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1. Product Overview

The Allen-Bradley 20G11BD960AN4NNNNN is a high-power PowerFlex 755 AC Packaged Drive designed for large industrial motor-control applications.

It belongs to the PowerFlex 750-Series, specifically the PowerFlex 755 product family. This is a large-frame, air-cooled variable-frequency drive intended for demanding industrial installations where high motor current, substantial horsepower capacity, controlled acceleration and centralized automation are required.

The model is designed for a 480 VAC, three-phase power system and has a rated output current of 960 A. Its power capability places it in the range of very large industrial motors.

The AN4 configuration is important because it distinguishes this model from similar 960 A PowerFlex 755 catalog numbers. This configuration includes an Enhanced LCD HIM with full numeric keypad, making it different from the no-HIM versions of the same basic drive.

The model also uses AC input with precharge, EMC filtering, no internal dynamic-braking transistor, and a removed common-mode jumper configuration.

For large industrial equipment, the combination of high current capacity and local operator interface makes this configuration particularly useful where both centralized automation and local maintenance access are required.

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2. Brand and Product Series

Item	Specification
Model	20G11BD960AN4NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Series Group	PowerFlex 750-Series
Product Type	High-Power AC Variable Frequency Drive
Product Configuration	PowerFlex 755 AC Packaged Drive
Cooling	Air Cooled / Forced Air
Input Voltage	480 VAC
Input Phase	3 Phase
Output Current	960 A
Light-Duty Rating	900 HP class
Normal-Duty Rating	800 HP class
Heavy-Duty Rating	700 HP class
Frame	Frame 9
Enclosure	NEMA Type 1 / IP20
Package Style	600 mm Deep MCC Style
Input Type	AC Input with Precharge
Dynamic Braking	None / No Internal Transistor
Filtering	EMC Filter
CM Jumper	Removed
HIM	Enhanced LCD HIM
Keypad	Full Numeric
Communication	Embedded Ethernet/IP
Typical Installation	Industrial MCC / Electrical Room
Typical Application	Large Industrial Motor Control

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3. Main Technical Parameters

Technical Parameter	Specification
Model	20G11BD960AN4NNNNN
Brand	Allen-Bradley
Product Series	PowerFlex 755
Series Group	PowerFlex 750-Series
Product Type	AC Variable Frequency Drive
Input Voltage	480 VAC
Input Phase	3 Phase
DC Bus Voltage Class	Approximately 650 VDC
Output Current	960 A
Light-Duty Rating	900 HP class
Normal-Duty Rating	800 HP class
Heavy-Duty Rating	700 HP class
Approx. Light-Duty Power	671 kW
Approx. Normal-Duty Power	597 kW
Approx. Heavy-Duty Power	522 kW
Cooling	Air Cooled / Forced Air
Frame	9
Enclosure	NEMA Type 1
Protection	IP20
Package Style	600 mm Deep MCC Style
Depth	Approximately 600 mm
Width	Configuration Dependent
Height	Configuration Dependent
Weight	Approximately 1,246 kg / 2,748 lb
Input Configuration	AC Input with Precharge
Dynamic Braking	None
Internal Braking Transistor	None
Filtering	EMC Filter
CM Jumper	Removed
HIM	Enhanced LCD HIM
Keypad	Full Numeric
Local Interface	Yes
Ethernet/IP	Embedded
Installation	Industrial / MCC
Cooling System	Forced Air
Application Class	High-Power Industrial

The approximately 1,246 kg figure corresponds to the listed 2,748 lb product weight and is useful for preliminary handling and installation planning. Final shipping weight can vary depending on packaging and configuration.

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4. Product Introduction

The 20G11BD960AN4NNNNN is designed for large-scale industrial motor applications where a conventional motor starter or small variable-frequency drive would not provide sufficient capacity or process control.

A variable-frequency drive controls the speed and torque characteristics of an AC motor by regulating the electrical power delivered to the motor.

Instead of operating the motor at one fixed speed, the drive can adjust motor speed according to the process requirement.

This is especially useful for large pumps, fans, blowers, conveyors and other process machines.

The 20G11BD960AN4NNNNN combines this variable-speed capability with a 960 A output rating, allowing it to control very large motors.

The PowerFlex 755 platform is intended for industrial applications where motor control, process integration, diagnostics and communication are important.

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5. What Makes the AN4 Configuration Different?

The AN4 portion of the catalog number is significant.

The AN4 configuration provides an Enhanced LCD HIM with full numeric keypad.

This makes the unit different from the comparable AN0 configuration, which is generally supplied without a local HIM.

Configuration	Local HIM	Typical Use
20G11BD960AN0NNNNN	No HIM	Centralized PLC / HMI control
20G11BD960AN2NNNNN	HIM configuration variant	Local/remote control applications
20G11BD960AN4NNNNN	Enhanced LCD HIM, Full Numeric	Local commissioning and maintenance
20G11BD960JN4NNNNN	Enhanced LCD HIM, Full Numeric	Replacement configuration

The AN4 version is therefore a practical choice when technicians need direct access to drive parameters and status information at the equipment.

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6. Enhanced LCD HIM

The Enhanced LCD HIM is one of the most useful features of this particular configuration.

HIM stands for Human Interface Module.

It provides a local operator interface for the drive.

Depending on the application and configured parameters, a technician can use the local interface for functions such as:

• Viewing drive status
• Viewing faults
• Checking operating parameters
• Entering parameter values
• Commissioning the drive
• Checking motor-related information
• Adjusting operating settings
• Performing troubleshooting

This can be particularly useful in large industrial plants where the drive may be installed in an electrical room away from the main operator station.

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7. Full Numeric Keypad

The full numeric keypad provides direct numerical input.

This can simplify parameter adjustment during commissioning.

For maintenance technicians, a local numeric interface can be more convenient than connecting an external computer for every basic adjustment.

It also provides an additional troubleshooting interface when the plant-level PLC or HMI is unavailable.

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8. 960 A Output Capacity

The 960 A output rating is the central electrical characteristic of this drive.

This is a very large industrial VFD.

It is intended for motors requiring substantial current.

At this current level, the drive is suitable for large process machinery and high-power mechanical equipment.

The high current capacity also means that electrical installation must be carefully engineered.

Important areas include:

• Incoming power conductors
• Motor conductors
• Busbars
• Protection devices
• Grounding
• Cable termination
• Mechanical cable routing
• Cabinet ventilation
• Short-circuit protection
• Maintenance access

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9. Horsepower Ratings

The drive provides different motor ratings depending on the duty classification.

Duty Rating	Motor Rating	Approximate kW
Light Duty	900 HP	671 kW
Normal Duty	800 HP	597 kW
Heavy Duty	700 HP	522 kW

The horsepower rating should not be used as the only selection criterion.

Actual motor nameplate current, overload requirements, acceleration time, mechanical inertia and process loading must also be evaluated.

A large centrifugal fan, for example, may have a very different electrical duty cycle from a heavily loaded conveyor even when the two motors have similar horsepower ratings.

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10. 480 VAC Three-Phase Input

The 20G11BD960AN4NNNNN is designed for a 480 VAC three-phase industrial power system.

This voltage class is widely used for large industrial motors.

A 480 VAC three-phase supply allows large motor loads to be supplied without using the much higher voltage classes normally associated with large medium-voltage motors.

Typical installations include:

• Manufacturing facilities
• Mining plants
• Cement plants
• Water-treatment facilities
• Process industries
• Metal-processing plants
• Material-handling facilities
• Large industrial utility systems

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11. AC Input With Precharge

The drive uses an AC input with precharge arrangement.

Precharge is important in high-power electronic drives because the DC bus contains substantial capacitance.

When the drive is energized, the precharge system controls the initial charging process and helps manage the electrical stress associated with energizing the DC bus.

For a 960 A-class drive, this is an important part of the overall power architecture.

Maintenance personnel should always follow the appropriate electrical isolation and discharge procedures before working on the drive.

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12. DC Bus

The 480 VAC input is converted within the drive into an internal DC-link voltage.

The drive then uses its power electronics to generate a controlled AC output for the motor.

A simplified operating sequence is:

480 VAC Three-Phase Supply

↓

Input / Precharge Section

↓

DC Bus

↓

Power Switching Section

↓

Variable-Frequency AC Output

↓

Large Industrial Motor

↓

Mechanical Equipment

The drive controls the electrical output according to the motor-control strategy and process requirements.

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13. Variable-Speed Motor Control

Variable-speed control is one of the primary reasons for selecting a PowerFlex 755.

Industrial processes rarely operate under exactly the same conditions all the time.

For example, a pump may need:

• Maximum flow during production
• Reduced flow during low demand
• Controlled pressure during startup
• Gradual speed changes

A fixed-speed motor cannot provide the same degree of control.

A VFD allows the motor speed to be adjusted to suit the process.

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14. Controlled Acceleration

Large motors can have significant inertia.

If the motor is started too aggressively, mechanical stress can be transferred through the complete drivetrain.

This can affect:

• Couplings
• Shafts
• Gearboxes
• Bearings
• Belts
• Chains
• Conveyor systems

Controlled acceleration allows the motor to reach operating speed according to a defined profile.

This can produce smoother machine startup and reduce mechanical shock.

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15. Controlled Deceleration

The drive can also control motor deceleration.

This can be important for large rotating equipment.

However, this particular configuration has no internal dynamic-braking transistor.

Therefore, applications requiring rapid stopping of high-inertia loads must be evaluated carefully.

Possible solutions may include:

• Longer deceleration times
• Mechanical brakes
• External braking equipment
• Regenerative solutions

The appropriate method depends on the actual mechanical system.

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16. Dynamic Braking

Parameter	Specification
Model	20G11BD960AN4NNNNN
Dynamic Braking	None
Internal Braking Transistor	None
High-Inertia Application	Requires Evaluation
Rapid Stop Requirement	Requires Additional Engineering

This point should not be overlooked when selecting the drive for high-inertia machinery.

A drive with a high horsepower rating is not automatically suitable for every high-inertia application.

Stopping requirements must be considered separately from continuous motor power requirements.

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17. EMC Filtering

The model includes EMC filtering.

Electromagnetic compatibility is important in industrial VFD installations because high-frequency switching can produce electrical noise.

Good installation practices remain necessary even when an EMC filter is installed.

These practices include:

• Correct grounding
• Proper bonding
• Appropriate motor cable selection
• Cable shielding where required
• Separation of power and signal wiring
• Proper communication cable routing
• Correct cabinet construction

EMC performance is ultimately a system-level issue.

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18. CM Jumper Removed

The catalog configuration specifies the CM jumper removed.

This configuration affects the drive’s common-mode electrical behavior.

It is particularly relevant to grounding, EMC and system-level electrical design.

When replacing an existing drive, the complete catalog number should be checked rather than assuming that two drives with the same voltage and current ratings have identical electrical configurations.

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19. Frame 9

The drive uses Frame 9 construction.

Frame size affects the physical arrangement of:

• Power electronics
• Cooling equipment
• Input section
• Output section
• Internal bus structures
• Mechanical mounting
• Cable access

The Frame 9 design is appropriate for a very large industrial drive.

It also means that the equipment requires significantly more installation space than compact VFDs.

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20. Dimensions

The package is associated with a 600 mm deep MCC-style construction.

For preliminary planning:

Mechanical Parameter	Specification
Model	20G11BD960AN4NNNNN
Frame	9
Package Style	600 mm Deep MCC Style
Depth	Approximately 600 mm
Width	Configuration Dependent
Height	Configuration Dependent
Enclosure	NEMA Type 1
Protection	IP20
Cooling	Forced Air
Installation	Industrial / MCC
Mounting Area	Heavy Industrial Equipment
Service Access	Required
Cable Entry Space	Required
Ventilation Space	Required

The 600 mm depth should be considered a package-depth reference rather than the complete installation footprint.

Actual installation space must also accommodate:

• Incoming power cables
• Motor cables
• Cable bending radius
• Ventilation
• Maintenance access
• Door movement
• Service access
• Electrical clearances

For final cabinet fabrication, the exact mechanical drawing for the configured unit should be used.

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21. Weight

This is a very large piece of industrial electrical equipment.

The listed product weight is approximately 2,748 lb, which converts to approximately 1,246 kg.

Weight Parameter	Specification
Model	20G11BD960AN4NNNNN
Listed Weight	Approx. 2,748 lb
Approx. Metric Weight	Approx. 1,246 kg
Equipment Class	Heavy Industrial Equipment
Floor Loading	Must Be Evaluated
Transportation	Heavy-Duty Handling Required
Lifting	Mechanical Lifting Required
Shipping Weight	May Differ From Equipment Weight

The 1,246 kg figure is useful for preliminary logistics and floor-loading calculations.

Actual shipping weight can be different because of packaging and transportation materials.

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22. Air-Cooled Construction

The 20G11BD960AN4NNNNN uses forced-air cooling.

At a 960 A rating, the drive produces significant heat during operation.

The cooling system therefore plays an important role in reliability.

The installation should provide adequate:

• Air circulation
• Room ventilation
• Heat removal
• Fan operation
• Environmental control

Dust and contamination should also be controlled.

A heavily contaminated electrical room can reduce cooling effectiveness and increase maintenance requirements.

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23. NEMA Type 1 / IP20

The package is specified as NEMA Type 1 / IP20.

This indicates that the equipment is intended for an appropriate indoor industrial electrical environment rather than direct outdoor exposure.

The drive should be protected from:

• Rain
• Direct water spray
• Excessive moisture
• Severe dust contamination
• Corrosive atmospheres
• Extreme environmental conditions

Where the surrounding environment is harsh, an appropriate enclosure or controlled electrical room may be required.

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24. Large Pump Applications

Large pumps are one of the strongest application areas for this drive.

Typical applications include:

• Raw-water pumps
• Cooling-water pumps
• Process-water pumps
• Transfer pumps
• Wastewater pumps
• Mine dewatering pumps
• Industrial circulation pumps

Variable-speed control can allow the pump to respond to actual process demand.

Instead of continuously running at full speed, the motor can operate at a lower speed when less flow is required.

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25. Fan Applications

Large industrial fans can require hundreds of horsepower.

The PowerFlex 755 can be used to control:

• Exhaust fans
• Cooling fans
• Mine ventilation fans
• Process ventilation fans
• Dust-collection fans
• Combustion-air fans
• Cement plant fans

Variable-speed operation provides control over airflow.

This can also provide energy-saving opportunities when maximum airflow is not continuously required.

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26. Blower Applications

Large process blowers are another suitable application.

Examples include:

• Aeration blowers
• Process-air blowers
• Pneumatic conveying blowers
• Combustion blowers
• Industrial ventilation blowers

The drive allows the blower speed to be adjusted according to actual process requirements.

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27. Conveyor Applications

Large conveyor systems often require controlled acceleration.

This is especially true when the conveyor contains a large quantity of material.

Starting a heavily loaded conveyor too aggressively can create significant mechanical stress.

The drive can provide controlled motor acceleration, allowing the conveyor system to come up to speed progressively.

Applications include:

• Mining conveyors
• Cement conveyors
• Aggregate conveyors
• Bulk material handling
• Port facilities
• Processing plants

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28. Mining Applications

Mining is a particularly demanding industrial environment.

Large motors may be used for:

• Conveyor systems
• Ventilation
• Pumping
• Material handling
• Processing equipment
• Dewatering

The PowerFlex 755’s high current capacity makes this type of drive suitable for very large mining-related motor applications when the environmental installation requirements are properly addressed.

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29. Cement Plant Applications

Cement plants use many high-power motors.

Potential applications include:

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

The ability to control motor speed can be useful for optimizing the process according to production conditions.

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30. Water and Wastewater Applications

Large water-treatment facilities frequently require high-power pumping systems.

The 20G11BD960AN4NNNNN can be considered for:

• Water intake pumps
• Transfer pumps
• High-capacity wastewater pumps
• Flood-control pumps
• Cooling-water pumps
• Process-water pumps

Variable-speed control can be useful where flow and pressure vary throughout the operating cycle.

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31. Steel and Metal Processing

Large metal-processing plants use high-power motors throughout their production infrastructure.

Potential applications include:

• Cooling-water systems
• Large fans
• Blowers
• Conveyors
• Material handling
• Auxiliary process systems

The 960 A capacity gives the drive enough current capability for very large industrial motors.

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32. Advantages of the 20G11BD960AN4NNNNN

32.1 Very High Current Capacity

The 960 A output rating allows the drive to operate very large motors.

This is the primary advantage over smaller PowerFlex configurations.

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32.2 Large Horsepower Range

The drive can support approximately:

• 900 HP Light Duty
• 800 HP Normal Duty
• 700 HP Heavy Duty

This provides flexibility across different application types.

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32.3 Local Enhanced LCD HIM

The Enhanced LCD HIM is a major advantage of the AN4 configuration.

Maintenance technicians can access the drive directly at the equipment.

This can simplify:

• Commissioning
• Parameter adjustment
• Fault checking
• Troubleshooting
• Local monitoring

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32.4 Full Numeric Interface

The full numeric keypad is useful when entering parameters and navigating drive settings.

For commissioning personnel, direct numerical entry can be more convenient than using external equipment for routine adjustments.

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32.5 Embedded Ethernet/IP

The drive can be integrated into an industrial Ethernet-based automation architecture.

This provides a path for communication with:

• PLCs
• HMIs
• SCADA systems
• Supervisory systems
• Plant networks

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32.6 Air-Cooled Architecture

Forced-air cooling is well suited to large industrial electrical rooms where sufficient ventilation can be provided.

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32.7 MCC-Style Installation

The 600 mm deep MCC-style package can fit into centralized industrial electrical architectures.

This is useful for large plants where drives are grouped together in electrical rooms.

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32.8 EMC Filtering

The integrated EMC filtering supports electrical-noise management as part of a properly engineered installation.

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32.9 High-Power Industrial Construction

The drive is designed for industrial-scale applications rather than small machine-control systems.

It is suitable for large motor loads and continuous industrial processes.

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33. Energy-Saving Potential

The drive can provide energy-saving opportunities in variable-torque applications.

This is particularly relevant to:

• Pumps
• Fans
• Blowers

For these machines, process demand may change substantially.

If the process does not require full motor speed, reducing speed can reduce the mechanical power requirement.

Actual savings depend on the complete system.

Factors include:

• Motor efficiency
• Pump efficiency
• Fan efficiency
• Operating hours
• Load profile
• Process pressure
• Process flow
• Control strategy

The VFD itself does not guarantee a specific percentage of energy savings.

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34. Automation Advantages

The combination of local HIM and Ethernet/IP makes this configuration particularly flexible.

The drive can be operated locally when required and integrated into a plant automation system.

A typical arrangement can be:

PLC

↓

Ethernet/IP

↓

PowerFlex 755

↓

Large Motor

↓

Industrial Machine

At the same time, a maintenance technician can access the drive locally through the Enhanced LCD HIM.

This gives the system two useful control paths:

Centralized Automation

and

Local Maintenance Access

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35. Maintenance Advantages of the AN4 Configuration

The local HIM is particularly useful during maintenance.

For example, if a motor unexpectedly stops, a technician can inspect the drive locally rather than depending entirely on the plant HMI.

The technician can check relevant operating information and fault conditions.

This can reduce troubleshooting time.

For large industrial plants, minimizing downtime is often more important than the cost of the drive itself.

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36. Maintenance Recommendations

Maintenance Area	Recommended Attention
Cooling Fans	Check operating condition
Airflow	Verify adequate circulation
Power Connections	Inspect periodically
Motor Connections	Inspect
Grounding	Verify
EMC Connections	Inspect
Ethernet/IP	Verify communication
HIM	Check display and keypad
Fault History	Review regularly
Electrical Room	Keep clean
Dust	Control
Temperature	Monitor
Ventilation	Maintain
Mechanical Connections	Inspect
Cable Terminations	Inspect
Drive Environment	Keep within specified conditions

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37. Installation Considerations

A 960 A drive should be treated as a major electrical installation.

Installation Factor	Requirement
Input Voltage	480 VAC
Input Phase	3 Phase
Output Current	960 A
Input Protection	Correctly Sized
Motor Cable	Correctly Sized
Grounding	Properly Engineered
EMC	System-Level Design
Cooling	Adequate Forced Air
Mechanical Support	Heavy-Duty
Floor Loading	Evaluate
Lifting	Mechanical Handling
Cable Bending	Adequate Space
Maintenance Clearance	Required
Ambient Environment	Controlled
Communication	Properly Integrated

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38. Electrical Installation

At 960 A, conductor and termination selection becomes a major engineering issue.

The installation should consider:

• Feeder current
• Cable ampacity
• Busbar capacity
• Short-circuit rating
• Protective devices
• Grounding
• Cable routing
• Motor cable length
• EMC
• Harmonic effects
• Heat generation
• Cabinet ventilation

The VFD must be integrated into the complete electrical distribution system.

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39. Mechanical Installation

The approximately 1,246 kg equipment weight means that mechanical installation must be planned carefully.

The installation team should consider:

• Delivery route
• Door dimensions
• Floor loading
• Lifting points
• Lifting equipment
• Cabinet positioning
• Cable access
• Ventilation
• Maintenance access
• Future replacement access

This is not equipment that should be handled manually.

Proper lifting equipment should be used.

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40. Recommended Same-Series Models

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

No.	Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	Cooling
1	20G11BD800AN4NNNNN	480 VAC	800 A	800 HP	700 HP	600 HP	9	Air Cooled
2	20G11BD960AN4NNNNN	480 VAC	960 A	900 HP	800 HP	700 HP	9	Air Cooled
3	20G11BD1K2AN4NNNNN	480 VAC	1,135 A	1,100 HP	1,000 HP	800 HP	9	Air Cooled
4	20G11BD1K3AN4NNNNN	480 VAC	1,365 A	1,250 HP	1,100 HP	900 HP	9	Air Cooled
5	20G11BD1K4AN4NNNNN	480 VAC	1,420 A	1,350 HP	1,250 HP	1,000 HP	9	Air Cooled

These are useful choices when the motor current requirement changes but the application remains within the high-power PowerFlex 755 architecture.

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41. Same-Series Electrical Comparison

Model	Input	Current	LD	ND	HD	Frame	Approx. Power Range
20G11BD800AN4NNNNN	480 VAC, 3 Phase	800 A	800 HP	700 HP	600 HP	9	Up to approx. 597 kW
20G11BD960AN4NNNNN	480 VAC, 3 Phase	960 A	900 HP	800 HP	700 HP	9	Up to approx. 671 kW
20G11BD1K2AN4NNNNN	480 VAC, 3 Phase	1,135 A	1,100 HP	1,000 HP	800 HP	9	Up to approx. 820 kW
20G11BD1K3AN4NNNNN	480 VAC, 3 Phase	1,365 A	1,250 HP	1,100 HP	900 HP	9	Up to approx. 932 kW
20G11BD1K4AN4NNNNN	480 VAC, 3 Phase	1,420 A	1,350 HP	1,250 HP	1,000 HP	9	Up to approx. 1,007 kW

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42. Mechanical Comparison of Related Models

Model	Frame	Package Style	Depth	Cooling	Approx. Weight
20G11BD800AN4NNNNN	9	MCC Style	600 mm class	Air Cooled	1,000 kg class
20G11BD960AN4NNNNN	9	MCC Style	600 mm class	Air Cooled	Approx. 1,246 kg
20G11BD1K2AN4NNNNN	9	MCC Style	600 mm class	Air Cooled	Configuration Dependent
20G11BD1K3AN4NNNNN	9	MCC Style	600 mm class	Air Cooled	Configuration Dependent
20G11BD1K4AN4NNNNN	9	MCC Style	600 mm class	Air Cooled	Configuration Dependent

The exact mechanical dimensions and weights of related catalog numbers should be confirmed individually before fabrication or transportation planning.

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43. Five Related PowerFlex Models

No.	Model	Product Series	Voltage Class	Current / Power Class	Typical Application
1	20G11BD800AN4NNNNN	PowerFlex 755	480 VAC	800 A	Large Pumps / Fans
2	20G11BD960AN4NNNNN	PowerFlex 755	480 VAC	960 A	Very Large Motors
3	20G11BD1K2AN4NNNNN	PowerFlex 755	480 VAC	1,135 A	Large Process Motors
4	20G11BD1K3AN4NNNNN	PowerFlex 755	480 VAC	1,365 A	Heavy Industrial Loads
5	20G11BD1K4AN4NNNNN	PowerFlex 755	480 VAC	1,420 A	Very Large Process Equipment

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44. Five Same-Brand Popular / Related Models

The following are useful models from the same Allen-Bradley PowerFlex range, covering different levels of motor power and machine requirements.

No.	Model	Product Series	Voltage Class	General Power Level	Typical Application
1	25B-D017N104	PowerFlex 525	480 VAC Class	Small / Medium	Pumps, Fans, Conveyors
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 Equipment
5	20G11BD960AN4NNNNN	PowerFlex 755	480 VAC	Very High	Large Industrial Motors

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45. Same-Brand Detailed Comparison

Model	Series	Voltage Class	Cooling	Typical Scale	Local Interface
25B-D017N104	PowerFlex 525	480 VAC Class	Air Cooled	Small / Medium	Integrated Interface
25C-D017N114	PowerFlex 527	480 VAC Class	Air Cooled	Small / Medium	Application Dependent
20F11NC2P1JA0NNNNN	PowerFlex 753	480 VAC Class	Air Cooled	Medium / High	Configuration Dependent
20G11NC2P1JA0NNNNN	PowerFlex 755	480 VAC Class	Air Cooled	High	Configuration Dependent
20G11BD960AN4NNNNN	PowerFlex 755	480 VAC	Forced Air	Very High	Enhanced LCD HIM

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46. Application Suitability

Application	Suitability	Main Reason
Large Centrifugal Pumps	Excellent	High current and variable speed
Large Fans	Excellent	High-power speed control
Large Blowers	Excellent	Large motor capacity
Mining Conveyors	Excellent	Controlled acceleration
Cement Conveyors	Excellent	Large motor control
Water Pumps	Excellent	Flow and pressure regulation
Wastewater Pumps	Excellent	Variable-speed pumping
Industrial Ventilation	Excellent	Airflow control
Steel Plant Auxiliary Systems	Excellent	High-current capacity
Material Handling	Excellent	Controlled motor operation
Small Pumps	Oversized	Excessive power capacity
Small Fans	Oversized	Smaller drive preferable
Small Machines	Oversized	High current unnecessary

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47. Duty Selection

Application	Duty to Evaluate	Main Consideration
Large Centrifugal Pump	LD / ND	Continuous load
Large Fan	LD / ND	Variable process demand
Large Blower	LD / ND	Continuous operation
Large Conveyor	ND / HD	Starting torque
Mining Conveyor	ND / HD	High inertia
Heavy Material Handling	HD	Overload
Large Water Pump	LD / ND	Flow and pressure
Cement Fan	LD / ND	Continuous duty
Process Machinery	ND / HD	Load cycle
High-Inertia Equipment	HD	Acceleration / deceleration

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48. Why Choose the AN4 Configuration?

The biggest practical advantage of 20G11BD960AN4NNNNN compared with the no-HIM version is the local operator interface.

A large industrial VFD can be connected to a sophisticated PLC and HMI system, but there are situations where local access is still valuable.

During commissioning, a technician may want to work directly at the drive.

During maintenance, the technician may need to check a fault without waiting for access to the central control system.

During troubleshooting, the local HIM can provide another way of accessing drive information.

This makes the AN4 configuration particularly useful in industrial plants where both centralized automation and local service access are required.

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49. Local and Remote Control

The system can be designed around both local and remote operating concepts.

A typical architecture is:

Plant PLC

↓

Ethernet/IP

↓

PowerFlex 755

↓

Large Motor

↓

Process Equipment

At the same time:

Maintenance Technician

↓

Enhanced LCD HIM

↓

PowerFlex 755

This provides a practical combination of automation and maintenance access.

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50. Comparison Between AN0 and AN4

Parameter	20G11BD960AN0NNNNN	20G11BD960AN4NNNNN
Input Voltage	480 VAC	480 VAC
Phase	3 Phase	3 Phase
Current	960 A	960 A
Light Duty	900 HP	900 HP
Normal Duty	800 HP	800 HP
Heavy Duty	700 HP	700 HP
Frame	9	9
Cooling	Air Cooled	Air Cooled
EMC Filter	Yes	Yes
CM Jumper	Removed	Removed
Dynamic Braking	None	None
Input	AC with Precharge	AC with Precharge
HIM	No HIM	Enhanced LCD HIM
Numeric Keypad	No	Full Numeric
Local Operation	Limited	Enhanced
Approx. Weight	Configuration Dependent	Approx. 1,246 kg
Package Depth	600 mm class	600 mm class

The electrical power rating is essentially the same, while the primary practical difference is the local HIM configuration.

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51. Maintenance and Troubleshooting

For a large industrial drive, troubleshooting efficiency is extremely important.

The Enhanced LCD HIM can be useful for checking:

• Drive status
• Fault conditions
• Operating parameters
• Speed reference
• Output frequency
• Motor-related information
• Configuration settings
• Alarm conditions

This can reduce dependence on external diagnostic equipment for routine service work.

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52. Long-Term Reliability Considerations

A high-power drive can operate reliably for many years when the installation environment is properly maintained.

Important factors include:

• Correct ambient temperature
• Adequate ventilation
• Clean airflow
• Proper electrical connections
• Good grounding
• Correct motor cable installation
• Stable supply voltage
• Proper drive configuration
• Preventive maintenance
• Correct application duty

The most common installation mistake with very large VFDs is treating them as simple electrical boxes.

They are part of a complete electrical, mechanical and thermal system.

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53. Complete Technical Specification

Parameter	20G11BD960AN4NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Series Group	PowerFlex 750-Series
Product Type	High-Power AC Variable Frequency Drive
Configuration	PowerFlex 755 AC Packaged Drive
Input Voltage	480 VAC
Input Phase	3 Phase
DC Voltage Class	Approx. 650 VDC
Output Current	960 A
Light-Duty Rating	900 HP
Normal-Duty Rating	800 HP
Heavy-Duty Rating	700 HP
Light-Duty Approx. Power	671 kW
Normal-Duty Approx. Power	597 kW
Heavy-Duty Approx. Power	522 kW
Cooling	Air Cooled / Forced Air
Frame	9
Enclosure	NEMA Type 1
Protection	IP20
Package Style	600 mm Deep MCC Style
Depth	Approximately 600 mm
Width	Configuration Dependent
Height	Configuration Dependent
Approx. Weight	Approximately 1,246 kg
Input Type	AC Input with Precharge
Dynamic Braking	None
Internal Braking Transistor	None
Filtering	EMC Filter
CM Jumper	Removed
HIM	Enhanced LCD HIM
Keypad	Full Numeric
Communication	Embedded Ethernet/IP
Local Interface	Yes
Typical Applications	Large Pumps, Fans, Blowers, Conveyors, Mining, Cement, Water and Process Equipment
Installation	Industrial / MCC
Product Status	Discontinued
Direct Replacement	20G11BD960JN4NNNNN

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54. Final Summary

The Allen-Bradley 20G11BD960AN4NNNNN is a very large PowerFlex 755 AC Packaged Drive intended for high-power industrial motor applications.

Its main electrical characteristics are a 480 VAC three-phase input, 960 A output current, approximately 900 HP Light-Duty, 800 HP Normal-Duty and 700 HP Heavy-Duty motor ratings.

The drive uses a Frame 9, air-cooled construction and a 600 mm deep MCC-style package.

One of the most important features of this particular catalog number is the Enhanced LCD HIM with full numeric keypad.

This makes the AN4 version especially suitable for applications where technicians need direct access to the drive for commissioning, parameter adjustment, diagnostics and maintenance.

The drive also provides embedded Ethernet/IP, allowing it to communicate with a larger industrial automation system.

The EMC filter and removed CM jumper configuration should be considered as part of the complete electrical and grounding design.

The drive has no internal dynamic-braking transistor, so high-inertia applications requiring rapid deceleration should be evaluated separately.

The equipment is physically substantial. The package depth is approximately 600 mm, while the listed equipment weight is approximately 1,246 kg. The final installation must provide adequate floor loading, lifting capability, ventilation, cable space and maintenance access.

The strongest application areas are large centrifugal pumps, industrial fans, blowers, mining conveyors, cement equipment, water-treatment systems, wastewater systems, material-handling equipment, steel-plant auxiliary systems and other large industrial motors.

For pumps, fans and blowers, variable-speed operation can provide better process control and may provide significant energy-saving opportunities when the operating demand varies.

For conveyors and high-inertia machinery, controlled acceleration can reduce mechanical shock and improve the starting characteristics of the machine.

Compared with the equivalent no-HIM configuration, the AN4 version is more attractive when local operator and maintenance access is important.

In practical terms, the 20G11BD960AN4NNNNN is best viewed as a high-power, large-frame, air-cooled industrial VFD with a local Enhanced LCD interface and Ethernet/IP integration, designed for demanding motor-control applications where both high electrical capacity and practical service access are important.