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Allen-Bradley 20G1ALF500JN2NNNNN PowerFlex 755 AC Drive

1. Product Introduction

The Allen-Bradley 20G1ALF500JN2NNNNN is a high-power PowerFlex 755 AC variable-frequency drive designed for large industrial motor-control applications.

This model belongs to the high-power air-cooled section of the PowerFlex 755 family and is intended for applications where a large three-phase AC motor needs controlled acceleration, adjustable speed, controlled stopping, process regulation and integration with an industrial automation system.

The drive is configured for 690 VAC, three-phase operation and has a 500 A current rating. Its published power ratings are 530 kW Light Duty, 500 kW Normal Duty and 400 kW Heavy Duty.

The physical configuration is based on Frame 8 construction with an 800 mm deep MCC-style arrangement. The drive uses forced-air cooling and is intended for installation in an appropriate industrial electrical environment.

The model includes embedded EtherNet/IP, which allows the drive to communicate with an industrial control system for commands, status information, operating values, fault information and diagnostics.

The specified configuration uses AC input with precharge and no DC terminals. It is also identified as a filtered configuration with the CM jumper installed. Dynamic braking is specified as none.

2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	AC Variable-Frequency Drive
Product Configuration	PowerFlex 755 AC Packaged / Air-Cooled Drive
Model	20G1ALF500JN2NNNNN
Cooling Method	Forced Air / Air Cooled
Frame	Frame 8
Input Voltage	690 VAC
Input Phase	Three Phase
Rated Current	500 A
LD Rating	530 kW
ND Rating	500 kW
HD Rating	400 kW
Communication	Embedded EtherNet/IP
Input Configuration	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Mechanical Depth	800 mm
Enclosure Class	Type 1 / IP20 class configuration
Typical Installation	Industrial electrical room, MCC or suitable cabinet arrangement

3. Complete Product Parameters

Parameter	Specification
Model	20G1ALF500JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Category	AC Variable-Frequency Drive
Drive Type	High-Power AC Drive
Input Voltage	690 VAC
Input Phase	3 Phase
Rated Current	500 A
Light-Duty Rating	530 kW
Normal-Duty Rating	500 kW
Heavy-Duty Rating	400 kW
Frame Size	Frame 8
Cooling	Air Cooled / Forced Air
Communication	Embedded EtherNet/IP
Input Type	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Configuration	CM Jumper Installed
Dynamic Braking	None
HIM Configuration	Blank / No HIM configuration
Mechanical Style	MCC Style
Depth	800 mm
Enclosure	Type 1 / IP20 class configuration
Approx. Height*	2453 mm
Approx. Width*	600 mm
Approx. Depth	800 mm
Approx. Weight*	623 kg
Typical Motor Application	Large industrial AC motors
Typical Load Types	Pumps, fans, blowers, conveyors, compressors and process machinery
Installation Environment	Suitable industrial electrical environment
Control Architecture	Local, hardwired or network-based industrial control
Main Communication Function	Drive control, monitoring and diagnostics

*The height, width and weight shown above are approximate planning values for the Frame 8 MCC-style configuration. The exact mechanical drawing and shipment documentation for the supplied catalog number should be used for final cabinet fabrication, lifting, transportation, floor-loading and installation calculations. The 800 mm depth is associated with the specified product configuration.

4. Electrical Characteristics

The 20G1ALF500JN2NNNNN is designed for a 690 VAC three-phase electrical system.

Its 500 A current rating places it in the high-power range of the PowerFlex 755 product family.

The combination of 690 VAC and 500 A allows the drive to control large motors used in industrial equipment where a smaller drive would not provide sufficient current capacity.

The three principal power ratings are:

Duty	Rating
Light Duty	530 kW
Normal Duty	500 kW
Heavy Duty	400 kW

These ratings should not be treated as interchangeable motor-selection values. The appropriate rating depends on the actual load profile, motor current, torque requirements, acceleration requirements and operating cycle.

5. Light Duty Rating – 530 kW

The 530 kW Light Duty rating is the highest published power rating for this configuration.

Light Duty applications generally involve a lower torque requirement compared with applications requiring heavy overload performance.

Typical examples can include large centrifugal pumps, fans and blowers where the mechanical load follows a variable-torque characteristic.

For these applications, the 530 kW rating can provide a suitable operating range when the motor and process requirements are within the drive’s applicable duty limits.

6. Normal Duty Rating – 500 kW

The 500 kW Normal Duty rating provides a general industrial operating reference for the drive.

This rating can be considered for applications such as:

• Industrial pumps
• Large fans
• Conveyors
• Process machinery
• Blowers
• Material-handling equipment
• Industrial auxiliary systems

The final selection should be based on the motor nameplate current and the actual process load rather than motor kW alone.

7. Heavy Duty Rating – 400 kW

The 400 kW Heavy Duty rating is intended for more demanding load conditions.

Heavy-duty applications can involve:

• High starting torque
• Frequent acceleration
• Frequent deceleration
• High continuous torque
• Rapid load changes
• Heavy material handling
• Crushers
• Loaded conveyors
• Mixers
• Process equipment

A motor with a nameplate rating above 400 kW should not automatically be operated at the Heavy Duty rating. The complete motor and load requirements must be checked before selection.

8. 690 VAC Voltage Class

The 690 VAC rating makes this drive suitable for high-power motor systems commonly used in large industrial installations.

For large motors, higher operating voltage can reduce the current required for a given power level compared with lower-voltage motor systems.

This can influence the design of:

• Incoming feeders
• Motor cables
• Switchgear
• Transformers
• Busbars
• Motor control centers
• Protective devices
• Cable routing
• Electrical distribution systems

The actual plant supply voltage should always be verified before connecting the drive.

9. 500 A Current Capacity

The 500 A current rating is a major characteristic of the 20G1ALF500JN2NNNNN.

A drive of this size requires appropriate electrical infrastructure.

The installation should be evaluated for:

• Incoming cable capacity
• Protective device coordination
• Short-circuit current
• Grounding
• Motor cable sizing
• Busbar capacity
• Transformer capacity
• Thermal dissipation
• Cable termination
• Cabinet ventilation
• Maintenance access

The 500 A value should not be used by itself to determine the upstream protective-device rating. Protection must be selected according to the complete electrical installation and applicable requirements.

10. Frame 8 Construction

The drive uses a Frame 8 configuration.

Frame size determines more than the physical size of the equipment. It also relates to the internal power structure, cooling system, terminal arrangement, cabinet requirements and service access.

A Frame 8 drive requires significantly more mechanical planning than a small wall-mounted variable-frequency drive.

The approximate planning arrangement is:

Mechanical Item	Planning Value
Model	20G1ALF500JN2NNNNN
Frame	Frame 8
Height	Approx. 2453 mm
Width	Approx. 600 mm
Depth	Approx. 800 mm
Weight	Approx. 623 kg
Mechanical Style	MCC Style
Cooling	Forced Air
Installation	Floor-standing / industrial cabinet arrangement

The listed height, width and weight should be treated as preliminary engineering values. Final dimensions should be checked against the applicable mechanical drawing.

11. 800 mm MCC-Style Depth

The specified product configuration uses an 800 mm deep MCC-style arrangement.

This dimension should be considered when planning:

• Electrical room layout
• MCC line-up
• Cabinet depth
• Cable bending radius
• Incoming power connections
• Motor cable routing
• Front access
• Service access
• Ventilation
• Transportation
• Equipment lifting

An 800 mm equipment depth does not mean that the installation only needs 800 mm of total floor space. Additional working and maintenance clearances may be required.

12. Approximate Dimensions and Weight

For preliminary engineering and quotation work, the following mechanical values can be used as planning figures:

Parameter	Approximate Value
Model	20G1ALF500JN2NNNNN
Height	2453 mm
Width	600 mm
Depth	800 mm
Weight	623 kg
Installation Style	MCC Style
Frame	Frame 8
Cooling	Forced Air

The 623 kg figure should be regarded as an approximate planning weight rather than a certified shipping weight for every possible packaged arrangement.

This distinction is important for transportation, lifting, floor loading and installation engineering.

Before moving the equipment into a plant, the actual shipping weight and lifting requirements should be confirmed from the final equipment documentation.

13. Air-Cooled Design

The 20G1ALF500JN2NNNNN uses an air-cooled power section.

A high-power drive produces significant heat during operation, so cooling must be considered as part of the electrical installation.

The surrounding installation should provide sufficient airflow to prevent excessive heat accumulation.

Important factors include:

• Air inlet conditions
• Air outlet conditions
• Cabinet ventilation
• Room temperature
• Dust accumulation
• Fan condition
• Airflow restriction
• Heat from adjacent equipment
• Recirculation of hot air

Poor airflow can cause elevated operating temperatures and reduce the available thermal operating margin.

14. Type 1 / IP20 Installation

The specified configuration is intended for installation in an appropriate industrial electrical environment rather than direct exposure to weather or water.

The Type 1 / IP20 class arrangement should be protected from:

• Direct water
• Heavy condensation
• Excessive dust
• Corrosive chemicals
• Outdoor weather
• Conductive contamination

Where the installation environment is harsh, the drive may require a suitable enclosure, electrical room or environmental-control arrangement.

15. AC Input with Precharge

The model uses AC input with precharge and no DC terminals.

The precharge arrangement is part of the drive’s input power architecture and manages the initial charging of the internal DC bus.

The lack of DC terminals is also an important configuration characteristic.

For this reason, the drive should not automatically be treated as a general common-DC-bus drive without checking the exact system design and product configuration.

16. Filtered Configuration

The 20G1ALF500JN2NNNNN is identified as a filtered configuration.

Filtering can help with the electrical noise characteristics of the drive installation.

However, the overall installation still needs proper attention to:

• Grounding
• Shielding
• Cable routing
• Motor cable length
• Cabinet bonding
• Control wiring
• Communication wiring
• Separation between power and signal cables

A filtered drive does not eliminate the need for good installation practices.

17. CM Jumper Installed

The product specification identifies the configuration as CM Jumper Installed.

The common-mode configuration should be considered when connecting the drive to the plant electrical system.

Grounding, supply-system configuration and electromagnetic compatibility requirements should be reviewed before commissioning.

18. Dynamic Braking

The specified model has no dynamic braking.

This configuration can be appropriate for applications where rapid regenerative braking is not a primary requirement.

For high-inertia machinery, the braking requirement should be calculated separately.

Examples of applications requiring additional braking analysis include:

• High-inertia fans
• Large conveyors
• Centrifuges
• Hoisting machinery
• Large rotating equipment
• Machinery with frequent stops

If the load must decelerate rapidly, the required braking energy and stopping time should be evaluated before final drive selection.

19. Embedded EtherNet/IP

The PowerFlex 755 configuration provides embedded EtherNet/IP communication.

This allows the drive to be incorporated into an industrial Ethernet control system.

Typical data exchanged with the controller can include:

Controller to Drive	Drive to Controller
Start command	Running status
Stop command	Actual speed
Speed reference	Output current
Frequency reference	Output voltage
Reset command	Fault status
Operating command	Warning status
Control mode	Diagnostic information

This arrangement can reduce the amount of conventional hardwired control required for a large industrial motor system.

20. Industrial Automation Integration

A typical control structure can be represented as:

Controller → Industrial Ethernet Network → PowerFlex 755 Drive → Motor

The drive can receive operating commands from the control system and return real-time operating information.

For large plants, this can make centralized monitoring easier.

Operators can monitor drive status from a control system rather than relying entirely on local drive operation.

21. Product Applications

The 20G1ALF500JN2NNNNN is intended for large industrial motor applications.

Typical applications include:

1. Large water pumps
2. Industrial process pumps
3. Cooling-water pumps
4. Large ventilation fans
5. Industrial blowers
6. Mining conveyors
7. Cement conveyors
8. Aggregate handling
9. Large compressors
10. Material-handling systems
11. Industrial process machinery
12. Steel-processing equipment
13. Large cooling systems
14. Wastewater pumping
15. Industrial production lines

22. Pump Applications

Large pump systems are a natural application for high-power variable-frequency drives.

Possible applications include:

• Water transmission
• Industrial water circulation
• Cooling-water systems
• Wastewater pumping
• Raw-water pumping
• Irrigation
• Process water
• Mining water systems
• Slurry pumping
• Cooling tower circulation

Variable-speed control can allow the pump to operate at a speed that matches the actual process demand.

This can provide smoother control than continuously operating a fixed-speed motor against a throttled valve.

23. Fan Applications

Large industrial fans can also use variable-frequency control.

Potential applications include:

• Industrial ventilation
• Furnace ventilation
• Mine ventilation
• Dust extraction
• Cooling systems
• Combustion air
• Exhaust systems
• Process ventilation
• Tunnel ventilation
• Large air-handling equipment

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

24. Blower Applications

Large blowers can require substantial motor power, particularly in industrial processing and wastewater systems.

Typical applications include:

• Aeration
• Process air
• Combustion air
• Pneumatic conveying
• Industrial exhaust
• Furnace systems
• Wastewater treatment

The drive can regulate motor speed and provide controlled acceleration.

25. Conveyor Applications

Large conveyors often require high motor power and controlled acceleration.

The 20G1ALF500JN2NNNNN can be considered for:

• Mining conveyors
• Ore conveyors
• Cement conveyors
• Aggregate conveyors
• Port material handling
• Bulk material systems
• Production conveyors
• Long-distance belt conveyors

Variable-speed control can help coordinate material flow between different sections of a production or material-handling system.

26. Mining Applications

The high-power rating is suitable for large motor systems used in mining operations.

Possible applications include:

• Belt conveyors
• Crushers
• Pumps
• Mine ventilation
• Blowers
• Material handling
• Processing equipment
• Water systems

Mining installations require additional attention to dust, vibration, temperature, cable length and environmental protection.

27. Cement and Aggregate Applications

Cement and aggregate plants contain many large motor loads.

The drive can be considered for:

• Crushers
• Conveyors
• Fans
• Blowers
• Pumps
• Feeders
• Material-handling equipment
• Process machinery

Controlled motor speed can be useful where process conditions vary during production.

28. Steel and Metal Processing

Large steel and metal-processing plants also use high-power AC motors.

Potential applications include:

• Cooling pumps
• Process fans
• Blowers
• Conveyors
• Material-handling systems
• Process lines
• Auxiliary equipment
• Water circulation

The 690 V architecture is suitable for many large-motor electrical systems where the plant distribution system is designed around this voltage class.

29. Water and Wastewater Applications

The drive can be used for large water and wastewater motor systems.

Potential equipment includes:

• Main pumps
• Lift pumps
• Transfer pumps
• Aeration blowers
• Circulation pumps
• Sludge-handling equipment
• Process-water systems

Network communication can also provide centralized monitoring of motor current, operating speed, alarms and faults.

30. Compressor Applications

Large compressors may also require high-power variable-speed motor control.

Potential advantages include:

• Controlled acceleration
• Adjustable speed
• Process control
• Reduced mechanical shock
• Centralized monitoring
• Network communication
• Drive diagnostics

Compressor applications should be evaluated according to compressor type, pressure requirements, torque curve, operating speed range and acceleration requirements.

31. Main Product Advantages

31.1 High Current Capacity

The 500 A rating gives the drive a large operating range for high-power AC motors.

This makes the model suitable for applications that require considerably more current than medium-size industrial drives.

31.2 High Power Rating

The published ratings of 530 kW LD, 500 kW ND and 400 kW HD provide multiple duty references within one drive platform.

This allows the application engineer to select the appropriate rating based on the actual load profile.

31.3 690 VAC Operation

The 690 VAC voltage class is well suited to large motor installations.

For a given power level, higher voltage can reduce motor current compared with lower-voltage systems, which can influence cable and electrical distribution requirements.

31.4 Embedded EtherNet/IP

The embedded communication capability simplifies integration into a networked automation system.

Drive information can be transferred to and from the control system without relying entirely on individual hardwired signals.

31.5 Frame 8 High-Power Construction

Frame 8 provides a mechanical and thermal platform appropriate for high-power applications.

The larger frame also provides space for the power components and cooling arrangement required at this current level.

31.6 Forced-Air Cooling

Forced-air cooling provides a practical method for removing heat from a high-power drive.

Proper airflow remains essential for reliable operation.

31.7 Filtered Configuration

The filtered configuration can support installations where electromagnetic compatibility and conducted-noise considerations are important.

31.8 Precharge Architecture

The AC input with precharge provides a defined high-power input arrangement and manages initial DC-bus charging within the drive system.

31.9 No Dynamic Braking

For applications that do not require regenerative or rapid dynamic braking, the no-braking configuration provides a simpler drive arrangement.

31.10 Network-Based Operation

The blank/no-HIM arrangement can be suitable for applications where the drive is primarily controlled from a centralized automation system.

This is particularly useful in large plants where the drive is part of a larger process-control architecture.

32. Installation Requirements

A drive of this size should be planned as a complete electrical and mechanical system.

Installation Parameter	Consideration
Model	20G1ALF500JN2NNNNN
Supply	690 VAC, 3 Phase
Drive Current	500 A
Frame	Frame 8
Depth	800 mm
Height	Approx. 2453 mm planning value
Width	Approx. 600 mm planning value
Weight	Approx. 623 kg planning value
Cooling	Forced Air
Enclosure	Type 1 / IP20
Ventilation	Required
Floor Loading	Must support drive and mounting structure
Cable Routing	Must accommodate large cable bending radius
Grounding	Proper protective grounding required
Communication	EtherNet/IP network planning
Maintenance	Suitable service access required
Transportation	Equipment route must accommodate size and weight
Lifting	Suitable lifting equipment required

33. Cabinet Planning

The approximately 623 kg planning weight means the installation should be treated as heavy electrical equipment.

The floor and support structure should be checked before installation.

Important considerations include:

• Floor loading
• Anchoring
• Equipment alignment
• Cable entry
• Cable bending radius
• Ventilation
• Front clearance
• Service clearance
• Door movement
• Adjacent equipment
• Transportation path
• Lifting method

34. Electrical Room Planning

The drive should have sufficient surrounding space for safe operation and maintenance.

The electrical room should provide:

• Suitable ambient temperature
• Suitable humidity
• Adequate ventilation
• Low contamination
• Appropriate access
• Suitable grounding
• Adequate cable routing
• Adequate maintenance space
• Safe isolation arrangements
• Sufficient room for lifting and replacement

35. Motor Cable Considerations

Large 690 V motor installations require proper cable selection.

The cable system should consider:

• Motor full-load current
• Installation method
• Ambient temperature
• Cable grouping
• Cable length
• Voltage rating
• Grounding
• Shielding
• Electromagnetic compatibility
• Motor insulation
• Voltage drop

Long motor cables may require additional analysis because cable capacitance and reflected-wave effects can become more significant in high-power drive systems.

36. Grounding and Bonding

Correct grounding is essential for a high-power variable-frequency drive.

The installation should provide appropriate:

• Protective earth
• Cabinet bonding
• Motor grounding
• Cable shielding where required
• Communication grounding
• Equipment bonding

The exact grounding arrangement should follow the drive installation requirements and the plant electrical system.

37. Maintenance

Maintenance should focus on cooling, electrical connections and operating condition.

Typical maintenance activities include:

• Inspect cooling fans
• Check ventilation paths
• Remove excessive dust
• Inspect power connections
• Inspect grounding connections
• Check cabinet ventilation
• Review fault history
• Review warning history
• Check abnormal temperatures
• Inspect communication connections
• Check surrounding electrical equipment
• Follow safe isolation procedures

Maintenance intervals should be adjusted to the actual environment and operating hours.

38. Environmental Considerations

The Type 1 / IP20 configuration should be installed in a controlled industrial environment.

Particular attention should be given to:

• Dust
• Moisture
• Condensation
• Chemical vapors
• Salt contamination
• Ambient temperature
• Altitude
• Vibration
• Air quality
• Cooling-air cleanliness

Harsh environments may require an additional enclosure or environmental-control system.

39. Five Same-Series / Related Models

The following models are useful comparison models within the PowerFlex 755 high-power family.

They are listed as technical reference models rather than as a ranking.

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	Cooling
20G1ALF330JN2NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	Frame 8	Air Cooled
20G1ALF370JN2NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	Frame 8	Air Cooled
20G1ALF415JN2NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	Frame 8	Air Cooled
20G1ALF460JN2NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	Frame 8	Air Cooled
20G1ALF500JN0NNNNN	690 VAC	500 A	530 kW	500 kW	400 kW	Frame 8	Air Cooled

These models provide a useful current progression around the 500 A configuration. The 460 A and 500 A versions are particularly close in electrical rating, while the 330 A and 370 A versions provide lower-current alternatives within the same general high-power family. The published catalog family also lists JN0, JN2 and JN4 configurations for several of these ratings.

40. Same-Series Model Parameter Comparison

Model	Voltage	Current	LD	ND	HD	Frame	Depth Class
20G1ALF330JN2NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	Frame 8	800 mm
20G1ALF370JN2NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	Frame 8	800 mm
20G1ALF415JN2NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	Frame 8	800 mm
20G1ALF460JN2NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	Frame 8	800 mm
20G1ALF500JN0NNNNN	690 VAC	500 A	530 kW	500 kW	400 kW	Frame 8	800 mm

For the same Frame 8 mechanical family, preliminary planning can use approximately the same physical envelope, but individual catalog-number drawings should be checked before fabrication.

41. Approximate Mechanical Comparison

Model	Frame	Approx. Height	Approx. Width	Approx. Depth	Approx. Weight
20G1ALF330JN2NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF370JN2NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF415JN2NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF460JN2NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF500JN0NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*

*Planning estimate based on the common Frame 8 MCC-style mechanical arrangement. It should not be treated as the certified shipping weight of each individual catalog number.

42. Five Same-Brand Reference Models

For a broader comparison, the following five PowerFlex 755 models provide reference points at 480 VAC.

Model	Voltage	Current	ND Rating	HD Rating	Frame	Cooling
20G1AND125AN0NNNNN	480 VAC	125 A	100 HP	75 HP	Frame 6	Air Cooled
20G1AND156AN0NNNNN	480 VAC	156 A	125 HP	100 HP	Frame 6	Air Cooled
20G1AND186AN0NNNNN	480 VAC	186 A	150 HP	125 HP	Frame 6	Air Cooled
20G1AND248AN0NNNNN	480 VAC	248 A	200 HP	150 HP	Frame 6	Air Cooled
20G1AND302AN0NNNNN	480 VAC	302 A	250 HP	200 HP	Frame 7	Air Cooled

These models are useful when comparing the 690 V / 500 A configuration against lower-voltage PowerFlex 755 installations.

43. Same-Brand Reference Model Mechanical Information

Because these 480 V reference models use different frame sizes, their dimensions and weights should not be copied from the Frame 8 690 V configuration.

Model	Frame	Voltage	Approx. Height	Approx. Width	Approx. Depth	Weight
20G1AND125AN0NNNNN	Frame 6	480 VAC	Model-specific	Model-specific	Model-specific	Model-specific
20G1AND156AN0NNNNN	Frame 6	480 VAC	Model-specific	Model-specific	Model-specific	Model-specific
20G1AND186AN0NNNNN	Frame 6	480 VAC	Model-specific	Model-specific	Model-specific	Model-specific
20G1AND248AN0NNNNN	Frame 6	480 VAC	Model-specific	Model-specific	Model-specific	Model-specific
20G1AND302AN0NNNNN	Frame 7	480 VAC	Model-specific	Model-specific	Model-specific	Model-specific

For these reference products, the exact mechanical drawing should be used if dimensions or weight are required for engineering.

44. Comparison With 20G1ALF460JN2NNNNN

The 460 A model is a close electrical reference for the 500 A model.

Parameter	20G1ALF460JN2NNNNN	20G1ALF500JN2NNNNN
Voltage	690 VAC	690 VAC
Current	460 A	500 A
LD Rating	500 kW	530 kW
ND Rating	450 kW	500 kW
HD Rating	375 kW	400 kW
Frame	Frame 8	Frame 8
Cooling	Air Cooled	Air Cooled
Depth	800 mm	800 mm
Communication	Embedded EtherNet/IP	Embedded EtherNet/IP
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed
Input	AC with Precharge	AC with Precharge
DC Terminals	None	None

The main electrical difference is the current capacity and the corresponding LD, ND and HD power ratings.

45. Comparison With 20G1ALF415JN2NNNNN

Parameter	20G1ALF415JN2NNNNN	20G1ALF500JN2NNNNN
Voltage	690 VAC	690 VAC
Current	415 A	500 A
LD Rating	450 kW	530 kW
ND Rating	400 kW	500 kW
HD Rating	355 kW	400 kW
Frame	Frame 8	Frame 8
Cooling	Air Cooled	Air Cooled
Depth	800 mm	800 mm
Communication	Embedded EtherNet/IP	Embedded EtherNet/IP
Input	AC with Precharge	AC with Precharge
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed

The 500 A model provides additional current and power capacity compared with the 415 A version.

46. Comparison With 20G1ALF370JN2NNNNN

Parameter	20G1ALF370JN2NNNNN	20G1ALF500JN2NNNNN
Voltage	690 VAC	690 VAC
Current	370 A	500 A
LD Rating	400 kW	530 kW
ND Rating	355 kW	500 kW
HD Rating	300 kW	400 kW
Frame	Frame 8	Frame 8
Cooling	Air Cooled	Air Cooled
Depth	800 mm	800 mm
Communication	Embedded EtherNet/IP	Embedded EtherNet/IP

This comparison is useful when a project is being sized between medium-high and very-high motor power levels.

47. Pump System Advantages

For large pump systems, the drive provides adjustable motor speed rather than requiring the motor to operate continuously at one fixed speed.

Potential advantages include:

• Flow control
• Pressure control
• Smooth starting
• Smooth stopping
• Reduced mechanical shock
• Network monitoring
• Fault reporting
• Adjustable operating speed
• Centralized process control

The actual energy performance depends on the pump curve and operating conditions.

48. Fan System Advantages

For large fans, variable-speed control allows airflow to follow process demand.

Potential advantages include:

• Adjustable airflow
• Smooth acceleration
• Reduced mechanical stress
• Centralized control
• Network monitoring
• Operating-speed adjustment
• Fault diagnostics

This can be useful in ventilation systems where full airflow is not required at all times.

49. Conveyor System Advantages

Conveyor systems can benefit from controlled acceleration and adjustable running speed.

The drive can be incorporated into a system where conveyor speed is coordinated with:

• Feeders
• Crushers
• Screens
• Processing equipment
• Loading systems
• Unloading systems
• Production machinery

The actual acceleration profile should be calculated from the conveyor load, belt length, inertia and mechanical system requirements.

50. Industrial Process Advantages

In process machinery, adjustable motor speed can provide direct control over production conditions.

Potential uses include:

• Pump flow
• Fan airflow
• Conveyor speed
• Process pressure
• Material throughput
• Cooling capacity
• Air volume
• Production rate

The drive can also provide operating information to the plant control system through the embedded communication interface.

51. Network Communication Advantages

The embedded EtherNet/IP interface is particularly useful in larger installations.

A centralized control system can monitor:

• Drive status
• Motor speed
• Output current
• Faults
• Warnings
• Operating condition
• Process commands
• Drive diagnostics

This can reduce the need for separate hardwired meters and individual control circuits.

52. Maintenance Advantages

The networked drive architecture can also simplify maintenance work.

Maintenance personnel can use drive status and diagnostic information to determine whether a problem is related to:

• Motor overload
• Drive fault
• Communication problem
• Operating command
• Speed reference
• Thermal condition
• Power condition
• Process condition

Actual troubleshooting procedures should follow the applicable maintenance and safety instructions for the installation.

53. Product Selection Checklist

Before purchasing or installing the 20G1ALF500JN2NNNNN, the following points should be confirmed.

Selection Item	Required Check
Model	20G1ALF500JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Supply Voltage	690 VAC
Supply Phase	3 Phase
Motor Current	Confirm against 500 A drive rating
Motor Power	Confirm against LD/ND/HD duty
Duty Type	LD, ND or HD
Motor Type	Confirm compatible AC motor
Acceleration	Check motor and load inertia
Deceleration	Check braking requirement
Dynamic Braking	None in this configuration
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM configuration
Environment	Confirm temperature and contamination level
Cooling	Confirm airflow
Enclosure	Type 1 / IP20 installation environment
Dimensions	Confirm final mechanical drawing
Weight	Confirm final equipment documentation
Floor Loading	Verify support capacity
Cable	Verify cable size and installation method
Grounding	Verify plant grounding arrangement
Protection	Verify upstream protection
Maintenance	Provide appropriate service access

54. Product Identification Summary

Item	Specification
Model	20G1ALF500JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	AC Variable-Frequency Drive
Voltage	690 VAC
Phase	3 Phase
Current	500 A
LD	530 kW
ND	500 kW
HD	400 kW
Frame	Frame 8
Cooling	Air Cooled
Communication	Embedded EtherNet/IP
Input	AC with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Mechanical Style	MCC Style
Depth	800 mm
Approx. Height	2453 mm*
Approx. Width	600 mm*
Approx. Weight	623 kg*
Typical Applications	Pumps, fans, blowers, conveyors, compressors, mining, cement, water and process equipment

*Approximate planning values.

55. Final Technical Specification Table

Specification	20G1ALF500JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	High-Power AC Variable-Frequency Drive
Input Voltage	690 VAC
Input Phase	3 Phase
Rated Current	500 A
Light-Duty Rating	530 kW
Normal-Duty Rating	500 kW
Heavy-Duty Rating	400 kW
Frame	Frame 8
Cooling	Forced Air / Air Cooled
Communication	Embedded EtherNet/IP
Input Type	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Mechanical Configuration	MCC Style
Depth	800 mm
Enclosure	Type 1 / IP20 class configuration
Approx. Height	2453 mm*
Approx. Width	600 mm*
Approx. Depth	800 mm
Approx. Weight	623 kg*
Typical Motor Application	Large AC motors
Typical Industries	Mining, water, cement, aggregate, steel, manufacturing and process industries
Typical Loads	Pumps, fans, blowers, conveyors, compressors and process machinery
Control	Variable-Speed AC Motor Control
Network Integration	Industrial Ethernet / EtherNet/IP

*Approximate planning values. The final mechanical drawing and product documentation should be used for exact dimensions and weight.

56. Overall Product Description

The Allen-Bradley 20G1ALF500JN2NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor applications.

The drive combines a 690 VAC three-phase input, 500 A current capacity, and published ratings of 530 kW LD, 500 kW ND and 400 kW HD.

Its Frame 8 air-cooled construction and 800 mm MCC-style depth make it suitable for large industrial electrical installations where considerable power, cooling and mechanical space are required.

The integrated EtherNet/IP communication provides a practical connection to a centralized automation system. Drive operating information, commands, status information and diagnostics can be exchanged through the industrial network.

The specific JN2 configuration is identified with filtered input configuration, CM jumper installed, AC input with precharge, no DC terminals and no dynamic braking.

The drive can be applied to large pumps, fans, blowers, conveyors, compressors, mining equipment, cement and aggregate machinery, water systems, material-handling equipment and other high-power industrial processes.

From an engineering perspective, the most important selection points are the motor full-load current, required duty class, motor voltage, load torque, acceleration requirements, deceleration requirements, braking needs, environmental conditions, cooling requirements, cable arrangement, upstream protection and available installation space.

The approximate 2453 mm height, 600 mm width, 800 mm depth and 623 kg weight are useful for preliminary planning of a Frame 8 MCC-style installation, but the final mechanical drawing should be used for actual fabrication, shipping, lifting, floor-loading and installation work.

The 20G1ALF500JN2NNNNN is therefore best understood as a large industrial variable-frequency drive configuration for high-power 690 V AC motor control, with network communication and a mechanical design intended for substantial industrial installations.