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Allen-Bradley 20G14TF265AN0NNNNN — PowerFlex 755 High-Power AC Drive

1. Product Overview

The Allen-Bradley 20G14TF265AN0NNNNN is a high-power PowerFlex 755 AC Drive designed for large three-phase industrial motors. It belongs to the PowerFlex 750 Series and is built in Frame 8 with forced-air cooling.

This model is part of the 690 VAC class of PowerFlex 755 drives. It is intended for applications where a conventional 400 VAC or 480 VAC drive is not appropriate and where the motor and plant electrical system operate at a higher voltage level.

The model is particularly suitable for large pumps, fans, blowers, conveyors, mixers, process machinery and other industrial equipment requiring adjustable-speed control.

The 20G14TF265AN0NNNNN is an air-cooled, open-type drive with an EMC filter and no dynamic braking. The “AN” configuration is associated with the AC-input version of this high-voltage PowerFlex 755 configuration.

For large industrial installations, this model offers a useful combination of high-voltage operation, substantial motor capacity, adjustable speed and industrial control capability.

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2. Brand and Product Series

The PowerFlex 755 series is intended for demanding industrial motor applications where speed control, torque control, process integration and high-power operation are important.

The TF configuration is associated with the 690 VAC class of the PowerFlex 755 platform, making it particularly useful for high-voltage industrial motor systems.

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3. Detailed Technical Parameters

The exact physical dimensions and final weight should be treated as configuration-dependent for engineering purposes. A Frame 8 PowerFlex 755 installation should be designed around the final mechanical drawing rather than an estimated generic enclosure size.

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4. Electrical Characteristics

The 20G14TF265AN0NNNNN is designed for a 690 VAC three-phase electrical system.

This is one of the most important differences between the TF family and the lower-voltage PowerFlex 755 configurations.

The 690 VAC class is particularly common in large industrial installations where higher motor voltage is preferred for reducing current at a given power level.

For a large motor, increasing the voltage can reduce the current required for the same approximate power output. This can influence conductor sizing, distribution equipment and overall plant electrical architecture.

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5. Light Duty, Normal Duty and Heavy Duty

The drive can be evaluated under different duty classifications depending on the motor load.

The distinction between duty classifications is important because the available overload capability changes with the selected duty mode.

A large centrifugal pump or fan generally has different requirements from a heavily loaded conveyor, mixer or high-inertia machine.

For that reason, the drive should be selected according to the actual motor current and load profile instead of simply matching the motor’s kW rating.

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6. 690 VAC High-Voltage Design

The 690 VAC rating is one of the main advantages of the 20G14TF265AN0NNNNN.

Large industrial motors are often operated at higher voltages to keep operating current at a practical level.

For example, a large 250 kW-class motor operating at 690 VAC can generally be supplied with less current than an equivalent motor operating at a substantially lower voltage.

This can provide advantages in large plant distribution systems.

Potential benefits include:

• Reduced motor current.
• More practical large-motor cable sizing.
• Reduced current through upstream distribution equipment.
• Better suitability for large industrial motors.
• Compatibility with 690 VAC plant systems.
• Reduced electrical losses in some distribution arrangements.

The actual electrical design still depends on motor efficiency, power factor, cable length, transformer impedance and other system parameters.

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7. AC Input Configuration

The 20G14TF265AN0NNNNN is an AC-input configuration.

The drive receives three-phase AC power and converts the incoming electrical energy into a controlled variable-frequency output suitable for an AC motor.

The basic power conversion process can be summarized as:

AC input → rectification → DC bus → inverter → variable-frequency AC output → motor

The inverter section controls the output voltage and frequency supplied to the motor.

This allows the motor speed to be adjusted according to the requirements of the industrial process.

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8. Product Construction

The 20G14TF265AN0NNNNN uses a Frame 8 high-power construction.

Frame 8 is intended for considerably larger equipment than compact industrial drives.

This means the installation should be planned around:

• Cabinet dimensions.
• Mechanical support.
• Power-cable routing.
• Cooling airflow.
• Maintenance access.
• Grounding.
• Service clearance.
• Lifting and handling.
• Heat dissipation.
• Motor cable routing.

A large Frame 8 drive should not simply be treated as a larger version of a small wall-mounted inverter.

It is normally part of a larger industrial electrical installation.

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9. Cooling System

The drive uses forced-air cooling.

At this power level, heat removal is an important part of reliable operation.

The cooling system needs adequate air circulation around the drive, while hot exhaust air should not be allowed to return directly to the intake.

The installation should take into account:

A high-power drive can operate correctly electrically and still experience problems if the cabinet cooling system is inadequate.

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10. EMC Filtering

The 20G14TF265AN0NNNNN is configured with an EMC filter.

EMC filtering helps control conducted electrical noise associated with high-power variable-frequency drive operation.

However, EMC performance depends on the complete installation.

Important factors include:

• Motor cable construction.
• Cable length.
• Grounding.
• Shielding.
• Cabinet arrangement.
• Control-cable routing.
• Separation of power and signal wiring.
• Motor grounding.
• Proper termination.

For this reason, the EMC filter should be considered part of the overall installation design rather than as a stand-alone solution.

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11. Dynamic Braking

This model is specified with no dynamic braking.

This does not prevent the drive from controlling deceleration.

It means that an application requiring substantial regenerative braking energy needs to be evaluated separately.

For machines with high inertia or frequent rapid stops, braking requirements should be analyzed before selecting the final drive configuration.

Applications that may require special braking consideration include:

• High-inertia fans.
• Large centrifuges.
• Rapidly stopping conveyors.
• Hoisting equipment.
• High-speed rotating machinery.
• Machines with frequent acceleration and deceleration cycles.

If a process does not require substantial regenerative braking, the absence of an internal dynamic-braking configuration may be entirely appropriate.

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12. Product Introduction

The Allen-Bradley 20G14TF265AN0NNNNN is designed to provide adjustable-speed control for large three-phase AC motors in industrial environments.

Instead of operating the motor at a fixed speed determined only by the incoming electrical frequency, the drive controls motor frequency and voltage so that the motor can operate at different speeds.

This gives the machine operator or automation system much greater control over the process.

For example, a large pump may need high flow during one part of the process and reduced flow during another.

A fan may need full speed during peak production but significantly lower speed during normal operation.

A conveyor may need a controlled start to prevent material movement and mechanical shock.

A mixer may require several different speeds during a production cycle.

The drive provides the electrical interface between the plant power system and the motor while allowing the motor’s operating characteristics to be coordinated with the industrial process.

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13. Main Product Advantages

13.1 690 VAC Operation

The 690 VAC class is one of the strongest reasons to select this model.

It is designed for high-voltage industrial motor systems and is appropriate for applications where large motors are operated from a 690 VAC supply.

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13.2 Large Motor Capacity

The drive is intended for approximately 250 kW-class applications under Light Duty and Normal Duty conditions, with approximately 200 kW Heavy Duty capability.

This places the model firmly in the large industrial motor category.

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13.3 High Current Capability

The approximately 265 A class current rating allows the drive to control substantially larger motors than small and medium PowerFlex models.

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13.4 Variable-Speed Control

The motor can operate at different speeds according to process requirements.

This is particularly valuable for pumps, fans and other variable-torque machinery.

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13.5 Controlled Acceleration

A large motor can generate considerable mechanical stress when started abruptly.

The drive allows acceleration to be controlled.

This can reduce mechanical shock on:

• Shafts.
• Couplings.
• Gearboxes.
• Belts.
• Bearings.
• Pump assemblies.
• Conveyor systems.

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13.6 Controlled Deceleration

Controlled deceleration can provide a smoother stopping process.

This is useful where uncontrolled stopping could create excessive mechanical stress or process instability.

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13.7 Industrial-Grade Frame 8 Construction

The Frame 8 design is intended for large industrial installations.

It provides a suitable platform for high-power applications where compact drive construction is no longer practical.

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13.8 EMC Filter

The integrated EMC filter configuration is useful for industrial installations where conducted noise and electromagnetic compatibility need to be considered.

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13.9 PowerFlex 755 Platform

The PowerFlex 755 platform provides a broad range of motor-control functions and can be integrated into larger industrial automation systems.

This makes the drive suitable for applications where motor control is part of a larger process-control architecture.

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14. Product Applications

Large Industrial Pumps

Large pumps are one of the most natural applications for a 690 VAC high-power drive.

Typical applications include:

• Water circulation.
• Industrial water systems.
• Cooling-water systems.
• Process pumping.
• Wastewater pumping.
• Raw-water systems.
• Large transfer pumps.

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

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15. Large Fans

Large fans frequently operate for long periods and can have substantial energy consumption.

A variable-speed drive allows the fan to operate according to the required airflow rather than continuously running at full speed.

Typical applications include:

• Industrial ventilation.
• Furnace ventilation.
• Process exhaust.
• Cooling systems.
• Air-handling systems.
• Combustion-air systems.
• Mining ventilation.

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16. Blower Applications

Large blowers may require substantial motor power and continuous operation.

The drive can provide controlled acceleration and adjustable operating speed.

Potential applications include:

• Wastewater aeration.
• Industrial air supply.
• Process gas movement.
• Pneumatic systems.
• Industrial ventilation.

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17. Conveyor Systems

Large conveyors can have high inertia and significant starting loads.

The drive can gradually increase motor speed rather than applying full operating conditions immediately.

This can reduce stress on:

• Conveyor belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Drive pulleys.

The drive can also provide controlled stopping when the process requires it.

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18. Mixers and Agitators

Industrial mixers and agitators can require substantial torque, particularly during startup.

The PowerFlex 755 platform can be used to control motor speed and provide controlled acceleration.

Typical applications include:

• Chemical processing.
• Water treatment.
• Industrial production.
• Material mixing.
• Slurry processing.
• Process tanks.

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19. Process Machinery

The 20G14TF265AN0NNNNN can be used in industrial process machinery where motor speed needs to be adjusted according to the production cycle.

Examples include:

• Large production machines.
• Process pumps.
• Industrial fans.
• Material-handling equipment.
• Process blowers.
• Large rotating machinery.

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20. Typical Industrial Sectors

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21. Motor Selection

Motor selection should be based on the actual motor nameplate data.

The following information should be checked before selecting the drive:

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

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22. Suitable Load Types

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23. Installation Requirements

A 690 VAC Frame 8 drive requires careful electrical and mechanical planning.

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24. Cabinet Design

The 20G14TF265AN0NNNNN is not a small wall-mounted drive.

It is a large industrial power-conversion unit that normally requires a suitable cabinet or equipment enclosure.

Cabinet design should consider:

• Drive footprint.
• Power-cable routing.
• Motor-cable routing.
• Grounding.
• Airflow.
• Heat dissipation.
• Service access.
• Control wiring.
• Communication wiring.
• Clearance around power terminals.
• Maintenance access.
• Fan replacement.
• Electrical isolation.

Because the drive is a high-power 690 VAC device, cabinet design should also account for the applicable electrical safety requirements of the installation.

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25. Dimensions and Weight

The exact mechanical dimensions and final weight should be treated as configuration-dependent.

For a Frame 8 PowerFlex 755 installation, the final mechanical drawing should be used before manufacturing the cabinet.

For this model, it is better to specify “Configuration-dependent kg” for the final weight rather than use an unverified number.

The actual weight can depend on the final drive arrangement and associated hardware.

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26. Five Recommended Same-Series or Closely Related Models

The following models are closely related to the 20G14TF265AN0NNNNN and are useful when selecting a different motor-current or power range within the 690 VAC PowerFlex 755 family.

These models provide a practical progression for 690 VAC high-power motor applications.

The 20G14TF265AN0NNNNN is appropriate when the motor is in the approximately 250 kW class.

The larger TF330, TF370, TF415 and TF460 models provide progressively greater motor capacity.

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27. Same-Series Comparison

This group is especially useful when several different motor sizes are used within the same production facility.

Keeping the same PowerFlex 755 family can simplify engineering standards, control philosophy, spare-parts planning and maintenance procedures.

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28. Five Popular Models from the Same Brand

The following are useful additional PowerFlex models for comparison across different voltage and current ranges.

These models are not all direct replacements for the 20G14TF265AN0NNNNN.

They represent different electrical configurations and power levels within the same broad PowerFlex platform.

The correct alternative depends on the motor voltage, motor current, input arrangement, duty cycle and application requirements.

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29. Same-Brand Comparison Table

The 20G14TF265AN0NNNNN occupies a different position within this comparison because its 690 VAC class makes it particularly appropriate for high-voltage motor systems.

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30. Why Choose the 20G14TF265AN0NNNNN?

The model is particularly attractive when the application has the following characteristics:

• A 690 VAC three-phase electrical system.
• A large AC motor.
• Approximately 250 kW-class motor requirements.
• Need for adjustable speed.
• Need for controlled acceleration.
• Need for controlled deceleration.
• Industrial process-control requirements.
• High-power pump or fan operation.
• Large conveyor systems.
• Large blower applications.
• High-power process machinery.

The 690 VAC architecture is especially useful when the plant already uses 690 VAC motors and distribution equipment.

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31. Energy and Process Benefits

The drive can provide process benefits beyond simple motor-speed control.

For centrifugal pumps and fans, reducing motor speed can significantly reduce the power required by the mechanical system under appropriate operating conditions.

Instead of running a motor continuously at full speed and regulating the process using mechanical restrictions, the drive can adjust motor speed more directly.

This can provide:

• Better process control.
• Reduced unnecessary motor operation.
• Lower mechanical stress.
• Potential energy savings.
• Smoother operation.
• Reduced starting shock.

The actual energy savings depend heavily on the process and should be calculated from the real operating profile.

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32. Mechanical Advantages

Large motors can create significant mechanical stress during direct starting.

A controlled acceleration profile can reduce sudden torque application.

This can help protect:

• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Belts.
• Pump components.
• Conveyor systems.
• Fan assemblies.

For large production machinery, smoother acceleration can also improve the overall production process.

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33. Maintenance Recommendations

A high-power Frame 8 drive should be included in a planned maintenance program.

Cooling System

Inspect cooling fans and airflow passages periodically.

Dust and contamination should be controlled because restricted airflow can raise internal temperatures.

Electrical Connections

High-current connections should be inspected for abnormal heating, discoloration or signs of loose connections.

Motor Connections

Motor output cables, grounding connections and terminations should be inspected periodically.

Cabinet Environment

The cabinet should be kept within the specified temperature and environmental conditions.

Fault History

Repeated overcurrent, overtemperature or DC-bus faults should be investigated instead of simply resetting the drive.

Ventilation

The airflow path should remain unobstructed.

Grounding

Grounding and bonding connections should be maintained properly.

Mechanical Support

The drive mounting structure and cable supports should be inspected where vibration or mechanical stress is present.

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34. Important Selection Considerations

When selecting the 20G14TF265AN0NNNNN, several points deserve particular attention.

First, verify the motor voltage.

The motor must be suitable for the 690 VAC-class drive system.

Second, verify the motor current.

The full-load current is more important than horsepower alone.

Third, check the duty classification.

A 250 kW motor may not be suitable simply because the nameplate power appears to match the drive.

The motor’s actual current and torque requirements must be considered.

Fourth, evaluate acceleration requirements.

High-inertia machinery may require more torque during acceleration.

Fifth, evaluate braking requirements.

Because this configuration has no dynamic braking, machines with rapid stopping or high regenerative energy should be evaluated carefully.

Sixth, evaluate cooling.

Frame 8 equipment requires adequate ventilation and heat removal.

Seventh, verify physical dimensions.

Cabinet fabrication should be based on the final mechanical configuration.

Eighth, verify weight.

The final configured weight should be used for lifting and transportation planning.

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35. Product Advantages at a Glance

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36. Complete Technical Summary

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37. Final Product Evaluation

The Allen-Bradley 20G14TF265AN0NNNNN is a high-power PowerFlex 755 drive intended for large industrial motor applications, particularly where a 690 VAC three-phase system is required.

Its approximately 265 A current class, 250 kW-class Light Duty and Normal Duty capability, 200 kW-class Heavy Duty capability, Frame 8 construction, forced-air cooling and EMC filtering make it suitable for large industrial equipment.

It is especially appropriate for large pumps, fans, blowers, conveyors, mixers, agitators and process machinery.

The 690 VAC architecture is a major advantage for installations using high-voltage industrial motors. It allows the drive to be integrated into a plant electrical system designed around 690 VAC equipment rather than requiring the motor to operate from a lower-voltage distribution system.

The drive also provides the practical advantages associated with variable-frequency motor control: adjustable speed, controlled acceleration, controlled deceleration, improved process control and the possibility of energy savings in suitable applications.

The Frame 8 construction means that mechanical installation should be taken seriously. Cabinet space, cooling, cable routing, service access, lifting arrangements and final equipment weight should all be established before installation.

For physical specifications, the safest engineering approach is to use configuration-dependent dimensions and weight until the final mechanical configuration has been established.

Overall, the 20G14TF265AN0NNNNN is best regarded as a large-frame, 690 VAC PowerFlex 755 drive for approximately 250 kW-class industrial motor applications, with particular value in high-power pumps, fans, blowers, conveyors and process equipment where reliable variable-speed control is required.