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20G11LD800AN2NNNNN — Detailed Product Overview and Technical Specification

The 20G11LD800AN2NNNNN is a high-power air-cooled AC drive from the PowerFlex 755 family. The model is designed for large industrial motor-control applications where high current capacity, adjustable speed and controlled acceleration/deceleration are required.

The information below is presented in English, with no web addresses or source list. I have also avoided inserting an unverified exact weight where the available product information does not establish a reliable kilogram value. For a drive of this size, the final shipping and installed weight can vary with the cabinet and configuration.

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1. Product Identification

The model number identifies a large packaged drive rather than a small modular VFD. Its 800 A rating places it in the high-power end of the PowerFlex 755 product range.

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2. Product Introduction

The 20G11LD800AN2NNNNN is intended to control large three-phase AC motors by regulating the electrical frequency and voltage supplied to the motor.

In a conventional fixed-speed motor installation, the motor is normally connected to the AC supply through a starter or switching device. The motor then operates at a speed determined largely by the supply frequency and motor characteristics.

A variable-frequency drive changes this arrangement.

The basic operating sequence is:

Three-Phase AC Input → Input/Precharge Section → DC Bus → Inverter → Variable-Frequency AC Output → Motor

The drive can therefore regulate motor speed according to the needs of the machine or process.

For large industrial equipment, this can be particularly valuable because starting, stopping and changing the speed of a large motor can otherwise place considerable stress on the electrical and mechanical systems.

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3. Main Technical Parameters

The available technical identification confirms the important electrical and mechanical characteristics: 480 V three-phase operation, 800 A output, Frame 9 construction, air cooling and an 800 mm-deep Type 1 MCC-style enclosure.

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4. Power Rating

The 800 A rating is the most important electrical characteristic of this model.

For comparison, the associated PowerFlex 755 packaged-drive configuration is rated at approximately:

The distinction between Light Duty, Normal Duty and Heavy Duty is important.

A motor application should not be selected solely according to horsepower.

Motor full-load current, overload requirements, acceleration characteristics, load inertia and operating cycle should all be considered.

For a conveyor with high starting torque, for example, a Heavy-Duty selection may be more appropriate than simply matching the motor horsepower to a Light-Duty rating.

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5. Mechanical Parameters

The model uses a large industrial cabinet rather than a compact drive enclosure.

Dimensions and Weight

For this model, the 800 mm cabinet depth is a useful fixed identification point.

The exact overall width, overall height and equipment weight should not be guessed because a high-power packaged drive can contain different cabinet arrangements and field-wiring configurations.

For transportation, lifting, foundation design and structural calculations, the exact mechanical drawing for the particular unit should be used.

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6. Enclosure

The model is associated with a:

Type 1 / 800 mm Deep MCC Style enclosure

and an:

IP20 protection level.

This type of construction is intended for a controlled industrial installation.

It is not equivalent to a weatherproof outdoor enclosure.

The installation should therefore provide suitable protection against:

• Rain
• Direct water
• Excessive dust
• Condensation
• Corrosive atmosphere
• Excessive temperature
• Contamination of cooling passages

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7. Cooling System

The 20G11LD800AN2NNNNN is an air-cooled high-power drive.

An 800 A drive can produce substantial heat during operation.

The cooling system therefore becomes an important part of the installation.

Adequate airflow should be maintained around the equipment.

Important considerations include:

• Cooling-fan condition
• Airflow direction
• Ventilation
• Cabinet temperature
• Room temperature
• Dust accumulation
• Air-filter condition where applicable
• Clearance around ventilation openings
• Heat dissipation from the electrical room

Poor ventilation can cause unnecessary thermal stress and may reduce the service life of power electronics.

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8. Input Configuration

The model uses an AC input with precharge.

The precharge function is important in a large DC-bus drive because it controls the initial charging of the DC-link capacitors.

Without appropriate precharge control, the initial energization of a large DC bus could result in excessive inrush current.

The input section is therefore an important part of the overall high-power drive architecture.

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9. Dynamic Braking

The specified configuration is listed without dynamic braking.

This is important when selecting the drive for high-inertia loads.

For applications where the motor must decelerate rapidly, engineers should evaluate whether the machine requires:

• Dynamic braking
• Regenerative operation
• A braking resistor arrangement
• Extended coast-down time
• Mechanical braking

A conveyor, centrifuge or large rotating machine may have very different braking requirements from a centrifugal fan.

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10. Product Applications

The 20G11LD800AN2NNNNN is particularly appropriate for large industrial machinery.

Typical application areas include:

Large Conveyor Systems

• Mining conveyors
• Aggregate conveyors
• Coal conveyors
• Ore conveyors
• Cement conveyors
• Port conveyors
• Bulk-material conveyors
• Long-distance material-handling systems

Pumping Systems

• Industrial water pumps
• Mine dewatering
• Cooling-water systems
• Process-water systems
• Large circulation pumps
• Industrial wastewater systems

Fans and Blowers

• Mine ventilation
• Industrial ventilation
• Process exhaust
• Large cooling fans
• Furnace ventilation
• Dust-collection systems
• Industrial blowers

Heavy Manufacturing

• Steel-processing machinery
• Cement plants
• Aggregate processing
• Material handling
• Large production machinery
• Process equipment

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11. Conveyor Applications

Large conveyors are one of the strongest application areas for a drive of this size.

A heavily loaded conveyor can have substantial inertia.

If a large motor is started directly across the line, the sudden application of torque can produce mechanical shock.

A variable-frequency drive allows the motor to accelerate in a controlled manner.

This can reduce stress on:

• Conveyor belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Drive pulleys
• Mechanical structures

It can also provide greater flexibility in controlling conveyor speed.

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12. Mining Applications

Mining equipment often contains motors with very high power requirements.

Potential applications include:

• Ore transportation
• Mine conveyors
• Crushers
• Material transfer systems
• Ventilation
• Dewatering
• Processing equipment
• Bulk-material handling

The 800 A rating makes this model appropriate for the electrical scale associated with large mining machinery.

Environmental conditions must still be evaluated carefully.

Mining environments can contain:

• Dust
• Vibration
• Temperature variations
• Contaminants
• High mechanical loading

The electrical-room environment should therefore be designed appropriately.

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13. Pump Applications

The drive can also be used with large industrial pumps.

Variable-speed pump control can provide:

• Adjustable flow
• Adjustable pressure
• Smooth acceleration
• Smooth stopping
• Improved process control
• Reduced mechanical stress
• Potential energy savings

For centrifugal pumps, reducing speed can significantly change the hydraulic operating point.

The actual energy benefit depends on the pump and system characteristics.

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14. Fan Applications

Large industrial fans frequently operate under changing ventilation requirements.

A variable-speed drive allows the motor speed to be adjusted instead of keeping the fan at maximum speed continuously.

Possible benefits include:

• Adjustable airflow
• Improved process control
• Reduced starting stress
• Smooth speed adjustment
• Potential energy savings
• Better response to changing operating conditions

This can be particularly useful for large ventilation systems.

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15. Blower Applications

Industrial blowers may require large motors and continuous operation.

The drive can provide controlled operation for:

• Process-air systems
• Combustion-air systems
• Dust extraction
• Industrial ventilation
• Pneumatic processes
• Process gas circulation

The actual drive selection should consider whether the blower requires constant torque, variable torque or another load characteristic.

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16. Cement and Aggregate Applications

Cement and aggregate plants contain many large rotating machines.

Possible applications include:

• Large conveyors
• Crushers
• Large fans
• Blowers
• Pumps
• Material-transfer systems
• Dust-collection equipment

The drive’s high current capability makes it suitable for the electrical scale of many large process machines.

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17. Steel and Heavy Manufacturing

Large industrial plants can use high-power AC drives for:

• Cooling systems
• Large pumps
• Process fans
• Conveyors
• Material-handling equipment
• Large rotating machinery
• Production lines

The ability to control motor speed gives the process-control system more flexibility.

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18. Main Product Advantages

18.1 High Current Capacity

The 800 A output rating is the primary advantage.

This allows the drive to be used with large motors that are far beyond the practical range of compact VFDs.

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18.2 High-Power Industrial Design

The Frame 9 floor-standing construction is intended for substantial industrial installations.

This makes the drive appropriate for large machines where a small wall-mounted drive would not be practical.

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18.3 Controlled Starting

Large motors can produce substantial starting current and torque.

Variable-frequency starting allows the motor to accelerate progressively.

This can reduce mechanical shock and improve the starting behavior of the machine.

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18.4 Controlled Speed

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

Speed can be adjusted according to process requirements.

This is particularly valuable for:

• Pumps
• Fans
• Conveyors
• Blowers
• Material-handling systems

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18.5 Controlled Deceleration

The drive can control motor deceleration according to the programmed operating strategy.

This can be useful for large rotating loads where an uncontrolled stop would cause excessive mechanical stress.

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19. Industrial Automation Benefits

The PowerFlex 755 family is intended for integration into industrial control systems.

A typical control architecture can be represented as:

PLC / Controller → Drive → Motor → Machine → Process

The drive can participate in functions such as:

• Start/stop
• Speed reference
• Motor-current monitoring
• Status monitoring
• Fault detection
• Alarm handling
• Process control
• Operating-condition feedback

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

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20. Energy Efficiency Considerations

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

The strongest opportunities are generally associated with variable-torque loads such as centrifugal pumps and fans.

Potential benefits include:

• Reduced throttling
• Reduced operating speed
• Improved process matching
• Reduced unnecessary motor output
• Better process control

However, energy savings should always be calculated from the actual load profile.

A constant-torque conveyor, for example, behaves differently from a centrifugal fan.

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21. Installation Requirements

A drive of this size requires significantly more installation planning than a small VFD.

Important considerations include:

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22. Maintenance

A high-power drive should be incorporated into a preventive-maintenance program.

The maintenance frequency should be established according to operating hours, environmental conditions and the criticality of the machine.

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23. Five Same-Series or Closely Related Models

The following models are useful for comparing the 20G11LD800AN2NNNNN with other large PowerFlex 755 configurations.

The 20G11LD800AN2NNNNN is particularly interesting because the basic electrical capacity is the same as the 800 A configuration, while the catalog suffix specifies a different packaged arrangement.

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24. Five Related PowerFlex 755 Models

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25. Five Related Models from the Same Product Family

These alternatives are most useful when the actual motor current is close to the 800 A range and the engineer needs to move either downward or upward in drive capacity.

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26. Five Popular Models from the Same Brand

For broader product comparison, smaller and larger drive models can also be considered.

These five models demonstrate the broad range of motor-control capacities available under the same brand family.

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27. Detailed Comparison with Smaller Drives

The 20G11LD800AN2NNNNN should not be selected simply because it belongs to the same general AC-drive category as a compact drive.

The difference in electrical scale is substantial.

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28. Advantages Compared with a Conventional Motor Starter

A conventional starter primarily provides switching and basic motor protection.

A high-power variable-frequency drive provides considerably more control.

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29. Why the 800 A Rating Matters

The 800 A rating gives the model considerable capacity for large industrial motors.

At this electrical scale, the drive becomes a major component of the plant’s motor-control infrastructure.

The installation therefore needs careful consideration of:

• Incoming feeder
• Protective devices
• Cable sizing
• Grounding
• Short-circuit considerations
• Harmonic performance
• Cabinet ventilation
• Motor cable length
• Motor insulation
• Maintenance access

The drive should be treated as part of a complete electrical system rather than as an isolated component.

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30. Application Selection Guide

The model makes sense when the motor and machine are genuinely in the large industrial power range.

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31. Recommended Engineering Checks

Before replacing an existing drive with 20G11LD800AN2NNNNN, compare the following values from the motor nameplate:

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32. Practical Advantages in a Factory

For a large factory, the drive can provide operational advantages beyond simple speed control.

It can help operators manage:

• Production speed
• Start/stop sequences
• Process throughput
• Conveyor speed
• Pump flow
• Fan airflow
• Machine synchronization
• Fault conditions

This makes the drive an important part of a modern automated production system.

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33. Reliability Considerations

High-power electronic equipment requires appropriate environmental and thermal management.

The following practices are particularly important:

1. Keep ventilation paths clear.
2. Avoid excessive dust accumulation.
3. Maintain appropriate cabinet temperature.
4. Check cooling fans periodically.
5. Inspect power connections.
6. Maintain proper grounding.
7. Monitor recurring faults.
8. Avoid repeated operation beyond the applicable duty rating.
9. Maintain sufficient service access.
10. Keep the electrical environment clean and dry.

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34. Storage and Transportation Considerations

Because the unit is a large floor-standing drive, transportation planning is more complicated than for a compact VFD.

The project should consider:

• Cabinet dimensions
• Door and corridor dimensions
• Lifting points
• Forklift capacity
• Crane capacity
• Floor loading
• Packaging dimensions
• Storage environment
• Moisture protection
• Installation sequence

The exact equipment weight in kg should be taken from the final mechanical documentation before lifting equipment is selected.

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35. Complete Technical Specification Table

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36. Model Selection Summary

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37. Overall Product Assessment

The 20G11LD800AN2NNNNN is a substantial industrial AC drive intended for applications where motor power, current and mechanical load are considerably higher than those handled by compact variable-frequency drives.

Its key characteristics are the 480 VAC three-phase input, 800 A current rating, Frame 9 construction, air-cooled architecture, and Type 1 / IP20 800 mm-deep MCC-style cabinet.

Its strongest application areas are large conveyors, mining machinery, pumps, fans, blowers, bulk-material handling, cement and aggregate equipment and other heavy industrial machines.

The main advantages are high current capacity, controlled motor acceleration, variable-speed operation, controlled stopping, process flexibility and suitability for integration into industrial automation systems.

For an engineer comparing nearby models, the most useful alternatives are the 20G11LD710AN0NNNNN, 20G11LD740AN0NNNNN, 20G11LD800AN0NNNNN, 20G11LE825AN0NNNNN and 20G11LE900AN0NNNNN.

For smaller applications, compact PowerFlex models are more appropriate. For motors approaching or exceeding the 800 A range, higher-capacity PowerFlex 755 configurations should be evaluated.

One important point is that dimensions and weight should not be estimated for this particular high-power cabinet. The verified cabinet depth is 800 mm, while the final overall dimensions and weight in kg depend on the specific packaged configuration. For installation, transportation and lifting calculations, the exact mechanical configuration should always take priority over a generic catalogue estimate.