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Allen-Bradley 20G1ANB477JA0NNNNN PowerFlex 755 AC Drive

1. Product Introduction

The Allen-Bradley 20G1ANB477JA0NNNNN is a high-current PowerFlex 755 AC drive designed for large three-phase industrial motor applications.

This model belongs to the PowerFlex 755 series and is designed for the 240 V-class electrical system, with a specified 240/208 VAC three-phase input class. It provides a 477 A output-current rating, a 200 HP Normal Duty rating, and a 175 HP Heavy Duty rating. The drive uses Frame 7 construction and forced-air cooling.

The drive is intended for applications where motor speed, acceleration, deceleration, torque, and operating status need to be controlled electronically rather than relying on a fixed-speed starter.

Typical applications include large pumps, fans, blowers, conveyors, material-handling equipment, compressors, mixers, process machinery, and other industrial equipment using large three-phase AC motors.

The 20G1ANB477JA0NNNNN is configured with embedded EtherNet/IP communication, AC input with precharge, no DC terminals, filtered input, CM jumper installed, and no internal dynamic-braking transistor. The catalog configuration also specifies a blank HIM arrangement with no HIM supplied.

With a 477 A rating, this model sits near the upper end of the 208/240 V-class PowerFlex 755 range. It is intended for applications requiring considerably more current capacity than smaller Frame 6 models.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Full Catalog Number	20G1ANB477JA0NNNNN
Drive Type	Air-Cooled AC Drive
Cooling	Forced Air
Voltage Class	240/208 VAC, 3 Phase
Rated Output Current	477 A
Normal Duty Rating	200 HP
Heavy Duty Rating	175 HP
Approx. Normal Duty Power	149 kW
Approx. Heavy Duty Power	131 kW
Frame	Frame 7
Enclosure	IP20/IP00, NEMA/UL Open Type
Communication	Embedded EtherNet/IP
Input Type	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Mounting	Vertical
Primary Function	Variable-Speed AC Motor Control

The PowerFlex 755 family covers a broad range of AC drive ratings and voltage classes. The 20G1ANB477JA0NNNNN represents one of the larger 240 V-class air-cooled configurations, using Frame 7 construction.

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3. Complete Product Parameters

Parameter	Specification
Model	20G1ANB477JA0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Category	Industrial AC Drive
Product Type	Variable Frequency Drive
Cooling Type	Forced Air
Input Voltage Class	240/208 VAC
Input Phase	3 Phase
Output Current	477 A
Normal Duty	200 HP
Heavy Duty	175 HP
Approx. Normal Duty Power	149 kW
Approx. Heavy Duty Power	131 kW
Frame Size	Frame 7
Enclosure	IP20/IP00
Enclosure Type	NEMA/UL Open Type
Input Configuration	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Cooling	Forced Air
Mounting	Vertical
Typical Motor Application	Large Three-Phase AC Motors
Typical Uses	Pumps, Fans, Blowers, Conveyors, Compressors, Mixers, Process Machinery
Dimensions	Frame 7; verify final mechanical drawing
Weight	Verify exact supplied configuration; approximately 68 kg may be used as a planning reference for comparable Frame 7 configurations
Installation	Protected electrical cabinet
Control Architecture	Networked / hardwired industrial drive control

The 477 A, 200 HP ND, 175 HP HD and Frame 7 ratings are identified for this 240/208 V configuration. The product configuration also specifies forced-air cooling, IP20/IP00 open construction, embedded EtherNet/IP, filtered input, CM jumper installed, AC input with precharge, no DC terminals, and no internal dynamic-braking transistor.

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4. Electrical Specification

The 20G1ANB477JA0NNNNN is designed for three-phase 240/208 VAC operation.

Its 477 A current rating makes it suitable for large motor systems within this voltage class.

The drive’s 200 HP Normal Duty rating corresponds to approximately 149 kW, while the 175 HP Heavy Duty rating corresponds to approximately 131 kW.

Electrical Parameter	Specification
Model	20G1ANB477JA0NNNNN
Voltage Class	240/208 VAC
Input Phase	Three Phase
Rated Current	477 A
Normal Duty	200 HP
Heavy Duty	175 HP
Approx. Normal Duty Power	149 kW
Approx. Heavy Duty Power	131 kW
Input Type	AC Input with Precharge
DC Terminals	None
Cooling	Forced Air
Filtering	Filtered
CM Configuration	Jumper Installed
Dynamic Braking	None
Network	Embedded EtherNet/IP
Frame	Frame 7

The motor’s actual nameplate current should be used when determining whether the drive is correctly sized. Horsepower alone is not sufficient because motor efficiency, power factor, duty cycle, ambient temperature, overload requirements, acceleration time, and application torque all affect drive selection.

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5. Normal Duty Rating

The 20G1ANB477JA0NNNNN has a Normal Duty rating of 200 HP.

This rating is appropriate for applications where the motor load generally follows a moderate torque profile and does not require the higher overload conditions associated with more demanding constant-torque machinery.

Typical Normal Duty applications include:

• Large centrifugal pumps.
• Large centrifugal fans.
• Industrial blowers.
• Cooling systems.
• Large air-handling equipment.
• Certain process pumps.
• Industrial ventilation systems.

The 200 HP rating gives the drive a substantial capacity for large motor installations.

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6. Heavy Duty Rating

The Heavy Duty rating is 175 HP.

Heavy Duty sizing should be considered where the application has higher starting torque, frequent acceleration, significant load variation, or more demanding overload requirements.

Typical examples include:

• Heavy conveyors.
• Loaded material-handling systems.
• Mixers.
• Agitators.
• Certain compressors.
• High-inertia machines.
• Machinery with frequent starts and stops.

The Heavy Duty rating should always be compared with the motor nameplate current and the actual mechanical load.

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7. 477 A Current Rating

The 477 A current rating is one of the main characteristics of this model.

A current rating at this level makes the drive suitable for large three-phase motors and high-capacity industrial equipment.

The high current capacity is useful when the motor experiences:

• Large starting loads.
• High mechanical inertia.
• Variable torque.
• Long acceleration periods.
• Frequent acceleration.
• Frequent deceleration.
• Continuous high-load operation.
• Significant process load changes.

The 477 A rating also means that installation planning becomes more important. Incoming and outgoing power cables, terminals, protective devices, cabinet ventilation, grounding conductors, and mechanical support must all be sized appropriately.

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8. Frame 7 Construction

The 20G1ANB477JA0NNNNN uses Frame 7 construction.

Frame 7 is intended for higher-current drive applications and provides the mechanical package required for the 477 A rating.

Compared with smaller Frame 6 units, Frame 7 equipment generally requires more cabinet space and greater attention to:

• Power-cable routing.
• Cable bending radius.
• Heat dissipation.
• Ventilation.
• Mounting support.
• Service access.
• Lifting and handling.
• Terminal accessibility.

The Frame 7 construction is an important consideration when replacing a smaller drive with this model.

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9. Dimensions and Weight

The exact mechanical dimensions should be taken from the final Frame 7 mechanical drawing associated with the supplied catalog configuration.

The available product information confirms the Frame 7 construction and provides dimensional-drawing documentation, but the accessible product information does not provide a sufficiently reliable exact height × width × depth figure for this specific catalog number.

For planning purposes, comparable Frame 7 PowerFlex 755 configurations are commonly listed around the 68 kg range. This should be treated as an approximate planning value, not a certified shipping weight for the exact 20G1ANB477JA0NNNNN configuration.

Mechanical Parameter	Specification
Model	20G1ANB477JA0NNNNN
Frame	Frame 7
Construction	Open Type
Cooling	Forced Air
Mounting	Vertical
Height	Verify final mechanical drawing
Width	Verify final mechanical drawing
Depth	Verify final mechanical drawing
Exact Weight	Verify final supplied configuration
Planning Weight	Approximately 68 kg
Enclosure	IP20/IP00, NEMA/UL Open Type
Installation	Electrical cabinet / protected enclosure
Cabinet Planning	Allow additional service and ventilation space

For cabinet manufacturing, transportation, floor loading, lifting, and installation, the final equipment drawing should be used rather than relying on the approximate planning weight.

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10. IP20/IP00 Open-Type Construction

The drive uses an IP20/IP00, NEMA/UL Open Type configuration.

This type of drive is intended to be installed inside a suitable electrical enclosure or other protected installation environment.

The cabinet should provide protection against:

• Water.
• Condensation.
• Excessive dust.
• Conductive contamination.
• Oil mist.
• Corrosive chemicals.
• Mechanical damage.
• Excessive humidity.

The enclosure also needs to provide suitable thermal management.

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11. Forced-Air Cooling

The 20G1ANB477JA0NNNNN uses forced-air cooling.

Because the drive can operate at a current level of 477 A, heat management is an important part of system design.

The cabinet should be designed so that:

• Cooling air can enter the drive correctly.
• Heated air can leave the drive area.
• Hot exhaust air does not return to the intake.
• Other heat-producing equipment does not unnecessarily raise intake temperature.
• Cooling fans can be inspected.
• Ventilation openings remain unobstructed.
• Filters can be serviced where applicable.

The actual cabinet cooling requirement should be calculated from the drive heat loss and the total heat load of the enclosure.

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12. AC Input With Precharge

The model is configured with AC input and precharge, with no DC terminals.

The precharge function controls the initial charging of the internal DC bus when the drive is energized.

This configuration should be considered when designing:

• Main disconnects.
• Input protection.
• Contactors.
• Fuses or circuit breakers.
• Control power.
• Emergency-stop circuits.
• Maintenance isolation.

The absence of DC terminals means this model should be treated as an AC-input drive rather than as a configuration intended for direct external DC-bus connection.

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13. Filtering and CM Jumper

The 20G1ANB477JA0NNNNN is identified as a filtered configuration with the CM jumper installed.

This arrangement forms part of the drive’s electromagnetic compatibility configuration.

Correct grounding and bonding remain important even when filtering is provided.

The motor cable, cabinet, drive, motor frame, grounding conductors, and control wiring should be considered together when planning electromagnetic compatibility.

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14. Dynamic Braking Configuration

This specific catalog configuration does not include an internal dynamic-braking transistor.

This is an important distinction when comparing this model with another PowerFlex 755 catalog number that has a different configuration suffix.

If the application requires rapid deceleration or dissipation of regenerative energy, the complete braking arrangement must be evaluated separately.

For high-inertia applications, the system designer should consider:

• Motor inertia.
• Load inertia.
• Operating speed.
• Deceleration time.
• Number of braking cycles.
• Regenerated energy.
• Mechanical braking.
• Required stopping distance.

A braking solution should not be selected simply from the drive horsepower rating.

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15. Embedded EtherNet/IP

Embedded EtherNet/IP is included in the catalog configuration.

This provides a network interface for integrating the drive into an industrial automation system.

Typical information exchanged over the network can include:

• Start commands.
• Stop commands.
• Speed references.
• Actual speed.
• Output frequency.
• Output current.
• Drive status.
• Warning status.
• Fault status.
• Operating information.
• Parameter information.

Network control can be especially useful in systems with multiple drives that need to operate together.

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16. Network Control Architecture

A typical control arrangement can be represented as:

Industrial Controller → EtherNet/IP Network → PowerFlex 755 Drive → AC Motor → Machine

This arrangement allows the controller to send operating commands to the drive and receive status information.

For large industrial systems, network integration can simplify the exchange of operating information between the drive and the central control system.

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17. Product Advantages

17.1 High Current Capacity

The 477 A current rating makes this model suitable for large motor applications within the 240/208 V class.

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17.2 Large Motor Capacity

The 200 HP Normal Duty and 175 HP Heavy Duty ratings provide substantial motor capacity for industrial machinery.

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17.3 Embedded Network Communication

Embedded EtherNet/IP allows the drive to be integrated directly into a networked automation architecture.

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17.4 Adjustable Motor Speed

The drive can vary motor speed according to process requirements rather than operating the motor continuously at fixed line frequency.

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17.5 Controlled Acceleration

Acceleration ramps can reduce sudden mechanical loading on:

• Shafts.
• Couplings.
• Gearboxes.
• Belts.
• Chains.
• Conveyor structures.
• Pump assemblies.

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17.6 Controlled Deceleration

The drive can control the rate at which the motor slows down.

Where the machine requires rapid braking, the complete braking system must be engineered separately because this specific configuration does not include an internal dynamic-braking transistor.

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17.7 Frame 7 High-Current Platform

The Frame 7 construction provides the physical package required for this high-current application.

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17.8 Industrial Cabinet Integration

The open-type construction allows the drive to be incorporated into a larger electrical cabinet containing other control and protection equipment.

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18. Pump Applications

The 20G1ANB477JA0NNNNN can be considered for large pump installations.

Typical applications include:

• Water-transfer pumps.
• Industrial circulation pumps.
• Cooling-water pumps.
• Large process pumps.
• Booster pumps.
• Water-treatment pumps.
• Large HVAC pumping systems.

Variable-speed operation allows pump speed to be adjusted according to process demand.

When process flow changes, the drive can change motor speed rather than keeping the pump at maximum speed continuously.

The actual energy benefit depends on pump characteristics, system resistance, motor efficiency, operating schedule, and process conditions.

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19. Fan Applications

Large fans can benefit from variable-speed control where airflow demand changes.

Potential applications include:

• Industrial ventilation.
• Exhaust systems.
• Cooling systems.
• Air-handling equipment.
• Dust collection.
• Combustion-air systems.
• Process ventilation.
• Industrial cooling equipment.

The drive allows fan speed to be adjusted to the required operating condition.

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20. Blower Applications

The drive can be used for large blower systems requiring variable operating speed.

Typical applications include:

• Process air.
• Aeration systems.
• Pneumatic conveying.
• Industrial ventilation.
• Combustion air.
• Dust handling.
• Air supply systems.

Blower systems often operate for long periods, so the ability to adjust motor speed according to actual demand can be useful.

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21. Conveyor Applications

The 477 A current capacity makes this model suitable for consideration in large conveyor systems.

Potential applications include:

• Bulk-material conveyors.
• Mining conveyors.
• Aggregate conveyors.
• Production conveyors.
• Heavy-duty belt conveyors.
• Transfer conveyors.
• Warehouse material-handling systems.

Variable-speed operation can allow conveyor speed to be matched to production throughput.

Controlled acceleration can also reduce sudden loading on belts, gearboxes, shafts, and couplings.

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22. Compressor Applications

Large compressors can require controlled motor starting and controlled operating speed.

Potential applications include:

• Industrial air compressors.
• Process compressors.
• Large ventilation compressors.
• Utility compressors.
• Industrial gas systems.

The final drive selection should consider compressor type, torque curve, minimum operating speed, starting requirements, cooling requirements, and motor nameplate current.

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23. Mixer and Agitator Applications

Large mixers and agitators can place considerable torque demands on the motor.

The 175 HP Heavy Duty rating should be considered when the machine experiences substantial starting torque or changing mechanical loads.

Applications can include:

• Chemical processing.
• Water treatment.
• Industrial mixing.
• Material blending.
• Process tanks.
• Bulk-material mixing.
• Production equipment.

For high-inertia mixers, acceleration and braking requirements should be evaluated carefully.

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24. Material-Handling Applications

The drive can be used in material-handling systems requiring controlled motor speed.

Examples include:

• Feed systems.
• Transfer systems.
• Bulk-material handling.
• Production lines.
• Packaging systems.
• Sorting systems.
• Conveyor systems.

Network communication can allow multiple drives to operate as part of a coordinated production system.

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25. Process Industry Applications

The 20G1ANB477JA0NNNNN can be integrated into larger industrial process systems.

Potential applications include:

• Water treatment.
• Manufacturing.
• Industrial utilities.
• Material processing.
• Process ventilation.
• Cooling systems.
• Pumping systems.
• Large rotating machinery.

The drive can operate as the motor-control stage between the plant electrical system and the motor.

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26. Advantages for Pump Systems

Large pump systems often do not require maximum motor speed continuously.

Variable-speed control can allow the pump to follow changing flow or pressure requirements.

Potential advantages include:

• Adjustable flow.
• Controlled pressure.
• Controlled starting.
• Reduced mechanical shock.
• Improved process control.
• Reduced unnecessary operation at maximum speed.

The actual energy performance should be calculated from the pump curve and system operating conditions.

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27. Advantages for Fan Systems

For large fan systems, the drive can regulate motor speed according to required airflow.

This can provide:

• Adjustable airflow.
• Controlled startup.
• Controlled shutdown.
• Reduced mechanical shock.
• Better process control.
• Flexible operating conditions.

The actual efficiency improvement depends on the fan and system characteristics.

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28. Advantages for Conveyor Systems

Conveyors can benefit from controlled motor acceleration.

Instead of applying full motor speed immediately, the drive can ramp the motor to the required operating speed.

This can reduce mechanical stress on:

• Belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Conveyor structures.

Variable speed can also help synchronize different conveyor sections.

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29. Advantages for High-Inertia Loads

High-inertia loads require careful acceleration and deceleration control.

The drive can provide programmed speed ramps, allowing the machine to accelerate and decelerate in a controlled manner.

However, because this particular configuration has no internal dynamic-braking transistor, applications requiring rapid braking need a separate engineered braking strategy.

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30. Advantages for Industrial Automation

The combination of high current capacity and embedded EtherNet/IP makes the drive suitable for networked industrial systems.

A central controller can monitor and coordinate several drives.

Typical control information can include:

• Speed reference.
• Start command.
• Stop command.
• Drive status.
• Current.
• Frequency.
• Fault information.
• Warning information.
• Operating state.

This arrangement can simplify system-level monitoring.

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31. Motor Control

The PowerFlex 755 platform provides configurable motor-control functions suitable for different industrial applications.

Depending on the motor and application, control requirements may include:

• Volts-per-Hertz control.
• Sensorless vector control.
• Flux-oriented control.
• Feedback-based control where the complete system configuration supports it.

The correct control method depends on:

• Motor type.
• Required torque.
• Required speed regulation.
• Low-speed performance.
• Feedback requirements.
• Load characteristics.
• Acceleration requirements.

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32. Motor Selection

The motor should be selected based on its actual electrical and mechanical requirements.

Important motor data includes:

• Rated voltage.
• Full-load current.
• Rated frequency.
• Rated speed.
• Motor power.
• Power factor.
• Efficiency.
• Service factor.
• Insulation system.
• Enclosure.
• Cooling method.

The motor’s full-load current should be compared against the drive’s applicable duty rating.

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33. Cabinet Design

The open-type construction requires suitable installation protection.

A typical cabinet can contain:

• Main disconnect.
• Circuit protection.
• Drive.
• Control power supply.
• Network equipment.
• Terminal blocks.
• Safety equipment.
• PLC or controller equipment.
• Motor cable terminals.

The cabinet should provide adequate clearance around the drive for ventilation and service access.

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34. Cable Selection

Because the drive is rated at 477 A, power-cable selection is an important part of installation engineering.

The cable system should be evaluated for:

• Continuous current.
• Temperature.
• Installation method.
• Voltage rating.
• Insulation.
• Short-circuit withstand capability.
• Cable length.
• Grounding.
• EMC requirements.
• Local electrical requirements.

Multiple conductors may be required depending on the installation design and applicable electrical standards.

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35. Grounding and Bonding

Correct grounding is required for safe and reliable operation.

The installation should include suitable:

• Protective grounding.
• Motor grounding.
• Cabinet bonding.
• Grounding conductors.
• Cable shield termination where applicable.
• Equipment bonding.

A properly designed grounding system can also help reduce electrical noise and improve communication reliability.

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36. Cooling and Heat Management

At 477 A, thermal management is a significant design consideration.

The drive generates heat during operation, and the cabinet must be able to remove that heat.

The system designer should evaluate:

• Drive heat loss.
• Cabinet heat load.
• Ambient temperature.
• Internal cabinet temperature.
• Fan airflow.
• Ventilation openings.
• Air filters.
• Other heat-producing components.
• Cabinet orientation.
• Service access.

Hot air should not be allowed to circulate back through the drive’s cooling-air intake.

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37. Maintenance

Regular maintenance should include inspection of:

• Cooling fans.
• Air passages.
• Electrical terminals.
• Ground connections.
• Motor cables.
• Control wiring.
• Network connections.
• Cabinet ventilation.
• Dust accumulation.
• Signs of overheating.
• Fault history.
• Warning history.

The cooling system deserves particular attention because restricted airflow can increase drive temperature.

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38. Diagnostic Information

Network-connected operation can provide more information than a basic motor starter.

Depending on the system configuration, operators can monitor:

• Output current.
• Output frequency.
• Motor speed.
• Drive status.
• Faults.
• Warnings.
• Operating state.
• Network status.
• Thermal information.

This information can help maintenance personnel investigate problems without relying solely on physical inspection.

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39. Five Same-Series or Closely Related Models

The following models are useful comparison models within the PowerFlex 755 family and the 240/208 V-class range.

Model	Voltage	Current	Normal Duty	Heavy Duty	Frame	Cooling
20G1ANB260JA0NNNNN	240/208 VAC	260 A	100 HP	75 HP	Frame 6	Air Cooled
20G1ANB312JA0NNNNN	240/208 VAC	312 A	125 HP	100 HP	Frame 6	Air Cooled
20G1ANB360JA0NNNNN	240/208 VAC	360 A	150 HP	125 HP	Frame 7	Air Cooled
20G1ANB415JA0NNNNN	240/208 VAC	415 A	175 HP	150 HP	Frame 7	Air Cooled
20G1ANB477JA0NNNNN	240/208 VAC	477 A	200 HP	175 HP	Frame 7	Air Cooled

These models form a useful progression of current and horsepower ratings within the same 240/208 V PowerFlex 755 family. The 477 A model is the largest of the five shown here.

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40. Same-Series Electrical Comparison

Parameter	20G1ANB260JA0NNNNN	20G1ANB312JA0NNNNN	20G1ANB360JA0NNNNN	20G1ANB415JA0NNNNN	20G1ANB477JA0NNNNN
Voltage	240/208 VAC	240/208 VAC	240/208 VAC	240/208 VAC	240/208 VAC
Current	260 A	312 A	360 A	415 A	477 A
Normal Duty	100 HP	125 HP	150 HP	175 HP	200 HP
Heavy Duty	75 HP	100 HP	125 HP	150 HP	175 HP
Approx. ND Power	75 kW	93 kW	112 kW	131 kW	149 kW
Approx. HD Power	56 kW	75 kW	93 kW	112 kW	131 kW
Frame	Frame 6	Frame 6	Frame 7	Frame 7	Frame 7
Cooling	Air Cooled	Air Cooled	Air Cooled	Air Cooled	Air Cooled
Network	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP
Input	AC with Precharge	AC with Precharge	AC with Precharge	AC with Precharge	AC with Precharge
DC Terminals	None	None	None	None	None
Enclosure	Open Type	Open Type	Open Type	Open Type	Open Type

The progression shows how the 20G1ANB477JA0NNNNN increases capacity from the 260 A model through the 312 A, 360 A, and 415 A versions.

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41. Same-Series Mechanical Comparison

Model	Frame	Cooling	Enclosure	Dimensions	Weight
20G1ANB260JA0NNNNN	Frame 6	Air Cooled	Open Type	Verify final drawing	Verify final configuration
20G1ANB312JA0NNNNN	Frame 6	Air Cooled	Open Type	Verify final drawing	Verify final configuration
20G1ANB360JA0NNNNN	Frame 7	Air Cooled	Open Type	Verify final drawing	Verify final configuration
20G1ANB415JA0NNNNN	Frame 7	Air Cooled	Open Type	Verify final drawing	Verify final configuration
20G1ANB477JA0NNNNN	Frame 7	Air Cooled	Open Type	Verify final drawing	Approximately 68 kg planning value

Mechanical dimensions should be verified against the exact catalog drawing before cabinet fabrication.

The 477 A model is a Frame 7 unit and therefore requires more installation space than the smaller Frame 6 models.

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42. Five Same-Brand Reference Models

The following models provide useful reference points from the same brand and related PowerFlex product range.

Model	Voltage	Current	Normal Duty	Heavy Duty	Frame	Cooling
20G1AND156JA0NNNNN	480 VAC	156 A	125 HP	100 HP	Frame 6	Air Cooled
20G1AND248JA0NNNNN	480 VAC	248 A	200 HP	150 HP	Frame 6	Air Cooled
20G1AND302JA0NNNNN	480 VAC	302 A	250 HP	200 HP	Frame 7	Air Cooled
20G1ANC477JA0NNNNN	400 VAC	477 A	270 kW	200 kW	Frame 7	Air Cooled
20G1ANF263JA0NNNNN	690 VAC	263 A	250 kW	200 kW	Frame 7	Air Cooled

These are reference models rather than direct substitutes. The voltage class, motor current, power rating, frame, and complete configuration must all be checked before considering an alternative.

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43. Same-Brand Reference Model Comparison

Parameter	20G1AND156JA0NNNNN	20G1AND248JA0NNNNN	20G1AND302JA0NNNNN	20G1ANC477JA0NNNNN	20G1ANF263JA0NNNNN
Voltage	480 VAC	480 VAC	480 VAC	400 VAC	690 VAC
Current	156 A	248 A	302 A	477 A	263 A
Normal Duty	125 HP	200 HP	250 HP	270 kW	250 kW
Heavy Duty	100 HP	150 HP	200 HP	200 kW	200 kW
Frame	Frame 6	Frame 6	Frame 7	Frame 7	Frame 7
Cooling	Air Cooled	Air Cooled	Air Cooled	Air Cooled	Air Cooled
Network	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP
Enclosure	Open Type	Open Type	Open Type	Open Type	Open Type
Typical Use	Industrial Motors	Large Motors	High-Power Motors	400 V Process Systems	High-Voltage Motors

The models above demonstrate how the same general drive family covers multiple industrial voltage classes.

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44. Comparison With 20G1ANB415JA0NNNNN

The 20G1ANB415JA0NNNNN is a lower-current member of the same 240/208 V class.

Parameter	20G1ANB415JA0NNNNN	20G1ANB477JA0NNNNN
Voltage	240/208 VAC	240/208 VAC
Current	415 A	477 A
Normal Duty	175 HP	200 HP
Heavy Duty	150 HP	175 HP
Frame	Frame 7	Frame 7
Cooling	Air Cooled	Air Cooled
Enclosure	Open Type	Open Type
Network	EtherNet/IP	EtherNet/IP

The 477 A model provides an additional 62 A of current capacity and a higher motor-power rating.

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45. Comparison With 20G1ANB360JA0NNNNN

Parameter	20G1ANB360JA0NNNNN	20G1ANB477JA0NNNNN
Voltage	240/208 VAC	240/208 VAC
Current	360 A	477 A
Normal Duty	150 HP	200 HP
Heavy Duty	125 HP	175 HP
Frame	Frame 7	Frame 7
Cooling	Air Cooled	Air Cooled
Enclosure	Open Type	Open Type
Network	EtherNet/IP	EtherNet/IP

The 477 A model provides significantly greater current capacity than the 360 A model and is appropriate where the motor load exceeds the smaller drive’s applicable rating.

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46. Comparison With 20G1ANB312JA0NNNNN

Parameter	20G1ANB312JA0NNNNN	20G1ANB477JA0NNNNN
Voltage	240/208 VAC	240/208 VAC
Current	312 A	477 A
Normal Duty	125 HP	200 HP
Heavy Duty	100 HP	175 HP
Frame	Frame 6	Frame 7
Cooling	Air Cooled	Air Cooled
Enclosure	Open Type	Open Type
Network	EtherNet/IP	EtherNet/IP

The change from Frame 6 to Frame 7 is important when planning the physical installation.

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47. Comparison With 480 VAC Models

The 480 VAC PowerFlex 755 models belong to a different voltage class.

For example, a 477 A 480 VAC PowerFlex 755 configuration is rated at 400 HP Normal Duty and 300 HP Heavy Duty.

The 20G1ANB477JA0NNNNN is rated at 200 HP Normal Duty and 175 HP Heavy Duty because it operates at the much lower 240/208 VAC voltage class.

This illustrates why current rating and horsepower cannot be compared without considering the voltage class.

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48. Comparison With 400 VAC Models

The 400 VAC PowerFlex 755 range includes models using kW ratings.

For example, the 20G1ANC477JA0NNNNN is rated at 477 A, 270 kW Normal Duty, and 200 kW Heavy Duty at 400 VAC.

Although the current rating is the same as the 20G1ANB477JA0NNNNN, the higher voltage produces a significantly different motor-power rating.

The two models therefore should not be treated as interchangeable.

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49. Application Matching Table

Application	Typical Duty Consideration	Reason for Using a Drive
Large Centrifugal Pump	Normal Duty	Flow and pressure control
Large Fan	Normal Duty	Airflow control
Large Blower	Normal Duty	Variable process demand
Heavy Conveyor	Heavy Duty	Starting and acceleration torque
Bulk Conveyor	Heavy Duty	Load variation
Large Mixer	Heavy Duty	High starting torque
Process Pump	Normal Duty / Application Dependent	Process regulation
Compressor	Application Dependent	Speed and torque control
Material Handling	Heavy Duty	Controlled acceleration
High-Inertia Machine	Heavy Duty	Controlled speed changes
Industrial Cooling	Normal Duty	Variable operating demand
Production Line	Application Dependent	Coordinated motor control

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50. Installation Checklist

Installation Item	Requirement
Model	20G1ANB477JA0NNNNN
Input Voltage	240/208 VAC
Input Phase	3 Phase
Current	477 A
Normal Duty	200 HP
Heavy Duty	175 HP
Frame	Frame 7
Cooling	Forced Air
Enclosure	IP20/IP00 Open Type
Network	Embedded EtherNet/IP
Input	AC with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Cabinet	Required for protected installation
Ventilation	Required
Grounding	Required
Motor Cable	Properly sized for motor and installation
Braking	Separate evaluation required where rapid braking is needed
Dimensions	Verify final mechanical drawing
Weight	Verify final supplied configuration; approximately 68 kg planning value
Service Clearance	Must be provided
Lifting	Plan according to final equipment weight

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51. Cabinet and Floor-Loading Considerations

A 477 A Frame 7 drive is a substantial industrial component.

The cabinet should have enough structural strength to support the equipment and associated cabling.

The approximate 68 kg planning weight should not be treated as the final certified shipping weight.

When the equipment is mounted in a cabinet, the total assembly weight can be considerably higher because of:

• Input protection.
• Disconnects.
• Power cables.
• Network equipment.
• Control components.
• Terminal blocks.
• Cooling equipment.
• Cabinet structure.

For floor-mounted cabinets, total floor loading should therefore be calculated from the complete finished assembly.

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52. Transportation and Handling

The drive should be handled according to the final equipment weight and mechanical configuration.

Before moving the drive:

• Confirm the actual equipment weight.
• Check the lifting arrangement.
• Protect the drive from impact.
• Keep the drive upright where required.
• Prevent cable or terminal damage.
• Use suitable mechanical handling equipment.

For cabinet-mounted equipment, the complete cabinet weight should be considered rather than the drive weight alone.

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53. Environmental Considerations

The open-type construction means that environmental protection is normally provided by the installation enclosure.

The installation should be evaluated for:

• Temperature.
• Humidity.
• Condensation.
• Dust.
• Corrosive atmosphere.
• Oil mist.
• Vibration.
• Altitude.
• Ventilation.
• Contamination.

A suitable cabinet can provide the required environmental protection while allowing the drive to operate with adequate cooling.

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54. Maintenance Planning

A practical maintenance program should include regular inspection of:

Cooling System

Check fans, ventilation paths, and signs of overheating.

Electrical Connections

Inspect power and control terminals for signs of loosening, overheating, or damage.

Motor Cable

Check insulation, grounding, mechanical damage, and termination.

Network

Check network connections and communication status.

Cabinet

Check dust accumulation, airflow, filters, and signs of excessive temperature.

Drive Diagnostics

Review faults, warnings, operating data, and abnormal current conditions.

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55. Product Selection Guidelines

When selecting the 20G1ANB477JA0NNNNN, the following information should be available:

1. Motor rated voltage.
2. Motor full-load current.
3. Motor horsepower or kW.
4. Motor rated frequency.
5. Motor speed.
6. Load type.
7. Starting torque.
8. Required acceleration time.
9. Required deceleration time.
10. Braking requirements.
11. Ambient temperature.
12. Cabinet cooling method.
13. Available input voltage.
14. Available short-circuit current.
15. Motor cable length.
16. Communication requirements.
17. Environmental conditions.
18. Required duty class.

This information provides a much more reliable basis for drive selection than horsepower alone.

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56. Product Advantages in Practical Use

The 20G1ANB477JA0NNNNN is particularly useful where the motor needs to operate at different speeds during normal production.

For a large pump, the motor speed can be adjusted according to process demand.

For a fan, the speed can be adjusted according to airflow requirements.

For a conveyor, the speed can be coordinated with material flow.

For a mixer, acceleration and operating speed can be programmed according to the process.

For industrial machinery, the drive can exchange status and operating information with the control system through EtherNet/IP.

The result is a motor-control system that can be integrated into the machine rather than functioning as a standalone starter.

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57. Final Technical Specification Table

Parameter	Specification
Model	20G1ANB477JA0NNNNN
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Voltage Class	240/208 VAC
Phase	Three Phase
Current Rating	477 A
Normal Duty Rating	200 HP
Heavy Duty Rating	175 HP
Approx. Normal Duty Power	149 kW
Approx. Heavy Duty Power	131 kW
Frame	Frame 7
Cooling	Forced Air
Enclosure	IP20/IP00
Enclosure Type	NEMA/UL Open Type
Communication	Embedded EtherNet/IP
Input	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Mounting	Vertical
Main Applications	Pumps, Fans, Blowers, Conveyors, Compressors, Mixers, Process Machinery
Dimensions	Verify final Frame 7 mechanical drawing
Planning Weight	Approximately 68 kg
Exact Weight	Verify final supplied configuration
Cabinet Installation	Required
Cooling Arrangement	Forced Air
Primary Function	Variable-Speed Motor Control

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58. Product Identification Summary

Identification	Description
Full Model	20G1ANB477JA0NNNNN
Brand	Allen-Bradley
Family	PowerFlex
Series	PowerFlex 755
Product Category	Industrial AC Drive
Voltage	240/208 VAC
Phase	3 Phase
Current	477 A
Normal Duty	200 HP
Heavy Duty	175 HP
Frame	Frame 7
Cooling	Forced Air
Enclosure	IP20/IP00 Open Type
Network	Embedded EtherNet/IP
Input	AC with Precharge
DC Terminals	None
Filter	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Approx. ND Power	149 kW
Approx. HD Power	131 kW
Dimensions	Verify final mechanical drawing
Planning Weight	Approximately 68 kg
Main Function	Large-Motor Variable-Speed Control

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59. Overall Product Description

The Allen-Bradley 20G1ANB477JA0NNNNN is a high-current PowerFlex 755 AC drive designed for three-phase 240/208 VAC industrial motor systems.

Its 477 A current rating and 200 HP Normal Duty rating place it at the high-capacity end of the 240 V-class PowerFlex 755 range. The Heavy Duty rating is 175 HP. The drive uses Frame 7 construction and forced-air cooling.

The model is configured with embedded EtherNet/IP communication, allowing it to be integrated into a networked automation system. It can exchange operating commands and drive information with the main control system, making it suitable for multi-drive production lines and process equipment.

The AC input with precharge and no DC terminals configuration identifies the drive as an AC-input unit. The filtered configuration and installed CM jumper form part of the specified electrical configuration.

One important configuration detail is that this catalog number has no internal dynamic-braking transistor. Therefore, applications requiring rapid deceleration or substantial regenerative-energy handling should be evaluated separately for their braking requirements.

The open-type IP20/IP00 construction means the drive should normally be installed in an appropriate protected electrical enclosure. Cabinet ventilation, grounding, cable routing, service clearance, and environmental protection should all be considered during installation.

The 20G1ANB477JA0NNNNN can be used for large pumps, fans, blowers, conveyors, compressors, mixers, material-handling systems, cooling equipment, process machinery, and other industrial applications where a large three-phase motor requires adjustable speed and controlled operation.

For pump and fan systems, the main advantage is the ability to match motor speed to process demand.

For conveyor and material-handling systems, controlled acceleration and deceleration can help reduce mechanical shock.

For process equipment, adjustable speed can provide more precise control of production conditions.

For networked automation systems, embedded EtherNet/IP allows the drive to communicate directly with the control architecture.

For cabinet design, the drive should be treated as a substantial Frame 7 component. Exact height, width, depth, and delivered weight should be taken from the final mechanical documentation. An approximate 68 kg figure can be used only as a preliminary planning value, not as a certified exact weight for every configuration.

Overall, the 20G1ANB477JA0NNNNN is a large-capacity PowerFlex 755 drive intended for industrial motor systems where 240/208 VAC three-phase power, 477 A current capacity, 200 HP Normal Duty operation, 175 HP Heavy Duty operation, forced-air cooling, open-type cabinet installation, and networked motor control are required.