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1. Product Overview

The 20G14TD545AN0NNNNN is a high-power PowerFlex 755 AC packaged drive designed for demanding industrial motor-control applications.

It is an air-cooled, open-type drive with a DC input and precharge, a 650 VDC power class, and a 545 A power rating. It is intended for large three-phase AC motor systems and is suitable for applications where conventional fixed-speed motor operation does not provide sufficient control over speed, acceleration, torque, or process output.

The model is associated with the PowerFlex 755 family and represents a high-power configuration intended for large industrial installations.

Its approximate motor capacity is 450 HP / 335 kW for Normal Duty, with a 350 HP Heavy Duty rating. The exact usable motor capacity should always be matched against the actual motor nameplate current, duty cycle, overload requirement, and operating conditions.

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2. Brand and Series

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3. Detailed Technical Parameters

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4. Electrical Characteristics

The 20G14TD545AN0NNNNN is a particularly high-capacity drive. Its 545 A rating is the most important electrical characteristic when determining whether the product is suitable for a particular motor.

The drive is designed around a 650 VDC power class, making it different from a basic standalone AC-input drive. The DC-input architecture allows it to be used in compatible DC-bus systems and high-power drive arrangements.

The 480 VAC designation identifies the associated AC voltage class used within the drive system.

For a 450 HP-class motor, the actual motor current should always be checked rather than selecting the drive from horsepower alone. Motor efficiency, power factor, overload requirements, motor voltage, operating temperature and application duty can all affect the final selection.

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5. Duty Ratings

Duty rating is especially important when using a high-power drive.

The model is generally associated with approximately 450 HP Normal Duty and 350 HP Heavy Duty capability.

Normal Duty is generally more suitable for applications where the motor load is relatively steady and overload requirements are moderate.

Heavy Duty applications require greater overload capability and are more common in applications with high starting torque, frequent acceleration, heavy material handling, or substantial transient loading.

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6. DC Input with Precharge

One of the defining characteristics of this model is its DC input with precharge arrangement.

The drive is not simply a small standalone AC-input VFD. It is part of a higher-power architecture in which the DC bus and associated power-conversion equipment play an important role.

The precharge system helps manage the initial charging of the DC-bus capacitors when the system is energized.

This is particularly important in high-power systems because directly applying full voltage to a large capacitor bank can create a very large initial current.

The precharge function therefore forms an important part of the high-power electrical architecture.

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7. Air-Cooled Construction

The product uses an air-cooled arrangement.

High-power semiconductor devices generate heat during operation. Adequate airflow is therefore essential for maintaining the correct operating temperature.

The installation should provide sufficient:

• Ventilation.
• Cooling airflow.
• Cabinet heat dissipation.
• Service clearance.
• Separation from heat-producing equipment.
• Ambient-temperature control.

The cooling system should also be considered when multiple high-power drives are installed inside the same electrical room or cabinet.

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8. Open-Type / IP00 Construction

The product uses an open-type IP00 construction.

This means the drive itself should not be considered a complete protective enclosure.

In a normal industrial installation, it needs to be installed inside a properly designed electrical cabinet, enclosure, equipment room or other suitable protected environment.

The final installation should protect the drive from:

• Dust.
• Water.
• Condensation.
• Conductive contamination.
• Chemical contamination.
• Accidental contact.
• Excessive temperature.
• Mechanical damage.

This arrangement also allows the system designer to determine the overall cabinet configuration according to the plant’s requirements.

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9. EMC Filtering

The 20G14TD545AN0NNNNN includes an EMC filtering configuration.

Electromagnetic compatibility becomes increasingly important as drive power increases.

High-frequency switching can produce electrical noise that may affect nearby:

• PLC equipment.
• Sensors.
• Communication equipment.
• Instrumentation.
• Control wiring.
• Measurement systems.
• Other electronic devices.

Correct grounding, cable routing, motor cable shielding and cabinet layout should therefore be considered together with the drive’s internal filtering.

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10. CM Jumper Removed

The model has the CM jumper removed configuration.

This is an important detail when replacing the drive.

The common-mode configuration affects the electrical relationship between the drive’s internal circuitry, motor system and grounding arrangement.

For this reason, a replacement drive should not be selected solely by matching:

• Voltage.
• Horsepower.
• Current.

The replacement should also match the intended common-mode and filtering configuration.

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11. No HIM Configuration

The catalog configuration does not include a standard HIM operator interface.

This means the drive does not rely on a permanently installed local keypad as part of this particular configuration.

That arrangement can be useful in centralized industrial control systems where the drive is controlled through:

• PLC systems.
• Distributed control systems.
• Industrial communication networks.
• Remote operator stations.
• Supervisory control systems.

For a machine builder, this also allows the operator interface to be designed independently from the physical drive.

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12. Product Introduction

The 20G14TD545AN0NNNNN is designed for large industrial motor systems where precise speed control and high-current capability are required.

A traditional fixed-speed motor normally operates directly from the electrical supply. Its speed is largely determined by the supply frequency and motor characteristics.

A variable-frequency drive changes this operating concept.

The drive can regulate the electrical conditions supplied to the motor, allowing the motor speed to be adjusted according to the process.

This is particularly useful in applications where the mechanical load changes during operation.

For example, a large pump may need maximum output during one production stage but considerably less flow during another stage.

A large fan may need different airflow depending on temperature or production requirements.

A conveyor may require a controlled acceleration profile rather than an abrupt start.

A compressor may need to respond continuously to changes in system demand.

In these applications, variable-speed control can provide much greater flexibility than fixed-speed operation.

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13. Main Product Applications

13.1 Large Pump Systems

The drive is well suited to large industrial pump applications.

Typical uses include:

• Water-transfer pumps.
• Process-water pumps.
• Cooling-water systems.
• Wastewater systems.
• Industrial circulation systems.
• Irrigation systems.
• Large pumping stations.
• Water-treatment equipment.

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

This can also reduce the need for constant mechanical throttling.

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13.2 Large Fans and Blowers

Large fans can require hundreds of horsepower, especially in industrial processing facilities.

Possible applications include:

• Industrial ventilation.
• Exhaust systems.
• Combustion-air systems.
• Cooling systems.
• Dust collection.
• Process-air systems.
• Large air-handling equipment.

The drive allows airflow to be adjusted by changing motor speed.

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13.3 Compressors

Large compressors are another suitable application.

Possible uses include:

• Industrial compressed-air systems.
• Process gas systems.
• Refrigeration systems.
• Manufacturing equipment.
• Chemical processing.

Controlled acceleration can reduce mechanical stress during startup.

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13.4 Conveyor Systems

The model can be used for high-power conveyor systems.

Examples include:

• Mining conveyors.
• Bulk-material handling.
• Cement plants.
• Aggregate handling.
• Steel processing.
• Large manufacturing conveyors.

Variable-speed control can be useful when conveyor speed must be adjusted according to production requirements.

Controlled acceleration is also valuable for reducing mechanical shock.

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13.5 Material-Handling Equipment

Large material-handling systems often require controlled motor torque.

The drive can be used in systems involving:

• Bulk materials.
• Heavy production materials.
• Continuous-process equipment.
• Large industrial transport systems.

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13.6 Mixers and Agitators

Some industrial mixers require substantial motor power.

Variable-speed control allows the motor speed to be adjusted for different materials and process stages.

Applications can include:

• Chemical mixing.
• Industrial blending.
• Water treatment.
• Process manufacturing.
• Large-scale material preparation.

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13.7 Extrusion and Process Machinery

Large extrusion and process machines can also benefit from adjustable-speed motor control.

The drive can help maintain controlled operating speed throughout a production process.

This can be particularly useful where production speed directly affects:

• Material flow.
• Product quality.
• Production rate.
• Machine loading.
• Mechanical stress.

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14. Main Product Advantages

14.1 High-Current Capability

The 545 A rating is the main advantage of this configuration.

It allows the product to serve large motors that would be beyond the capacity of smaller industrial drives.

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14.2 Large Motor Capacity

With approximately 450 HP / 335 kW Normal Duty capability, this model is suitable for substantial industrial machinery.

It is intended for applications where high motor power is required continuously.

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14.3 Adjustable Motor Speed

The drive provides variable-speed operation.

This allows the motor to operate at a speed appropriate to the process instead of running continuously at one fixed speed.

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14.4 Controlled Acceleration

A large motor can impose significant mechanical stress on the driven equipment during startup.

The drive can provide controlled acceleration.

This can help reduce stress on:

• Motors.
• Couplings.
• Gearboxes.
• Belts.
• Shafts.
• Pumps.
• Conveyors.

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14.5 Improved Process Control

Motor speed can become a controllable process variable.

This is valuable in applications where output must follow changing production requirements.

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14.6 High-Power Industrial Architecture

The PowerFlex 755 architecture provides a scalable approach to large motor systems.

Different current configurations allow engineers to select a suitable power level without completely changing the overall drive family.

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14.7 DC-Bus Capability

The DC-input architecture makes the product suitable for compatible DC-bus arrangements.

This can be useful in installations involving multiple drives or specialized power-conversion systems.

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14.8 Flexible Installation

The open-type construction allows the drive to be integrated into a larger electrical system.

The overall cabinet can be designed around the requirements of the plant.

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15. Mechanical Dimensions and Weight

Mechanical information deserves special attention with this model.

The available product information identifies a listed weight of approximately 32 lb, which converts to approximately 14.5 kg.

However, the exact physical dimensions are configuration-dependent.

Because this is a high-power modular/packaged-drive architecture, the complete installed arrangement may include additional components and mechanical structures.

Therefore, it would be misleading to invent a single height, width and depth value without the exact mechanical configuration.

For cabinet manufacturing, lifting, shipping or structural calculations, the complete assembly weight should be used rather than assuming that 14.5 kg represents an entire installed drive system.

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16. Five Same-Series or Closely Related Models

The following models are particularly relevant because they belong to the same PowerFlex 755 high-power DC-input architecture.

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17. Recommended Model 1 — 20G14TD430AN0NNNNN

The 20G14TD430AN0NNNNN is a lower-current member of the same general high-power architecture.

It can be considered when the motor load does not require the full 545 A capacity.

This model is appropriate when the motor current requirement is lower and a 545 A drive would provide unnecessary capacity.

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18. Recommended Model 2 — 20G14TD485AN0NNNNN

The 20G14TD485AN0NNNNN sits between the 430 A and 545 A configurations.

It is useful for applications where the required motor current is higher than the 430 A version but does not require the full 545 A configuration.

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19. Recommended Model 3 — 20G14TD710AN0NNNNN

The 20G14TD710AN0NNNNN provides substantially more current capacity than the target 545 A configuration.

It is more appropriate for larger motor systems or applications with higher continuous-current requirements.

This is a better choice when the motor or mechanical load exceeds the practical capacity of the 545 A configuration.

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20. Recommended Model 4 — 20G14TD740AN0NNNNN

The 20G14TD740AN0NNNNN is another high-capacity member of the same D-class architecture.

It is designed for applications requiring even greater current capability.

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21. Recommended Model 5 — 20G14TD617AN0NNNNN

The 20G14TD617AN0NNNNN is another related PowerFlex 755 configuration that can be considered when comparing nearby high-power current ratings.

This model is useful as a comparison point between the 545 A and higher-current configurations.

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22. Five Popular Models from the Same Brand

For a broader selection, the following models can be considered when comparing products from the same brand.

These models are especially relevant when the goal is to remain within the same high-power drive architecture.

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23. Comparison of the Recommended Models

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24. Typical Industries

The product can be considered in a wide range of heavy industrial environments.

Water and Wastewater

Large pumps, water-transfer equipment, circulation systems and wastewater processing equipment can benefit from adjustable motor speed.

Mining

High-power conveyors, pumps, fans and material-handling systems are typical applications where high current capacity is important.

Cement and Aggregates

Large fans, conveyors, crushers, material-handling systems and process equipment can require high-power motor control.

Steel and Metal Processing

Large production machinery and continuous material-handling systems can require adjustable-speed motors with high torque capability.

Chemical Processing

Pumps, compressors, mixers, blowers and process machinery can benefit from precise variable-speed control.

Manufacturing

Large production lines and heavy machinery can use variable-speed control to improve process flexibility.

Energy and Utilities

Large pumps, fans and auxiliary machinery can use high-power drives for controlled motor operation.

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25. Installation Considerations

Because this is a high-power open-type drive, installation should be treated as an engineering project rather than simply mounting a standalone VFD.

Important considerations include:

Electrical Supply

The DC input system must be compatible with the drive’s voltage and current requirements.

Motor Compatibility

The motor voltage, rated current, frequency, insulation system and duty requirements must be compatible with the drive.

Grounding

A suitable grounding arrangement is essential for safety and electrical-noise control.

Cooling

The cabinet and surrounding equipment must provide adequate heat removal.

Cable Routing

Power cables and control cables should be arranged to reduce unwanted electrical interference.

Maintenance Access

Adequate access should be provided for inspection, service and replacement.

Cabinet Construction

Because the unit is open type, the final enclosure must provide the necessary environmental and personnel protection.

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26. Product Selection Checklist

Before selecting the 20G14TD545AN0NNNNN for a new application or replacing an existing unit, the following information should be checked.

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27. Overall Advantages

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28. Final Assessment

The 20G14TD545AN0NNNNN is a high-power PowerFlex 755 AC packaged drive intended for large industrial motor applications.

Its defining specifications are the 545 A current rating, 650 VDC power class, 480 VAC system class, approximately 450 HP / 335 kW Normal Duty capacity, 350 HP Heavy Duty capacity, DC input with precharge, air cooling, open-type IP00 construction, EMC filtering, CM jumper removed, no internal transistor, and no HIM.

The product is particularly well suited to large pumps, fans, compressors, conveyors, process equipment, material-handling machinery and other applications where the motor needs to operate at controlled and adjustable speeds.

For a lower-current application, the 20G14TD430AN0NNNNN or 20G14TD485AN0NNNNN may be more appropriate. Where additional capacity is required, the 20G14TD617AN0NNNNN, 20G14TD710AN0NNNNN, or 20G14TD740AN0NNNNN can be considered.

From a mechanical standpoint, the important point is that the listed weight is approximately 14.5 kg, while the exact height, width and depth are configuration-dependent. For cabinet manufacturing or replacement work, the final mechanical arrangement should therefore be checked before fabrication rather than relying on an assumed universal dimension.

The 20G14TD545AN0NNNNN is best regarded as a high-capacity industrial drive for applications where motor power, current capacity, controlled speed, reliable acceleration and integration into a larger industrial control system are more important than compact size or simple standalone installation.