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20G11LD960AN2NNNNN — Detailed Product Introduction, Technical Parameters, Applications, Advantages and Related Models

The 20G11LD960AN2NNNNN is a high-capacity AC variable-frequency drive belonging to the PowerFlex 755 series. It is designed for large industrial motor applications where high output current, stable speed control, controlled acceleration and integration with an automation system are required.

This model is a 480 VAC, three-phase, 960 A, Frame 9, air-cooled AC drive. It uses an 800 mm deep MCC-style enclosure with Type 1 / IP20 protection. The configuration includes an EMC filter, AC input with precharge/DC terminals, no dynamic-braking transistor, embedded EtherNet/IP communication and an Enhanced LCD full-numeric local operator interface.

Because this is a large-frame industrial drive, it is normally associated with substantial equipment rather than small standalone machines. Typical applications include large conveyors, pumps, fans, blowers, mining equipment, cement equipment, aggregate handling systems and other large motor-driven process machinery.

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1. Basic Product Information

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2. Product Introduction

The 20G11LD960AN2NNNNN is a large industrial AC drive intended to control high-power three-phase motors.

Its primary purpose is to convert incoming AC electrical power into controlled variable-frequency output power for an AC motor. By adjusting the output frequency and voltage, the drive can regulate motor speed and provide controlled starting and stopping.

For large industrial equipment, this is particularly important because directly starting a large motor can create significant electrical and mechanical stress.

With variable-speed control, the motor can be accelerated progressively instead of being forced immediately from zero speed to operating speed.

This can help reduce mechanical shock on:

• Gearboxes
• Couplings
• Shafts
• Bearings
• Conveyor structures
• Pumps
• Fans
• Belts
• Process machinery

The 960 A output rating makes this model suitable for very large motor applications where smaller drives would not provide sufficient current capacity.

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3. Product Series

The product belongs to the:

PowerFlex 755 Series

The PowerFlex 755 series is designed for higher-performance industrial motor-control applications.

It is intended for systems where the drive may need to perform more than basic speed regulation.

Depending on configuration and system design, the platform can support functions associated with:

• Speed control
• Torque control
• Motor acceleration
• Motor deceleration
• Process control
• Network control
• Drive diagnostics
• Feedback systems
• Industrial communication
• Automation integration
• Advanced motor-control strategies

The series is suitable for applications ranging from medium industrial machinery to very large motor systems.

The 20G11LD960AN2NNNNN is positioned toward the high-current end of the family.

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4. Main Electrical Parameters

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5. 960 A Output Capacity

The 960 A output rating is the most important electrical characteristic of this model.

This is a high-current industrial drive and is intended for large motors.

The actual motor selection should not be based on horsepower alone.

A proper selection should consider:

• Motor rated voltage
• Motor full-load current
• Motor power
• Load type
• Starting torque
• Acceleration time
• Deceleration time
• Overload requirements
• Motor inertia
• Braking requirements
• Ambient temperature
• Installation altitude
• Duty cycle

A 960 A drive can be suitable for a very large motor, but the exact motor rating depends on the application duty.

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6. Light-Duty, Normal-Duty and Heavy-Duty Ratings

The model can be considered across different load-duty classifications.

This distinction is very important.

A centrifugal fan, for example, may have relatively predictable acceleration characteristics.

A large loaded conveyor can require much more starting torque.

A crusher or other heavy mechanical machine can impose even more severe starting and overload conditions.

Therefore, the 700 HP Heavy-Duty rating should be considered where the application has significant overload or starting requirements.

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7. 480 VAC Three-Phase Input

The drive is designed for a 480 VAC three-phase industrial power system.

This voltage class is widely associated with large industrial electrical installations.

Because the drive has a 960 A output rating, the incoming power system must be designed accordingly.

Important electrical considerations include:

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8. Embedded EtherNet/IP Communication

The 20G11LD960AN2NNNNN includes embedded EtherNet/IP communication.

This allows the drive to be integrated into a larger industrial control system.

Instead of requiring every control function to be hardwired directly to the drive, the drive can communicate operating information and control commands through the industrial network.

Typical functions can include:

• Start command
• Stop command
• Speed reference
• Direction command
• Drive status
• Fault status
• Warning information
• Operating speed
• Current information
• Parameter-related information
• Remote diagnostics

This is particularly useful in large production plants where multiple motors are controlled from a centralized automation system.

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9. Enhanced LCD Full-Numeric HIM

The AN2 configuration includes an Enhanced LCD full-numeric Human Interface Module.

The local interface is particularly useful during:

• Commissioning
• Parameter adjustment
• Maintenance
• Troubleshooting
• Local testing
• Fault diagnosis
• Drive monitoring

A technician can work directly with the drive at the cabinet instead of relying entirely on a remote control station.

For large industrial machinery, this can be a practical advantage.

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10. Air-Cooled Construction

The drive uses an air-cooled design.

At a 960 A output rating, the drive can generate significant heat during operation.

Therefore, the cooling system is an important part of the overall installation.

The electrical room or equipment area should provide:

• Adequate ventilation
• Suitable ambient temperature
• Sufficient airflow
• Clean air passages
• Appropriate cabinet clearance

Cooling fans and air passages should also be included in the maintenance plan.

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11. EMC Filter

The configuration includes an EMC filter.

This helps address electromagnetic compatibility requirements associated with variable-frequency-drive installations.

A proper installation should also pay attention to:

• Grounding
• Shielding
• Motor cable selection
• Cable routing
• Control-cable separation
• Communication-cable installation
• Correct termination

The EMC filter is part of the overall EMC solution, but correct installation practices remain important.

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12. Dynamic Braking

The specified configuration does not include a dynamic-braking transistor.

This does not mean that the drive cannot decelerate a motor.

It means that applications requiring significant regenerative or braking-energy management need to be evaluated carefully.

This becomes particularly important with:

• Large conveyors
• High-inertia fans
• Large rollers
• Winders
• Unwinders
• High-speed rotating machinery
• Heavy rotating loads

If the machine must stop rapidly, the braking system should be designed according to the actual mechanical energy involved.

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13. Enclosure

The model uses a:

Type 1 / IP20 / 800 mm Deep MCC-Style Enclosure

This is a large floor-standing cabinet arrangement.

It is intended for an appropriate industrial environment rather than direct outdoor exposure.

The installation area should be protected from:

• Rain
• Direct water
• Excessive moisture
• Condensation
• Conductive dust
• Corrosive contamination
• Excessive temperature

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14. Dimensions

The most clearly defined mechanical dimension for this configuration is the 800 mm cabinet depth.

The exact overall height and width can depend on the packaged configuration.

For cabinet fabrication, transportation planning and final installation, the dimensions of the actual supplied unit should be used.

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15. Weight

The complete equipment weight should be treated as configuration dependent.

This is preferable to using an unsupported approximate value for a large Frame 9 packaged drive.

For large equipment, the final weight in kg should be confirmed before arranging lifting equipment or transportation.

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16. Typical Product Applications

16.1 Large Conveyors

Large conveyor systems are a major application for high-current AC drives.

The drive can provide controlled acceleration rather than applying full motor power immediately.

This can reduce mechanical shock and provide smoother material movement.

Typical applications include:

• Mining conveyors
• Cement conveyors
• Aggregate conveyors
• Bulk-material conveyors
• Port handling systems
• Industrial production conveyors

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16.2 Mining Equipment

Mining operations frequently use large electric motors.

Potential applications include:

• Ore conveyors
• Material-transfer systems
• Large ventilation fans
• Dewatering pumps
• Processing equipment
• Bulk handling machinery

The high-current capability makes this class of drive suitable for large mining motors.

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16.3 Cement Equipment

Large cement plants have many high-power motors.

Potential applications include:

• Large fans
• Conveyors
• Blowers
• Pumps
• Material-handling systems
• Dust extraction
• Process equipment

Variable-speed control can help match motor speed to actual production requirements.

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16.4 Aggregate Processing

Aggregate plants use large motors for:

• Conveyors
• Feeders
• Screens
• Pumps
• Fans
• Material handling

For particularly demanding loads, the heavy-duty rating and starting requirements must be considered carefully.

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16.5 Large Pumps

Large pumps are another strong application.

Variable-speed control can be used to regulate:

• Flow
• Pressure
• Process demand
• Starting speed
• Operating speed

For centrifugal pumps, operating at reduced speed can sometimes provide significant energy savings.

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16.6 Large Fans and Blowers

The drive can also be used for large ventilation and process-air systems.

Typical applications include:

• Industrial ventilation
• Mine ventilation
• Furnace air
• Process exhaust
• Dust extraction
• Cooling systems
• Large blowers

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17. Product Advantages

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18. Energy-Saving Potential

The drive can provide energy-saving opportunities, particularly in variable-torque applications.

Large centrifugal pumps and fans are common examples.

When process requirements are reduced, operating the motor at a lower speed can be more efficient than keeping the motor at full speed and restricting the process mechanically.

Potential benefits include:

• Reduced motor speed
• Reduced unnecessary power consumption
• Better flow control
• Better pressure control
• Improved process regulation
• Reduced mechanical stress

Actual energy savings depend on the load characteristics and operating profile.

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19. Mechanical Advantages

Controlled motor acceleration can reduce mechanical shock.

This can be valuable for:

• Gearboxes
• Couplings
• Shafts
• Bearings
• Conveyor belts
• Pump assemblies
• Fan assemblies

A smoother acceleration profile can reduce sudden torque transfer through the mechanical system.

This may contribute to longer service intervals and improved equipment operating stability.

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20. Automation Advantages

The embedded communication capability makes the drive suitable for larger automation systems.

A plant can potentially use a centralized controller to coordinate multiple drives.

Typical functions include:

• Centralized speed control
• Remote start/stop
• Fault monitoring
• Process interlocking
• Drive status monitoring
• Production coordination
• Remote diagnostics

This can be especially useful where the drive is located in a dedicated electrical room away from the machine operator.

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21. Maintenance Advantages

The local HIM can simplify maintenance.

A technician can check drive information directly at the cabinet.

Useful maintenance activities include:

• Reading fault information
• Checking operating parameters
• Monitoring current
• Checking speed
• Reviewing warnings
• Adjusting parameters
• Testing local operation

The cooling system should also be maintained carefully.

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22. Recommended Maintenance Points

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23. Five Same-Series / Closely Related Models

The following models are useful for comparison when selecting other large PowerFlex 755 configurations.

These should be regarded as related catalog configurations, not automatic drop-in replacements.

The suffix of each catalog number can affect the drive configuration, operator interface and other options.

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24. Five More Related Models

When selecting among these models, current rating should be compared with the motor’s actual full-load current and the required application duty.

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25. Five Popular Models from the Same Brand

For a broader product comparison, the following models represent different capacity levels within the same brand’s drive portfolio.

These products span a very broad range of motor-control applications, from small machinery to large industrial systems.

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26. Application Suitability Comparison

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27. Detailed Mechanical Parameter Table

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28. Detailed Electrical Parameter Table

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29. Product Selection Advantages

When compared with a smaller drive, the major advantage of the 20G11LD960AN2NNNNN is its very large current capacity.

When compared with a basic fixed-speed motor starter, its main advantage is the ability to control motor speed and acceleration.

When compared with a drive without network communication, the embedded EtherNet/IP capability provides a more convenient path for integration into a modern industrial control architecture.

When compared with a configuration without a local operator interface, the Enhanced LCD HIM provides additional convenience during commissioning and maintenance.

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30. Important Selection Considerations

Before selecting this model for a particular machine, the following information should be checked.

Motor Voltage

The motor voltage must be compatible with the drive.

Motor Current

The motor’s full-load current is one of the most important selection values.

Duty

Determine whether the application is light-duty, normal-duty or heavy-duty.

Starting Torque

A heavily loaded conveyor requires a different starting profile from a centrifugal fan.

Acceleration

Large mechanical loads may require controlled acceleration.

Deceleration

The stopping requirement must be evaluated.

Inertia

Large rotating masses can create significant regenerative energy during deceleration.

Braking

This configuration does not include a dynamic-braking transistor, so braking requirements should be reviewed carefully.

Environment

The IP20 / Type 1 enclosure requires an appropriate installation environment.

Cabinet Space

The 800 mm cabinet depth should be incorporated into the electrical-room design.

Weight

The final equipment weight in kg should be confirmed before transportation and installation.

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31. Overall Technical Summary

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32. Final Product Assessment

The 20G11LD960AN2NNNNN is a high-capacity industrial variable-frequency drive designed for large motor-control applications.

Its 960 A output capability makes it suitable for substantial industrial motors, while the 480 VAC three-phase architecture fits large industrial electrical systems.

The PowerFlex 755 platform provides a broad industrial control environment, while the embedded EtherNet/IP capability allows the drive to be integrated into a larger automation system.

The Enhanced LCD full-numeric HIM is an important advantage of this particular configuration because it provides local access for commissioning, parameter adjustment, monitoring and troubleshooting.

The 800 mm-deep MCC-style Frame 9 enclosure makes this a floor-standing industrial product rather than a compact machine-mounted drive. Adequate cabinet space, ventilation, maintenance clearance and lifting arrangements should therefore be planned before installation.

The model is particularly well suited to:

• Large conveyors
• Mining machinery
• Cement equipment
• Aggregate handling
• Large pumps
• Large fans
• Large blowers
• Bulk-material systems
• Industrial ventilation
• Large process machinery

The main technical points to pay attention to are the 960 A current rating, duty classification, 480 VAC supply, 800 mm cabinet depth, absence of dynamic braking, cooling requirements and the actual equipment weight in kg.

For a replacement project, the complete catalog number should always be compared character by character. Similar-looking PowerFlex catalog numbers can have different interfaces, input arrangements, braking configurations and other options, so a model with the same current rating should not automatically be treated as a direct replacement.