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20G11LD1K2AN0NNNNN — PowerFlex 755 High-Power AC Drive

Product Parameters, Introduction, Applications, Advantages, Series Information and Recommended Models

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1. Basic Product Information

The 20G11LD1K2AN0NNNNN is a high-power industrial AC variable frequency drive designed for large three-phase motor applications.

It belongs to the PowerFlex 755 family and is configured for 480 VAC industrial power systems. With an output current rating of approximately 1135 A, it is intended for very large motors and demanding industrial machinery.

This model uses an air-cooled Frame 9 construction, with an 800 mm deep MCC-style enclosure. It is designed for floor-standing installation rather than the compact panel-mounted installation normally associated with small variable frequency drives.

The product is particularly suitable for large conveyors, pumps, fans, blowers, mining equipment, material-handling systems, cement equipment, steel-processing machinery and other high-power industrial applications.

The catalog configuration AN0 is associated with the basic configuration without a permanently installed local HIM. This makes the model suitable for systems where operation and monitoring are handled through a PLC, HMI, industrial network or centralized control system.

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2. Brand and Series

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3. Main Technical Specifications

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4. Electrical Rating

The most important electrical characteristic of the 20G11LD1K2AN0NNNNN is its 1135 A output current rating.

This is a very large industrial drive.

The 1135 A current capacity allows the drive to control motors in the several-hundred-kilowatt range and, depending on duty requirements, motors approaching the 1000 HP class.

The three principal duty ratings are:

These ratings should be considered together with the actual motor nameplate current and load profile.

The correct drive selection should be based primarily on motor current, overload requirements, acceleration requirements and actual mechanical load rather than horsepower alone.

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5. What Does the 1135 A Rating Mean?

A drive rated at 1135 A is designed for applications where a conventional small or medium-size VFD would not have sufficient current capacity.

Large industrial motors can draw substantial current during acceleration and during high-load operation.

The high current capability of this model provides additional capacity for large mechanical systems.

Typical equipment can include:

• Large belt conveyors
• Mining conveyors
• Ore-handling systems
• Large process pumps
• Industrial fans
• Large blowers
• Material-transfer equipment
• Cement-processing equipment
• Steel-processing equipment
• Large ventilation systems
• Industrial water systems
• Bulk-material handling machinery

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6. Product Construction

The 20G11LD1K2AN0NNNNN uses a Frame 9 construction.

Frame 9 is intended for large industrial drive systems where substantial electrical components, cooling equipment and power connections must be accommodated.

The drive uses an 800 mm deep MCC-style cabinet.

This means that the product should be treated as a substantial floor-standing electrical assembly rather than as a small electronic drive that can simply be mounted onto a standard control-panel backplate.

The large cabinet provides the necessary physical space for the power section, cooling system, electrical connections and associated control components.

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7. Dimensions and Weight

Because this is a large Frame 9 industrial drive, physical dimensions are an important part of project planning.

For preliminary equipment planning, the following values can be used as approximate figures.

The 800 mm cabinet depth is an important mechanical reference.

The exact overall height, width and shipping weight can vary according to the exact cabinet arrangement, accessories, shipping configuration and installation options.

For foundation calculations, lifting plans, transportation and final enclosure layout, the specific mechanical drawing for the supplied configuration should be used.

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8. Product Introduction

The 20G11LD1K2AN0NNNNN is designed to provide variable-speed control for very large AC motors.

Instead of connecting a large motor directly to the electrical supply and allowing it to accelerate at the maximum available electrical torque, the drive controls the motor’s electrical frequency and voltage.

This allows the motor to accelerate in a controlled manner.

For large industrial machines, controlled acceleration can be extremely valuable.

A large conveyor, for example, can contain a considerable amount of moving material and have significant mechanical inertia.

Starting the entire system suddenly can place substantial stress on belts, gearboxes, shafts, couplings and bearings.

A properly configured variable frequency drive can provide a much smoother acceleration profile.

The same principle applies to large pumps, fans, blowers and other rotating machinery.

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9. PowerFlex 755 Series

The PowerFlex 755 series is intended for sophisticated industrial motor-control applications.

Compared with compact variable frequency drives, the series is designed to provide greater power capability, more advanced control functions and broader system-integration options.

The series can be used in applications where the motor is an important part of a larger automated production process.

Typical system architecture can look like:

PLC / Control System → Industrial Network → Drive → Motor → Mechanical Equipment

This arrangement allows the motor drive to become part of the overall machine-control system rather than operating as an isolated device.

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10. AN0 Configuration

The AN0 configuration is important when identifying the exact version of the product.

This configuration is associated with a drive without a permanently installed local HIM.

That can be advantageous in installations where operators do not need to control the drive directly from the front of the cabinet.

Instead, the drive can be controlled from:

• PLC systems
• HMI panels
• Central control rooms
• SCADA systems
• Industrial Ethernet networks
• Remote operator stations
• Plant-wide automation systems

For large industrial plants, centralized control can be more convenient than requiring operators to access each individual drive.

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11. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication capability.

This provides a practical method of connecting the drive to an industrial automation system.

Typical operating data can include:

This type of communication is particularly valuable in large facilities containing dozens or hundreds of motors.

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12. Applications

12.1 Mining Conveyors

Large mining conveyors are a strong application for this type of drive.

Mining conveyor systems can involve:

• Long conveyor belts
• High material loads
• Large motors
• High inertia
• Frequent starting and stopping
• Long acceleration times

Controlled motor acceleration can reduce mechanical shock.

The drive can also provide useful operating information to the plant control system.

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12.2 Large Material Handling

Material-handling systems often use large motors to transport heavy products or bulk materials.

Potential applications include:

• Bulk material conveyors
• Ore transfer systems
• Coal handling
• Aggregate handling
• Storage and retrieval systems
• Port material handling
• Industrial transfer equipment

The ability to regulate motor speed can help coordinate multiple sections of a material-handling system.

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12.3 Large Pumps

Large pumps are another important application.

Possible applications include:

• Water transfer
• Mine dewatering
• Industrial cooling
• Process water
• Wastewater systems
• Circulation systems
• Large process pumps

Variable-speed control can allow pump output to be adjusted according to process demand.

This can be especially useful for centrifugal pumps.

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12.4 Large Fans

Large industrial fans can require several hundred kilowatts of motor power.

Potential applications include:

• Industrial ventilation
• Furnace ventilation
• Process ventilation
• Exhaust systems
• Dust extraction
• Cooling systems
• Large air-handling equipment

For suitable variable-torque fan applications, speed control can provide an efficient way to adjust airflow.

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12.5 Large Blowers

Industrial blowers can also require very large motors.

Applications may include:

• Process air systems
• Furnace air
• Industrial ventilation
• Dust collection
• Combustion-air systems
• Manufacturing processes

The drive provides controlled speed and centralized monitoring.

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12.6 Cement Plants

Large cement and mineral-processing facilities often contain high-power motors.

The drive can be considered for:

• Conveyors
• Large fans
• Material handling
• Process pumps
• Dust collection
• Auxiliary process machinery

The high current capacity is useful for very large motor installations.

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12.7 Steel and Metal Processing

Large metal-processing plants use high-power motor systems throughout the production process.

Potential applications include:

• Transfer conveyors
• Cooling systems
• Large fans
• Process equipment
• Material handling
• Auxiliary machinery

Centralized network communication can help integrate individual drives into the larger production-control system.

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13. Product Advantages

13.1 Very High Current Capacity

The 1135 A output rating is the defining advantage of this model.

It allows the drive to control motors that would be far beyond the range of compact industrial VFDs.

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13.2 High Horsepower Capability

The drive offers:

• 1100 HP Light Duty
• 1000 HP Normal Duty
• 800 HP Heavy Duty

This provides a useful range of application possibilities.

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13.3 Smooth Motor Acceleration

Large motors can create considerable mechanical stress when started directly.

A variable frequency drive can control acceleration.

This can reduce sudden mechanical loading on:

• Gearboxes
• Belts
• Couplings
• Shafts
• Bearings
• Drive pulleys

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13.4 Controlled Deceleration

The drive can also control the stopping process.

This is particularly useful for large rotating machinery with substantial inertia.

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13.5 Centralized Control

The absence of a permanently installed HIM in the AN0 configuration can be useful where the drive is operated from a centralized automation system.

This can make the cabinet arrangement cleaner and reduce the need for local operator access.

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13.6 Industrial Ethernet Integration

Embedded EtherNet/IP provides communication between the drive and the wider automation system.

This can simplify the exchange of:

• Commands
• Setpoints
• Status
• Speed
• Current
• Alarms
• Fault information

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13.7 Air-Cooled Construction

Air cooling provides a practical solution for a large industrial drive.

It avoids the additional infrastructure associated with liquid cooling systems.

The installation must nevertheless provide sufficient ventilation and appropriate ambient conditions.

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13.8 Broad Industrial Application Range

The PowerFlex 755 platform can be applied to a wide range of high-power industrial machinery.

This gives engineers greater flexibility when designing large motor-control systems.

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14. Advantages for Large Conveyors

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15. Advantages for Pump Systems

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16. Advantages for Fan and Blower Systems

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17. Important Selection Considerations

The 20G11LD1K2AN0NNNNN is a very large drive.

It should not be selected simply because its horsepower rating appears to match a motor.

The following parameters should be checked carefully.

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18. Five Related Models from the Same Series

The following models are useful for comparison because they are closely related PowerFlex 755 high-power configurations.

These models are particularly useful when comparing current capacity, operator-interface configuration and application requirements.

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19. Comparison with 1045 A Version

The 20G11LD1K0AN0NNNNN is one of the closest lower-current alternatives.

The 20G11LD1K2AN0NNNNN provides approximately 90 A more output-current capacity than the 1045 A version.

This additional capacity can be useful when the motor current is close to the limit of the lower-rated model.

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20. Higher-Current Alternative

20G11LD1K3AN0NNNNN

The 20G11LD1K3AN0NNNNN is another closely related high-power configuration.

This is useful when the motor current exceeds the practical range of the 1135 A version.

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21. Five Related Models — Detailed Comparison

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22. Five Popular Models from the Same Brand

For a broader product comparison, the following models represent different power ranges within the same overall industrial drive portfolio.

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23. Compact Drive Comparison

25B-D2P3N114

The 25B-D2P3N114 is intended for small motor applications and is therefore dramatically smaller than the 20G11LD1K2AN0NNNNN.

It is not a direct electrical replacement for the 1135 A drive.

It is included because it represents the compact end of the product range.

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24. Compact Drive Comparison

25B-D6P0N114

The 25B-D6P0N114 is another compact-drive option.

The physical size and current rating are dramatically lower than those of the 20G11LD1K2AN0NNNNN.

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25. Medium-Power Industrial Alternative

20F11ND077JA0NNNNN

The 20F11ND077JA0NNNNN represents a lower-current industrial drive configuration.

This model is suitable for substantially smaller motor applications than the 20G11LD1K2AN0NNNNN.

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26. Why Choose the 20G11LD1K2AN0NNNNN?

The model is particularly attractive when the application has several of the following characteristics:

• Motor power approaching the 1000 HP class
• Motor current approaching 1135 A
• 480 VAC three-phase electrical system
• Large conveyor system
• Large pump
• Large fan
• Large blower
• Mining equipment
• Cement equipment
• Steel-processing equipment
• Material-handling equipment
• Centralized automation
• EtherNet/IP communication
• Floor-standing installation
• No requirement for a permanent local HIM

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27. Installation Requirements

The physical installation of a drive of this size requires significantly more planning than a compact VFD.

The installation area should provide sufficient room for:

• Cabinet placement
• Cable routing
• Ventilation
• Maintenance
• Inspection
• Component replacement
• Power connections
• Control connections
• Network connections

Because the equipment is approximately 1200–1400 kg class, the floor structure should also be evaluated.

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28. Cooling Requirements

The drive uses forced-air cooling.

Large amounts of electrical power are converted during operation, and some of that energy appears as heat.

The installation therefore needs adequate airflow.

The following factors should be considered:

Dusty industrial environments require particular attention because accumulated dust can reduce cooling performance.

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29. Maintenance

Regular maintenance is important for a high-power drive.

Typical inspection areas include:

Preventive maintenance can help reduce unexpected downtime.

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30. Energy Management

Variable-speed operation can provide substantial energy benefits in suitable applications.

This is especially relevant to centrifugal pumps and fans.

When the process does not require full output, the drive can reduce motor speed.

Instead of running the motor continuously at maximum speed, the drive can adjust the motor operating point to suit process requirements.

The actual energy savings depend on the mechanical system, load profile, operating hours and control strategy.

For this reason, an energy-saving calculation should be based on actual operating conditions rather than a generic percentage.

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31. Control and Automation

The drive can be integrated into a larger automated system.

A typical control arrangement may contain:

Central Control System → EtherNet/IP Network → 20G11LD1K2AN0NNNNN → Large AC Motor → Mechanical Load

The control system can provide:

• Run command
• Stop command
• Speed reference
• Direction command
• Process setpoint

The drive can provide:

• Actual speed
• Output current
• Operating status
• Warning status
• Fault status
• Drive feedback

This arrangement is useful for plants where motor systems are operated from centralized control rooms.

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32. Recommended Model Selection by Application

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33. Key Specification Summary

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34. Overall Product Evaluation

The 20G11LD1K2AN0NNNNN is best understood as a high-capacity industrial motor-control solution for very large machines.

Its 1135 A output capability gives it a substantial advantage when controlling large motors.

The 1100 HP Light Duty rating makes it particularly suitable for applications where the motor power is around the thousand-horsepower level and the load profile permits the corresponding duty classification.

The 1000 HP Normal Duty rating provides strong capability for general industrial applications.

The 800 HP Heavy Duty rating provides a practical reference for more demanding load conditions where higher overload capability is important.

The 480 VAC three-phase configuration fits common large industrial electrical systems.

The Frame 9 air-cooled construction and 800 mm deep MCC-style enclosure make the drive suitable for large floor-standing installations.

The embedded EtherNet/IP communication capability is another important advantage because it allows the drive to be integrated into centralized industrial automation.

The absence of a permanently installed HIM in the AN0 configuration is also useful for systems where operation is primarily performed through an HMI, PLC or centralized control station.

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35. Final Recommendation

For a large 480 VAC motor around the 1000 HP range, the 20G11LD1K2AN0NNNNN is a strong choice within the PowerFlex 755 high-power range.

If the motor current is below approximately 1045 A, the 20G11LD1K0AN0NNNNN may provide a more appropriate lower-current option.

If approximately 1135 A is required and centralized control is preferred, the 20G11LD1K2AN0NNNNN is the more suitable selection.

If the application requires a local operator interface, the related 20G11LD1K2JN0NNNNN, 20G11LD1K2JN2NNNNN or 20G11LD1K2JN4NNNNN configurations can be considered depending on the required interface arrangement.

If the motor current is higher than the 1135 A class, the 20G11LD1K3AN0NNNNN provides a higher-capacity alternative.

For final selection, the most important values to verify are the motor nameplate voltage, full-load current, duty cycle, overload requirement, acceleration time, deceleration requirements, ambient temperature, installation altitude, motor cable arrangement and required communication architecture.

In short, the 20G11LD1K2AN0NNNNN is a large-frame, air-cooled, 480 VAC, 1135 A industrial AC drive designed for serious high-power motor applications, with strong suitability for conveyors, mining equipment, large pumps, fans, blowers, material handling and other demanding industrial machinery.