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Allen-Bradley 20G14TE355AN0NNNNN — PowerFlex 755 High-Power AC Drive

1. Product Overview

The Allen-Bradley 20G14TE355AN0NNNNN is a high-power industrial AC drive from the PowerFlex 755 series. It is designed for controlling large three-phase AC motors in demanding industrial environments where adjustable speed, controlled acceleration, process stability, and high output current are required.

The model belongs to the high-power section of the PowerFlex 750 family. It is based on a Frame 8 drive platform and is intended for installation in industrial electrical cabinets or engineered drive systems rather than small machine-level enclosures.

The 20G14TE355AN0NNNNN is a high-voltage DC-input configuration used within an approximately 810 VDC class common DC-bus architecture. The drive converts DC electrical energy into controlled three-phase AC output for the connected motor.

This model is particularly suitable for large pumps, industrial fans, blowers, compressors, conveyors, mixers, process machinery, material-handling systems, and other large rotating equipment.

The principal output rating is approximately 355 A in Normal Duty operation. Depending on the selected application duty, the same drive platform can be used at different current and motor-power ratings.

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2. Brand and Product Series

The PowerFlex 755 series is intended for industrial applications where motor operation must be integrated into a larger automation and power-control system.

The 20G14TE355AN0NNNNN is positioned above the 295 A class and is suitable for applications requiring a higher continuous current capacity.

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3. Main Technical Parameters

*Dimensions and weight are planning-level values because the final mechanical arrangement can vary according to the exact drive assembly, power connections, mounting configuration, associated equipment, and shipping arrangement.

For cabinet fabrication, replacement engineering, lifting, and transportation, the exact mechanical data should be verified for the complete configuration.

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4. Output Current and Duty Ratings

The PowerFlex 755 high-power platform allows the drive to be applied under different duty conditions.

The Light-Duty rating is generally suitable for applications with relatively moderate overload requirements, especially variable-torque equipment such as centrifugal pumps and industrial fans.

The Normal-Duty rating provides a balanced operating range for many large industrial machines.

The Heavy-Duty rating is intended for more demanding loads that require greater torque capability or higher overload performance.

For correct drive selection, the motor’s actual full-load current should always be compared with the applicable drive current rating.

Motor horsepower alone should not be used as the only selection criterion.

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5. Product Introduction

The 20G14TE355AN0NNNNN is designed for industrial systems where a large electric motor must operate at different speeds rather than continuously running at full speed.

A variable-frequency drive controls the motor by producing a controlled output voltage and frequency.

This allows the motor speed to follow the actual requirements of the driven equipment.

The result can be smoother operation, reduced mechanical stress, improved process control, and improved energy management for suitable applications.

The 355 A Normal-Duty rating places this drive in the large-motor category.

It is suitable for industrial installations where pumps, fans, conveyors, compressors, or other rotating machines require approximately 300–400 HP-class motor control, depending on the application duty.

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6. High-Voltage DC Input Architecture

The 20G14TE355AN0NNNNN is configured for high-voltage DC input.

Its operating input range is approximately 729–891 VDC, making it suitable for an approximately 810 VDC class DC-bus system.

The DC input is supplied to the drive’s power section.

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

This type of configuration can be useful in engineered common DC-bus systems.

Multiple drive systems can sometimes be designed around a shared power-conversion architecture, depending on the overall installation.

The final system design may include a common DC bus, dedicated converter equipment, energy-management equipment, or other associated high-power components.

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7. Frame 8 Mechanical Platform

The 20G14TE355AN0NNNNN uses a Frame 8 mechanical design.

This frame category is intended for high-power applications and requires significantly more installation space than compact VFD products.

The drive should be incorporated into the overall electrical design at an early stage.

Important mechanical considerations include:

• Cabinet dimensions.
• Floor or panel loading.
• Structural support.
• Airflow.
• Cable access.
• Power terminal clearance.
• Maintenance access.
• Electrical safety clearance.
• Mechanical lifting arrangements.

Due to the size and weight of this equipment, mechanical handling equipment is normally required during installation.

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8. Dimensions and Weight

*The exact dimensions and weight can vary according to the specific drive assembly and final mechanical configuration.

For engineering purposes, the dimensions should be confirmed before manufacturing a cabinet or preparing a replacement installation.

The weight should also be verified before transportation or lifting operations.

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9. Product Applications

9.1 Large Pump Systems

Large industrial pumps are one of the most suitable applications for this drive.

Pumping systems frequently experience changing process demand.

Instead of operating the motor continuously at full speed and controlling flow entirely through valves, the drive can adjust motor speed according to the required flow.

Typical applications include:

• Water-treatment plants.
• Wastewater facilities.
• Cooling-water systems.
• Industrial process-water systems.
• Large circulation pumps.
• Chemical-process pumps.
• Industrial pumping stations.
• Irrigation systems.

The drive can also provide controlled acceleration, reducing sudden mechanical stress on the motor, pump, coupling, and pipework.

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9.2 Industrial Fans

Large industrial fans can consume substantial amounts of electrical energy.

Applications may include:

• Dust collection.
• Process ventilation.
• Industrial exhaust.
• Furnace systems.
• Cooling systems.
• Cement production.
• Mining ventilation.
• Large air-handling equipment.

Variable-torque fan applications may be particularly suitable for the Light-Duty operating range.

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9.3 Blowers

Industrial blowers require controlled speed in many process applications.

The drive can be used to adjust airflow or pressure according to production requirements.

Blower applications may include process air, combustion air, aeration systems, and industrial ventilation.

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9.4 Conveyors

Large conveyors often have substantial inertia and mechanical loading.

Controlled acceleration can reduce shock loading on the mechanical system.

The drive can help improve the operation of:

• Bulk-material conveyors.
• Production conveyors.
• Mining conveyors.
• Processing conveyors.
• Transfer systems.

For high starting torque or demanding conveyor applications, the Heavy-Duty rating should be evaluated.

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9.5 Compressors

Large industrial compressors may require substantial motor capacity.

The drive can adjust compressor speed according to process requirements.

Correct selection should consider the specific compressor type and its torque characteristics.

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9.6 Mixers and Agitators

Mixing applications can experience variable mechanical loading.

The material being processed may change viscosity and resistance during operation.

The drive can provide adjustable speed control for suitable mixer and agitator applications.

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9.7 Process Machinery

The drive can also be considered for general process equipment where large motors require controlled operation.

Examples include:

• Process pumps.
• Feed systems.
• Material-processing machines.
• Industrial rotating equipment.
• Production systems.

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10. Main Product Advantages

10.1 High Current Capacity

The 355 A Normal-Duty current rating makes the drive suitable for large industrial motors.

It provides considerably more capacity than the 295 A version while remaining within the Frame 8 high-power platform.

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10.2 Flexible Duty Ratings

This flexible rating structure allows the drive to be matched more accurately to the load.

A large centrifugal fan and a heavily loaded conveyor may have similar motor horsepower but very different overload requirements.

The duty category helps account for these differences.

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10.3 High-Power DC-Bus Compatibility

The high-voltage DC-input design is suitable for large engineered power systems.

It can be used in installations designed around a common DC-bus architecture.

This may simplify certain high-power multi-drive arrangements when the complete electrical system is designed for common-bus operation.

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10.4 Large-Motor Capability

The drive is suitable for approximately 300–400 HP-class motors, depending on the application duty.

This makes it appropriate for industrial systems beyond the capacity range of standard low-power machine drives.

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10.5 Controlled Motor Acceleration

Controlled acceleration can reduce sudden mechanical stress.

This can be valuable for equipment with:

• High inertia.
• Long shafts.
• Large gearboxes.
• Conveyor systems.
• Pumps.
• Couplings.
• Heavy rotating components.

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10.6 Improved Process Control

Motor speed can be adjusted to meet actual process demand.

This can improve control of:

• Flow.
• Pressure.
• Air volume.
• Conveyor speed.
• Material movement.
• Production rates.

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10.7 Forced-Air Thermal Management

The drive uses forced-air cooling to manage heat generated by the high-power electronic components.

Proper airflow through the electrical enclosure is essential.

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11. Five Recommended Same-Series or Related Models

The following models are closely related to the 20G14TE355AN0NNNNN and provide different current capacities within the high-power PowerFlex 755 range.

The 20G14TE295AN0NNNNN is a suitable lower-capacity alternative when approximately 250–350 HP motor control is required.

The 20G14TE395AN0NNNNN provides additional capacity for approximately 400 HP Normal-Duty applications.

The 20G14TE435AN0NNNNN is suitable for larger 450 HP Normal-Duty systems.

The 20G14TE460AN0NNNNN and 20G14TE510AN0NNNNN provide progressively higher current capacity for large industrial motors.

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12. Same-Series Comparison

The requested model occupies a useful position in the middle of this group.

It provides substantially more capacity than the 295 A model while avoiding the higher current and larger system requirements associated with the largest models.

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13. Five Popular Related Models from the Same Brand

The smaller models are suitable for general industrial motors.

The 545 A and 740 A configurations are intended for substantially larger applications requiring significantly higher output current.

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14. Selection According to Application

The actual duty selection should be based on the motor current and mechanical load.

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15. Installation Considerations

Before installation, the following points should be checked.

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16. Cooling and Thermal Management

High-power drives generate significant heat during operation.

The forced-air cooling system requires a suitable airflow path.

Cabinet design should consider:

• Ambient temperature.
• Air intake.
• Air exhaust.
• Internal heat generation.
• Filter condition.
• Fan performance.
• Installation altitude.

Blocked airflow can increase internal temperature and may reduce equipment life.

Regular maintenance of filters and cooling components is therefore important.

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17. Grounding and Electrical Installation

Proper grounding is essential for high-power drive installations.

The motor, drive, cabinet, and associated equipment should be integrated into an appropriate grounding and bonding system.

Control cables should be routed away from high-current power cables whenever practical.

Communication wiring should also be installed according to appropriate industrial wiring practices.

Good installation methods can help reduce:

• Electrical interference.
• Communication errors.
• Instrumentation problems.
• Unexpected faults.
• Noise-related control issues.

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18. Maintenance Requirements

Routine maintenance should focus on the power and cooling systems.

Important inspection areas include:

• Cooling fans.
• Air filters.
• Air passages.
• Power terminals.
• Grounding connections.
• Motor cables.
• Cabinet temperature.
• Fault history.

Repeated faults should be investigated rather than continuously reset.

A drive fault may sometimes be caused by the motor, mechanical load, power supply, cooling system, or cable installation.

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19. Product Advantages Summary

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20. Final Technical Summary

*Final dimensions and weight depend on the exact mechanical configuration and should be confirmed before installation.

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21. Conclusion

The Allen-Bradley 20G14TE355AN0NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor applications.

Its main characteristics include approximately 395 A Light-Duty output capability, 355 A Normal-Duty continuous current, and 295 A Heavy-Duty continuous current.

The corresponding motor range is approximately 400 HP in Light Duty, 350 HP in Normal Duty, and 300 HP in Heavy Duty.

The drive uses a high-voltage DC input architecture and is suitable for approximately 810 VDC class industrial DC-bus systems.

Its Frame 8 construction makes it appropriate for substantial industrial installations, including large pumps, fans, blowers, conveyors, compressors, material-handling systems, and process machinery.

The major advantages of this model are its high current capacity, flexible duty ratings, compatibility with high-power DC-bus architectures, controlled motor acceleration, and suitability for large industrial motors.

For mechanical planning, the drive should be treated as a major electrical component. Its dimensions are approximately within the 600 × 600 × 2,400–2,500 mm class, with a planning-level weight of approximately 275–300 kg, although the final values should be confirmed for the exact configuration before transportation, lifting, cabinet design, or installation.

For final drive selection, the motor’s actual current, torque characteristics, overload requirement, acceleration demand, operating environment, and system architecture should all be evaluated together.