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Allen-Bradley 20G1F3D1K0LNDNNNNN PowerFlex 755 AC Drive
1. Product Introduction
The Allen-Bradley 20G1F3D1K0LNDNNNNN is a high-power industrial AC variable frequency drive belonging to the PowerFlex 755 family.
It is an air-cooled, floor-mounted packaged drive intended for large three-phase AC motor applications where a conventional small or medium-size VFD is not sufficient.
This particular configuration is associated with a 480 V AC, three-phase power system, a Frame 9 mechanical platform, and a very high current capacity. The listed configuration provides approximately 1135 A light-duty, 1045 A normal-duty, and 960 A heavy-duty current capability, with the normal-duty and heavy-duty ratings corresponding to approximately 900 HP and 750 HP respectively.
The model is therefore positioned toward large industrial machinery rather than compact machine automation.
Typical installations can include large conveyors, mining equipment, crushers, large pumps, fans, blowers, compressors, process machinery, bulk-material handling systems, cement equipment, steel-processing equipment, and other high-power motor-driven systems.
The physical construction is also substantially larger than the smaller PowerFlex products. The Frame 9 platform uses a floor-mounted industrial cabinet arrangement, making electrical-room planning, ventilation, transportation, lifting, cable routing, and maintenance access important parts of the installation.
The complete catalog number should be retained when ordering, replacing, or comparing equipment. Individual characters within a PowerFlex catalog number can identify electrical, mechanical, filtering, braking, enclosure, display, and other configuration details, so a similar-looking catalog number should not automatically be treated as an interchangeable replacement.
2. Brand
| Item | Specification |
|---|---|
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Product Series | PowerFlex 755 |
| Product Type | AC Variable Frequency Drive |
| Drive Style | Packaged AC Drive |
| Cooling | Air Cooled |
| Installation | Floor Mounted |
| Voltage Class | 480 V AC |
| Phase | Three Phase |
| Current Class | 1135 A LD / 1045 A ND / 960 A HD |
| Frame | Frame 9 |
| Enclosure | Type 1 / IP21 class |
| Input Architecture | AFE Regenerative |
| Main Application | Large AC Motor Control |
| Control Category | Industrial Variable-Speed Drive |
The model is specifically listed as an Air Cooled 755 AC Packaged Drive, with a 480 V three-phase rating and Frame 9 construction.
3. Product Series
The 20G1F3D1K0LNDNNNNN belongs to the PowerFlex 755 series.
PowerFlex 755 drives are designed for demanding industrial applications in which the drive is part of a larger automation and motor-control system.
The series covers a wide range of current and voltage configurations, including large floor-mounted Frame 8, Frame 9, and Frame 10 products.
The 20G1F3D1K0LNDNNNNN represents one of the high-current 480 V configurations within this family.
Related catalog listings include 960 A, 1135 A, 1.0 kA-class and larger PowerFlex 755 configurations, demonstrating the wide range of high-power variants available within the series.
4. Basic Product Parameters
| Parameter | Specification |
|---|---|
| Model | 20G1F3D1K0LNDNNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Product Type | Air-Cooled AC Packaged Drive |
| Input Voltage | 480 V AC |
| Input Phase | Three Phase |
| Light-Duty Current | 1135 A |
| Normal-Duty Current | 1045 A |
| Heavy-Duty Current | 960 A |
| Light-Duty Motor Class | 1000 HP |
| Normal-Duty Motor Class | 900 HP |
| Heavy-Duty Motor Class | 750 HP |
| Cooling | Air Cooled |
| Mounting | Floor Mount |
| Frame | Frame 9 |
| Enclosure | Type 1 / IP21 |
| Input Configuration | AFE Regenerative |
| EMC Protection | Standard EMI configuration |
| HIM | Door-Mounted HIM |
| Dynamic Braking | Configuration indicates no dynamic braking |
| Application | Large Industrial AC Motors |
| Approx. Dimensions | 2453 × 1200 × 600/800 mm |
| Approx. Weight | 1246 kg |
| Cabinet Style | MCC-style floor-mounted cabinet |
The exact product listing identifies the model as a 480 VAC, three-phase, air-cooled, Frame 9 packaged drive with 1135 A LD, 1045 A ND, and 960 A HD ratings.
The Frame 9 dimensions and weight are based on the PowerFlex 755 Frame 9 MCC-style cabinet reference data. The standard IP20/Type 1 Frame 9 cabinet is approximately 2453 mm high and 1200 mm wide, with a 600 mm or 800 mm depth and an approximate weight of 1246 kg.
5. Detailed Electrical Specifications
| Electrical Parameter | Specification |
|---|---|
| Model | 20G1F3D1K0LNDNNNNN |
| Rated Voltage | 480 V AC |
| Voltage System | Three Phase |
| Light-Duty Current | 1135 A |
| Normal-Duty Current | 1045 A |
| Heavy-Duty Current | 960 A |
| Light-Duty Motor Rating | 1000 HP |
| Normal-Duty Motor Rating | 900 HP |
| Heavy-Duty Motor Rating | 750 HP |
| Input Frequency | 50/60 Hz system dependent |
| Output | Variable-frequency three-phase AC |
| Cooling | Forced Air |
| Frame | Frame 9 |
| Input Arrangement | AFE Regenerative |
| Drive Category | High-Power Industrial VFD |
| Mounting | Floor Mount |
| Enclosure | Type 1 / IP21 class |
| EMI / Filtering | Standard EMI protection configuration |
| HIM | Door-Mounted HIM |
| Dynamic Braking | None in identified configuration |
The three duty ratings are an important feature of the product.
The 1135 A light-duty rating allows the drive to be considered for applications where the motor experiences relatively moderate overload requirements.
The 1045 A normal-duty rating is the central rating for many continuous industrial applications.
The 960 A heavy-duty rating is relevant to applications with higher overload requirements, demanding acceleration, high starting torque, or substantial transient mechanical loading.
The product listing associates these current levels with 1000 HP light-duty, 900 HP normal-duty, and 750 HP heavy-duty applications.
6. Power Rating by Duty
| Duty | Current | Approx. Motor Rating | Typical Use |
|---|---|---|---|
| Light Duty | 1135 A | 1000 HP | Large variable-load applications |
| Normal Duty | 1045 A | 900 HP | General high-power industrial applications |
| Heavy Duty | 960 A | 750 HP | High-overload / high-torque applications |
The difference between these three ratings is important when selecting the drive.
A motor’s horsepower alone should not be used as the only selection criterion.
The motor nameplate current, motor voltage, application load profile, acceleration requirements, overload requirements, ambient conditions, altitude, and process duty should all be evaluated.
7. Approximate Power in kW
For reference, the horsepower values correspond approximately to the following metric power levels:
| Duty | Horsepower | Approximate Mechanical Power |
|---|---|---|
| Light Duty | 1000 HP | Approximately 746 kW |
| Normal Duty | 900 HP | Approximately 671 kW |
| Heavy Duty | 750 HP | Approximately 560 kW |
These are simple horsepower-to-kilowatt conversions and should not be confused with the drive’s actual electrical input power or motor efficiency.
The correct engineering selection should remain based on the drive rating table and motor nameplate current.
8. AFE Regenerative Configuration
A major characteristic of the identified configuration is its AFE regenerative architecture.
AFE stands for Active Front End.
In a conventional VFD, electrical energy normally flows from the AC supply through the drive to the motor.
In certain applications, however, the mechanical load can drive the motor.
When this occurs, the motor can operate as a generator and return electrical energy toward the drive.
A regenerative front-end arrangement can be designed to manage this returned energy and transfer it back toward the electrical supply.
This can be particularly useful in applications such as:
- Downhill conveyors
- Large hoists
- High-inertia machines
- Certain cranes
- Material-handling systems
- Test equipment
- Large rotating machinery
- Applications with frequent braking
Regeneration must be evaluated as part of the complete electrical system. The drive, incoming power system, grounding, protection, power quality, control system, motor, and mechanical load all need to be considered together.
9. Industrial Cabinet Construction
The 20G1F3D1K0LNDNNNNN is a large floor-mounted industrial drive.
Unlike a compact wall-mounted VFD, this type of equipment normally requires dedicated floor space.
The cabinet arrangement provides space for the large power section, cooling system, control components, electrical connections, protection equipment, and associated drive hardware.
At this current level, the physical installation is almost as important as the electrical rating.
The engineering team should consider:
- Floor loading
- Cabinet dimensions
- Door clearance
- Cable-entry arrangements
- Incoming power connections
- Motor cable routing
- Grounding
- Ventilation
- Heat rejection
- Maintenance access
- Lifting equipment
- Transportation route
10. Dimensions and Weight
The standard Frame 9 MCC-style cabinet reference is approximately 2453 mm high and 1200 mm wide.
The depth can be approximately 600 mm or 800 mm depending on the particular cabinet arrangement.
The approximate cabinet weight is 1246 kg.
| Mechanical Parameter | Frame 9 Reference |
|---|---|
| Model | 20G1F3D1K0LNDNNNNN |
| Frame | Frame 9 |
| Cabinet Height | Approx. 2453 mm |
| Cabinet Width | Approx. 1200 mm |
| Cabinet Depth | Approx. 600 or 800 mm |
| Approx. Weight | Approx. 1246 kg |
| Mounting | Floor Mount |
| Cabinet Style | MCC Style |
| Cooling | Air Cooled |
| Protection Reference | IP20 / Type 1 |
| Installation | Indoor Industrial Electrical Room |
| Shipping Weight | Configuration dependent |
| Final Installed Dimensions | Configuration dependent |
Published PowerFlex 755 mechanical data lists Frame 9 IP20/Type 1 MCC-style cabinets at approximately 2453 × 1200 × 600/800 mm with an approximate weight of 1246 kg.
For installations containing additional option cabinets, the total width and total weight can be considerably greater than the basic drive cabinet.
The same Frame 9 reference data indicates that a drive with additional option cabinets can reach approximately 1800 mm in width and approximately 2290 kg in total weight.
11. IP54 / Type 12 Frame 9 Reference
The broader PowerFlex 755 Frame 9 platform also has higher-protection cabinet configurations.
| Parameter | IP54 / Type 12 Frame 9 Reference |
|---|---|
| Model | 20G1F3D1K0LNDNNNNN |
| Frame | Frame 9 |
| Approx. Height | 2477 mm |
| Approx. Width | 1200 mm |
| Approx. Depth | 800 mm |
| Depth With Filter | Approximately 898 mm |
| Approx. Weight | 1287 kg |
| Cooling | Air Cooled |
| Installation | Floor Mount |
These figures represent the Frame 9 family mechanical reference rather than a guarantee that every complete suffix configuration uses the same enclosure arrangement.
12. Cooling System
The drive uses an air-cooled architecture.
At more than 900 A of current capacity, thermal management becomes a major engineering issue.
Large power semiconductors, bus structures, reactors, filters, and other electrical components generate heat during operation.
The cooling system therefore needs adequate airflow to maintain acceptable operating temperatures.
The installation environment should be evaluated for:
- Ambient temperature
- Airflow
- Room ventilation
- Dust
- Humidity
- Altitude
- Filter condition
- Fan condition
- Cabinet clearance
- Heat rejection
A drive room containing several large VFDs can produce a significant amount of heat.
The room ventilation system should therefore be sized according to the actual heat losses of all installed equipment rather than treating the VFD as an isolated device.
13. Main Applications
The 20G1F3D1K0LNDNNNNN is designed for high-power industrial motor applications.
Typical application areas include:
- Mining
- Mineral processing
- Cement production
- Aggregate processing
- Large conveyors
- Crushers
- Large pumps
- Large fans
- Blowers
- Compressors
- Steel processing
- Metal processing
- Material handling
- Water infrastructure
- Industrial process machinery
- High-inertia machinery
- Large ventilation systems
- Bulk-material systems
14. Mining Applications
Mining machinery frequently requires very large motors.
Large conveyors, crushers, ventilation fans, dewatering pumps, mills, and material-handling equipment can all require hundreds of kilowatts of motor power.
The 20G1F3D1K0LNDNNNNN is appropriate for this general application class when the motor current and environmental requirements are within its rating.
For conveyor systems, variable-speed control can make acceleration and deceleration considerably more controlled.
For crushers, variable-speed operation can help manage changing process conditions.
For mine ventilation, speed control can be used to adjust airflow according to process requirements.
For dewatering systems, variable-speed pump control can provide adjustable flow and pressure.
15. Large Conveyor Applications
Large conveyors can be particularly demanding because the mechanical system can contain a large amount of stored energy.
A heavily loaded belt may require substantial torque during acceleration.
Starting the motor too aggressively can place mechanical stress on:
- Gearboxes
- Couplings
- Shafts
- Pulleys
- Belts
- Bearings
- Mechanical joints
A high-power VFD can control the acceleration ramp and reduce abrupt changes in motor torque.
Variable-speed operation also allows the conveyor speed to be adjusted according to the material flow.
For downhill conveyors, regenerative operation can become an important consideration.
16. Crusher Applications
Crushers experience rapidly changing mechanical loads.
The material entering the crusher may vary in hardness, density, size, and quantity.
This creates a challenging operating environment for the motor.
A large PowerFlex 755 drive can provide controlled motor speed and torque, helping integrate the motor into the overall crusher-control strategy.
Potential applications include:
- Primary crushers
- Secondary crushers
- Jaw crushers
- Gyratory crushers
- Cone crushers
- Aggregate processing equipment
The actual motor-control method should be selected according to the crusher manufacturer’s mechanical requirements.
17. Large Pump Applications
Large pumps are another important application area.
A variable-frequency drive allows motor speed to change according to the process requirement.
Applications include:
- Mine dewatering
- Water transfer
- Raw-water pumping
- Cooling-water circulation
- Industrial process pumps
- Wastewater systems
- Irrigation
- Large circulation systems
For centrifugal pumps, speed control can provide a convenient method of adjusting flow and pressure.
This can also reduce unnecessary operation at full motor speed when the process does not require maximum flow.
18. Large Fan and Blower Applications
Large fans can require several hundred kilowatts of motor power.
Examples include:
- Mine ventilation fans
- Cement plant fans
- Furnace fans
- Dust extraction systems
- Industrial exhaust systems
- Process-air blowers
- Cooling fans
- Large ventilation systems
The VFD allows fan speed to be adjusted according to airflow requirements.
This can improve process flexibility and can potentially reduce energy consumption when the required airflow is below maximum capacity.
19. Compressor Applications
Large compressors can also be driven by variable-frequency drives where the compressor design supports variable-speed operation.
Potential applications include:
- Industrial compressed-air systems
- Process gas
- Manufacturing utilities
- Large refrigeration systems
- Gas handling
- Chemical process systems
Compressor applications require special attention to minimum speed, maximum speed, lubrication, cooling, resonance, acceleration time, and compressor-specific operating limits.
The VFD should therefore be selected as part of the complete compressor package.
20. Cement Industry Applications
Cement plants contain numerous high-power motors.
The 20G1F3D1K0LNDNNNNN can be considered for applications such as:
- Large conveyors
- Crushers
- Fans
- Blowers
- Pumps
- Material feeders
- Process machinery
- Dust extraction
- Material handling
Variable-speed operation is useful where the process load changes continuously.
The large current rating also allows the drive to be considered for motors significantly larger than those normally served by compact industrial VFDs.
21. Steel and Metal Processing
Large steel and metal-processing facilities often use high-power motor systems.
Typical equipment includes:
- Cooling-water pumps
- Large fans
- Extraction systems
- Conveyors
- Material handling
- Process lines
- Rolling-related equipment
- Auxiliary machinery
In these environments, drive control is often closely integrated with PLCs, distributed control systems, safety systems, and production-management systems.
22. Material Handling
High-power material-handling systems can benefit from controlled acceleration and deceleration.
Examples include:
- Bulk-material conveyors
- Transfer systems
- Storage and reclaim equipment
- Port machinery
- Mining terminals
- Large elevators
- Industrial transport systems
If the mechanical load can drive the motor during braking, the regenerative architecture becomes particularly relevant.
23. Product Advantages
23.1 Very High Current Capacity
The most obvious characteristic is the very high current rating.
At 1135 A light duty, the drive is intended for extremely large industrial motors.
The normal-duty rating is 1045 A, while the heavy-duty rating is 960 A.
This places the model well above the current range of typical compact industrial VFDs.
23.2 High-Power Motor Control
The drive can be used with motors in the approximate 750 HP to 1000 HP range depending on the selected duty classification.
This makes it suitable for large industrial machinery where conventional small-frame drives are no longer appropriate.
23.3 Controlled Acceleration
Large motors can create significant mechanical shock if they are accelerated too aggressively.
The drive provides adjustable acceleration control so that the motor can be brought to operating speed according to the requirements of the mechanical system.
23.4 Controlled Deceleration
Controlled deceleration is useful for large rotating systems with significant inertia.
The drive can manage the speed reduction according to the application requirements.
23.5 Regenerative Operation
The AFE regenerative architecture is useful in applications where energy can flow from the mechanical system back toward the electrical supply.
This can be valuable in high-inertia and overhauling-load applications.
23.6 Industrial Floor-Mounted Construction
The Frame 9 cabinet is designed for large industrial installations.
It provides substantially more physical capacity than compact wall-mounted drives.
23.7 Automation Integration
The PowerFlex 755 platform is intended to operate as part of a larger industrial automation system.
The drive can therefore be integrated with machine control, process control, feedback systems, communication networks, and supervisory systems depending on the installed options.
23.8 Wide Application Range
The same general platform can be applied to pumps, fans, conveyors, compressors, crushers, material-handling equipment, and process machinery.
This gives system designers a common drive architecture across different areas of a plant.
24. Motor Compatibility
The drive should be selected according to the actual motor nameplate.
Important information includes:
- Motor voltage
- Motor current
- Motor power
- Motor frequency
- Motor speed
- Motor service factor
- Motor insulation system
- Motor cooling
- Required overload
- Required acceleration
- Required deceleration
- Regenerative operation
- Feedback requirements
The 480 V rating of the drive means that the motor and electrical system must be compatible with the applicable voltage class.
25. Duty Selection
The three current ratings should be understood clearly.
| Duty | Current | Approx. HP | Typical Load |
|---|---|---|---|
| Light Duty | 1135 A | 1000 HP | Moderate overload requirements |
| Normal Duty | 1045 A | 900 HP | General industrial loads |
| Heavy Duty | 960 A | 750 HP | High overload / high torque |
A motor rated at 750 HP does not necessarily require a heavy-duty configuration.
The correct selection depends on the actual load profile and overload requirements.
Similarly, simply having a 900 HP motor does not mean that the normal-duty rating is automatically suitable.
The motor current and process load should always be checked.
26. Installation Requirements
The Frame 9 cabinet is physically large.
Before installation, the following should be checked:
- Floor loading capacity
- Door and access clearance
- Cabinet lifting points
- Transportation route
- Forklift/crane requirements
- Cable-entry arrangement
- Motor cable routing
- Grounding
- Ventilation
- Heat dissipation
- Service access
- Electrical clearances
- Maintenance space
The approximate Frame 9 cabinet dimensions are 2453 mm high × 1200 mm wide × 600/800 mm deep, with approximately 1246 kg weight for the standard IP20 reference configuration.
27. Maintenance
Maintenance should focus on electrical, mechanical, and thermal conditions.
Important inspection points include:
- Cooling fans
- Air passages
- Cabinet ventilation
- Filters where installed
- Power terminals
- Bus connections
- Grounding connections
- Control wiring
- Communication wiring
- Signs of overheating
- Dust accumulation
- Fault history
- Alarm history
- Unusual vibration
- Unusual noise
Because the drive operates at very high current, loose electrical connections can create serious heating problems.
Thermal inspection can therefore be particularly useful during preventive maintenance.
28. Typical Applications by Industry
| Industry | Typical Equipment | Suitability of 20G1F3D1K0LNDNNNNN |
|---|---|---|
| Mining | Conveyors, crushers, pumps, fans | High-power applications |
| Cement | Crushers, fans, conveyors, pumps | High-power applications |
| Aggregate | Crushers, conveyors, screens | High-power applications |
| Steel | Fans, pumps, conveyors, process equipment | High-power applications |
| Water | Large pumps | High-power applications |
| Wastewater | Large pumping systems | High-power applications |
| Manufacturing | Large process machinery | High-power applications |
| Ports | Bulk conveyors, material handling | High-power applications |
| Chemical | Pumps, fans, compressors | Application dependent |
| Oil & Gas | Pumps, compressors, fans | Application dependent |
| Power Generation | Pumps, fans, auxiliaries | Application dependent |
29. Five Related PowerFlex 755 Models
The following models are closely related PowerFlex 755 configurations and can be used as comparison points around the high-power range.
- 20G1F3D960LNDNNNNN
- 20G1F3D1K1LNDNNNNN
- 20G1F3D1K3LNDNNNNN
- 20G1F3D2K0LNDNNNNN
- 20G1F3D800LNDNNNNN
These catalog numbers appear within the broader PowerFlex 755 model family and represent different high-power/current configurations.
30. Related Model Comparison
| Model | Series | Voltage Class | Current / Duty Class | Frame | Cooling | Typical Construction | Approx. Dimensions | Approx. Weight |
|---|---|---|---|---|---|---|---|---|
| 20G1F3D800LNDNNNNN | PowerFlex 755 | 480 V class | 800 A class | Frame 9 class | Air cooled | Floor mounted | Approx. Frame 9 cabinet size | Approx. 1246 kg class |
| 20G1F3D960LNDNNNNN | PowerFlex 755 | 480 V class | 960 A class | Frame 9 | Air cooled | Floor mounted | Approx. 2453 × 1200 × 600/800 mm | Approx. 1246 kg |
| 20G1F3D1K0LNDNNNNN | PowerFlex 755 | 480 V | 1135 A LD / 1045 A ND / 960 A HD | Frame 9 | Air cooled | Type 1/IP21 floor mount | Approx. 2453 × 1200 × 600/800 mm | Approx. 1246 kg |
| 20G1F3D1K1LNDNNNNN | PowerFlex 755 | 480 V class | Approximately 1135 A class | Frame 9 | Air cooled | Floor mounted | Approx. Frame 9 cabinet size | Approx. 1246 kg class |
| 20G1F3D1K3LNDNNNNN | PowerFlex 755 | 480 V class | Larger than 1.0 kA class | Frame 9/10 configuration dependent | Air cooled | Floor mounted | Configuration dependent | Configuration dependent |
The exact 20G1F3D1K0LNDNNNNN configuration is identified as 480 V, 1135 A LD, 1045 A ND and 960 A HD, Frame 9.
The dimensions and weights shown for the Frame 9 models are family-level mechanical references. Final cabinet dimensions can change with enclosure and option selections.
31. Five More Closely Related High-Power Models
| Model | Product Family | Voltage Class | Current Class | Main Difference | Frame | Approx. Dimensions | Approx. Weight |
|---|---|---|---|---|---|---|---|
| 20G1F3D960LNDNNNNN | PowerFlex 755 | 480 V | 960 A class | Lower current configuration | Frame 9 | Approx. 2453 × 1200 × 600/800 mm | Approx. 1246 kg |
| 20G1F3D1K1LNDNNNNN | PowerFlex 755 | 480 V | 1135 A class | Higher power configuration | Frame 9 | Approx. 2453 × 1200 × 600/800 mm | Approx. 1246 kg |
| 20G1F3D1K3LNDNNNNN | PowerFlex 755 | 480 V | Higher than 1 kA class | Higher-current configuration | Frame 9/10 dependent | Configuration dependent | Configuration dependent |
| 20G1F3D1K4LNDNNNNN | PowerFlex 755 | 480 V | Very-high-current class | Higher-power industrial configuration | Frame 9/10 dependent | Configuration dependent | Configuration dependent |
| 20G1F3D2K0LNDNNNNN | PowerFlex 755 | 480 V | Approximately 2 kA class | Very high-current configuration | Frame 10 class | Configuration dependent | Configuration dependent |
These model families are represented in PowerFlex 755 catalog listings.
32. Five Same-Brand Reference Models
For a broader product comparison, the following five models cover different sizes and application ranges within the same brand family.
| Model | Product Series | Voltage Class | Current / Power Class | Typical Application | Cooling | Approx. Dimensions | Approx. Weight |
|---|---|---|---|---|---|---|---|
| 25B-D2P3N114 | PowerFlex 525 | 480 V class | Small-current class | Small pumps, fans, conveyors | Air cooled | Compact-frame configuration | Approx. 1.5 kg class |
| 25B-D6P0N114 | PowerFlex 525 | 480 V class | Small-current class | Small and medium machinery | Air cooled | Compact-frame configuration | Approx. 2–3 kg class |
| 20F1AGD302AN0NNNNN | PowerFlex 753 | 480 V class | 302 A class | Medium/high-power machinery | Air cooled | Frame dependent | Configuration dependent |
| 20G1F3D960LNDNNNNN | PowerFlex 755 | 480 V class | 960 A class | Large industrial motors | Air cooled | Approx. 2453 × 1200 × 600/800 mm | Approx. 1246 kg |
| 20G1F3D1K1LNDNNNNN | PowerFlex 755 | 480 V class | 1135 A class | Very large industrial motors | Air cooled | Approx. 2453 × 1200 × 600/800 mm | Approx. 1246 kg |
The smaller PowerFlex 525 models belong to a completely different physical and electrical size class, while the PowerFlex 753 and PowerFlex 755 products provide progressively larger industrial-drive platforms.
The 20G1F3D960LNDNNNNN and 20G1F3D1K1LNDNNNNN are particularly close references when the application is already in the large Frame 9 PowerFlex 755 range.
33. Comparison With Smaller Drives
The difference between a compact VFD and the 20G1F3D1K0LNDNNNNN is substantial.
A compact drive may weigh only a few kilograms and fit inside a small control cabinet.
The 20G1F3D1K0LNDNNNNN belongs to a completely different class.
Its approximate Frame 9 cabinet weight is about 1246 kg, and its cabinet height is approximately 2453 mm.
This means transportation, lifting, floor loading, ventilation, and electrical-room planning all become significant engineering considerations.
34. Comparison With the 960 A Class
The 960 A class is an important comparison because it is close to the heavy-duty current rating of the target model.
| Feature | 960 A Class | 20G1F3D1K0LNDNNNNN |
|---|---|---|
| Product Family | PowerFlex 755 | PowerFlex 755 |
| Voltage | 480 V class | 480 V |
| Current Class | 960 A | 1135 A LD / 1045 A ND / 960 A HD |
| Frame | Frame 9 class | Frame 9 |
| Cooling | Air cooled | Air cooled |
| Construction | Floor mounted | Floor mounted |
| Approx. Dimensions | Frame 9 class | 2453 × 1200 × 600/800 mm |
| Approx. Weight | Approx. 1246 kg class | Approx. 1246 kg |
| Application | Large motors | Very large motors |
The important point is that the target model’s 960 A heavy-duty rating reaches the same current level while providing higher light-duty and normal-duty ratings.
35. Advantages for Conveyor Systems
The 20G1F3D1K0LNDNNNNN can provide:
- High motor current capacity
- Controlled acceleration
- Controlled deceleration
- Variable operating speed
- Large-motor compatibility
- Regenerative operation where appropriately configured
- Industrial automation integration
- High-power process control
These characteristics make the drive suitable for large belt conveyors and bulk-material transport systems.
36. Advantages for Pump Systems
For large pump applications, the drive can provide:
- Variable flow control
- Adjustable motor speed
- Controlled starting
- Controlled stopping
- Reduced mechanical shock
- Process coordination
- Large-motor current capability
The drive can be particularly useful where the pump does not need to operate continuously at maximum speed.
37. Advantages for Fan Systems
For large fans and blowers, the major benefit is the ability to regulate airflow through motor speed.
Potential benefits include:
- Adjustable airflow
- Controlled starting
- Controlled stopping
- Reduced mechanical shock
- Improved process flexibility
- Integration with plant automation
- Large motor capability
Fan and blower applications can also benefit from speed reduction during periods when maximum airflow is not required.
38. Advantages for Mining Equipment
Mining applications can place substantial demands on motor-control systems.
The drive provides a high-current platform suitable for large motors used in:
- Conveyors
- Crushers
- Fans
- Pumps
- Material handling
- Processing equipment
Its large Frame 9 construction also makes it appropriate for dedicated electrical rooms commonly used in large industrial installations.
39. Advantages for Cement Equipment
Cement manufacturing requires many high-power motors.
The 20G1F3D1K0LNDNNNNN can be considered for:
- Kiln-related equipment
- Large fans
- Crushers
- Conveyors
- Material feeders
- Pumps
- Dust collection
- Process machinery
The ability to vary motor speed can help match the equipment’s operation to the production process.
40. Advantages for Steel and Metals
Steel and metal-processing applications often contain high-power motors with rapidly changing loads.
The drive can provide:
- Variable speed
- Controlled acceleration
- Controlled deceleration
- High-current operation
- Automation integration
- Process coordination
- Regenerative operation where required
The exact application should be evaluated according to motor type, mechanical load, speed range, and process cycle.
41. Selection Checklist
Before purchasing or replacing the drive, verify the following.
| Selection Item | Requirement |
|---|---|
| Model | 20G1F3D1K0LNDNNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Input Voltage | 480 V AC |
| Phase | Three Phase |
| Light-Duty Current | 1135 A |
| Normal-Duty Current | 1045 A |
| Heavy-Duty Current | 960 A |
| Motor Power | Verify motor nameplate |
| Motor Current | Verify motor nameplate |
| Motor Frequency | Verify motor nameplate |
| Motor Speed | Verify motor nameplate |
| Load Type | Conveyor / Pump / Fan / Compressor / Process |
| Overload | Verify application |
| Regeneration | Verify application |
| Enclosure | Type 1 / IP21 configuration |
| Cooling | Air Cooled |
| Frame | Frame 9 |
| Approx. Height | 2453 mm |
| Approx. Width | 1200 mm |
| Approx. Depth | 600 or 800 mm |
| Approx. Weight | 1246 kg |
| Installation | Floor Mounted |
| Electrical Room | Adequate space required |
| Ventilation | Required |
| Maintenance Access | Required |
| Lifting Arrangement | Required |
42. Detailed Final Parameter Table
| Parameter | Detailed Specification |
|---|---|
| Product Model | 20G1F3D1K0LNDNNNNN |
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Product Series | PowerFlex 755 |
| Product Category | Industrial AC Variable Frequency Drive |
| Product Construction | Air-Cooled Packaged Drive |
| Input Voltage | 480 V AC |
| Input Phase | Three Phase |
| Light-Duty Current | 1135 A |
| Normal-Duty Current | 1045 A |
| Heavy-Duty Current | 960 A |
| Light-Duty Motor Rating | 1000 HP |
| Normal-Duty Motor Rating | 900 HP |
| Heavy-Duty Motor Rating | 750 HP |
| Approx. LD Power | 746 kW class |
| Approx. ND Power | 671 kW class |
| Approx. HD Power | 560 kW class |
| Input Architecture | AFE Regenerative |
| Cooling | Air Cooled |
| Mounting | Floor Mount |
| Frame | Frame 9 |
| Enclosure | Type 1 / IP21 class |
| EMI / Filtering | Standard EMI Protection |
| HIM | Door Mounted HIM |
| Dynamic Braking | None in identified configuration |
| Main Application | Large AC Motors |
| Typical Industries | Mining, Cement, Steel, Water, Manufacturing, Material Handling |
| Approx. Cabinet Height | 2453 mm |
| Approx. Cabinet Width | 1200 mm |
| Approx. Cabinet Depth | 600 or 800 mm |
| Approx. Cabinet Weight | 1246 kg |
| IP54 Height Reference | 2477 mm |
| IP54 Width Reference | 1200 mm |
| IP54 Depth Reference | 800 mm |
| IP54 Depth With Filter | Approx. 898 mm |
| IP54 Weight Reference | 1287 kg |
| Installation Environment | Industrial Electrical Room |
| Cooling Requirement | Adequate Forced-Air Ventilation |
| Maintenance | Periodic electrical and cooling-system inspection |
| Motor Selection | Based on current, voltage and duty |
| Replacement Selection | Verify complete catalog number and options |
The core electrical data for the exact catalog number identifies the 480 V three-phase, 1135 A LD / 1045 A ND / 960 A HD Frame 9 configuration.
The Frame 9 cabinet dimensions and weights are based on published PowerFlex 755 mechanical reference data.
43. Overall Product Summary
The Allen-Bradley 20G1F3D1K0LNDNNNNN is a very high-power PowerFlex 755 AC drive designed for large industrial motor applications.
Its principal electrical characteristic is its very high current capacity.
The configuration provides approximately 1135 A in light-duty operation, 1045 A in normal-duty operation, and 960 A in heavy-duty operation at 480 V AC, three phase.
This places it firmly in the large industrial-drive category.
The drive is particularly suitable for applications where the motor is too large for a conventional compact VFD and where controlled speed, controlled acceleration, controlled deceleration, and integration with an industrial automation system are required.
Typical applications include large conveyors, mining equipment, crushers, pumps, fans, blowers, compressors, cement machinery, material-handling systems, steel-processing equipment, and other large process machines.
The AFE regenerative configuration is another important feature.
In applications where the mechanical load can drive the motor, regenerative operation can provide a means of handling returned energy through the active front-end system rather than relying exclusively on conventional resistor-based braking.
This is especially relevant to large conveyors, high-inertia machinery, overhauling loads, and other systems with significant braking energy.
From a mechanical standpoint, the drive is a substantial piece of industrial equipment.
The Frame 9 reference cabinet is approximately 2453 mm high, 1200 mm wide, and 600 or 800 mm deep, with an approximate cabinet weight of 1246 kg.
That size means the installation should be planned as an electrical-room project rather than simply as a conventional VFD installation.
Floor loading, transportation, lifting, ventilation, heat rejection, cable routing, maintenance access, cabinet clearance, and electrical protection all need to be considered.
The model is particularly valuable where a high-power motor requires a combination of current capacity, speed control, controlled acceleration, controlled deceleration, industrial automation integration, and regenerative capability.
The most closely related comparison models are other high-power PowerFlex 755 Frame 9 configurations, particularly the 960 A, 1.0 kA-class, 1.1 kA-class and larger configurations.
When choosing between these models, the key factors are not simply horsepower.
The motor’s actual full-load current, operating voltage, duty cycle, overload requirement, acceleration requirements, mechanical load, regenerative behavior, environmental conditions, enclosure requirements, and available installation space should all be checked.
In practical terms, the 20G1F3D1K0LNDNNNNN can be regarded as a high-capacity industrial drive intended for large AC motors and demanding continuous-process equipment.
Its combination of a 480 V three-phase electrical system, very high current capacity, Frame 9 construction, air cooling, floor-mounted packaging, and regenerative drive architecture makes it a specialized solution for large-scale industrial motor control.