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

Allen-Bradley 20G1ALF500JN4NNNNN PowerFlex 755 AC Drive

1. Product Introduction

The Allen-Bradley 20G1ALF500JN4NNNNN is a high-power PowerFlex 755 AC variable-frequency drive designed for large three-phase industrial motor applications.

It is part of the air-cooled PowerFlex 755 drive family and is intended for applications requiring high motor current, adjustable speed, controlled acceleration, controlled deceleration and integration with an industrial automation system.

The drive is rated for 690 VAC, three-phase input with a 500 A current rating.

Its published power ratings are:

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

The unit uses a Frame 8 high-power mechanical configuration and an 800 mm deep MCC-style arrangement.

The drive is air cooled and uses forced airflow to remove heat from the power section during operation.

The configuration includes embedded EtherNet/IP, allowing the drive to be integrated into a networked industrial control system.

The input arrangement is AC input with precharge and no DC terminals. The configuration is also identified as filtered, with the corresponding CM-jumper configuration specified by the JN4 catalog number.

The model is intended for large motor applications such as pumps, fans, blowers, conveyors, compressors, mining equipment, water systems, cement equipment and other high-power industrial machinery.

2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	AC Variable-Frequency Drive
Model	20G1ALF500JN4NNNNN
Drive Type	High-Power Industrial AC Drive
Cooling	Air Cooled / Forced Air
Frame	Frame 8
Input Voltage	690 VAC
Input Phase	3 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
Filter	Filtered
Mechanical Style	MCC Style
Mechanical Depth	800 mm
Enclosure Class	Type 1 / IP20
Intended Application	Large Industrial AC Motor Control

3. Complete Product Parameters

Parameter	Specification
Model	20G1ALF500JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Category	AC Variable-Frequency Drive
Product 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
Input Type	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
Communication	Embedded EtherNet/IP
Mechanical Style	MCC Style
Mechanical Depth	800 mm
Enclosure	Type 1 / IP20
CM Jumper	Configuration-specific JN4 arrangement
Dynamic Braking	Configuration-specific; verify final order code
HIM Configuration	JN4 configuration; verify final supplied interface
Approx. Height*	2453 mm
Approx. Width*	600 mm
Approx. Depth	800 mm
Approx. Weight*	623 kg
Mounting	Floor-standing / MCC-style installation
Cooling Airflow	Forced Air
Typical Motor Class	Large Industrial AC Motors
Typical Applications	Pumps, fans, blowers, conveyors, compressors and process machinery

*The listed height, width and weight are approximate planning values for the Frame 8 MCC-style configuration. They should not replace the final mechanical drawing or shipping documentation for the exact unit.

4. Electrical Rating

The 20G1ALF500JN4NNNNN is a 690 VAC, three-phase, 500 A PowerFlex 755 drive.

This combination places the model in the high-power section of the product family.

The drive is designed for large AC motors where the electrical system requires a high current rating and the process requires adjustable motor speed.

The principal power ratings are:

Duty Class	Rated Power
Light Duty	530 kW
Normal Duty	500 kW
Heavy Duty	400 kW

The appropriate rating depends on the actual application rather than simply the motor nameplate kW.

5. Light-Duty Rating – 530 kW

The 530 kW Light-Duty rating is the highest published power rating for this 500 A configuration.

Light-Duty operation is generally associated with applications where the motor load does not require the highest continuous torque and overload capability.

Typical examples include large centrifugal pumps, fans and blowers.

The actual motor current must still remain within the applicable drive rating.

6. Normal-Duty Rating – 500 kW

The 500 kW Normal-Duty rating provides a general-purpose reference for industrial motor applications.

Potential applications include:

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

Motor current, load torque and operating conditions should be checked before final selection.

7. Heavy-Duty Rating – 400 kW

The 400 kW Heavy-Duty rating is applicable to more demanding motor-load conditions.

Examples can include:

• Heavy conveyors
• Crushers
• Mixers
• Loaded material-handling systems
• High-torque process machinery
• Machinery requiring frequent acceleration
• Machinery with substantial inertia

Heavy-Duty selection should be based on the actual motor current and load profile.

8. 690 VAC Three-Phase Operation

The 690 VAC voltage class is intended for large industrial motor systems.

Higher motor voltage can reduce current for a given motor power compared with a lower-voltage system.

This can affect the overall design of:

• Motor feeders
• Motor cables
• Transformers
• Switchgear
• Busbars
• Protective devices
• MCC systems
• Electrical distribution

The actual plant supply voltage should be confirmed before installation.

9. 500 A Current Rating

The 500 A rating is one of the main characteristics of this model.

A drive at this current level requires proper electrical engineering.

The installation should account for:

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

The 500 A drive rating should not be used by itself to determine the upstream protective-device rating.

10. Frame 8 Configuration

The Frame 8 configuration is intended for high-power industrial applications.

Frame size affects:

• Mechanical dimensions
• Cooling requirements
• Power connections
• Internal power components
• Service access
• Cabinet layout
• Equipment weight
• Transportation
• Installation requirements

The Frame 8 arrangement requires substantially more installation space than smaller PowerFlex 755 configurations.

11. Mechanical Dimensions and Weight

For preliminary engineering and layout work, the following values can be used as approximate planning information.

Mechanical Parameter	Approximate Value
Model	20G1ALF500JN4NNNNN
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
Enclosure	Type 1 / IP20

The 800 mm depth is associated with the specified MCC-style configuration.

The approximate 623 kg weight should be used only for preliminary planning. Actual equipment weight can vary with configuration, packaging and accessories.

Before lifting or transporting the drive, the actual shipping weight and lifting requirements should be confirmed.

12. 800 mm MCC-Style Construction

The drive uses an 800 mm deep MCC-style mechanical arrangement.

This is an important consideration when planning an electrical room or MCC lineup.

The installation should allow for more than the physical cabinet depth.

Additional space may be required for:

• Front access
• Service access
• Cable bending radius
• Incoming cable connections
• Motor cable connections
• Ventilation
• Door movement
• Maintenance
• Lifting
• Adjacent equipment

The final equipment drawing should be used when designing the installation area.

13. Air-Cooled Design

The drive uses a forced-air cooling system.

At a 500 A rating, the drive can generate substantial heat during operation.

The installation therefore needs sufficient airflow.

Important factors include:

• Air inlet temperature
• Air outlet temperature
• Ventilation
• Cooling fan condition
• Dust accumulation
• Airflow obstruction
• Hot-air recirculation
• Cabinet heat buildup
• Room temperature

Insufficient cooling airflow can increase the internal operating temperature of the drive.

14. Type 1 / IP20 Configuration

The specified Frame 8 MCC-style arrangement is associated with a Type 1 / IP20 enclosure class.

This type of equipment is intended for a suitable industrial electrical environment.

It should not be treated as a weatherproof or water-resistant outdoor enclosure.

Protection should be considered where the installation is exposed to:

• Water
• Condensation
• Heavy dust
• Corrosive chemicals
• Salt
• Conductive contamination
• Outdoor weather

A suitable electrical room or additional enclosure may be required depending on the installation environment.

15. AC Input With Precharge

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

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

The absence of DC terminals is important when designing the overall electrical system.

The drive should therefore be selected according to its specified AC input architecture rather than assuming it can be connected as a conventional common-DC-bus unit.

16. Filtered Configuration

The drive is specified as a filtered configuration.

Filtering is useful in installations where conducted electrical noise and electromagnetic compatibility need to be controlled.

The complete installation should still consider:

• Grounding
• Shielding
• Motor cable routing
• Cable length
• Cabinet bonding
• Power/control cable separation
• Communication cable routing
• Motor insulation

Proper installation remains important even when the drive includes filtering.

17. JN4 Configuration

The JN4 portion of the catalog number identifies a particular configuration within the PowerFlex 755 ordering structure.

The JN4 version should not be treated as electrically identical in every accessory detail to JN0 or JN2 versions simply because the basic drive rating is the same.

For purchasing and replacement work, the complete catalog number should be retained:

20G1ALF500JN4NNNNN

The complete ordering code should be checked against the final equipment label and purchase documentation before replacing a unit.

18. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication.

This provides a direct connection between the drive and an industrial automation network.

Typical control information can include:

• Start command
• Stop command
• Speed reference
• Frequency reference
• Reset command
• Operating mode

Typical feedback can include:

• Running status
• Actual speed
• Output current
• Output voltage
• Fault status
• Warning status
• Diagnostic information
• Drive condition

This communication capability is useful in large industrial plants where drives are controlled and monitored from a centralized automation system.

19. Network Control Architecture

A typical system can be arranged as:

Industrial Controller → EtherNet/IP Network → PowerFlex 755 → AC Motor

The controller can send operating commands to the drive.

The drive can return operating and diagnostic information.

This arrangement can reduce the amount of individual hardwired control wiring required for a large motor installation.

20. Main Product Applications

The 20G1ALF500JN4NNNNN can be considered for a wide range of high-power motor applications.

Typical applications include:

• Large water pumps
• Industrial process pumps
• Cooling-water pumps
• Large ventilation fans
• Industrial blowers
• Mining conveyors
• Cement conveyors
• Aggregate handling
• Crushers
• Compressors
• Material-handling systems
• Industrial process machinery
• Steel-processing equipment
• Large cooling systems
• Wastewater equipment

21. Pump Applications

Large pumps are a common 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 systems
• Mining water systems
• Slurry pumping
• Cooling tower circulation

Variable-speed operation allows the motor speed to be adjusted according to process requirements.

The drive can therefore be integrated with pressure, flow or process-control systems.

22. Fan Applications

Large industrial fans can benefit from adjustable motor speed.

Potential applications include:

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

The drive allows fan speed to be adjusted instead of requiring the motor to operate continuously at one fixed speed.

23. Blower Applications

Large blowers can require substantial motor power.

Potential applications include:

• Wastewater aeration
• Process air
• Combustion air
• Pneumatic conveying
• Industrial exhaust
• Furnace systems
• Chemical process air
• Industrial ventilation

The drive provides adjustable speed and controlled acceleration for these applications.

24. Conveyor Applications

Large conveyors are another important application area.

Potential equipment includes:

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

Variable-speed control can help coordinate material flow between different sections of the process.

25. Mining Applications

The 690 V, 500 A rating is suitable for consideration in large mining motor systems.

Potential applications include:

• Belt conveyors
• Crushers
• Pumps
• Ventilation fans
• Blowers
• Material handling
• Processing equipment
• Mine water systems

Mining environments require additional attention to dust, vibration, temperature and equipment access.

26. Cement and Aggregate Applications

Large cement and aggregate plants use many high-power motors.

The drive can be considered for:

• Crushers
• Conveyors
• Large fans
• Blowers
• Pumps
• Feeders
• Material-handling systems
• Process equipment

Adjustable motor speed can be used to match production requirements.

27. Steel and Metal Processing

Large AC motors are commonly used in metal-processing equipment.

Potential applications include:

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

The 690 V voltage class is suitable for many large-motor distribution systems.

28. Water and Wastewater Applications

The drive can be applied to large water and wastewater equipment.

Typical equipment includes:

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

Network communication can be used to monitor drive status and process information from a centralized control system.

29. Compressor Applications

Large compressors can also use high-power variable-frequency drives.

Potential applications include:

• Process compressors
• Industrial air systems
• Gas-related auxiliary systems
• Large refrigeration equipment
• Process-air equipment

The drive can provide controlled acceleration and adjustable motor speed.

Compressor applications should be evaluated according to compressor type, torque curve, pressure requirement and required speed range.

30. Main Product Advantages

30.1 High Current Capacity

The 500 A current rating allows the drive to control large industrial motors.

This provides substantially more current capacity than smaller PowerFlex 755 models.

30.2 High Power Rating

The 530 kW LD, 500 kW ND and 400 kW HD ratings provide different application-duty references.

This allows the same drive platform to be considered for different load characteristics.

30.3 690 VAC Operation

The 690 VAC voltage class is suitable for high-power motor systems.

For a given power level, higher motor voltage can reduce operating current compared with a lower-voltage motor system.

30.4 Embedded EtherNet/IP

The built-in communication capability supports integration into an industrial automation network.

Drive commands and operating information can be exchanged through the network.

30.5 Frame 8 Construction

Frame 8 provides a mechanical platform suitable for high-power drive applications.

The larger construction accommodates the power components and cooling system required for a 500 A drive.

30.6 Forced-Air Cooling

Forced-air cooling provides continuous heat removal from the high-power drive.

This is important when the drive is operating at high current for extended periods.

30.7 Filtered Input Configuration

The filtered configuration supports installations where electrical noise and electromagnetic compatibility need to be considered.

30.8 MCC-Style Construction

The 800 mm deep MCC-style arrangement is suitable for integration into large industrial electrical installations.

It is particularly relevant where several high-power motor feeders are installed together.

30.9 Precharge Input

The AC input with precharge provides a defined input configuration for the high-power drive.

This is important when designing the incoming electrical system.

31. Installation Planning

The 20G1ALF500JN4NNNNN should be treated as heavy industrial electrical equipment.

Installation Item	Recommended Planning Consideration
Model	20G1ALF500JN4NNNNN
Supply Voltage	690 VAC
Supply Phase	3 Phase
Drive Current	500 A
Frame	Frame 8
Height	Approx. 2453 mm
Width	Approx. 600 mm
Depth	Approx. 800 mm
Weight	Approx. 623 kg
Cooling	Forced Air
Enclosure	Type 1 / IP20
Installation Style	MCC / Floor-standing
Floor Loading	Verify before installation
Cable Entry	Provide adequate bending space
Ventilation	Provide sufficient airflow
Maintenance	Provide suitable service clearance
Lifting	Use suitable lifting equipment
Transportation	Confirm route and access
Communication	Plan EtherNet/IP network connection

32. Floor Loading and Transportation

A drive with an approximate equipment weight of 623 kg requires proper floor-loading evaluation.

The installation should consider:

• Concrete floor capacity
• Support structure
• Anchoring
• Equipment base
• Transportation route
• Forklift or lifting equipment
• Door dimensions
• Elevator capacity
• Ramp loading
• Final positioning

The actual packaged shipping weight can be greater than the bare equipment weight, so transportation planning should use the final shipping documentation.

33. Cooling and Ventilation

The drive’s cooling system should have adequate access to clean cooling air.

The following conditions should be avoided:

• Blocked airflow
• Hot-air recirculation
• Excessive dust
• High ambient temperature
• Restricted exhaust
• Dirty cooling passages
• Obstructed fan openings

Regular inspection of the cooling system is important for high-power equipment.

34. Motor Cable Selection

The motor cable should be selected according to the actual motor current and installation conditions.

Important factors include:

• Cable ampacity
• Cable voltage rating
• Cable length
• Installation method
• Ambient temperature
• Cable grouping
• Grounding
• Shielding
• Motor insulation
• Voltage drop

Long motor cables should be evaluated carefully because high-power variable-frequency systems can experience additional electrical effects associated with cable capacitance and reflected voltage.

35. Electrical Protection

The upstream electrical system should be designed specifically for the drive installation.

Important items include:

• Main disconnect
• Short-circuit protection
• Feeder protection
• Transformer capacity
• Cable capacity
• Grounding
• Protective-device coordination
• Emergency isolation
• Motor protection

The final protection system must be selected according to the actual plant electrical system and applicable requirements.

36. Grounding and Bonding

Correct grounding is essential for high-power drive installations.

The system should provide appropriate arrangements for:

• Protective earth
• Motor grounding
• Cabinet bonding
• Power equipment bonding
• Cable shields where required
• Communication infrastructure

Good grounding also supports the overall electromagnetic compatibility of the installation.

37. Environmental Requirements

The Type 1 / IP20 configuration is intended for an appropriate industrial electrical environment.

The installation should be evaluated for:

• Ambient temperature
• Humidity
• Condensation
• Dust
• Chemical vapors
• Salt
• Corrosive materials
• Vibration
• Altitude
• Cooling-air quality

If the environment is unsuitable for IP20 equipment, an appropriate additional enclosure or controlled electrical room may be necessary.

38. Maintenance

Routine maintenance should focus on cooling, electrical connections and operating condition.

Typical inspection activities include:

• Inspect cooling fans
• Inspect ventilation paths
• Remove excessive dust
• Check power connections
• Check grounding
• Inspect cabinet airflow
• Review fault history
• Review warning history
• Check operating temperatures
• Inspect network connections
• Check for unusual noise or vibration
• Inspect surrounding equipment

Maintenance intervals should be based on actual operating conditions.

39. Five Same-Series / Related Models

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

They are presented as technical alternatives and reference models rather than as a ranking.

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	Cooling
20G1ALF330JN4NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	Frame 8	Air Cooled
20G1ALF370JN4NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	Frame 8	Air Cooled
20G1ALF415JN4NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	Frame 8	Air Cooled
20G1ALF460JN4NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	Frame 8	Air Cooled
20G1ALF510JN4NNNNN	690 VAC	510 A	550 HP	500 HP	450 HP	Frame 8	Air Cooled

The 330 A, 370 A, 415 A and 460 A configurations provide progressively lower current ratings, while the 510 A configuration provides a nearby higher-current reference.

40. Same-Series Electrical Comparison

Model	Voltage	Current	LD	ND	HD	Frame	Depth
20G1ALF330JN4NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	Frame 8	800 mm
20G1ALF370JN4NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	Frame 8	800 mm
20G1ALF415JN4NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	Frame 8	800 mm
20G1ALF460JN4NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	Frame 8	800 mm
20G1ALF500JN4NNNNN	690 VAC	500 A	530 kW	500 kW	400 kW	Frame 8	800 mm

These models are useful when sizing a drive according to motor current and required duty class.

41. Same-Series Mechanical Planning Comparison

Model	Frame	Approx. Height	Approx. Width	Approx. Depth	Approx. Weight
20G1ALF330JN4NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF370JN4NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF415JN4NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF460JN4NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF500JN4NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*

*Approximate planning values based on the general Frame 8 MCC-style arrangement. Individual mechanical drawings should be used for final engineering.

42. Five Same-Brand Reference Models

For a broader comparison within the same brand and PowerFlex 755 family, the following 480 VAC models can be used as reference points.

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 for comparison when the motor system uses 480 VAC rather than the 690 VAC supply associated with the 20G1ALF500JN4NNNNN.

43. Same-Brand Reference Model Parameters

Parameter	20G1AND125AN0NNNNN	20G1AND156AN0NNNNN	20G1AND186AN0NNNNN	20G1AND248AN0NNNNN	20G1AND302AN0NNNNN
Voltage	480 VAC	480 VAC	480 VAC	480 VAC	480 VAC
Current	125 A	156 A	186 A	248 A	302 A
ND	100 HP	125 HP	150 HP	200 HP	250 HP
HD	75 HP	100 HP	125 HP	150 HP	200 HP
Frame	Frame 6	Frame 6	Frame 6	Frame 6	Frame 7
Cooling	Air Cooled	Air Cooled	Air Cooled	Air Cooled	Air Cooled
Product Family	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755

44. Mechanical Information for Reference Models

The 480 V reference models use different frame sizes from the 690 V Frame 8 model.

For that reason, their dimensions and weights should not be assumed to be the same.

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

For engineering work, the exact mechanical drawing for each reference model should be used.

45. Comparison With 20G1ALF460JN4NNNNN

The 460 A model is a close electrical comparison.

Parameter	20G1ALF460JN4NNNNN	20G1ALF500JN4NNNNN
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
Input	AC with Precharge	AC with Precharge
DC Terminals	None	None
Filtering	Filtered	Filtered

The 500 A model provides additional current capacity and higher published power ratings.

46. Comparison With 20G1ALF415JN4NNNNN

Parameter	20G1ALF415JN4NNNNN	20G1ALF500JN4NNNNN
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

This comparison is useful when the motor current falls between the 415 A and 500 A ranges.

47. Comparison With 20G1ALF370JN4NNNNN

Parameter	20G1ALF370JN4NNNNN	20G1ALF500JN4NNNNN
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

The 370 A version provides a lower-current alternative within the same general high-power family.

48. Pump System Advantages

For large pump systems, the drive provides adjustable motor speed.

Potential advantages include:

• Adjustable flow
• Adjustable pressure
• Smooth acceleration
• Smooth stopping
• Reduced mechanical shock
• Centralized monitoring
• Network control
• Fault reporting
• Process-speed adjustment

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

49. Fan System Advantages

Large fans often do not require maximum speed continuously.

Variable-speed operation allows the motor to operate according to actual process demand.

Potential advantages include:

• Adjustable airflow
• Controlled starting
• Reduced mechanical stress
• Process control
• Remote monitoring
• Network communication
• Fault diagnostics

50. Conveyor System Advantages

The drive can provide controlled acceleration and adjustable running speed for large conveyors.

This can help coordinate conveyor operation with:

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

The correct acceleration profile should be established from the conveyor mechanical characteristics.

51. Process Equipment Advantages

Large process equipment often requires adjustable motor speed.

The drive can be used to regulate:

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

The drive’s network capability also allows operating information to be incorporated into the plant control system.

52. Maintenance and Diagnostics

The embedded network interface can provide useful operating information for maintenance.

Typical diagnostic information can help identify:

• Drive faults
• Warnings
• Overload conditions
• Abnormal current
• Operating-state changes
• Communication conditions
• Process-related problems

This can reduce the time required to identify the general operating condition of the motor drive.

53. Product Selection Checklist

Selection Item	Requirement
Model	20G1ALF500JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Supply Voltage	690 VAC
Supply Phase	3 Phase
Current	500 A
LD Rating	530 kW
ND Rating	500 kW
HD Rating	400 kW
Frame	Frame 8
Cooling	Forced Air
Input	AC with Precharge
DC Terminals	None
Communication	Embedded EtherNet/IP
Filtering	Filtered
Mechanical Depth	800 mm
Enclosure	Type 1 / IP20
Height	Approx. 2453 mm*
Width	Approx. 600 mm*
Weight	Approx. 623 kg*
Dynamic Braking	Verify complete configuration
HIM	Verify complete JN4 configuration
Motor Current	Confirm before selection
Duty	Confirm LD/ND/HD requirement
Environment	Confirm before installation
Floor Loading	Verify before installation
Cable System	Verify before installation

*Approximate planning values.

54. Product Identification Summary

Item	Specification
Model	20G1ALF500JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	High-Power AC Variable-Frequency Drive
Voltage	690 VAC
Phase	3 Phase
Current	500 A
LD Rating	530 kW
ND Rating	500 kW
HD Rating	400 kW
Frame	Frame 8
Cooling	Air Cooled
Communication	Embedded EtherNet/IP
Input	AC Input with Precharge
DC Terminals	None
Filter	Filtered
Mechanical Style	MCC Style
Depth	800 mm
Enclosure	Type 1 / IP20
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

55. Final Technical Specification Table

Specification	20G1ALF500JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Category	AC Variable-Frequency Drive
Product Type	High-Power Industrial 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	Frame 8
Cooling	Forced Air / Air Cooled
Input Configuration	AC Input with Precharge
DC Terminals	None
Filter	Filtered
Communication	Embedded EtherNet/IP
Mechanical Style	MCC Style
Depth	800 mm
Enclosure	Type 1 / IP20
Approx. Height	2453 mm*
Approx. Width	600 mm*
Approx. Depth	800 mm
Approx. Weight	623 kg*
Typical Motor Application	Large AC Motors
Typical Loads	Pumps, fans, blowers, conveyors, compressors and process machinery
Typical Industries	Mining, cement, aggregate, water, wastewater, manufacturing and process industries
Control	Variable-Speed AC Motor Control
Network	EtherNet/IP
Installation	Industrial electrical room, MCC or suitable cabinet arrangement

*Approximate planning values. Final mechanical dimensions and weight should be confirmed from the exact supplied configuration.

56. Overall Product Description

The Allen-Bradley 20G1ALF500JN4NNNNN is a high-power PowerFlex 755 AC variable-frequency drive designed for large three-phase motor applications.

The combination of 690 VAC input, 500 A current capacity and 530/500/400 kW LD/ND/HD ratings makes this configuration suitable for large industrial motor systems.

The Frame 8 air-cooled construction provides the physical and thermal platform required for a high-power drive of this size.

The 800 mm MCC-style depth should be taken into account when planning electrical rooms, MCC lineups, cable routing, maintenance access and transportation.

The embedded EtherNet/IP interface allows the drive to operate as part of a networked automation system. Commands, operating values, status information and diagnostic information can be exchanged between the drive and the control system.

The drive’s AC input with precharge and no DC terminals defines its basic incoming power arrangement. The filtered configuration and JN4 ordering configuration should also be retained when specifying a replacement or preparing a quotation.

The drive can be used for large pumps, fans, blowers, conveyors, compressors, mining equipment, cement machinery, water systems, wastewater equipment, material-handling systems and other large industrial motor loads.

The approximate mechanical planning values of 2453 mm height, 600 mm width, 800 mm depth and 623 kg weight are useful for preliminary layout and equipment planning. They should not be used as a replacement for the final mechanical drawing when fabricating a cabinet, calculating floor loading, arranging lifting equipment or preparing transportation.

For final selection, the most important checks are motor full-load current, required duty class, supply voltage, load torque, acceleration and deceleration requirements, braking requirements, environmental conditions, cooling, cable installation, upstream protection and available installation space.

The 20G1ALF500JN4NNNNN is therefore a high-power industrial drive configuration intended for large 690 V AC motors where adjustable speed, controlled motor operation and network-based automation are required.