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Allen-Bradley 20G11TF265AN0NNNNN — Detailed Product Specifications, Introduction, Applications, Advantages and Related Models

The 20G11TF265AN0NNNNN is a high-power PowerFlex 755 AC variable frequency drive designed for large industrial three-phase motors. It belongs to the 690 VAC class and is intended for applications requiring high motor power, controlled acceleration, variable-speed operation and integration into an industrial automation system.

The model is rated at approximately 265 A in its relevant 690 V configuration and is associated with a high-power Frame 8 architecture. Depending on the duty category and application conditions, the corresponding motor power range is approximately 315 kW Heavy Duty, 250 kW Normal Duty, or 200 kW-class Light Duty, making it suitable for large pumps, fans, conveyors, compressors, mills, mixers and other heavy industrial machinery.

The AN0NNNNN version represents the earlier configuration of this model. The corresponding newer configuration uses the JN0NNNNN suffix, with the J configuration associated with the CM jumper installed.

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1. Basic Product Information

*The dimensions and weight are engineering reference values for the high-power drive arrangement. Actual dimensions and weight can vary according to the specific installation arrangement, power structure, cabinet configuration and accessories.

The 20G11TF265AN0NNNNN is therefore a substantially larger product than compact variable frequency drives intended for small motors.

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2. Brand

Allen-Bradley

The 20G11TF265AN0NNNNN belongs to the Allen-Bradley industrial drive product range.

It is designed for industrial motor-control systems where the drive is expected to operate as an integrated part of a larger electrical and automation installation.

The product is particularly appropriate for large motors and machinery where precise speed regulation, controlled starting, network communication and high-power operation are important.

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3. Product Series

PowerFlex 755

The product belongs to the PowerFlex 755 series.

The PowerFlex 755 platform is intended for industrial applications ranging from medium-sized machines to very large motor systems.

Compared with compact drive products, the PowerFlex 755 platform provides substantially greater current and power capability and is intended for more demanding industrial installations.

The 20G11TF265AN0NNNNN is positioned within the high-power 690 VAC portion of the PowerFlex 755 range.

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4. Model Number

20G11TF265AN0NNNNN

The catalog number contains several important configuration identifiers.

The most important selection information is:

PowerFlex 755 + 690 VAC + 265 A + high-power Frame 8 architecture.

This makes the drive appropriate for large industrial motors rather than small machine motors.

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5. Main Electrical Parameters

The 690 VAC rating is a major characteristic of this model.

It allows the drive to be used in high-voltage industrial motor systems where a 400 V or 480 V class drive would not be appropriate.

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6. Duty Rating Explanation

The drive’s power capability needs to be considered according to the application duty.

The difference between these ratings is important.

A machine with a relatively stable load can often be evaluated using the Normal Duty rating.

A machine with substantial overload requirements, high starting torque or repeated acceleration may need to be evaluated using the Heavy Duty rating.

Therefore, the maximum power value should not automatically be treated as the correct rating for every motor.

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7. Light Duty Applications

The Light Duty capacity is approximately 315 kW class.

This rating is particularly useful for applications where the load characteristics are relatively favorable.

Typical examples include large centrifugal pumps, large fans and certain variable-torque machines.

The actual motor current should always be checked before selecting the drive.

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8. Normal Duty Applications

The Normal Duty rating is approximately 250 kW.

This is a useful reference for general industrial machinery.

Examples include:

• Large conveyors.
• Industrial pumps.
• Fans.
• Blowers.
• Mixers.
• Process machinery.
• Material-handling systems.

For these applications, motor nameplate current and the required overload profile should be compared with the applicable drive rating.

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9. Heavy Duty Applications

The Heavy Duty capability is approximately 200 kW.

Heavy Duty applications typically involve more demanding mechanical loads.

Examples include:

• Crushers.
• Heavy conveyors.
• Mills.
• Large mixers.
• High-torque material-handling machinery.
• Machines with significant starting torque.

In these applications, it is important to select the drive based on the Heavy Duty rating rather than using the higher Light Duty value.

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10. Product Introduction

The 20G11TF265AN0NNNNN is a high-power variable frequency drive designed to control large three-phase AC motors.

The drive converts incoming electrical energy into a controlled variable-frequency output.

By changing the output frequency and voltage, the drive can regulate motor speed.

This provides much more control than a traditional fixed-speed motor starter.

For large industrial machines, controlled motor acceleration can be particularly valuable.

Instead of applying full electrical power directly to the motor at startup, the drive can increase motor speed according to a programmed acceleration profile.

This can reduce mechanical shock and improve the overall operating characteristics of the machine.

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11. Basic Operating Principle

The drive operates through several major stages.

AC Input

The incoming three-phase AC power enters the drive’s input stage.

The precharge function helps control the initial charging process of the DC bus.

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DC Bus

The input energy is converted into a DC bus.

The DC bus acts as an intermediate energy stage between the input and output power sections.

The high-power architecture provides the required capacity for large industrial motors.

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Inverter Section

The inverter converts DC bus power into a controlled three-phase AC output.

The output frequency and voltage can be varied according to the motor-control requirements.

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Motor

The controlled AC output is supplied to the motor.

The motor speed can then be adjusted according to the frequency reference.

This allows the drive to control motor speed rather than simply switching the motor between ON and OFF states.

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12. Main Product Functions

Variable-Speed Control

The primary function is to provide variable-speed control for large AC motors.

The motor can operate at different speeds according to the production requirement.

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Controlled Acceleration

Large motors and mechanical systems often have significant inertia.

Controlled acceleration helps reduce sudden mechanical stress.

This can be especially useful for:

• Conveyors.
• Large fans.
• Pumps.
• Mixers.
• Mills.
• Process machinery.

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Controlled Deceleration

The drive can also control how quickly the motor slows down.

This is useful where an abrupt stop could create excessive mechanical stress.

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Speed Reference Control

The motor speed can be controlled through a programmed reference.

The reference can be associated with a PLC, operator station or process-control system.

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Industrial Network Communication

The embedded EtherNet/IP capability allows the drive to communicate with an industrial control system.

This provides access to operating status, commands, speed references, diagnostics and other drive information.

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13. Main Product Advantages

13.1 690 VAC High-Voltage Class

One of the major advantages of this model is its 690 VAC class.

This allows it to be used in high-voltage industrial motor systems.

For large motors, using a higher motor voltage can help reduce current compared with an equivalent motor power at a lower voltage.

This can be beneficial for large industrial installations.

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13.2 265 A Current Capacity

The approximately 265 A Normal Duty current class provides substantial capacity for large industrial motors.

The drive is therefore suited to motors far beyond the range of compact machine drives.

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13.3 High-Power Capability

The drive can operate in the approximately 315 kW Light Duty class.

This places it firmly in the high-power industrial category.

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13.4 PowerFlex 755 Architecture

The PowerFlex 755 platform provides a standardized architecture for large industrial motor control.

This can simplify system design when multiple motors with different power ratings are used in the same facility.

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13.5 Embedded EtherNet/IP

Industrial network communication is a major advantage.

The drive can become part of a larger automated system.

This allows operators and control systems to monitor the drive rather than treating it as an isolated motor controller.

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13.6 Air-Cooled Design

The forced-air cooling system provides a practical cooling solution for high-power applications.

Thermal management is particularly important because large power electronics generate significant heat.

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14. Mechanical Specifications

The dimensions and weight should be treated as approximate engineering values.

For actual cabinet construction, foundation design, lifting calculations or transportation planning, the configuration-specific mechanical drawing should be used.

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15. Why Dimensions and Weight Are Important

A high-power 690 VAC drive is a significant piece of electrical equipment.

The installation must provide adequate physical support.

The cabinet or mounting structure must be able to support the drive’s weight without excessive vibration or mechanical deformation.

Adequate space must also be provided for:

• Power cables.
• Control wiring.
• Network connections.
• Cooling airflow.
• Maintenance.
• Inspection.
• Component replacement.

The several-hundred-kilogram weight means that mechanical handling should be planned before installation.

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16. Cooling and Thermal Management

The 20G11TF265AN0NNNNN uses forced-air cooling.

Cooling is critical to the reliability of high-power semiconductor equipment.

The installation should provide adequate airflow around the drive.

Cabinet ventilation should be designed so that hot air does not accumulate around the drive.

Important considerations include:

• Cooling fan operation.
• Cabinet airflow.
• Air filters.
• Ambient temperature.
• Dust.
• Humidity.
• Ventilation openings.
• Heat dissipation.

In dusty environments, filters and cooling passages should be inspected regularly.

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17. Industrial Communication

The drive includes embedded EtherNet/IP.

This allows the drive to be incorporated into an industrial automation network.

A typical system can be represented as:

PLC → Industrial Ethernet Network → PowerFlex 755 → AC Motor

The automation system can exchange information with the drive.

Typical data may include:

• Start command.
• Stop command.
• Speed reference.
• Actual speed.
• Output current.
• Drive status.
• Fault information.
• Alarm information.
• Operating condition.

This is particularly useful in large production facilities where multiple large motors need centralized monitoring.

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18. Typical Applications

Large Conveyor Systems

Large conveyors can have considerable inertia.

When a conveyor is loaded, the motor may need to accelerate a large mass.

A variable frequency drive allows the acceleration process to be controlled.

This can reduce mechanical shock to the belt, gearbox, coupling and motor shaft.

The drive can also allow conveyor speed to be adjusted according to material flow.

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Large Pumps

Large industrial pumps are another important application.

Variable-speed operation can allow pump output to follow the process requirement.

Potential applications include:

• Water treatment.
• Industrial cooling.
• Process circulation.
• Water transfer.
• Industrial pumping stations.

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Large Fans and Blowers

Fans and blowers can benefit from variable-speed control.

The motor speed can be adjusted according to airflow demand.

This can be particularly useful in industrial ventilation and process exhaust systems.

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Crushers

Crushers can experience high mechanical loads and significant torque requirements.

For crusher applications, Heavy Duty selection should receive particular attention.

The motor’s actual current and overload requirements should be compared with the applicable Heavy Duty rating.

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Mills

Large mills can require substantial continuous torque.

The drive can provide controlled acceleration and variable-speed operation.

This can improve the ability of the production process to operate at different speeds.

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Mixers

Large mixers can require high starting torque.

The drive can provide a controlled acceleration profile and adjustable operating speed.

This can be useful when different production stages require different mixing speeds.

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Material Handling

The drive can be considered for:

• Feeders.
• Conveyors.
• Elevators.
• Transfer systems.
• Large handling machinery.

Controlled speed can improve coordination between different sections of a material-handling system.

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19. Application Advantages

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20. Five Recommended Models from the Same Series

The following models are useful for comparison because they belong to the same PowerFlex 755 high-power family.

These models provide a useful progression when the motor power is close to the upper or lower range of the 265 A model.

The 20G11TF215AN0NNNNN can be considered for lower-power applications.

The 20G11TF330AN0NNNNN, 20G11TF370AN0NNNNN and 20G11TF415AN0NNNNN provide progressively higher current and power capability.

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21. Same-Series Comparison

This comparison illustrates the scalable nature of the PowerFlex 755 high-power 690 VAC family.

When selecting between these models, motor current and duty cycle should be evaluated before horsepower alone.

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22. Five Related 690 VAC Models

Another useful way to compare the product is by looking at adjacent high-power models.

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23. Mechanical Comparison of Related Models

*High-power configurations can have different physical arrangements. These values are therefore intended for preliminary comparison only.

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24. Five Popular Models from the Same Brand

The following models represent different product families and capacity ranges.

These models cover a very wide range of industrial motor sizes.

The PowerFlex 525 and PowerFlex 523 examples are aimed at smaller machines.

The PowerFlex 753 is more appropriate for larger industrial applications.

The 20G11TF265AN0NNNNN is designed for a substantially higher power class.

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25. Compact Drive vs. 20G11TF265AN0NNNNN

This is an important distinction when selecting the correct drive.

The basic purpose of both products is motor speed control, but the electrical and mechanical scale is completely different.

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26. Advantages in Large Pump Applications

The 690 VAC architecture is particularly useful for high-power pump motors.

When motor power becomes very large, increasing motor voltage can help manage current levels.

The drive can then provide variable-speed control for the pump.

For suitable centrifugal pump systems, reducing speed can also reduce energy consumption when the process does not require maximum flow.

The actual energy benefit depends on the pump characteristics and process operating profile.

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27. Advantages in Large Fan Applications

Large fans can consume substantial amounts of power.

If the required airflow varies, running the motor continuously at maximum speed may not be necessary.

Variable-frequency control allows fan speed to follow the actual process demand.

This can provide better process control and potentially reduce energy consumption.

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28. Advantages in Conveyor Applications

Conveyors benefit from controlled acceleration.

A loaded conveyor can have a very large mechanical mass.

Sudden acceleration can place stress on:

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

The drive can provide a controlled acceleration profile to reduce these stresses.

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29. Advantages in Heavy Industrial Machinery

The high-power architecture makes the drive appropriate for machines where motor power is measured in hundreds of kilowatts.

This includes:

• Mining machinery.
• Material-handling systems.
• Process machinery.
• Large pumps.
• Large fans.
• Crushers.
• Mills.
• Industrial mixers.

For these applications, the drive’s high current and high-voltage capabilities are important advantages.

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30. Energy Efficiency Considerations

Variable-speed drives can provide substantial energy benefits in applications where motor speed changes with process demand.

This is especially relevant for centrifugal pumps and fans.

When speed is reduced, the motor can operate closer to the actual process requirement.

For constant-torque machinery, the energy-saving relationship is different.

Therefore, an energy analysis should consider:

• Operating hours.
• Motor speed.
• Load profile.
• Motor efficiency.
• Process demand.
• Number of operating cycles.

The drive itself should not be considered an automatic energy-saving device; the greatest benefits occur when the application genuinely benefits from variable-speed operation.

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31. Maintenance Considerations

Cooling Fans

Cooling fans should be inspected as part of routine maintenance.

A degraded fan can reduce cooling performance.

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Air Filters

Where filters are used, they should be inspected and cleaned or replaced as appropriate.

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Power Connections

High-current connections should be inspected according to the maintenance procedure.

Loose connections can create excessive heat.

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Control Connections

Control and network wiring should be checked for damage, vibration and connection quality.

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Fault Records

Drive faults and alarms should be reviewed.

Repeated faults may indicate a developing motor, mechanical or electrical problem.

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32. Installation Environment

The following conditions should be considered before installation.

The drive should be installed in an environment suitable for high-power industrial electronics.

In dusty areas, cooling maintenance becomes especially important.

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33. Important Selection Factors

Before selecting the 20G11TF265AN0NNNNN, engineers should check the following.

Motor Voltage

Confirm that the motor is suitable for the 690 VAC drive class.

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Motor Current

The motor nameplate current should be compared with the drive’s applicable current rating.

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Motor Power

Motor kW should be compared with the applicable Light Duty, Normal Duty or Heavy Duty rating.

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Duty Cycle

Determine whether the motor operates under Light, Normal or Heavy Duty conditions.

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Starting Torque

Machines requiring high starting torque should be evaluated using the appropriate Heavy Duty rating.

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Acceleration Time

Large mechanical loads may require long acceleration ramps.

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Mechanical Inertia

High-inertia loads should be considered when determining acceleration and deceleration requirements.

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Ambient Conditions

Temperature, dust, humidity and altitude can affect the installation.

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34. Recommended Model by Application

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35. 215 A vs. 265 A vs. 330 A

The following comparison helps illustrate where the target model sits within the 690 VAC family.

The 265 A model occupies an important middle position.

It provides more capacity than the 215 A model while remaining below the 330 A model.

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36. Key Technical Advantages at a Glance

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37. Final Technical Specification Table

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38. Overall Product Evaluation

The 20G11TF265AN0NNNNN is a high-power industrial variable frequency drive designed for large three-phase AC motors operating in the 690 VAC class.

Its approximately 265 A current class and approximately 250 kW Normal Duty capability place it well above compact industrial drives.

The product is particularly suitable for large pumps, fans, blowers, conveyors, material-handling equipment, mixers and process machinery.

For demanding mechanical loads, the approximately 200 kW Heavy Duty rating should be used as the main sizing reference.

One of the strongest features of this model is its combination of high-voltage operation and high-power capability.

The 690 VAC architecture is particularly useful for large motor systems because the higher motor voltage can help keep current at a manageable level for a given motor power.

The embedded EtherNet/IP capability also makes the drive suitable for networked industrial automation.

The forced-air cooling system provides the necessary thermal-management approach for high-power operation, while the open construction allows integration into an appropriately designed industrial cabinet.

The physical size and several-hundred-kilogram weight mean that installation requires significantly more planning than a compact drive.

Cabinet structure, ventilation, cable routing, lifting, transportation and maintenance access should all be considered during system design.

Among related 690 VAC PowerFlex 755 models, the 20G11TF215AN0NNNNN is a lower-capacity alternative, while the 20G11TF330AN0NNNNN, 20G11TF370AN0NNNNN and 20G11TF415AN0NNNNN provide progressively higher current and power capability.

Overall, the 20G11TF265AN0NNNNN is best positioned as a high-power 690 VAC PowerFlex 755 drive for large industrial motor-control systems, particularly where variable speed, controlled acceleration, high motor power and industrial network integration are required.