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20G11BF650AN2NNNNN — Detailed Product Information, Technical Parameters, Applications, Advantages and Related Models

1. Product Overview

The 20G11BF650AN2NNNNN is a high-power PowerFlex 755 AC Drive designed for large industrial motor-control applications.

It belongs to the PowerFlex 755 series within the broader PowerFlex 750-Series family. The unit is an air-cooled, three-phase industrial AC drive intended for high-power motors and demanding variable-speed applications.

The drive is configured for a 690 VAC class power system and has a 650 A current rating. With its large Frame 9 construction and MCC-style enclosure arrangement, it is intended for industrial electrical rooms, motor-control centers and large machine installations rather than small standalone machinery.

The product is particularly suitable for large conveyors, pumps, fans, blowers, compressors, material-handling equipment, mining machinery, cement plants, steel-related equipment, water-processing systems and other applications where large AC motors require controlled speed and torque.

The exact model configuration is important because the AN2 designation identifies a particular filtering and common-mode capacitor arrangement. Therefore, this model should not be considered interchangeable with every other 650 A drive simply because the voltage and current are the same.

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2. Brand and Series

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3. Main Technical Parameters

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4. Dimensions and Weight

The physical size of this drive is substantially larger than that of conventional small and medium-power frequency converters.

For the Frame 9 MCC-style configuration, the commonly used engineering reference values are approximately:

The 1246 kg figure should be understood as an approximate equipment reference value rather than a universal shipping weight.

The final physical dimensions and mass can vary depending on the complete cabinet arrangement, options, accessories and project-specific configuration.

For transportation, lifting, foundation loading and installation planning, the final mechanical drawing for the actual unit should always be used.

Because the unit is approximately 1.2 tonnes, transportation and installation need to be planned in advance. Floor loading, lifting points, access routes, door dimensions and maintenance clearance all become important considerations.

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5. Electrical Ratings

The 20G11BF650AN2NNNNN is designed for a 690 VAC three-phase electrical system.

Its rated current is 650 A, placing it in the high-power industrial drive category.

The principal power ratings can be summarized as follows:

The distinction between normal-duty and heavy-duty ratings is important when selecting the drive.

A motor with a nominal rating close to 500 kW does not automatically mean that every 500 kW motor application can use the same drive configuration. The actual motor current, overload requirements, starting torque, acceleration time, load inertia and operating cycle must also be evaluated.

For a high-inertia conveyor, crusher or compressor, the required overload capability can be much more demanding than that of a centrifugal fan or pump.

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6. Product Configuration

The catalog number 20G11BF650AN2NNNNN represents a specific drive configuration rather than merely identifying the basic drive family.

The most important characteristics are:

The AN2 portion of the model is especially relevant during replacement.

A replacement drive with the same voltage and current but a different suffix may have different filtering, common-mode capacitor or electrical configuration characteristics.

Therefore, when replacing an existing unit, the complete catalog number should be compared rather than checking only the current rating.

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7. Product Introduction

The PowerFlex 755 is an industrial AC drive platform designed for large motors and sophisticated motor-control applications.

The 20G11BF650AN2NNNNN represents a high-capacity Frame 9 configuration intended to control motors in the hundreds-of-kilowatts range.

The fundamental purpose of the drive is to convert the incoming electrical power into a controlled variable-frequency output for the motor.

Instead of operating a large motor continuously at a fixed electrical frequency, the drive can regulate motor speed according to the requirements of the machine or process.

This makes the drive particularly useful when the motor must:

• Start smoothly.
• Accelerate under controlled conditions.
• Decelerate in a controlled manner.
• Operate at different speeds.
• Follow changing process requirements.
• Coordinate with other machinery.
• Provide controlled torque.
• Be integrated into an industrial automation system.

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8. How the Product Works in an Industrial System

A simplified system can be represented as:

Industrial Power Supply → AC Drive → Large AC Motor → Mechanical Load

The drive receives the incoming three-phase electrical supply and controls the electrical output delivered to the motor.

The motor can then operate at a speed determined by the drive command rather than being limited to the fixed frequency of the incoming electrical supply.

For an automated production line, the arrangement can become:

PLC / Controller → Industrial Control Network → PowerFlex 755 → Motor

This allows motor operation to become part of the larger production process.

For example, a conveyor can change speed according to production demand, a pump can adjust speed according to pressure or flow requirements, and a fan can vary its speed according to airflow requirements.

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9. Main Product Applications

9.1 Large Conveyor Systems

Large conveyors are one of the most suitable applications for this type of drive.

A heavily loaded conveyor can have substantial rotating mass and mechanical inertia.

Starting such a system directly can result in high mechanical stress on:

• Gearboxes.
• Couplings.
• Conveyor belts.
• Shafts.
• Bearings.
• Motor components.

Variable-speed control allows acceleration to be managed more gradually.

The conveyor can also operate at different speeds depending on the required production rate.

Typical applications include:

• Mining conveyors.
• Aggregate handling.
• Cement plants.
• Port facilities.
• Bulk-material handling.
• Steel plants.
• Large manufacturing systems.

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10. Mining Applications

Mining equipment often requires very large motors.

The drive can be applied to equipment such as:

• Long-distance conveyors.
• Material-handling systems.
• Large ventilation fans.
• Process pumps.
• Crushers and auxiliary machinery.
• Ore-handling systems.

The high current and 690 VAC architecture are particularly suitable for large industrial electrical systems.

For mining applications, however, the environmental conditions must be evaluated carefully. Dust, ambient temperature, vibration and installation location can have a significant effect on equipment reliability.

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11. Pump Applications

Large industrial pumps are another major application.

Many pumping systems do not require the pump to operate continuously at maximum speed.

A variable-speed drive can allow the pump motor to operate according to process demand.

Potential applications include:

• Water treatment.
• Wastewater treatment.
• Cooling-water circulation.
• Process-water systems.
• Industrial pumping stations.
• Chemical processing.
• Large utility systems.

For variable-flow applications, speed control can also provide an opportunity to reduce energy consumption.

The actual energy benefit depends on the pump characteristics and process requirements and should be calculated from the real operating profile.

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12. Fan and Blower Applications

Large fans and blowers can also benefit from variable-speed control.

Typical applications include:

• Furnace ventilation.
• Industrial ventilation.
• Dust collection.
• Combustion air.
• Process exhaust.
• Cement production.
• Steel production.
• Cooling systems.
• Large HVAC systems.

Instead of operating the fan continuously at maximum speed, the drive can adjust the motor speed according to the required airflow.

This can improve process control and, in suitable variable-torque applications, reduce unnecessary energy consumption.

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13. Compressor Applications

Large compressors can have substantial starting torque and inertia.

The drive can provide controlled acceleration and speed regulation, helping the compressor integrate into a larger process-control system.

Possible applications include:

• Industrial compressed-air systems.
• Process-gas systems.
• Large production facilities.
• Utility systems.
• Industrial process equipment.

Compressor applications should be evaluated carefully because the exact starting and torque requirements depend heavily on the compressor type.

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14. Cement and Aggregate Industry

Cement and aggregate plants contain many large motors.

Common drive applications include:

• Large fans.
• Conveyors.
• Pumps.
• Crushers.
• Material-handling systems.
• Process auxiliaries.

The high-power capacity of the 20G11BF650AN2NNNNN makes it appropriate for large equipment where a conventional low-power drive would be insufficient.

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15. Water and Wastewater Applications

Large water-processing systems often contain numerous high-power pumps and blowers.

Variable-speed control can be useful where flow demand changes during the day or throughout the production cycle.

Applications can include:

• Raw-water pumping.
• Process-water pumping.
• Wastewater pumping.
• Aeration blowers.
• Cooling-water circulation.
• Industrial wastewater treatment.

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16. Main Advantages

16.1 High Current Capacity

The 650 A current rating is one of the most important characteristics of this model.

It places the drive in a completely different class from small and medium-power variable-frequency drives.

This capacity allows the drive to serve large industrial motors and substantial mechanical loads.

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16.2 690 VAC High-Power Architecture

The 690 VAC design is suitable for high-power industrial motor systems.

For large motor installations, higher system voltage can help reduce current compared with lower-voltage systems for an equivalent power level.

This can be beneficial when designing large electrical distribution systems.

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16.3 Large Normal-Duty Power Rating

The approximately 630 kW normal-duty capacity makes the unit suitable for very large industrial motors.

This is especially useful for applications where the motor operates continuously but still requires controlled speed and process regulation.

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16.4 Strong Heavy-Duty Capability

The approximately 500 kW heavy-duty class is useful for applications involving higher overload demand.

Heavy-duty applications can include equipment with:

• High starting torque.
• Large inertia.
• Frequent acceleration.
• Frequent deceleration.
• Variable loading.
• Difficult starting conditions.

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16.5 Air-Cooled Construction

Air cooling avoids the need for a dedicated liquid-cooling system.

For industrial facilities that already have appropriate electrical-room ventilation, this can simplify the overall installation.

The cooling airflow still needs to be maintained properly.

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16.6 MCC-Style Installation

The MCC-style cabinet arrangement is appropriate for centralized industrial electrical rooms.

It provides a more practical arrangement for high-power equipment than trying to install a drive of this capacity as a compact wall-mounted device.

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16.7 EMC Filtering

The model includes an EMC-filter configuration.

This can be advantageous in industrial environments where electromagnetic compatibility is important.

The filtering arrangement should nevertheless be considered together with:

• Grounding.
• Motor cable length.
• Cable shielding.
• Motor insulation.
• Other electrical equipment.
• Plant EMC requirements.

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17. Advantages for Automation

A major advantage of the PowerFlex 755 architecture is its ability to operate as part of an industrial automation system.

A large motor can be controlled through the plant’s automation architecture rather than being operated as an isolated motor.

A typical system may include:

This architecture is particularly valuable in large factories because many motors can be coordinated as part of one production process.

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18. Advantages for Maintenance

A sophisticated industrial drive can make maintenance more systematic.

Typical information available to a properly configured control system can include:

• Drive running status.
• Drive fault status.
• Warning status.
• Motor speed.
• Current.
• Reference speed.
• Operating state.
• Communication status.
• Parameter information.
• Diagnostic information.

This is valuable for large production equipment because a motor drive fault can stop a substantial section of a production line.

Better diagnostic information can help maintenance personnel identify whether the problem is associated with the motor, drive, communication system, power supply or mechanical load.

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19. Advantages for Process Control

The drive provides the ability to match motor operation to process requirements.

For example:

This flexibility can be more valuable than simply reducing motor energy consumption.

In many industrial applications, the primary reason for installing a variable-speed drive is improved process control.

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20. Installation Considerations

Because this is a very large Frame 9 drive, installation needs considerably more planning than a conventional small VFD.

Electrical Requirements

The electrical system must be appropriate for:

• 690 VAC.
• Three-phase operation.
• High current.
• High-power motor operation.
• Appropriate upstream protection.
• Proper grounding.
• Correct cable selection.
• Appropriate short-circuit protection.

The entire electrical system should be evaluated as one coordinated installation.

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Mechanical Requirements

The approximate physical size is:

2453 mm H × 1200 mm W × 800 mm D

The approximate weight is:

1246 kg

This means that the installation area must be capable of supporting the equipment and providing adequate access.

Transportation routes should be checked before delivery.

Particular attention should be paid to:

• Door width.
• Door height.
• Floor loading.
• Lifting equipment.
• Forklift or crane access.
• Maintenance clearance.
• Cabinet door movement.
• Cable-entry space.

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21. Cooling and Environmental Considerations

Air-cooled equipment depends on adequate airflow.

The installation should provide suitable environmental conditions.

Important factors include:

High-power drives produce significant heat.

A drive installed in a poorly ventilated electrical room may experience thermal stress even when the electrical load itself is within the rated range.

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22. Maintenance Recommendations

For a high-power drive, preventive maintenance is particularly important.

A small cooling problem can eventually cause an unexpected shutdown of a large motor and potentially stop an entire production process.

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23. Five Recommended Models from the Same Series or Closely Related Family

The following models are useful comparison candidates within the same PowerFlex 755 high-power range.

These models should be considered selection candidates, not automatic drop-in replacements.

The suffix configuration should always be checked before purchasing because filtering, CM configuration, braking and other electrical characteristics can differ.

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24. Closest Replacement Model

The most important related model is:

For replacement purposes, the 20G11BF650JN2NNNNN is the first model that should be evaluated.

However, replacement should include a parameter-by-parameter comparison rather than relying only on the model number.

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25. Five Same-Brand Popular / Useful Models

For a wider comparison, the following high-power models are useful candidates within the same brand’s industrial drive portfolio.

The models above are most relevant when the application requires a large industrial drive and the user wants to remain within the same high-power product platform.

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26. Comparison of the Main Current Classes

The main reason to move from the 650 A class to a larger current class is to obtain additional motor and overload capacity.

Oversizing the drive substantially beyond the motor’s actual requirements is generally unnecessary unless there is a specific engineering reason.

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27. Recommended Model by Application

The final selection should always be based on the actual motor nameplate and load profile.

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28. Important Selection Parameters

When replacing or selecting this drive, the following parameters should be checked.

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29. Advantages and Disadvantages at a Glance

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30. Overall Product Advantages

The 20G11BF650AN2NNNNN has several characteristics that make it particularly appropriate for large industrial applications.

Its 650 A current rating provides substantial motor-driving capability.

Its 690 VAC architecture makes it suitable for high-power industrial motor systems.

Its approximately 630 kW normal-duty rating places it firmly in the large-motor category.

Its Frame 9 air-cooled MCC-style construction allows it to be incorporated into centralized industrial electrical installations.

Its EMC-filter configuration is useful in applications where electromagnetic compatibility must be considered as part of the electrical design.

The PowerFlex 755 platform also provides a suitable foundation for integrating large motors into automated production systems.

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31. Product Limitations

The same characteristics that make the product powerful also create several limitations.

The physical equipment is large.

The approximate dimensions of 2453 mm × 1200 mm × 800 mm require substantial installation space.

The approximate weight of 1246 kg requires professional transportation and lifting arrangements.

The electrical rating of 690 VAC / 650 A requires an appropriately designed electrical system.

The air-cooled construction requires sufficient ventilation.

The product is therefore not an economical or practical choice for small machines.

It is best suited to applications where the motor itself is large enough to justify this level of drive capacity.

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32. Final Technical Summary

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33. Final Recommendation

For an existing installation using 20G11BF650AN2NNNNN, the 20G11BF650JN2NNNNN should be the first replacement model to evaluate because it remains in the same PowerFlex 755 high-power class and preserves the key 650 A / 690 VAC application characteristics.

For applications requiring slightly less capacity, the 590 A class can be considered.

For applications requiring additional capacity, the 710 A, 765 A and 795 A classes provide progressively higher current and power capability.

The most important point is that the model number should be evaluated in its entirety. Voltage, current, duty rating, filtering, CM configuration, braking, enclosure, cooling, communication requirements and mechanical dimensions all matter.

For a large industrial motor, the correct drive is not necessarily the one with the highest kW rating. The best selection is the one that provides sufficient current and overload capacity while matching the motor, mechanical load, operating cycle, electrical system and installation environment.

In practical terms, the 20G11BF650AN2NNNNN is a high-power, 690 VAC, 650 A, Frame 9 industrial AC drive intended primarily for large motors and demanding variable-speed applications. Its strongest application areas are large conveyors, pumps, fans, blowers, compressors, mining equipment, cement equipment, material handling and other heavy industrial machinery.