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20G11LD1K5AN0NNNNN — Detailed Product Description, Technical Parameters, Applications, Advantages and Related Models

1. Product Overview

The 20G11LD1K5AN0NNNNN is a high-power PowerFlex 755 AC packaged drive designed for large three-phase industrial motor applications.

It belongs to the PowerFlex 755 family and is intended for applications where a large motor requires precise variable-speed control, controlled acceleration and deceleration, high overload capability, and integration into an industrial automation system.

This particular catalog number is a 480 VAC, three-phase, 1525 A configuration. Its published duty ratings are approximately 1500 HP for Light Duty, 1350 HP for Normal Duty, and 1100 HP for Heavy Duty.

The drive is an air-cooled, floor-standing, large-frame industrial drive with an 800 mm deep MCC-style enclosure, making it substantially larger and heavier than conventional wall-mounted variable-frequency drives.

A particularly important point is that the 20G11LD1K5AN0NNNNN is an older/discontinued configuration. For new installations, the equivalent current configuration should be evaluated separately rather than assuming that an older catalog number and a newer configuration are physically and electrically identical.

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2. Brand and Product Family

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3. Main Technical Parameters

Important dimensional note: The catalog information identifies the enclosure as 800 mm deep, but a dependable catalog-specific height, width and shipping weight should not be invented. For a drive of this size, cabinet arrangement and shipping configuration can materially affect overall dimensions and weight. Therefore, for purchasing, foundation design, transport planning or replacement work, the exact mechanical drawing should be used.

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4. Electrical Capacity

The most important electrical characteristic of the 20G11LD1K5AN0NNNNN is its 1525 A current rating.

This puts the drive firmly in the very-high-power industrial category.

Its principal duty ratings are:

These three horsepower ratings should not be interpreted as interchangeable values.

The correct rating depends on the actual motor load, overload requirement, acceleration profile and application duty.

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5. Product Introduction

The 20G11LD1K5AN0NNNNN is designed to regulate the speed and torque of a large AC motor.

In a conventional fixed-speed motor installation, the motor is generally connected directly to the electrical supply through switching and protection equipment. The motor then operates close to its normal synchronous/slip-dependent operating speed.

With a variable-frequency drive, the electrical frequency and voltage supplied to the motor can be controlled electronically.

A simplified system can be represented as:

Three-Phase AC Supply → Drive Input → DC Bus → Inverter → Variable-Frequency AC → Motor

The drive therefore becomes an important part of the complete motor-control system.

For large industrial equipment, this can provide much greater control over starting, stopping, speed adjustment and process coordination.

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6. PowerFlex 755 Series Position

The PowerFlex 755 series is intended for demanding industrial applications where a basic compact drive is not sufficient.

Compared with smaller drives, this product family is particularly suitable for:

• Large conveyors
• Large pumps
• Large fans
• Blowers
• Mining equipment
• Material-handling machinery
• Process machinery
• Heavy industrial production equipment
• High-inertia rotating machinery

The 20G11LD1K5AN0NNNNN represents one of the very high-capacity configurations within this product family.

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7. Air-Cooled Construction

The drive uses forced-air cooling.

High-power semiconductor devices and other electrical components generate considerable heat during operation.

The cooling system therefore has to move a significant volume of air through the power section.

For this reason, installation conditions are particularly important.

A blocked airflow path can increase internal temperature and reduce equipment reliability.

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8. 800 mm Deep MCC-Style Cabinet

The specified configuration uses an 800 mm deep MCC-style cabinet arrangement.

This is an important mechanical characteristic.

It means the drive should be treated as large industrial electrical equipment rather than as a small electronic module.

Before installation, sufficient space should be provided for:

• Front access
• Maintenance
• Cable routing
• Cooling airflow
• Electrical connections
• Inspection
• Component replacement
• Safe working clearance

The 800 mm depth is a key dimension, but it should not be considered the complete overall equipment envelope.

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9. Enclosure and Protection

The configuration uses a Type 1 / IP20 enclosure arrangement.

This is intended for a controlled industrial electrical environment.

It should not be regarded as a weatherproof or water-resistant outdoor enclosure.

Where the equipment is installed in an environment with:

• Heavy dust
• Water
• Condensation
• Oil mist
• Corrosive chemicals
• High humidity
• Outdoor exposure

the installation environment should be evaluated carefully.

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10. Product Applications

10.1 Large Conveyor Systems

One of the most suitable application areas is large conveyor equipment.

Examples include:

• Mining conveyors
• Coal conveyors
• Ore conveyors
• Aggregate conveyors
• Bulk-material conveyors
• Port conveyors
• Long-distance belt conveyors
• Material-transfer conveyors

Large conveyor systems can contain significant mechanical inertia.

The drive can control the acceleration rate instead of allowing the motor to start abruptly.

This can reduce mechanical shock to the system.

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11. Mining Applications

Large mining operations use high-power motors for many types of machinery.

The 20G11LD1K5AN0NNNNN can be considered for applications such as:

• Ore handling
• Conveyor systems
• Crushers
• Material transfer
• Mine ventilation
• Dewatering
• Processing equipment
• Bulk-material handling

The 1525 A rating provides a large electrical capacity for very large motors.

For mining installations, environmental conditions should be considered carefully because dust, temperature and mechanical vibration can have a major impact on electrical equipment.

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12. Large Pumping Systems

The drive can also be applied to large industrial pumps.

Potential applications include:

• Water-transfer systems
• Cooling-water systems
• Industrial circulation pumps
• Mine dewatering
• Process-water systems
• Wastewater pumping
• Large pumping stations
• Industrial fluid-transfer systems

Variable-speed operation can allow pump output to follow the actual process requirement.

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13. Large Fan Applications

Large fans can consume substantial amounts of electrical power.

Potential applications include:

• Industrial ventilation
• Furnace ventilation
• Mine ventilation
• Exhaust systems
• Cooling systems
• Process ventilation
• Large air-handling systems

The drive can adjust the motor speed according to the required airflow.

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14. Large Blower Applications

The product is also suitable for consideration in large blower applications.

Typical examples include:

• Process air
• Combustion air
• Industrial air systems
• Furnace systems
• Dust collection
• Process gas handling
• Large ventilation systems

The ability to adjust motor speed can provide greater process flexibility.

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15. Cement and Aggregate Processing

Large cement, aggregate and mineral-processing facilities use many high-power motors.

Potential applications include:

• Raw-material conveyors
• Large process fans
• Exhaust fans
• Blowers
• Material-transfer systems
• Processing machinery
• Large ventilation systems

The high current capacity of this drive makes it appropriate for the upper end of industrial motor applications.

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16. Port and Bulk-Material Handling

Large ports and terminals often operate high-power conveyor systems.

Possible applications include:

• Bulk loading
• Bulk unloading
• Conveyor transfer
• Ship-loading systems
• Storage-yard conveyors
• Material-handling machinery

Controlled acceleration can be particularly useful where the conveyor carries large quantities of material.

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17. Advantages of the 20G11LD1K5AN0NNNNN

17.1 Very High Current Capacity

The 1525 A rating is the defining characteristic of this model.

It allows the drive to control very large motors that are well outside the range of compact variable-frequency drives.

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17.2 High Motor Power

The drive provides approximately:

1500 HP Light Duty

1350 HP Normal Duty

1100 HP Heavy Duty

This makes it suitable for very large industrial machinery.

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17.3 Variable-Speed Control

The motor does not have to operate continuously at one fixed speed.

The drive can provide a variable speed reference according to the process requirement.

This is especially valuable for:

• Pumps
• Fans
• Blowers
• Conveyors
• Process machinery

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18. Controlled Acceleration

Large motors can create significant mechanical stress when started abruptly.

A variable-frequency drive can gradually increase motor speed according to a programmed acceleration profile.

This can help reduce stress on:

• Motor shafts
• Couplings
• Gearboxes
• Bearings
• Conveyor belts
• Drive pulleys
• Mechanical structures

For large conveyor and high-inertia systems, this is an important advantage.

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19. Controlled Deceleration

The same concept applies when stopping the motor.

Instead of immediately removing motor power and allowing the mechanical system to coast, the drive can control the deceleration process.

This can make the stopping behavior more predictable.

The actual deceleration strategy must be selected according to the mechanical load and braking requirements.

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20. Process Flexibility

A large industrial process rarely operates at exactly the same demand all the time.

For example, a pump may need different flow rates during different production stages.

A fan may require different airflow.

A conveyor may need different speeds depending on production requirements.

A variable-speed drive allows the motor operating point to be adjusted without mechanically changing the transmission ratio.

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21. Potential Energy-Saving Benefits

Variable-speed control can provide substantial energy savings in suitable applications.

This is especially relevant for variable-torque loads.

Typical examples include:

• Centrifugal pumps
• Centrifugal fans
• Blowers

Reducing motor speed can reduce power consumption significantly in these applications.

However, energy savings should always be calculated from the actual load profile rather than assumed solely from the use of a variable-frequency drive.

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22. Industrial Automation Integration

The PowerFlex 755 platform is intended to operate as part of an industrial automation system.

A typical control structure can be represented as:

Controller → Drive Command → Motor → Machine → Process

The control system can use information such as:

• Start status
• Stop status
• Speed reference
• Actual speed
• Current
• Fault status
• Alarm status
• Drive status
• Operating condition

This makes the drive suitable for centralized control systems.

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23. Maintenance Advantages

Large industrial drives benefit from a structured preventive-maintenance program.

Regular maintenance is particularly important for a 1525 A drive because an unexpected failure can affect a major production system.

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24. Installation Considerations

Because this is a very large floor-standing drive, the installation should be planned before the equipment arrives.

The following should be considered:

• Floor loading
• Equipment foundation
• Transportation route
• Door dimensions
• Lifting equipment
• Cable routing
• Cooling airflow
• Maintenance clearance
• Electrical clearance
• Grounding
• Environmental conditions

The exact product weight should be confirmed from the physical equipment documentation before transportation or structural design.

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25. Dimensions and Weight

The available product information confirms the 800 mm cabinet depth.

For this particular catalog number, it is preferable not to assign an unverified height, width or weight.

This approach is more appropriate than giving a guessed weight in kilograms, particularly when the equipment will be installed on a structural floor or transported using lifting equipment.

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26. Electrical Parameter Table

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27. Five Same-Series or Closely Related Models

The following models are useful comparison choices because they belong to the same high-power PowerFlex 755 family or are very closely related configurations.

The 20G11LD1K4AN0NNNNN is a logical lower-capacity comparison.

The 20G11LD1K5JN0NNNNN is particularly relevant because it is the newer configuration associated with the same 1525 A / 1500 HP LD class.

The 20G11LD2K0AN0NNNNN moves into a considerably higher current and power range.

The 20G11LD1K3AN0NNNNN provides a lower-capacity option for applications where 1525 A is unnecessary.

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28. Same-Series Comparison

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29. Five Popular Models from the Same Brand

For comparison purposes, the following models represent different power levels within the same broad industrial-drive family.

These models are not all direct electrical substitutes.

The first two are intended for much smaller motors, while the last two are high-power industrial drives in the same general capacity class as the subject model.

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30. Model 25B-D2P3N114

This is not a replacement for the 20G11LD1K5AN0NNNNN.

It is included as a lower-power model for applications where the motor is considerably smaller.

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31. Model 25B-D6P0N114

This model is appropriate for relatively small industrial machinery rather than the very large motors associated with the subject model.

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32. Model 20F11ND077JA0NNNNN

This model is considerably smaller electrically than the 1525 A subject drive.

It is useful when comparing different drive-size requirements across an industrial plant.

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33. Model 20G11LD1K4AN0NNNNN

This is a logical lower-current alternative to the 20G11LD1K5AN0NNNNN.

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34. Model 20G11LD1K5JN0NNNNN

This is the most relevant modern comparison when evaluating the older 20G11LD1K5AN0NNNNN configuration.

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35. Model 20G11LD2K0AN0NNNNN

This model is appropriate for a substantially larger motor requirement than the 1525 A subject model.

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36. Main Advantages at a Glance

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37. Recommended Application Matching

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38. Important Selection Parameters

When replacing or purchasing a drive of this size, horsepower alone should not be used as the selection criterion.

The following parameters should all be checked.

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39. Maintenance Checklist

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40. Product Lifecycle Consideration

The 20G11LD1K5AN0NNNNN is an older catalog configuration.

For equipment already installed in an existing plant, this distinction is important because a discontinued model may still be completely usable in an existing system, while a new project may require evaluation of a current replacement.

The closely related 20G11LD1K5JN0NNNNN is particularly important when considering replacement planning because it maintains the same general 480 VAC / 1525 A / 1500 HP LD / 1350 HP ND / 1100 HP HD capacity class while using a newer configuration.

A replacement should nevertheless be checked for:

• Physical dimensions
• Cabinet arrangement
• Control architecture
• Communication
• Input configuration
• Motor-control functions
• Wiring
• Accessories
• Parameter compatibility
• Installation requirements

A replacement should never be selected solely because the horsepower and current numbers appear similar.

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41. Overall Product Evaluation

The 20G11LD1K5AN0NNNNN is a high-capacity PowerFlex 755 AC packaged drive intended for very large three-phase AC motors.

Its key electrical specifications are:

480 VAC

3 Phase

1525 A

1500 HP Light Duty

1350 HP Normal Duty

1100 HP Heavy Duty

Forced-Air Cooling

Type 1 Enclosure

IP20 Protection

800 mm Cabinet Depth

Its strongest application areas include large conveyors, mining machinery, pumps, fans, blowers, bulk-material handling systems and other high-power industrial equipment.

The main practical advantage is the combination of very high current capacity and variable-speed motor control. Instead of operating a large motor only at a fixed speed, the drive can regulate speed and acceleration according to the requirements of the machine and process.

For large conveyors, controlled acceleration can help reduce mechanical shock.

For pumps and fans, variable-speed operation can help match motor output to process demand and may provide energy-saving benefits in suitable variable-torque applications.

For mining and bulk-material handling, the large current rating makes the drive suitable for high-power motors used in demanding production systems.

From a mechanical perspective, the product should be treated as substantial floor-standing industrial equipment. The 800 mm depth is confirmed for this configuration, while the exact overall height, width and weight should be taken from the specific mechanical drawing or physical equipment documentation rather than estimated. This is particularly important because the equipment is large enough that transportation, floor loading, lifting and maintenance access become significant engineering considerations.

The closest alternatives are 20G11LD1K4AN0NNNNN for a somewhat lower current capacity, 20G11LD1K5JN0NNNNN for a closely related newer configuration, and 20G11LD2K0AN0NNNNN when substantially greater motor capacity is required.

For smaller systems, 20F11ND077JA0NNNNN, 25B-D6P0N114, and 25B-D2P3N114 provide progressively smaller drive classes.

In summary, the 20G11LD1K5AN0NNNNN is best regarded as a very-high-power industrial variable-frequency drive for large 480 VAC motors, with its 1525 A output capacity, 1500 HP Light-Duty rating, 1350 HP Normal-Duty rating and 1100 HP Heavy-Duty rating being the key specifications for application selection.