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Allen-Bradley 20G14TE295AN0NNNNN — PowerFlex 755 High-Power DC-Input AC Drive

1. Product Overview

The Allen-Bradley 20G14TE295AN0NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control applications. It belongs to the PowerFlex 750 Series family and is intended for applications where high current capacity, stable motor control, flexible duty ratings, and integration into a larger industrial automation system are required.

This model is a DC-input PowerFlex 755 configuration, rather than a conventional low-power AC-input drive. It is rated for a DC input voltage range of approximately 729–891 VDC and uses a three-phase output architecture suitable for large industrial motors.

The 20G14TE295AN0NNNNN is rated at approximately 295 A continuous output current in Normal-Duty operation, with a higher Light-Duty capability and a lower Heavy-Duty motor-power rating. The base 20G14TE295 configuration is associated with Frame 8 when used as a single drive.

This makes the model particularly suitable for large pumps, fans, blowers, conveyors, compressors, process machinery, material-handling equipment, and other large rotating machines.

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2. Brand and Product Series

The PowerFlex 755 Series is designed for applications ranging from general industrial machinery to large process systems.

Compared with smaller variable-frequency drives, this model is intended for substantially larger motors and installations where the drive becomes an important part of the plant’s power-conversion system.

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3. Detailed Technical Parameters

The current ratings are especially important because this model has different output capabilities depending on the selected duty category.

The 355 A Light-Duty rating permits the drive to operate with larger motor capacity when the load has relatively moderate overload requirements.

The 295 A Normal-Duty rating is the key continuous rating for many general industrial applications.

The 272 A Heavy-Duty rating is used when the application requires a more demanding overload profile, although the drive can provide short-duration current substantially above its continuous Heavy-Duty rating.

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4. Power and Current Ratings

The following table provides a more detailed view of the drive’s current capability.

This rating structure is one of the most useful features of the PowerFlex 755 high-power platform.

The same basic drive can be applied to different types of machines depending on how demanding the motor load is.

A large centrifugal fan may be able to use the higher Light-Duty motor rating because the torque requirement is relatively predictable.

A conveyor or mixer with substantial starting torque may require a more conservative Heavy-Duty selection.

For this reason, motor horsepower should never be considered independently from motor current and load characteristics.

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5. DC Input Architecture

The 20G14TE295AN0NNNNN is fundamentally different from a conventional small AC-input VFD because it is designed around a high-voltage DC input.

The specified input range is approximately 729–891 VDC, with the configuration commonly associated with an 810 VDC class DC supply.

This type of architecture is particularly useful in engineered industrial systems where the DC bus is supplied by a dedicated front-end converter, regenerative system, common DC-bus arrangement, or other high-power DC source.

The DC bus becomes the intermediate energy source for the inverter section.

The inverter then converts the DC energy into controlled three-phase output power for the motor.

This architecture can be especially valuable in large systems where several drives share a common power-conversion infrastructure.

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6. Why the DC-Input Configuration Matters

The DC-input architecture provides several potential advantages in a large industrial installation.

Instead of every individual drive necessarily having its own independent AC-to-DC front end, a larger engineered system can use a common DC power architecture.

This can be useful when multiple motors are installed in the same production system.

It can also be beneficial in applications where energy can move between different drives through a common DC bus.

For example, during deceleration, energy produced by one motor can potentially be managed through the overall DC-bus architecture rather than being treated as an isolated event.

The actual energy-management strategy depends on the complete system design, including the front end, braking system, DC bus, and connected drives.

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7. Frame 8 Construction

The base 20G14TE295 drive uses Frame 8 construction.

Frame 8 is intended for high-power industrial equipment and is physically much larger than the smaller drive frames commonly found in machine-control applications.

A Frame 8 installation normally requires careful attention to:

• Cabinet dimensions.
• Mounting.
• Power cable routing.
• Airflow.
• Service clearance.
• Grounding.
• Mechanical support.
• Lifting arrangements.
• Electrical clearances.
• Maintenance access.

The size of the equipment should be considered during the early stages of system design rather than after the electrical cabinet has already been fabricated.

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8. Dimensions and Weight

Because this is a large Frame 8 drive, the mechanical data deserves special attention.

For this model, dimensions and weight should not be treated as universal values for every possible packaged arrangement.

The base drive, mounting hardware, power connections, cabinet assembly, disconnect equipment, cooling equipment, and other options can change the final dimensions and total weight.

For a replacement project, the safest approach is to verify the exact mechanical drawing before manufacturing a cabinet.

For transportation, lifting, and installation planning, the shipping configuration should also be considered separately from the installed drive.

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9. Product Introduction

The 20G14TE295AN0NNNNN occupies an important position within the PowerFlex 755 high-power range.

It is considerably larger than the PowerFlex 755 models used for small and medium industrial motors, but it is smaller than the very large multi-module configurations used for extremely high-current applications.

With a Normal-Duty rating of approximately 300 HP, it is a practical choice for many large industrial motors.

The Light-Duty rating reaches approximately 350 HP, while Heavy-Duty service is approximately 250 HP.

This makes the drive particularly useful for applications where the motor is large enough to require a high-power drive but does not require the enormous current capacity of the 500–700 HP class units.

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10. Typical Applications

10.1 Large Pumping Systems

Large pumps are one of the most common applications for this class of drive.

Industrial plants often need to vary pump flow according to production requirements.

Using a variable-speed drive allows the pump motor speed to be adjusted instead of relying entirely on mechanical throttling.

Typical applications include:

• Water treatment.
• Wastewater treatment.
• Cooling water.
• Industrial process water.
• Irrigation.
• Chemical processing.
• Utility pumping.
• Large circulation systems.

The drive can provide controlled acceleration and deceleration, reducing mechanical stress on the pump and connected piping.

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10.2 Industrial Fans

Large fans and blowers can require hundreds of horsepower in heavy industrial facilities.

Applications may include:

• Furnace fans.
• Cooling fans.
• Process ventilation.
• Dust collection.
• Exhaust systems.
• Cement production.
• Steel production.
• Mining ventilation.

Fans are often variable-torque loads, making the Light-Duty rating potentially attractive when the motor and operating conditions are suitable.

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10.3 Conveyors

Large conveyors can have significant inertia.

A sudden application of full motor torque can place substantial stress on belts, shafts, gearboxes, couplings, and mechanical structures.

A properly configured PowerFlex 755 drive can provide controlled acceleration.

For conveyor applications with high starting loads, the Normal-Duty or Heavy-Duty rating should be evaluated carefully.

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10.4 Compressors

Industrial compressors can require substantial motor power and carefully controlled acceleration.

The drive can be integrated into a larger control system to adjust compressor speed according to process demand.

Compressor applications should be evaluated carefully because compressor torque characteristics vary considerably by compressor type.

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10.5 Mixers and Agitators

Large mixers can experience rapidly changing torque.

The load can increase significantly depending on material viscosity, batch conditions, temperature, or process stage.

The 20G14TE295AN0NNNNN can be considered for these applications when the actual current and overload requirements remain within the selected duty rating.

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10.6 Material Handling

Large material-handling systems often use high-power motors.

Potential applications include:

• Conveyors.
• Feeders.
• Elevators.
• Hoists.
• Processing machinery.
• Bulk material equipment.

The actual suitability depends strongly on torque and braking requirements.

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10.7 Mining

Mining equipment often requires large motors and robust speed control.

Potential applications include:

• Mine ventilation.
• Large pumps.
• Conveyors.
• Processing equipment.
• Material feeders.

Mining environments also require special consideration of dust, temperature, vibration, enclosure design, and maintenance procedures.

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10.8 Cement and Heavy Process Industries

Large fans, pumps, conveyors, crushers, and processing machines are common in cement plants.

The PowerFlex 755 platform can provide a standardized approach to motor control across different parts of a large production facility.

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11. Main Product Advantages

11.1 High Current Capability

The 20G14TE295AN0NNNNN provides a substantial current capacity in a single Frame 8 drive configuration.

The 295 A Normal-Duty continuous rating makes it suitable for approximately 300 HP-class industrial motors.

The 355 A Light-Duty rating extends the useful motor capacity to approximately 350 HP for suitable applications.

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11.2 Flexible Duty Selection

One of the major advantages is the ability to select the drive according to actual application duty.

This is more useful than having only one fixed horsepower rating.

An engineer can evaluate the motor and load together rather than simply choosing a drive based on the motor’s nameplate horsepower.

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11.3 High-Voltage DC-Bus Capability

The approximately 810 VDC class architecture makes the drive appropriate for high-power DC-bus applications.

This can be particularly useful where several drives are connected to a common DC system.

Such architectures can be used in large industrial installations where energy management and power distribution are engineered at system level.

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11.4 Large Motor Compatibility

The drive is designed specifically for large motors.

Its 250–350 HP application range covers a useful section of industrial machinery.

It is therefore appropriate for installations where smaller drive families would not provide sufficient current.

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11.5 PowerFlex 755 Platform

The PowerFlex 755 platform provides a common approach to drive configuration and control across a broad range of applications.

For plants already using the same series, this can reduce training requirements and simplify maintenance.

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11.6 Industrial Automation Integration

The PowerFlex 755 platform can be integrated into larger industrial automation systems.

Depending on the complete configuration, control and monitoring can be integrated with plant-level automation.

This is useful for applications where motor speed is part of a broader process-control strategy.

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11.7 Forced-Air Cooling

Forced-air cooling provides a practical method for removing heat from high-power semiconductor components.

It allows the drive to operate at a substantial current level without requiring an oversized passive heat sink arrangement.

The cooling system does, however, become an important maintenance item.

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12. Five Recommended Same-Series Models

The following models are closely related PowerFlex 755 high-power DC-input configurations.

These models provide a logical progression upward from the 295 A class.

The 20G14TE355AN0NNNNN is the closest higher-capacity option and is useful when the motor is near the upper end of the 20G14TE295’s Light-Duty range.

The 20G14TE395AN0NNNNN and 20G14TE435AN0NNNNN provide additional capacity for motors in the 400–450 HP class.

The 20G14TE460AN0NNNNN and 20G14TE510AN0NNNNN move into the 500 HP-class range.

All of these models should be selected according to the actual motor current and duty requirements rather than horsepower alone.

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13. Same-Series Comparison

The 20G14TE295 is therefore positioned at the lower end of this particular high-power DC-input group.

It is a good choice when approximately 250–350 HP of motor capacity is required, depending on the duty category.

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14. Five Related Popular Models from the Same Brand

For a broader product selection, the following models are useful related choices.

The smaller 34 A, 52 A, and 77 A configurations are intended for substantially smaller motors than the 20G14TE295.

The 545 A and 740 A configurations belong to a much higher current range and are appropriate when the motor power is significantly greater.

These models should not be treated as direct replacements for one another simply because they belong to the same product family.

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15. 20G14TE295 Compared with 20G14TD740

The difference between these two high-power configurations is significant.

The 20G14TE295 is therefore much more appropriate for approximately 250–350 HP-class applications.

The 20G14TD740 is designed for considerably larger motors.

Selecting between them should be based on the actual motor current and duty requirement.

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16. Product Selection by Application

The actual application rating must be confirmed against the motor’s current and load profile.

For example, a 300 HP centrifugal pump may be a very comfortable application, while a 300 HP crusher could require a much more detailed Heavy-Duty evaluation.

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17. Motor Selection

Motor nameplate information should be collected before finalizing the drive.

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

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18. Cooling and Thermal Design

The drive’s forced-air cooling system is a key part of the installation.

The cabinet should be designed to remove the heat generated by the drive and other electrical components.

The following should be considered:

• Ambient temperature.
• Cabinet temperature.
• Airflow direction.
• Fan capacity.
• Filter condition.
• Air intake.
• Exhaust path.
• Internal heat sources.
• Installation altitude.
• Motor cable heat.
• Nearby electrical equipment.

A high-power drive should never be installed in a sealed cabinet without verifying the thermal design.

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19. EMC and Grounding

High-power switching equipment can produce electrical noise.

Proper grounding and bonding are therefore important.

The motor cable, drive chassis, cabinet, motor frame, and other relevant metallic structures should be integrated into a suitable grounding system.

Control wiring should be separated from high-current motor wiring wherever practical.

Communication cables should also be routed carefully.

Good installation practice can significantly reduce the possibility of:

• Communication errors.
• Sensor interference.
• Control instability.
• Unwanted trips.
• Electrical noise.
• Instrumentation problems.

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20. Installation Considerations

Before installing the 20G14TE295AN0NNNNN, the following should be confirmed.

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21. Maintenance Recommendations

Maintenance should focus heavily on the cooling system and power connections.

Fans should be inspected periodically for unusual noise, vibration, or reduced airflow.

Air passages should remain clean.

Where cabinet filters are used, they should be inspected regularly.

Power connections should be checked for signs of overheating, discoloration, or loose connections.

Grounding connections should also be inspected.

Fault history should be reviewed when abnormal operation occurs.

Repeated overcurrent, overtemperature, or DC-bus faults should not simply be reset without investigating the underlying mechanical or electrical cause.

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22. Advantages for System Standardization

For an industrial plant using multiple PowerFlex 755 drives, standardizing on the same platform can provide practical benefits.

Maintenance personnel can become familiar with a common operating structure.

Programming and parameter-management procedures can be standardized.

Spare-parts planning can become easier.

Troubleshooting can also be more consistent.

This is especially valuable in large production facilities where multiple motor sizes are used throughout the plant.

The 20G14TE295 can serve as a high-power member of the same general platform while smaller models can cover lower-power motors.

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23. Important Points Before Purchase

The following items should be confirmed before ordering the 20G14TE295AN0NNNNN for a new installation or replacement.

1. Confirm the DC supply.

This model is a high-voltage DC-input configuration. It should not be treated as a standard 480 VAC-input VFD.

2. Confirm the DC voltage range.

The approximately 729–891 VDC range is an important selection parameter.

3. Confirm motor current.

Motor full-load current should be compared with the Light-Duty, Normal-Duty, or Heavy-Duty rating.

4. Confirm load type.

A centrifugal pump is very different from a crusher or heavily loaded conveyor.

5. Confirm braking.

If rapid deceleration is required, the complete braking architecture should be evaluated.

6. Confirm cabinet dimensions.

Frame 8 equipment requires substantial physical space.

7. Confirm weight.

Lifting and transportation should be planned before installation.

8. Confirm cooling.

Forced-air cooling requires adequate ventilation.

9. Confirm motor cable requirements.

Cable length and construction can affect the installation.

10. Confirm control architecture.

Make sure the drive’s communication and control functions match the plant automation system.

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24. Overall Product Advantages

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25. Final Technical Summary

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26. Conclusion

The Allen-Bradley 20G14TE295AN0NNNNN is a high-power PowerFlex 755 drive intended for large industrial motor applications.

Its most important characteristics are the 729–891 VDC input range, approximately 810 VDC nominal DC-bus class, three-phase output, 355 A Light-Duty current, 295 A Normal-Duty current, 272 A Heavy-Duty continuous current, and Frame 8 construction.

In terms of motor capacity, the drive is approximately a 350 HP Light-Duty, 300 HP Normal-Duty, and 250 HP Heavy-Duty solution.

The model is particularly attractive for large pumps, industrial fans, blowers, conveyors, compressors, mixers, material-handling equipment, mining systems, cement plants, and other large process machines.

Its DC-input architecture also makes it different from a conventional AC-input VFD. It is better suited to engineered high-voltage DC-bus systems where the drive forms part of a larger power-conversion architecture.

The strongest advantages are its high current capability, flexible duty ratings, high-voltage DC input, Frame 8 construction, large-motor compatibility, and PowerFlex 755 platform architecture.

For selection purposes, the most important rule is to size the drive according to actual motor current, load torque, overload requirements, and operating duty rather than horsepower alone.

For dimensions and weight, the appropriate approach is to treat them as configuration-dependent and confirm the exact Frame 8 mechanical arrangement before cabinet fabrication, transportation, lifting, or replacement work.

Overall, the 20G14TE295AN0NNNNN is a strong choice for large 250–350 HP class industrial motor applications, particularly where a high-voltage DC input and a high-power PowerFlex 755 architecture are required.