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20G11LF650AN0NNNNN — Detailed Product Introduction, Specifications, Applications and Related Models

1. Product Overview

The 20G11LF650AN0NNNNN is a high-power PowerFlex 755 air-cooled AC packaged drive designed for large three-phase industrial motor applications.

It belongs to the high-capacity section of the PowerFlex 755 product family and is intended for applications where a conventional small or medium-size variable frequency drive would not provide sufficient current capacity.

The drive is designed for a 690 VAC three-phase power system and has a 650 A output-current rating. Its high-current design makes it suitable for large motors used in pumps, fans, blowers, conveyors, compressors, crushers, material-handling systems, mining equipment, water-treatment installations and other heavy industrial machinery.

The catalog configuration identifies an air-cooled packaged drive with an 800 mm deep MCC-style mechanical arrangement, embedded EtherNet/IP communication, AC input with DC terminals, filtering and a Type 1/IP20 enclosure arrangement.

This is a large industrial drive rather than a compact machine-level inverter. Its installation normally requires appropriate electrical distribution equipment, ventilation, grounding, motor cabling, protection and mechanical support.

2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	High-Power AC Packaged Drive
Catalog Number	20G11LF650AN0NNNNN
Cooling Method	Air Cooled
Voltage Class	690 VAC
Phase	Three Phase
Output Current	650 A
Frame	Frame 9
Mechanical Style	800 mm Deep MCC Style
Enclosure	Type 1 / IP20
Communication	Embedded EtherNet/IP
Input Arrangement	AC Input with DC Terminals
Input Filtering	Filtered
Dynamic Braking	None
CM Configuration	Factory Configuration Dependent
HIM	Configuration Dependent
Typical Application Level	Large Industrial Motor Control

3. Main Technical Specifications

Parameter	Specification
Model	20G11LF650AN0NNNNN
Product Series	PowerFlex 755
Drive Type	Variable Frequency AC Drive
Cooling	Air Cooled
Input Voltage	690 VAC
Input Phase	3 Phase
Output Current	650 A
Light-Duty Rating	710 kW
Normal-Duty Rating	630 kW
Heavy-Duty Rating	500 kW
Frame Size	Frame 9
Installation Style	800 mm Deep MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Enclosure	Type 1 / IP20
Cooling	Forced Air
Input	AC Input
DC Terminals	Yes
Input Filter	Filtered
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Motor Type	Three-Phase AC Motor
Typical Duty	Light / Normal / Heavy Duty
Typical Motor Application	Large Industrial Motors

4. Electrical Capacity

The most important specification of the 20G11LF650AN0NNNNN is its 650 A output-current rating.

This current level places the drive in the large industrial motor-control category.

The approximate power ratings are:

Duty	Power Rating
Light Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW

The correct rating must always be selected according to the actual motor nameplate current, load characteristics and required overload performance.

A motor with a nominal power value that appears to fall within the drive rating may still require a larger drive if it has high starting torque, frequent overloads, high inertia or other demanding operating characteristics.

5. 690 VAC Three-Phase Operation

The drive is designed for a 690 VAC three-phase industrial power system.

This voltage class is commonly associated with large industrial motors.

Using a higher motor voltage can be advantageous in high-power applications because it allows large amounts of motor power to be transmitted with lower current than would be required at a substantially lower voltage.

For a 690 VAC installation, the electrical system should be evaluated for:

• Supply voltage
• Supply frequency
• Transformer capacity
• Short-circuit current
• Protective-device coordination
• Grounding arrangement
• Motor voltage
• Motor full-load current
• Cable capacity
• Installation environment
• Drive cooling requirements

6. 650 A Output Rating

The 650 A output rating gives this drive substantial capacity for large industrial motors.

This makes it particularly suitable for equipment such as:

• Large pumps
• Large fans
• Industrial blowers
• Long conveyors
• Mining conveyors
• Crushers
• Large mixers
• Process machinery
• Water-treatment equipment
• Material-handling systems
• Large compressors

The actual motor selection should be based primarily on motor current and application duty rather than simply comparing kilowatt figures.

7. Light-Duty Rating — 710 kW

The approximately 710 kW Light-Duty rating is useful for applications where the load profile is comparatively smooth and the overload requirement is limited.

Typical examples include large centrifugal equipment.

Possible applications include:

• Large centrifugal pumps
• Large cooling fans
• Industrial ventilation
• Large blowers
• Water circulation systems
• Cooling-water systems
• Air-handling systems

These applications generally have smoother torque characteristics than highly loaded crushers or high-inertia mechanical systems.

8. Normal-Duty Rating — 630 kW

The approximately 630 kW Normal-Duty rating provides a useful capacity for general industrial applications with variable loading.

Potential applications include:

• Conveyors
• Process pumps
• Industrial fans
• Blowers
• Material-handling equipment
• General process machinery

Normal-duty operation is appropriate where the application requires more demanding operation than a simple light-duty centrifugal load but does not require the full heavy-duty capability.

9. Heavy-Duty Rating — 500 kW

The approximately 500 kW Heavy-Duty rating is particularly relevant to applications with greater torque requirements or more severe overload conditions.

Examples include:

• Crushers
• Heavy conveyors
• Mining equipment
• Large mixers
• High-inertia machinery
• Bulk material-handling equipment
• Heavy process equipment

When selecting the drive for heavy-duty service, the motor’s actual full-load current, overload profile, acceleration requirements and mechanical load should be evaluated.

10. Cooling System

The 20G11LF650AN0NNNNN uses an air-cooled design.

At this power level, cooling is a major engineering consideration.

Power semiconductor devices, capacitors, reactors and other electrical components generate heat during operation. The cooling system must remove this heat efficiently.

The installation should therefore provide adequate:

• Air intake
• Exhaust airflow
• Cabinet ventilation
• Ambient-temperature control
• Clearance
• Maintenance access

Dust accumulation should also be controlled.

A restricted airflow path can increase operating temperature and may shorten component life.

11. Physical Dimensions

The configuration is associated with an 800 mm deep MCC-style installation.

Mechanical Parameter	Specification
Frame	Frame 9
Installation Style	800 mm Deep MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Enclosure	Type 1 / IP20
Cooling	Forced Air
Mounting	Industrial / MCC Style
Weight (kg)	Configuration-dependent

The 800 mm depth should be considered when designing the cabinet, MCC lineup or equipment room.

The complete width and height should be taken from the mechanical drawing corresponding to the final configuration.

12. Weight

The exact equipment weight should not be guessed from the catalog number alone.

For a large packaged drive, the final physical weight can vary depending on the mechanical configuration, factory options, cabinet arrangement and installed components.

Weight Item	Value
Drive Weight	Configuration-dependent
Packaged Assembly Weight	Configuration-dependent
Weight (kg)	Configuration-dependent
Shipping Weight	Configuration-dependent
Cabinet Weight	Configuration-dependent
Lifting Requirement	Based on Final Assembly
Floor Loading	Must Be Evaluated

For transportation and lifting, the final equipment documentation should be used.

13. Enclosure

The configuration is associated with a Type 1 / IP20 style.

This type of enclosure is intended primarily for indoor industrial electrical environments where the equipment is protected from direct exposure to water and severe environmental contamination.

The installation location should therefore be evaluated carefully.

Where the surrounding environment contains:

• Excessive dust
• Water spray
• Condensation
• Corrosive gases
• Conductive contamination

additional environmental protection may be required.

14. Embedded EtherNet/IP Communication

The PowerFlex 755 platform provides embedded EtherNet/IP communication capability.

This allows the drive to become part of a larger industrial automation network.

Typical data exchanged with the control system can include:

Data	Typical Function
Start Command	Starts the motor
Stop Command	Stops the motor
Speed Reference	Sets desired motor speed
Actual Speed	Reports motor speed
Output Frequency	Reports operating frequency
Output Current	Indicates motor loading
Drive Status	Reports operating condition
Warning	Indicates abnormal operating condition
Fault	Reports drive fault
Fault Reset	Clears applicable faults
Diagnostic Information	Supports maintenance

This communication capability is especially useful in automated factories and process plants where the drive must operate as part of a coordinated control system.

15. AC Input with DC Terminals

The drive configuration includes an AC input arrangement with DC terminals.

This provides additional flexibility for certain power-system architectures.

Possible system concepts can include:

• DC bus arrangements
• Shared DC bus systems
• Multi-drive systems
• Regenerative energy management architectures

The exact DC-bus arrangement must be engineered for the complete installation and should not be assumed solely from the presence of DC terminals.

16. Input Filtering

The configuration includes input filtering.

Filtering is useful for controlling electrical disturbances and high-frequency electrical noise associated with power-electronic switching.

This can be particularly important in facilities containing:

• PLC equipment
• Instrumentation
• Sensors
• Industrial communication systems
• Multiple variable frequency drives
• Sensitive control equipment

Proper grounding, cable routing and shielding remain important even when filtering is installed.

17. Product Introduction

The 20G11LF650AN0NNNNN is designed to control the speed and torque of a large three-phase AC motor.

Instead of connecting a motor directly to a fixed-frequency power supply and allowing it to operate at essentially one normal speed, the variable frequency drive controls the electrical power supplied to the motor.

The drive can vary output frequency and voltage according to the motor-control requirements.

This allows the motor to operate at different speeds according to the needs of the production process.

For example, a pump can operate at reduced speed when lower flow is required.

A fan can slow down when less airflow is needed.

A conveyor can accelerate smoothly instead of applying full mechanical force immediately.

A mixer can operate at different speeds during different stages of production.

A large process machine can coordinate its motor speed with other equipment through the automation system.

18. Basic Operating Principle

The general power-conversion process can be represented as:

690 VAC Three-Phase Supply

↓

AC Input

↓

Input / Precharge Section

↓

Rectification

↓

DC Link

↓

Inverter Section

↓

Variable-Frequency AC Output

↓

Three-Phase Motor

The drive therefore acts as the controlled electrical interface between the industrial power system and the motor.

19. Main Product Advantages

19.1 High Current Capacity

The 650 A rating makes this model suitable for very large industrial motors.

This is one of its biggest advantages over smaller variable frequency drives.

19.2 High Power Capacity

The drive supports approximately:

• 710 kW Light Duty
• 630 kW Normal Duty
• 500 kW Heavy Duty

This gives the same basic drive platform flexibility across different industrial load types.

19.3 690 VAC Capability

The 690 VAC rating makes it suitable for large industrial motor systems.

It is particularly relevant to installations where 690 VAC motors are already part of the plant’s electrical architecture.

19.4 Variable-Speed Control

The drive allows motor speed to be adjusted to match process requirements.

This can improve:

• Process control
• Production flexibility
• Flow regulation
• Pressure regulation
• Airflow control
• Conveyor speed
• Mixing speed

19.5 Controlled Acceleration

Large motors and mechanical systems can experience significant mechanical stress during direct starting.

A variable frequency drive allows acceleration to be controlled.

This can reduce mechanical shock on:

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

19.6 Network Integration

Embedded EtherNet/IP communication allows the drive to exchange information with the automation system.

This is useful for centralized control, monitoring and diagnostics.

19.7 High-Power Industrial Construction

The PowerFlex 755 platform is intended for demanding industrial motor applications.

Its large-frame construction is suitable for applications where high power, network integration and variable-speed operation are required.

20. Pump Applications

Large pumps are among the most suitable applications for this drive.

Typical applications include:

• Water transfer
• Cooling-water circulation
• Industrial process water
• Wastewater
• Mining dewatering
• Irrigation
• Chemical process pumping
• Large circulation systems

The drive can adjust motor speed according to flow or pressure requirements.

This can provide more flexible process control than simply running the pump at full speed and regulating the process using mechanical throttling.

21. Fan and Blower Applications

Large fans and blowers can require substantial motor power.

Potential applications include:

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

Variable-speed control allows airflow to be adjusted according to actual demand.

22. Conveyor Applications

Large conveyors often have considerable inertia.

The drive can provide controlled acceleration and deceleration.

Potential benefits include:

• Reduced belt shock
• Reduced gearbox stress
• Reduced coupling stress
• Smooth starting
• Adjustable conveyor speed
• Better material-flow control
• Improved process coordination

This makes the drive particularly relevant to mining, cement, aggregate and bulk-material-handling applications.

23. Crusher Applications

Crushers can create substantial mechanical loads and may require significant starting torque.

The 500 kW Heavy-Duty rating makes the model potentially suitable for appropriately sized crusher applications where the motor current and overload requirements remain within the drive’s capability.

Crusher applications should be evaluated more carefully than centrifugal pump applications because their load characteristics can be substantially more demanding.

24. Mining Applications

Mining equipment frequently requires high-power motors.

Typical equipment includes:

Mining Equipment	Drive Function
Large Conveyor	Variable-Speed Control
Crusher	Heavy-Duty Motor Control
Dewatering Pump	Flow Control
Ventilation Fan	Airflow Regulation
Material Handling	Controlled Acceleration
Processing Equipment	Motor-Speed Regulation

The 690 VAC / 650 A configuration is particularly relevant to large mining installations where the motor system has been designed around this voltage and current class.

25. Cement and Aggregate Applications

Cement and aggregate facilities contain numerous high-power motors.

Potential applications include:

• Crushers
• Conveyors
• Large fans
• Blowers
• Pumps
• Mixers
• Material-handling systems

The drive’s high current capacity makes it suitable for large equipment when the motor and load requirements match the applicable duty rating.

26. Water and Wastewater Applications

Water-treatment plants often use large pumps operating for long periods.

Typical applications include:

• Raw-water pumping
• Water transfer
• Cooling-water circulation
• Wastewater pumping
• Process-water systems
• Large ventilation equipment

Variable-speed operation can help match pump output to actual process demand.

27. Energy-Saving Potential

Variable-speed control can offer substantial energy-saving potential in certain pump and fan applications.

For example, if a process does not require maximum flow or airflow continuously, the motor may be operated below full speed.

The actual energy saving depends on:

• Load profile
• Equipment characteristics
• Operating hours
• Process demand
• Control method
• System resistance

The drive itself does not guarantee a particular energy-saving percentage. The benefit comes from matching motor speed more closely with the actual process requirement.

28. Motor Compatibility

Before selecting the drive, the motor nameplate should be checked carefully.

Motor Parameter	Importance
Rated Voltage	Critical
Full-Load Current	Critical
Rated Power	Very High
Rated Frequency	High
Rated Speed	High
Power Factor	High
Efficiency	High
Starting Torque	Very High
Overload Requirement	Critical
Speed Range	Very High
Insulation System	High
Cable Length	High
Load Type	Critical

The motor’s full-load current is especially important when selecting a 650 A drive.

29. Installation Considerations

Installation Parameter	Requirement
Supply Voltage	690 VAC
Supply Phase	Three Phase
Motor Voltage	Verify Motor Nameplate
Motor Current	Verify Motor Nameplate
Motor Power	Compare With Duty Rating
Duty Type	Light / Normal / Heavy
Cooling	Adequate Forced-Air Ventilation
Depth	800 mm
Width	Verify Final Configuration
Height	Verify Final Configuration
Weight (kg)	Verify Final Configuration
Grounding	Proper Grounding Required
Motor Cable	Correctly Sized
Control Cable	Properly Routed
Network Cable	Properly Installed
Ambient Temperature	Verify Site Conditions
Dust	Controlled
Maintenance Clearance	Required

30. Maintenance Recommendations

A high-power air-cooled drive should receive regular maintenance.

Cooling Fans

Inspect fans for abnormal noise, contamination and reduced airflow.

Air Passages

Check that cooling openings are not blocked.

Electrical Connections

Inspect power connections according to the applicable maintenance procedure.

Motor Cables

Inspect motor cables, terminals and grounding connections.

Cabinet

Check for dust, moisture and contamination.

Temperature

Monitor unusual temperature increases.

Fault History

Review drive faults and warnings.

Network Communication

Check communication between the drive and the control system.

31. Five Same-Series or Closely Related Models

The following models are useful for comparison with the 20G11LF650AN0NNNNN. The closest alternatives are other high-power 690 VAC PowerFlex 755 configurations.

Model	Series	Voltage	Current	LD Rating	ND Rating	HD Rating	Size / Depth	Weight (kg)
20G11LF590AN0NNNNN	PowerFlex 755	690 VAC	590 A	630 kW	560 kW	450 kW	800 mm	Configuration-dependent
20G11LF650JN0NNNNN	PowerFlex 755	690 VAC	650 A	710 kW	630 kW	500 kW	800 mm	Configuration-dependent
20G11LF650JN4NNNNN	PowerFlex 755	690 VAC	650 A	710 kW	630 kW	500 kW	800 mm	Configuration-dependent
20G11LF710AN0NNNNN	PowerFlex 755	690 VAC	710 A	800 kW	710 kW	560 kW	800 mm class	Configuration-dependent
20G11LF765AN0NNNNN	PowerFlex 755	690 VAC	765 A	850 kW	750 kW	630 kW	800 mm class	Configuration-dependent

The 590 A model is a lower-current alternative, while the 710 A and 765 A models provide progressively greater current capacity.

32. Model Comparison

Parameter	20G11LF590AN0NNNNN	20G11LF650AN0NNNNN	20G11LF650JN0NNNNN	20G11LF710AN0NNNNN	20G11LF765AN0NNNNN
Series	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage	690 VAC	690 VAC	690 VAC	690 VAC	690 VAC
Current	590 A	650 A	650 A	710 A	765 A
LD	630 kW	710 kW	710 kW	800 kW	850 kW
ND	560 kW	630 kW	630 kW	710 kW	750 kW
HD	450 kW	500 kW	500 kW	560 kW	630 kW
Cooling	Air	Air	Air	Air	Air
Installation	MCC Style	MCC Style	MCC Style	MCC Style	MCC Style
Depth	800 mm	800 mm	800 mm	800 mm class	800 mm class
Width	Config.-dependent	Config.-dependent	Config.-dependent	Config.-dependent	Config.-dependent
Height	Config.-dependent	Config.-dependent	Config.-dependent	Config.-dependent	Config.-dependent
Weight (kg)	Config.-dependent	Config.-dependent	Config.-dependent	Config.-dependent	Config.-dependent

33. Difference Between the 590 A and 650 A Versions

The main difference is current capacity.

Characteristic	590 A Version	650 A Version
Output Current	590 A	650 A
Light Duty	630 kW	710 kW
Normal Duty	560 kW	630 kW
Heavy Duty	450 kW	500 kW
Voltage	690 VAC	690 VAC
Product Series	PowerFlex 755	PowerFlex 755
Typical Position	Large Motor	Larger Motor

The 650 A version is therefore useful when the motor’s operating current is too close to the practical limit of the 590 A version.

34. Difference Between the 650 A and 710 A Versions

Characteristic	650 A	710 A
Current	650 A	710 A
LD	710 kW	800 kW
ND	630 kW	710 kW
HD	500 kW	560 kW
Voltage	690 VAC	690 VAC
Series	PowerFlex 755	PowerFlex 755
Cooling	Air	Air
Depth	800 mm class	800 mm class
Weight (kg)	Configuration-dependent	Configuration-dependent

The 710 A version should be considered when the motor current or duty requirements exceed the practical capability of the 650 A version.

35. Five Popular Models Under the Same Brand

The following five models represent other commonly encountered products within the same brand family. They cover substantially different power ranges and should not automatically be treated as direct substitutes for the 650 A drive.

Model	Product Series	Voltage Class	Current Class	Typical Application	Dimensions	Weight (kg)
25B-D010N104	PowerFlex 525	480 VAC class	10 A class	Small Pumps / Fans	Frame-dependent	Configuration-dependent
25B-D017N104	PowerFlex 525	480 VAC class	17 A class	Pumps / Conveyors	Frame-dependent	Configuration-dependent
25B-D027N114	PowerFlex 525	480 VAC class	27 A class	Machinery / Pumps	Frame-dependent	Configuration-dependent
20F11ND077AA0NNNNN	PowerFlex 753	480 VAC class	77 A class	Pumps / Fans / Conveyors	Frame-dependent	Configuration-dependent
20G11LF710AN0NNNNN	PowerFlex 755	690 VAC	710 A	Large Industrial Motors	800 mm class	Configuration-dependent

36. 25B-D010N104

The 25B-D010N104 is a compact variable frequency drive intended for substantially smaller motors.

Parameter	25B-D010N104
Series	PowerFlex 525
Drive Type	Compact AC Drive
Voltage Class	480 VAC class
Current Class	10 A class
Typical Applications	Small Pumps
Typical Applications	Small Fans
Typical Applications	Small Conveyors
Installation	Compact
Dimensions	Frame-dependent
Weight (kg)	Configuration-dependent

This model is useful for smaller machinery but is not a direct electrical replacement for the 650 A drive.

37. 25B-D017N104

The 25B-D017N104 is another compact drive suitable for medium-small motor applications.

Parameter	25B-D017N104
Series	PowerFlex 525
Drive Type	Compact Variable Frequency Drive
Voltage Class	480 VAC class
Current Class	17 A class
Typical Applications	Pumps
Typical Applications	Fans
Typical Applications	Conveyors
Typical Applications	General Machinery
Dimensions	Frame-dependent
Weight (kg)	Configuration-dependent

38. 25B-D027N114

The 25B-D027N114 provides greater current capability within the compact-drive family.

Parameter	25B-D027N114
Series	PowerFlex 525
Drive Type	Compact AC Drive
Voltage Class	480 VAC class
Current Class	27 A class
Typical Applications	Pumps
Typical Applications	Fans
Typical Applications	Conveyors
Typical Applications	Process Machinery
Dimensions	Frame-dependent
Weight (kg)	Configuration-dependent

39. 20F11ND077AA0NNNNN

The 20F11ND077AA0NNNNN belongs to the PowerFlex 753 family and is designed for a much smaller motor range than the 650 A PowerFlex 755.

Parameter	20F11ND077AA0NNNNN
Series	PowerFlex 753
Drive Type	Industrial AC Drive
Voltage Class	480 VAC class
Current Class	77 A class
Typical Applications	Pumps
Typical Applications	Fans
Typical Applications	Conveyors
Typical Applications	Process Machinery
Cooling	Configuration-dependent
Dimensions	Frame-dependent
Weight (kg)	Configuration-dependent

40. 20G11LF710AN0NNNNN

The 20G11LF710AN0NNNNN is one of the closest higher-current alternatives.

Parameter	20G11LF710AN0NNNNN
Series	PowerFlex 755
Drive Type	High-Power AC Drive
Voltage	690 VAC
Output Current	710 A
Light-Duty Rating	800 kW
Normal-Duty Rating	710 kW
Heavy-Duty Rating	560 kW
Cooling	Air Cooled
Input	AC Input
DC Terminals	Yes
Installation	800 mm Deep MCC Style
Depth	800 mm class
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Communication	Embedded EtherNet/IP

41. Application Suitability

Application	Suitability
Large Centrifugal Pump	Excellent
Large Water Pump	Excellent
Cooling-Water Pump	Excellent
Large Industrial Fan	Excellent
Large Blower	Excellent
Large Conveyor	Very Good
Mining Conveyor	Very Good
Crusher	Suitable Within Heavy-Duty Rating
Large Mixer	Suitable Within Heavy-Duty Rating
Industrial Compressor	Application Dependent
Cement Equipment	Very Good
Aggregate Equipment	Very Good
Mining Equipment	Very Good
Material Handling	Very Good
Process Machinery	Excellent
Water Treatment	Excellent

42. Advantages in Large Pump Systems

For large pumps, the drive provides adjustable motor speed rather than requiring continuous full-speed operation.

When process demand decreases, the motor can be operated at a lower speed.

This can provide:

• Better flow control
• Better pressure control
• Smooth motor starting
• Reduced mechanical shock
• Improved process flexibility
• Potential energy savings
• Reduced reliance on mechanical throttling

43. Advantages in Fan Systems

Large fans can consume considerable power when operating continuously at high speed.

The drive can adjust fan speed to match the required airflow.

Potential benefits include:

• Adjustable airflow
• Smooth acceleration
• Reduced mechanical stress
• Better ventilation control
• Better process response
• Potential reduction in energy consumption

44. Advantages in Conveyor Systems

For large conveyors, controlled acceleration is particularly useful.

Instead of applying full motor torque immediately, the drive can increase motor speed in a controlled manner.

Potential advantages include:

• Reduced belt shock
• Reduced gearbox stress
• Reduced coupling stress
• Improved material handling
• Adjustable conveyor speed
• Better synchronization with upstream and downstream machinery

45. Advantages in Mining

Mining systems often require high-power motor control.

The 650 A drive is suitable for large equipment when the voltage, current and duty requirements match.

Potential applications include:

• Ore conveyors
• Dewatering pumps
• Ventilation fans
• Crushers
• Processing machinery
• Bulk material systems

46. Advantages in Industrial Automation

The embedded EtherNet/IP capability allows the drive to communicate with the plant control system.

A control system can send commands such as:

• Start
• Stop
• Speed reference
• Direction
• Reset

The drive can return information such as:

• Actual speed
• Current
• Frequency
• Status
• Warning
• Fault

This makes the drive suitable for coordinated automated production lines and process systems.

47. Selection Checklist

Before purchasing or installing the 20G11LF650AN0NNNNN, the following points should be checked.

Selection Item	Check
Motor Voltage	Must Match Application
Motor Current	Must Be Within Applicable Drive Rating
Motor Power	Compare With Duty Rating
Load Type	Pump / Fan / Conveyor / Crusher / Other
Duty	Light / Normal / Heavy
Starting Torque	Check Carefully
Overload	Check Carefully
Acceleration Time	Determine From Application
Deceleration Time	Determine From Application
Braking Requirement	Evaluate
Supply Voltage	690 VAC
Supply Frequency	Verify
Ambient Temperature	Verify
Cooling	Adequate Airflow Required
Cabinet Depth	800 mm
Cabinet Width	Verify
Cabinet Height	Verify
Weight (kg)	Verify Final Assembly
Motor Cable	Correctly Sized
Grounding	Required
Network	EtherNet/IP Architecture
Maintenance Access	Required

48. Overall Technical Summary

Category	20G11LF650AN0NNNNN
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	High-Power AC Packaged Drive
Voltage	690 VAC
Phase	3 Phase
Output Current	650 A
Light Duty	710 kW
Normal Duty	630 kW
Heavy Duty	500 kW
Cooling	Air Cooled
Frame	Frame 9
Installation	800 mm Deep MCC Style
Depth	800 mm
Width	Configuration-dependent
Height	Configuration-dependent
Weight (kg)	Configuration-dependent
Enclosure	Type 1 / IP20
Input	AC Input with DC Terminals
Filtering	Filtered
Dynamic Braking	None
Communication	Embedded EtherNet/IP
Typical Motor	Large Three-Phase AC Motor
Pump Suitability	Excellent
Fan Suitability	Excellent
Conveyor Suitability	Very Good
Mining Suitability	Very Good
Cement Suitability	Very Good
Water-System Suitability	Excellent
Process-Machinery Suitability	Excellent

49. Final Product Assessment

The 20G11LF650AN0NNNNN is a high-capacity industrial variable frequency drive designed for large three-phase motor applications.

Its 690 VAC voltage class and 650 A current rating make it suitable for large motor systems where high power and reliable variable-speed control are required.

The approximate duty ratings of 710 kW Light Duty, 630 kW Normal Duty and 500 kW Heavy Duty allow the drive to be matched to different load characteristics.

The product is particularly suitable for large pumps, fans, blowers, conveyors, mining equipment, cement and aggregate machinery, water-treatment systems and other large process machines.

Its air-cooled construction makes correct ventilation and thermal management important.

The 800 mm depth is also a significant mechanical consideration, particularly when the drive is being installed inside an MCC lineup or large electrical cabinet.

The embedded EtherNet/IP capability makes it suitable for integration into an industrial automation system, allowing operating commands, speed references, status information, warnings and fault information to be exchanged with the control system.

For a direct comparison, the 20G11LF590AN0NNNNN provides a lower 590 A capacity, while the 20G11LF710AN0NNNNN and 20G11LF765AN0NNNNN provide progressively greater current capacity.

The most important point during final selection is not simply the motor’s kilowatt rating. The motor full-load current, starting torque, overload requirements, load characteristics, acceleration and deceleration requirements, operating environment and required braking performance should all be considered.

For a large industrial installation, the final mechanical dimensions and Weight (kg) should be confirmed from the exact configured equipment documentation rather than estimated. This is particularly important for transportation, lifting, cabinet design and floor-loading calculations.

Overall, the 20G11LF650AN0NNNNN can be regarded as a high-power, 690 VAC, 650 A PowerFlex 755 AC packaged drive intended for demanding large-motor applications where variable-speed control, high power capacity and industrial network integration are required.