Company Information
E-mail		[email protected]
Mobile		+8615980777398
Whatsapp		+8615980777398
WeChat		15980777398

Allen-Bradley 20G1F3D1K1LNDNNNNN PowerFlex 755 AC Drive

1. Product Introduction

The Allen-Bradley 20G1F3D1K1LNDNNNNN is a high-power industrial AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase AC motor applications where very high current capacity, variable-speed control, controlled acceleration and deceleration, and integration with industrial automation systems are required.

The exact catalog number is identified as an air-cooled PowerFlex 755 AC packaged drive with a 480 V AC, three-phase input, 1135 A current rating, AFE regenerative architecture, Type 1/IP21-related catalog classification, floor-mounted construction, and a Frame 9C configuration with a higher-protection IP54/Type 12 door-mounted HIM arrangement.

This is a very large industrial drive. It is not intended for small machine applications or ordinary low-power motor control.

The model is more appropriate for large conveyors, mining machinery, crushers, large pumps, fans, blowers, compressors, cement equipment, material-handling systems, steel-processing equipment, and other high-power industrial processes.

One of the most important characteristics of this model is its 1135 A current class.

That current capacity places it toward the upper end of the PowerFlex 755 family and makes it suitable for motors requiring substantial current capacity.

The complete catalog number should be used when identifying or replacing the equipment. A similar PowerFlex 755 model may have different voltage, current, enclosure, input, braking, filtering, feedback, or control options.

---

2. Brand

Parameter	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Drive Type	AC Packaged Drive
Cooling	Air Cooled
Installation	Floor Mounted
Voltage Class	480 V AC
Phase	Three Phase
Rated Current	1135 A
Input Architecture	AFE Regenerative
Frame	Frame 9C
Enclosure Reference	IP54 / Type 12
HIM	Door Mounted
Main Function	Large-Motor Variable-Speed Control
Application Class	Heavy Industrial

The catalog information specifically identifies 20G1F3D1K1LNDNNNNN as a PowerFlex 755 air-cooled AC drive, with 480 VAC three-phase operation, AFE regenerative input, 1135 A rating, floor-mounted construction, and Frame 9C architecture.

---

3. Product Series

The product belongs to the PowerFlex 755 series.

PowerFlex 755 is a high-performance industrial AC drive family intended for applications requiring considerably more functionality and power capability than compact general-purpose VFDs.

The family includes a very broad range of current ratings and configurations.

High-current catalog numbers in the family include 920 A, 960 A, 1.0 kA-class, 1.1 kA-class, 1.3 kA-class, 1.4 kA-class, 1.6 kA-class, 2.0 kA-class and larger configurations.

The 20G1F3D1K1LNDNNNNN belongs to this large-drive portion of the PowerFlex 755 product family.

It is therefore particularly relevant to large industrial installations where the motor and mechanical system require substantially more power than a conventional compact VFD can provide.

---

4. Basic Product Parameters

Parameter	Specification
Model	20G1F3D1K1LNDNNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	High-Power AC Packaged Drive
Cooling	Air Cooled
Input Voltage	480 V AC
Input Phase	Three Phase
Rated Current	1135 A
Input Architecture	AFE Regenerative
Frame	Frame 9C
Enclosure	IP54 / Type 12 reference
Mounting	Floor Mount
HIM	Door Mounted
EMC	No EMC
Jumper Configuration	Jumper Removed
Dynamic Braking	None in identified configuration
Main Application	Large AC Motors
Approx. Cabinet Height	2477 mm
Approx. Cabinet Width	1200 mm
Approx. Cabinet Depth	800 mm
Approx. Weight	1287 kg
Cooling Method	Forced Air Cooling

The exact model listing identifies 1135 A, 480 VAC, three-phase, AFE regenerative, air-cooled operation and Frame 9C construction. It also identifies the IP54/Type 12 door-mounted HIM configuration.

---

5. Detailed Electrical Specifications

Electrical Parameter	Specification
Model	20G1F3D1K1LNDNNNNN
AC Input	480 V class
Input Phase	3 Phase
Rated Current	1135 A
Frequency	50/60 Hz system dependent
Input Architecture	AFE Regenerative
Output	Variable-frequency three-phase AC
Cooling	Air Cooled
Drive Class	High-Power Industrial
Frame	Frame 9C
Enclosure	IP54 / Type 12
Mounting	Floor Mounted
HIM	Door Mounted
EMC Filter	No EMC in identified configuration
Jumper	Removed in identified configuration
Dynamic Braking	None in identified configuration
Motor Type	Large Industrial AC Motors
Control Application	Variable-Speed Motor Control

The 1135 A current rating is the central electrical specification of this model.

At this current level, the drive is intended for large motors and high-power industrial equipment.

The actual motor selection should still be based on the motor’s nameplate current, voltage, speed, duty cycle, overload requirement, and application load rather than simply matching horsepower.

---

6. Power and Duty Classification

The identified catalog information associates the model with approximately 1000 HP normal-duty and 800 HP heavy-duty operation.

Duty Classification	Approximate Current	Approximate Motor Rating
Normal Duty	1135 A class	1000 HP
Heavy Duty	1135 A class configuration	800 HP

The approximate horsepower values correspond to:

Duty	Approx. HP	Approx. kW
Normal Duty	1000 HP	746 kW
Heavy Duty	800 HP	597 kW

These horsepower-to-kilowatt values are approximate mathematical conversions.

They should not be interpreted as a substitute for the drive’s complete published rating table.

The final engineering selection should always use the applicable current rating for the intended duty and the motor’s actual full-load current.

---

7. What Makes This Model a Large Industrial Drive

The 20G1F3D1K1LNDNNNNN is physically and electrically very different from compact VFDs.

A small machine drive may weigh only a few kilograms and be mounted inside a standard control cabinet.

This model belongs to a completely different class.

The drive uses a large floor-mounted cabinet arrangement and requires dedicated installation space.

The high current rating also means that power connections, bus structures, cooling equipment, protection systems, cable routing, grounding, and maintenance procedures must all be treated as major engineering considerations.

For a large industrial plant, this type of drive would normally be installed in a dedicated electrical room, motor-control area, drive room, or similar industrial space.

---

8. AFE Regenerative Architecture

The model is identified as an AFE regenerative PowerFlex 755 configuration.

AFE stands for Active Front End.

In a conventional drive, electrical energy generally travels from the AC supply through the drive to the motor.

During certain operating conditions, however, the motor can be driven by the mechanical load.

The motor then behaves partly like a generator and sends electrical energy back toward the drive.

A regenerative front-end arrangement can be used to manage this returned energy and transfer it toward the electrical supply.

This can be especially useful in:

• Downhill conveyors
• High-inertia machinery
• Hoisting systems
• Material-handling equipment
• Certain cranes
• Large rotating machinery
• Test equipment
• Overhauling loads
• Applications with frequent braking

The actual regenerative performance depends on the complete electrical and mechanical system.

The incoming power system, grounding, protection, harmonics, motor, mechanical load, control strategy, and operating cycle should all be evaluated together.

---

9. Air-Cooled Construction

The model uses an air-cooled architecture.

For a drive operating in the 1000 A-class range, thermal management becomes a major engineering issue.

Power semiconductor devices, bus components, reactors, filters, and other electrical components generate heat during normal operation.

The cooling system must therefore maintain adequate airflow and remove the generated heat from the cabinet.

The installation should take into account:

• Ambient temperature
• Room ventilation
• Airflow
• Dust
• Humidity
• Altitude
• Cooling fan condition
• Air passages
• Cabinet clearances
• Filter condition where applicable
• Heat generated by other electrical equipment

A large electrical room containing several high-power drives can generate substantial heat.

Room ventilation therefore needs to be designed around the total installed electrical load rather than the drive alone.

---

10. Enclosure and Protection

The identified configuration is associated with IP54 / Type 12 protection and a door-mounted HIM.

This type of enclosure is more substantial than a basic open or low-protection drive arrangement.

It is useful in industrial environments where additional protection from dust and environmental contamination is required.

However, the actual installation environment should still be evaluated.

IP54/Type 12 does not mean that the drive can simply be installed anywhere without environmental consideration.

The following should still be evaluated:

• Dust concentration
• Conductive contamination
• Humidity
• Condensation
• Ambient temperature
• Corrosive gases
• Salt exposure
• Chemical contamination
• Altitude
• Ventilation
• Maintenance requirements

---

11. Dimensions and Weight

Because this is a Frame 9 high-power packaged drive, the physical dimensions are substantial.

For the Frame 9 IP54/Type 12 cabinet family, a useful mechanical reference is approximately 2477 mm high × 1200 mm wide × 800 mm deep, with an approximate weight of 1287 kg.

Mechanical Parameter	Frame 9 IP54 / Type 12 Reference
Model	20G1F3D1K1LNDNNNNN
Frame	Frame 9C
Approx. Height	2477 mm
Approx. Width	1200 mm
Approx. Depth	800 mm
Approx. Weight	1287 kg
Mounting	Floor Mount
Cooling	Air Cooled
Enclosure	IP54 / Type 12
HIM	Door Mounted
Installation	Indoor Industrial Installation
Shipping Weight	Configuration dependent
Final Mechanical Size	Verify final cabinet drawing

The dimensions and weight above should be treated as Frame 9/IP54 family reference values rather than a guaranteed shipping measurement for every complete catalog-number configuration.

For a replacement project, the final mechanical drawing should be checked before preparing the foundation, transport route, lifting equipment, and cable-entry arrangement.

---

12. Installation Space

The approximately 2.477 m cabinet height is significant.

The installation area must provide adequate vertical clearance for:

• Cabinet ventilation
• Maintenance
• Door operation
• Cable installation
• Lifting
• Inspection
• Removal of internal components

The cabinet width also needs to be considered together with any additional disconnect, filter, bypass, line-side, or auxiliary sections.

A complete packaged-drive system can therefore occupy more floor space than the basic drive cabinet alone.

---

13. Floor Loading and Transportation

A weight of approximately 1287 kg makes transportation an important part of the installation plan.

The floor should be checked for the required static and dynamic loading.

The transportation route should also be inspected.

Important questions include:

• Can the cabinet pass through the available doors?
• Can the elevator support the equipment?
• Is the floor strong enough?
• Is a crane required?
• Is a forklift suitable?
• Is the center of gravity acceptable?
• Are there restrictions on cabinet orientation?
• Is temporary floor protection required?

For a replacement project, these questions should be answered before the drive arrives at the plant.

---

14. Main Product Applications

The 20G1F3D1K1LNDNNNNN is appropriate for large industrial motor applications.

Typical applications include:

• Mining conveyors
• Large crushers
• Cement equipment
• Aggregate processing
• Large pumps
• Mine ventilation fans
• Industrial blowers
• Large compressors
• Steel-processing equipment
• Material-handling systems
• Bulk-material conveyors
• Water-transfer systems
• Wastewater pumping
• Industrial process machinery
• High-inertia rotating equipment

---

15. Mining Applications

Mining is one of the most demanding environments for large electrical drives.

Large mining systems frequently use high-power motors for conveyors, crushers, pumps, ventilation fans, mills, and material-handling systems.

The 20G1F3D1K1LNDNNNNN can be applied to this general class of equipment when the motor current and environmental conditions are within the drive’s ratings.

For long conveyors, controlled acceleration can reduce mechanical shock.

For downhill conveyors, regenerative operation can become an important part of the electrical design.

For mine dewatering, variable-speed pump operation can provide adjustable flow.

For ventilation, variable-speed fans can adjust airflow according to operating requirements.

---

16. Large Conveyor Applications

Large conveyors can contain enormous mechanical inertia.

A fully loaded belt can require substantial torque during acceleration.

Starting the motor too aggressively can place additional stress on:

• Gearboxes
• Couplings
• Bearings
• Pulleys
• Shafts
• Belts
• Mechanical joints

A high-power VFD provides controlled acceleration rather than an uncontrolled transition from zero speed to operating speed.

This can provide a smoother mechanical starting sequence.

Variable-speed operation can also be used to coordinate material throughput.

For downhill conveyors, the load can potentially drive the motor during certain operating conditions.

This is where the regenerative architecture can become particularly useful.

---

17. Crusher Applications

Crushers are characterized by rapidly changing mechanical loads.

The material being processed can change in size, hardness, density, and quantity.

The drive therefore needs to operate reliably under changing motor load.

A high-power PowerFlex 755 drive can provide controlled speed and torque to the crusher motor.

Potential applications include:

• Primary crushers
• Secondary crushers
• Jaw crushers
• Cone crushers
• Gyratory crushers
• Aggregate-processing machinery
• Mineral-processing equipment

The actual speed and torque requirements should be determined from the crusher manufacturer’s operating specifications.

---

18. Large Pump Applications

Large pumps are another important application.

Variable-speed control allows the motor speed to be adjusted according to the required process flow.

Typical applications include:

• Mine dewatering
• Raw-water transfer
• Cooling-water systems
• Industrial circulation
• Wastewater
• Process water
• Irrigation
• Large pumping stations
• Water-transfer systems

A VFD can allow the pump to operate at different speeds rather than remaining at maximum speed continuously.

For centrifugal pumps, this can provide substantial process flexibility.

---

19. Large Fan Applications

Large industrial fans can require very high motor power.

Examples include:

• Mine ventilation
• Cement plant ventilation
• Furnace exhaust
• Dust collection
• Industrial extraction
• Process ventilation
• Cooling systems
• Large air-handling equipment

Variable-speed control allows the airflow to be adjusted according to the process requirement.

This can be useful where maximum airflow is not continuously required.

---

20. Blower Applications

Industrial blowers can also benefit from variable-speed operation.

Typical applications include:

• Process air
• Combustion air
• Wastewater aeration
• Pneumatic material systems
• Industrial exhaust
• Chemical processing
• Furnace systems

The drive can regulate motor speed while maintaining controlled acceleration and deceleration.

---

21. Compressor Applications

Large compressors can be considered for variable-frequency operation when the compressor design supports it.

Applications may include:

• Industrial compressed air
• Process gas
• Manufacturing utilities
• Gas handling
• Large refrigeration systems
• Chemical processing

Compressor applications require particular attention to operating speed range, lubrication, cooling, resonance, acceleration time, and minimum operating speed.

---

22. Cement Industry Applications

Cement plants use many high-power motor systems.

The 20G1F3D1K1LNDNNNNN can be considered for:

• Crushers
• Conveyors
• Large fans
• Blowers
• Pumps
• Material feeders
• Dust collection systems
• Process equipment
• Material handling

A common advantage of variable-speed control in this type of plant is the ability to adjust equipment speed according to production requirements.

---

23. Steel and Metal Processing

Steel and metal-processing plants frequently contain large motors operating under changing loads.

Applications may include:

• Large fans
• Cooling pumps
• Conveyors
• Material handling
• Process equipment
• Extraction systems
• Rolling-related machinery
• Auxiliary production equipment

The drive can be integrated into a larger automation system where motor speed, torque, process status, and alarms need to be monitored.

---

24. Water and Wastewater

Large water infrastructure can require motors in the hundreds of kilowatts.

Typical applications include:

• Raw-water pumps
• Booster pumps
• Transfer pumps
• Wastewater pumps
• Sludge-related systems
• Cooling-water systems
• Large circulation systems

Variable-speed operation allows the pumping system to respond to changing demand.

---

25. Material-Handling Applications

Material-handling systems often require smooth acceleration and deceleration.

Potential applications include:

• Bulk-material conveyors
• Transfer conveyors
• Storage systems
• Reclaim systems
• Port equipment
• Mining terminals
• Aggregate handling
• Industrial transport equipment

The high current rating makes this model appropriate for very large motors when the required duty falls within the drive’s rating.

---

26. Main Product Advantages

26.1 Very High Current Capacity

The 1135 A current rating is the most important characteristic of this model.

It provides a high-current platform for large AC motors.

This makes the drive suitable for applications where a smaller PowerFlex configuration cannot provide sufficient motor current.

---

26.2 High-Power Motor Control

The identified configuration is associated with approximately 1000 HP normal-duty and 800 HP heavy-duty operation.

This puts the drive into the large-motor industrial category.

---

26.3 AFE Regenerative Operation

The AFE architecture provides a solution for applications where energy can return from the mechanical load toward the electrical supply.

This is especially useful for applications involving:

• Frequent braking
• Overhauling loads
• High inertia
• Downhill conveyors
• Large rotating systems

---

26.4 Controlled Acceleration

Large machinery can experience considerable mechanical stress during starting.

The VFD allows acceleration to be controlled according to the process requirements.

---

26.5 Controlled Deceleration

The drive can control the reduction in motor speed rather than allowing a large mechanical system to coast down without coordinated control.

This is especially useful where process timing or mechanical stress is important.

---

26.6 Industrial Enclosure

The IP54/Type 12 arrangement provides a substantial cabinet structure for industrial installation.

This is useful where the electrical equipment needs greater environmental protection than an open-frame arrangement.

---

26.7 Floor-Mounted Architecture

The floor-mounted design is appropriate for large industrial electrical rooms.

It avoids the mechanical limitations associated with trying to mount a very large drive on a standard control-panel wall.

---

26.8 Door-Mounted HIM

The door-mounted HIM provides an operator interface at the front of the cabinet.

This can simplify local monitoring and adjustment during commissioning and maintenance.

---

26.9 Broad Application Range

The PowerFlex 755 family covers many different motor-control applications.

The same general drive architecture can therefore be used across pumps, fans, conveyors, compressors, crushers, and process machinery.

---

27. Motor Selection

The motor should be checked against the drive using actual electrical data.

Motor Parameter	Required Information
Motor Voltage	Confirm nameplate
Motor Current	Confirm nameplate
Motor Power	Confirm nameplate
Motor Frequency	Confirm 50/60 Hz requirement
Motor Speed	Confirm rated RPM
Motor Type	Confirm induction / synchronous / applicable type
Overload Requirement	Confirm application
Acceleration	Confirm required acceleration time
Deceleration	Confirm required deceleration time
Regeneration	Confirm whether required
Feedback	Confirm encoder/feedback requirement
Ambient	Confirm installation environment
Cooling	Confirm motor cooling method

The 1135 A drive rating should not be used as the only basis for motor selection.

The actual motor full-load current is one of the most important selection parameters.

---

28. Electrical Room Requirements

A drive of this size normally requires a dedicated installation area.

The electrical room should have:

• Adequate floor space
• Adequate floor loading
• Sufficient ventilation
• Appropriate temperature control
• Suitable grounding
• Adequate cable access
• Maintenance clearance
• Door-opening clearance
• Equipment lifting access
• Appropriate electrical protection
• Suitable environmental conditions

The cabinet dimensions and approximately 1287 kg reference weight make transportation and installation planning particularly important.

---

29. Maintenance

Maintenance should focus on both electrical and thermal conditions.

Typical inspection areas include:

• Cooling fans
• Air passages
• Cabinet ventilation
• Filters
• Power terminals
• Bus connections
• Ground connections
• Control wiring
• Communication wiring
• HIM condition
• Fault history
• Alarm history
• Signs of overheating
• Dust accumulation
• Abnormal noise
• Abnormal vibration

Because this is a high-current drive, electrical connections should be inspected carefully.

A loose connection can produce localized heating and eventually damage electrical components.

---

30. Five Related or Same-Series Models

The following models are closely related PowerFlex 755 high-power configurations and are useful for comparison with the target model.

Model	Series	Current Class	Voltage Class	Frame / Construction	Cooling	Approx. Dimensions	Approx. Weight
20G1F3D1K0LNDNNNNN	PowerFlex 755	1.0 kA class	480 V	Frame 9	Air cooled	Approx. 2477 × 1200 × 800 mm family reference	Approx. 1287 kg
20G1F3D1K1LNDNNNNN	PowerFlex 755	1.1 kA class / 1135 A	480 V	Frame 9C	Air cooled	Approx. 2477 × 1200 × 800 mm family reference	Approx. 1287 kg
20G1F3D1K3LNDNNNNN	PowerFlex 755	1.3 kA class	480 V class	Large Frame	Air cooled	Configuration dependent	Configuration dependent
20G1F3D1K4LNDNNNNN	PowerFlex 755	1.4 kA class	480 V class	Large Frame	Air cooled	Configuration dependent	Configuration dependent
20G1F3D2K0LNDNNNNN	PowerFlex 755	2.0 kA class	480 V class	Large Frame	Air cooled	Configuration dependent	Configuration dependent

These closely related high-power PowerFlex 755 catalog numbers are represented in the broader product-family listings.

The dimensions and weights for the larger configurations can vary substantially with cabinet arrangement and options.

---

31. Five Closely Related PowerFlex 755 Models

Model	Product Family	Approx. Current Class	Typical Application	Cooling	Frame	Dimensions	Weight
20G1F3D960LNDNNNNN	PowerFlex 755	960 A	Large conveyors, pumps, fans	Air cooled	Frame 9	Approx. 2477 × 1200 × 800 mm reference	Approx. 1287 kg reference
20G1F3D1K0LNDNNNNN	PowerFlex 755	1.0 kA class	Large industrial motors	Air cooled	Frame 9	Approx. 2477 × 1200 × 800 mm reference	Approx. 1287 kg reference
20G1F3D1K1LNDNNNNN	PowerFlex 755	1135 A	Very large industrial motors	Air cooled	Frame 9C	Approx. 2477 × 1200 × 800 mm reference	Approx. 1287 kg reference
20G1F3D1K3LNDNNNNN	PowerFlex 755	1.3 kA class	Very high-power machinery	Air cooled	Large Frame	Configuration dependent	Configuration dependent
20G1F3D2K0LNDNNNNN	PowerFlex 755	2.0 kA class	Extremely high-current systems	Air cooled	Large Frame	Configuration dependent	Configuration dependent

The family listing contains these 755 configurations across the high-current range.

---

32. Five Same-Brand Reference Models

For a broader comparison within the Allen-Bradley drive range, the following models represent different drive sizes and application classes.

Model	Series	Voltage Class	Current / Power Class	Typical Application	Cooling	Dimensions	Weight
25B-D2P3N114	PowerFlex 525	480 V class	Small-current class	Small pumps, fans, conveyors	Air cooled	Compact	Approx. 1–3 kg class
25B-D6P0N114	PowerFlex 525	480 V class	Small-current class	General machinery	Air cooled	Compact	Approx. 2–4 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 machinery	Air cooled	Approx. 2477 × 1200 × 800 mm reference	Approx. 1287 kg reference
20G1F3D1K1LNDNNNNN	PowerFlex 755	480 V	1135 A	Very large industrial machinery	Air cooled	Approx. 2477 × 1200 × 800 mm reference	Approx. 1287 kg reference

The smaller PowerFlex 525 and PowerFlex 753 models occupy different electrical and physical classes from the target model.

They are useful mainly as broader same-brand reference points rather than direct substitutes.

---

33. Comparison With 960 A PowerFlex 755

The 960 A configuration is one of the closest current-class comparisons.

Feature	20G1F3D960LNDNNNNN	20G1F3D1K1LNDNNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage Class	480 V	480 V
Current Class	960 A	1135 A
Cooling	Air cooled	Air cooled
Frame	Frame 9 class	Frame 9C
Enclosure	Configuration dependent	IP54 / Type 12
Mounting	Floor mounted	Floor mounted
AFE	Configuration dependent	Yes
Approx. Height	2477 mm reference	2477 mm reference
Approx. Width	1200 mm reference	1200 mm reference
Approx. Depth	800 mm reference	800 mm reference
Approx. Weight	1287 kg reference	1287 kg reference

The key difference is the higher 1135 A current class of the target model.

---

34. Comparison With 1.0 kA-Class Model

Parameter	20G1F3D1K0LNDNNNNN	20G1F3D1K1LNDNNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage Class	480 V	480 V
Current Class	Approximately 1.0 kA	1135 A
Cooling	Air cooled	Air cooled
Mounting	Floor mount	Floor mount
Frame	Frame 9 class	Frame 9C
AFE	Configuration dependent	AFE regenerative
Enclosure	Configuration dependent	IP54 / Type 12
Approx. Dimensions	Frame 9 class	2477 × 1200 × 800 mm reference
Approx. Weight	Approx. 1287 kg reference	Approx. 1287 kg reference

These two models are close in the high-current PowerFlex 755 range, but the complete catalog configuration should always be checked before considering substitution.

---

35. Advantages for Conveyor Systems

The 20G1F3D1K1LNDNNNNN is well suited to the general requirements of large conveyor systems.

Its high current capability allows it to control large motors.

Variable-speed operation provides control over conveyor speed.

Controlled acceleration can reduce mechanical shock.

Controlled deceleration can improve stopping behavior.

The regenerative architecture can also be relevant to downhill conveyor applications where the mechanical load can drive the motor.

Potential benefits include:

• Smooth starting
• Controlled stopping
• Adjustable speed
• Reduced mechanical shock
• High motor capacity
• Regenerative capability
• Automation integration

---

36. Advantages for Pump Systems

Large pumps often operate under changing process requirements.

Variable-speed control allows the pump motor to operate at different speeds.

Potential benefits include:

• Adjustable flow
• Adjustable pressure
• Controlled startup
• Controlled shutdown
• Reduced mechanical shock
• Process flexibility
• Automation integration
• Large motor compatibility

---

37. Advantages for Fan Systems

For large fans and blowers, motor speed can be adjusted according to the required airflow.

Potential benefits include:

• Variable airflow
• Controlled startup
• Controlled stopping
• Reduced mechanical shock
• Process flexibility
• High-power motor control
• Integration with plant automation

---

38. Advantages for Mining

Mining applications often require high-power motors and robust process control.

The drive can be considered for:

• Long conveyors
• Crushers
• Mine ventilation
• Dewatering
• Material handling
• Mineral processing
• Large pumps
• Bulk-material transport

The regenerative architecture is especially relevant when the mechanical system can drive the motor during portions of the operating cycle.

---

39. Advantages for Cement Plants

Cement plants contain many high-power machines.

Potential applications include:

• Crushers
• Fans
• Conveyors
• Pumps
• Blowers
• Material feeders
• Dust extraction
• Material-handling equipment

The ability to vary motor speed can help match the motor to changing process requirements.

---

40. Advantages for Steel and Metals

Large steel and metal-processing facilities can use high-power motor drives for:

• Cooling systems
• Pumps
• Fans
• Conveyors
• Extraction
• Material handling
• Process machinery

The drive can form part of an automated system where motor speed and process conditions are controlled centrally.

---

41. Advantages for High-Inertia Machinery

High-inertia machinery stores considerable mechanical energy.

Examples include:

• Large fans
• Flywheel systems
• Large rotating equipment
• Certain mills
• Large conveyors
• Centrifugal machinery

During acceleration, substantial torque may be required.

During deceleration, substantial energy may return from the mechanical system.

A high-power AFE drive is therefore particularly relevant to systems where both acceleration and regenerative deceleration need to be engineered carefully.

---

42. Selection Checklist

Before selecting or replacing the model, verify the following parameters.

Selection Parameter	Requirement
Model	20G1F3D1K1LNDNNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Input Voltage	480 V AC
Phase	Three Phase
Current	1135 A
Normal-Duty Motor Class	Approximately 1000 HP
Heavy-Duty Motor Class	Approximately 800 HP
Input Architecture	AFE Regenerative
Cooling	Air Cooled
Frame	Frame 9C
Enclosure	IP54 / Type 12
Mounting	Floor Mount
HIM	Door Mounted
EMC	No EMC
Jumper	Removed
Motor Current	Verify nameplate
Motor Voltage	Verify nameplate
Motor Frequency	Verify nameplate
Motor Speed	Verify nameplate
Load Type	Verify application
Overload	Verify application
Regeneration	Verify application
Approx. Height	2477 mm
Approx. Width	1200 mm
Approx. Depth	800 mm
Approx. Weight	1287 kg
Installation	Industrial Electrical Room
Ventilation	Required
Floor Loading	Must be verified
Transportation	Must be planned

---

43. Detailed Final Parameter Table

Parameter	Detailed Specification
Product Model	20G1F3D1K1LNDNNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Category	High-Power AC Variable Frequency Drive
Product Type	Air-Cooled AC Packaged Drive
Input Voltage	480 V AC
Input Phase	Three Phase
Rated Current	1135 A
Normal-Duty Rating	Approximately 1000 HP
Heavy-Duty Rating	Approximately 800 HP
Normal-Duty Power	Approximately 746 kW
Heavy-Duty Power	Approximately 597 kW
Input Architecture	AFE Regenerative
Cooling	Air Cooled
Mounting	Floor Mounted
Frame	Frame 9C
Enclosure	IP54 / Type 12
HIM	Door Mounted
EMC	No EMC
Jumper	Removed
Dynamic Braking	None in identified configuration
Typical Application	Large AC Motor Control
Mining Application	Conveyors, crushers, pumps, fans
Cement Application	Crushers, conveyors, fans, pumps
Pump Application	Large water and process pumps
Fan Application	Mine and industrial ventilation
Compressor Application	Large industrial compressors
Material Handling	Bulk conveyors and transfer systems
Approx. Height	2477 mm
Approx. Width	1200 mm
Approx. Depth	800 mm
Approx. Weight	1287 kg
Mounting Style	Floor Mount
Protection Class	IP54 / Type 12 reference
Cooling Environment	Industrial Forced-Air Cooling
Installation Area	Electrical Room / Drive Room
Shipping Weight	Configuration dependent
Final Dimensions	Verify final mechanical drawing
Motor Selection	Based on actual motor current and duty
Replacement Selection	Verify complete catalog number and options

The exact product information supports the 480 V, three-phase, 1135 A, AFE regenerative, air-cooled, Frame 9C and IP54/Type 12 configuration.

The broader PowerFlex 755 catalog family contains the 1.0 kA, 1.1 kA, 1.3 kA, 1.4 kA, 1.6 kA, 2.0 kA and other high-current configurations used for comparison above.

---

44. Overall Product Summary

The Allen-Bradley 20G1F3D1K1LNDNNNNN is a very high-power industrial AC drive belonging to the PowerFlex 755 series.

It is designed for large three-phase AC motor applications where very high current capacity and industrial variable-speed control are required.

The model is associated with a 480 V AC three-phase supply and 1135 A current rating, together with an AFE regenerative input architecture.

Its large current capacity makes it appropriate for substantial industrial motors.

The model is particularly relevant to applications such as mining conveyors, large crushers, cement equipment, industrial fans, large pumps, compressors, material-handling systems, and other high-power process machinery.

The AFE regenerative configuration is useful for applications in which mechanical energy can be returned through the motor during braking or overhauling operation.

This is particularly relevant to downhill conveyors and other systems where the load can drive the motor.

The drive’s air-cooled architecture is suitable for large industrial electrical-room installations, provided that the room has sufficient ventilation and heat-removal capacity.

The Frame 9C construction also makes this a physically large piece of equipment.

A useful IP54/Type 12 Frame 9 reference is approximately 2477 mm high, 1200 mm wide, and 800 mm deep, with an approximate weight of 1287 kg.

These mechanical values should be confirmed against the final configuration drawing before installation because cabinet options and associated equipment can change the overall dimensions and weight.

The large physical size means that transportation and installation should be planned carefully.

Floor loading, lifting equipment, access routes, cabinet clearances, cable routing, ventilation, maintenance access, and electrical-room layout should all be considered.

The product is also a good example of why complete catalog-number matching is important.

A PowerFlex 755 model with a similar current rating may have a different input arrangement, enclosure, braking arrangement, filter configuration, HIM configuration, feedback option, or mechanical construction.

Therefore, 20G1F3D1K1LNDNNNNN should be treated as a specific configuration rather than simply as a generic 1135 A PowerFlex 755.

For applications requiring very high motor power, the most important selection criteria are motor voltage, motor current, duty classification, acceleration requirements, overload requirements, regenerative behavior, environmental conditions, enclosure requirements, and available installation space.

When those factors are correctly matched, the 20G1F3D1K1LNDNNNNN provides a high-capacity platform for large industrial AC motor control.

It is particularly suited to heavy industrial environments where motor speed needs to be controlled as part of a larger automated process rather than simply switched on and off.

Overall, the Allen-Bradley 20G1F3D1K1LNDNNNNN PowerFlex 755 can be characterized as a high-current, air-cooled, floor-mounted, regenerative industrial AC drive for very large motor applications, with a 480 V three-phase electrical class, 1135 A current capability, Frame 9C construction, and IP54/Type 12 enclosure configuration.