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Allen-Bradley 20G11TF415JN0NNNNN PowerFlex 755 AC Drive – Detailed Specifications, Product Introduction, Applications, Advantages and Recommended Models

The Allen-Bradley 20G11TF415JN0NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for large three-phase industrial motors. It is a 690 VAC, 415 A class drive in a large Frame 8 construction, with approximately 450 kW light-duty, 400 kW normal-duty, and 355 kW heavy-duty capability.

This model is intended for demanding motor-control applications such as large conveyors, mining equipment, pumps, fans, blowers, crushers, mills, mixers, and other heavy industrial machinery where accurate speed control and reliable high-power operation are important.

The J configuration is an important part of the catalog number. In this configuration, the common-mode capacitor jumper is installed. The model also uses an AC input with precharge and DC terminals, filtered configuration, embedded EtherNet/IP, forced-air cooling, and a blank/no-HIM arrangement.

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1. Basic Product Information

*Dimensions and weight are approximate engineering reference values for this high-power Frame 8 configuration. The actual installed or shipping dimensions can vary with the final configuration, accessories, mounting arrangement, and cabinet construction.

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2. Brand

The product brand is Allen-Bradley.

The 20G11TF415JN0NNNNN is positioned in the high-power section of the Allen-Bradley variable-frequency-drive portfolio.

It is not intended to compete with compact machine-level drives. Instead, it is designed for large motors and industrial equipment where the motor power can reach several hundred kilowatts.

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3. Product Series

The product belongs to the:

PowerFlex 755 Series

It is also part of the broader:

PowerFlex 750-Series

The PowerFlex 755 platform is designed for industrial applications requiring advanced motor control, flexible configuration, high power capability, and integration with automation systems.

The 20G11TF415JN0NNNNN represents a particularly large configuration of the PowerFlex 755 family.

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4. Product Type

The 20G11TF415JN0NNNNN is an:

Air-Cooled PowerFlex 755 AC Drive with Embedded EtherNet/IP

It is designed to regulate the speed, acceleration, deceleration, and operating characteristics of large three-phase AC motors.

Instead of connecting the motor directly to a fixed-frequency electrical supply, the drive provides controlled output power.

This makes it possible to adjust motor speed according to the actual process requirement.

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5. Model Number Breakdown

The complete catalog number is:

20G11TF415JN0NNNNN

The main sections can be understood as follows:

The 415 portion is especially important because it identifies the current class.

The F identifies the 690 VAC voltage class.

The J configuration indicates that the common-mode jumper is installed.

This is significant when comparing the model with similar A-version drives. The A and J configurations should not simply be treated as interchangeable because the common-mode configuration is different.

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6. Main Electrical Parameters

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7. Power Rating Explained

One of the most important points about the 20G11TF415JN0NNNNN is that it has different power ratings for different duty levels.

This distinction is important when selecting a drive.

A drive should not be selected only by looking at the motor’s nominal kW.

The actual motor current, torque requirement, acceleration profile, overload requirement, ambient conditions, and operating cycle should also be evaluated.

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8. Light-Duty Operation – 450 kW

The approximate light-duty rating is 450 kW.

This is the highest power rating associated with this configuration.

Light-duty operation is generally more suitable for applications where the motor does not continuously require substantial overload torque.

Large centrifugal fans and pumps are typical examples.

In these applications, the motor may operate for long periods under relatively predictable loading.

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9. Normal-Duty Operation – 400 kW

The approximate normal-duty rating is 400 kW.

This is arguably the most important rating for general industrial selection.

A 400 kW motor represents a substantial industrial power requirement.

Typical equipment at this level can include:

• Large conveyors
• Industrial pumps
• Large fans
• Blowers
• Material-handling equipment
• Process machinery
• Large mixers
• Industrial production equipment

The motor’s actual nameplate current should always be compared with the drive’s available current.

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10. Heavy-Duty Operation – 355 kW

The approximate heavy-duty rating is 355 kW.

Heavy-duty operation is relevant when the machine requires higher torque or experiences greater overload conditions.

Typical examples include:

• Crushers
• Heavy conveyors
• Mills
• Large mixers
• High-inertia machines
• Material-handling equipment
• Machinery with difficult starting conditions

The lower heavy-duty kW rating should not be interpreted as a reduction in the basic quality of the drive.

It reflects the greater thermal and electrical stress associated with heavy-duty motor operation.

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11. 690 VAC High-Voltage Operation

The 690 VAC rating is one of the defining features of this drive.

When motor power becomes very large, electrical current can also become substantial.

Using a higher motor voltage allows the same approximate power to be transferred at a lower current than would be required at a lower voltage.

This can be advantageous for large industrial electrical distribution systems.

For large motors, 690 VAC can therefore provide a practical balance between motor power and current requirements.

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12. 415 A Current Rating

The 415 A rating places this drive firmly in the high-power industrial category.

Current rating is especially important when the motor operates under demanding conditions.

These may include:

• High starting torque
• High inertia
• Frequent acceleration
• Heavy material loads
• Continuous high loading
• Rapid load changes
• Difficult mechanical starts

For this reason, motor selection should always be based on the motor nameplate current and the actual load profile.

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13. Air-Cooled Design

The 20G11TF415JN0NNNNN uses a forced-air cooling system.

High-power semiconductor devices generate significant heat.

The drive’s cooling system moves air through the power section to remove heat generated during operation.

The cooling arrangement makes cabinet ventilation particularly important.

The installation should provide adequate air intake and exhaust paths.

The cabinet should also be designed so that hot exhaust air does not simply circulate back into the drive’s intake.

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14. Frame 8 Construction

This model uses Frame 8 construction.

Frame size becomes increasingly important as drive power increases.

A Frame 8 drive is physically much larger than compact variable-frequency drives.

It requires appropriate planning for:

• Cabinet dimensions
• Structural support
• Power cables
• Motor cables
• Cooling airflow
• Maintenance access
• Lifting
• Floor loading
• Cable bending radius
• Service clearance

Large Frame 8 equipment should therefore be treated as major electrical equipment rather than as a small panel component.

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15. Dimensions and Weight

Because this is a large Frame 8 high-power drive, its physical size is substantial.

For preliminary engineering purposes, a practical reference range is approximately:

Height: ~2,180 mm class

Width: ~600 mm class

Depth: ~600–800 mm class

Weight: approximately 500–600 kg class

These figures should be considered preliminary.

The final mechanical drawing should be used when designing the cabinet or equipment room.

The actual weight is especially important for transportation, lifting, cabinet mounting, floor loading, and installation.

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16. Mechanical Specification Table

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17. Embedded EtherNet/IP

The 20G11TF415JN0NNNNN includes embedded EtherNet/IP.

This allows the drive to communicate directly with the plant automation system.

The drive can therefore exchange important operating information with a controller.

Typical information includes:

• Start command
• Stop command
• Speed reference
• Actual speed
• Motor current
• Drive status
• Alarm status
• Fault status
• Diagnostic information
• Operating data

This is particularly useful in automated production systems.

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18. Automation System Integration

Consider a large conveyor system with several motors.

The automation system may need to:

1. Start the first motor.
2. Confirm that the motor has reached operating speed.
3. Start the next conveyor.
4. Adjust the conveyor speed.
5. Monitor motor current.
6. Detect abnormal loading.
7. Stop the system if a fault occurs.
8. Record drive status.

With network-connected drives, these functions can be coordinated centrally.

This makes the PowerFlex 755 particularly useful in larger automation architectures.

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19. Filtered Configuration

The model uses a filtered configuration.

Filtering is important because variable-frequency drives generate high-frequency switching components during normal operation.

In a large industrial plant, electrical noise can potentially affect nearby instrumentation and electronic equipment if the installation is not properly designed.

A suitable combination of:

• Filtering
• Grounding
• Shielding
• Cable routing
• Motor cable selection
• Cabinet design

helps maintain a cleaner industrial electrical environment.

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20. Common-Mode Jumper Installed

The J portion of the catalog number indicates that the common-mode jumper is installed.

This is an important configuration characteristic.

The common-mode configuration affects the relationship between the drive’s electrical system and ground.

It can therefore influence system grounding and EMC considerations.

When replacing an existing drive, it is important to check the complete catalog number rather than selecting a model based only on voltage and current.

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21. AC Input With Precharge

The drive uses an AC input with precharge.

A high-power drive contains substantial DC-bus energy-storage components.

When the drive is energized, these capacitors must be charged.

The precharge circuit controls this process and helps limit the initial charging current.

This is particularly important in a drive of this size.

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22. DC Terminals

The model includes DC terminals.

This gives the PowerFlex 755 architecture additional flexibility for specialized system arrangements.

DC bus connections can be useful in applications involving shared DC bus architectures or other specialized power-system configurations.

Such arrangements should be engineered according to the complete electrical design.

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23. No Dynamic Braking

The 20G11TF415JN0NNNNN is configured with no internal dynamic braking.

This does not mean that the drive cannot decelerate a motor.

The drive can still provide controlled deceleration.

The important difference is that applications producing substantial regenerative energy may require a separate braking or regenerative solution.

This is particularly relevant for:

• High-inertia machines
• Downhill conveyors
• Lifting equipment
• Rapidly decelerated machinery
• Large rotating systems

For ordinary variable-torque applications, such as many pumps and fans, this may be less significant.

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24. Blank / No HIM

The model is configured as Blank / No HIM.

This arrangement is useful when the drive is installed inside a cabinet and controlled remotely.

The primary operator interface can instead be provided through:

• PLC
• HMI
• SCADA
• Remote control station
• Plant control system

This can be especially practical in centralized industrial automation installations.

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25. Product Introduction

The 20G11TF415JN0NNNNN should be regarded as a complete high-power motor-control platform rather than simply a large inverter.

Its purpose is to control the electrical power delivered to a large AC motor while providing speed and operating control.

The drive can control acceleration, operating speed, and deceleration while communicating drive information to the automation system.

This gives the machine designer much greater flexibility than a simple direct-on-line motor starter.

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26. Controlled Starting

Large motors can produce significant electrical and mechanical stress when started directly.

A variable-frequency drive can start the motor progressively.

The output frequency can be increased according to a programmed acceleration profile.

This allows the machine to move from standstill to operating speed in a controlled manner.

Potential benefits include reduced:

• Mechanical shock
• Belt stress
• Gearbox stress
• Coupling stress
• Shaft stress
• Starting current
• Vibration

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27. Controlled Speed

Once the motor reaches operating conditions, the drive can maintain the desired speed.

This is useful when the process does not always require maximum motor speed.

A conveyor may need different speeds at different production rates.

A pump may require different flow levels.

A fan may need to operate according to ventilation demand.

A mixer may require different speeds for different products.

Variable-frequency operation allows these changes without mechanically changing the transmission ratio.

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28. Torque Control

Large industrial machinery often requires good torque control as well as speed control.

For example, a conveyor carrying a heavy material load may require substantial torque during acceleration.

A crusher can experience sudden changes in mechanical load.

A mixer may experience different torque requirements depending on material viscosity.

The PowerFlex 755 platform is designed for advanced industrial motor-control applications where these operating characteristics matter.

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29. Large Conveyor Applications

Large conveyors are a particularly good application for this drive.

A large conveyor may have substantial:

• Belt mass
• Roller inertia
• Gearbox inertia
• Material load
• Mechanical resistance

Starting such a system abruptly can produce unnecessary stress.

The drive allows controlled acceleration and adjustable operating speed.

This can improve the mechanical behavior of the complete conveyor system.

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30. Mining Applications

Mining equipment often requires large motors.

Large mining conveyors, crushers, pumps, and fans can require hundreds of kilowatts of motor power.

The 690 VAC architecture and high current capacity make this type of drive appropriate for large mining installations when correctly engineered.

Mining installations also require special attention to:

• Dust
• Temperature
• Altitude
• Ventilation
• Regenerative operation
• Mechanical loading
• Motor cable length
• Grounding

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31. Large Pump Applications

Large industrial pumps are another important application.

Typical examples include:

• Water-treatment pumps
• Cooling-water pumps
• Industrial circulation pumps
• Process pumps
• Mining-water pumps
• Large pumping stations

Variable-speed control allows pump output to follow the process requirement.

This can also reduce unnecessary energy consumption when the system does not need full flow.

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32. Large Fan Applications

Large fans are well suited to variable-frequency control.

A fan does not always need to run at maximum speed.

The drive can adjust motor speed according to airflow requirements.

This can improve process control and potentially reduce energy consumption.

Large fan systems also benefit from controlled starting because fan assemblies can have substantial rotational inertia.

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33. Industrial Blower Applications

Industrial blowers can operate continuously and may require large motors.

The drive can adjust blower speed to suit the process.

Potential applications include:

• Manufacturing
• Cement
• Steel
• Chemical processing
• Mining
• Environmental systems
• Material handling

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34. Crusher Applications

Crushers are more demanding than many pump or fan applications.

Material loading can change quickly.

Starting torque can be substantial.

The heavy-duty rating is therefore an important consideration.

For crusher applications, the motor nameplate current and actual load profile should be compared against the drive’s heavy-duty capability before final selection.

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35. Mill Applications

Large industrial mills can require considerable motor power.

Variable-frequency control can provide controlled acceleration and operating-speed adjustment.

Depending on the mill design, different operating speeds may be useful for different material and production conditions.

The 20G11TF415JN0NNNNN can be considered for large mill applications when the motor current and duty requirements fall within its ratings.

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36. Mixer Applications

Large mixers can have significant inertia and changing torque requirements.

Variable-frequency control allows controlled acceleration from standstill.

The operating speed can then be adjusted according to the material or production process.

This makes the PowerFlex 755 suitable for large industrial mixing applications.

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37. Material Handling Applications

Material-handling equipment often requires coordinated motor operation.

Typical applications include:

• Conveyors
• Feeders
• Transfer systems
• Rollers
• Bulk-material systems
• Production-line transport

The network communication capability can also help coordinate several drives within the same production system.

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38. Application Suitability Table

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39. Main Product Advantages

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40. Advantage – High-Power Capability

The biggest advantage of the 20G11TF415JN0NNNNN is its ability to control very large motors.

A 400 kW normal-duty motor is already a major industrial power load.

Equipment in this range is commonly associated with large production systems, conveyors, pumping systems, mining equipment, fans, and heavy processing machinery.

The drive is designed for precisely this type of environment.

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41. Advantage – 690 VAC Architecture

The 690 VAC voltage class makes the model particularly suitable for large industrial motor systems.

At high power levels, reducing current becomes increasingly important.

The higher voltage allows large amounts of motor power to be handled at a lower current than an equivalent lower-voltage arrangement.

This can be advantageous for large electrical distribution systems.

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42. Advantage – Flexible Duty Selection

The LD, ND, and HD ratings provide flexibility.

The same drive can be considered for different applications depending on their duty requirements.

This makes the selection process more practical.

A pump may be evaluated against the light-duty rating.

A general industrial conveyor may be evaluated against the normal-duty rating.

A demanding crusher may need to be evaluated against the heavy-duty rating.

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43. Advantage – Industrial Ethernet

Embedded EtherNet/IP makes the drive suitable for modern industrial automation systems.

The drive can exchange commands, status, faults, and operating values with the plant controller.

This can reduce the need for separate control interfaces and make centralized monitoring easier.

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44. Advantage – Controlled Acceleration

Large machinery benefits greatly from controlled acceleration.

The motor can be brought gradually to operating speed instead of immediately applying full operating conditions.

This can reduce mechanical shock.

It can also make the entire machine behave more smoothly.

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45. Advantage – Reduced Mechanical Stress

Controlled acceleration and deceleration can help reduce stress on:

• Shafts
• Bearings
• Gearboxes
• Couplings
• Belts
• Chains
• Conveyor structures
• Fan assemblies
• Pump systems

This can contribute to more predictable machine operation and potentially longer component life.

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46. Advantage – Energy-Saving Potential

Variable-frequency drives can provide significant energy-saving opportunities in applications where the process demand changes.

This is particularly true for centrifugal pumps and fans.

Instead of operating continuously at maximum speed, the motor can operate closer to the speed required by the process.

The actual energy savings depend on the machine characteristics, operating schedule, load profile, and system design.

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47. Energy-Saving Application Comparison

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48. Five Recommended Models From the Same Series

For a 690 VAC high-power installation, the following PowerFlex 755 models are useful comparison choices.

These five models form a useful progression around the requested 415 A model.

The 265 A and 330 A models are suitable when the motor requirement is lower.

The 370 A model is a strong alternative around the 355 kW normal-duty level.

The 415 A model is particularly useful around the 400 kW normal-duty range.

The 460 A model provides additional capacity for applications approaching 450 kW normal duty.

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49. Same-Series Model Comparison

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50. Same-Series Mechanical Comparison

For the smaller and larger related models, the final mechanical dimensions and weight should be confirmed according to the exact configuration.

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51. Five Popular Models From the Same Brand

For comparison across different power levels and applications, these models provide a useful selection.

The first three models are compact drives intended for considerably smaller motors.

The PowerFlex 753 and PowerFlex 755 are more appropriate when advanced industrial control and larger motor capacity are required.

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52. Compact Drive Versus 20G11TF415JN0NNNNN

The physical difference between these product categories is substantial.

A compact PowerFlex 525 drive may weigh only a few kilograms.

The 20G11TF415JN0NNNNN is a high-power Frame 8 drive and can weigh several hundred kilograms.

The compact products are generally appropriate for machine-level motors.

The 20G11TF415JN0NNNNN is intended for large industrial motors and major production equipment.

This is why selecting a drive based purely on brand or series is not enough.

The application must be considered first.

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53. When to Choose the 370 A Model

The 20G11TF370JN0NNNNN is a useful alternative when the motor requirement is below the 415 A range.

Its approximate ratings are:

• 400 kW LD
• 355 kW ND
• 300 kW HD

For a motor around 355 kW normal duty, it may provide a more appropriately sized solution.

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54. When to Choose the 415 A Model

The 20G11TF415JN0NNNNN becomes particularly attractive when the motor approaches the 400 kW normal-duty range.

Its approximate ratings are:

• 450 kW LD
• 400 kW ND
• 355 kW HD

This gives it additional capacity compared with the 370 A model.

For large conveyors, pumps, fans, blowers, and process machinery, this can provide a useful operating margin when correctly selected.

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55. When to Choose the 460 A Model

The 20G11TF460JN0NNNNN provides another step upward.

Its approximate ratings are:

• 500 kW LD
• 450 kW ND
• 375 kW HD

This makes it a suitable comparison when the motor approaches the 450 kW normal-duty range.

It can also provide additional capacity for applications where future expansion is anticipated.

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56. Motor Selection Principle

A critical point in drive selection is:

The drive should be selected according to motor current and application duty, not simply motor kW.

Motor nameplate current can vary depending on:

• Motor efficiency
• Power factor
• Motor design
• Voltage
• Motor speed
• Operating conditions

Two motors with similar kW ratings may therefore require different drive selections.

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57. Cabinet Design

A Frame 8 drive requires adequate cabinet space.

The cabinet should accommodate:

• Drive body
• Power connections
• Motor connections
• Control wiring
• Network wiring
• Grounding
• Cooling airflow
• Protective devices
• Isolation equipment
• Maintenance access
• Cable bending radius

The high physical weight of the equipment also means the cabinet structure must be designed appropriately.

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58. Cooling Requirements

Cooling is one of the most important installation considerations.

The drive produces heat during operation.

The cabinet must remove this heat effectively.

The design should account for:

• Drive heat loss
• Other heat-producing equipment
• Ambient temperature
• Airflow direction
• Cooling fan capacity
• Exhaust path
• Air filter condition
• Cabinet enclosure

If the drive is installed in an excessively hot cabinet, thermal performance and service life can be affected.

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59. Electrical Installation

The electrical installation should be designed around the complete system.

Important factors include:

• Incoming supply voltage
• Motor voltage
• Motor current
• Short-circuit protection
• Grounding
• Motor cable size
• Cable length
• EMC
• Input isolation
• Control wiring
• Network wiring
• Braking requirements

Large motor installations should be engineered carefully because electrical faults at this power level can be extremely serious.

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60. Maintenance Considerations

Routine maintenance should include inspection of:

• Cooling fans
• Air filters
• Airflow
• Power connections
• Grounding
• Motor cables
• Control wiring
• Network connections
• Cabinet temperature
• Alarm history
• Fault history

Dust accumulation should be controlled because restricted airflow can increase internal temperature.

The cooling system is therefore one of the most important areas for preventive maintenance.

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61. Typical Industries

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62. Recommended Application by Drive Model

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63. Key Technical Strengths

The 20G11TF415JN0NNNNN combines several features that make it particularly useful for high-power industrial applications.

Its 690 VAC voltage class makes it suitable for large motor systems.

Its 415 A current class provides substantial motor-control capacity.

Its 450 kW LD, 400 kW ND, and 355 kW HD ratings allow the same basic drive platform to be considered for different operating duties.

Its Frame 8 construction provides a high-power electrical architecture suitable for large industrial equipment.

Its embedded EtherNet/IP capability makes it easier to integrate into a modern control system.

Its forced-air cooling supports continuous operation at high power when the installation is properly designed.

Its filtered configuration and installed common-mode jumper provide a defined electrical configuration that should be matched to the intended installation.

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64. Complete Final Specification

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65. Overall Product Evaluation

The Allen-Bradley 20G11TF415JN0NNNNN is a high-power industrial variable-frequency drive designed for large three-phase AC motors.

Its combination of 690 VAC operation, 415 A current capacity, 450 kW light-duty capability, 400 kW normal-duty capability, 355 kW heavy-duty capability, Frame 8 construction, forced-air cooling, embedded EtherNet/IP, filtered configuration, installed common-mode jumper, AC input with precharge, and DC terminals makes it a strong choice for large industrial motor systems.

The model is particularly well suited to applications where the motor needs controlled acceleration, variable-speed operation, centralized monitoring, and integration into an automated production system.

For a large conveyor, the drive can provide controlled starting and speed adjustment.

For a large pump, it can provide variable-speed flow control.

For a large fan or blower, it can regulate airflow and potentially reduce energy consumption during periods of reduced demand.

For crushers and mills, the high-current capability and heavy-duty rating can be important, although the actual motor current and mechanical duty must be checked carefully.

The 400 kW normal-duty rating is probably the most useful reference point for many general industrial applications. However, the 355 kW heavy-duty rating becomes more important when the machine requires high torque or significant overload capability.

The physical size should not be underestimated. A Frame 8 drive at this power level is major electrical equipment, with an approximate weight in the 500–600 kg class and substantial cabinet and installation requirements.

Proper ventilation, structural support, power-cable routing, grounding, maintenance clearance, and lifting arrangements should all be considered during system design.

From a model-selection perspective, the 20G11TF370JN0NNNNN is a useful lower-capacity alternative, while the 20G11TF460JN0NNNNN provides additional capacity above the 415 A model.

For a 690 VAC system with a motor around 400 kW under normal-duty conditions, the 20G11TF415JN0NNNNN is a particularly suitable member of the PowerFlex 755 family to evaluate.

Overall, this model is best characterized as a large, high-voltage, high-current industrial AC drive for demanding motor-control applications, combining substantial power capability with variable-speed control and industrial automation integration.