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Allen-Bradley 20G1F3D800LNDNNNNN – Detailed Product Specifications, Applications, Advantages and Related Models
1. Product Introduction
The Allen-Bradley 20G1F3D800LNDNNNNN is a high-power industrial AC variable frequency drive belonging to the PowerFlex 755 AC Drive family.
It is designed for large motor applications where conventional small and medium-sized variable frequency drives are no longer sufficient.
The model is part of the high-current 480 V AC PowerFlex 755 range and is intended for demanding industrial equipment such as large conveyors, crushers, pumps, fans, blowers, mixers, process machinery, material-handling systems, and other heavy-duty motor-driven equipment.
This drive is particularly appropriate for installations where motor speed needs to be controlled rather than simply switched between on and off states.
The ability to control acceleration, deceleration, operating speed, torque, and other motor-control functions makes the PowerFlex 755 platform suitable for more sophisticated industrial machinery.
The 20G1F3D800LNDNNNNN is a large-frame drive, so its installation requirements are considerably different from those of a compact panel-mounted inverter.
Electrical-room space, cooling, power-cable routing, service clearance, grounding, protection, transportation, and maintenance access all need to be considered during system design.
The model number belongs to a high-current configuration. An associated configuration is identified as a PowerFlex 755 AC Drive with a 480 V AC class and 823 A current rating, which is useful when interpreting the electrical scale of the 800-class model.
2. Brand
Brand: Allen-Bradley
Allen-Bradley is widely associated with industrial automation and motor-control equipment.
Its product range includes programmable controllers, industrial networking products, operator interfaces, motor starters, variable frequency drives, servo systems, safety products, and other automation equipment.
The 20G1F3D800LNDNNNNN belongs to the high-power variable frequency drive portion of this product portfolio.
3. Product Series
Series: PowerFlex 755 AC Drive
The PowerFlex 755 family is designed for industrial applications that require more than basic motor speed adjustment.
It provides a flexible platform for large AC motors and can be incorporated into larger automated production systems.
The series includes a broad range of current ratings and configurations.
Within the 480 V AC high-power range, models such as the 20G1F3D740LNDNNNNN, 20G1F3D800LNDNNNNN, and 20G1F3D960LNDNNNNN provide useful current-capacity comparisons.
The 20G1F3D800LNDNNNNN sits in the upper-current portion of this group.
4. Basic Product Identification
| Parameter | Specification |
|---|---|
| Model | 20G1F3D800LNDNNNNN |
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Product Series | PowerFlex 755 AC Drive |
| Product Type | High-power AC Variable Frequency Drive |
| Configuration | Air-cooled packaged drive |
| Input Voltage Class | 480 V AC |
| Input Phase | Three-phase |
| Current Class | 800-class configuration |
| Associated Rated Current Reference | Approximately 823 A for an associated configuration |
| Frame | High-power Frame 8 class |
| Cooling | Air cooled |
| Motor Application | Large industrial AC motors |
| Speed Control | Variable-frequency operation |
| Acceleration | Programmable |
| Deceleration | Programmable |
| Torque Control | Application/configuration dependent |
| Typical Installation | Industrial floor-mounted or cabinet installation |
| Dimensions | Configuration dependent; verify final mechanical drawing |
| Weight (kg) | Configuration dependent; verify final configured equipment documentation |
The current rating should always be interpreted together with the exact catalog configuration, duty classification, motor characteristics, and application requirements.
5. Main Technical Specifications
| Parameter | Detailed Specification |
|---|---|
| Catalog Number | 20G1F3D800LNDNNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Drive Type | AC Variable Frequency Drive |
| Input Voltage | 480 V AC class |
| Input Phase | Three-phase |
| Current Class | 800-class |
| Associated Current Reference | 823 A for an associated 20G1F3D800 configuration |
| Frame | High-power Frame 8 class |
| Cooling Method | Air cooled |
| Motor Type | Industrial AC motor |
| Output | Variable-frequency AC |
| Speed Regulation | Programmable |
| Acceleration Control | Programmable |
| Deceleration Control | Programmable |
| Torque Control | Configuration dependent |
| Typical Load Type | Constant torque and variable torque |
| Typical Applications | Conveyors, pumps, fans, crushers, mixers, blowers, process equipment |
| Installation | Industrial high-power installation |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
The 800-class model is intended for very large low-voltage motor systems.
The actual motor should be selected based on its nameplate current and application duty rather than simply matching horsepower.
6. Understanding the 800-Class Configuration
The 800 portion of the model designation identifies a very high-current configuration within this PowerFlex 755 range.
This is important because current rating is one of the most useful ways to determine whether a drive is appropriate for a particular motor.
Large motors can draw hundreds of amps during normal operation, and the demand can be considerably higher during acceleration or difficult load conditions.
A high-current drive is therefore normally used for equipment such as:
- Large belt conveyors
- Crushers
- Large pumps
- Large industrial fans
- Heavy mixers
- Material feeders
- Process machinery
- Large blowers
- Mining equipment
- Bulk-material handling systems
An associated 20G1F3D800 configuration is listed with 823 A at 480 V AC, illustrating the electrical scale of this product class.
7. 480 V AC Three-Phase Operation
The 20G1F3D800LNDNNNNN belongs to the 480 V AC industrial voltage class.
Three-phase 480 V systems are widely used for large industrial motors.
At high motor power levels, using a 480 V system allows the motor to deliver substantial mechanical power without requiring the extremely high current that would be necessary at lower voltage.
This makes the voltage class particularly appropriate for:
- Large pumps
- Large fans
- Mining conveyors
- Crushers
- Process machinery
- Industrial blowers
- Material-handling equipment
The actual plant supply voltage, protection system, grounding arrangement, short-circuit rating, and cable system must be evaluated before installation.
8. High-Power Frame Construction
The 20G1F3D800LNDNNNNN belongs to the large physical construction range of the PowerFlex 755 family.
A drive of this electrical size cannot be installed in the same way as a small wall-mounted inverter.
The mechanical installation needs space for:
- Incoming power connections
- Motor output connections
- Control wiring
- Cooling airflow
- Maintenance
- Inspection
- Service access
- Cable bending radius
- Grounding connections
- Heat dissipation
This is especially important when several large drives are installed in the same electrical room.
9. Air-Cooled Design
The model is an air-cooled packaged drive.
Air cooling provides a practical method of removing heat from the drive’s power electronics.
At a current level in the 800-class range, thermal management becomes a major engineering consideration.
The surrounding electrical room or enclosure must have adequate ventilation.
The cooling system must also be kept clean.
Dust buildup can restrict airflow and increase operating temperatures.
For installations in mining, cement, aggregate, steel, or other dusty environments, environmental protection and maintenance become especially important.
10. Variable-Speed Motor Control
The main purpose of the drive is to control an AC motor using variable frequency and voltage.
This allows the motor to operate at different speeds.
A fixed-speed motor can only operate at the speed determined largely by its supply frequency and motor characteristics.
A variable frequency drive provides a much wider range of operating control.
This is useful when the process does not always require maximum motor speed.
For example:
A conveyor may operate at low speed during startup and higher speed during normal production.
A pump may reduce speed when fluid demand decreases.
A fan may operate more slowly when less airflow is needed.
A mixer may use different speeds during different stages of production.
11. Controlled Acceleration
Large motors can create substantial mechanical stress when started abruptly.
The PowerFlex 755 architecture allows acceleration to be controlled.
Instead of immediately commanding full operating speed, the drive can bring the motor up to speed according to a programmed acceleration profile.
This is particularly valuable for machines with high inertia.
Typical equipment includes:
- Long conveyors
- Heavy rollers
- Large fans
- Large pumps
- Crushers
- Mixers
- Large rotating machines
Controlled acceleration can reduce mechanical shock and make the startup sequence more predictable.
12. Controlled Deceleration
Stopping a large motor also requires careful control.
A large rotating machine can contain considerable kinetic energy.
If the motor is stopped too quickly, mechanical stress can be transferred to the gearbox, shaft, coupling, belt, or other machine components.
A drive can provide controlled deceleration according to the requirements of the application.
Typical applications include:
- Conveyor stopping
- Pump shutdown
- Fan speed reduction
- Material-handling sequences
- Process-machine stopping
- Production-line synchronization
The actual braking arrangement depends on the application and the configured drive system.
13. Torque Control
Speed is only one part of motor control.
Many large industrial machines require substantial torque during startup and changing load conditions.
Examples include:
- Crushers
- Loaded conveyors
- Mixers
- Feeders
- Material-processing machines
- Heavy rotating equipment
The PowerFlex 755 family supports advanced motor-control strategies suitable for demanding industrial applications.
The appropriate control method depends on the motor, load, feedback arrangement, and application requirements.
14. Major Product Advantages
14.1 High Current Capacity
The primary advantage of the 20G1F3D800LNDNNNNN is its very high current capacity.
A drive in this class can handle motor applications that would be outside the practical range of smaller variable frequency drives.
This makes it suitable for large industrial motors used in heavy machinery.
14.2 Large Motor Applications
The drive is intended for substantial industrial motor systems.
It can be considered for:
- Large conveyors
- Crushers
- Pumps
- Fans
- Blowers
- Mixers
- Feeders
- Process machinery
- Material-handling equipment
14.3 Adjustable Motor Speed
The drive allows the motor to operate at different speeds according to process requirements.
This is useful where production conditions change during operation.
14.4 Controlled Starting
Controlled acceleration can help reduce mechanical shock.
This is particularly useful for large machines with significant inertia or high starting loads.
14.5 Controlled Stopping
Controlled deceleration can provide a more predictable stopping process.
This can be useful in automated production lines and material-handling systems.
14.6 Industrial Automation Integration
The PowerFlex 755 family can be integrated into broader industrial control systems.
The drive can form part of a system involving:
- Programmable controllers
- Operator interfaces
- Industrial communication
- Process instrumentation
- Feedback devices
- Motor monitoring
- Alarm systems
This allows motor control to become part of the overall machine or production process.
15. Conveyor Applications
Large conveyors are one of the most common application categories for very high-current drives.
A long conveyor can have:
- Large belt mass
- High material loading
- Long shafts
- Large gearboxes
- Multiple rollers
- High starting torque
Starting such a system directly can create significant mechanical stress.
A variable frequency drive can bring the motor up to speed gradually.
The operating speed can also be adjusted according to material flow.
This is useful in:
- Mining
- Cement
- Aggregate
- Ports
- Steel
- Bulk-material handling
- Manufacturing
16. Mining Applications
Mining equipment often uses very large motors.
Potential applications include:
- Main belt conveyors
- Crusher drives
- Feeders
- Dewatering pumps
- Ventilation fans
- Screens
- Processing equipment
- Material-transfer systems
Mining environments can be dusty and mechanically demanding.
For this reason, cooling, enclosure design, maintenance, and environmental protection need to be considered carefully.
17. Cement Industry Applications
Cement plants use large motor-driven machines throughout the production process.
The 20G1F3D800LNDNNNNN can be considered for applications such as:
- Large conveyors
- Crushers
- Process fans
- Blowers
- Pumps
- Mixers
- Material-handling equipment
- Process machinery
Variable-speed operation can be useful when the production process requires different operating speeds.
18. Aggregate Processing
Aggregate plants frequently use high-power crushers, screens, feeders, and conveyors.
These machines can experience changing loads depending on material size, feed rate, and operating conditions.
A high-current variable frequency drive can provide controlled acceleration and speed control.
The drive should be selected according to the actual motor current and load profile.
19. Crusher Applications
Crushers can be among the more demanding applications for a high-power drive.
A crusher may contain material when the motor starts.
The motor may therefore require substantial starting torque.
A properly selected drive can provide controlled acceleration while allowing the motor to operate at the required speed.
Important selection factors include:
- Motor current
- Starting torque
- Overload requirement
- Mechanical inertia
- Crusher type
- Material load
- Duty cycle
- Ambient conditions
20. Large Pump Applications
Large industrial pumps can require several hundred amps or more depending on their power rating.
A variable frequency drive allows pump speed to be adjusted according to actual process requirements.
Applications include:
- Industrial water
- Wastewater
- Cooling water
- Mining dewatering
- Process fluids
- Water-treatment systems
- Large pumping stations
The actual energy performance depends on the hydraulic system and operating profile.
21. Large Fan and Blower Applications
Large fans and blowers are also appropriate candidates for variable-speed operation.
Typical applications include:
- Industrial ventilation
- Furnace systems
- Cement production
- Mining ventilation
- Dust collection
- Process exhaust
- Cooling systems
- Combustion air systems
The drive allows fan speed to be changed according to airflow requirements.
22. Mixer Applications
Industrial mixers can have highly variable mechanical loads.
A mixer may require significant torque during startup and less torque once the material is moving.
The drive can provide controlled acceleration and adjustable operating speed.
Potential applications include:
- Cement mixing
- Chemical processing
- Material blending
- Industrial production
- Bulk-material processing
- Process mixing
23. Compressor Applications
Large compressors can require substantial motor power.
A variable frequency drive may be appropriate when the compressor design supports variable-speed operation.
Before selecting the drive, engineers should consider:
- Compressor type
- Motor current
- Starting torque
- Operating speed
- Load profile
- Cooling
- Process control
- Bypass requirements
The 20G1F3D800LNDNNNNN is suitable for consideration where the compressor motor falls within its applicable current and duty range.
24. Material-Handling Applications
Large material-handling systems often require precise coordination between multiple machines.
Examples include:
- Belt conveyors
- Roll conveyors
- Feeders
- Transfer systems
- Bulk-material handling
- Production-line conveyors
Variable-frequency control allows the motor speed to be matched to the material flow.
This can also make machine sequencing easier.
25. Constant-Torque Applications
Constant-torque applications can place considerable demands on a drive.
Typical examples include:
- Conveyors
- Crushers
- Mixers
- Feeders
- Material-processing equipment
These loads may require substantial torque throughout a wide speed range.
Drive selection should therefore consider actual current and overload requirements rather than relying only on horsepower.
26. Variable-Torque Applications
Pumps and fans are common variable-torque applications.
Their power requirements change substantially with operating speed.
A variable frequency drive can adjust the motor speed according to the process requirement.
This makes the PowerFlex 755 family useful for:
- Large water pumps
- Cooling systems
- Industrial ventilation
- Process fans
- Large blowers
- Circulation systems
27. Electrical Installation Requirements
A drive in this current class requires careful electrical planning.
Incoming Power
The plant supply must be capable of supporting the drive under expected operating conditions.
Protection
Appropriate upstream protection and disconnect equipment must be selected.
Grounding
A properly designed grounding system is required for safe operation and equipment protection.
Power Cables
Power cables must be selected based on current, temperature, installation method, cable length, applicable standards, and voltage drop.
Motor Cables
Motor conductors must be appropriately sized for the motor current and installation environment.
Control Wiring
Control wiring should be separated from high-current conductors where necessary to reduce interference.
28. Motor Selection
The motor should be evaluated together with the drive.
Important motor information includes:
- Rated voltage
- Rated current
- Rated frequency
- Rated speed
- Rated power
- Power factor
- Efficiency
- Starting torque
- Continuous duty
- Overload requirement
- Speed range
- Feedback requirements
The motor’s actual rated current is one of the most important factors in confirming whether this drive is appropriate.
29. Thermal Management
Thermal management becomes increasingly important as drive current increases.
A large drive produces heat during operation.
The electrical room or enclosure must therefore provide sufficient cooling.
Important factors include:
- Ambient temperature
- Airflow
- Ventilation
- Dust
- Cooling fan condition
- Air filters
- Enclosure arrangement
- Heat dissipation
The cooling system should be considered as part of the drive installation rather than as a separate issue.
30. Maintenance
A high-power air-cooled drive should be included in a planned maintenance program.
Inspection areas include:
- Cooling fans
- Air passages
- Power connections
- Control wiring
- Grounding
- Enclosure condition
- Dust accumulation
- Signs of overheating
- Abnormal noise
- Abnormal vibration
- Fault history
- Motor connections
Keeping the cooling system clean is especially important in dusty industrial environments.
31. Troubleshooting
Troubleshooting should consider the complete motor-driven system.
Input Power
Check the incoming three-phase supply, protection equipment, disconnects, and grounding.
Drive
Check operating status, fault history, current, speed reference, and control parameters.
Motor
Check motor wiring, insulation, temperature, bearings, and nameplate data.
Mechanical Equipment
Check for:
- Mechanical blockage
- Excessive load
- Bearing damage
- Gearbox problems
- Belt problems
- Pump blockage
- Crusher blockage
- Misalignment
A drive fault does not necessarily indicate a failed drive.
The mechanical system can create conditions that cause the drive to trip.
32. Environmental Considerations
The installation environment should be evaluated carefully.
Important factors include:
- Ambient temperature
- Humidity
- Dust
- Corrosive gases
- Altitude
- Vibration
- Water exposure
- Chemical contamination
- Ventilation
- Electrical noise
For mining, cement, aggregate, and other dusty applications, enclosure and maintenance requirements deserve particular attention.
33. Mechanical Dimensions and Weight
For a high-current Frame 8-class drive, exact dimensions and weight should not be guessed.
The final physical arrangement can vary depending on the configured package and associated equipment.
The following information should therefore be used as an engineering guide rather than as a fabricated cabinet dimension.
| Mechanical Parameter | Specification |
|---|---|
| Model | 20G1F3D800LNDNNNNN |
| Frame | High-power Frame 8 class |
| Cooling | Air cooled |
| Mounting | Large industrial installation |
| Cabinet Arrangement | Configuration dependent |
| Height | Configuration dependent |
| Width | Configuration dependent |
| Depth | Configuration dependent |
| Dimensions (H × W × D) | Verify final mechanical drawing |
| Weight (kg) | Verify final configured equipment documentation |
| Cable Entry | Configuration dependent |
| Service Clearance | Installation dependent |
| Floor Loading | Must be evaluated using final equipment weight |
| Transportation | Depends on final configured dimensions and weight |
The final mechanical drawing should be used before designing cabinets, foundations, lifting systems, cable trays, or equipment rooms.
34. Electrical and Mechanical Parameter Summary
| Parameter | Specification |
|---|---|
| Catalog Number | 20G1F3D800LNDNNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Product Type | AC Variable Frequency Drive |
| Input Voltage | 480 V AC class |
| Input Phase | Three-phase |
| Current Class | 800-class |
| Associated Current Reference | 823 A for an associated configuration |
| Frame | High-power Frame 8 class |
| Cooling | Air cooled |
| Motor Application | Large industrial AC motors |
| Frequency Control | Variable frequency |
| Speed Control | Variable speed |
| Acceleration | Programmable |
| Deceleration | Programmable |
| Torque Control | Application dependent |
| Typical Load | Constant torque / variable torque |
| Typical Applications | Conveyors, crushers, pumps, fans, blowers, mixers |
| Installation | Industrial |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
35. Five Related or Same-Series Models
The following models are useful comparison points within the same general PowerFlex 755 high-power range.
| Model | Series | Voltage | Current Class | Frame | Cooling | Typical Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 20G1F3D617LNDNNNNN | PowerFlex 755 | 480 V AC | 617 A | 8 | Air cooled | High-power industrial motors | Configuration dependent | Configuration dependent |
| 20G1F3D710LNDNNNNN | PowerFlex 755 | 480 V AC | 710 A | 8 | Air cooled | Very large motors | Configuration dependent | Configuration dependent |
| 20G1F3D740LNDNNNNN | PowerFlex 755 | 480 V AC | 740 A | 8 | Air cooled | Very large industrial equipment | Configuration dependent | Configuration dependent |
| 20G1F3D960LNDNNNNN | PowerFlex 755 | 480 V AC | 960 A class | 8-class high-power configuration | Air cooled | Very high-power motor systems | Configuration dependent | Configuration dependent |
| 20G1F3E545LNDNNNNN | PowerFlex 755 | Higher-voltage class | 545 A class | High-power frame | Air cooled | Large industrial motor systems | Configuration dependent | Configuration dependent |
The first four models provide particularly useful current-capacity comparisons around the 20G1F3D800LNDNNNNN.
The 20G1F3E545LNDNNNNN is included as a related PowerFlex 755 model from a different voltage class and should therefore be treated as a family reference rather than a direct electrical substitute.
36. Related Model – 20G1F3D617LNDNNNNN
The 20G1F3D617LNDNNNNN is a lower-current model within the same PowerFlex 755 high-power range.
It is useful when the motor current requirement is substantial but does not approach the 800-class configuration.
| Parameter | Specification |
|---|---|
| Model | 20G1F3D617LNDNNNNN |
| Series | PowerFlex 755 |
| Voltage | 480 V AC |
| Current | 617 A class |
| Frame | 8 |
| Cooling | Air cooled |
| Typical Application | High-power conveyors, pumps, fans and process equipment |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
37. Related Model – 20G1F3D710LNDNNNNN
The 20G1F3D710LNDNNNNN provides a current rating immediately below the 740 A and 800-class range.
It is a useful alternative when the motor current is large but does not require the higher current capacity of the 800-class configuration.
| Parameter | Specification |
|---|---|
| Model | 20G1F3D710LNDNNNNN |
| Series | PowerFlex 755 |
| Voltage | 480 V AC |
| Current | 710 A |
| Frame | 8 |
| Cooling | Air cooled |
| Typical Application | Very large industrial motors |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
38. Related Model – 20G1F3D740LNDNNNNN
The 20G1F3D740LNDNNNNN is another close comparison.
It provides slightly lower current capacity than the 800-class configuration while remaining in the same general high-power family.
| Parameter | Specification |
|---|---|
| Model | 20G1F3D740LNDNNNNN |
| Series | PowerFlex 755 |
| Voltage | 480 V AC |
| Current | 740 A |
| Frame | 8 |
| Cooling | Air cooled |
| Typical Application | Large conveyors, pumps, fans, crushers and process machinery |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
39. Related Model – 20G1F3D960LNDNNNNN
The 20G1F3D960LNDNNNNN provides a higher current class than the 800-class configuration.
It is useful as a reference when the motor current requirement exceeds the capacity of the 20G1F3D800LNDNNNNN.
| Parameter | Specification |
|---|---|
| Model | 20G1F3D960LNDNNNNN |
| Series | PowerFlex 755 |
| Voltage | 480 V AC class |
| Current | 960 A class |
| Frame | High-power configuration |
| Cooling | Air cooled |
| Typical Application | Very high-power industrial motor systems |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
40. Related Model – 20G1F3E545LNDNNNNN
The 20G1F3E545LNDNNNNN belongs to the same broad PowerFlex 755 family but represents a different voltage class.
It is therefore useful for projects where the motor voltage or plant electrical architecture differs from the 480 V class.
| Parameter | Specification |
|---|---|
| Model | 20G1F3E545LNDNNNNN |
| Series | PowerFlex 755 |
| Voltage Class | Different from 480 V D-series configuration |
| Current | 545 A class |
| Cooling | Air cooled |
| Product Type | AC Variable Frequency Drive |
| Typical Application | Large industrial motor systems |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
This model should not be treated as a direct electrical replacement for the 20G1F3D800LNDNNNNN without checking motor and plant voltage requirements.
41. Five Same-Brand Reference Models
For broader comparison within the Allen-Bradley drive portfolio, the following PowerFlex models are useful reference points.
| Model | Product Family | Voltage Class | Current / Power Class | Frame | Typical Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 20G1F3D617LNDNNNNN | PowerFlex 755 | 480 V AC | 617 A | 8 | High-power motor control | Configuration dependent | Configuration dependent |
| 20G1F3D710LNDNNNNN | PowerFlex 755 | 480 V AC | 710 A | 8 | Very large motor systems | Configuration dependent | Configuration dependent |
| 20G1F3D740LNDNNNNN | PowerFlex 755 | 480 V AC | 740 A | 8 | Heavy industrial machinery | Configuration dependent | Configuration dependent |
| 20G1F3D800LNDNNNNN | PowerFlex 755 | 480 V AC | 800-class / associated 823 A configuration | High-power Frame 8 class | Very large motor systems | Configuration dependent | Configuration dependent |
| 20G1F3D960LNDNNNNN | PowerFlex 755 | 480 V AC | 960 A class | High-power configuration | Extremely large industrial motors | Configuration dependent | Configuration dependent |
These models are especially useful for comparing current capacity around the upper end of the 480 V PowerFlex 755 range.
42. Current-Class Comparison
| Model | Current Class | Voltage | Relative Application Scale | Frame | Cooling | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 20G1F3D617LNDNNNNN | 617 A | 480 V AC | High-power industrial | 8 | Air cooled | Configuration dependent | Configuration dependent |
| 20G1F3D710LNDNNNNN | 710 A | 480 V AC | Very high-power industrial | 8 | Air cooled | Configuration dependent | Configuration dependent |
| 20G1F3D740LNDNNNNN | 740 A | 480 V AC | Very high-power industrial | 8 | Air cooled | Configuration dependent | Configuration dependent |
| 20G1F3D800LNDNNNNN | 800-class | 480 V AC | Extremely high-power industrial | High-power Frame 8 class | Air cooled | Configuration dependent | Configuration dependent |
| 20G1F3D960LNDNNNNN | 960 A class | 480 V AC | Extremely high-power industrial | High-power configuration | Air cooled | Configuration dependent | Configuration dependent |
The 20G1F3D800LNDNNNNN is therefore positioned between the 740 A and 960 A classes in this comparison.
43. Application Comparison
| Application | Suitability | Main Reason |
|---|---|---|
| Large Conveyor | High | High current and controlled acceleration |
| Mining Conveyor | High | Large motor and variable load |
| Large Crusher | High | High starting torque |
| Large Pump | High | Variable-speed flow control |
| Large Fan | High | Adjustable airflow |
| Industrial Blower | High | Variable process demand |
| Large Mixer | High | Changing mechanical load |
| Material Feeder | High | Adjustable speed and torque |
| Bulk Material Handling | High | Large motor capacity |
| Process Machinery | High | Flexible motor-speed control |
| Large Compressor | Application dependent | Depends on compressor design |
| Small Machine Motor | Generally oversized | Current capacity is much higher than normally required |
44. Advantages in Conveyor Systems
For large conveyor installations, the high current capability is particularly useful.
A large belt conveyor may have significant belt mass and may carry a heavy material load.
Starting the conveyor suddenly can create mechanical stress.
Variable-frequency acceleration provides a smoother starting sequence.
The operating speed can also be adjusted according to the required material flow.
In a large automated material-handling system, this allows the conveyor to operate as part of a coordinated process rather than as an isolated motor.
45. Advantages in Mining Equipment
Mining applications frequently combine large motors with severe mechanical and environmental conditions.
The 20G1F3D800LNDNNNNN can be considered for:
- Large conveyors
- Crushers
- Feeders
- Fans
- Pumps
- Processing systems
Its high current capability makes it suitable for large low-voltage motors where variable-speed control is required.
Environmental conditions must still be considered carefully, particularly dust, temperature, ventilation, and maintenance access.
46. Advantages in Cement Plants
Cement plants contain many high-power motors.
The drive can be applied to:
- Conveyors
- Crushers
- Fans
- Blowers
- Pumps
- Mixers
- Material-handling systems
The controlled starting capability is particularly useful for large rotating machinery.
Variable-speed control can also be used where the production process requires different operating speeds.
47. Advantages in Pump Systems
Large pumps can benefit from variable-speed operation when process flow varies.
Instead of keeping the motor at maximum speed continuously, the drive can adjust the motor speed according to the required operating point.
Potential application areas include:
- Water treatment
- Industrial water
- Wastewater
- Cooling systems
- Mining dewatering
- Process circulation
The actual energy performance depends on the pump and hydraulic system.
48. Advantages in Fan Systems
Large fans and blowers can consume significant power.
Variable-speed control allows airflow to be adjusted to process requirements.
This can be useful in:
- Industrial ventilation
- Furnace systems
- Dust collection
- Cement production
- Mining
- Process exhaust
- Cooling
The drive can provide the electrical control necessary to vary the fan motor speed.
49. Advantages in Continuous-Process Equipment
Continuous-process machinery often operates for long periods.
The drive installation should therefore be designed with attention to:
- Thermal management
- Motor loading
- Cooling
- Electrical protection
- Fault monitoring
- Maintenance
- Control-system integration
The 20G1F3D800LNDNNNNN is appropriate for consideration in large continuous-process motor systems where the electrical rating and application duty are compatible.
50. Automation and Control Integration
The drive can operate as part of a larger industrial automation system.
Typical information exchanged with the control system can include:
- Start command
- Stop command
- Speed reference
- Actual speed
- Motor current
- Drive status
- Fault status
- Alarm information
- Process status
This makes it possible to coordinate motor operation with other machines and process equipment.
51. Feedback Applications
Some large industrial machines require feedback for more precise speed control.
Feedback can be useful for applications involving:
- Coordinated conveyors
- Material handling
- Tension control
- Precision process machinery
- Large rotating systems
The exact feedback hardware and control strategy depend on the application.
52. Electrical Room Planning
A drive of this size requires careful electrical-room planning.
The room should have sufficient space for:
- Drive installation
- Power-cable routing
- Control wiring
- Cooling airflow
- Maintenance
- Inspection
- Service access
- Lifting
- Transportation
The final configured dimensions and weight should be confirmed before the room layout is finalized.
53. Transportation and Handling
High-power Frame 8 equipment can be physically large and heavy.
Transportation planning should therefore consider:
- Packaging dimensions
- Door openings
- Loading dock access
- Floor loading
- Forklift capacity
- Crane requirements
- Final installation position
- Service access
The exact weight should be confirmed from the final configured equipment documentation.
54. Replacement and Retrofit Considerations
When replacing an existing large drive, engineers should compare more than voltage and current.
The following should be checked:
- Motor voltage
- Motor current
- Motor power
- Drive current rating
- Duty classification
- Existing cabinet dimensions
- Power-cable arrangement
- Control wiring
- Communication architecture
- Feedback equipment
- Braking requirements
- Cooling arrangement
- Environmental conditions
- Safety requirements
- Mechanical installation
A replacement project may require cabinet modifications, wiring changes, programming adjustments, or changes to the control system.
55. Product Selection Checklist
| Selection Item | Requirement |
|---|---|
| Model | 20G1F3D800LNDNNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Input Voltage | 480 V AC class |
| Input Phase | Three-phase |
| Current Class | 800-class |
| Associated Current Reference | 823 A configuration reference |
| Frame | High-power Frame 8 class |
| Cooling | Air cooled |
| Motor Voltage | Confirm nameplate |
| Motor Current | Confirm against drive rating |
| Motor Power | Confirm |
| Load Type | Constant torque / variable torque |
| Overload Requirement | Confirm |
| Starting Torque | Confirm |
| Operating Speed | Confirm |
| Minimum Speed | Confirm |
| Maximum Speed | Confirm |
| Braking | Determine application requirement |
| Feedback | Determine requirement |
| Communication | Determine requirement |
| Environment | Confirm |
| Cooling | Confirm |
| Dimensions | Confirm final mechanical drawing |
| Weight (kg) | Confirm final configured equipment weight |
| Cabinet | Confirm |
| Cable Entry | Confirm |
| Grounding | Confirm |
| Protection | Confirm |
56. Comprehensive Product Parameter Table
| Parameter | Specification |
|---|---|
| Catalog Number | 20G1F3D800LNDNNNNN |
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Product Series | PowerFlex 755 AC Drive |
| Product Type | High-power AC Variable Frequency Drive |
| Input Voltage | 480 V AC class |
| Input Phase | Three-phase |
| Current Class | 800-class |
| Associated Current Reference | 823 A for associated configuration |
| Frame | High-power Frame 8 class |
| Cooling | Air cooled |
| Motor Type | Large industrial AC motor |
| Output | Variable-frequency AC |
| Speed Control | Variable speed |
| Acceleration | Programmable |
| Deceleration | Programmable |
| Torque Control | Configuration dependent |
| Load Types | Constant torque / variable torque |
| Typical Applications | Conveyors, pumps, fans, crushers, mixers, blowers |
| Automation Integration | Suitable for industrial control systems |
| Installation | Large industrial installation |
| Mechanical Arrangement | Configuration dependent |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
| Thermal Management | Required |
| Maintenance | Periodic inspection required |
| Motor Selection | Must be matched to actual current and duty |
57. Five Related Models – Final Comparison
| Model | Voltage | Current Class | Frame | Cooling | Main Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 20G1F3D617LNDNNNNN | 480 V AC | 617 A | 8 | Air cooled | High-power industrial motors | Configuration dependent | Configuration dependent |
| 20G1F3D710LNDNNNNN | 480 V AC | 710 A | 8 | Air cooled | Very large motor systems | Configuration dependent | Configuration dependent |
| 20G1F3D740LNDNNNNN | 480 V AC | 740 A | 8 | Air cooled | Heavy industrial machinery | Configuration dependent | Configuration dependent |
| 20G1F3D960LNDNNNNN | 480 V AC | 960 A class | High-power | Air cooled | Extremely large motor systems | Configuration dependent | Configuration dependent |
| 20G1F3E545LNDNNNNN | Different voltage class | 545 A class | High-power | Air cooled | Large industrial motor systems | Configuration dependent | Configuration dependent |
58. Five Same-Brand Reference Models – Final Comparison
| Model | Product Family | Voltage Class | Current Class | Frame | Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 20G1F3D617LNDNNNNN | PowerFlex 755 | 480 V AC | 617 A | 8 | High-power motors | Configuration dependent | Configuration dependent |
| 20G1F3D710LNDNNNNN | PowerFlex 755 | 480 V AC | 710 A | 8 | Very large motors | Configuration dependent | Configuration dependent |
| 20G1F3D740LNDNNNNN | PowerFlex 755 | 480 V AC | 740 A | 8 | Heavy industrial motors | Configuration dependent | Configuration dependent |
| 20G1F3D800LNDNNNNN | PowerFlex 755 | 480 V AC | 800-class | High-power Frame 8 class | Very high-power motors | Configuration dependent | Configuration dependent |
| 20G1F3D960LNDNNNNN | PowerFlex 755 | 480 V AC | 960 A class | High-power | Extremely high-power motors | Configuration dependent | Configuration dependent |
59. Practical Selection Guidance
The 20G1F3D800LNDNNNNN should be selected when the actual motor and application require a current capacity in this high-power range.
It is not necessary to select a larger drive simply because the machinery is physically large.
A physically large machine can sometimes have a relatively modest motor current, while another machine with similar dimensions can require substantially more current.
The correct selection should therefore start with the motor nameplate.
The following information should then be compared with the drive:
- Motor rated current
- Motor voltage
- Motor power
- Required overload
- Starting torque
- Continuous torque
- Operating speed range
- Acceleration time
- Deceleration time
- Duty cycle
- Ambient temperature
- Altitude
- Cooling conditions
- Feedback requirements
- Braking requirements
This approach avoids both undersizing and unnecessary oversizing.
60. Key Product Advantages at a Glance
| Advantage | Practical Meaning |
|---|---|
| 800-class high-current capacity | Suitable for very large industrial motors |
| 480 V AC class | Suitable for large low-voltage industrial motor systems |
| High-power frame | Provides a platform for substantial motor power |
| Air-cooled design | Practical thermal-management arrangement |
| Variable-speed operation | Allows motor speed to follow process requirements |
| Controlled acceleration | Helps reduce mechanical starting shock |
| Controlled deceleration | Allows more controlled machine stopping |
| High torque capability | Useful for demanding mechanical loads |
| Industrial automation compatibility | Can operate as part of a larger control system |
| Broad application range | Suitable for conveyors, pumps, fans and process machinery |
| High-current flexibility | Useful for heavy industrial applications |
| Dimensions | Configuration dependent |
| Weight (kg) | Configuration dependent |
61. Recommended Application Areas
The 20G1F3D800LNDNNNNN is particularly relevant to:
- Large mining conveyors
- Cement conveyors
- Aggregate conveyors
- Large crushers
- Large feeders
- Material-handling equipment
- Large industrial pumps
- Mining dewatering systems
- Large ventilation fans
- Industrial blowers
- Large mixers
- Process machinery
- Bulk-material systems
- Large rotating equipment
- Continuous-process equipment
62. Overall Product Assessment
The Allen-Bradley 20G1F3D800LNDNNNNN represents a very high-power member of the PowerFlex 755 AC Drive family.
Its main role is the control of large industrial AC motors where high current capacity and variable-speed operation are required.
The 480 V AC class makes it suitable for large low-voltage motor systems, while the high-current configuration allows it to address applications that are beyond the practical range of smaller variable frequency drives.
The drive is particularly useful for heavy machinery that requires controlled acceleration, controlled deceleration, adjustable speed, and coordinated operation with an industrial automation system.
Its application range covers mining, cement, aggregate processing, water systems, material handling, manufacturing, process industries, and other heavy industrial environments.
The most important advantage is not simply the high current rating.
The real value comes from combining high electrical capacity with a flexible industrial motor-control architecture.
That combination allows the drive to be used as part of a larger machine-control system rather than functioning merely as an electronic motor starter.
63. Final Summary
The Allen-Bradley 20G1F3D800LNDNNNNN is a high-power PowerFlex 755 AC Variable Frequency Drive intended for large industrial motor applications.
Its principal characteristics include a 480 V AC three-phase voltage class, an 800-class high-current configuration, high-power Frame 8 construction, and an air-cooled industrial arrangement.
An associated configuration in this model class is specified at approximately 823 A at 480 V AC, demonstrating the electrical scale of the product.
The drive is suitable for demanding equipment such as large conveyors, mining machinery, crushers, pumps, fans, blowers, mixers, feeders, process machinery, and bulk-material handling systems.
Its main advantages are high current capacity, variable-speed motor control, controlled acceleration, controlled deceleration, flexible torque control, and integration into industrial automation architectures.
The five most useful related comparison models are:
- 20G1F3D617LNDNNNNN
- 20G1F3D710LNDNNNNN
- 20G1F3D740LNDNNNNN
- 20G1F3D960LNDNNNNN
- 20G1F3E545LNDNNNNN
The first four are particularly useful when comparing high-power current classes around the 480 V range, while the fifth provides a broader PowerFlex 755 family comparison.
When selecting the 20G1F3D800LNDNNNNN for a real installation, the motor’s rated current should be checked first, followed by duty cycle, overload requirement, starting torque, speed range, braking requirements, feedback, ambient conditions, cooling, cable requirements, and control-system compatibility.
The final mechanical dimensions and weight in kg should be confirmed from the exact configured equipment documentation before cabinet fabrication, transportation planning, foundation design, or electrical-room layout.
Overall, the 20G1F3D800LNDNNNNN is best characterized as a large-frame, high-current industrial AC drive for substantial 480 V motor systems, intended for applications where conventional smaller drives cannot provide the required motor-control capacity.