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Allen-Bradley 20G11BC1K6JN0NNNNN — Detailed PowerFlex 755 High-Power AC Drive Product Guide

1. Product Overview

The 20G11BC1K6JN0NNNNN 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 requiring very high current capacity, variable-speed control, controlled acceleration and deceleration, process regulation, industrial networking, and advanced motor-control functions.

This model is rated for a 400 VAC, three-phase input and provides approximately 1,590 A nominal output current.

Its principal power ratings are 1,000 kW Light Duty, 900 kW Normal Duty, and 710 kW Heavy Duty.

The drive uses a Frame 10 construction and an IP20 / Type 1, 600 mm deep MCC-style arrangement. It is air cooled and intended primarily for installation in industrial electrical rooms, MCC systems, or other appropriately engineered electrical enclosures.

The model includes embedded EtherNet/IP, integrated filtering, AC input with precharge, DC terminals, and a blank/no-HIM configuration.

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2. Brand and Product Series

The PowerFlex 755 series is positioned for large and demanding industrial motor-control applications.

It is especially appropriate when a project needs considerably more than basic VFD functionality, such as network communication, process control, diagnostics, feedback options, safety functions, and integration into a plant automation architecture.

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3. Main Technical Parameters

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4. Electrical Rating

The 20G11BC1K6JN0NNNNN is a very high-power AC drive.

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

The three principal power classifications are:

These ratings should not be interpreted simply as three interchangeable motor-power values.

The appropriate rating depends on the actual application.

For a pump or fan with a relatively smooth variable-torque load, the Light Duty or Normal Duty rating may be appropriate.

For a conveyor or heavy process machine with higher torque and overload requirements, the Heavy Duty rating is more important.

The actual motor nameplate current should always be checked before final drive selection.

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5. Output Current — 1,590 A

The 1,590 A output-current capability is one of the most important characteristics of this model.

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

Applications at this current level generally involve motors used for:

• Large pumps
• Large cooling systems
• Industrial fans
• Large blowers
• Mining conveyors
• Bulk-material handling
• Cement processing
• Mineral processing
• Metals processing
• Heavy industrial machinery
• Large process equipment

The electrical installation must be designed accordingly.

High-current applications require careful consideration of:

• Motor cable sizing
• Busbar sizing
• Protective devices
• Transformer capacity
• Short-circuit rating
• Grounding
• Cabinet connections
• Ventilation
• Heat dissipation
• Maintenance access

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6. Light Duty Rating — 1,000 kW

The 1,000 kW Light Duty rating is the highest power rating associated with this configuration.

It is particularly relevant for applications where the motor does not experience severe overload conditions.

Examples may include large:

• Centrifugal pumps
• Fans
• Blowers
• Cooling systems
• Variable-torque machines

For these applications, the motor generally operates with a relatively predictable torque profile.

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7. Normal Duty Rating — 900 kW

The 900 kW Normal Duty rating is a key selection point for conventional high-power industrial applications.

This rating can be relevant to large continuous-duty motors used in:

• Process plants
• Water systems
• Industrial ventilation
• Large material-handling systems
• Heavy manufacturing
• Large auxiliary systems

A motor with a 900 kW nameplate rating should still be checked against its actual full-load current and overload requirements.

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8. Heavy Duty Rating — 710 kW

The 710 kW Heavy Duty rating is important for applications requiring greater torque or overload capability.

Heavy Duty operation can involve:

• Higher starting torque
• Higher acceleration torque
• Repeated overload
• More severe load cycles
• Higher mechanical resistance

Typical examples may include:

• Conveyors
• Heavy material handling
• Certain processing machines
• High-inertia machinery
• Mining equipment

The Heavy Duty rating should be used when sizing the drive for a demanding load rather than simply using the largest published kW figure.

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9. Product Introduction

The 20G11BC1K6JN0NNNNN is designed to control large AC motors by regulating the electrical frequency and voltage supplied to the motor.

A conventional fixed-speed motor system generally operates at or near the frequency of the incoming electrical supply.

A variable frequency drive provides much greater flexibility.

The motor can be:

• Started gradually
• Stopped gradually
• Operated at different speeds
• Controlled according to process demand
• Integrated with automatic process-control functions
• Monitored through an industrial network

This is particularly valuable when the motor is large and the starting current, mechanical shock, or process variation would otherwise create significant problems.

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10. PowerFlex 755 Platform

The PowerFlex 755 platform is intended for applications where a basic speed controller is not sufficient.

The platform supports a broad range of functions related to:

• Motor control
• Speed control
• Torque control
• Feedback
• Process control
• PID control
• Industrial communication
• Diagnostics
• Safety
• I/O
• Application customization

This makes it suitable for large industrial machines where motor control is closely connected to the overall automation system.

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11. Embedded EtherNet/IP

The drive has embedded EtherNet/IP communication.

This is particularly useful in modern industrial automation systems.

The drive can communicate operating information and commands with the control system.

Typical information can include:

This communication capability can reduce the need for separate hardwired signals and can provide more detailed operating information.

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12. Blank / No-HIM Configuration

The 20G11BC1K6JN0NNNNN is configured without a standard local HIM.

HIM means Human Interface Module.

A HIM is commonly used for local drive setup, monitoring, parameter adjustment, and troubleshooting.

The absence of a HIM can be advantageous in an installation where the drive is controlled centrally.

For example, operators may normally use a plant HMI or SCADA system instead of physically operating the drive.

This configuration can therefore be suitable for:

• Centralized control rooms
• MCC installations
• Large process plants
• Automated production systems
• Remote-controlled motor systems

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13. AC Input With Precharge

The drive uses an AC input with precharge arrangement.

Large VFDs contain substantial DC-link capacitance.

When the drive is energized, these capacitors must be charged in a controlled manner.

Precharge reduces the initial charging current and helps protect the drive’s power components.

This becomes increasingly important as drive power and DC-link capacitance increase.

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14. DC Terminals

The model includes DC terminals.

The DC bus is a fundamental part of the drive’s internal power-conversion system.

DC terminals can also be useful for particular system architectures involving compatible DC-bus equipment.

However, the exact use of the terminals should always be based on the complete system design.

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15. Integrated Filtering

The 20G11BC1K6JN0NNNNN is configured as a filtered drive.

Filtering is important in high-power switching applications because the rapid switching of semiconductor devices can generate high-frequency electrical components.

Proper filtering and installation practices can help manage electromagnetic interference.

Overall EMC performance also depends on:

• Grounding
• Cable routing
• Motor cable type
• Cable length
• Cabinet construction
• Shielding
• Installation practices

Therefore, the filter itself should not be considered a substitute for correct system-level EMC design.

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16. CM Jumper Installed

This model uses a CM jumper installed configuration.

CM refers to common-mode considerations within the drive’s input and grounding arrangement.

This is an important catalog configuration detail.

Two models can have very similar electrical ratings but differ in their catalog numbers because of:

• CM jumper configuration
• Filtering
• Input configuration
• HIM configuration
• Mechanical arrangement
• Option selection

Therefore, when replacing an existing drive, the complete catalog number should be checked.

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17. Dynamic Braking

The 20G11BC1K6JN0NNNNN does not include a dynamic braking transistor.

This matters when the application contains a large amount of stored mechanical energy.

During rapid deceleration, a motor can act as a generator and send energy back into the drive.

This can raise the DC-bus voltage.

Applications with frequent or rapid stopping may therefore require a separate braking strategy.

Potential approaches include:

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

This is especially important for large conveyors and high-inertia rotating machines.

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18. Main Product Applications

18.1 Large Pumping Systems

The drive is very suitable for large pumping applications.

Typical applications include:

• Water supply
• Industrial water circulation
• Cooling-water systems
• Process-water systems
• Wastewater
• Large irrigation systems
• Utility pumping

Variable-speed operation allows the motor speed to be adjusted to the actual flow or pressure requirement.

This can be more efficient than continuously operating a large pump at full speed.

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19. Large Industrial Fans

Large fans can consume significant electrical power.

Applications may include:

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

The drive allows airflow to be adjusted according to actual process requirements.

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20. Large Blowers

Industrial blowers can require large motors and continuous operation.

The drive can regulate blower speed according to:

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

PID control can also be useful when the blower must maintain a particular process variable.

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21. Mining and Bulk Material Handling

Mining applications are an excellent match for a high-current drive.

Potential applications include:

• Mining conveyors
• Ore handling
• Material transfer
• Large ventilation fans
• Large dewatering pumps
• Processing equipment

Mining machines frequently operate under demanding mechanical conditions.

Controlled acceleration can help reduce shock loading on belts, gearboxes, shafts, and couplings.

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22. Conveyor Systems

Large conveyors often have significant mechanical inertia.

Directly starting a large motor can create substantial mechanical and electrical stress.

A VFD can provide a controlled acceleration profile.

Benefits can include:

• Smoother starting
• Reduced belt shock
• Reduced gearbox stress
• Reduced coupling stress
• Improved speed control
• Better coordination between conveyor sections
• Controlled stopping

This can be particularly useful for long-distance conveyors and bulk-material systems.

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23. Cement and Mineral Processing

Large cement and mineral-processing facilities often use very large motors.

Potential applications include:

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

The high power rating of this model makes it suitable for the upper range of such applications.

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24. Metals and Heavy Manufacturing

Heavy manufacturing facilities can require very large motors for continuous-duty equipment.

The drive may be used for:

• Large fans
• Pumping systems
• Material handling
• Process machinery
• Cooling systems
• Production equipment

The embedded communication capability is especially useful when the motor must be monitored by a centralized automation system.

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25. Product Advantages

25.1 Very High Current Capacity

The 1,590 A output rating is the most obvious advantage.

It allows the drive to control motors far larger than those normally served by compact VFDs.

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25.2 High Power Capacity

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

This makes it suitable for very large industrial motor systems.

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25.3 Strong Normal Duty Capability

The 900 kW Normal Duty rating gives the drive substantial continuous operating capability.

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25.4 Heavy Duty Capability

The 710 kW Heavy Duty rating allows the drive to be considered for more demanding torque and overload applications.

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25.5 Embedded Industrial Communication

Embedded EtherNet/IP makes integration with the automation system straightforward.

The drive can communicate both control commands and operating information.

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25.6 Flexible Process Control

PID capability makes the drive suitable for applications where motor speed must respond automatically to a process variable.

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25.7 Advanced Diagnostic Capability

Large industrial drives can be critical to production.

Useful status and diagnostic information can help maintenance teams identify problems more quickly.

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25.8 Centralized Control Compatibility

The no-HIM configuration is useful where the drive is operated through a centralized HMI, PLC, DCS, or SCADA architecture.

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25.9 Industrial-Scale Construction

The Frame 10, 600 mm deep MCC-style configuration is designed for large industrial electrical installations.

It is not intended to be treated like a small machine-mounted inverter.

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26. Mechanical Parameters

Important Dimension and Weight Note

For this high-power Frame 10 model, the 600 mm depth is a reliable mechanical reference for the catalog configuration.

The complete height and width depend on the actual mechanical package and installation arrangement.

The exact weight in kg should likewise be taken from the physical assembly rather than estimated from an electrically similar model.

Some commercial listings provide generic dimensions or weights that do not match the complete Frame 10 MCC-style assembly. Those values should not be used for cabinet design, transportation, crane selection, or floor-loading calculations without verification.

For engineering purposes, the correct procedure is to use the dimensional drawing and actual equipment nameplate for the final installation.

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27. Five Recommended Models From the Same Series

The following models are useful alternatives within the PowerFlex 755 family.

Model Selection Logic

The 20G11BC1K5JN0NNNNN is one of the closest alternatives to the target model.

The 20G11BC1K4JN0NNNNN provides a slightly lower current class and is appropriate where the motor requirement is below the 1,590 A range.

The 20G11BC2K1JN0NNNNN is a significantly larger alternative and should be considered when additional current and power capacity are required.

The lower-rated 20G11BC1K1JN0NNNNN and 20G11BC1K2JN0NNNNN are more suitable when the motor is smaller.

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28. Same-Series Model Comparison

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29. Five Related Same-Brand Models

For a broader comparison, the following models are useful choices from the same brand and related industrial drive range.

These models are particularly useful when selecting a drive according to actual motor current.

For example, choosing a smaller model when the motor current is significantly below 1,590 A can avoid unnecessary oversizing.

On the other hand, if the motor is close to the upper current limit, the Frame 10 20G11BC1K6JN0NNNNN provides greater capacity.

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30. Application Suitability

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31. Pump Application Advantages

For large centrifugal pumps, the drive can provide considerable operational flexibility.

Instead of running the pump continuously at maximum speed, the drive can adjust speed according to actual process requirements.

This can be useful for:

• Flow regulation
• Pressure regulation
• Water-level control
• Process control
• Energy management

The integrated PID capability can allow the drive to respond automatically to a process feedback signal.

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32. Fan Application Advantages

Large fans frequently operate under variable demand.

A fixed-speed motor may operate at full speed even when the process requires less airflow.

A variable-speed drive can adjust the motor speed.

This can improve:

• Airflow control
• Process stability
• Energy efficiency
• Equipment operation
• Start/stop performance

The benefit can be especially significant for large fans because the motor power is substantial.

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33. Conveyor Application Advantages

For conveyor systems, controlled acceleration is often as important as speed regulation.

A large conveyor may have substantial inertia.

A controlled acceleration ramp can reduce mechanical shock.

Potential benefits include:

• Reduced belt stress
• Reduced gearbox stress
• Reduced coupling stress
• Reduced shaft stress
• Smoother starting
• Better material flow
• Controlled stopping

For long conveyor systems, the ability to control speed can also help coordinate several sections of the material-handling process.

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34. Mining Application Advantages

Mining equipment is frequently required to operate continuously under demanding conditions.

The high current rating of the drive makes it suitable for large mining motors.

The drive can also communicate with the plant automation system.

This allows operators to monitor:

• Motor current
• Drive status
• Fault conditions
• Speed
• Process information

This can be particularly useful in large mining installations where equipment is distributed over a large area.

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35. Process-Control Advantages

The PID control characteristic is useful in applications where motor speed needs to respond to a measured process variable.

For example:

Pressure control

The drive can adjust pump speed to maintain a target pressure.

Flow control

The motor speed can be adjusted according to the required flow.

Air-pressure control

A blower can be regulated to maintain a desired pressure.

Temperature-related control

Fans or pumps can be adjusted according to a temperature-control strategy.

This allows the drive to participate directly in process regulation.

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36. Energy Management

Variable-speed operation can reduce energy consumption in appropriate applications.

This is particularly relevant to centrifugal pumps and fans.

When process demand falls, the motor does not necessarily need to continue running at maximum speed.

The drive can reduce speed to match actual demand.

This can provide:

• Lower operating energy
• Reduced mechanical stress
• Improved process control
• Less unnecessary flow
• Less unnecessary airflow
• Reduced wear

The actual energy savings depend heavily on the load type and operating profile.

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37. Cooling Requirements

A drive with approximately 900–1,000 kW power capability produces substantial heat.

The unit uses forced-air cooling.

The installation should therefore provide sufficient:

• Airflow
• Ventilation
• Heat removal
• Service clearance
• Environmental control

Dust is another important consideration.

Dust accumulation on cooling components can reduce airflow and heat-transfer performance.

The electrical room should therefore be designed for the environmental conditions of the facility.

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38. Environmental Conditions

IP20 means the drive should not be treated as a weatherproof outdoor enclosure.

If the installation environment is dusty, wet, corrosive, or otherwise harsh, an appropriate enclosure and environmental-control strategy may be required.

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39. Installation Considerations

The 600 mm deep MCC-style configuration is a major mechanical consideration.

The drive should be installed with sufficient room for:

• Incoming power connections
• Motor connections
• Control wiring
• Network cables
• Cooling airflow
• Maintenance
• Inspection
• Grounding
• Service access

The actual height and width of the final assembly should be confirmed before preparing the installation location.

This is especially important because a high-power Frame 10 drive is substantially larger than a small standalone VFD.

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40. Maintenance Considerations

For a high-power industrial drive, preventive maintenance is important.

Maintenance personnel should pay attention to:

• Cooling fans
• Air passages
• Power connections
• Control connections
• Grounding
• Network connections
• Cabinet cleanliness
• Ambient temperature
• Fault history
• Parameter settings
• DC-bus condition

The cooling system is particularly important.

High-power semiconductor devices generate significant heat, and proper airflow helps maintain acceptable operating temperatures.

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41. Transportation and Weight

The drive should be treated as heavy industrial electrical equipment.

The exact equipment mass depends on the physical configuration.

The following should be considered before transportation:

• Floor loading
• Forklift capacity
• Crane capacity
• Lifting points
• Shipping package
• Installation location
• Access doors
• Elevator capacity
• MCC construction
• Final cabinet assembly

Because different mechanical configurations can have different weights, the actual nameplate and mechanical drawing should be used for the final kilogram value.

This is preferable to using an unreliable generic online weight figure for a Frame 10 high-power assembly.

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42. Complete Parameter Table

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43. Key Advantages at a Glance

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44. Overall Product Assessment

The 20G11BC1K6JN0NNNNN is a high-power industrial AC drive intended for applications where a conventional small or medium-sized VFD would not provide enough current or power.

Its 1,590 A nominal output current is the most important electrical characteristic.

Combined with the 1,000 kW Light Duty, 900 kW Normal Duty, and 710 kW Heavy Duty ratings, this makes the model suitable for very large motor systems.

The Frame 10 construction places it in the larger end of the PowerFlex 755 platform.

The 600 mm deep MCC-style construction is intended for industrial electrical installations rather than compact machine mounting.

The embedded EtherNet/IP interface makes the drive particularly suitable for automated plants where motor control needs to be integrated into a PLC, HMI, SCADA, or other supervisory system.

The PID capability is useful for pumps, fans, blowers, and other process applications where motor speed needs to respond automatically to pressure, flow, or another process variable.

The no-HIM configuration is appropriate for centralized-control installations where operators do not normally interact directly with the drive.

The integrated filtering and CM-jumper configuration are also important when considering EMC and system-level electrical design.

For pump and fan applications, variable-speed operation can provide improved process control and potentially significant energy savings.

For conveyors and mining machinery, controlled acceleration can help reduce mechanical shock.

For cement, mineral-processing, metals, and other heavy industries, the high-current capability allows the drive to control very large motors.

The main engineering considerations are motor current, motor voltage, duty classification, overload requirement, acceleration and deceleration profile, braking requirements, cooling, ambient temperature, cabinet ventilation, electrical protection, cable sizing, and physical installation space.

The 600 mm depth should be used as an important mechanical reference.

For the complete height, width, overall footprint, and especially the exact weight in kg, the final physical configuration should be checked before installation or transportation. A generic weight from an unrelated listing should not be substituted for the actual Frame 10 assembly weight.

Overall, the 20G11BC1K6JN0NNNNN is a strong choice for large pumps, high-power fans, blowers, mining conveyors, bulk-material handling systems, cement equipment, mineral-processing machinery, metals-processing equipment, and other large industrial motor applications where high current, high power, process control, and industrial networking are required.