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1. Product Overview

The 20G11LF1K0AN0NNNNN is a high-power AC variable frequency drive belonging to the PowerFlex 755 family.

It is designed for large three-phase industrial motors and is intended for applications where high motor power, adjustable speed, controlled acceleration and integration with an industrial automation system are required.

This particular configuration is part of the very-high-power range of the PowerFlex 755 family. It is rated for 690 VAC, with a current capacity of approximately 1040 A.

Its rated power capability is approximately:

• 1,100 kW Light Duty
• 1,000 kW Normal Duty
• 900 kW Heavy Duty

The drive uses an air-cooled design and an 800 mm deep MCC-style mechanical arrangement.

Because of its very high power rating, this product is intended for large industrial installations rather than ordinary small machinery.

Typical applications include large pumps, fans, blowers, compressors, conveyors, crushers, mixers, mining equipment, material-handling systems and other large process machines.

2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Model	20G11LF1K0AN0NNNNN
Product Type	High-Power AC Variable Frequency Drive
Drive Configuration	Air-Cooled AC Drive
Voltage Class	690 VAC
Phase	3 Phase
Current Rating	1040 A
Light-Duty Rating	1,100 kW
Normal-Duty Rating	1,000 kW
Heavy-Duty Rating	900 kW
Frame	Frame 10
Cooling	Forced Air
Installation Style	MCC Style
Enclosure Class	Type 1 / IP20
Depth	800 mm
Communication	Embedded EtherNet/IP
Dynamic Braking	None in this configuration
HIM	Blank / No HIM in this configuration

3. Main Technical Parameters

Parameter	Specification
Model	20G11LF1K0AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Input	AC input with precharge
Phase	3 Phase
Current	1040 A
Light Duty	1,100 kW
Normal Duty	1,000 kW
Heavy Duty	900 kW
Frame	Frame 10
Cooling	Air Cooled / Forced Air
Enclosure	Type 1 / IP20
Installation	800 mm Deep MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight	Configuration-dependent
Weight (kg)	Configuration-dependent
Dynamic Braking	None
Input Type	AC Input with Precharge
DC Terminals	Included
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM
Typical Motor Type	Three-Phase AC Motor
Application Level	Very High Power Industrial

4. Product Model Interpretation

The catalog number 20G11LF1K0AN0NNNNN identifies a particular configuration of the PowerFlex 755 high-power AC drive.

The model incorporates several important configuration characteristics, including the PowerFlex 755 family, AC input arrangement, high-voltage class, very-high-current rating and mechanical installation format.

The F voltage designation in this configuration corresponds to the 690 VAC class.

The 1K0 portion represents the approximately 1040 A current class.

The complete catalog number should be retained when purchasing or replacing the unit because small changes in the catalog number can represent different filtering, enclosure, mounting or other configuration characteristics.

5. Electrical Rating

The most important electrical characteristic of the 20G11LF1K0AN0NNNNN is its 1040 A current rating.

This is an extremely high current rating for an industrial variable frequency drive.

The drive is intended for large motors and large process equipment.

Its power ratings are:

Duty	Power Rating
Light Duty	1,100 kW
Normal Duty	1,000 kW
Heavy Duty	900 kW
Current	1040 A
Voltage	690 VAC
Phase	3 Phase

6. Light-Duty Rating

The Light-Duty rating is approximately 1,100 kW.

Light-Duty operation is generally associated with applications where the motor does not continuously experience severe overload conditions.

Typical examples can include large fans, blowers and selected pumping systems where the actual load characteristics are compatible with the drive’s Light-Duty rating.

The motor nameplate current and the actual process load should always be checked before final selection.

7. Normal-Duty Rating

The Normal-Duty rating is approximately 1,000 kW.

This rating is suitable for many standard industrial processes where the motor operates under a relatively predictable load profile.

Potential applications include:

• Large pumps
• Industrial fans
• Blowers
• Conveyors
• Process equipment
• Large material-handling machinery

8. Heavy-Duty Rating

The Heavy-Duty rating is approximately 900 kW.

Heavy-duty applications require greater consideration of overload and torque requirements.

Examples can include:

• Crushers
• Heavy conveyors
• Large mixers
• Mining machinery
• High-inertia equipment
• Material-processing equipment

For these applications, the actual mechanical load profile should be evaluated rather than selecting the drive based only on motor horsepower.

9. Product Introduction

The 20G11LF1K0AN0NNNNN is a large industrial variable frequency drive designed to control the speed and operation of high-power three-phase AC motors.

A conventional motor starter mainly provides starting and stopping.

A variable frequency drive provides a much wider range of motor-control functions.

The basic power flow can be understood as:

Three-Phase AC Supply → AC Drive → Three-Phase Motor → Industrial Machine

The drive electronically controls the voltage and frequency supplied to the motor.

This allows the motor to operate at different speeds according to process requirements.

For a large industrial system, this can provide much better control than simply running the motor continuously at full speed.

10. High-Power Motor Control

Large motors can create significant electrical and mechanical stress during starting.

Direct starting can produce high current and substantial mechanical shock.

The variable frequency drive can gradually increase motor speed.

This controlled acceleration can reduce sudden mechanical loading on:

• Motor shafts
• Couplings
• Gearboxes
• Belts
• Bearings
• Pulleys
• Conveyor systems
• Pump systems

11. Main Applications

11.1 Large Pump Systems

Large pumping systems are an important application area for high-power drives.

The drive can adjust motor speed according to the process requirement.

Potential applications include:

• Water transfer
• Industrial water circulation
• Cooling-water systems
• Process-water systems
• Wastewater systems
• Mining dewatering
• Industrial pumping
• Large-scale irrigation
• Process pumps

Pump Application Advantages

Function	Potential Benefit
Variable Speed	Adjusts pump operation to demand
Controlled Start	Reduces starting shock
Flow Control	Supports variable flow requirements
Pressure Control	Allows pressure-based operation
Reduced Cycling	Can reduce unnecessary starts and stops
Automation	Allows centralized control
Monitoring	Provides operating information to the control system

12. Large Fan and Blower Systems

Large industrial fans and blowers often require high-power motors.

A variable frequency drive can adjust motor speed according to airflow requirements.

Typical applications include:

• Industrial ventilation
• Furnace ventilation
• Dust collection
• Exhaust systems
• Process-air systems
• Cooling systems
• Mining ventilation
• Large air-handling systems

13. Conveyor Systems

Large conveyors can contain considerable mechanical inertia.

Starting a conveyor with a very large motor can create significant mechanical stress.

Controlled acceleration can provide smoother startup characteristics.

Potential applications include:

• Mining conveyors
• Ore conveyors
• Bulk-material conveyors
• Cement conveyors
• Aggregate conveyors
• Long-distance conveyors
• Heavy material-handling systems

Conveyor Advantages

Function	Benefit
Controlled Acceleration	Reduces sudden starting shock
Adjustable Speed	Controls material flow
Smooth Operation	Reduces mechanical stress
Process Coordination	Allows synchronization with production
Network Integration	Supports centralized automation
Monitoring	Allows operating conditions to be observed

14. Mining Applications

The high current and power capability make this type of drive suitable for consideration in large mining installations.

Possible applications include:

• Large conveyors
• Dewatering pumps
• Ventilation fans
• Crushers
• Material-handling equipment
• Mineral-processing equipment
• Ore-handling systems
• Large process machinery

15. Crusher Applications

Crushers can experience rapidly changing mechanical loads.

When hard material enters the crushing mechanism, torque requirements can increase significantly.

A high-power variable frequency drive can provide controlled starting and speed management.

Potential applications include:

• Mining crushers
• Aggregate crushers
• Mineral-processing equipment
• Cement-processing equipment
• Bulk-material processing systems

16. Compressor Applications

Large industrial compressors can require very high motor power.

Variable-speed control allows the compressor motor to operate according to process demand.

Potential applications include:

• Process compressors
• Industrial air systems
• Gas-processing equipment
• Large process plants
• Industrial production systems

17. Mixer Applications

Large mixers may require substantial starting torque, especially when material is already present in the mixing chamber.

A variable frequency drive can provide controlled acceleration and adjustable operating speed.

Potential applications include:

• Chemical processing
• Cement production
• Mineral processing
• Industrial mixing
• Bulk-material processing
• Process manufacturing

18. Material-Handling Applications

The drive can be used in large material-handling systems where motor speed and acceleration need to be controlled.

Potential applications include:

• Heavy conveyors
• Transfer equipment
• Bulk-material systems
• Mining material handling
• Production equipment
• Large industrial processing systems

19. Main Product Advantages

19.1 Extremely High Current Capacity

The 1040 A rating is one of the primary characteristics of this model.

It places the drive in a very high-power industrial category.

This makes it suitable for motors that are far beyond the capacity of compact or medium-sized AC drives.

19.2 High Power Capability

The drive provides three important power levels:

Duty	Rating
Light Duty	1,100 kW
Normal Duty	1,000 kW
Heavy Duty	900 kW

This allows the same basic drive family to be considered for different load profiles.

19.3 Adjustable Motor Speed

The drive can vary motor speed according to process requirements.

This is useful for:

• Pumps
• Fans
• Blowers
• Conveyors
• Mixers
• Compressors
• Processing equipment

19.4 Controlled Acceleration

Controlled acceleration is especially valuable for large motors.

Gradual acceleration can help reduce sudden torque transmission through the mechanical system.

This may reduce stress on:

• Gearboxes
• Shafts
• Couplings
• Belts
• Bearings
• Conveyor structures

19.5 Industrial Network Integration

The PowerFlex 755 architecture supports industrial automation integration.

Embedded EtherNet/IP allows the drive to exchange information with a compatible automation controller.

Typical information can include:

Information	Purpose
Start Command	Starts motor operation
Stop Command	Stops motor operation
Speed Reference	Sets desired speed
Actual Speed	Provides speed feedback
Output Frequency	Indicates drive operating frequency
Current	Indicates motor loading
Status	Indicates operating condition
Warning	Indicates abnormal conditions
Fault	Indicates drive fault
Diagnostic Data	Supports maintenance

20. Air-Cooled Construction

The 20G11LF1K0AN0NNNNN uses an air-cooled design.

At this power level, heat management is a major consideration.

The cooling system uses forced airflow to remove heat generated by the power electronics.

The installation should therefore provide suitable:

• Airflow
• Ventilation
• Cabinet clearance
• Ambient temperature control
• Dust management
• Cooling-fan maintenance
• Air inlet clearance
• Air outlet clearance

21. Enclosure and Installation

This configuration is associated with a Type 1 / IP20 installation arrangement.

It is intended for installation inside a suitably protected industrial electrical environment.

The drive should not be treated as a weatherproof outdoor device.

The installation environment should be evaluated for:

• Dust
• Moisture
• Temperature
• Humidity
• Corrosive substances
• Air contamination
• Ventilation
• Altitude
• Maintenance access

22. Mechanical Dimensions

One of the clearly defined mechanical characteristics of this configuration is its 800 mm deep MCC-style construction.

Mechanical Parameter	Specification
Frame	Frame 10
Installation Style	MCC Style
Enclosure	Type 1 / IP20
Cooling	Forced Air
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Service Clearance	Installation-dependent
Cable Space	Installation-dependent

23. Weight

Because this is a large high-power drive configuration, the complete physical weight can depend on the final assembly and configuration.

For this reason, a fabricated kilogram figure should not be used for lifting, transportation or floor-loading calculations.

The requested weight information is therefore presented as follows:

Weight Parameter	Value
Drive Weight	Configuration-dependent
Shipping Weight	Configuration-dependent
Cabinet Assembly Weight	Configuration-dependent
Installed Assembly Weight	Configuration-dependent
Weight (kg)	Configuration-dependent

For engineering and installation purposes, the actual mechanical configuration should always be used.

24. Electrical Characteristics

Electrical Parameter	Specification
Voltage Class	690 VAC
Phase	3 Phase
Current	1040 A
Light-Duty Power	1,100 kW
Normal-Duty Power	1,000 kW
Heavy-Duty Power	900 kW
Input Type	AC Input with Precharge
DC Terminals	Included
Cooling	Forced Air
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Motor Type	Three-Phase AC Motor

25. Automation Integration

The drive can be incorporated into a larger industrial automation system.

A typical architecture can be represented as:

Operator Interface

↓

Industrial Controller

↓

Industrial Ethernet Network

↓

PowerFlex 755 Drive

↓

Large AC Motor

↓

Industrial Machine

This allows the motor to become part of a coordinated production system.

For example, a controller can adjust conveyor speed according to production requirements.

A pump can be controlled according to pressure or flow.

A fan can be adjusted according to airflow or temperature.

26. Process Control

A high-power drive can provide much more than simple motor starting and stopping.

It can become an active component of process control.

Equipment	Possible Control Objective
Pump	Flow / Pressure
Fan	Airflow
Conveyor	Material Speed
Compressor	Process Capacity
Mixer	Mixing Speed
Blower	Air Volume
Process Machine	Production Speed

27. Energy Efficiency Potential

Variable-speed control can provide energy-saving opportunities in suitable applications.

This is particularly important for variable-torque loads such as pumps and fans.

If a process does not require full motor speed, reducing speed can reduce energy consumption.

The actual energy-saving result depends on:

• Motor efficiency
• Load profile
• Operating hours
• Required speed range
• Pump or fan characteristics
• Mechanical efficiency
• Control strategy
• Process requirements

28. Maintenance Advantages

The drive can provide operational and diagnostic information that can assist maintenance personnel.

Maintenance teams can monitor:

• Drive status
• Fault conditions
• Warning conditions
• Motor current
• Output frequency
• Operating speed
• Communication condition
• Recurring fault conditions

This can support preventive maintenance and troubleshooting.

29. Installation Considerations

Before installing the 20G11LF1K0AN0NNNNN, the following points should be reviewed.

Installation Item	Consideration
Supply Voltage	Confirm compatibility with 690 VAC class
Motor Voltage	Confirm motor nameplate voltage
Motor Current	Compare with 1040 A capacity
Motor Power	Compare with duty rating
Duty	Light, Normal or Heavy Duty
Load Type	Variable torque / Constant torque
Starting Torque	Determine actual requirement
Overload	Confirm required overload
Acceleration	Determine required acceleration time
Deceleration	Determine stopping requirements
Braking	Evaluate whether external braking is required
Cooling	Confirm sufficient airflow
Environment	Check temperature and contamination
Cabinet Space	Confirm installation dimensions
Depth	800 mm
Width	Confirm exact configuration
Height	Confirm exact configuration
Weight (kg)	Confirm actual assembly weight
Network	Confirm automation architecture
Grounding	Confirm plant grounding
Cable Routing	Maintain suitable power/control separation

30. Five Same-Series or Closely Related Models

The following five models are suitable for comparison when selecting a PowerFlex 755 high-power drive.

Model	Series	Voltage Class	Current	Power Rating / Class	Depth	Weight (kg)
20G11LF795AN0NNNNN	PowerFlex 755	690 VAC	795 A	900 kW LD class	800 mm	Configuration-dependent
20G11LF960AN0NNNNN	PowerFlex 755	690 VAC	960 A	1,000 kW LD class	800 mm	Configuration-dependent
20G11LF1K0AN0NNNNN	PowerFlex 755	690 VAC	1040 A	1,100 kW LD / 1,000 kW ND / 900 kW HD	800 mm	Configuration-dependent
20G11LF1K4AN0NNNNN	PowerFlex 755	690 VAC	1400 A	1,500 kW LD class	800 mm	Configuration-dependent
20G11LF1K5AN0NNNNN	PowerFlex 755	690 VAC	1480 A	1,500 kW class	800 mm	Configuration-dependent

31. Related Model — 20G11LF795AN0NNNNN

This model has a lower current capacity than the main 1040 A unit.

It can be considered where the motor’s current requirement is lower while retaining the same general high-power PowerFlex 755 platform.

Parameter	20G11LF795AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	795 A
Application	Large Industrial Motor
Cooling	Air Cooled
Installation	MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Industrial Network Compatible

32. Related Model — 20G11LF960AN0NNNNN

The 960 A model is particularly close to the 1040 A version in current capacity.

It may be suitable where the motor current is below the 1040 A requirement.

Parameter	20G11LF960AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	960 A
Application	Large Industrial Motor
Cooling	Air Cooled
Installation	MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Industrial Network Compatible

33. Related Model — 20G11LF1K0AN0NNNNN

This is the main product discussed in this document.

Parameter	20G11LF1K0AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Phase	3 Phase
Current	1040 A
Light Duty	1,100 kW
Normal Duty	1,000 kW
Heavy Duty	900 kW
Frame	Frame 10
Cooling	Forced Air
Enclosure	Type 1 / IP20
Installation	MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP
Dynamic Braking	None

34. Related Model — 20G11LF1K4AN0NNNNN

This model has a substantially higher current capacity.

It can be considered for applications requiring more than the 1040 A capacity of the main model.

Parameter	20G11LF1K4AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	1400 A
Light-Duty Rating	Approximately 1,500 kW
Normal-Duty Rating	Approximately 1,400 kW
Heavy-Duty Rating	Approximately 1,120 kW
Cooling	Air Cooled
Installation	MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Application	Very Large Industrial Motors

35. Related Model — 20G11LF1K5AN0NNNNN

This is another very-high-capacity PowerFlex 755 configuration.

It provides a higher current class than the main 1040 A model.

Parameter	20G11LF1K5AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	1480 A
Power Class	Approximately 1,500 kW range
Cooling	Air Cooled
Installation	MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Application	Very Large Industrial Motor Systems

36. Five Popular Models from the Same Brand

For a broader product comparison, the following models represent different power levels and product families.

Model	Product Family	Voltage Class	Current / Size Class	Typical Application	Dimensions	Weight (kg)
25B-D010N104	PowerFlex 525	480 VAC class	10 A class	Small machinery	Compact / configuration-dependent	Configuration-dependent
25B-D017N104	PowerFlex 525	480 VAC class	17 A class	Small and medium machinery	Compact / configuration-dependent	Configuration-dependent
25B-D027N114	PowerFlex 525	480 VAC class	27 A class	Medium machinery	Compact / configuration-dependent	Configuration-dependent
20F11ND077AA0NNNNN	PowerFlex 753	480 VAC class	77 A class	Medium and large machinery	Frame-dependent	Configuration-dependent
20G11LF1K0AN0NNNNN	PowerFlex 755	690 VAC	1040 A	Very large industrial machinery	800 mm depth; exact width/height configuration-dependent	Configuration-dependent

37. 25B-D010N104

The 25B-D010N104 belongs to the PowerFlex 525 family and is positioned at a much smaller power level.

It is intended for compact industrial equipment rather than very large motors.

Parameter	25B-D010N104
Series	PowerFlex 525
Voltage Class	480 VAC class
Current Class	10 A class
Product Type	Compact AC Drive
Typical Application	Small industrial machinery
Dimensions	Compact / configuration-dependent
Weight (kg)	Configuration-dependent
Cooling	Configuration-dependent
Communication	Industrial communication capability
Application Scale	Small to Medium Machinery

38. 25B-D017N104

This model provides a higher current level within the compact PowerFlex 525 family.

It is suitable for a variety of general industrial machinery applications.

Parameter	25B-D017N104
Series	PowerFlex 525
Voltage Class	480 VAC class
Current Class	17 A class
Product Type	Compact AC Drive
Typical Application	Small / Medium Machinery
Dimensions	Compact / configuration-dependent
Weight (kg)	Configuration-dependent
Cooling	Configuration-dependent
Application Scale	Small to Medium Machinery

39. 25B-D027N114

This model is a higher-capacity PowerFlex 525 configuration.

It can be used for general industrial machinery where the motor is substantially smaller than the 1040 A high-power drive.

Parameter	25B-D027N114
Series	PowerFlex 525
Voltage Class	480 VAC class
Current Class	27 A class
Product Type	Compact AC Drive
Typical Application	General Industrial Machinery
Dimensions	Compact / configuration-dependent
Weight (kg)	Configuration-dependent
Cooling	Configuration-dependent
Application Scale	Medium Machinery

40. 20F11ND077AA0NNNNN

This model belongs to the PowerFlex 753 family.

It is considerably smaller than the 20G11LF1K0AN0NNNNN but is suitable for many medium and large industrial applications.

Parameter	20F11ND077AA0NNNNN
Series	PowerFlex 753
Voltage Class	480 VAC class
Current Class	77 A class
Product Type	Industrial AC Drive
Typical Application	Medium / Large Machinery
Cooling	Forced Air / Configuration-dependent
Dimensions	Frame-dependent
Weight (kg)	Frame-dependent
Communication	Industrial Network Options
Typical Applications	Pumps, Fans, Conveyors and Process Machinery

41. 20G11LF1K0AN0NNNNN

This is the main high-power model.

It occupies the very-high-power range of the PowerFlex 755 family.

Parameter	20G11LF1K0AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Phase	3 Phase
Current	1040 A
Light Duty	1,100 kW
Normal Duty	1,000 kW
Heavy Duty	900 kW
Frame	Frame 10
Cooling	Forced Air
Enclosure	Type 1 / IP20
Installation	800 mm Deep MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP
Dynamic Braking	None

42. Comparison of Same-Series High-Power Models

Parameter	20G11LF795AN0NNNNN	20G11LF960AN0NNNNN	20G11LF1K0AN0NNNNN	20G11LF1K4AN0NNNNN	20G11LF1K5AN0NNNNN
Series	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage	690 VAC	690 VAC	690 VAC	690 VAC	690 VAC
Current	795 A	960 A	1040 A	1400 A	1480 A
Power Class	High Power	High Power	Very High Power	Very High Power	Very High Power
Cooling	Air Cooled	Air Cooled	Air Cooled	Air Cooled	Air Cooled
Installation	MCC Style	MCC Style	MCC Style	MCC Style	MCC Style
Depth	800 mm	800 mm	800 mm	800 mm	800 mm
Width	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent
Height	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent
Weight (kg)	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent

43. Comparison of Different Product Families

Parameter	25B-D010N104	25B-D017N104	25B-D027N114	20F11ND077AA0NNNNN	20G11LF1K0AN0NNNNN
Product Family	PowerFlex 525	PowerFlex 525	PowerFlex 525	PowerFlex 753	PowerFlex 755
Voltage Class	480 VAC	480 VAC	480 VAC	480 VAC	690 VAC
Current Class	10 A	17 A	27 A	77 A	1040 A
Application Scale	Small	Small / Medium	Medium	Medium / Large	Very Large
Cooling	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	Forced Air
Installation	Compact	Compact	Compact	Frame-dependent	MCC Style
Depth	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	800 mm
Width	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent
Height	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent
Weight (kg)	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent	Configuration-dependent

44. Why Choose the 20G11LF1K0AN0NNNNN?

The main reason for selecting this model is its combination of very high current capacity, high motor power capability and industrial variable-speed control.

It is particularly appropriate when the application requires:

1. A large 690 VAC three-phase motor.
2. Current capacity around 1040 A.
3. Up to approximately 1,100 kW Light-Duty operation.
4. Up to approximately 1,000 kW Normal-Duty operation.
5. Up to approximately 900 kW Heavy-Duty operation.
6. Adjustable motor speed.
7. Controlled acceleration.
8. Industrial network integration.
9. Large-scale process control.
10. Centralized motor monitoring.

45. Advantages Compared with Conventional Motor Starting

Function	Conventional Starter	20G11LF1K0AN0NNNNN
Start / Stop	Yes	Yes
Adjustable Speed	No	Yes
Controlled Acceleration	Limited	Yes
Process Speed Control	No	Yes
Motor Operating Data	Limited	Yes
Industrial Network Integration	Limited	Yes
Drive Diagnostics	No	Yes
Large Motor Control	Yes	Yes
Centralized Monitoring	Limited	Yes
Energy Optimization Potential	Limited	Yes

46. Advantages for Pump Applications

For a large pump, continuous full-speed operation is not always necessary.

The drive allows motor speed to be adjusted according to actual process demand.

Potential benefits include:

• Improved flow control
• Pressure control
• Smoother starting
• Reduced mechanical shock
• Better process flexibility
• Potential energy savings
• Centralized automation
• Improved operating visibility

47. Advantages for Conveyor Applications

Large conveyors can have high inertia and significant mechanical loading.

Controlled acceleration allows the conveyor to reach operating speed progressively.

Potential benefits include:

• Reduced starting shock
• Smoother belt acceleration
• Reduced mechanical stress
• Better production control
• Adjustable material throughput
• Improved coordination with upstream and downstream equipment

48. Advantages for Fan Applications

Fans and blowers often operate at different load levels depending on process conditions.

Variable-speed operation can allow the fan to match airflow to actual demand.

Potential benefits include:

• Adjustable airflow
• Controlled startup
• Reduced unnecessary full-speed operation
• Better process regulation
• Centralized monitoring
• Automated control

49. Advantages for Large Industrial Plants

A large variable frequency drive can serve as an important component within an industrial automation architecture.

The drive can receive commands from a control system and return operating information.

This makes it possible to monitor large motors from a centralized operator interface.

For large plants, this can simplify the management of multiple high-power motor systems.

50. Maintenance and Reliability Considerations

A high-power drive should be incorporated into a structured maintenance program.

Recommended maintenance areas include:

• Cooling fans
• Airflow paths
• Electrical connections
• Power terminals
• Control wiring
• Grounding
• Cabinet cleanliness
• Network connections
• Fault history
• Warning history
• Motor current
• Operating temperature
• Environmental conditions

51. Environmental Considerations

The installation environment is important for a large air-cooled drive.

Excessive dust can restrict airflow.

High ambient temperature can increase thermal stress.

Moisture and condensation can create electrical problems.

The following conditions should therefore be evaluated:

Environmental Factor	Importance
Ambient Temperature	Affects thermal performance
Dust	Can restrict cooling airflow
Humidity	Can affect insulation
Condensation	Can create electrical problems
Corrosive Atmosphere	Can affect components
Ventilation	Required for air cooling
Altitude	Can affect thermal performance
Cabinet Clearance	Required for service and airflow
Maintenance Access	Required for inspection

52. Application Selection Guide

Application	Suitability
Large Pump	Excellent candidate
Large Fan	Excellent candidate
Large Blower	Excellent candidate
Heavy Conveyor	Excellent candidate
Mining Conveyor	Excellent candidate
Crusher	Potentially suitable
Large Mixer	Potentially suitable
Compressor	Potentially suitable
Material Handling	Potentially suitable
Small Machinery	Not normally appropriate

53. Product Selection Checklist

Before selecting this drive for a specific machine, engineers should confirm:

Motor Information

• Motor voltage
• Motor current
• Motor power
• Motor frequency
• Motor speed
• Motor service factor
• Motor insulation system
• Motor cooling arrangement

Load Information

• Continuous load
• Starting torque
• Peak torque
• Acceleration time
• Deceleration time
• Inertia
• Operating speed range
• Regeneration requirements

Electrical Information

• Incoming voltage
• Short-circuit conditions
• Grounding arrangement
• Protection requirements
• Cable size
• Motor cable length
• Harmonic requirements

Mechanical Information

• Available cabinet space
• 800 mm depth requirement
• Width
• Height
• Service clearance
• Cable entry
• Lifting arrangement
• Actual equipment weight

Automation Information

• Controller type
• EtherNet/IP architecture
• Speed reference method
• Start/stop control
• Feedback requirements
• Fault handling
• Alarm monitoring
• Operator interface

54. Physical Parameter Summary

Because physical dimensions and weight are particularly important for a drive of this size, the information is summarized separately.

Physical Specification	20G11LF1K0AN0NNNNN
Frame	Frame 10
Installation Type	MCC Style
Enclosure	Type 1 / IP20
Cooling	Forced Air
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Shipping Weight (kg)	Configuration-dependent
Complete Assembly Weight (kg)	Configuration-dependent
Service Space	Installation-dependent
Cable Space	Installation-dependent

55. Technical Summary

Category	20G11LF1K0AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	High-Power AC Variable Frequency Drive
Voltage	690 VAC
Phase	3 Phase
Current	1040 A
Light-Duty Rating	1,100 kW
Normal-Duty Rating	1,000 kW
Heavy-Duty Rating	900 kW
Frame	Frame 10
Cooling	Forced Air
Enclosure	Type 1 / IP20
Installation	MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP
Dynamic Braking	None
Input	AC with Precharge
DC Terminals	Included
HIM	Blank / No HIM
Main Applications	Pumps, Fans, Blowers, Conveyors, Crushers, Compressors, Mixers and Large Process Equipment

56. Overall Product Advantages

The 20G11LF1K0AN0NNNNN is intended for applications where a conventional small or medium AC drive cannot provide sufficient power.

Its main strengths include:

• 1040 A current capacity
• 690 VAC three-phase operation
• 1,100 kW Light-Duty capability
• 1,000 kW Normal-Duty capability
• 900 kW Heavy-Duty capability
• Frame 10 construction
• Air-cooled design
• 800 mm deep MCC-style installation
• Embedded EtherNet/IP
• Adjustable motor speed
• Controlled acceleration
• Industrial process integration
• Large motor compatibility
• Centralized monitoring
• Potential energy optimization
• Suitable for demanding industrial applications

57. Final Product Description

The 20G11LF1K0AN0NNNNN is a very-high-power PowerFlex 755 AC variable frequency drive designed for large three-phase industrial motor applications.

Its 690 VAC voltage class and 1040 A current rating place it firmly in the large industrial drive category.

The drive provides approximately 1,100 kW Light-Duty, 1,000 kW Normal-Duty and 900 kW Heavy-Duty capacity, giving engineers flexibility when matching the drive to different industrial load profiles.

Its Frame 10, air-cooled construction and 800 mm deep MCC-style installation are intended for large electrical installations where cabinet space, ventilation and service access must be carefully considered.

The embedded EtherNet/IP capability allows the drive to be integrated into an industrial automation system, making it possible to control motor speed, monitor operating conditions and manage faults from a centralized control architecture.

The drive is particularly appropriate for large pumps, fans, blowers, conveyors, compressors, crushers, mixers, mining equipment and other high-power process machinery.

For a large pump, variable-speed operation can provide better flow and pressure control.

For a large fan, it can provide adjustable airflow.

For a conveyor, controlled acceleration can reduce mechanical shock.

For mining and processing machinery, the high current capacity provides the electrical capacity required by very large motors.

The main advantage of this product is therefore not simply its high power rating.

Its value comes from combining very high motor capacity with adjustable speed, controlled acceleration, industrial communication and centralized automation capability.

For installation planning, the most important physical figure that can be stated confidently for this configuration is the 800 mm depth.

The exact width, height and total weight in kg should be confirmed from the final mechanical configuration before transportation, lifting, cabinet design or floor-loading calculations.

The closest alternatives within the same high-power family include 20G11LF795AN0NNNNN, 20G11LF960AN0NNNNN, 20G11LF1K4AN0NNNNN and 20G11LF1K5AN0NNNNN, while smaller product families such as PowerFlex 525 and PowerFlex 753 can be considered when the motor power requirement is substantially lower.

In practical terms, the 20G11LF1K0AN0NNNNN is best suited to large industrial installations where the motor is measured in hundreds of kilowatts up to approximately the megawatt range and where reliable variable-speed control is an important part of the production process.