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

Allen-Bradley 20G1ALF500JN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1ALF500JN0NNNNN is a high-power PowerFlex 755 AC variable-frequency drive designed for demanding industrial motor-control applications.

This model is rated for 690 VAC, three-phase input and provides a rated current of 500 A. Its published power ratings are 530 kW for Light Duty (LD), 500 kW for Normal Duty (ND), and 400 kW for Heavy Duty (HD).

The drive uses a Frame 8 mechanical configuration and an air-cooled power section. The specified enclosure arrangement is Type 1 / IP20, 800 mm deep MCC-style construction.

The model includes embedded EtherNet/IP, making it suitable for integration into industrial control networks where drive status, commands, diagnostics, speed references, and operating parameters need to be exchanged with a controller or supervisory system.

The input configuration is AC input with precharge and no DC terminals. The drive is supplied with filtering, and the CM jumper is installed, which distinguishes the JN0 configuration from comparable configurations using different common-mode jumper arrangements.

The drive has no dynamic braking option specified in this catalog configuration, and it is supplied with a blank configuration with no HIM.

2. Brand and Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	AC Variable-Frequency Drive
Drive Class	High-Power Industrial AC Drive
Model	20G1ALF500JN0NNNNN
Cooling	Forced Air / Air Cooled
Frame	Frame 8
Input Voltage	690 VAC
Input Phase	3 Phase
Rated Current	500 A
Communication	Embedded EtherNet/IP
Enclosure	Type 1 / IP20
Mechanical Depth	800 mm MCC Style
Dynamic Braking	None
HIM	Blank / No HIM
CM Jumper	Installed
Input Configuration	AC Input with Precharge
DC Terminals	None
Filter	Filtered

The model number 20G1ALF500JN0NNNNN belongs to the PowerFlex 755 air-cooled AC drive family. The JN0 configuration is identified with the CM jumper installed, while the basic electrical rating remains 500 A at 690 VAC.

3. Main Technical Parameters

Parameter	Specification
Model	20G1ALF500JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	AC Variable-Frequency Drive
Input Voltage	690 VAC
Input Frequency	50/60 Hz class
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	Forced Air
Enclosure Style	Type 1 / IP20
Mechanical Depth	800 mm
MCC Style	Yes
Input Configuration	AC Input with Precharge
DC Terminals	No
Input Filter	Filtered
CM Jumper	Installed
Dynamic Braking	None
Human Interface Module	Blank / No HIM
Communication	Embedded EtherNet/IP
Installation Type	Industrial cabinet / MCC-style installation
Approx. Height*	2453 mm
Approx. Width*	600 mm
Approx. Depth*	800 mm
Approx. Weight*	623 kg
Cooling Arrangement	Forced-air power-section cooling
Intended Motor Class	Large industrial AC motors
Typical Application Range	Pumps, fans, conveyors, compressors, process machinery and heavy industrial equipment

*The 2453 mm × 600 mm × 800 mm dimensions and approximately 623 kg weight should be treated as planning values for the Frame 8 MCC-style configuration, rather than as a substitute for the final mechanical drawing for the exact shipment. The 800 mm depth is directly associated with the specified MCC-style configuration; final cabinet, lifting, floor-loading and installation work should use the applicable mechanical drawing for the supplied unit.

4. Electrical Rating

The most important electrical characteristic of the 20G1ALF500JN0NNNNN is its 500 A, 690 VAC, three-phase rating.

This rating places the drive in the high-power end of the PowerFlex 755 range. The unit is intended for large motors and industrial loads where the drive must handle substantial continuous current and significant mechanical power.

The three published duty ratings are:

Duty Class	Power Rating	Typical Operating Concept
Light Duty (LD)	530 kW	Loads with relatively lower continuous torque demand
Normal Duty (ND)	500 kW	General industrial constant or variable torque applications
Heavy Duty (HD)	400 kW	Higher torque demand and more demanding operating conditions

The difference between these ratings is important when selecting the drive for a motor. The same drive does not necessarily provide the same allowable motor power under every duty class.

5. Understanding LD, ND and HD Ratings

Light Duty – 530 kW

Light Duty is normally associated with applications where the motor does not require the highest continuous overload capability.

Typical examples include large centrifugal fans and some pump applications where the torque requirement follows a variable-torque characteristic.

For these applications, the 530 kW LD rating provides the highest published power rating of this particular configuration.

Normal Duty – 500 kW

Normal Duty is intended for general industrial motor operation.

It can be appropriate for equipment such as conveyors, pumps, fans, compressors and other machinery where the required motor torque is within the normal operating envelope of the drive.

Heavy Duty – 400 kW

Heavy Duty provides a lower kW rating but is intended for applications where the drive is required to handle more demanding torque conditions.

Examples can include heavily loaded conveyors, crushers, mixers, process equipment and machinery with frequent acceleration or higher starting torque requirements.

Motor selection should always be based on actual motor current, torque requirements, acceleration requirements and the applicable duty rating rather than simply matching motor horsepower or kW.

6. 690 VAC Input System

The 20G1ALF500JN0NNNNN is a 690 VAC, three-phase drive.

A 690 V-class drive is commonly used in large industrial installations because the higher voltage allows large amounts of motor power to be transmitted at lower current than would be required at a lower voltage.

For large motors, this can affect:

• Motor cable sizing
• Switchgear selection
• Transformer sizing
• Short-circuit protection
• Busbar design
• MCC arrangement
• Cable voltage drop
• Motor insulation requirements
• Installation clearances
• Heat dissipation
• Overall cabinet design

The 690 VAC rating should be considered together with the actual plant supply voltage. A 690 VAC drive should not be selected simply because the motor nameplate shows a similar voltage; the complete supply and motor system must be checked.

7. 500 A Current Rating

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

A 500 A industrial drive requires considerably more attention to installation engineering than a smaller drive.

The electrical installation should account for:

• Incoming feeder capacity
• Protective devices
• Busbar rating
• Cable ampacity
• Grounding
• Short-circuit current
• Thermal dissipation
• Motor cable routing
• Cabinet ventilation
• Maintenance access
• Power-terminal torque
• Isolation procedures

The 500 A rating also makes this drive suitable for large motors used in heavy industrial equipment.

8. Frame 8 Construction

The model uses a Frame 8 configuration.

Frame size is important because it affects much more than the physical enclosure.

It also relates to:

• Power semiconductor arrangement
• Cooling requirements
• Power-terminal configuration
• Cabinet dimensions
• Internal airflow
• Service access
• Lifting requirements
• Shipping weight
• Installation space
• Maintenance access

For a Frame 8 drive, cabinet and room planning should be completed before equipment delivery.

The approximate planning dimensions for this configuration are:

Mechanical Parameter	Approximate Value
Model	20G1ALF500JN0NNNNN
Height	2453 mm
Width	600 mm
Depth	800 mm
Approximate Weight	623 kg
Mechanical Style	MCC-style
Enclosure	Type 1 / IP20
Cooling	Forced Air

These values are intended for preliminary planning. The final mechanical drawing should be used for fabrication, lifting, transportation, floor loading and maintenance-clearance calculations.

9. Air-Cooled / Forced-Air Design

The 20G1ALF500JN0NNNNN uses a forced-air cooling arrangement.

A high-power 500 A drive generates substantial heat during operation. The cooling system therefore becomes part of the overall installation design rather than being treated as a minor accessory.

The installation room or cabinet must provide suitable airflow.

Important considerations include:

• Adequate intake airflow
• Adequate exhaust airflow
• Avoidance of recirculation
• Filter maintenance where applicable
• Ambient temperature
• Cabinet heat accumulation
• Separation from major heat sources
• Accessibility of cooling components
• Regular inspection of ventilation paths

Blocked or restricted airflow can raise internal temperatures and reduce the available operating margin.

10. Type 1 / IP20 Enclosure

The specified configuration uses Type 1 / IP20 protection.

This means the drive should normally be installed in an appropriate industrial electrical environment rather than exposed directly to water, dust, corrosive chemicals or outdoor conditions.

The IP20 rating should not be interpreted as a weatherproof enclosure.

For harsh environments, the drive may need to be installed inside a suitable enclosure or electrical room with appropriate environmental protection.

11. 800 mm MCC-Style Depth

The specified configuration has an 800 mm deep MCC-style mechanical arrangement.

This dimension is especially important during cabinet planning.

The 800 mm depth should be considered together with:

• Front service clearance
• Rear clearance requirements
• Cable bending radius
• Incoming cable routing
• Outgoing motor cable routing
• Door swing
• Maintenance access
• Cooling airflow
• Adjacent equipment
• Lifting and transportation routes

A cabinet should not be designed using depth alone. The complete mechanical drawing and installation instructions should be considered.

12. AC Input with Precharge

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

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

The absence of user-accessible DC terminals is also an important configuration detail.

This means the model should not be treated as a general-purpose common-DC-bus unit without checking the exact product configuration and system architecture.

13. Filtered Configuration

The 20G1ALF500JN0NNNNN is specified as a filtered configuration.

Filtering can be important in industrial installations where conducted electrical noise and electromagnetic compatibility need to be considered.

The actual system design should still consider:

• Motor cable length
• Cable shielding
• Grounding
• Cabinet bonding
• Cable separation
• Control wiring
• Communication wiring
• Motor insulation
• Installation topology

A drive filter does not eliminate the need for proper installation practices.

14. CM Jumper Installed

The JN0 configuration specifies that the CM jumper is installed.

This is a meaningful difference when comparing the JN0 model with other suffix configurations.

The common-mode grounding/filter arrangement affects how the drive interacts electrically with the supply system and should be selected according to the installation requirements.

The exact grounding and common-mode configuration should therefore be checked before connecting the drive to the plant power system.

15. Dynamic Braking

The 20G1ALF500JN0NNNNN is specified with no dynamic braking.

This is suitable for applications where the motor does not require a dedicated dynamic braking arrangement for rapid deceleration or regeneration control.

For loads with high inertia or frequent stopping, the application should be evaluated separately.

Examples include:

• Large conveyors
• Centrifuges
• Hoists
• High-inertia fans
• Large rotating machinery
• Material-handling equipment

If rapid deceleration is required, the braking requirements should be calculated before final drive selection.

16. Human Interface Module

The specified model is supplied as Blank / No HIM.

This means the drive configuration does not include a standard local Human Interface Module as part of this catalog configuration.

For an installation where operators need local control or local parameter access, the control architecture should provide another suitable method, such as network-based access, engineering tools or an appropriate interface option.

The absence of a HIM can also be useful when the drive is intended to be controlled primarily from a centralized automation system.

17. Embedded EtherNet/IP

One of the major features of the model is its embedded EtherNet/IP communication capability.

This allows the drive to participate directly in an industrial Ethernet control architecture.

Typical functions include:

• Start and stop commands
• Speed reference
• Frequency reference
• Current monitoring
• Voltage monitoring
• Drive status
• Fault information
• Warning information
• Operating data
• Diagnostic information
• Parameter access
• Production data
• Remote control

For large industrial systems, network integration can significantly reduce the amount of conventional hardwired control required.

18. Industrial Network Integration

The drive can be incorporated into an automation network in which the motor drive is treated as an intelligent field device.

A typical architecture can contain:

Controller → Industrial Ethernet Network → PowerFlex 755 → Motor

The controller can issue commands while the drive provides operating information and diagnostic feedback.

This arrangement is useful for plants where centralized monitoring is important.

19. Main Product Applications

The 20G1ALF500JN0NNNNN is suitable for large industrial AC motor applications.

Typical applications include:

1. Large water pumps
2. Industrial process pumps
3. Cooling-water systems
4. Large ventilation fans
5. Industrial blowers
6. Conveyors
7. Mining equipment
8. Cement and aggregate machinery
9. Material-handling systems
10. Large compressors
11. Process machinery
12. Steel and metal-processing equipment
13. Industrial production lines
14. Large rotating machinery
15. Utility and infrastructure equipment

20. Pump Applications

Large pumps are one of the practical application areas for a 690 V, 500 A drive.

Typical pump systems include:

• Water transmission
• Industrial cooling water
• Process water
• Raw-water pumping
• Wastewater systems
• Irrigation
• Mining slurry systems
• Chemical process pumping
• Cooling tower circulation
• Boiler-related auxiliary systems

Variable-speed operation allows the pump speed to be adjusted to match the required flow or process condition.

This can reduce throttling losses and improve process control.

21. Fan and Blower Applications

Large fans and blowers are often suitable for variable-frequency control.

Applications can include:

• Furnace ventilation
• Dust collection
• Mine ventilation
• Industrial exhaust
• HVAC process systems
• Cooling systems
• Combustion air
• Process ventilation
• Tunnel ventilation
• Industrial air handling

Fan applications can benefit from variable-speed control because the required airflow often changes throughout the operating cycle.

22. Conveyor Applications

The drive can also be used with large conveyor systems.

Possible applications include:

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

Variable-speed control allows the conveyor speed to be coordinated with upstream and downstream equipment.

Network communication can also provide useful information such as drive status, current, speed and fault condition.

23. Mining Applications

The high-power rating makes this type of drive suitable for large mining equipment where large AC motors are used.

Possible applications include:

• Belt conveyors
• Crushers
• Fans
• Pumps
• Ventilation equipment
• Material handling
• Process machinery
• Ore handling systems

Mining installations require careful consideration of environmental conditions, dust, temperature, vibration, motor cable length and maintenance requirements.

24. Cement and Aggregate Applications

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

Potential applications include:

• Crushers
• Conveyors
• Fans
• Blowers
• Pumps
• Material feeders
• Process equipment
• Grinding-related auxiliary equipment

The variable-speed drive can be used to control motor speed according to production requirements.

25. Steel and Metal Processing

Large industrial motors are common in steel and metal-processing plants.

Potential drive applications include:

• Cooling systems
• Pumps
• Fans
• Blowers
• Conveyors
• Process lines
• Material handling
• Auxiliary machinery

The 690 V architecture is particularly relevant to large motor systems where reducing current at a given power level is beneficial to the electrical distribution design.

26. Water and Wastewater

The drive can be considered for large water and wastewater motor applications.

Typical equipment includes:

• Main pumps
• Lift pumps
• Transfer pumps
• Aeration blowers
• Cooling pumps
• Sludge handling equipment
• Water circulation systems

Variable-speed control can be used to match pumping capacity with actual demand.

27. Compressor Applications

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

Potential benefits include:

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

Compressor selection should consider the actual torque curve, starting requirements, operating pressure and required speed range.

28. Main Product Advantages

28.1 High Power Capacity

The 500 A rating and 530/500/400 kW LD/ND/HD ratings make the drive suitable for large industrial motors.

This allows a single drive system to control substantial motor loads without using multiple smaller drives in parallel.

28.2 690 VAC Architecture

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

For a given power level, a higher motor voltage generally allows lower current than a lower-voltage equivalent system, which can influence cable, switchgear and distribution design.

28.3 Embedded EtherNet/IP

Built-in industrial Ethernet communication simplifies integration with automation systems.

Drive operating information can be exchanged with the control system without relying entirely on traditional hardwired signals.

28.4 Frame 8 High-Power Construction

The Frame 8 design provides a mechanical platform for high-power applications.

Its larger physical size is directly related to the power level, cooling requirements and installation architecture.

28.5 Forced-Air Cooling

Forced-air cooling is appropriate for a high-power drive where substantial heat must be removed continuously.

Proper airflow management is essential for maintaining reliable operation.

28.6 Precharge Input Configuration

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

This is especially important in large electrical systems where the DC bus charging process must be controlled.

28.7 Filtered Configuration

The integrated filtering arrangement helps support electromagnetic compatibility considerations within a properly engineered installation.

28.8 No Dynamic Braking

The absence of dynamic braking keeps the specified configuration focused on applications that do not require a dedicated braking package.

Where braking is necessary, the application should be reviewed before ordering.

28.9 No HIM

The blank/no-HIM configuration is suitable for systems where operation and monitoring are primarily handled through the plant automation system.

This can be particularly practical in centralized control rooms.

29. Installation Considerations

A drive of this size requires careful installation planning.

The following items should be checked before installation:

Installation Item	Requirement / Consideration
Model	20G1ALF500JN0NNNNN
Supply Voltage	690 VAC, 3 phase
Drive Current	500 A
Frame	Frame 8
Depth	Approximately 800 mm
Height	Approximately 2453 mm planning value
Width	Approximately 600 mm planning value
Weight	Approximately 623 kg planning value
Cooling	Forced air
Enclosure	Type 1 / IP20
Mounting	Suitable industrial/MCC installation
Floor Loading	Must support approximately 623 kg plus enclosure/support structure
Cable Entry	Must allow large power cable bending radius
Ventilation	Adequate intake and exhaust airflow
Maintenance	Front and required service access must be maintained
Grounding	Proper protective grounding required
Communication	EtherNet/IP network planning required
Lifting	Mechanical lifting arrangement required
Transportation	Route must accommodate size and weight

The dimensions and weight should be confirmed against the final supplied configuration before equipment transportation or cabinet fabrication.

30. Motor Cable Considerations

Large 690 V drives require careful motor-cable engineering.

The motor cable should be selected according to:

• Rated motor current
• Cable installation method
• Ambient temperature
• Cable grouping
• Cable length
• Voltage rating
• Grounding requirements
• EMC requirements
• Motor insulation system
• Applicable electrical codes

Long motor cables can create additional electrical stresses and may require additional system evaluation.

The motor manufacturer and drive installation requirements should therefore be considered together.

31. Cabinet and Electrical Room Planning

Because the approximate equipment weight is around 623 kg and the mechanical depth is approximately 800 mm, this is not a small panel-mounted device.

The installation area should provide:

• Adequate floor strength
• Equipment anchoring
• Sufficient working space
• Cable access
• Ventilation
• Service access
• Safe isolation space
• Suitable lifting access
• Adequate door and aisle clearance

The transportation route should also be checked before delivery.

32. Recommended Same-Series / Related Models

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

They are not presented as a ranking. They provide different current and power levels for applications that may otherwise be considered for the 500 A model.

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame	Cooling	Configuration
20G1ALF265JN0NNNNN	690 VAC	265 A	315 kW	250 kW	200 kW	Frame 8	Air Cooled	PowerFlex 755
20G1ALF330JN0NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	Frame 8	Air Cooled	PowerFlex 755
20G1ALF370JN0NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	Frame 8	Air Cooled	PowerFlex 755
20G1ALF415JN0NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	Frame 8	Air Cooled	PowerFlex 755
20G1ALF460JN0NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	Frame 8	Air Cooled	PowerFlex 755

The 415 A and 460 A versions are especially close to the 500 A model in electrical rating and can be useful when comparing motor current requirements. The 500 A model provides the higher current rating within this group. The listed 690 V PowerFlex 755 models share the same general high-power air-cooled family architecture.

33. Mechanical Comparison of Same-Series Models

Because the five comparison models are within the same high-power Frame 8 family, preliminary mechanical planning can be approached from the same general installation concept.

Model	Frame	Approx. Height	Approx. Width	Approx. Depth	Approx. Weight
20G1ALF265JN0NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF330JN0NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF370JN0NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF415JN0NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*
20G1ALF460JN0NNNNN	Frame 8	Approx. 2453 mm	Approx. 600 mm	Approx. 800 mm	Approx. 623 kg*

*These are planning estimates based on the common Frame 8 MCC-style arrangement, not individual certified shipping weights for each catalog number. Exact dimensions and weights should be checked against the mechanical drawing for the specific model.

34. Five Same-Brand Reference Models

For a broader comparison within the Allen-Bradley drive range, the following five models represent lower-voltage PowerFlex 755 configurations.

They are useful when the motor system is based on 480 VAC rather than 690 VAC.

Model	Voltage	Current	ND Rating	HD Rating	Frame	Cooling	Typical Comparison
20G1AND125AN0NNNNN	480 VAC	125 A	100 HP	75 HP	Frame 6	Air Cooled	Medium-large motor systems
20G1AND156AN0NNNNN	480 VAC	156 A	125 HP	100 HP	Frame 6	Air Cooled	Medium-large motor systems
20G1AND186AN0NNNNN	480 VAC	186 A	150 HP	125 HP	Frame 6	Air Cooled	Large motor systems
20G1AND248AN0NNNNN	480 VAC	248 A	200 HP	150 HP	Frame 6	Air Cooled	Higher-power 480 V systems
20G1AND302AN0NNNNN	480 VAC	302 A	250 HP	200 HP	Frame 7	Air Cooled	Large 480 V motor systems

These models are reference points for comparing the 690 V, 500 A configuration against lower-voltage PowerFlex 755 products.

35. Mechanical Comparison With 480 V Reference Models

The 480 V reference models use different frame configurations, so their physical installation requirements should not be assumed to be identical to the Frame 8 690 V model.

Model	Frame	Voltage	Approx. Installation Class	Approx. Dimensions	Approx. Weight
20G1AND125AN0NNNNN	Frame 6	480 VAC	Large industrial drive	Model-specific	Model-specific
20G1AND156AN0NNNNN	Frame 6	480 VAC	Large industrial drive	Model-specific	Model-specific
20G1AND186AN0NNNNN	Frame 6	480 VAC	Large industrial drive	Model-specific	Model-specific
20G1AND248AN0NNNNN	Frame 6	480 VAC	Large industrial drive	Model-specific	Model-specific
20G1AND302AN0NNNNN	Frame 7	480 VAC	Large industrial drive	Model-specific	Model-specific

For these comparison models, exact dimensions and weights should be obtained from the mechanical drawing of each individual catalog number rather than estimated from the 690 V Frame 8 construction.

36. 20G1ALF500JN0NNNNN vs. 20G1ALF460JN0NNNNN

The 460 A model is one of the closest electrical comparisons.

Parameter	20G1ALF460JN0NNNNN	20G1ALF500JN0NNNNN
Voltage	690 VAC	690 VAC
Current	460 A	500 A
LD	500 kW	530 kW
ND	450 kW	500 kW
HD	375 kW	400 kW
Frame	Frame 8	Frame 8
Cooling	Air Cooled	Air Cooled
Depth	800 mm class	800 mm class
Communication	Embedded EtherNet/IP	Embedded EtherNet/IP
CM Jumper	Configuration dependent	Installed
Dynamic Braking	Configuration dependent	None

The main selection difference is the available current and associated motor power capability.

37. 20G1ALF500JN0NNNNN vs. 20G1ALF415JN0NNNNN

Parameter	20G1ALF415JN0NNNNN	20G1ALF500JN0NNNNN
Voltage	690 VAC	690 VAC
Current	415 A	500 A
LD	450 kW	530 kW
ND	400 kW	500 kW
HD	355 kW	400 kW
Frame	Frame 8	Frame 8
Cooling	Air Cooled	Air Cooled
Mechanical Style	MCC Style	MCC Style
Depth	800 mm class	800 mm class
Communication	Embedded EtherNet/IP	Embedded EtherNet/IP

The 500 A model provides additional current capacity and higher published LD/ND/HD power ratings.

38. Advantages for Pump Systems

For large pumps, the 20G1ALF500JN0NNNNN provides a combination of high current capacity and variable-speed control.

Important operating benefits can include:

• Adjustable pump speed
• Controlled acceleration
• Controlled deceleration
• Flow adjustment
• Pressure control
• Reduced mechanical shock
• Centralized monitoring
• Network-based control
• Drive diagnostics

The exact energy savings depend on the pump curve, operating point, process requirements and control strategy.

39. Advantages for Fan Systems

Fan applications can benefit from variable-speed operation because airflow requirements often change.

The drive can allow the motor to operate at a speed appropriate for the process instead of running continuously at full speed.

Potential advantages include:

• Adjustable airflow
• Smooth starting
• Reduced mechanical stress
• Process control
• Remote monitoring
• Centralized fault reporting
• Integration with plant automation

40. Advantages for Conveyor Systems

For conveyors, the drive can provide controlled acceleration and adjustable running speed.

This can help coordinate:

• Feed rate
• Conveyor speed
• Downstream machinery
• Production rate
• Material handling

The actual acceleration profile should be established from the conveyor mechanical design and load characteristics.

41. Advantages for Heavy Industrial Equipment

For heavy industrial machinery, a large-frame drive provides the current capacity needed for large motors.

Potential applications include:

• Heavy conveyors
• Crushers
• Pumps
• Fans
• Blowers
• Process machinery
• Material handling
• Large auxiliary drives

The 500 A rating provides a substantial operating range for high-power motor applications.

42. Maintenance Considerations

Maintenance planning for a high-power air-cooled drive should include regular inspection of the cooling system and electrical connections.

Typical maintenance activities include:

• Inspect cooling fans
• Inspect airflow paths
• Check for excessive dust
• Inspect power connections
• Inspect grounding connections
• Inspect cabinet ventilation
• Check communication connections
• Review drive fault history
• Review warning history
• Check abnormal operating temperatures
• Inspect surrounding equipment
• Follow applicable isolation procedures

Maintenance intervals should be based on the actual installation environment and operating conditions.

43. Environmental Considerations

The Type 1 / IP20 configuration should be installed in an environment appropriate for that enclosure rating.

Particular attention should be paid to:

• Dust
• Moisture
• Condensation
• Corrosive gases
• Ambient temperature
• Vibration
• Altitude
• Air quality
• Salt exposure
• Chemical exposure

If the installation environment is harsh, additional enclosure or environmental-control measures may be necessary.

44. Electrical Protection

A 500 A drive requires properly coordinated upstream protection.

The installation should consider:

• Main disconnect
• Circuit protection
• Short-circuit rating
• Ground-fault considerations
• Cable ampacity
• Transformer capacity
• Motor protection
• Coordination with upstream switchgear
• Emergency isolation
• Grounding system

The protective-device selection must be based on the actual installation and applicable electrical requirements rather than simply using the drive’s 500 A rating as the protective-device size.

45. Network and Control Advantages

The embedded EtherNet/IP capability can reduce the amount of hardwired control required.

For example, a control system can exchange information such as:

Controller → Drive

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

Drive → Controller

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

This structure is particularly useful in large plants with centralized automation.

46. Product Selection Checklist

Before selecting the 20G1ALF500JN0NNNNN, the following items should be confirmed:

Selection Item	Required Check
Model	20G1ALF500JN0NNNNN
Supply Voltage	Confirm 690 VAC system
Number of Phases	Confirm 3 phase
Motor Current	Confirm within applicable rating
Motor Power	Confirm LD/ND/HD requirement
Duty	Select LD, ND or HD based on actual load
Motor Type	Confirm compatible AC motor
Starting Requirement	Check acceleration torque
Braking	Confirm whether dynamic braking is required
Communication	Confirm EtherNet/IP requirement
HIM	Confirm whether local HIM is required
Environment	Confirm temperature, humidity, dust and altitude
Cooling	Confirm adequate airflow
Cabinet	Confirm Type 1/IP20 installation environment
Dimensions	Confirm final mechanical drawing
Weight	Confirm final shipping/mechanical weight
Cable	Confirm motor and incoming cable sizing
Grounding	Confirm plant grounding arrangement
Protection	Confirm upstream protection
Maintenance	Provide required service access

47. Product Identification Summary

Item	Details
Model	20G1ALF500JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Category	Variable-Frequency AC Drive
Voltage Class	690 VAC
Phase	3 Phase
Current	500 A
LD Rating	530 kW
ND Rating	500 kW
HD Rating	400 kW
Frame	Frame 8
Cooling	Forced Air
Enclosure	Type 1 / IP20
Mechanical Depth	800 mm
Communication	Embedded EtherNet/IP
Input	AC Input with Precharge
DC Terminals	None
Filter	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Approx. Height	2453 mm*
Approx. Width	600 mm*
Approx. Depth	800 mm
Approx. Weight	623 kg*

*Approximate planning values. Confirm the final mechanical drawing and shipment documentation before engineering or installation.

48. Final Technical Specification Table

Specification	20G1ALF500JN0NNNNN
Model	20G1ALF500JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product	PowerFlex 755 AC Drive
Drive Type	Variable-Frequency AC Drive
Input Voltage	690 VAC
Phase	3 Phase
Rated Current	500 A
LD Rating	530 kW
ND Rating	500 kW
HD Rating	400 kW
Frame	Frame 8
Cooling	Forced Air
Enclosure	Type 1 / IP20
MCC Style	800 mm Deep
Input	AC Input with Precharge
DC Terminals	No
Filter	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Approx. Height	2453 mm*
Approx. Width	600 mm*
Approx. Depth	800 mm
Approx. Weight	623 kg*
Typical Applications	Pumps, fans, blowers, conveyors, compressors, mining, cement, water systems and process machinery
Installation	Industrial electrical room, cabinet or MCC-style arrangement
Main Function	Variable-speed control of large AC motors

49. Overall Product Description

The Allen-Bradley 20G1ALF500JN0NNNNN is a high-power PowerFlex 755 AC drive intended for large three-phase motor applications.

Its 690 VAC, 500 A electrical rating places it in the high-power range of the PowerFlex 755 family. The drive provides published ratings of 530 kW LD, 500 kW ND and 400 kW HD, allowing the same drive platform to be applied to different load-duty requirements when the motor and application are correctly matched.

The Frame 8, air-cooled, 800 mm deep MCC-style construction is designed for large industrial installations where substantial power, cooling and mechanical space are required.

The integrated EtherNet/IP capability makes the drive suitable for modern industrial control systems where the drive needs to exchange commands, operating data and diagnostic information with the automation system.

The AC input with precharge, filtered configuration, CM jumper installed, no dynamic braking, and blank/no-HIM configuration define the specific hardware arrangement represented by the JN0 catalog number.

For engineering purposes, the most important points to verify before purchase and installation are the actual motor full-load current, required duty class, acceleration and braking requirements, 690 VAC supply compatibility, environmental conditions, cable arrangement, cabinet ventilation, mechanical clearances, and final equipment dimensions and weight.

The model is particularly suited to large industrial motor systems where high power, variable-speed operation and networked control are required.

Mechanical dimensions and weight marked as approximate are intended for preliminary planning only. The final mechanical drawing for the supplied unit should take precedence for cabinet fabrication, transportation, lifting, floor loading and installation.