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Allen-Bradley 20G1F3D1K3LNDNNNNN PowerFlex 755 AC Drive
1. Product Introduction
The Allen-Bradley 20G1F3D1K3LNDNNNNN is a high-power air-cooled AC drive from the PowerFlex 755 series. It is designed for large industrial motor applications where substantial motor current, reliable speed control, controlled acceleration and deceleration, and continuous operation are required.
The model is identified as an air-cooled PowerFlex 755 AC packaged drive and is associated with the 480 VAC, three-phase class of industrial variable-frequency drives. The product listing identifies the model as an AC drive and specifically describes it as an air-cooled 755 AC packaged drive.
This is not a small machine-level inverter intended for compact equipment. It belongs to the large-frame industrial drive category and is intended for substantial motors and high-power mechanical systems.
The model number 20G1F3D1K3LNDNNNNN is particularly suited to applications where a high-current drive is required and where the electrical and mechanical installation is designed around a large industrial VFD.
The PowerFlex 755 family is widely associated with demanding applications such as conveyors, pumps, fans, compressors, material-handling machinery, process equipment, mining systems, cement equipment, and other large rotating machinery.
2. Brand
Brand: Allen-Bradley
Allen-Bradley is the brand associated with this product family.
The product identification for 20G1F3D1K3LNDNNNNN is consistently shown under the Allen-Bradley brand and as a PowerFlex 755 AC drive.
For purchasing, engineering documentation, spare-parts identification, and maintenance records, the complete catalog number should be retained because PowerFlex products can have very similar-looking model numbers with substantially different voltage, current, frame, enclosure, and configuration characteristics.
3. Product Series
Series: PowerFlex 755
The 20G1F3D1K3LNDNNNNN belongs to the PowerFlex 755 family.
The PowerFlex 755 family contains a broad range of industrial AC drives with different voltage classes, current ratings, frame sizes, cooling arrangements, enclosure configurations, and option combinations.
The exact catalog number 20G1F3D1K3LNDNNNNN is listed specifically as a PowerFlex 755 AC drive.
4. Basic Product Parameters
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Product Type | AC Variable Frequency Drive |
| Product Configuration | Air-Cooled 755 AC Packaged Drive |
| Model | 20G1F3D1K3LNDNNNNN |
| Input Voltage Class | 480 VAC |
| Input Phase | 3 Phase |
| Cooling | Air Cooled |
| Drive Class | High-Power Industrial AC Drive |
| Installation | Industrial / Floor-Mounted Large-Drive Application |
| Application Category | General-Purpose Industrial Motor Control |
| Drive Architecture | PowerFlex 755 |
| Regenerative Configuration | Associated with regenerative/AFE configurations in this product class; exact installed configuration should be confirmed from the nameplate |
| Dimensions | Approx. 2477 × 1200 × 800 mm, Frame 9-family reference; verify final mechanical drawing |
| Weight | Approx. 1287 kg, Frame 9-family reference; verify final shipping and installation documentation |
The exact model is documented as an air-cooled 755 AC packaged drive and is associated with the 480 VAC general-purpose VFD category.
The dimensions and weight shown above should be treated as a large-frame family reference rather than a guaranteed shipping dimension or exact net weight for every packaged configuration. Large PowerFlex 755 installations can change mechanically depending on enclosure, options, packaging, and cabinet arrangement.
For an actual project, the final mechanical drawing and product nameplate should always take precedence over a catalog-family reference.
5. Detailed Model Identification
The model number 20G1F3D1K3LNDNNNNN contains configuration information that distinguishes it from other PowerFlex 755 models.
The first important point is the 20G family designation, which identifies the PowerFlex 755 product family.
The following configuration characters identify the particular electrical and mechanical arrangement. Because PowerFlex catalog numbers can encode several configuration elements, the complete model number should be used rather than shortening the catalog number during procurement.
This is especially important when replacing an existing drive.
For example, the following PowerFlex 755 models are separately listed in the same family:
- 20G1F3D1K1LNDNNNNN
- 20G1F3D1K3LNDNNNNN
- 20G1F3D1K4LNDNNNNN
- 20G1F3D1K6LNDNNNNN
- 20G1F3D2K0LNDNNNNN
These are not interchangeable simply because they look similar. The electrical ratings and configuration must be checked against the motor and application requirements.
6. Electrical Characteristics
The 20G1F3D1K3LNDNNNNN is a 480 VAC-class three-phase AC drive.
The 480 VAC class makes it suitable for industrial electrical systems commonly used for large motors and process equipment.
A large industrial drive of this type normally receives three-phase AC power, processes the incoming electrical energy through its power-conversion section, and supplies controlled-frequency and controlled-voltage output to the motor.
This allows the motor to operate at controlled speeds rather than being restricted to direct-on-line operation.
The drive can therefore be used to control acceleration, deceleration, operating speed, and motor torque according to the requirements of the machine.
7. Main Technical Specification Table
| Parameter | 20G1F3D1K3LNDNNNNN Specification |
|---|---|
| Model | 20G1F3D1K3LNDNNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Drive Type | AC Variable Frequency Drive |
| Configuration | Air-Cooled 755 AC Packaged Drive |
| Input Voltage | 480 VAC class |
| Input Power System | Three-phase |
| Cooling Method | Air cooled |
| Installation Category | Industrial high-power drive |
| Application | General-purpose variable-speed motor control |
| Enclosure / Mechanical Configuration | Large industrial drive configuration |
| Frame | Large-frame PowerFlex 755 configuration; final frame arrangement to be confirmed from documentation |
| Dimensions | Approx. 2477 × 1200 × 800 mm, family reference |
| Weight | Approx. 1287 kg, family reference |
The product is explicitly identified in available product listings as an Air Cooled 755 AC Packaged Drive.
8. High-Power Industrial Design
One of the most important characteristics of this model is that it belongs to the large PowerFlex 755 drive category.
Large industrial motors can require very high starting current when connected directly to the supply. A properly selected VFD can significantly change the way the motor is started and operated.
Instead of simply connecting the motor directly to the electrical supply, the drive controls the electrical output delivered to the motor.
This makes the drive particularly useful when the machine requires controlled acceleration, controlled deceleration, adjustable operating speed, or process-based speed regulation.
For large mechanical systems, these functions can be just as important as the motor’s rated power.
9. Air-Cooled Construction
The 20G1F3D1K3LNDNNNNN is identified as an air-cooled packaged drive.
Air cooling is an important consideration for large industrial installations because the drive produces heat during operation.
The installation area therefore needs adequate ventilation and sufficient clearance for cooling airflow.
The electrical room or drive cabinet should not be treated simply as a location for mounting the equipment. Air temperature, airflow, dust, humidity, heat accumulation, and maintenance access can all affect long-term operating conditions.
For heavy industrial environments, the ventilation system should be designed around the actual heat generated by the complete drive installation rather than relying only on natural room ventilation.
10. Mechanical Size and Weight
The physical size of a drive in this power class is considerably larger than that of a small machine-mounted VFD.
For planning purposes, a large-frame reference of approximately:
Height: 2477 mm
Width: 1200 mm
Depth: 800 mm
Weight: approximately 1287 kg
can be used as a preliminary engineering reference.
These values should not be treated as a substitute for the final mechanical drawing.
The actual delivered equipment can vary depending on the selected cabinet, options, enclosure construction, line-side equipment, disconnect arrangements, braking equipment, harmonic equipment, and other packaged-drive requirements.
11. Mechanical Installation Requirements
Because of its size and weight, this type of drive requires substantially more installation planning than a small VFD.
The floor must be capable of supporting the equipment.
The transportation route should be checked before delivery.
Door openings, elevators, ramps, lifting points, structural beams, floor loading, and access routes may all need to be reviewed.
A large drive should also have enough clearance for maintenance personnel to inspect power connections, cooling equipment, control components, and other internal components.
The approximate dimensions and weight given in this document are therefore best used during preliminary planning only.
12. Motor Control Applications
The main purpose of the 20G1F3D1K3LNDNNNNN is variable-speed control of large industrial motors.
Typical applications include:
- Large conveyors
- Mining conveyors
- Crushers
- Fans
- Large pumps
- Process pumps
- Cooling-water systems
- Compressors
- Blowers
- Cement machinery
- Aggregate processing equipment
- Material-handling systems
- Steel-processing machinery
- Large production machines
- Industrial process equipment
The PowerFlex 755 family has numerous catalog configurations covering different current and voltage requirements, making it suitable for a wide range of industrial motor-control systems.
13. Conveyor Applications
Large conveyors are one of the applications where a high-power AC drive can be particularly useful.
A conveyor may need to start with a loaded belt.
Starting a heavily loaded conveyor directly across the line can result in high starting current and significant mechanical stress.
A properly configured VFD allows the conveyor to accelerate in a controlled manner.
This can reduce sudden mechanical loading on gearboxes, couplings, belts, shafts, and other mechanical components.
Speed control can also be useful when the material flow varies during production.
For long conveyors, the ability to control acceleration and deceleration is particularly valuable because the mechanical system can have substantial inertia.
14. Mining Applications
Mining equipment often operates under severe mechanical and environmental conditions.
Large conveyors, crushers, pumps, fans, hoists, and material-handling equipment can require high-capacity motor drives.
The PowerFlex 755 architecture is appropriate for applications where a large motor needs controlled variable-speed operation.
For a mining conveyor, the drive can be incorporated into a larger control system that coordinates motor speed with material flow.
For crushing equipment, variable-speed operation can help the machine adapt to process requirements.
For large ventilation fans and pumps, speed control can also provide process flexibility.
The final suitability of the drive for a particular mining installation depends on the motor data, site environment, enclosure requirements, cable system, protection system, and local electrical standards.
15. Pump Applications
Large pumps frequently operate for long periods and may not need to run continuously at maximum speed.
A variable-frequency drive can regulate motor speed according to process demand.
This is useful for:
- Water transfer pumps
- Cooling-water pumps
- Process pumps
- Wastewater pumps
- Industrial circulation pumps
- Large irrigation systems
- Chemical-process pumps
- Raw-water pumps
The practical benefit is that motor speed can become a controllable process variable rather than remaining fixed.
However, the drive should always be selected together with the pump curve, motor rating, required operating range, minimum safe speed, starting requirements, and system pressure requirements.
16. Fan and Blower Applications
Large fans and blowers are another important application category.
Industrial ventilation systems often require variable airflow.
Instead of using mechanical dampers to continuously restrict a fan operating at full speed, a VFD can adjust motor speed to match the process requirement.
Applications can include:
- Industrial exhaust fans
- Furnace fans
- Mine ventilation fans
- Dust-collection fans
- Cement-plant fans
- Cooling fans
- Combustion-air fans
- Process blowers
For large fans, acceleration and deceleration control can also help prevent sudden mechanical loading.
17. Compressor Applications
Compressors can have substantial starting torque and inertia.
A properly selected large AC drive can provide controlled starting and variable-speed operation.
Typical applications include industrial air compressors, process compressors, refrigeration-related machinery, and large gas-handling systems.
The final drive selection must consider the compressor type because centrifugal, screw, reciprocating, and other compressor designs have different operating characteristics.
18. Cement and Aggregate Applications
Cement plants contain numerous high-power rotating machines.
Examples include:
- Crushers
- Raw-material conveyors
- Kiln-related equipment
- Large fans
- Blowers
- Pumps
- Mills
- Material-handling systems
- Dust-collection systems
- Aggregate conveyors
The 20G1F3D1K3LNDNNNNN is suitable for consideration in this type of high-power industrial environment when its electrical rating and environmental configuration match the application.
19. Steel and Metal Processing Applications
Steel and metal-processing plants frequently use large motors for conveyors, fans, pumps, rolling-related machinery, material-handling equipment, and process systems.
A high-power variable-frequency drive provides a method of controlling motor speed and acceleration without relying solely on mechanical control methods.
This can be particularly useful where the production process requires different operating speeds.
The drive can also be integrated into a broader automation system so that speed commands can be generated by the process-control system.
20. Material-Handling Applications
Material-handling equipment often benefits from controlled motor acceleration.
Examples include:
- Large belt conveyors
- Transfer conveyors
- Bucket elevators
- Heavy-duty feeders
- Bulk-material handling systems
- Storage and reclaim systems
- Industrial lifting-related machinery
- Large processing conveyors
The appropriate control strategy depends on the mechanical system.
A conveyor with high inertia may require a carefully configured acceleration and deceleration profile.
A system with an overhauling load may require additional consideration of regenerative energy.
21. Regenerative and High-Inertia Applications
PowerFlex 755 configurations can be used in applications involving regenerative energy, depending on the exact hardware and configuration.
Regeneration becomes important when the motor is driven by the mechanical load rather than driving the load.
Examples can include:
- Downhill conveyors
- High-inertia deceleration
- Certain hoisting systems
- Overhauling machinery
- Rapid deceleration of large rotating masses
In these applications, the mechanical system can return energy toward the drive.
The exact regenerative arrangement must be confirmed from the complete catalog number and installed power architecture.
It should not be assumed that every PowerFlex 755 catalog number contains the same regenerative hardware.
22. Main Product Advantages
High-Power Motor Control
The first major advantage is its suitability for large industrial motors.
The PowerFlex 755 platform is designed around demanding industrial applications rather than small standalone equipment.
Controlled Acceleration
A VFD allows acceleration to be programmed rather than simply applying full line voltage to a stationary motor.
This can help reduce mechanical shock.
Controlled Deceleration
The same principle applies during stopping.
The motor can be decelerated according to the programmed operating requirements.
For large rotating equipment, controlled deceleration can be particularly important because of stored mechanical energy.
Variable-Speed Operation
The machine can operate at different speeds according to production requirements.
This is useful for pumps, fans, conveyors, compressors, and process machinery.
Large Industrial Platform
The PowerFlex 755 family contains numerous high-power catalog configurations.
This allows engineers to select a model appropriate to the motor current and system voltage rather than forcing every application into the same drive size.
Air-Cooled Architecture
Air cooling can be practical for large industrial installations where a properly engineered ventilation system is available.
The design avoids the need for a dedicated liquid-cooling loop for the basic drive cooling arrangement.
Packaged-Drive Configuration
The catalog description identifies this model as an air-cooled packaged drive.
This is useful for projects where the drive forms part of a larger industrial electrical installation rather than being treated as a small component mounted directly inside a machine.
23. Important Selection Considerations
The model number alone should never be used as the only selection criterion.
Before replacing or specifying the drive, engineers should confirm:
- Motor rated voltage.
- Motor rated current.
- Motor rated power.
- Normal-duty requirements.
- Heavy-duty requirements.
- Starting torque.
- Maximum operating speed.
- Minimum operating speed.
- Acceleration time.
- Deceleration time.
- Load inertia.
- Ambient temperature.
- Altitude.
- Cooling-air requirements.
- Enclosure requirements.
- Harmonic requirements.
- Regenerative requirements.
- Motor cable length.
- Motor insulation system.
- Control-system communication requirements.
24. Installation Environment
Large industrial drives should be installed in an environment compatible with their enclosure and cooling design.
Dust is particularly important.
Mining, cement, aggregate, and similar industries can produce large quantities of airborne dust.
Dust accumulation can interfere with airflow and increase maintenance requirements.
Temperature is another important consideration.
If the electrical room becomes excessively hot, the drive’s thermal operating margin can be reduced.
Adequate ventilation or air conditioning may therefore be required.
25. Maintenance Considerations
Maintenance of a large AC drive should include regular inspection of:
- Cooling airflow
- Fans
- Air filters where applicable
- Power connections
- Grounding connections
- Control wiring
- Cabinet cleanliness
- Signs of overheating
- Loose connections
- Abnormal noise
- Abnormal vibration
- Cooling-system performance
The exact maintenance interval should be established according to the installation environment and the manufacturer’s maintenance requirements.
A drive operating in a clean electrical room may have significantly different maintenance requirements from one installed near a cement mill or mining conveyor.
26. Recommended Same-Series / Related Models
The following five models are closely related PowerFlex 755 configurations and are useful reference points when evaluating alternatives.
These models appear within the same PowerFlex 755 catalog family.
| Model | Series | General Configuration | Voltage Class | Cooling | Application Position | Dimensions | Weight |
|---|---|---|---|---|---|---|---|
| 20G1F3D1K1LNDNNNNN | PowerFlex 755 | Air-Cooled AC Packaged Drive | 480 VAC class | Air cooled | Closely related lower-current configuration | Approx. 2477 × 1200 × 800 mm* | Approx. 1287 kg* |
| 20G1F3D1K3LNDNNNNN | PowerFlex 755 | Air-Cooled AC Packaged Drive | 480 VAC class | Air cooled | Target model | Approx. 2477 × 1200 × 800 mm* | Approx. 1287 kg* |
| 20G1F3D1K4LNDNNNNN | PowerFlex 755 | Air-Cooled AC Drive | 480 VAC class | Air cooled | Closely related higher-capacity configuration | Approx. 2477 × 1200 × 800 mm* | Approx. 1287 kg* |
| 20G1F3D1K6LNDNNNNN | PowerFlex 755 | Air-Cooled AC Drive | 480 VAC class | Air cooled | Related high-power configuration | Approx. 2477 × 1200 × 800 mm* | Approx. 1287 kg* |
| 20G1F3D2K0LNDNNNNN | PowerFlex 755 | Air-Cooled AC Drive | 480 VAC class | Air cooled | Related larger-current configuration | Approx. 2477 × 1200 × 800 mm* | Approx. 1287 kg* |
*Dimensions and weight are large-frame family planning references, not guaranteed exact values for every catalog configuration. Final mechanical drawings and shipping documentation should be used for procurement and installation.
The related catalog numbers are documented within the PowerFlex 755 family listings.
27. Same-Series Comparison
The most useful reason to compare the related models is that the catalog numbers are very similar while the actual electrical capabilities can be different.
For a replacement project, the engineer should not simply select the model with the closest-looking number.
The correct procedure is to compare the motor current requirement with the drive’s applicable current rating.
The motor’s normal operating current should be compared with the appropriate drive rating.
If the machine has high starting torque, frequent acceleration, high inertia, or overload requirements, the heavy-duty rating also needs to be considered.
28. Five Same-Brand Reference Models
The following are useful same-brand reference models for comparison across the broader Allen-Bradley PowerFlex product range.
They are presented as reference models rather than a ranking of popularity, because actual market demand varies by region, industry, and application.
| Model | Brand | Series / Product Family | General Product Type | Voltage / Application Class | Cooling | Dimensions | Weight |
|---|---|---|---|---|---|---|---|
| 20G1F3D960LNDNNNNN | Allen-Bradley | PowerFlex 755 | High-Power AC Drive | 480 VAC class | Air cooled | Approx. large-frame configuration | Approx. 1000+ kg class* |
| 20G1F3D1K1LNDNNNNN | Allen-Bradley | PowerFlex 755 | High-Power AC Drive | 480 VAC class | Air cooled | Approx. 2477 × 1200 × 800 mm* | Approx. 1287 kg* |
| 20G1F3D2K0LNDNNNNN | Allen-Bradley | PowerFlex 755 | High-Power AC Drive | 480 VAC class | Air cooled | Approx. large-frame configuration | Approx. 1000+ kg class* |
| 20G1F3D302LNDNNNNN | Allen-Bradley | PowerFlex 755 | High-Power AC Drive | 480 VAC class | Air cooled | Configuration dependent | Configuration dependent |
| 20F1AGD302AN0NNNNN | Allen-Bradley | PowerFlex 753 | Air-Cooled AC Drive | Industrial AC drive class | Air cooled | Configuration dependent | Configuration dependent |
*The dimensions and weights in this comparison are preliminary engineering references. Exact mechanical dimensions and net weights vary according to frame, enclosure, options, and packaged configuration.
The PowerFlex 755 catalog listings contain multiple configurations covering current classes from several hundred amperes through very large industrial ratings, while PowerFlex 753 provides another reference point within the same broad product family.
29. Why the 20G1F3D1K3LNDNNNNN Is Used for Large Systems
The main reason to consider a model of this type is not simply motor speed control.
The real value comes from combining high-power motor control with a programmable industrial control platform.
Large machines often have multiple operating conditions.
For example, a conveyor may need a slow speed during inspection and a higher speed during normal production.
A pump may need different speeds depending on process demand.
A fan may need to respond to pressure or airflow requirements.
A compressor may need speed regulation to coordinate with the rest of the plant.
A large AC drive provides a common control platform for these types of operating requirements.
30. Application in Large Conveyor Systems
For a large conveyor, the drive can be used to manage the complete motor operating profile.
A typical operating sequence can include:
Standby → Pre-start → Controlled acceleration → Normal running → Speed adjustment → Controlled deceleration → Stop
The acceleration ramp can be configured to reduce sudden mechanical loading.
The deceleration ramp can be configured according to the mechanical characteristics of the conveyor.
For very long conveyors, system engineering should also consider belt tension, gearbox characteristics, load distribution, mechanical resonance, and regenerative energy.
31. Application in Large Pumping Systems
For large pumps, the drive can be used to match motor speed to process demand.
A typical system may use pressure, flow, level, or another process variable as the control reference.
The automation system can then adjust the drive speed according to the process requirement.
This can provide much finer control than simply switching the pump fully on or fully off.
However, pump manufacturers’ minimum-speed and operating-range requirements must always be respected.
32. Application in Large Fan Systems
Fan systems can benefit from variable-speed operation because airflow requirements frequently change.
Instead of operating the motor continuously at one fixed speed, the drive can adjust the speed according to the process.
This is especially useful in:
- Industrial ventilation
- Furnace systems
- Dust collection
- Mine ventilation
- Cement plants
- Steel plants
- Process cooling
Large fans can also have considerable rotational inertia, so controlled acceleration and deceleration can be important.
33. Application in Crushers
Crushers can place significant mechanical demands on a drive system.
The motor may need to accelerate a large rotating mass.
The drive selection therefore needs to consider starting torque, overload requirements, acceleration time, mechanical inertia, and the crusher manufacturer’s motor requirements.
A PowerFlex 755 configuration can be considered where controlled variable-speed operation is required.
34. Application in Cement Plants
Cement production contains numerous large motors.
A high-power drive such as 20G1F3D1K3LNDNNNNN can be considered for applications such as:
- Large fans
- Blowers
- Conveyors
- Pumps
- Material-handling systems
- Crushers
- Grinding-related equipment
- Dust-control systems
The actual suitability depends on the motor current and application duty.
35. Application in Mining Plants
Mining applications can be especially demanding because equipment may operate continuously and under heavy loads.
Typical applications include:
- Ore conveyors
- Crushers
- Screens
- Pumps
- Fans
- Material feeders
- Bulk-material handling
The drive installation should be matched to the site’s temperature, altitude, dust, humidity, enclosure, and maintenance requirements.
36. Application in Water and Wastewater
Large water systems often use high-power pumps.
The drive can be integrated with the plant’s automation system to regulate pump speed.
Typical applications include:
- Raw-water pumping
- Water-transfer systems
- Wastewater pumping
- Industrial water circulation
- Cooling-water systems
- Large treatment-plant pumps
For these applications, process control and pump-system design are just as important as the electrical drive itself.
37. Application in Steel and Metals
Large steel and metal-processing plants may require variable-speed motors for:
- Conveyors
- Cooling systems
- Pumps
- Fans
- Blowers
- Material handling
- Production machinery
The drive can provide a controllable speed reference and can be integrated into a plant-wide automation system.
38. Application in High-Inertia Machinery
High-inertia machinery is an important category for large VFDs.
Examples include:
- Large fans
- Flywheel-driven machinery
- Crushers
- Mills
- Large blowers
- Centrifugal machinery
- Heavy conveyors
When these machines accelerate or decelerate, considerable energy can be involved.
The drive system therefore needs to be selected according to the mechanical inertia and the desired acceleration/deceleration time.
39. Electrical Room Planning
A drive of this size should be incorporated into the electrical-room design from the beginning.
Important considerations include:
- Incoming power arrangement
- Short-circuit protection
- Grounding
- Cable routing
- Motor cable routing
- Ventilation
- Heat dissipation
- Maintenance clearance
- Access doors
- Lifting equipment
- Floor loading
- Fire protection
- Environmental conditions
The approximate physical reference of 2477 × 1200 × 800 mm and approximately 1287 kg demonstrates why mechanical planning is important for this class of equipment.
40. Transportation and Handling
At approximately 1287 kg as a family-level planning reference, this is not equipment that should be treated like a conventional wall-mounted VFD.
Transportation should be planned before delivery.
The engineering team should verify:
- Delivery vehicle requirements
- Unloading method
- Forklift or crane capacity
- Lifting points
- Floor loading
- Door dimensions
- Building access
- Final installation position
- Maintenance access
The exact packaged weight should be obtained from the final shipping documentation before transportation.
41. Replacement and Spare-Drive Planning
When this model is being purchased as a replacement, the complete catalog number should be recorded.
The replacement evaluation should compare:
Old model → New model
and should include:
- Voltage
- Current
- Power rating
- Duty rating
- Frame
- Cooling method
- Enclosure
- Control options
- Communication options
- Braking arrangement
- Regenerative configuration
- Input configuration
- Output configuration
- Motor compatibility
A model that looks similar externally may not be electrically equivalent.
42. Practical Advantages for Industrial Plants
The 20G1F3D1K3LNDNNNNN offers several practical advantages when correctly matched to a large industrial motor.
First, it provides variable-speed operation.
Second, it allows controlled acceleration and deceleration.
Third, it is designed for large industrial installations.
Fourth, its air-cooled construction is suitable for installations where an engineered air-cooling environment is available.
Fifth, it belongs to the PowerFlex 755 family, providing access to a broad range of related drive configurations.
The family catalog contains many closely related models, which can simplify engineering standardization across a plant with multiple drive sizes.
43. Detailed Final Parameter Table
| Parameter | Detailed Specification |
|---|---|
| Model | 20G1F3D1K3LNDNNNNN |
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Series | PowerFlex 755 |
| Product Category | AC Variable Frequency Drive |
| Product Description | Air-Cooled 755 AC Packaged Drive |
| Input Voltage Class | 480 VAC |
| Input Phase | Three-phase |
| Cooling | Air cooled |
| Drive Application | Industrial variable-speed motor control |
| Installation Type | Large industrial / floor-mounted configuration |
| Motor Application | Large AC induction and compatible industrial motor applications |
| Typical Industries | Mining, cement, aggregate, water, steel, material handling, process industries |
| Conveyor Application | Yes |
| Pump Application | Yes |
| Fan Application | Yes |
| Blower Application | Yes |
| Compressor Application | Yes, subject to compressor-specific requirements |
| Crusher Application | Yes, subject to motor and duty requirements |
| Regenerative Application | Possible with appropriate system configuration |
| Enclosure / Protection | Configuration dependent |
| Control System Integration | Industrial automation integration |
| Cooling-Air Requirement | Significant; installation ventilation must be engineered |
| Approx. Height | 2477 mm* |
| Approx. Width | 1200 mm* |
| Approx. Depth | 800 mm* |
| Approx. Weight | 1287 kg* |
| Mechanical Class | Large-frame industrial drive |
| Maintenance Requirement | Periodic inspection and cooling-system maintenance |
| Procurement Status | Listed by distributors as discontinued |
| Replacement Requirement | Verify complete catalog number and application before substitution |
*The dimensions and weight are presented as large-frame planning references. They should be verified against the exact mechanical drawing, enclosure configuration, option package, and shipping documentation before installation.
The exact model is currently listed by distributors as discontinued, so replacement or retrofit projects should pay particular attention to the exact catalog configuration and the availability of technically equivalent alternatives.
44. Recommended Model Selection Logic
If the application is already using the 20G1F3D1K3LNDNNNNN, the first replacement candidates should normally be evaluated from the same PowerFlex 755 family.
The five closely related models listed earlier provide useful comparison points.
The selection should be based primarily on electrical current, motor power, duty requirements, voltage, frame, enclosure, and options.
For a new project, it is also important to check whether the required control method is scalar V/Hz, sensorless vector, closed-loop vector, or another control architecture supported by the selected configuration.
45. Final Product Summary
The Allen-Bradley 20G1F3D1K3LNDNNNNN is a large industrial PowerFlex 755 AC drive configured as an air-cooled packaged drive.
It belongs to the 480 VAC three-phase industrial drive class and is intended for demanding variable-speed motor applications.
Its primary role is to provide controlled electrical power to large industrial motors while allowing the motor speed and operating profile to be adjusted according to the machine and process requirements.
The product is particularly relevant to large conveyors, pumps, fans, blowers, compressors, crushers, mining machinery, cement equipment, steel-processing equipment, water systems, and other heavy industrial applications.
Its major practical strengths are its large industrial architecture, variable-speed control capability, controlled acceleration and deceleration, air-cooled construction, and compatibility with the broader PowerFlex 755 family.
Because this is a large-frame drive, mechanical installation is an important part of the engineering process. A preliminary planning reference of approximately 2477 × 1200 × 800 mm and approximately 1287 kg illustrates the scale of the equipment, but the final mechanical drawing and shipping documentation should always be used for the actual project.
For procurement or replacement work, the complete catalog number 20G1F3D1K3LNDNNNNN should be retained exactly as written.
The closest same-series comparison models include 20G1F3D1K1LNDNNNNN, 20G1F3D1K4LNDNNNNN, 20G1F3D1K6LNDNNNNN, and 20G1F3D2K0LNDNNNNN, while other PowerFlex 755 configurations provide additional current and application options. These related catalog numbers are documented within the same product family.
In practical terms, the 20G1F3D1K3LNDNNNNN should be regarded as a large industrial motor-control platform rather than simply a conventional VFD. Its successful application depends on matching the electrical rating, motor characteristics, mechanical load, cooling environment, enclosure, installation method, and control requirements as one complete system.