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Allen-Bradley 20G11BD800AN0NNNNN — PowerFlex 755 Air-Cooled AC Drive

1. Product Overview

The 20G11BD800AN0NNNNN is a high-power PowerFlex 755 AC drive designed for industrial motor-speed and torque control.

It belongs to the PowerFlex 750-Series, specifically the PowerFlex 755 series. The model is intended for large three-phase AC motor applications where conventional small or medium-power variable-frequency drives are not sufficient.

The drive is designed for a 480 VAC, three-phase electrical system and provides an output capacity of approximately 800 A.

Its published duty ratings are approximately 800 HP Light Duty, 700 HP Normal Duty and 600 HP Heavy Duty.

This places the 20G11BD800AN0NNNNN in the large industrial-drive category. It is suitable for substantial pumps, fans, blowers, conveyors, material-handling machinery and other large motor-driven equipment.

The model uses Frame 9 construction and is associated with a Type 1, IP20, 600 mm deep MCC-style package. It uses forced-air cooling and is configured with an EMC filter and no internal dynamic-braking transistor.

The model is a particularly interesting choice when a project requires a high-power drive but does not need the considerably larger current capacity of the 1,000 A to 2,000 A-class PowerFlex 755 configurations.

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2. Brand and Product Series

Item	Specification
Model	20G11BD800AN0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Family Group	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	High-Power AC Variable Frequency Drive
Drive Type	Industrial AC Drive
Construction	Packaged / MCC Style
Cooling	Forced Air / Air Cooled
Input Voltage	480 VAC
Input Phase	3 Phase
Rated Output Current	800 A
Light-Duty Rating	800 HP
Normal-Duty Rating	700 HP
Heavy-Duty Rating	600 HP
Frame	Frame 9
Enclosure	Type 1, IP20
Package Depth	600 mm
Dynamic Braking	None
EMC Filtering	Filtered
CM Jumper Configuration	Removed
Input Arrangement	AC Input with DC Terminals
HIM	Blank / No HIM
Typical Application	Large Industrial Motors
Approximate Weight	1,000 kg class for preliminary planning

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3. Main Technical Parameters

Parameter	Specification
Model	20G11BD800AN0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Series Group	PowerFlex 750-Series
Product Type	High-Power AC VFD
Input Voltage	480 VAC
Input Phase	3 Phase
Rated Output Current	800 A
Light-Duty Rating	800 HP
Normal-Duty Rating	700 HP
Heavy-Duty Rating	600 HP
Approx. LD Power	597 kW
Approx. ND Power	522 kW
Approx. HD Power	448 kW
Cooling	Forced Air / Air Cooled
Frame	Frame 9
Enclosure	Type 1, IP20
Package Style	600 mm Deep MCC Style
Depth	600 mm
Width	Configuration dependent
Height	Configuration dependent
Approx. Weight	1,000 kg class
Input Configuration	AC Input with DC Terminals
Dynamic Braking	None
EMC Filter	Included
CM Jumper	Removed
HIM	Blank / No HIM
Typical Motor Range	Large Industrial Motors
Typical Industries	Mining, Cement, Water, Metals, Manufacturing
Typical Loads	Pumps, Fans, Blowers, Conveyors, Material Handling

The horsepower-to-kilowatt figures above are approximate mechanical-power equivalents using 1 HP ≈ 0.746 kW.

The actual motor selection should always be based on motor voltage, rated current, duty cycle, overload requirement and application load rather than horsepower alone.

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4. Product Classification

The 20G11BD800AN0NNNNN is a large industrial variable-frequency drive.

It is substantially larger than compact machine drives such as small PowerFlex 525-class products.

At approximately 800 A, it is intended for motors with power requirements reaching several hundred kilowatts.

The model is particularly appropriate when a plant needs:

• High motor current capacity
• Variable-speed operation
• Controlled acceleration
• Controlled deceleration
• Adjustable torque
• Process speed regulation
• Industrial automation integration
• Continuous-duty operation
• High-power motor protection and monitoring

The drive is therefore better suited to centralized industrial installations than to small standalone machinery.

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5. 480 VAC Three-Phase Input

The 20G11BD800AN0NNNNN is designed for a 480 VAC three-phase electrical system.

480 VAC is a common industrial voltage level for large motors.

The incoming three-phase power is converted by the drive’s power electronics and supplied to the motor at a controlled voltage and frequency.

The drive therefore acts as the electrical interface between the industrial power system and the motor.

Because the model is rated at approximately 800 A, the complete electrical installation needs to be engineered as a high-current system.

Important areas include:

• Incoming switchgear
• Circuit protection
• Disconnect equipment
• Busbars
• Cable sizing
• Grounding
• Motor cable routing
• EMC control
• Thermal management
• Maintenance access
• Electrical clearances

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6. 800 A Current Rating

The approximately 800 A output-current rating is one of the defining characteristics of this model.

An 800 A drive is intended for large motors and heavy industrial equipment.

At this current level, the electrical installation is significantly different from that of a small VFD.

The current capacity makes the drive suitable for applications such as:

• Large centrifugal pumps
• Large process fans
• Industrial blowers
• Large conveyors
• Mining equipment
• Cement-process equipment
• Water-transfer equipment
• Large material-handling systems
• Heavy industrial machinery

The actual motor compatibility must be confirmed using the motor’s rated current and the required overload characteristics.

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7. Horsepower Ratings

The model provides three important duty ratings.

Duty Rating	Horsepower	Approx. kW
Light Duty	800 HP	597 kW
Normal Duty	700 HP	522 kW
Heavy Duty	600 HP	448 kW

These ratings allow the same basic drive platform to be applied to different types of industrial loads.

The difference between Light Duty, Normal Duty and Heavy Duty is important because different machines impose different thermal and overload requirements.

A centrifugal fan may have a relatively predictable load profile.

A conveyor carrying heavy material may have substantially more demanding acceleration and torque requirements.

The final duty selection should therefore be based on the actual application rather than simply selecting the highest horsepower figure.

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8. Light-Duty Operation

The 800 HP Light Duty rating is the highest published horsepower rating for this configuration.

Light-duty applications are generally associated with loads where the motor does not require severe overload performance.

Typical examples include:

• Large centrifugal fans
• Large centrifugal pumps
• Process blowers
• Ventilation systems
• Cooling systems

These applications often have relatively predictable load characteristics.

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9. Normal-Duty Operation

The 700 HP Normal Duty rating provides a lower power rating with a different duty profile.

Normal Duty can be suitable for many general industrial loads.

Typical examples include:

• Industrial pumps
• Process fans
• Conveyors
• Blowers
• Material-handling systems
• General process machinery

The actual application should be checked against the drive’s current and overload specifications before selection.

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10. Heavy-Duty Operation

The 600 HP Heavy Duty rating is particularly important for applications involving more demanding torque or overload requirements.

Heavy-duty applications can involve:

• High starting torque
• High inertia
• Frequent acceleration
• Frequent deceleration
• Heavy mechanical loads
• Loaded conveyors
• Difficult starting conditions

Mining conveyors and heavy material-handling systems are typical examples where Heavy Duty selection may need to be considered.

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11. Approximate Power Conversion

The three duty ratings can be expressed approximately in kilowatts.

Duty	HP	Approx. Mechanical Power
Light Duty	800 HP	597 kW
Normal Duty	700 HP	522 kW
Heavy Duty	600 HP	448 kW

These values are approximate.

The actual electrical power consumed by the motor-drive system depends on motor efficiency, drive losses, power factor, operating speed and load.

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12. Product Introduction

The PowerFlex 755 platform is designed for industrial applications where motor control and process flexibility are important.

A conventional fixed-speed motor starter essentially controls whether the motor is running or stopped.

A variable-frequency drive provides considerably more control.

Motor speed can be adjusted.

Acceleration can be controlled.

Deceleration can be controlled.

Torque can be regulated according to the selected control method.

Operating conditions can be monitored.

The drive can also communicate with a larger industrial automation system.

For a large motor, these functions can improve the way the entire mechanical process operates.

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13. Basic Operating Principle

The general operating arrangement can be represented as:

480 VAC Three-Phase Supply

↓

20G11BD800AN0NNNNN

↓

Controlled AC Output

↓

Large AC Motor

↓

Mechanical Equipment

↓

Industrial Process

The drive regulates the electrical power delivered to the motor.

The output frequency and voltage are adjusted according to the motor-control strategy.

The result is variable motor speed and controlled torque.

This allows the motor to operate according to process demand instead of continuously operating at one fixed speed.

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14. Variable-Speed Motor Control

Variable-speed operation is one of the major advantages of the 20G11BD800AN0NNNNN.

Many industrial processes do not require full motor speed at all times.

A pump may only need part of its maximum flow.

A fan may only need part of its maximum airflow.

A conveyor may need different speeds during different production stages.

A blower may need to maintain a specific process pressure.

The drive can adjust motor speed according to the process requirement.

This provides much greater flexibility than simple fixed-speed motor operation.

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15. Controlled Acceleration

Starting a large motor can create substantial mechanical and electrical stress.

The problem becomes more significant when the motor is connected to:

• Large shafts
• Gearboxes
• Heavy conveyor belts
• Large fan assemblies
• Pump impellers
• High-inertia rotating equipment
• Loaded machinery

The drive can increase motor speed according to a controlled acceleration profile.

This allows the machine to reach operating speed more gradually.

Potential benefits include:

• Reduced mechanical shock
• Reduced belt stress
• Reduced gearbox stress
• Smoother startup
• Reduced sudden torque changes
• Improved process control

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16. Controlled Deceleration

Stopping large equipment can also create challenges.

A large rotating system stores kinetic energy.

Stopping it too rapidly can place additional stress on mechanical components.

Controlled deceleration allows the speed to be reduced according to a defined profile.

This is particularly useful for:

• Conveyors
• Fans
• Blowers
• Pumps
• Material-handling equipment
• High-inertia machinery

The specific stopping strategy must be evaluated according to load inertia and braking requirements.

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17. Torque Control

Torque control is important for industrial machinery where load conditions vary.

A conveyor may start while carrying material.

A mining machine may experience changing resistance.

A large blower may experience process pressure changes.

A pump may experience changing hydraulic conditions.

The drive can regulate motor torque according to the selected control method.

This provides smoother interaction between the motor and the driven equipment.

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18. Process Speed Regulation

The drive can operate as part of a larger process-control system.

A typical arrangement can be:

Process Sensor

↓

PLC / Controller

↓

Speed or Torque Reference

↓

PowerFlex 755

↓

Motor

↓

Process Equipment

The process controller can change the motor reference according to actual process requirements.

This approach is common in automated pumping, ventilation, conveying and material-handling systems.

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19. Industrial Automation Integration

The PowerFlex 755 platform is designed for integration into industrial automation systems.

A large installation may include:

• PLC
• HMI
• Industrial network
• Process instrumentation
• Remote I/O
• Supervisory control
• Motor feedback

The drive can provide operating information such as:

• Output current
• Motor speed
• Operating frequency
• Drive status
• Alarm status
• Fault status
• Operating condition

This information can be useful for both operators and maintenance personnel.

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20. Mining Applications

Mining is an important application area for high-power drives.

Large mining operations use high-power motors for:

• Conveyors
• Ventilation
• Dewatering
• Material transfer
• Processing equipment
• Large pumps
• Blowers

Mining machinery can experience heavy mechanical loads and demanding operating conditions.

The 800 A capacity provides sufficient scale for many large mining motor applications.

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21. Mining Conveyor Applications

Large mining conveyors can contain significant mechanical inertia.

The complete system may include:

• Motor
• Gearbox
• Drive pulley
• Conveyor belt
• Rollers
• Loaded material

When the conveyor starts, all of these components must accelerate.

A variable-frequency drive can increase speed gradually instead of applying full operating speed immediately.

This can reduce mechanical shock and provide a more controlled startup.

For a long conveyor, this can be particularly valuable.

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22. Cement Industry Applications

Cement plants contain numerous large motor-driven systems.

The 20G11BD800AN0NNNNN can be considered for applications such as:

• Large process fans
• Blowers
• Material conveyors
• Large pumps
• Ventilation equipment
• Dust-control equipment
• Material-handling systems

Large fans are particularly suitable for variable-speed control because airflow requirements can change during production.

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23. Steel and Metals Applications

Steel and metals plants often use large motors in continuous processes.

Potential applications include:

• Cooling pumps
• Process fans
• Blowers
• Conveyors
• Material-handling systems
• Water circulation
• Ventilation equipment

The drive’s high current capacity allows it to operate substantial motors where process control and speed regulation are required.

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24. Water and Wastewater Applications

Large water systems often require high-power pumps.

Potential applications include:

• Raw-water pumping
• Water-transfer stations
• Industrial cooling water
• Large wastewater pumps
• Flood-control pumping
• Process-water systems

Variable-speed operation can allow pump output to follow actual system demand.

This can reduce the need to control flow solely through throttling.

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25. Large Pump Applications

Large centrifugal pumps are often well suited to variable-speed operation.

A pump may not need to operate at maximum flow continuously.

The drive can adjust motor speed according to the required flow or pressure.

Potential advantages include:

• Improved flow control
• Improved pressure control
• Reduced throttling
• Reduced mechanical stress
• Smoother starting
• Potential energy savings

The actual energy benefit depends on the pump curve, system curve and operating profile.

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26. Large Fan Applications

Large industrial fans can operate for thousands of hours.

If the required airflow changes, operating the motor continuously at full speed may not be necessary.

The drive can reduce fan speed according to process requirements.

Typical applications include:

• Mine ventilation
• Cement plants
• Industrial exhaust
• Dust collection
• Steel-process ventilation
• Cooling systems
• Combustion-air systems

This makes the PowerFlex 755 platform particularly useful for large variable-airflow applications.

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27. Blower Applications

Industrial blowers are used for many different processes.

Examples include:

• Aeration
• Combustion air
• Process air
• Pneumatic material transport
• Industrial ventilation
• Dust collection

The drive can adjust blower speed according to process pressure and flow requirements.

This allows the blower to operate more closely to actual process demand.

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28. Conveyor Applications

Large conveyors can be difficult to start and stop smoothly.

A conveyor can have considerable mechanical inertia, especially when it is long or loaded with material.

The 20G11BD800AN0NNNNN can provide controlled acceleration and deceleration.

This can help reduce:

• Belt shock
• Coupling stress
• Gearbox stress
• Mechanical vibration
• Sudden torque changes

The result can be smoother equipment operation.

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29. Material-Handling Applications

High-power material-handling systems often require precise speed control.

Applications can include:

• Bulk-material conveyors
• Mining transfer systems
• Cement material handling
• Port equipment
• Industrial transfer systems
• Large production conveyors

The drive can adjust motor speed according to the required production rate.

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30. Main Product Advantages

30.1 High Current Capacity

The approximately 800 A output rating allows the drive to control large industrial motors.

This is one of the main reasons to select this model rather than a compact drive.

30.2 Large Motor Capability

The 800 HP Light Duty rating makes the drive suitable for motors approaching the 600 kW range.

30.3 Variable-Speed Control

The motor can operate at different speeds instead of being restricted to fixed-speed operation.

30.4 Controlled Starting

The motor can accelerate according to a controlled profile.

30.5 Controlled Stopping

The drive can manage motor deceleration according to the selected operating strategy.

30.6 Process Flexibility

Motor speed can follow changing process requirements.

30.7 Industrial Automation Integration

The PowerFlex 755 platform is designed for integration with industrial control systems.

30.8 Air-Cooled Design

The forced-air configuration avoids the need for a dedicated liquid-cooling circuit.

30.9 Large Industrial Construction

Frame 9 and MCC-style packaging make the model appropriate for centralized electrical installations.

30.10 Broad Application Range

The same basic drive platform can be applied to pumps, fans, blowers, conveyors and other large industrial machines.

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31. EMC Filtering

The model configuration includes EMC filtering.

Electromagnetic compatibility is important in large industrial installations because the drive switches electrical power at high frequency.

Good system design should consider:

• Grounding
• Motor cable routing
• Shielding
• Control cable separation
• Communication cable routing
• Cabinet bonding
• Electrical clearances
• Cable length

The drive’s EMC configuration should be considered together with the complete installation rather than as an isolated component.

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32. Dynamic Braking

The specified configuration has no internal dynamic-braking transistor.

This is an important consideration when the application contains substantial inertia or requires rapid stopping.

The complete braking strategy should therefore be evaluated during system design.

Important factors include:

• Motor inertia
• Load inertia
• Deceleration time
• Regenerative energy
• Mechanical braking
• External braking equipment
• Emergency-stop requirements

A drive without an internal dynamic-braking transistor can still be used for many industrial applications, but the stopping method must be properly engineered.

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33. HIM Configuration

The model configuration is specified as Blank / No HIM.

This means that the drive is not configured with a local door-mounted Human Interface Module.

This can be useful in installations where operation and monitoring are handled through:

• PLC
• HMI
• Control room
• Industrial network
• Supervisory control system

Large industrial installations often centralize operator control rather than relying on a local keypad.

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34. Mechanical Construction

The drive uses Frame 9 construction.

The packaged configuration is associated with a Type 1, IP20, 600 mm deep MCC-style enclosure.

This makes the equipment significantly different from a small wall-mounted inverter.

Installation planning must account for:

• Cabinet footprint
• Cable access
• Ventilation
• Service clearance
• Electrical clearances
• Floor loading
• Transportation
• Lifting
• Maintenance

The 600 mm dimension describes the package depth and should not be interpreted as the complete installation clearance.

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35. Dimensions

The known package depth is approximately 600 mm.

The exact overall height and width should be taken from the final mechanical drawing for the specific configuration.

Because this is a large packaged drive, the overall mechanical envelope can depend on the final arrangement and options.

Mechanical Parameter	Specification
Model	20G11BD800AN0NNNNN
Frame	Frame 9
Enclosure	Type 1, IP20
Package Style	MCC Style
Depth	600 mm
Width	Configuration dependent
Height	Configuration dependent
Cooling	Forced Air
Installation	Floor / MCC / Electrical Room
Cable Access	Required
Service Clearance	Required
Ventilation	Required
Lifting Access	Required

For engineering drawings, the exact configured dimensions should be used rather than estimating the height or width.

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36. Weight

The 20G11BD800AN0NNNNN is a large industrial drive.

For preliminary planning, it is reasonable to treat the complete packaged equipment as being in the 1,000 kg class.

However, the exact net weight and shipping weight can vary with the final enclosure and option configuration.

Therefore, the weight below should be treated as a planning-level estimate rather than a certified lifting weight.

Weight Parameter	Specification
Model	20G11BD800AN0NNNNN
Approx. Equipment Weight	1,000 kg class
Exact Net Weight	Configuration dependent
Shipping Weight	Configuration dependent and higher than net weight
Floor Loading	Must be evaluated
Lifting	Heavy-duty lifting equipment required
Transportation	Heavy-equipment handling required
Installation	Industrial floor / MCC installation

For a real installation, the final equipment drawing, packing information and nameplate should be used for confirmed weight.

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37. Cooling and Thermal Management

The drive uses forced-air cooling.

An 800 A drive can generate considerable heat during operation.

Adequate airflow is therefore an important part of the installation.

The electrical room should provide suitable ventilation and heat removal.

Maintenance personnel should periodically inspect:

• Cooling fans
• Air passages
• Air intake areas
• Exhaust areas
• Dust accumulation
• Cabinet ventilation
• Ambient temperature
• Abnormal temperature conditions

Dust accumulation can be particularly problematic in mining, cement and bulk-material environments.

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38. Electrical Installation Requirements

The 800 A rating requires careful electrical engineering.

Installation Area	Main Consideration
Input Voltage	480 VAC
Input Phase	3 Phase
Drive Current	800 A
Circuit Protection	Properly rated and coordinated
Disconnect	Properly rated
Busbars	High-current design
Incoming Conductors	High-current sizing
Motor Conductors	High-current sizing
Grounding	Proper industrial grounding
EMC	System-level design
Cooling	High priority
Heat Dissipation	Must be calculated
Cabinet Space	Large
Service Clearance	Required
Floor Loading	Must be evaluated
Lifting	Heavy-duty handling

At 800 A, electrical connection quality is extremely important.

Loose connections, inadequate conductor sizing or insufficient thermal management can cause significant problems.

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39. Energy-Saving Potential

Variable-speed operation can create significant energy-saving opportunities in the right applications.

This is especially relevant to centrifugal pumps and fans.

If process demand falls, the motor does not necessarily need to continue operating at full speed.

The drive can reduce motor speed to match actual requirements.

Potential benefits include:

• Lower energy consumption
• Reduced throttling
• Improved flow control
• Improved pressure control
• Reduced mechanical stress
• Reduced unnecessary full-speed operation

Actual savings depend on the machine characteristics and operating profile.

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40. Maintenance Considerations

A high-power drive should be included in a formal maintenance program.

Maintenance Area	Recommended Attention
Cooling Fans	Check operation, noise and condition
Airflow	Keep passages clear
Cabinet	Inspect for dust
Power Connections	Check for heat and looseness
Grounding	Verify grounding condition
Motor Cables	Inspect connections
Control Wiring	Check connections
Communication	Monitor network condition
Fault History	Review regularly
Temperature	Monitor abnormal conditions
Environment	Check dust, heat and moisture
Mechanical Condition	Inspect cabinet and mounting

For an air-cooled drive, maintaining adequate airflow is one of the most important routine maintenance activities.

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41. Environmental Considerations

The installation environment should be evaluated before commissioning.

Important factors include:

• Ambient temperature
• Dust
• Humidity
• Corrosive gases
• Altitude
• Ventilation
• Vibration
• Water exposure
• Contamination

Mining and cement applications may expose electrical equipment to considerable dust.

Steel plants may involve high temperatures and airborne contaminants.

Water-treatment facilities may involve humidity and corrosive atmospheres.

The drive enclosure and surrounding electrical room should therefore be appropriate for the actual operating environment.

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42. Five Recommended Models from the Same Series

The following models are useful for comparison within the PowerFlex 755 high-power range.

No.	Model	Voltage	Current	LD	ND	HD	Frame	Cooling	Package Depth
1	20G11BD800AN0NNNNN	480 VAC	800 A	800 HP	700 HP	600 HP	9	Air	600 mm class
2	20G11BD1K2AN0NNNNN	480 VAC	1,135 A	1,100 HP	1,000 HP	800 HP	9	Air	600 mm class
3	20G11BD1K3AN0NNNNN	480 VAC	1,365 A	1,250 HP	1,100 HP	900 HP	9	Air	600 mm class
4	20G11BD1K5AN0NNNNN	480 VAC	1,525 A	1,500 HP	1,350 HP	1,100 HP	10	Air	600 mm
5	20G11BD2K0AN0NNNNN	480 VAC	2,070 A	2,000 HP	1,750 HP	1,650 HP	10	Air	600 mm

These models provide a useful progression in current and motor-power capacity.

The 20G11BD800AN0NNNNN is the smallest of these five high-power examples.

The 20G11BD2K0AN0NNNNN represents a much larger current class.

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43. Same-Series Model Comparison

Model	Current	LD	ND	HD	Voltage	Frame	Cooling	Depth	Approx. Weight
20G11BD800AN0NNNNN	800 A	800 HP	700 HP	600 HP	480 VAC	9	Air	600 mm class	1,000 kg class
20G11BD1K2AN0NNNNN	1,135 A	1,100 HP	1,000 HP	800 HP	480 VAC	9	Air	600 mm class	1,000 kg class
20G11BD1K3AN0NNNNN	1,365 A	1,250 HP	1,100 HP	900 HP	480 VAC	9	Air	600 mm class	1,000 kg class
20G11BD1K5AN0NNNNN	1,525 A	1,500 HP	1,350 HP	1,100 HP	480 VAC	10	Air	600 mm	1,000 kg class
20G11BD2K0AN0NNNNN	2,070 A	2,000 HP	1,750 HP	1,650 HP	480 VAC	10	Air	600 mm	1,000 kg class

The weight figures are preliminary planning values rather than certified shipping weights.

For purchasing, transportation or crane selection, the exact configured weight should always be confirmed.

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44. Five Same-Brand Popular / Related Models

The following models provide a useful comparison with other popular products from the same brand.

No.	Model	Series	Voltage Class	Relative Power Level	Typical Application
1	25B-D017N104	PowerFlex 525	480 VAC class	Small / Medium	General machinery
2	25C-D017N114	PowerFlex 527	480 VAC class	Small / Medium	Machine automation
3	20F11NC2P1JA0NNNNN	PowerFlex 753	480 VAC class	Medium / High	Industrial machinery
4	20G11NC2P1JA0NNNNN	PowerFlex 755	480 VAC class	High	Large industrial machinery
5	20G11BD800AN0NNNNN	PowerFlex 755	480 VAC	Very High	Large industrial motors

These products occupy different application and power ranges.

The PowerFlex 525 and PowerFlex 527 are much smaller than the 20G11BD800AN0NNNNN.

The PowerFlex 753 provides an industrial option for lower power requirements.

The PowerFlex 755 family is appropriate when the application requires more advanced control and significantly higher power.

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45. Same-Brand Detailed Comparison

Model	Series	Voltage	Application Level	Construction	Approx. Weight	Typical Use
25B-D017N104	PowerFlex 525	480 VAC class	Small / Medium	Compact	Low	Pumps, fans, conveyors
25C-D017N114	PowerFlex 527	480 VAC class	Small / Medium	Compact	Low	Machine automation
20F11NC2P1JA0NNNNN	PowerFlex 753	480 VAC class	Medium / High	Modular	Medium	Industrial machinery
20G11NC2P1JA0NNNNN	PowerFlex 755	480 VAC class	High	Modular	High	Large industrial machinery
20G11BD800AN0NNNNN	PowerFlex 755	480 VAC	Very High	MCC Style / Air Cooled	Approx. 1,000 kg class	Large industrial motors

The smaller products should not be considered direct substitutes for an 800 A drive.

The correct selection depends on the motor current, voltage, duty cycle and mechanical load.

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46. Application Suitability

Application	Suitability	Main Reason
Large Centrifugal Pumps	Excellent	High current and variable-speed operation
Large Fans	Excellent	Adjustable airflow
Large Blowers	Excellent	Process speed control
Large Conveyors	Excellent	Controlled acceleration
Mining Conveyors	Excellent	High-power motor control
Cement Equipment	Excellent	Large process motors
Steel and Metals	Excellent	High-power process machinery
Water Infrastructure	Excellent	Large pump control
Material Handling	Excellent	Speed and torque control
Heavy Industrial Machinery	Excellent	High-current capacity
Small Pumps	Excessive	Drive is substantially oversized
Small Fans	Excessive	Smaller drive is normally more suitable
Small Machines	Excessive	Current capacity is unnecessary

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47. Recommended Duty by Application

Application	Duty to Evaluate	Main Selection Factor
Large Centrifugal Pump	LD / ND	Continuous current
Large Industrial Fan	LD / ND	Fan load profile
Large Blower	LD / ND	Process load
Large Conveyor	ND / HD	Starting torque
Mining Conveyor	ND / HD	Inertia and material load
Heavy Material Handling	HD	Torque and acceleration
Large Water Pump	LD / ND	Flow and pressure
Cement Fan	LD / ND	Continuous operation
Heavy Process Machinery	ND / HD	Load profile
High-Inertia Machine	HD	Acceleration and deceleration

The final duty selection must be based on the actual motor current and application requirements.

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48. Why This Model Is Suitable for Large Pumps

Large pumps often operate under changing flow requirements.

The pump may not need maximum flow continuously.

With a variable-frequency drive, motor speed can be adjusted according to the required operating point.

This can provide:

• Better flow control
• Better pressure regulation
• Reduced throttling
• Smoother startup
• Reduced mechanical stress
• Potential energy savings

The 800 A capacity makes this model suitable for considerably larger pumping systems than compact industrial drives.

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49. Why This Model Is Suitable for Large Fans

Large industrial fans can consume substantial amounts of power.

The required airflow can change according to:

• Production rate
• Temperature
• Process pressure
• Ventilation requirements
• Dust-control requirements
• Combustion requirements

The drive can adjust fan speed according to actual demand.

This is particularly useful in:

• Mining
• Cement
• Steel
• Industrial ventilation
• Process cooling
• Dust-control systems

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50. Why This Model Is Suitable for Conveyors

Large conveyors require careful control during startup.

A loaded conveyor can have considerable inertia.

Starting the motor too aggressively can produce unnecessary mechanical stress.

The drive can provide a controlled acceleration profile.

This can improve:

• Belt starting behavior
• Gearbox loading
• Coupling loading
• Mechanical smoothness
• Process control
• Equipment life

For mining and bulk-material handling, these characteristics can be particularly valuable.

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51. Why This Model Is Suitable for Mining

Mining environments frequently use large motors.

Examples include:

• Conveyor drives
• Dewatering pumps
• Ventilation fans
• Blowers
• Processing equipment

The machinery may operate for long periods and under substantial mechanical loads.

The high-power PowerFlex 755 platform provides a suitable control architecture for these applications.

Environmental conditions still need to be evaluated carefully, particularly with respect to dust, temperature and ventilation.

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52. Why This Model Is Suitable for Cement

Cement plants rely heavily on large motor-driven equipment.

Fans and blowers are particularly important because they can operate continuously.

Large conveyors and pumps also require reliable motor control.

The 20G11BD800AN0NNNNN can be used where the motor current and duty requirements fall within its rating.

Its variable-speed capability can also help adapt equipment operation to changing process conditions.

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53. Why This Model Is Suitable for Steel and Metals

Steel and metals processing facilities can use large motors for:

• Cooling systems
• Water circulation
• Process fans
• Blowers
• Conveyors
• Material handling
• Auxiliary machinery

These applications often benefit from precise motor control and the ability to operate motors at different speeds.

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54. Why the Air-Cooled Configuration Is Useful

The forced-air design is practical for many industrial electrical rooms.

Compared with a liquid-cooled architecture, air cooling does not require a dedicated liquid-cooling circuit.

However, this does not mean the thermal requirements are low.

The electrical room must still remove the heat generated by the drive.

Adequate ventilation and proper fan maintenance remain essential.

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55. Procurement Checklist

Before purchasing or replacing the 20G11BD800AN0NNNNN, the following information should be checked.

Selection Item	Requirement
Drive Model	20G11BD800AN0NNNNN
Brand	Allen-Bradley
Product Series	PowerFlex 755
Input Voltage	480 VAC
Input Phase	3 Phase
Drive Current	800 A
Motor HP	Confirm actual motor
Motor Current	Confirm actual motor
Duty Cycle	Confirm
Starting Torque	Confirm
Acceleration Time	Confirm
Deceleration Time	Confirm
Load Inertia	Confirm
Braking Requirement	Confirm
Cooling	Forced Air
Frame	9
Enclosure	Type 1 / IP20
Depth	600 mm
Height	Confirm final configuration
Width	Confirm final configuration
Weight	Confirm final configuration
Communication	Confirm
Feedback	Confirm
Environmental Conditions	Confirm
Installation Space	Confirm

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56. Installation Space

The 600 mm package depth should not be treated as the complete installation footprint.

Additional space may be required for:

• Incoming power cables
• Motor cables
• Control wiring
• Ventilation
• Maintenance
• Door movement
• Electrical clearances
• Service access
• Lifting equipment

The electrical room layout should therefore be designed around the complete equipment assembly rather than only the cabinet depth.

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57. Weight and Transportation

The approximately 1,000 kg-class planning value means transportation should be treated as a heavy-equipment operation.

Before delivery, the site should evaluate:

• Truck access
• Door dimensions
• Floor strength
• Forklift capacity
• Crane capacity
• Lifting points
• Transportation route
• Final installation position
• Maintenance replacement route

The exact shipping weight should be confirmed before selecting lifting equipment.

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58. Product Selection Compared with Larger Models

The 20G11BD800AN0NNNNN occupies a useful position in the PowerFlex 755 high-power range.

A simple comparison is:

Model	Current	LD	ND	HD	Relative Size
20G11BD800AN0NNNNN	800 A	800 HP	700 HP	600 HP	Large
20G11BD1K2AN0NNNNN	1,135 A	1,100 HP	1,000 HP	800 HP	Very Large
20G11BD1K3AN0NNNNN	1,365 A	1,250 HP	1,100 HP	900 HP	Very Large
20G11BD1K5AN0NNNNN	1,525 A	1,500 HP	1,350 HP	1,100 HP	Extremely Large
20G11BD2K0AN0NNNNN	2,070 A	2,000 HP	1,750 HP	1,650 HP	Extremely Large

This makes the 20G11BD800AN0NNNNN a good starting point when the motor requirement is around the 600 to 800 HP range and a high-power industrial architecture is required.

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59. Why the Complete Catalog Number Matters

The complete model number identifies the specific drive configuration.

Two PowerFlex 755 models with similar current and horsepower ratings can have different options.

The differences can involve:

• EMC configuration
• Common-mode configuration
• Dynamic braking
• HIM
• Input arrangement
• Enclosure
• Packaging
• Other factory options

For this reason, 20G11BD800AN0NNNNN should be treated as a complete product identifier.

When purchasing a replacement, the entire catalog number should be checked against the existing nameplate.

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60. Replacement Consideration

This model has reached the discontinued stage, with a direct replacement configuration identified as:

20G11BD800JN0NNNNN

When replacing the older configuration, it is important not to assume that the replacement can simply be installed without engineering review.

The replacement evaluation should include:

• Input voltage
• Motor current
• Duty rating
• Motor horsepower
• Frame
• Cabinet dimensions
• Weight
• Cooling
• EMC configuration
• Braking requirements
• Communication
• Feedback
• Control architecture
• Existing drive parameters
• Installation clearances

The replacement should be treated as an engineering substitution rather than only a catalog-number substitution.

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61. Overall Advantages

The 20G11BD800AN0NNNNN offers a combination of high current capacity and flexible motor control.

Its most important advantage is the approximately 800 A output capacity.

The second major advantage is its 800 HP Light Duty rating, which makes it suitable for large industrial motors.

The third advantage is the PowerFlex 755 platform, which is designed for advanced industrial motor control and automation integration.

The fourth advantage is the forced-air cooling architecture, which is practical for many large electrical-room installations.

The fifth advantage is the broad range of applications.

The drive can be considered for:

• Large pumps
• Large fans
• Blowers
• Conveyors
• Mining equipment
• Cement equipment
• Steel-process equipment
• Water systems
• Material-handling machinery

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62. Overall Technical Assessment

The 20G11BD800AN0NNNNN is best classified as a large industrial PowerFlex 755 variable-frequency drive for high-power three-phase AC motors.

Its 800 A current rating gives it enough capacity for substantial industrial motors.

The 800 HP Light Duty, 700 HP Normal Duty and 600 HP Heavy Duty ratings provide flexibility for different application load profiles.

The 480 VAC three-phase input makes it appropriate for large industrial electrical systems.

The Frame 9, 600 mm deep MCC-style Type 1/IP20 package is intended for centralized industrial installations rather than compact machine mounting.

The forced-air cooling system provides a practical method of removing drive heat, but adequate ventilation and routine cooling-system maintenance are essential.

The model is particularly well suited to large pumps, fans, blowers, conveyors, mining systems, cement plants, steel facilities, water infrastructure and other heavy industrial applications.

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63. Final Technical Summary

Category	20G11BD800AN0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Series Group	PowerFlex 750-Series
Product Type	High-Power AC Variable Frequency Drive
Input Voltage	480 VAC
Input Phase	3 Phase
Output Current	800 A
Light Duty	800 HP
Normal Duty	700 HP
Heavy Duty	600 HP
LD Approx. Power	597 kW
ND Approx. Power	522 kW
HD Approx. Power	448 kW
Cooling	Forced Air / Air Cooled
Frame	Frame 9
Enclosure	Type 1, IP20
Package Style	600 mm Deep MCC Style
Depth	600 mm
Width	Configuration dependent
Height	Configuration dependent
Approx. Weight	1,000 kg class
Input Configuration	AC Input with DC Terminals
Dynamic Braking	None
EMC Filtering	Filtered
CM Jumper	Removed
HIM	Blank / No HIM
Typical Applications	Pumps, Fans, Blowers, Conveyors, Mining, Cement, Steel, Water
Installation Type	Large Industrial / MCC
Lifecycle	Discontinued configuration
Direct Replacement	20G11BD800JN0NNNNN

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64. Recommended Models Summary

Same-Series Recommendations

Model	Current	LD	ND	HD	Frame	Depth
20G11BD800AN0NNNNN	800 A	800 HP	700 HP	600 HP	9	600 mm class
20G11BD1K2AN0NNNNN	1,135 A	1,100 HP	1,000 HP	800 HP	9	600 mm class
20G11BD1K3AN0NNNNN	1,365 A	1,250 HP	1,100 HP	900 HP	9	600 mm class
20G11BD1K5AN0NNNNN	1,525 A	1,500 HP	1,350 HP	1,100 HP	10	600 mm
20G11BD2K0AN0NNNNN	2,070 A	2,000 HP	1,750 HP	1,650 HP	10	600 mm

Same-Brand Recommendations

Model	Series	Voltage Class	Relative Power	Typical Application
25B-D017N104	PowerFlex 525	480 VAC class	Small / Medium	General machinery
25C-D017N114	PowerFlex 527	480 VAC class	Small / Medium	Machine automation
20F11NC2P1JA0NNNNN	PowerFlex 753	480 VAC class	Medium / High	Industrial machinery
20G11NC2P1JA0NNNNN	PowerFlex 755	480 VAC class	High	Large industrial machinery
20G11BD800AN0NNNNN	PowerFlex 755	480 VAC	Very High	Large industrial motors

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65. Final Conclusion

The Allen-Bradley 20G11BD800AN0NNNNN is a large, high-power PowerFlex 755 AC drive intended for industrial motor applications where substantial current capacity, variable-speed operation and advanced motor control are required.

With an 800 A output rating and duty ratings of 800 HP Light Duty, 700 HP Normal Duty and 600 HP Heavy Duty, it occupies an important position in the high-power PowerFlex 755 range.

The drive is particularly suitable for large pumps, fans, blowers, conveyors, mining equipment, cement machinery, steel-process equipment, water systems and heavy material-handling equipment.

Its 480 VAC three-phase input, Frame 9 construction, 600 mm deep MCC-style package, forced-air cooling, EMC filtering and industrial control capabilities make it suitable for centralized electrical installations in large industrial facilities.

The most important selection points are the motor’s actual current, voltage, duty cycle, overload requirement, starting torque, acceleration requirements and mechanical load.

The approximate 1,000 kg-class equipment weight should be used only for preliminary planning. Exact height, width, net weight and shipping weight should be confirmed from the final configured mechanical documentation before installation, transportation or lifting.

For applications where an 800 A drive is sufficient, the 20G11BD800AN0NNNNN provides a strong high-power solution within the PowerFlex 755 family. For larger motors, the 1,135 A, 1,365 A, 1,525 A and 2,070 A variants provide progressively greater current and horsepower capability.