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Allen-Bradley 20G11TD485AN0NNNNN PowerFlex 755 AC Drive – Detailed Specifications, Product Introduction, Applications, Advantages and Related Models

1. Product Overview

The 20G11TD485AN0NNNNN is a high-power industrial AC drive in the PowerFlex 755 series. It is designed for large three-phase AC motor applications where high current capacity, adjustable speed, controlled acceleration and reliable industrial operation are required.

This model is intended for a 480 VAC three-phase power system and belongs to the high-current Frame 8 range. Its output current is approximately 485 A for Normal Duty, placing it above the 430 A class and making it suitable for larger motors and more demanding mechanical systems.

Under the standard duty classifications, this drive is commonly associated with approximately 450 HP Light Duty, 400 HP Normal Duty and 350 HP Heavy Duty motor applications.

The 20G11TD485AN0NNNNN is particularly suitable for large conveyors, pumps, fans, blowers, compressors, material-handling systems, mining equipment, process machinery and other industrial machines requiring substantial motor power.

Its open-type construction means that it is normally incorporated into a suitable electrical cabinet or industrial control enclosure. The large Frame 8 structure also means that installation planning needs to consider cabinet dimensions, ventilation, cable routing, lifting and floor loading.

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2. Brand and Product Series

Product Information	Details
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Model	20G11TD485AN0NNNNN
Product Type	High-Performance AC Drive
Drive Category	Industrial Variable Frequency Drive
Input Voltage Class	480 VAC
Input Phase	Three Phase
Cooling Method	Forced Air / Air Cooled
Frame	Frame 8
Enclosure Type	Open Type / IP00
Input Arrangement	AC Input with Precharge
DC Terminals	Included
Communication	Ethernet/IP capable configuration
Dynamic Braking	Not included in this catalog configuration
HIM	Blank / No HIM configuration
Application	Large Industrial Motor Control

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3. Main Technical Parameters

Parameter	Specification
Model	20G11TD485AN0NNNNN
Product Series	PowerFlex 755
Product Type	High-Performance AC Variable Frequency Drive
Input Voltage	480 VAC
Input Phase	3 Phase
Input Frequency	47–63 Hz
Nominal DC Bus Class	Approximately 650 VDC
Normal Duty Output Current	485 A
Normal Duty Motor Rating	400 HP
Normal Duty Motor Rating	Approximately 300 kW
Light Duty Motor Rating	450 HP
Heavy Duty Motor Rating	350 HP
Output Phase	3 Phase
Output Frequency	Up to approximately 400 Hz, application dependent
Cooling	Forced Air
Frame Size	Frame 8
Enclosure	Open Type / IP00
Input Configuration	AC Input with Precharge
DC Terminals	Yes
Filtering	Filtered Configuration
Communication	Embedded Ethernet/IP capability
HIM	Blank / No HIM
Dynamic Braking	None in standard configuration
Common-Mode Configuration	Configuration dependent
Operating Temperature	Approximately 0–40 °C at rated conditions
Storage Temperature	Approximately -40–70 °C
Installation	Industrial cabinet / protected electrical enclosure
Approximate Drive Weight	Approximately 80 kg
Typical Frame 8 Cabinet Height	Approximately 2450 mm class
Typical Frame 8 Cabinet Width	Approximately 600 mm class
Typical Frame 8 Cabinet Depth	Approximately 600–800 mm class
Drive Mechanical Envelope	Configuration dependent
Mounting	Vertical industrial installation

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4. Duty Ratings

The 20G11TD485AN0NNNNN is a high-current drive, but the actual motor horsepower depends on the selected duty classification.

Duty Classification	Approximate Current	Motor Rating
Light Duty	Approximately 545 A class	450 HP
Normal Duty	485 A	400 HP
Heavy Duty	Approximately 420 A class	350 HP

The 400 HP Normal Duty rating is the key reference point for this model.

For a machine with frequent acceleration, high starting torque, shock loading or significant overload requirements, the Heavy Duty rating should be used when determining the appropriate drive size.

Motor selection should not be based on horsepower alone. Motor full-load current, overload requirements, mechanical load, acceleration time and operating temperature should all be considered.

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5. Product Description

The 20G11TD485AN0NNNNN is designed to control large industrial AC motors by adjusting the electrical output delivered to the motor.

A conventional fixed-speed motor system normally operates at a relatively fixed speed determined by the power frequency and motor characteristics. An AC drive provides much greater flexibility by allowing the motor speed to be changed according to the process.

This is particularly useful in industrial applications where production requirements change throughout the day.

For example, a conveyor may need to operate at different speeds depending on material flow. A pump may need to increase or decrease flow. A fan may need to adjust airflow. A large process machine may require a controlled speed profile during production.

The drive can therefore become an important part of the overall machine-control system rather than simply acting as a motor starter.

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6. Main Product Characteristics

6.1 High Output Current

The drive provides approximately 485 A Normal Duty output capacity.

This places it in the high-current industrial-drive category and makes it appropriate for motors considerably larger than those normally controlled by compact VFD products.

The high current rating is particularly useful when a motor requires significant current during acceleration or when the mechanical load changes rapidly.

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6.2 400 HP Normal Duty Capability

The approximately 400 HP Normal Duty rating corresponds to roughly 300 kW of motor power.

This makes the drive suitable for large industrial motors used in:

• Heavy conveyors
• Large pumps
• Industrial fans
• Blowers
• Compressors
• Material-handling equipment
• Mining machinery
• Processing equipment

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6.3 450 HP Light Duty Rating

For applications with a less demanding overload profile, the drive can be considered in the approximately 450 HP Light Duty range.

This provides additional flexibility when the motor operates with relatively stable loading and does not require the same overload capability as a heavy-duty machine.

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6.4 350 HP Heavy Duty Rating

For applications with more demanding torque and overload requirements, the Heavy Duty rating is approximately 350 HP.

This distinction is important for applications such as crushers, loaded conveyors and machines with frequent acceleration cycles.

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7. Electrical Specifications

Electrical Parameter	Value
Input Voltage	480 VAC
Input Phase	3 Phase
Input Frequency	47–63 Hz
Normal Duty Current	485 A
Normal Duty Motor Rating	400 HP
Normal Duty Motor Rating	Approx. 300 kW
Light Duty Motor Rating	450 HP
Heavy Duty Motor Rating	350 HP
Output Phase	3 Phase
Output Frequency	Up to approximately 400 Hz
DC Bus Class	Approximately 650 VDC
Cooling	Forced Air
Input Precharge	Yes
DC Terminals	Yes
Dynamic Braking	None in standard configuration

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8. Dimensions and Weight

Because this is a large Frame 8 drive, dimensions should be considered together with the final cabinet arrangement.

The drive assembly and complete cabinet are not necessarily the same size.

A practical reference for a Frame 8 installation is shown below.

Mechanical Parameter	Approximate Value
Model	20G11TD485AN0NNNNN
Frame	Frame 8
Enclosure	Open Type / IP00
Typical Cabinet Height	Approximately 2450 mm
Typical Cabinet Width	Approximately 600 mm
Typical Cabinet Depth	Approximately 600–800 mm
Approximate Drive Weight	Approximately 80 kg
Complete Cabinet Weight	Configuration dependent
Cooling	Forced Air
Mounting Direction	Vertical
Installation Type	Cabinet / electrical enclosure
Service Clearance	Required around the drive
Lifting Requirement	Depends on final assembly

The approximately 80 kg reference should be regarded as a drive-assembly figure rather than the weight of a complete industrial cabinet.

A completed cabinet can weigh considerably more because it may include disconnect equipment, protection devices, busbars, control equipment, terminals, communication components, wiring and cooling equipment.

For transportation, lifting and floor-loading calculations, the final assembled configuration should always be used.

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9. Product Applications

9.1 Large Conveyor Systems

Large conveyors are one of the most suitable applications for the 20G11TD485AN0NNNNN.

A heavily loaded conveyor can require considerable torque during acceleration. Starting the motor directly at full line voltage can place stress on the motor, gearbox, coupling and conveyor structure.

An AC drive provides controlled acceleration and adjustable operating speed.

Typical applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk material conveyors
• Port handling systems
• Production conveyors
• Heavy manufacturing conveyors
• Long-distance material transport

The ability to adjust speed can also help match the conveyor to upstream and downstream equipment.

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10. Pump Applications

Large industrial pumps can benefit significantly from variable-speed operation.

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

Potential applications include:

• Water treatment
• Industrial water circulation
• Cooling-water systems
• Mining dewatering
• Process pumping
• Irrigation
• Large circulation systems
• Industrial pumping stations

For variable-torque pump applications, reducing motor speed can substantially reduce the power required by the pump system.

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11. Fan Applications

Large fans often operate under changing airflow requirements.

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

Potential applications include:

• Industrial ventilation
• Furnace exhaust
• Dust collection
• Process ventilation
• Large cooling fans
• Mining ventilation
• Industrial air handling
• Exhaust systems

This provides better airflow control and can reduce unnecessary energy consumption under reduced-load conditions.

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12. Blower Applications

Industrial blowers can have large motors and long operating cycles.

The drive can provide adjustable speed and controlled acceleration.

Typical applications include:

• Process blowers
• Air supply systems
• Dust removal
• Combustion-air systems
• Industrial ventilation
• Pneumatic process systems

The drive is particularly useful when blower output needs to change with production demand.

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13. Compressor Applications

Large compressors can require controlled acceleration because of their motor size and mechanical characteristics.

The drive can provide a controlled motor start and adjustable speed where variable-speed operation is supported by the compressor.

Potential applications include:

• Industrial air compressors
• Process compressors
• Gas-handling equipment
• Manufacturing plants
• Large pneumatic systems

Compressor applications require careful consideration of the compressor’s torque curve and permissible operating speed.

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14. Mining Applications

The high current capacity of the 20G11TD485AN0NNNNN makes it appropriate for many mining and mineral-processing systems.

Potential applications include:

• Mining conveyors
• Crushers
• Feeders
• Screens
• Large pumps
• Ventilation fans
• Material-processing machinery
• Bulk handling systems

Mining equipment can experience significant overloads and mechanical shocks, so Heavy Duty sizing should be considered where required.

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15. Aggregate and Cement Applications

Aggregate and cement equipment often operates continuously under demanding conditions.

The drive can be used with:

• Crushers
• Conveyors
• Fans
• Pumps
• Feeders
• Mixers
• Material handling equipment
• Processing systems

The ability to control acceleration and operating speed can help reduce mechanical stress and improve process control.

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16. Material Handling Applications

The drive is suitable for large material-handling machinery where speed control is important.

Examples include:

• Bulk material transport
• Heavy conveyors
• Transfer systems
• Feeders
• Production-line transport
• Industrial handling systems

For equipment with significant regenerative energy, the complete braking and regenerative system must be designed separately.

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17. Large Process Machinery

The 20G11TD485AN0NNNNN can also be applied to large industrial process machines.

Examples include:

• Mixers
• Agitators
• Extrusion machinery
• Large rotating equipment
• Processing machines
• Production machinery
• Industrial machine systems

Speed control can be used to match the motor to the required production process.

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18. Main Product Advantages

18.1 High-Power Capability

The main advantage is the ability to control motors around the 400 HP Normal Duty range.

This makes the drive suitable for large industrial machines where smaller drives would not provide enough current capacity.

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18.2 High Current Capacity

The approximately 485 A Normal Duty output provides substantial electrical capacity.

This is especially useful for motors with high full-load current and machines that require considerable torque during acceleration.

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18.3 Adjustable Motor Speed

The drive allows motor speed to be adjusted rather than operating at one fixed speed.

This can improve process flexibility.

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18.4 Controlled Acceleration

Large motors can create significant mechanical shock when started directly.

Controlled acceleration can reduce stress on:

• Shafts
• Couplings
• Gearboxes
• Belts
• Bearings
• Conveyor structures
• Pumps
• Fans

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18.5 Controlled Deceleration

Controlled deceleration can provide smoother stopping and better control of the machine.

The required braking method depends on the mechanical load and system configuration.

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18.6 Industrial Network Capability

The PowerFlex 755 platform supports integration into industrial automation systems.

This allows drive commands, status and diagnostic information to be exchanged with the larger control system.

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18.7 Broad Application Range

The same general drive platform can be used for many types of industrial equipment.

This reduces the need to use completely different drive architectures across a large production facility.

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19. Energy Efficiency Advantages

The drive itself does not guarantee energy savings, but variable-speed control can produce significant savings when the motor load is suitable for speed regulation.

This is especially relevant to:

• Pumps
• Fans
• Blowers

For these applications, operating at reduced speed can substantially lower mechanical power demand.

For conveyors and process equipment, energy benefits depend more strongly on the load profile and operating strategy.

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20. Automation and Communication

The 20G11TD485AN0NNNNN belongs to a drive platform intended for integration with industrial automation systems.

Communication can be used for:

• Start and stop commands
• Speed references
• Operating status
• Fault information
• Diagnostic data
• Current monitoring
• Frequency monitoring
• Parameter management

This can reduce the need for large amounts of discrete control wiring and allows the drive to become part of the machine’s overall control architecture.

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21. Maintenance Considerations

Because the drive uses forced-air cooling, cooling performance is an important part of routine maintenance.

Recommended maintenance activities include:

• Inspecting cooling fans
• Checking airflow passages
• Cleaning dust accumulation
• Checking cabinet ventilation
• Inspecting electrical terminals
• Checking grounding connections
• Checking motor cables
• Reviewing fault history
• Inspecting environmental conditions
• Maintaining parameter backups

In mining, cement, aggregate and dusty manufacturing environments, keeping ventilation paths clean is particularly important.

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22. Installation Considerations

The 20G11TD485AN0NNNNN is a high-voltage, high-current industrial product.

Installation should take into account:

Electrical Requirements

• 480 VAC three-phase supply
• Correct branch protection
• Correct cable sizing
• Grounding
• Motor cable selection
• Short-circuit capability
• Control wiring
• Communication wiring
• EMC considerations

Mechanical Requirements

• Cabinet dimensions
• Mounting structure
• Service access
• Drive weight
• Lifting arrangements
• Floor loading

Thermal Requirements

• Cabinet airflow
• Cooling capacity
• Ambient temperature
• Heat dissipation
• Clearance around ventilation areas

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23. Five Recommended Models From the Same Series

The following models are closely related PowerFlex 755 configurations and are useful when a different power level is required.

Model	Voltage	Light Duty	Normal Duty	Heavy Duty	Frame	Approx. Dimensions	Approx. Weight
20G11TD430AN0NNNNN	480 VAC	400 HP	350 HP	300 HP	Frame 8	Approx. 2450 × 600 × 600–800 mm cabinet class	Configuration dependent
20G11TD545AN0NNNNN	480 VAC	500 HP	450 HP	350 HP	Frame 8	Approx. 2450 × 600 × 600–800 mm class	Configuration dependent
20G11TD617AN0NNNNN	480 VAC	600 HP	500 HP	400 HP	Frame 8	Approx. 2450 × 600 × 600–800 mm class	Configuration dependent
20G11TD710AN0NNNNN	480 VAC	650 HP	600 HP	450 HP	Frame 8	Approx. 2450 × 600 × 600–800 mm class	Configuration dependent
20G11TD740AN0NNNNN	480 VAC	700 HP	650 HP	500 HP	Frame 8	Approx. 2450 × 600 × 600–800 mm class	Configuration dependent

These models provide a useful range around the 485 A model.

The 20G11TD430AN0NNNNN is the lower-power option in this group.

The 20G11TD545AN0NNNNN is the next significant step upward.

The 617 A, 710 A and 740 A configurations are intended for progressively larger motors.

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24. Same-Series Comparison

Model	Approx. Normal Duty Current	Normal Duty Motor Rating	Heavy Duty Motor Rating	Application Position
20G11TD430AN0NNNNN	430 A	350 HP	300 HP	Lower-power option
20G11TD485AN0NNNNN	485 A	400 HP	350 HP	Reference model
20G11TD545AN0NNNNN	545 A	450 HP	350 HP	Higher-power option
20G11TD617AN0NNNNN	617 A	500 HP	400 HP	Large motor
20G11TD710AN0NNNNN	710 A	600 HP	450 HP	Very large motor
20G11TD740AN0NNNNN	740 A	650 HP	500 HP	Extra-high power

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25. Five Related Models From the Same Brand

For applications where a different current, power level or voltage class is required, the following models are useful related choices.

Model	Series	Voltage Class	Approximate Power Position	Typical Application	Approx. Dimensions	Weight
20G11TD430JN0NNNNN	PowerFlex 755	480 VAC	350 HP ND	Replacement / lower current	Frame 8 class	Configuration dependent
20G11TD545JN0NNNNN	PowerFlex 755	480 VAC	450 HP ND	Larger industrial motor	Frame 8 class	Configuration dependent
20G11TD617JN0NNNNN	PowerFlex 755	480 VAC	500 HP ND	Large conveyor / process equipment	Frame 8 class	Configuration dependent
20G11TE395AN0NNNNN	PowerFlex 755	600 VAC	Large motor class	600 V industrial systems	Large-frame class	Configuration dependent
20G11TF370AN0NNNNN	PowerFlex 755	690 VAC	Large motor class	690 V industrial systems	Large-frame class	Configuration dependent

The first three are particularly relevant when the electrical system remains within the 480 VAC PowerFlex 755 range.

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26. Five Popular Models From the Same Brand

For a broader product selection, the following models cover smaller and medium industrial applications as well as larger systems.

Model	Product Series	Voltage Class	Approximate Power Class	Typical Application	Approx. Dimensions	Approx. Weight
25B-D024N114	PowerFlex 525	480 VAC	Approx. 10 HP class	Pumps, fans, conveyors, machinery	Compact frame	Approx. 4 kg class
25B-D6P0N114	PowerFlex 525	480 VAC	Approx. 2 HP class	Small industrial machines	Compact frame	Approx. 1–2 kg class
20F11NC3P4JA0NNNNN	PowerFlex 753	480 VAC	Approx. 3 HP class	General industrial control	Small frame	Configuration dependent
20F11ND077AA0NNNNN	PowerFlex 753	480 VAC	Approx. 30 HP class	Pumps, fans and conveyors	Medium frame	Configuration dependent
25C-D043N114	PowerFlex 523	480 VAC	Approx. 20 HP class	General-purpose motor control	Compact frame	Approx. 10 kg class

These models are not direct substitutes for the 20G11TD485AN0NNNNN.

They are better viewed as examples of other popular drive configurations covering different motor sizes and application requirements.

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27. Product Family Comparison

Series	General Position	Typical Motor Range	Typical Applications
PowerFlex 523	Compact General Purpose	Small to medium	Fans, pumps, small machines
PowerFlex 525	Compact Advanced	Small to medium	Machine automation, pumps, conveyors
PowerFlex 753	Industrial Drive	Medium to large	Pumps, fans, conveyors, industrial machinery
PowerFlex 755	High-Performance Drive	Medium to very large	Mining, conveyors, process machinery
PowerFlex 755T	Advanced High-Performance	Large industrial motors	Advanced and regenerative systems

The 20G11TD485AN0NNNNN sits toward the high-power end of this product range.

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28. Application Selection Guide

Application	Recommended Drive Range	Main Selection Factor
Large Conveyor	430–617 A class	Starting torque
Mining Conveyor	485–710 A class	Overload and mechanical shock
Large Pump	430–545 A class	Variable-torque operation
Large Fan	430–545 A class	Continuous operation
Large Blower	430–617 A class	Airflow requirement
Compressor	430–617 A class	Torque and acceleration
Crusher	545–710 A class	Heavy overload
Large Feeder	430–617 A class	Starting torque
Bulk Material System	485–710 A class	Mechanical loading
Large Process Machine	430–617 A class	Speed regulation
Existing 400 HP Motor	20G11TD485AN0NNNNN	Motor current and duty

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29. Advantages Compared With a Smaller VFD

The 20G11TD485AN0NNNNN is primarily valuable because of its large current and horsepower capability.

A compact VFD may be easier to install and less expensive, but it cannot replace a high-current drive when the motor requires several hundred amperes.

For large machines, the additional capability of the PowerFlex 755 platform can also simplify the control architecture.

The drive can provide motor control, speed adjustment, diagnostics and communication within the same overall automation system.

This is particularly useful in large production facilities where multiple motors must operate as part of one coordinated process.

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30. Benefits for Conveyors

For conveyors, the main advantages are:

• Controlled acceleration
• Adjustable conveyor speed
• Reduced mechanical shock
• Better process synchronization
• Controlled stopping
• Motor protection
• Diagnostic information
• Automation-system integration

These functions are especially valuable for long conveyors and heavily loaded systems.

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31. Benefits for Pumps and Fans

For pumps and fans, the most important benefit is the ability to match motor speed to process demand.

This can provide:

• Better flow control
• Better pressure control
• Better airflow control
• Reduced mechanical throttling
• Potential energy savings
• Improved process stability

The actual energy benefit depends on the system and operating conditions.

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32. Benefits for Mining Equipment

Mining equipment can be exposed to harsh operating conditions and substantial mechanical loads.

The drive’s high current capacity makes it suitable for large motors used in:

• Conveyors
• Crushers
• Pumps
• Fans
• Feeders
• Processing systems

Correct enclosure selection and environmental protection are especially important in mining installations.

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33. Benefits for OEM Equipment

For machine manufacturers, the PowerFlex 755 platform can provide a standardized approach to large-motor control.

A machine builder can use the same general control philosophy for different motor sizes while changing the drive rating according to the motor.

This can simplify:

• Programming
• Commissioning
• Troubleshooting
• Maintenance
• Operator training
• Spare-parts planning

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34. Important Selection Considerations

Before selecting the 20G11TD485AN0NNNNN, the following should be checked.

Item	Reason
Motor Full-Load Current	Must be within the drive capability
Motor HP	Determines basic power requirement
Motor kW	Alternative power rating
Duty Cycle	Determines overload requirement
Starting Torque	Important for heavy machinery
Acceleration Time	Affects current demand
Mechanical Load	Determines actual drive sizing
Input Voltage	Must match 480 VAC system
Input Frequency	Must be compatible
Cooling	Required for thermal management
Cabinet Size	Required for physical installation
Drive Weight	Required for lifting and transport
Communication	Must match control architecture
Feedback	Required for applications needing feedback control
Braking	Important for high-inertia loads
Ambient Temperature	May affect available rating
Altitude	May require derating
Environment	Dust and moisture protection must be considered

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35. Maintenance and Service

The 20G11TD485AN0NNNNN is a high-power industrial device and should be maintained as part of the machine’s overall preventive-maintenance program.

Important service areas include:

Cooling

Check cooling fans, ventilation openings and cabinet airflow regularly.

Electrical Connections

Large-current connections should be inspected according to the maintenance schedule.

Environment

Dust, moisture and corrosive contamination should be controlled.

Motor System

Motor cables, grounding and motor insulation should be inspected as part of the overall motor-drive system.

Parameters

Important drive parameters should be backed up so that the configuration can be restored after service or replacement.

Fault History

Drive fault and alarm information can be useful for identifying recurring problems.

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36. Overall Advantages and Limitations

Category	Assessment
Motor Power	Excellent for large motors
Current Capacity	Very High
Speed Control	Excellent
Conveyor Applications	Highly Suitable
Pump Applications	Highly Suitable
Fan Applications	Highly Suitable
Mining Applications	Suitable with correct duty selection
Process Machinery	Highly Suitable
Automation Integration	Excellent
Cabinet Integration	Suitable
Physical Size	Large
Weight	Heavy compared with compact drives
Installation Complexity	High
Small Motor Applications	Generally excessive
Large Motor Applications	Excellent

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37. Quick Reference Specification Table

Parameter	Value
Brand	Allen-Bradley
Series	PowerFlex 755
Model	20G11TD485AN0NNNNN
Product Type	High-Performance AC Drive
Input Voltage	480 VAC
Input Phase	3 Phase
Input Frequency	47–63 Hz
Normal Duty Current	485 A
Normal Duty Motor Rating	400 HP
Normal Duty Motor Rating	Approximately 300 kW
Light Duty Rating	450 HP
Heavy Duty Rating	350 HP
Cooling	Forced Air
Frame	Frame 8
Enclosure	Open Type / IP00
Input	AC with Precharge
DC Terminals	Yes
Communication	Ethernet/IP capable
HIM	Blank / No HIM
Dynamic Braking	None in standard configuration
Approximate Drive Weight	Approximately 80 kg
Typical Cabinet Height	Approximately 2450 mm
Typical Cabinet Width	Approximately 600 mm
Typical Cabinet Depth	Approximately 600–800 mm
Installation	Industrial Cabinet
Main Applications	Conveyors, pumps, fans, blowers, compressors, mining, process machinery

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38. Final Product Evaluation

The 20G11TD485AN0NNNNN is a high-power PowerFlex 755 AC drive intended for large industrial motors and demanding motor-control applications.

Its key rating is approximately 485 A Normal Duty, corresponding to approximately 400 HP / 300 kW.

The combination of 480 VAC three-phase operation, high output current, Frame 8 construction, forced-air cooling, industrial communication capability, AC precharge and DC terminals makes it suitable for large motor systems where a compact VFD would not have sufficient capacity.

The product is particularly well suited to large conveyors, mining machinery, pumps, fans, blowers, compressors, material-handling systems and industrial process equipment.

For applications requiring a lower power rating, the 20G11TD430AN0NNNNN is a logical related model.

For higher-power applications, the 20G11TD545AN0NNNNN, 20G11TD617AN0NNNNN, 20G11TD710AN0NNNNN and 20G11TD740AN0NNNNN provide progressively greater capacity.

When choosing a replacement or alternative, the most important factors are not only horsepower and voltage. Motor full-load current, duty cycle, overload requirement, starting torque, mechanical inertia, braking requirements, ambient temperature, cabinet dimensions and communication requirements should all be checked.

Overall, the 20G11TD485AN0NNNNN can be regarded as a large-frame 480 VAC, 485 A-class industrial AC drive designed for approximately 400 HP Normal Duty motor applications, with the capability and flexibility needed for demanding industrial motor-control systems.