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Allen-Bradley 20G11BC1K6AN0NNNNN — PowerFlex 755 High-Power AC Drive Detailed Product Guide

1. Product Overview

The 20G11BC1K6AN0NNNNN is a high-power, air-cooled AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase industrial motors where high output current, high motor power, controlled acceleration and deceleration, variable-speed operation, industrial communication, and advanced motor-control functions are required.

This model is a 400 VAC, three-phase, Frame 10 drive with a nominal output current of approximately 1,590 A.

Its principal power ratings are approximately 1,000 kW Light Duty (LD), 900 kW Normal Duty (ND), and 710 kW Heavy Duty (HD).

The drive uses an air-cooled construction, IP20 / Type 1 protection, and a 600 mm deep MCC-style mechanical arrangement.

The configuration represented by 20G11BC1K6AN0NNNNN includes embedded EtherNet/IP, integrated filtering, AC input with DC terminals and precharge, and a blank/no-HIM arrangement.

This makes it particularly suitable for large industrial installations where the drive is normally controlled through a PLC, DCS, SCADA system, or another plant-level automation system.

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2. Brand and Series

The PowerFlex 755 series is a high-performance industrial AC drive platform intended for applications ranging from large pumps and fans to conveyors, process equipment, mining machinery, and other large motor-driven systems.

The series is especially useful where the drive must be integrated into a broader automation system rather than operate as a standalone speed controller.

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3. Main Technical Parameters

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4. Electrical Rating

The 20G11BC1K6AN0NNNNN belongs to the very high-power section of the PowerFlex 755 range.

Its nominal output current is approximately 1,590 A, which makes it suitable for large industrial motors.

The main power ratings can be summarized as follows:

The distinction between these ratings is important.

A 900 kW motor cannot automatically be considered suitable simply because the drive has a 900 kW Normal Duty rating.

The actual motor current, torque requirements, acceleration time, overload profile, ambient conditions, and operating cycle should all be considered.

For large industrial equipment, motor rated current is often one of the most important drive-selection parameters.

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5. Output Current

The approximate 1,590 A output-current rating is one of the defining characteristics of this model.

This places the drive in a high-current industrial category.

A drive at this current level is normally associated with large motors used in heavy industrial plants.

Typical equipment can include:

• Large pumps
• Large cooling fans
• Industrial blowers
• Mining conveyors
• Bulk-material systems
• Heavy process equipment
• Cement machinery
• Metals-processing machinery
• Large material-handling systems
• Other high-power rotating machines

Because the output current is so high, the complete electrical installation must be engineered accordingly.

This includes the incoming power supply, transformer, protective devices, busbars, motor cables, grounding system, cabinet ventilation, and short-circuit protection.

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6. Light Duty, Normal Duty, and Heavy Duty

Understanding the three power ratings is particularly important for this model.

Light Duty — 1,000 kW

The Light Duty rating provides the highest stated motor-power capability.

This rating is generally more appropriate for applications with less severe overload requirements.

Typical examples can include variable-torque applications where the motor load changes relatively smoothly.

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Normal Duty — 900 kW

The Normal Duty rating is approximately 900 kW.

This is a useful reference point for conventional large industrial motor applications.

For many large pumps, fans, blowers, and similar machinery, the Normal Duty rating may be the primary sizing reference.

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Heavy Duty — 710 kW

The Heavy Duty rating is approximately 710 kW.

This lower power rating compared with Light Duty and Normal Duty does not mean the drive is weaker.

Instead, it reflects the greater thermal and overload demands associated with more demanding load profiles.

For applications requiring higher torque or more frequent overload conditions, the Heavy Duty rating is usually the more meaningful selection point.

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7. Product Introduction

The 20G11BC1K6AN0NNNNN is essentially a large-scale industrial motor-control system.

Its purpose is to convert incoming AC electrical power into a controlled output suitable for a large AC motor.

By adjusting output frequency and voltage, the drive can control motor speed and operating characteristics.

This provides several practical advantages over simply connecting the motor directly to a fixed-frequency supply.

The motor can accelerate gradually.

The motor can operate at different speeds.

The motor can stop in a controlled manner.

The process can automatically adjust motor speed.

The control system can monitor the motor and drive.

Faults and warnings can be communicated to the plant automation system.

This is especially valuable when the motor is large enough that starting and stopping it has a significant effect on the mechanical system or the electrical network.

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8. PowerFlex 755 Architecture

The PowerFlex 755 platform is designed around the idea of a flexible industrial drive architecture.

Instead of producing a drive that only performs basic speed control, the platform provides facilities for:

• Speed control
• Torque-related control
• Motor feedback
• Process control
• PID control
• Industrial networking
• Diagnostic monitoring
• Safety functions
• I/O expansion
• Communication options
• Feedback options
• Application-specific configuration

This makes the series suitable for both simple and sophisticated industrial applications.

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9. Embedded EtherNet/IP

The 20G11BC1K6AN0NNNNN includes an embedded EtherNet/IP communication interface.

This is particularly useful for large industrial installations.

A PLC or higher-level control system can exchange information with the drive, such as:

• Start command
• Stop command
• Speed reference
• Actual speed
• Output frequency
• Motor current
• Drive status
• Fault status
• Warning status
• Diagnostic information
• Operating parameters

This allows the drive to become an integrated part of the automation architecture.

For a large production facility, this can significantly improve visibility of motor operation.

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10. No-HIM / Blank Configuration

An important difference between this model and some other PowerFlex 755 configurations is the blank/no-HIM arrangement.

HIM stands for Human Interface Module.

A HIM provides a local display and operator interface.

This particular catalog configuration does not include the standard local HIM.

That does not prevent the drive from being commissioned or controlled.

Instead, commissioning and operation can be performed through the plant control system, communication network, engineering software, or suitable external interface equipment.

This type of configuration is often useful when the drive is installed inside a controlled electrical room and operators normally interact with the equipment through an HMI or SCADA system.

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11. AC Input With Precharge

The drive uses an AC input with precharge arrangement.

Precharge is particularly important for a high-power drive because the DC-link capacitors have substantial capacitance.

When the drive is first energized, the DC-link capacitors must be charged in a controlled way.

The precharge system helps limit the initial charging current and protects the electrical components.

This is an important part of the high-power drive architecture.

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12. DC Terminals

The configuration includes DC terminals.

The DC bus is an important part of the internal drive power structure.

The presence of DC terminals can also be useful in particular system architectures where compatible equipment or a DC-bus arrangement is required.

The actual application of the DC terminals should be determined from the complete system design rather than assumed simply from the existence of the terminals.

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13. EMC Filtering

The 20G11BC1K6AN0NNNNN is configured with filtering.

EMC filtering helps manage high-frequency electrical noise associated with power electronic switching.

This can be important in industrial plants where many electronic systems operate close together.

Good EMC design can help reduce unwanted interference affecting:

• Control systems
• Communication networks
• Instrumentation
• Sensors
• Other electronic equipment

EMC performance also depends on proper grounding, cable selection, cable routing, motor cable length, cabinet construction, and overall installation practice.

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14. CM Jumper Configuration

The specified configuration uses a removed CM jumper arrangement.

This is an important detail when comparing catalog numbers that appear almost identical.

Two PowerFlex 755 drives can have the same voltage, current, frame size, and power rating but still have different catalog numbers because of configuration differences such as:

• CM jumper position
• Filtering
• HIM arrangement
• Input configuration
• Packaging
• Mechanical arrangement

Therefore, when replacing an existing unit, it is important to compare the complete catalog number, not just the first several characters.

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15. Dynamic Braking

The 20G11BC1K6AN0NNNNN does not include a dynamic braking transistor.

This is important for applications with substantial regenerative energy.

When a large motor decelerates, the mechanical energy stored in the rotating load can flow back into the drive.

This can increase DC-bus voltage.

For applications requiring rapid deceleration, the system designer may need to consider:

• Dynamic braking equipment
• Regenerative systems
• Longer deceleration times
• Mechanical braking
• Application-specific energy dissipation

This issue is especially important for high-inertia machines.

A conveyor, fan, pump, or other machine may have very different braking requirements depending on its rotating mass and stopping time.

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16. Main Applications

16.1 Large Pump Systems

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

Examples include:

• Water-treatment pumps
• Industrial circulation pumps
• Cooling-water pumps
• Process-water pumps
• Wastewater pumps
• Large irrigation pumps
• Utility pumps

Variable-speed control allows pump speed to follow process demand.

Instead of continuously operating the pump at maximum speed, the drive can adjust the motor speed according to the required flow or pressure.

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17. Large Fans

Large industrial fans can require hundreds of kilowatts of motor power.

Applications include:

• Industrial ventilation
• Furnace systems
• Exhaust systems
• Combustion-air systems
• Cooling systems
• Process ventilation
• Large air-handling systems

For variable-torque fan applications, reducing motor speed can substantially reduce the required mechanical power.

This can make a high-power VFD attractive not only for process control but also for energy management.

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18. Large Blowers

Industrial blowers often require continuous operation and substantial motor power.

The drive can regulate blower speed according to:

• Air pressure
• Airflow
• Process demand
• Temperature
• Production rate

The integrated PID capability can be useful for maintaining a process variable within a target range.

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19. Mining Applications

The high-current capability of the 20G11BC1K6AN0NNNNN makes it suitable for a range of mining applications.

Potential uses include:

• Conveyor systems
• Ventilation fans
• Large pumps
• Material handling
• Processing machinery
• Ore-handling equipment

Mining machinery often operates continuously and can experience demanding load cycles.

Controlled motor acceleration can reduce mechanical shock and improve overall equipment operation.

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20. Conveyor Systems

Large conveyors can require very high motor power.

A variable-frequency drive provides controlled acceleration rather than applying full speed immediately.

This can help reduce mechanical stress on:

• Conveyor belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Drive pulleys
• Supporting structures

For long conveyors, speed control can also help coordinate multiple sections of a material-handling system.

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21. Cement and Mineral Processing

Cement plants and mineral-processing facilities frequently use very large electric motors.

Possible applications include:

• Large fans
• Pumps
• Conveyors
• Material-handling equipment
• Process machinery
• Cooling systems
• Auxiliary equipment

The high power rating of this drive makes it suitable for the upper end of these industrial applications.

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22. Metals and Heavy Industry

Heavy industrial processes often contain large motors that must operate continuously.

Potential applications include:

• Large process fans
• Pumping systems
• Material handling
• Process lines
• Auxiliary machinery
• Cooling systems
• High-power rotating equipment

The ability to integrate the drive into a plant network is especially useful in large production environments.

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23. Product Advantages

23.1 Very High Power Capability

The drive provides approximately 1,000 kW Light Duty capacity.

This puts it firmly into the high-power industrial category.

It is suitable for motor systems that are far beyond the range of ordinary compact VFDs.

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23.2 1,590 A Output Current

The 1,590 A output-current rating is one of the main reasons to choose this model.

It provides the electrical capacity required for very large motors.

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23.3 900 kW Normal Duty Rating

The 900 kW Normal Duty rating provides substantial continuous motor-control capacity.

This makes the drive suitable for large industrial machines that operate continuously or for long periods.

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23.4 710 kW Heavy Duty Rating

The Heavy Duty rating provides a useful reference for applications with greater torque and overload requirements.

This makes the platform suitable for more than just simple variable-torque loads.

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23.5 Industrial Network Integration

Embedded EtherNet/IP allows the drive to be integrated into a plant-wide control system.

This reduces the need to treat the drive as an isolated device.

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23.6 Flexible Control

The PowerFlex 755 platform supports multiple motor-control approaches.

This allows engineers to select a suitable control method according to the motor, load, and required performance.

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23.7 Advanced Diagnostics

Large industrial motors are often critical to production.

When a drive trips, maintenance personnel need useful information quickly.

The drive can provide operating and diagnostic information through the local or networked control environment.

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23.8 Suitable for Centralized Automation

The no-HIM configuration can be particularly attractive in plants where all operator interaction occurs through a centralized HMI or SCADA system.

This can provide a cleaner electrical-room arrangement.

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24. Mechanical Parameters

Important Note About Weight

For this particular high-power Frame 10 configuration, the catalog number identifies the electrical configuration but does not by itself guarantee one universal physical shipping package.

The 600 mm depth is a useful mechanical reference, but the complete height, width, net mass, and shipping mass depend on the actual packaged configuration.

Because the user specifically requested weight in kilograms, the safest engineering presentation is to state the weight as configuration-dependent rather than inventing a false precise number.

For transportation, floor-loading, crane, forklift, or cabinet-design calculations, the actual equipment nameplate and dimensional drawing should be used.

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25. Five Recommended Models From the Same PowerFlex 755 Series

The following models are useful alternatives or comparison points within the same series.

The 20G11BC1K5AN0NNNNN is particularly close to the target model in terms of current and power.

The 20G11BC2K1AN0NNNNN is a much larger alternative for applications that require substantially more current capacity.

The 20G11BC1K4AN0NNNNN is another close comparison, especially when the application is around the 1,465 A current class.

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26. Comparison With Closest Same-Series Models

The 20G11BC1K6AN0NNNNN provides a step upward in current and power capacity while moving into the larger Frame 10 category.

This makes it a particularly attractive option when a project is close to the upper limit of Frame 9 equipment.

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27. Five Popular Same-Brand Models

For a broader product comparison, the following models are useful examples from the same brand and related industrial drive families.

The PowerFlex 755 models are the closest choices when the application requires very high power.

The PowerFlex 753 family is generally more appropriate for lower-power industrial applications where the full high-power architecture of the PowerFlex 755 is unnecessary.

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28. Typical Application Selection

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29. Advantages for Pump Applications

Pump systems are often among the strongest applications for high-power variable-speed drives.

When a centrifugal pump operates at a lower speed, the required mechanical power can decrease significantly.

This means the drive can potentially reduce energy consumption during periods of reduced demand.

For example, a process may require:

• Maximum flow during production
• Medium flow during normal operation
• Low flow during standby or reduced production

A variable-speed drive can adjust the motor speed accordingly.

This can be more efficient than continuously operating the motor at full speed and controlling flow mainly through throttling.

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30. Advantages for Fan Applications

Fans and blowers also benefit from variable-speed control.

Instead of operating continuously at maximum speed, the drive can regulate the motor according to actual airflow requirements.

This can be useful for:

• Industrial ventilation
• Cooling systems
• Exhaust systems
• Furnace applications
• Process-air systems
• Combustion systems

For large fans, even a relatively small reduction in operating speed can produce a meaningful reduction in power demand.

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31. Advantages for Conveyor Applications

For conveyors, energy savings are not always the main reason for using a VFD.

Controlled acceleration can be even more important.

A large conveyor can contain a significant amount of mechanical mass.

Starting it abruptly can produce mechanical shock.

The drive can provide a controlled acceleration ramp.

This can reduce stress on:

• Belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Pulleys

The same concept applies when stopping the conveyor.

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32. Advantages for Mining Applications

Mining equipment often operates under harsh conditions and high mechanical loads.

The large current capacity of this model allows it to control very large motors.

The ability to integrate the drive into a plant automation network also allows operating data to be monitored from a central location.

This is useful for large facilities where multiple motors and drives are operating simultaneously.

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33. Advantages for Process Industries

Process industries often require motors to respond to changing process conditions.

For example, a pump may need to maintain a particular pressure.

A fan may need to maintain a specific airflow.

A blower may need to maintain a process pressure.

The drive’s control functions can be integrated with a larger process-control system.

This provides a more flexible solution than a simple fixed-speed motor starter.

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34. Control and Monitoring

The drive can be integrated into a control architecture in several ways.

A typical system may include:

PLC

Provides automatic commands and process logic.

HMI

Provides operator visibility and control.

SCADA

Provides centralized monitoring and historical data.

EtherNet/IP

Provides communication between the drive and automation system.

Drive

Controls the motor’s electrical output and operating speed.

This arrangement allows operators to see motor conditions without physically standing next to the drive.

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35. Maintenance Considerations

A drive of this size requires a proper maintenance strategy.

Important areas include:

• Cooling fans
• Airflow
• Electrical connections
• DC bus condition
• Power terminals
• Grounding
• Control wiring
• Communication cables
• Cabinet cleanliness
• Ambient temperature
• Fault history
• Parameter configuration

The cooling system deserves particular attention because high-power semiconductor equipment generates significant heat.

Dust accumulation can reduce cooling efficiency.

A rise in operating temperature can shorten component life.

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36. Installation Considerations

The 600 mm deep MCC-style construction is an important physical characteristic.

This is not a small wall-mounted VFD.

The installation should provide sufficient space for:

• Power cables
• Motor cables
• Control wiring
• Communication cables
• Cooling airflow
• Maintenance access
• Grounding
• Protective equipment
• Service work

The exact height and width should be established from the physical configuration before the cabinet or MCC section is manufactured.

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37. Weight and Transportation

Because this is a Frame 10 high-power drive, transportation planning is important.

The exact weight depends on the physical configuration and packaging.

The equipment should not be treated as a lightweight standalone inverter.

Before transportation or installation, engineers should consider:

• Floor loading
• Forklift capacity
• Crane capacity
• Lifting points
• Shipping packaging
• Access doors
• Elevator capacity
• Installation location
• Cabinet assembly

The exact net weight in kg should be taken from the actual supplied equipment documentation rather than estimated from an electrically similar catalog number.

This is especially important when the drive is part of a packaged MCC assembly.

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38. Main Product Advantages at a Glance

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39. Full Parameter Summary

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40. Overall Product Assessment

The 20G11BC1K6AN0NNNNN is a high-power PowerFlex 755 AC drive intended for large-scale industrial motor-control applications.

Its 1,590 A output current, 1,000 kW Light Duty rating, 900 kW Normal Duty rating, and 710 kW Heavy Duty rating place it among the larger air-cooled drive configurations in this product family.

The move to Frame 10 is significant.

Compared with smaller Frame 9 models, this configuration provides additional electrical capacity and is intended for applications where the motor current and power requirements are approaching the upper end of the smaller frame.

The 400 VAC three-phase input makes it suitable for common industrial medium-to-high-power motor systems.

The 600 mm deep MCC-style construction makes it appropriate for a properly designed motor-control center or industrial electrical-room installation.

The embedded EtherNet/IP capability is another major strength.

The drive can exchange operating and diagnostic information with a plant automation system, allowing operators to monitor large motors without having to rely entirely on local access.

The no-HIM configuration is particularly suitable for installations where centralized control is preferred.

For pump and fan systems, the drive can provide variable-speed operation and potentially significant energy savings when the load characteristics are appropriate.

For conveyors and heavy material-handling equipment, controlled acceleration and speed regulation can reduce mechanical stress.

For mining, cement, metals, and process industries, the high-current architecture provides the capacity needed for very large motors.

The main point that deserves special attention is drive sizing.

The 1,000 kW Light Duty rating should not be treated as a universal motor-power limit.

The actual motor current, load torque, overload profile, acceleration requirements, ambient temperature, installation altitude, cooling conditions, and braking requirements should all be evaluated.

The absence of a dynamic braking transistor is also important for machinery with high inertia or frequent rapid deceleration.

From a mechanical perspective, the 600 mm depth is a useful reference, but the complete height, width, installation footprint, and exact weight in kg depend on the actual physical configuration.

For transportation and structural planning, the final equipment dimensions and nameplate weight should always take priority over a generic catalog estimate.

Overall, the 20G11BC1K6AN0NNNNN is best suited to projects that need a very high-power, high-current industrial AC drive with PowerFlex 755 architecture, embedded EtherNet/IP communication, air cooling, and Frame 10 construction.

It is a particularly strong candidate for large pumps, fans, blowers, conveyors, mining equipment, material-handling systems, and other heavy industrial machinery where a conventional compact VFD would not provide sufficient current or power capacity.