes troubleshooting easier because maintenance personnel can often identify the operating condition of the drive without physically inspecting every component.

For production lines, this can also make it easier to coordinate several motors.

A conveyor, pump and fan can each have their own drive while being controlled by a common automation system.

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16. Maintenance Advantages

The large industrial architecture is also advantageous from a maintenance perspective.

The drive is intended for industrial installations where serviceability is important.

Regular maintenance should normally include:

• Inspection of cooling fans
• Inspection of ventilation passages
• Cleaning of accumulated dust
• Checking electrical connections
• Inspection of grounding
• Checking cabinet temperature
• Inspection of warning and fault history
• Checking network communication
• Inspection of motor cables
• Checking for abnormal noise or vibration

Cooling-system maintenance is especially important because the drive is air cooled.

A large power semiconductor system generates considerable heat, and reduced airflow can increase component temperature.

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17. Product Selection Advantages Compared with Smaller Drives

A major advantage of using a large PowerFlex 755 rather than multiple smaller general-purpose drives is the ability to provide a unified high-power control platform.

For example, a plant with several large pumps can use similar drive architecture across the installation.

This can simplify:

• Engineering
• Programming
• Operator training
• Spare-parts planning
• Maintenance
• Fault diagnosis
• Network integration
• Drive parameter management

The standardized platform can be especially valuable for large factories where many motor-control systems need to be maintained by the same engineering and maintenance teams.

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18. Important Points Before Purchasing

Before purchasing the 20G11LC1K0AN0NNNNN, the following points should be checked carefully:

Check Item	Why It Matters
Motor voltage	Must match the drive voltage class
Motor full-load current	Determines whether the 1040 A rating is sufficient
Motor power	Must be evaluated together with duty rating
Duty type	Light, normal or heavy duty changes the applicable rating
Starting torque	Important for conveyors, crushers and similar loads
Overload requirement	High-overload applications may require a larger drive
Enclosure	IP20 / Type 1 may require an appropriate electrical room or cabinet environment
Cooling	Airflow must be adequate
Installation depth	Approximately 800 mm cabinet-depth class
Weight	Plan for approximately 650–800 kg during preliminary layout
Braking	This configuration has no dynamic braking
Network	Embedded EtherNet/IP can be used for automation integration
Motor cable	Cable length and insulation should be evaluated
Harmonics	High-power installations may require system-level harmonic analysis
Protection	Incoming protection must be correctly engineered
Maintenance space	Adequate access must be provided
Environmental conditions	Temperature, humidity, dust and altitude must be considered

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19. Overall Product Evaluation

The 20G11LC1K0AN0NNNNN is a high-capacity industrial AC drive designed around the requirements of large 400 V motor systems.

Its most important characteristics are its 1040 A current rating, 630 kW light-duty rating, 560 kW normal-duty rating, 500 kW heavy-duty rating, Frame 9 construction, air cooling, 800 mm deep MCC-style enclosure, Type 1 / IP20 protection and embedded EtherNet/IP capability.

The model is particularly suitable for applications where the motor is large enough that conventional compact drives are no longer appropriate.

Large pumps, fans, conveyors, compressors, mining machinery, cement equipment, steel-processing machinery and other heavy industrial systems are all potential application areas.

The biggest advantage is not simply the maximum kW rating. The real value comes from the combination of high current capability, large-frame construction, industrial networking and the flexibility of the PowerFlex 755 platform.

For a 400 V industrial motor requiring a large amount of current, this model provides a strong solution when the application fits within its duty rating.

When choosing an alternative, the 20G11LC1K1AN0NNNNN and 20G11LC1K2AN0NNNNN are logical choices when additional current capacity is required, while the 20G11LD1K0AN0NNNNN and 20G11LF1K0JN0NNNNN become more relevant when the motor voltage changes to 480 V or 690 V.

The final selection should always be based on the motor nameplate current, voltage, load profile, overload requirement, installation environment and complete electrical system design rather than on motor kW alone.

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20. Quick Reference

Item	Final Specification
Brand	Allen-Bradley
Series	PowerFlex 755
Model	20G11LC1K0AN0NNNNN
Product type	AC Variable Frequency Drive
Voltage	400 VAC
Phase	3-phase
Current	1040 A
Light-duty rating	630 kW
Normal-duty rating	560 kW
Heavy-duty rating	500 kW
Frame	Frame 9
Cooling	Air cooled
Enclosure	Type 1 / IP20
Cabinet style	800 mm deep MCC style
Approx. depth	800 mm
Approx. weight	650–800 kg
Dynamic braking	None
Communication	Embedded EtherNet/IP
Main applications	Pumps, fans, conveyors, compressors, mining and process machinery
Best suited for	Large 400 V industrial motors

The 20G11LC1K0AN0NNNNN can therefore be summarized as a large-frame, 400 V, 1040 A PowerFlex 755 industrial AC drive intended for high-power motor applications where reliable speed control, high current capacity, industrial networking and robust MCC-style construction are required.