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Allen-Bradley 20G1G3C750LNDNNNNN – PowerFlex 755TL Low-Harmonic AC Drive

1. Product Overview

The Allen-Bradley 20G1G3C750LNDNNNNN is a high-power industrial variable frequency drive designed for large three-phase AC motor applications.

It belongs to the PowerFlex 755T family and, more specifically, the PowerFlex 755TL low-harmonic AC drive series.

This model is designed for applications where a conventional compact variable frequency drive is not sufficient. With a 750 A normal-duty current rating and approximately 400 kW normal-duty power capability, it is intended for large pumps, fans, blowers, compressors, conveyors, process machinery, mining equipment, water-treatment systems, and other large industrial motor loads.

The 20G1G3C750LNDNNNNN uses a low-harmonic active front end. This is one of the most important characteristics of the PowerFlex 755TL series. The input stage is designed to actively control the current drawn from the incoming electrical supply, helping reduce harmonic current compared with a conventional passive input arrangement.

The result is a drive platform that combines high-power motor control with attention to input power quality.

The drive also uses the TotalFORCE control platform, which provides advanced motor-control, monitoring, diagnostics, and system-integration functions.

For large industrial installations, this combination is important because the drive is not simply controlling motor speed. It can become a central part of the overall process-control and electrical-power system.

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2. Brand and Product Family

Item	Specification
Model	20G1G3C750LNDNNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 755T
Product Series	PowerFlex 755TL
Product Type	Low-Harmonic AC Drive
Drive Category	High-Power Variable Frequency Drive
Input Voltage	400 VAC
Input Phase	Three-phase
Normal-Duty Current	750 A
Normal-Duty Power	Approximately 400 kW
Light-Duty Power	Approximately 450 kW
Heavy-Duty Power	Approximately 315 kW
Frame Size	Frame 8
Cooling	Forced Air
Mounting	Floor Mount
Enclosure	IP21 / UL Type 1
Input Technology	Low-Harmonic Active Front End
Control System	TotalFORCE
Typical Application	Large industrial motors and process equipment

The product hierarchy can be summarized as:

Allen-Bradley → PowerFlex 755T → PowerFlex 755TL → 400 VAC → Frame 8 → 750 A → approximately 400 kW normal duty.

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3. Basic Product Identification

The catalog number 20G1G3C750LNDNNNNN provides information about the basic construction and rating of the drive.

Catalog Code	General Meaning
20G	PowerFlex 755T platform
1	Forced-air cooling
G	Low-harmonic active-front-end configuration
3	IP21 / UL Type 1 floor-mounted configuration
C	400 VAC, three-phase
750	750 A normal-duty rating
L	Factory configuration / option code
N…	Additional factory configuration positions

The 750 section is the most important part when identifying the electrical capacity of this particular model.

It indicates the 750 A current class.

The complete catalog number should always be used when identifying the actual factory configuration because the suffix positions can define additional options and construction details.

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4. Main Technical Parameters

Parameter	20G1G3C750LNDNNNNN
Model	20G1G3C750LNDNNNNN
Brand	Allen-Bradley
Family	PowerFlex 755T
Series	PowerFlex 755TL
Product Type	Low-Harmonic AC Drive
Input Voltage	400 VAC
Input Phase	3 Phase
Input Frequency	50/60 Hz system dependent
Normal-Duty Current	750 A
Normal-Duty Power	Approx. 400 kW
Light-Duty Power	Approx. 450 kW
Heavy-Duty Power	Approx. 315 kW
Frame Size	Frame 8
Cooling Method	Forced Air
Mounting	Floor Mount
Enclosure	IP21 / UL Type 1
Input Configuration	Low-Harmonic AFE
Control	TotalFORCE
Dynamic Braking	None as standard
Standard EMI Protection	Yes
Typical Installation	Industrial electrical room / process facility
Width	Approx. 1,200 mm
Depth	Approx. 675 mm
Height	Approx. 2,132 mm
Weight	Approx. 861.8 kg

The dimensions and weight represent the general Frame 8 IP21 drive configuration. Actual installed equipment dimensions can be larger when additional cabinets, wiring bays, filters, or other options are included.

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5. Electrical Rating

The main electrical rating of this model is:

400 VAC / three-phase / 750 A / approximately 400 kW normal duty.

The drive also supports different duty levels.

Duty Rating	Current / Power Class
Model	20G1G3C750LNDNNNNN
Light Duty	Approx. 450 kW / 796 A class
Normal Duty	Approx. 400 kW / 750 A
Heavy Duty	Approx. 315 kW / 585 A class
Input Voltage	400 VAC
Phase	Three-phase
Frame	8

This distinction is important when selecting the drive for an actual machine.

A 400 kW motor used on a relatively smooth variable-torque application may have different drive requirements from a 315 kW motor driving a high-inertia or high-overload machine.

The motor nameplate current, overload requirements, acceleration requirements, and actual load profile should therefore be evaluated together.

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6. Dimensions and Weight

The 20G1G3C750LNDNNNNN is a large floor-mounted industrial drive.

It is considerably larger and heavier than compact machine-level variable frequency drives.

Mechanical Parameter	20G1G3C750LNDNNNNN
Model	20G1G3C750LNDNNNNN
Frame	Frame 8
Mounting	Floor Mount
Enclosure	IP21 / UL Type 1
Width	Approx. 1,200 mm
Depth	Approx. 675 mm
Height	Approx. 2,132 mm
Width	Approx. 47.2 in
Depth	Approx. 26.6 in
Height	Approx. 83.9 in
Approx. Weight	861.8 kg
Approx. Weight in Pounds	1,900 lb
Cooling	Forced Air

The approximate dimensions of 1,200 × 675 × 2,132 mm should be considered during equipment-room planning.

The approximately 861.8 kg basic weight is also significant.

Transportation, lifting, floor loading, positioning, maintenance access, and ventilation should all be considered before installation.

When additional system cabinets or optional equipment are included, the final physical footprint and shipping weight can increase.

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7. Product Introduction

The PowerFlex 755TL is designed for high-power applications where the drive must provide both advanced motor control and improved input power characteristics.

A conventional variable frequency drive generally uses a rectifier to convert incoming AC power into DC power before producing variable-frequency AC power for the motor.

That conversion process can introduce harmonic current into the electrical supply.

For small drives, this may not be a major concern.

For large industrial drives, however, the electrical impact can become much more important.

A large motor drive can represent a significant portion of the electrical load of an entire production facility.

If several large drives operate simultaneously, the resulting harmonic currents can affect the electrical distribution system.

The PowerFlex 755TL addresses this requirement through its low-harmonic active front end.

The active front end is designed to control the input current waveform and reduce harmonic distortion.

This makes the drive particularly appropriate for large installations where electrical power quality is an important part of the overall engineering design.

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8. Low-Harmonic Active Front End

The low-harmonic input stage is one of the main technical advantages of this product.

A traditional passive rectifier draws current from the AC supply in a waveform that contains harmonic components.

An active front end provides much more control over the way current is drawn from the electrical supply.

For a high-power 750 A drive, this can be particularly valuable.

Potential benefits include:

• Reduced input current harmonic distortion.
• Improved electrical power quality.
• Reduced harmonic impact on upstream equipment.
• Better suitability for facilities containing multiple large drives.
• Better control of interaction with the plant electrical system.
• Improved suitability for installations with power-quality requirements.
• Reduced need to rely solely on external harmonic-mitigation equipment in applications where the active-front-end design meets the system requirements.

The actual performance of the complete installation depends on the transformer, upstream impedance, cabling, other loads, filters, operating conditions, and the final system configuration.

Therefore, harmonic performance should always be evaluated at the system level.

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9. TotalFORCE Control

The PowerFlex 755TL uses the TotalFORCE control platform.

This is intended for applications requiring more than simple frequency adjustment.

The control platform supports sophisticated motor-control and diagnostic functions.

Typical capabilities include:

• Speed control.
• Torque control.
• Acceleration and deceleration control.
• Motor tuning.
• Feedback control.
• Drive monitoring.
• Fault diagnostics.
• Alarm monitoring.
• Process control.
• Communication with automation systems.
• Advanced parameter configuration.
• Motor performance monitoring.

For large industrial applications, these capabilities can be very useful.

A pump, for example, can receive a process-based speed reference.

A conveyor can receive speed commands from the production system.

A fan can adjust its speed according to airflow requirements.

A compressor can coordinate operation with other process equipment.

In these situations, the drive becomes an active component of the automation system.

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10. Main Product Advantages

10.1 High-Power Capability

The 750 A current rating places this model in the high-power industrial category.

The approximate normal-duty rating of 400 kW allows it to control large industrial motors.

This makes it suitable for applications where compact drives are no longer practical.

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10.2 Low-Harmonic Input

The low-harmonic active-front-end architecture is one of the strongest reasons to select the PowerFlex 755TL series.

Large drives can have a significant effect on a plant’s electrical system.

The active front end helps control input current distortion.

This is particularly useful in plants with several large drives or sensitive electrical equipment.

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10.3 Advanced Motor Control

The drive provides advanced control of speed and torque.

This is important for applications where acceleration, deceleration, speed regulation, and torque control need to be carefully managed.

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10.4 Large Application Range

The drive can be applied to many types of large machinery.

Typical examples include:

• Large pumps.
• Large fans.
• Blowers.
• Compressors.
• Conveyors.
• Crushers.
• Mills.
• Mining equipment.
• Water-treatment equipment.
• Material-handling systems.
• Process machinery.
• Large HVAC equipment.

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10.5 Industrial Diagnostics

High-power drives often operate critical production equipment.

A fault can potentially stop an entire production process.

The drive’s diagnostic and monitoring functions can help maintenance personnel understand the operating condition of the equipment.

This can make troubleshooting more systematic and reduce unnecessary downtime.

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10.6 Industrial Integration

The PowerFlex 755T platform is designed to work within larger industrial automation architectures.

Depending on the final configuration, the system can support different communication, feedback, I/O, safety, and control requirements.

This flexibility is useful when the drive must be integrated into an existing production-control system.

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11. Product Applications

11.1 Large Pump Applications

Large pumps are a natural application for the 20G1G3C750LNDNNNNN.

Pump demand can vary significantly throughout the day.

A variable-speed drive allows the motor speed to follow actual process demand.

Applications include:

• Water distribution.
• Raw-water pumping.
• Industrial process pumping.
• Cooling-water systems.
• Wastewater transfer.
• High-capacity process pumps.

The drive can provide controlled starting and stopping, speed regulation, and process integration.

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12. Water and Wastewater Systems

Water-treatment plants often contain large pumps and blowers.

The 755TL can be used for large motor-driven equipment where variable-speed operation is required.

Possible applications include:

• Raw-water intake pumps.
• Water-distribution pumps.
• Wastewater pumps.
• Process pumps.
• Aeration blowers.
• Large ventilation systems.
• Sludge-handling equipment.

In a large treatment plant, the low-harmonic characteristics can also be useful because several high-power motors may be connected to the same electrical distribution system.

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13. Fans and Blowers

Large fans and blowers can require hundreds of kilowatts of motor power.

The speed required by the process may vary considerably.

Instead of running a motor continuously at maximum speed and restricting airflow mechanically, a variable-frequency drive can adjust motor speed.

Potential benefits include:

• Better airflow control.
• Reduced mechanical stress.
• Better process regulation.
• Potential energy savings.
• Controlled acceleration and deceleration.

Typical applications include:

• Industrial ventilation.
• Mining ventilation.
• Furnace systems.
• Process exhaust.
• Large HVAC installations.
• Cooling systems.
• Combustion-air systems.

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14. Compressor Applications

Large compressors can require significant motor power and carefully controlled acceleration.

The PowerFlex 755TL can be used in compressor applications where variable-speed operation is suitable.

The exact drive duty should be selected based on the compressor’s actual mechanical characteristics.

Compressor applications can involve demanding torque requirements, particularly during starting and changes in operating conditions.

The 750 A drive class provides substantial capacity for large compressor motors when the application falls within the appropriate electrical and mechanical limits.

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15. Conveyor Applications

Large conveyors are another important application.

Conveyor systems can have substantial inertia, especially when carrying large quantities of material.

Sudden starting can create high mechanical stress.

A variable frequency drive allows the motor to accelerate gradually.

This can help reduce:

• Belt stress.
• Gearbox shock.
• Coupling stress.
• Mechanical vibration.
• Product movement problems.
• Starting impact.

Applications include:

• Mining conveyors.
• Bulk-material handling.
• Port equipment.
• Cement plants.
• Aggregate plants.
• Large production lines.

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16. Mining Applications

Mining equipment frequently requires high-power motors.

The 20G1G3C750LNDNNNNN can be considered for applications such as:

• Long conveyors.
• Mine ventilation.
• Dewatering pumps.
• Process pumps.
• Crushers.
• Material handling.
• Processing equipment.
• Large fans.

The high current capacity makes it appropriate for substantial motors, while the low-harmonic input architecture can be useful in large industrial electrical systems.

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17. Industrial Process Applications

The drive can also be used in large process systems where motor speed must be controlled according to production requirements.

Examples include:

• Large mixers.
• Process pumps.
• Large fans.
• Blowers.
• Material-handling equipment.
• Cooling equipment.
• Production machinery.
• Large rotating machinery.

The TotalFORCE control system makes it possible to integrate motor control into the broader process-control strategy.

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18. Application Summary

Application	Main Requirement	Benefit of 20G1G3C750LNDNNNNN
Large Pumps	Variable flow and pressure	Precise variable-speed operation
Large Fans	Variable airflow	Controlled motor speed
Blowers	Continuous airflow	Speed and process control
Compressors	High-power motor control	Controlled speed and torque
Conveyors	Controlled starting	Reduced mechanical shock
Mining Equipment	Large motor loads	High-current drive capability
Water Treatment	High-capacity pumps	Variable-speed process control
Wastewater	Pumps and blowers	Flexible operation
Industrial HVAC	Large fans and pumps	Variable-speed control
Process Machinery	Speed/torque regulation	Advanced motor control
Material Handling	High inertia	Controlled acceleration/deceleration

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19. Installation Considerations

The 20G1G3C750LNDNNNNN should be considered as part of a complete electrical and mechanical system.

The incoming electrical supply must be suitable for the drive.

Important areas include:

• Transformer capacity.
• Switchgear.
• Input protection.
• Grounding.
• Cable sizing.
• Motor cable routing.
• Harmonic requirements.
• Short-circuit characteristics.
• Ambient temperature.
• Ventilation.
• Floor loading.
• Maintenance access.

Because the drive weighs approximately 861.8 kg, mechanical handling needs to be planned before installation.

The installation area should also provide enough space for service personnel to inspect and maintain the equipment.

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20. Cooling Requirements

The drive uses forced-air cooling.

High-power semiconductor devices, capacitors, filters, bus components, and other electrical components generate heat during normal operation.

The installation room therefore needs adequate heat removal.

Important considerations include:

• Ambient temperature.
• Ventilation airflow.
• Room cooling.
• Air cleanliness.
• Dust levels.
• Humidity.
• Altitude.
• Fan condition.
• Air-filter condition where applicable.

Poor ventilation can increase component temperatures and reduce equipment life.

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21. Maintenance

A high-power drive should be included in a preventive-maintenance program.

Typical maintenance activities include:

• Inspecting cooling fans.
• Cleaning ventilation paths.
• Inspecting electrical connections.
• Checking for signs of overheating.
• Reviewing fault history.
• Checking alarm history.
• Inspecting control wiring.
• Checking grounding.
• Monitoring operating temperature.
• Checking cabinet cleanliness.
• Reviewing motor operating conditions.
• Inspecting aging components according to the maintenance program.

In critical production applications, maintenance should be planned before a failure occurs.

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22. Physical Installation Planning

The physical size of this model deserves particular attention.

The approximate dimensions are:

1,200 mm wide × 675 mm deep × 2,132 mm high.

The approximate basic weight is:

861.8 kg.

This means that installation planning should include:

• Floor structural capacity.
• Equipment access.
• Transportation route.
• Lifting equipment.
• Service clearance.
• Cable entry.
• Ventilation.
• Heat dissipation.
• Maintenance access.
• Safe working space.

A drive of this size should not be installed in an area where access is restricted or where ventilation is inadequate.

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23. Five Related Models in the Same Series

The following models are closely related PowerFlex 755TL configurations in the 400 V range.

They provide useful alternatives when the required motor current or power is different.

Model	Series	Input	Normal-Duty Current	Normal-Duty Power	Light-Duty Power	Heavy-Duty Power	Frame	Approx. Dimensions W × D × H	Approx. Weight
20G1G3C540LNDNNNNN	PowerFlex 755TL	400 VAC, 3 Ph	540 A	315 kW	315 kW	250 kW	8	1200 × 675 × 2132 mm	Approx. 861.8 kg
20G1G3C585LNDNNNNN	PowerFlex 755TL	400 VAC, 3 Ph	585 A	315 kW	355 kW	250 kW	8	1200 × 675 × 2132 mm	Approx. 861.8 kg
20G1G3C650LNDNNNNN	PowerFlex 755TL	400 VAC, 3 Ph	650 A	355 kW	400 kW	315 kW	8	1200 × 675 × 2132 mm	Approx. 861.8 kg
20G1G3C770LNDNNNNN	PowerFlex 755TL	400 VAC, 3 Ph	770 A	400 kW	450 kW class	355 kW class	8	1200 × 675 × 2132 mm	Approx. 861.8 kg
20G1G3C920LNDNNNNN	PowerFlex 755TL	400 VAC, 3 Ph	920 A	500 kW	560 kW class	400 kW class	8	Configuration dependent	Configuration dependent

The C540, C585, C650, C770 and C920 configurations provide a useful range for comparing large 400 V industrial motor applications.

The exact physical construction can change depending on the selected factory options, cabinet arrangement, filtering, and other configuration details.

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24. Related Model Comparison

Model	Normal-Duty Current	Normal-Duty Power	General Application Range
20G1G3C540LNDNNNNN	540 A	315 kW	Large industrial motors
20G1G3C585LNDNNNNN	585 A	315 kW	High-current 315 kW applications
20G1G3C650LNDNNNNN	650 A	355 kW	Large 355 kW-class applications
20G1G3C750LNDNNNNN	750 A	400 kW	Large 400 kW-class applications
20G1G3C770LNDNNNNN	770 A	400 kW	High-current 400 kW applications
20G1G3C920LNDNNNNN	920 A	500 kW	Larger high-power applications

The C750 model is therefore positioned above the C650 class and below the larger C920 class in terms of current and normal-duty power.

For a motor application around 400 kW, the C750 configuration provides a substantial current margin compared with smaller 400 V models, subject to the actual motor nameplate current and required duty.

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25. Five Commonly Used Models from the Same Brand

The following models represent other commonly used products from the same brand across different PowerFlex families.

They cover substantially smaller motor applications than the 20G1G3C750LNDNNNNN and are therefore useful for comparison rather than direct substitution.

Model	Series	Voltage Class	Current Class	Approx. Power Range	Approx. Dimensions W × D × H	Approx. Weight
25B-D024N114	PowerFlex 525	400/480 V class	24 A	Approx. 11–15 kW	Approx. 180 × 100 × 200 mm	Approx. 3–4 kg
25B-D017N114	PowerFlex 525	400/480 V class	17 A	Approx. 7.5–11 kW	Approx. 180 × 100 × 200 mm	Approx. 3 kg
25B-D010N114	PowerFlex 525	400/480 V class	10 A	Approx. 4–5.5 kW	Approx. 180 × 100 × 200 mm	Approx. 2–3 kg
25A-D017N114	PowerFlex 523	400/480 V class	17 A	Approx. 7.5–11 kW	Approx. 180 × 100 × 200 mm	Approx. 2–3 kg
20F1ANC030JA0NNNNN	PowerFlex 753	400/480 V class	30 A class	Approx. 15–22 kW	Approx. 300 × 200 × 250 mm class	Approx. 15–20 kg

These models are much smaller than the 20G1G3C750LNDNNNNN.

They are included because they represent commonly used drive platforms for smaller motor applications.

The dimensions and weights shown for the smaller models are approximate because the respective product families include multiple frame sizes and configuration options.

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26. Difference Between PowerFlex 755TL and Smaller Drive Families

The difference between the C750 model and a compact drive is not simply a difference in horsepower.

The complete installation philosophy is different.

Characteristic	Compact Drive	20G1G3C750LNDNNNNN
Typical Motor Power	Small/medium	Approx. 400 kW normal duty
Current	Low/medium	750 A
Physical Size	Compact	Approx. 1.2 m × 0.675 m × 2.132 m
Weight	Several kg	Approx. 861.8 kg
Mounting	Panel or machine	Floor mounted
Cooling	Compact	Forced air
Input Technology	Application dependent	Low-harmonic AFE
Control	Basic to advanced	Advanced TotalFORCE
Installation	Machine cabinet	Industrial electrical room
Application	Machines and smaller systems	Large process equipment

This difference is important when considering the model for an industrial project.

The C750 should be viewed as a high-power industrial drive system rather than a simple panel-mounted inverter.

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27. Importance of the 750 A Rating

The 750 A rating is one of the defining characteristics of the model.

It should not be confused with a 750 kW power rating.

At 400 VAC, the normal-duty power class is approximately 400 kW.

The actual motor power that can be controlled depends on the motor current, power factor, efficiency, application duty, and drive configuration.

For this reason, motor nameplate current is generally more useful than motor kW alone when determining whether the drive is correctly sized.

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28. Light-Duty, Normal-Duty and Heavy-Duty Operation

The drive’s power capability changes according to the required duty.

Light-Duty Operation

Light-duty applications generally have lower overload demands.

The C750 configuration is associated with approximately 450 kW / 796 A light-duty capability.

Normal-Duty Operation

The principal rating is approximately:

750 A / 400 kW

This is the normal-duty rating most commonly associated with the C750 model.

Heavy-Duty Operation

For applications requiring greater overload capability, the heavy-duty power class is approximately:

315 kW / 585 A

This distinction can be particularly important for conveyors, compressors, crushers, mixers, and other demanding constant-torque equipment.

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29. Energy Efficiency and Variable-Speed Operation

One important reason for using a variable frequency drive is to match motor speed to actual process requirements.

This can be especially useful for centrifugal pumps and fans.

For example, a fan may not need to operate at maximum speed throughout the entire production cycle.

A pump may need lower flow during periods of reduced demand.

By adjusting motor speed instead of continuously operating the motor at full speed, the drive can potentially reduce energy consumption.

The actual savings depend on the application, operating schedule, motor characteristics, system resistance, and control strategy.

The drive should therefore be considered as one part of a complete energy-management system.

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30. Benefits for Large Industrial Plants

The PowerFlex 755TL becomes particularly useful when a plant has several large motors.

A large production facility may contain:

• Large pumps.
• Multiple process fans.
• Compressors.
• Conveyors.
• Cooling systems.
• Material-handling equipment.
• Water systems.
• Process machinery.

When several large VFDs operate simultaneously, electrical power quality becomes increasingly important.

The low-harmonic architecture of the 755TL is designed for precisely this type of environment.

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31. Benefits for Process Control

The drive can also improve the flexibility of the production process.

Instead of a motor having only two operating states—on and off—the motor can operate over a controlled speed range.

This allows the process to respond to:

• Flow demand.
• Pressure.
• Temperature.
• Production rate.
• Material volume.
• Airflow.
• Conveyor speed.
• Machine load.
• Process feedback.

This type of control is particularly valuable in modern industrial automation systems.

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32. Benefits for Mechanical Equipment

Variable-speed operation can also reduce mechanical stress.

Controlled acceleration means that the motor does not necessarily need to apply full acceleration torque instantaneously.

This can reduce stress on:

• Gearboxes.
• Couplings.
• Belts.
• Conveyor systems.
• Pumps.
• Fans.
• Shafts.
• Bearings.
• Mechanical structures.

Controlled deceleration can provide similar benefits.

The exact mechanical effect depends on the machine design and control parameters.

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33. Maintenance and Reliability Considerations

A high-power drive represents a significant investment in an industrial system.

Regular maintenance is therefore important.

A practical maintenance program should monitor:

• Cooling system condition.
• Fan operation.
• Airflow.
• Electrical connections.
• Cabinet cleanliness.
• Operating temperature.
• Alarm history.
• Fault history.
• Motor current.
• Output frequency.
• Load conditions.
• Communication status.
• Grounding.

Early detection of abnormal operating conditions can help avoid unexpected shutdowns.

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34. Selection Checklist

Before selecting the 20G1G3C750LNDNNNNN for a specific motor, the following points should be checked.

Selection Parameter	What Should Be Checked
Model	20G1G3C750LNDNNNNN
Motor Voltage	Compatible with 400 VAC drive system
Motor Current	Must be within applicable drive rating
Motor Power	Approximately 400 kW normal-duty class
Motor Frequency	Confirm 50/60 Hz application
Load Type	Variable torque / constant torque / other
Overload	Confirm actual requirement
Acceleration	Check mechanical inertia
Deceleration	Check stopping requirements
Braking	Confirm whether additional braking is necessary
Ambient Temperature	Verify operating range
Altitude	Check applicable derating
Cooling	Confirm adequate forced-air ventilation
Harmonics	Evaluate plant power-quality requirements
Cable Length	Check motor-cable requirements
Feedback	Confirm encoder/feedback requirements
Communication	Confirm required network
Safety	Confirm application safety requirements
Physical Space	Allow adequate equipment and service clearance
Floor Loading	Allow for approximately 861.8 kg basic weight

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35. Overall Product Position

The Allen-Bradley 20G1G3C750LNDNNN is positioned toward the high-power end of the 400 V PowerFlex 755TL range.

Its principal characteristics are:

• 400 VAC three-phase input.
• 750 A normal-duty current.
• Approximately 400 kW normal-duty rating.
• Approximately 450 kW light-duty rating.
• Approximately 315 kW heavy-duty rating.
• Frame 8 construction.
• Forced-air cooling.
• IP21 / UL Type 1 floor-mounted construction.
• Low-harmonic active-front-end technology.
• TotalFORCE control.
• Approximately 1,200 × 675 × 2,132 mm basic physical envelope.
• Approximately 861.8 kg basic weight.

These characteristics make it suitable for large industrial motor applications where both motor control and electrical power quality are important.

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36. Final Technical Parameter Table

Category	20G1G3C750LNDNNNNN
Model	20G1G3C750LNDNNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 755T
Product Series	PowerFlex 755TL
Product Type	Low-Harmonic AC Drive
Input Voltage	400 VAC
Input Phase	Three-phase
Normal-Duty Current	750 A
Normal-Duty Power	Approx. 400 kW
Light-Duty Power	Approx. 450 kW
Heavy-Duty Power	Approx. 315 kW
Frame Size	Frame 8
Cooling	Forced Air
Enclosure	IP21 / UL Type 1
Mounting	Floor Mount
Input Technology	Low-Harmonic Active Front End
Control	TotalFORCE
Standard EMI Protection	Yes
Dynamic Braking	None as standard
Width	Approx. 1,200 mm
Depth	Approx. 675 mm
Height	Approx. 2,132 mm
Weight	Approx. 861.8 kg
Typical Applications	Pumps, fans, blowers, compressors, conveyors, mining, water treatment, process equipment
Main Advantage	High-power motor control with low-harmonic input characteristics

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37. Final Summary

The Allen-Bradley 20G1G3C750LNDNNNNN is a high-power PowerFlex 755TL low-harmonic AC drive designed for large 400 V three-phase industrial motor applications.

Its 750 A normal-duty current rating and approximately 400 kW normal-duty power capability make it suitable for large pumps, fans, blowers, compressors, conveyors, mining equipment, water-treatment systems, material-handling equipment, and large process machinery.

The most distinctive characteristic of this model is its low-harmonic active-front-end architecture.

This design is particularly valuable in large industrial facilities where several high-power drives operate simultaneously and where electrical power quality is an important consideration.

The drive also benefits from the TotalFORCE control platform, providing advanced speed and torque control together with monitoring, diagnostics, feedback, and industrial automation integration capabilities.

Its physical construction reflects its power level.

The approximate dimensions are:

1,200 mm × 675 mm × 2,132 mm

and the approximate basic weight is:

861.8 kg.

This means that transportation, floor loading, lifting, ventilation, cable routing, maintenance access, and service space should all be considered during project planning.

For a large industrial system, the 20G1G3C750LNDNNNNN is best viewed as a complete high-power motor-control platform rather than simply a larger version of a compact VFD.

Its combination of 750 A current capacity, approximately 400 kW normal-duty power, low-harmonic input technology, advanced TotalFORCE control, industrial diagnostics, and large-frame construction makes it suitable for demanding variable-speed motor applications.

When selecting this model for an actual installation, the final decision should be based on the motor nameplate current, motor voltage, load characteristics, overload requirements, acceleration and deceleration requirements, braking requirements, environmental conditions, electrical-system characteristics, harmonic requirements, cable installation, feedback requirements, and automation architecture.