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Allen-Bradley 20G11BC910AN2NNNNN — Detailed Product Specification, Introduction, Applications, Advantages and Related Model Guide

1. Product Overview

The 20G11BC910AN2NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for large industrial motor-control applications.

It is a 400 VAC, three-phase drive with an output-current rating of approximately 910 A. The published duty ratings are approximately 560 kW Light Duty, 500 kW Normal Duty, and 400 kW Heavy Duty.

The unit uses a Frame 9 architecture with an IP20 / Type 1, 600 mm deep MCC-style construction and forced-air cooling.

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

One important distinction is the AN2 configuration. This catalog number is a specific configuration of the 20G11BC910 platform, so it should not be treated as interchangeable with other 20G11BC910 models simply because the voltage, current, and frame are similar.

The model is particularly suitable for large pumps, fans, blowers, conveyors, material-handling equipment, mining systems, cement equipment, process machinery, and other large industrial motor applications.

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2. Brand and Product Series

The PowerFlex 755 series is intended for industrial applications where a simple fixed-speed motor starter is not sufficient.

It provides variable-speed motor control together with communication, diagnostics, process-control functions, feedback capability, and flexible integration into industrial automation systems.

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3. Main Technical Parameters

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4. Electrical Rating

The 20G11BC910AN2NNNNN has a nominal output current of approximately 910 A.

This is a substantial current rating and places the unit firmly in the high-power industrial-drive category.

The three principal duty classifications are:

The duty classification is important when selecting the drive.

A motor application should not be selected simply by looking at the largest kW number.

For example, a centrifugal pump may be suitable for the Light Duty rating, while a conveyor with high starting torque may need to be evaluated against the Heavy Duty rating.

The motor’s actual full-load current and operating profile should always be considered.

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5. 910 A Output Current

The 910 A output current is one of the most important characteristics of the model.

This current capacity allows the drive to control large industrial motors that are well beyond the range of compact machine-mounted VFDs.

Typical applications include:

• Large water pumps
• Cooling-water pumps
• Process pumps
• Industrial fans
• Large blowers
• Conveyors
• Mining equipment
• Cement machinery
• Mineral-processing equipment
• Material-handling systems
• Large ventilation systems
• Heavy industrial machinery

The associated electrical system must be designed for the current level.

Particular attention should be given to transformer sizing, incoming switchgear, protective devices, busbars, motor cables, grounding, short-circuit protection, and thermal management.

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6. Light Duty Rating — 560 kW

The 560 kW Light Duty rating is the highest published power rating for this model.

Light Duty is generally more appropriate for loads with moderate overload requirements.

Typical examples include:

• Centrifugal pumps
• Large cooling pumps
• Large fans
• Ventilation systems
• Industrial blowers
• Water circulation systems

Variable-speed operation can provide significant process-control benefits in these applications.

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7. Normal Duty Rating — 500 kW

The 500 kW Normal Duty rating is suitable for many general industrial applications.

Potential applications include:

• Large process motors
• Pumps
• Fans
• Blowers
• Material-handling systems
• Manufacturing equipment
• Industrial auxiliary machinery

Normal Duty should be selected according to the motor’s actual current and load requirements rather than simply its nameplate power.

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8. Heavy Duty Rating — 400 kW

The 400 kW Heavy Duty rating is particularly relevant when the motor is exposed to greater torque requirements or more severe overload conditions.

Typical applications may include:

• Heavy conveyors
• Mining conveyors
• Material-handling equipment
• High-inertia machinery
• Processing equipment
• Heavy industrial machinery

When acceleration torque is significant, Heavy Duty selection becomes more important than simply looking at the maximum Light Duty kW rating.

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9. Product Introduction

The 20G11BC910AN2NNNNN is a high-power variable frequency drive designed to control the speed and torque of a large AC motor.

Instead of allowing the motor to operate only at the fixed electrical frequency of the incoming supply, the drive generates a controlled output.

This allows the motor to:

• Start smoothly
• Accelerate gradually
• Run at variable speed
• Respond to process requirements
• Decelerate under controlled conditions
• Stop according to programmed requirements
• Communicate operating information to a control system

For large motors, controlled acceleration can be especially valuable because direct starting can result in high electrical current and substantial mechanical stress.

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10. PowerFlex 755 Series Characteristics

The PowerFlex 755 platform is designed for demanding industrial applications.

It supports functions associated with:

• Speed control
• Torque control
• Motor feedback
• Process PID
• Industrial networking
• Diagnostics
• Safety functions
• I/O expansion
• Application-specific control

This makes the series suitable for both straightforward variable-speed applications and more advanced automated machinery.

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11. Embedded EtherNet/IP

The model includes embedded EtherNet/IP communication.

This allows it to exchange commands and operating data with a plant automation system.

Typical information can include:

For large industrial plants, this type of integration can significantly simplify centralized monitoring.

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12. Blank / No-HIM Configuration

The model uses a blank / no-HIM configuration.

HIM stands for Human Interface Module.

A local HIM is normally used for:

• Parameter configuration
• Local start and stop
• Status monitoring
• Fault display
• Basic troubleshooting

A no-HIM arrangement is useful when the drive is installed in an electrical room and controlled from another location.

For example, the operator may control the motor through:

• PLC
• HMI
• SCADA
• Central control room
• Distributed control system

This approach is common in large automated facilities.

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13. AC Input With Precharge

The drive uses AC input with precharge.

A high-power VFD contains a substantial DC-link capacitor bank.

When the drive is energized, the capacitors need to charge.

The precharge circuit manages this initial charging process and limits the initial inrush current.

This is especially important for a drive with a 910 A output rating.

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14. DC Terminals

The drive includes DC terminals.

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

DC terminals can also be useful in certain compatible DC-bus arrangements.

Any external DC-bus application should be evaluated as a complete system, including protection, voltage compatibility, grounding, fault behavior, and energy management.

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15. Filtering

The model is configured with filtering.

Power electronic switching naturally creates high-frequency electrical components.

Filtering helps manage electromagnetic interference.

However, good EMC performance also depends on:

• Grounding
• Bonding
• Shielding
• Motor cable selection
• Cable routing
• Cable length
• Cabinet construction
• Network cable routing

The filter therefore forms part of the complete EMC installation rather than acting as a standalone solution.

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16. AN2 Configuration

The AN2 suffix is an important part of the catalog number.

It identifies a specific configuration of the drive.

This means that 20G11BC910AN2NNNNN, 20G11BC910AN0NNNNN, and 20G11BC910JN2NNNNN should not automatically be considered identical replacement products.

Even when they share:

• 400 VAC input
• 910 A output
• Frame 9
• 600 mm MCC construction

their detailed configuration can differ.

For replacement work, the complete catalog number should therefore be checked character by character.

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17. Dynamic Braking

The model does not include an integrated dynamic-braking transistor.

This is important for machines with significant rotating inertia.

During deceleration, the motor can return energy to the drive’s DC bus.

If the motor is stopped rapidly, the regenerated energy can raise the DC-bus voltage.

Depending on the application, the system may require:

• Dynamic braking equipment
• Regenerative braking
• Longer deceleration ramps
• Mechanical braking
• Other energy-management methods

This is especially important for large conveyors, high-inertia fans, and heavy rotating machinery.

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18. Mechanical Parameters

The drive uses a Frame 9, IP20 / Type 1, 600 mm deep MCC-style construction.

Dimension and Weight Consideration

The 600 mm depth is the most useful fixed mechanical reference for the MCC-style configuration.

The complete physical dimensions are dependent on the actual cabinet and option arrangement.

For that reason, the height and width should not be treated as universal values for every assembled configuration.

The same principle applies to weight.

For a large Frame 9 drive, the actual mass can vary with cabinet construction and installed options.

For lifting, transportation, floor-loading calculations, and installation planning, the final equipment weight in kg should be taken from the actual mechanical assembly rather than estimated from the catalog family.

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19. Product Applications

19.1 Large Water Pumps

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

Possible installations include:

• Water-treatment plants
• Industrial water systems
• Cooling-water systems
• Process-water systems
• Wastewater systems
• Mining dewatering
• Utility pumping
• Large circulation systems

Variable-speed control allows the pump to match actual process demand.

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20. Process Pumps

Process pumps often need accurate flow or pressure regulation.

The drive can adjust motor speed based on a process reference.

This can help provide:

• Stable pressure
• Controlled flow
• Smooth starting
• Reduced mechanical shock
• Automatic process adjustment
• Centralized monitoring

The integrated PID function is particularly useful in this type of application.

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21. Large Industrial Fans

Large fans can require hundreds of kilowatts of motor power.

Potential applications include:

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

The drive can vary fan speed according to process demand.

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22. Large Blowers

Large blowers can also benefit from variable-speed control.

The drive can regulate blower speed according to:

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

A PID loop can automatically adjust speed to maintain a target process value.

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23. Conveyor Systems

The 20G11BC910AN2NNNNN can be used for large conveyor systems when the motor’s current and duty requirements are within the drive’s rating.

Conveyor systems can have substantial inertia.

A controlled acceleration profile can help reduce mechanical shock.

Potential benefits include:

• Smoother starting
• Reduced belt stress
• Reduced gearbox stress
• Reduced coupling stress
• Reduced shaft stress
• Better material handling
• Controlled stopping
• Adjustable conveyor speed

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24. Mining Applications

The high current rating makes the drive suitable for many large mining applications.

Potential applications include:

• Ore conveyors
• Bulk-material conveyors
• Dewatering pumps
• Mine ventilation fans
• Material-transfer systems
• Mineral-processing equipment

The drive can provide centralized communication and monitoring in large automated mining systems.

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25. Cement Industry Applications

Large cement facilities use many high-power motors.

Potential applications include:

• Process fans
• Cooling fans
• Large pumps
• Conveyors
• Material-handling equipment
• Ventilation
• Process machinery

Variable-speed control can help equipment respond to changes in production requirements.

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26. Mineral Processing

Mineral-processing plants frequently use large motors for:

• Pumping
• Conveying
• Ventilation
• Blowing
• Material handling
• Process equipment

The drive’s high current capacity and industrial communication capabilities make it suitable for centralized control architectures.

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27. Heavy Manufacturing

The drive can also be considered for heavy industrial manufacturing equipment.

Potential applications include:

• Large cooling systems
• Process fans
• Large pumps
• Material handling
• Rotating equipment
• Auxiliary machinery

The exact suitability depends on the motor’s current and torque requirements.

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28. Main Product Advantages

28.1 High 910 A Output Current

The 910 A output rating gives the drive enough capacity for large industrial motors.

This is one of its strongest advantages.

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28.2 560 kW Light Duty Rating

The 560 kW Light Duty capability makes the drive particularly attractive for large variable-torque loads.

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28.3 500 kW Normal Duty Rating

The 500 kW Normal Duty rating provides substantial continuous industrial capacity.

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28.4 400 kW Heavy Duty Rating

The 400 kW Heavy Duty rating provides a useful capacity for applications with greater torque and overload demands.

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28.5 Embedded EtherNet/IP

The integrated network interface allows the drive to become part of the plant’s automation infrastructure.

This can simplify:

• Remote control
• Status monitoring
• Fault monitoring
• Data collection
• Process integration

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28.6 PID Control

PID capability is valuable for:

• Pump pressure control
• Flow regulation
• Fan control
• Blower pressure control
• Process regulation

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28.7 No-HIM Configuration

The no-HIM design is useful for centralized-control installations.

Operators can control and monitor the drive through a remote HMI or control system.

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28.8 Forced-Air Cooling

Forced-air cooling is practical for large industrial electrical installations when the electrical room has adequate ventilation.

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28.9 MCC-Style Construction

The 600 mm deep MCC-style configuration is designed for industrial electrical-room integration.

It is much more suitable for large plant installations than compact machine-mounted drives.

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28.10 Flexible PowerFlex 755 Platform

The PowerFlex 755 architecture supports a broad range of motor-control and industrial automation requirements.

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29. Five Recommended Models From the Same Series

The following five models are useful comparison choices within the same PowerFlex 755 family.

These are useful choices when the motor requirement is higher than the 910 A class.

The models progress toward larger current and power capabilities.

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30. Same-Series Comparison

This table shows the progression from the 910 A model toward substantially larger high-power drives.

The target model is the most compact electrical choice in this group while still providing a very substantial 910 A output.

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31. Five Same-Brand Popular / Related Models

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

The first four are especially useful when the application uses a 400 VAC motor system.

The 480 VAC model is more relevant where the plant’s motor and distribution voltage are based on 480 VAC.

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32. Application Selection Table

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33. Pump Application Advantages

For a large centrifugal pump, variable-speed control can be considerably more flexible than fixed-speed operation.

The drive can change motor speed to match actual process demand.

Potential benefits include:

• Better pressure control
• Better flow control
• Reduced throttling
• Smoother motor starting
• Lower mechanical shock
• Potential energy savings
• Remote monitoring

The PID function can be used to maintain a target pressure or flow value.

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34. Fan and Blower Applications

Large fans and blowers often operate for long periods.

Operating continuously at maximum speed may not always be necessary.

The drive can reduce speed when process demand is lower.

Potential benefits include:

• Better airflow control
• Reduced unnecessary operation
• Smoother starting
• Lower mechanical stress
• Automatic process response
• Centralized monitoring

This makes the drive particularly useful in large ventilation and process-air systems.

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35. Conveyor Applications

For conveyors, the major benefit is often mechanical control rather than simply energy reduction.

A controlled acceleration ramp can reduce sudden torque transmission through the mechanical system.

This can help reduce stress on:

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

The drive can also allow conveyor speed to be adjusted according to production requirements.

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36. Mining Applications

Mining equipment can experience large and rapidly changing loads.

The drive provides substantial current capacity while allowing speed and acceleration to be controlled.

Potential applications include:

• Ore handling
• Long conveyors
• Dewatering
• Ventilation
• Mineral processing
• Bulk material handling

Communication capabilities are also useful when equipment must be monitored from a centralized control room.

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37. Process Control

The drive’s PID functionality can be particularly valuable in process industries.

A simple pressure-control system can operate as:

Pressure Sensor → PID Controller → Drive → Motor → Pump → Process

When pressure decreases, the drive can increase motor speed.

When pressure increases, the drive can reduce motor speed.

This provides automatic process regulation without requiring the motor to run continuously at full speed.

Similar control concepts can be used for:

• Flow
• Air pressure
• Vacuum
• Process-related variables

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38. Energy Management

Variable-speed control can provide significant energy-management benefits for suitable applications.

This is particularly relevant to centrifugal pumps and fans.

If the process requires less flow or airflow, the motor can operate at a lower speed.

The actual energy savings depend on:

• Load characteristics
• Operating hours
• Required speed range
• System resistance
• Motor efficiency
• Drive efficiency
• Process requirements

Therefore, the actual project should be evaluated using the application’s load profile rather than relying on a generic savings percentage.

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39. Cooling Requirements

The drive uses forced-air cooling.

A drive of this size can generate substantial heat during operation.

The electrical room therefore needs suitable ventilation and heat-removal capacity.

Important factors include:

• Ambient temperature
• Airflow
• Fan condition
• Cabinet ventilation
• Dust accumulation
• Air filters
• Service clearance
• Installation altitude

Maintaining clean airflow paths is important for long-term reliability.

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40. Environmental Characteristics

The IP20 / Type 1 construction should be installed in an appropriate controlled electrical environment.

It should not be regarded as a weatherproof outdoor enclosure.

High humidity, conductive dust, corrosive gases, and water exposure should be considered during system design.

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41. Installation Considerations

The 600 mm MCC-style depth is an important mechanical characteristic.

However, the actual installation footprint is larger than the drive depth alone.

Space should be reserved for:

• Incoming power cables
• Motor cables
• Cable bending radius
• Control wiring
• Network wiring
• Ventilation
• Maintenance
• Inspection
• Component replacement
• Grounding

The actual cabinet layout should be based on the final mechanical configuration.

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42. Maintenance

Regular maintenance is important for a large industrial VFD.

Typical maintenance areas include:

• Cooling fans
• Air passages
• Electrical connections
• Grounding
• Cabinet cleanliness
• Network connections
• Fault history
• Warning history
• Parameter configuration
• Environmental conditions

Dust buildup can restrict airflow.

Loose electrical connections can produce additional heat.

Cooling-fan problems can also increase internal component temperatures.

Monitoring drive status and diagnostic information can therefore be an important part of preventive maintenance.

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43. Transportation and Weight

The 20G11BC910AN2NNNNN is a large Frame 9 industrial drive.

Its exact equipment weight depends on the physical configuration.

For installation planning, the actual equipment weight should be confirmed before transportation.

This is particularly important when the equipment will be installed on an elevated floor or inside a restricted electrical room.

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44. Complete Parameter Summary

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45. Advantages at a Glance

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46. Model Selection Guide

When selecting the 20G11BC910AN2NNNNN, the first item to check should be the motor’s full-load current.

The drive’s 910 A rating provides a clear electrical limit.

The second important factor is duty classification.

For a variable-torque pump or fan, the 560 kW Light Duty rating may be appropriate.

For a general industrial load, the 500 kW Normal Duty rating should be considered.

For a conveyor or other demanding mechanical load, the 400 kW Heavy Duty rating may be the relevant limitation.

The third consideration is braking.

Because this configuration does not include an integrated dynamic-braking transistor, high-inertia applications requiring rapid stopping need additional analysis.

The fourth consideration is the physical installation.

Frame 9 MCC-style equipment is considerably larger and heavier than compact VFDs.

The electrical room must provide adequate space for power cables, ventilation, maintenance, and equipment handling.

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47. Final Product Assessment

The 20G11BC910AN2NNNNN is a high-power PowerFlex 755 AC drive intended for large industrial motor-control applications.

Its 910 A output current, 560 kW Light Duty, 500 kW Normal Duty, and 400 kW Heavy Duty ratings make it suitable for a wide range of large motor applications.

The combination of high current and flexible control functions makes it especially useful for large pumps, fans, blowers, conveyors, mining equipment, cement machinery, mineral-processing systems, cooling systems, and material-handling equipment.

The embedded EtherNet/IP capability is a major advantage in modern automated plants.

It allows the drive to communicate with centralized control equipment and makes remote monitoring much easier.

The PID capability makes the drive particularly useful for process applications where pressure, flow, or another process variable must be maintained automatically.

The blank/no-HIM configuration is also well suited to electrical-room installations where the operator interface is located elsewhere.

The Frame 9, 600 mm deep MCC-style construction makes it appropriate for industrial electrical rooms and MCC-type installations rather than small machine-mounted applications.

The most important engineering considerations are motor full-load current, duty classification, torque requirements, acceleration, deceleration, braking energy, ambient temperature, cooling, installation space, cable sizing, protection, grounding, and communication requirements.

One mechanical point deserves special attention: the 600 mm depth is a useful catalog-level reference, but the complete height, width, and exact weight depend on the final physical configuration.

For this reason, the exact weight in kg should be confirmed from the actual assembled equipment before transportation, floor-loading calculations, lifting, or installation.

The model is also a discontinued configuration, so it is more appropriate for replacement, retrofit, maintenance, or existing-system matching than as the first choice for a completely new project.

For an existing installation, however, the exact catalog number can be extremely important because the AN2 configuration may contain option differences that are not obvious from the basic voltage and current ratings.

Overall, the 20G11BC910AN2NNNNN is best characterized as a high-current, 400 VAC, Frame 9, air-cooled PowerFlex 755 industrial AC drive, with approximately 910 A output capability and up to 560 kW Light Duty power, designed for large-scale variable-speed motor control where reliable process regulation, automation integration, diagnostics, and centralized operation are important.