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20G11LD960AN0NNNNN — Detailed Product Overview, Technical Parameters, Applications, Advantages and Related Models

The 20G11LD960AN0NNNNN is a high-power, air-cooled AC drive from the PowerFlex 755 series. It is designed for large industrial motors and demanding variable-speed applications where high current capacity, controlled acceleration, process control and industrial automation are required.

This model is a 480 VAC, three-phase, 960 A drive in a Frame 9 package. It uses an 800 mm-deep MCC-style Type 1 / IP20 enclosure and forced-air cooling. The specified configuration includes an EMC filter, AC input with precharge, and no dynamic braking.

The model is particularly suitable for large conveyors, pumps, fans, blowers, material-handling systems, mining equipment, cement machinery and other heavy industrial installations.

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1. Basic Product Information

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2. Product Introduction

The 20G11LD960AN0NNNNN is positioned at the high-power end of the PowerFlex 755 drive range.

Its 960 A output rating makes it suitable for very large motors and machines. Compared with smaller drives in the same family, this model is intended for applications where motor current is substantial and the drive itself becomes a major part of the plant’s power-control system.

The drive provides variable-frequency motor control, allowing the speed of an AC motor to be adjusted according to the requirements of the machine or process.

Instead of operating a large motor continuously at a fixed speed, the drive can regulate motor speed and acceleration. This can make a significant difference in applications such as pumps, fans and conveyors where the required operating point changes during production.

The Frame 9 construction and large MCC-style enclosure also reflect its intended use. This is not a small cabinet-mounted inverter intended for individual machines. It is a large industrial drive normally installed in an electrical room, motor-control area or other suitably controlled environment.

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3. Product Series

The product belongs to the:

PowerFlex 755 Series

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

The family covers a broad range of motor sizes and current ratings, allowing engineers to select different frame sizes and configurations while maintaining a consistent drive platform.

This is particularly useful for plants with multiple large motors because similar drive architecture can be used across different machines.

Typical applications include:

• Large conveyors
• Pumps
• Fans
• Blowers
• Mining equipment
• Cement machinery
• Material handling
• Process equipment
• Industrial production lines
• High-inertia machinery

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4. Main Electrical Parameters

The 960 A current rating is one of the most important selection parameters.

For a real installation, the motor’s rated current should be compared directly with the drive’s applicable current rating. Horsepower alone should not be used as the only selection criterion.

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5. 960 A Output Capacity

The 960 A output rating places this model in the large-drive category.

A drive of this size is normally selected for substantial motors rather than small or medium-sized machines.

The high current capacity makes the model suitable for applications involving:

• Large industrial motors
• High-power pumps
• Large ventilation fans
• Large conveyors
• Heavy material handling
• Process machinery
• Mining equipment
• Cement equipment
• High-inertia rotating equipment

The actual motor selection must still be checked against voltage, current, duty, overload requirements, speed range and application characteristics.

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6. Light-Duty Configuration

The LD designation identifies a Light-Duty configuration.

This is important because drive capacity cannot simply be judged by looking at the maximum horsepower number.

A motor operating a relatively smooth centrifugal load can have very different requirements from a motor driving a crusher, loaded conveyor or other machine with substantial starting torque.

Therefore, before replacing another drive with this model, the following should be checked:

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7. Product Dimensions

The specified model uses an 800 mm-deep MCC-style enclosure.

Because this is a large packaged drive, its complete mechanical dimensions should not be treated in the same way as those of a compact standalone VFD.

The 800 mm depth should be taken into account when planning cabinet layout, electrical-room space and maintenance access.

For a final mechanical installation, the actual dimensional drawing for the particular packaged configuration should be used rather than relying on a generic Frame 9 dimension.

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8. Weight

The complete weight of a large packaged drive depends on the exact cabinet and internal configuration.

For this reason, it is safer to specify the weight as configuration-dependent rather than insert an estimated figure.

For transportation and installation, the final kg value should be taken from the actual equipment documentation or nameplate.

This is especially important for Frame 9 equipment because lifting, floor loading and transportation arrangements can be significant engineering considerations.

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9. Enclosure and Protection

The model uses a:

Type 1 / IP20 / 800 mm Deep MCC Style

enclosure.

This is intended for installation in an appropriate indoor industrial environment.

The enclosure should be protected against direct exposure to:

• Rain
• Water spray
• Condensation
• Excessive moisture
• Conductive dust
• Corrosive contamination
• Other unsuitable environmental conditions

The electrical room should provide suitable ventilation and temperature control.

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10. Forced-Air Cooling

The drive uses forced-air cooling.

At 960 A, the drive can produce considerable heat during operation.

The cooling system therefore becomes an important part of overall reliability.

Regular attention should be given to:

• Cooling fans
• Airflow
• Air inlet conditions
• Cabinet ventilation
• Ambient temperature
• Dust accumulation
• Air outlet clearance

A high-power drive should not be installed in a location where airflow is restricted.

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11. EMC Filter

The specified configuration includes an EMC filter.

This can be useful in industrial installations where electromagnetic compatibility needs to be managed carefully.

A variable-frequency drive produces high-frequency switching activity, so the complete installation should be considered as a system.

Important installation practices include:

• Proper grounding
• Correct motor cable selection
• Appropriate cable routing
• Separation of power and control cables
• Proper shielding practices
• Correct termination
• Proper installation of communication cables

The drive itself is only one part of the overall EMC design.

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12. AC Input with Precharge

The model uses an AC input with precharge configuration.

The input section is therefore an important part of the overall power system.

The installation should consider:

• Incoming supply
• Protection
• Precharge
• Grounding
• Power distribution
• Cable sizing
• Disconnecting equipment
• Maintenance access

For a 960 A drive, the incoming electrical infrastructure should be designed accordingly.

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13. Dynamic Braking

This particular configuration has:

Dynamic Braking: None

This is an important point when considering the application.

A machine with a large rotating mass may require substantial braking energy when the speed is reduced.

Potential examples include:

• Large conveyors
• Large rollers
• Winders
• Unwinders
• Centrifugal machinery
• High-inertia fans
• Large rotating process equipment

If rapid stopping is required, the braking strategy should be evaluated separately.

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14. Operator Interface

The AN0NNNNN configuration specified here has a blank / no HIM arrangement.

That means the drive is not being specified with the enhanced local full-numeric HIM found on some other configurations.

For a plant where local operator interaction is important, the overall system design should therefore consider how commissioning, parameter adjustment and diagnostics will be performed.

Possible approaches can include:

• Network-based configuration
• External interface equipment
• Engineering workstation
• Appropriate control-system integration

This configuration can therefore be particularly attractive when the drive is intended to be integrated into a larger automation architecture rather than operated primarily from the front panel.

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15. Product Applications

15.1 Large Conveyor Systems

Large conveyors are one of the most natural applications for a drive of this size.

Conveyor systems can involve:

• High motor power
• High starting torque
• Significant inertia
• Long operating periods
• Variable production rates

Variable-speed control can provide smoother starting and better control of material movement.

Potential industries include:

• Mining
• Cement
• Aggregate
• Ports
• Bulk material handling
• Steel
• Manufacturing

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15.2 Mining Equipment

Large mining operations require powerful motor-control systems.

Potential applications include:

• Ore conveyors
• Material transfer systems
• Dewatering pumps
• Ventilation fans
• Processing machinery
• Bulk handling equipment

The 960 A capacity makes this class of drive suitable for large motor installations where electrical and mechanical requirements are substantial.

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15.3 Cement Plants

Cement production involves many large motors.

Possible applications include:

• Large process fans
• Raw-material conveyors
• Cement conveyors
• Blowers
• Pumps
• Material-handling systems
• Dust extraction equipment

Variable-speed operation can provide better process control and can reduce unnecessary operation at full motor speed.

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15.4 Aggregate Plants

Aggregate facilities frequently use large motors for:

• Conveyors
• Feeders
• Screens
• Crushers
• Pumps
• Fans

The actual drive duty should be checked carefully, particularly for equipment with severe starting loads.

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15.5 Large Pumps

Large pumps can benefit significantly from variable-speed operation.

Instead of controlling flow only through mechanical restrictions, motor speed can be adjusted to match process demand.

Potential benefits include:

• Better flow control
• Pressure control
• Smooth starting
• Reduced mechanical stress
• Better process response
• Potential energy savings

The greatest energy-saving opportunities are generally associated with variable-flow centrifugal systems.

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15.6 Large Fans and Blowers

Fans and blowers are another major application area.

Typical installations include:

• Industrial ventilation
• Furnace systems
• Mine ventilation
• Process exhaust
• Dust collection
• Cooling systems
• Combustion-air systems

The drive can adjust fan speed to suit changing process requirements.

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16. Product Advantages

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17. Energy and Process Advantages

The biggest practical benefit of a variable-frequency drive is not simply motor starting.

It can allow the motor to operate closer to the actual process requirement.

For example, a pump that does not need full flow does not necessarily need to operate continuously at full speed.

Likewise, a ventilation fan may need different airflow rates depending on production conditions.

By adjusting speed, the drive can help the machine operate more efficiently and with better process control.

Potential benefits include:

• Reduced unnecessary motor speed
• Better flow control
• Better pressure control
• Reduced mechanical shock
• Smoother acceleration
• Improved process response
• Reduced mechanical wear
• Better automation integration

Actual energy savings depend heavily on the machine and load characteristics.

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18. Advantages for Maintenance

A large industrial drive should be considered as part of the plant’s maintenance strategy.

The drive can help maintenance personnel by providing a structured way to monitor operating conditions and identify abnormal behavior.

Maintenance teams should pay particular attention to:

• Cooling fans
• Airflow
• Electrical connections
• Motor cables
• Grounding
• Cabinet cleanliness
• Network communications
• Fault conditions
• Operating temperature
• Mechanical installation

Keeping the cooling system clean is especially important for a large air-cooled drive.

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19. Technical Parameter Table

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20. Five Same-Series / Closely Related Models

The following are useful related PowerFlex 755 configurations for comparison. The suffix configuration should always be checked carefully before using any model as a direct replacement.

The 20G11LD960AN0NNNNN is the reference model in this table.

For the other models, current and mechanical configuration should be verified against the exact catalog number before treating them as substitutes.

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21. Five Additional Related PowerFlex Models

These models are useful when comparing current capacity around the 960 A range.

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22. Five Popular Related Models from the Same Brand

These models represent different capacity levels, from compact drives for smaller machines to large floor-standing drives for high-power industrial systems.

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23. Application Comparison

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24. Installation Requirements

A 960 A drive should be treated as a major electrical installation.

The following items deserve careful consideration:

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25. Maintenance Recommendations

For a high-power air-cooled drive, maintenance should focus heavily on thermal management and electrical connections.

Cooling

Cooling fans should be checked regularly.

Air passages should remain free from dust and obstruction.

The electrical room should not be allowed to become excessively hot.

Electrical Connections

Power connections should be inspected according to the plant maintenance procedure.

Loose connections can create heat and increase electrical stress.

Motor Cables

Motor cables should be checked for:

• Damage
• Insulation problems
• Poor termination
• Grounding issues
• Excessive heating

Network

If the drive is integrated into an industrial control system, communication status should be monitored.

Unexpected communication failures should be investigated rather than simply reset repeatedly.

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26. Why the 20G11LD960AN0NNNNN Is Attractive for Large Industrial Systems

The main reason to select this model is its combination of very high current capability and a mature industrial variable-speed-drive platform.

The 960 A rating provides substantial capacity for large motors.

The 480 VAC three-phase architecture fits common industrial power systems.

The Frame 9 construction provides a suitable platform for high-power equipment.

The 800 mm MCC-style enclosure is intended for large floor-standing installations.

The forced-air cooling system is appropriate for the thermal requirements of a large drive.

The EMC-filtered configuration is useful where electromagnetic compatibility needs to be considered as part of the installation.

The absence of a local HIM can also make sense in an installation where the drive is intended to be managed primarily through a centralized control and engineering system.

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27. Key Strengths at a Glance

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28. Important Selection Advice

For a 960 A drive, the most important issue is not simply whether the motor has a particular horsepower rating.

The correct procedure is to compare the actual motor nameplate and application requirements with the drive.

A practical selection sequence is:

1. Check motor voltage.

The motor should be appropriate for the drive’s voltage class.

2. Check motor full-load current.

This is one of the most important selection values.

3. Check duty.

Determine whether the machine requires light-duty, normal-duty or heavy-duty operation.

4. Check starting torque.

A conveyor, crusher or other heavy machine can have much greater starting requirements than a centrifugal fan.

5. Check acceleration time.

Large loads may require controlled acceleration over a longer period.

6. Check deceleration time.

If rapid stopping is required, the braking arrangement must be evaluated.

7. Check inertia.

Large rotating masses can significantly affect the drive selection.

8. Check the installation environment.

Temperature, dust, humidity and ventilation all matter.

9. Check cabinet space.

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

10. Check lifting requirements.

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

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29. Final Technical Summary

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30. Overall Product Assessment

The 20G11LD960AN0NNNNN is a high-capacity PowerFlex 755 AC drive intended for large industrial motor systems.

Its 960 A output rating, 480 VAC three-phase architecture, Frame 9 construction, forced-air cooling and 800 mm-deep MCC-style enclosure place it firmly in the large industrial-drive category.

It is particularly appropriate for large conveyors, mining systems, cement plants, aggregate equipment, large pumps, fans, blowers and bulk-material handling machinery.

Its strongest practical advantages are the ability to control very large motors at variable speed, provide controlled motor acceleration, integrate into industrial automation systems and operate as part of a large centralized motor-control installation.

One point that should receive special attention during selection is the absence of dynamic braking. If the driven machine has substantial inertia or requires rapid stopping, the braking requirements should be reviewed separately.

The mechanical side should also be planned carefully. The 800 mm cabinet depth is an important installation dimension, while the exact overall width, height and complete equipment weight in kg should be taken from the specific mechanical configuration rather than estimated.

For replacement work, the catalog number should be matched character-for-character. A model with the same PowerFlex family and a similar current rating is not automatically a direct replacement, because suffixes can change the enclosure, interface, input configuration, braking arrangement and other important characteristics.