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Allen-Bradley 20G1ALF460JN0NNNNN PowerFlex 755 AC Drive

1. Product Introduction

The Allen-Bradley 20G1ALF460JN0NNNNN is a high-power PowerFlex 755 AC drive designed for large three-phase industrial motors and demanding variable-speed applications.

This model belongs to the 690 VAC class of the PowerFlex 755 family and uses a Frame 8 high-power configuration. It is rated at 460 A, with application ratings of approximately 500 kW for light duty, 450 kW for normal duty, and 375 kW for heavy duty.

The drive is intended for industrial equipment where a motor needs more than simple start/stop control. It provides variable-speed motor control, controlled acceleration and deceleration, process adjustment, motor monitoring, protection functions, and integration into an industrial automation network.

With its 690 VAC three-phase input class, the 20G1ALF460JN0NNNNN is intended for large motor installations where substantial power must be controlled efficiently.

Typical applications include large pumps, fans, blowers, conveyors, water-treatment equipment, mining machinery, cement equipment, process machinery, and other high-power rotating equipment.

The model is configured as an air-cooled drive with forced-air cooling. The catalog configuration also specifies embedded EtherNet/IP, AC input with precharge, no DC terminals, standard protection, filtered operation with CM jumper installed, no dynamic braking, and a blank configuration without a HIM.

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2. Brand and Series

Item	Specification
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	AC Variable Frequency Drive
Model	20G1ALF460JN0NNNNN
Voltage Class	690 VAC
Input Phase	Three-phase
Rated Current	460 A
Frame	Frame 8
Cooling	Forced Air
Enclosure	IP20 / NEMA Type 1 MCC-style
Communication	Embedded EtherNet/IP
Input Configuration	AC input with precharge
Dynamic Braking	None
Filtering	Filtered
CM Configuration	CM jumper installed
HIM	Blank / No HIM
Main Application	High-power industrial motor control

The PowerFlex 755 series is designed for industrial variable-frequency drive applications where motor speed, torque, acceleration, process control, and automation-system integration are important.

The 20G1ALF460JN0NNNNN is one of the larger Frame 8 configurations within the 690 VAC PowerFlex 755 range.

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3. Complete Product Parameter Table

Parameter	Specification
Model	20G1ALF460JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Input Voltage	690 VAC class
Input Phase	3 Phase
Rated Output Current	460 A
Light-Duty Rating	500 kW
Normal-Duty Rating	450 kW
Heavy-Duty Rating	375 kW
Frame Size	Frame 8
Cooling Type	Forced Air
Enclosure Type	IP20 / NEMA Type 1
Cabinet Style	MCC Style
Cabinet Depth	800 mm
Approximate Height	2453 mm
Approximate Width	600 mm
Approximate Depth	800 mm
Approximate Weight	623 kg
Input Type	AC Input with Precharge
DC Terminals	No DC Terminals
Communication	Embedded EtherNet/IP
Protection	Standard Protection
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Motor Type	Three-phase AC motor
Application	Large industrial motor control
Installation	Industrial floor/cabinet installation
Cooling Requirement	Forced-air ventilation
Duty Capability	LD / ND / HD
Typical Equipment	Pumps, fans, blowers, conveyors and process machinery

The catalog information identifies this exact model as a 460 A, 690 VAC, three-phase, Frame 8 PowerFlex 755 drive with IP20 Type 1, 800 mm deep MCC-style construction.

The published Frame 8 mechanical data gives an approximate height of 2453 mm, width of 600 mm, and weight of 623 kg. The MCC-style Frame 8 arrangement is available with either 600 mm or 800 mm depth depending on the configuration; the requested model is specified as the 800 mm deep configuration.

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4. Electrical Parameters

Electrical Parameter	Specification
Model	20G1ALF460JN0NNNNN
Nominal Input Voltage	690 VAC
Input Phase	Three-phase
Rated Current	460 A
Light-Duty Power	500 kW
Normal-Duty Power	450 kW
Heavy-Duty Power	375 kW
Input Type	AC with precharge
Output	Variable-frequency three-phase AC
Frame	8
Cooling	Forced air
Dynamic Braking	None
Filtering	Filtered
Communication	Embedded EtherNet/IP
Enclosure	IP20 / Type 1 MCC style

The 690 VAC input class makes this drive suitable for large industrial motor installations.

The 460 A current rating provides the electrical capacity required for large motors, while the three duty classifications allow the same drive platform to be evaluated against different load profiles.

The published 690 VAC Frame 8 rating information identifies the 460 A configuration with approximately 500 kW light-duty, 450 kW normal-duty, and 375 kW heavy-duty capability.

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5. Understanding the LD, ND and HD Ratings

The drive has three important application ratings.

Duty Classification	Power Rating	Typical Load Character
Light Duty (LD)	500 kW	Lower overload requirement and suitable process load
Normal Duty (ND)	450 kW	General industrial variable-speed applications
Heavy Duty (HD)	375 kW	More demanding torque and overload conditions

The 500 kW light-duty rating provides the highest motor-power rating.

The 450 kW normal-duty rating is appropriate for many general-purpose industrial applications.

The 375 kW heavy-duty rating is particularly important when the application has higher torque demand, greater overload requirements, or more demanding acceleration characteristics.

Drive selection should always be based on the actual motor full-load current and load profile rather than simply selecting the drive according to the motor’s kW value.

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6. Rated Current

The main current rating of the 20G1ALF460JN0NNNNN is 460 A.

This is a substantial industrial drive rating intended for large motors.

The actual motor current should be compared with the drive’s applicable duty rating.

For example, a motor with a high starting torque requirement may require the heavy-duty rating even if its nominal kW value appears to fit within the light-duty rating.

The actual application should therefore be evaluated according to:

• Motor full-load current.
• Motor voltage.
• Motor power.
• Required starting torque.
• Continuous load.
• Overload requirements.
• Acceleration time.
• Deceleration time.
• Operating speed range.
• Motor inertia.
• Ambient temperature.
• Installation altitude.

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7. Mechanical Dimensions and Weight

Mechanical planning is particularly important for this model because it is a large Frame 8 industrial drive.

Mechanical Parameter	Value
Model	20G1ALF460JN0NNNNN
Frame	8
Height	2453 mm approx.
Width	600 mm approx.
Depth	800 mm
Weight	623 kg approx.
Enclosure	IP20 / Type 1
Cabinet Style	MCC Style
Cooling	Forced Air
Installation	Floor/cabinet type
Equipment Class	Large industrial drive

The approximate Frame 8 dimensions are 2453 mm high × 600 mm wide × 800 mm deep, with an approximate weight of 623 kg for the drive configuration.

The 623 kg weight should be considered during transportation, lifting, installation, floor loading, and maintenance planning.

The final mechanical drawing should be used for cabinet fabrication and installation because option cabinets and other configuration differences can change the overall dimensions and weight.

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8. Installation Space

The physical size of the drive means that adequate installation space should be planned around the equipment.

The installation area should provide enough space for:

• Incoming power cables.
• Motor cables.
• Control wiring.
• Communication cables.
• Ventilation.
• Maintenance.
• Inspection.
• Component replacement.
• Lifting and handling.
• Safe access.

The drive should not be installed in a location where airflow is restricted.

Heat generated by the power section must be removed from the installation area.

The surrounding cabinet arrangement should therefore be designed with appropriate ventilation and heat-dissipation provisions.

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9. Cooling System

The 20G1ALF460JN0NNNNN uses forced-air cooling.

At 460 A, the drive’s power electronics can generate significant heat during operation.

The cooling fans and airflow path are therefore important parts of the installation.

Airflow should remain unobstructed.

Dust, dirt, oil mist, moisture, and other contaminants should be controlled according to the requirements of the installation environment.

Periodic inspection of cooling fans and ventilation passages is recommended as part of normal industrial maintenance.

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10. IP20 / Type 1 MCC-Style Construction

The requested model is specified as an IP20, NEMA Type 1, 800 mm deep MCC-style configuration.

This configuration is intended for installation within an appropriate industrial electrical environment rather than for unrestricted outdoor exposure.

The enclosure arrangement provides a structured installation format for large drive equipment.

The surrounding electrical room or cabinet system should provide suitable environmental protection.

Where the installation environment contains excessive dust, moisture, corrosive gases, or other contaminants, the overall system enclosure and environmental controls should be evaluated carefully.

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11. Input Configuration

The 20G1ALF460JN0NNNNN uses an AC input with precharge configuration.

The precharge arrangement is important in large power-electronic systems because the drive contains substantial DC-link capacitance.

Controlled charging of the DC-link section helps manage the initial charging current when the drive is energized.

The model is also specified with no DC terminals, which distinguishes this configuration from PowerFlex 755 configurations intended for certain common-DC or DC-bus arrangements.

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12. Filtering and CM Jumper

The specified model includes a filtered configuration with the CM jumper installed.

The filtering arrangement is relevant to electromagnetic compatibility and high-frequency electrical behavior.

In a large industrial installation, proper cable routing, grounding, bonding, shielding, and motor-cable practices remain important even when filtering is included.

Motor cables should be routed separately from sensitive control and communication wiring where practical.

Proper grounding should be maintained throughout the drive, motor, cabinet, and plant electrical system.

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13. Dynamic Braking

The requested model is specified with no dynamic braking.

This does not mean the drive cannot control deceleration.

The drive can control a programmed deceleration profile, but the handling of regenerated energy depends on the load and braking arrangement.

Applications involving large inertia or frequent rapid deceleration should be evaluated separately.

Examples include:

• High-inertia fans.
• Large conveyors.
• Centrifuges.
• Large rotating machinery.
• Hoisting-related machinery.
• Rapid cycling equipment.

If the application generates substantial regenerative energy, the braking strategy should be engineered according to the actual load characteristics.

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14. Human Interface

The catalog configuration identifies the requested model as Blank / No HIM.

This type of configuration is useful where local operator control is not required or where the drive is intended to be operated primarily through an automation system.

A control system can provide start, stop, speed reference, status monitoring, alarm handling, and other functions through the appropriate control architecture.

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15. Embedded EtherNet/IP

One of the important features of this model is embedded EtherNet/IP communication.

This allows the drive to be incorporated into a plant automation network.

Typical network functions may include:

• Start and stop commands.
• Speed reference.
• Drive status.
• Output frequency.
• Output current.
• Fault information.
• Warning information.
• Operating status.
• Control references.
• Process-related information.

Network integration is particularly valuable when a facility contains multiple large drives.

Instead of operating each drive as a separate standalone device, the drives can become part of a coordinated automation system.

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16. Industrial Automation Applications

The 20G1ALF460JN0NNNNN is well suited to applications where a large AC motor needs variable-speed control.

Typical applications include:

Application	Typical Equipment
Water Treatment	Large pumps and blowers
Wastewater	Transfer pumps and aeration equipment
Mining	Conveyors, pumps and ventilation
Cement	Fans, conveyors and process machinery
Steel	Pumps, fans and material handling
Pulp and Paper	Process pumps and fans
Chemical Processing	Process pumps and blowers
Manufacturing	Large production machinery
Material Handling	Heavy conveyors
HVAC/Industrial Ventilation	Large fans and blowers
Power Utilities	Large auxiliary pumps and fans
General Process Industry	Large rotating equipment

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17. Pump Applications

Large pumps are one of the most common applications for high-power variable-frequency drives.

A pump does not always need to operate at maximum speed.

When the process requires lower flow, reducing motor speed can provide more appropriate operating conditions than continuously running the pump at full speed.

The drive can provide:

• Controlled acceleration.
• Controlled deceleration.
• Adjustable speed.
• Process-based flow control.
• Pressure control.
• Reduced mechanical shock.
• Better coordination with other pumps.

Large pumping applications may include:

• Raw-water pumping.
• Water transfer.
• Cooling-water circulation.
• Wastewater transfer.
• Industrial process water.
• Irrigation.
• Mining water systems.
• Chemical process pumping.

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18. Fan Applications

Large fans and blowers are another major application area.

Fan systems frequently experience changing airflow requirements.

A variable-frequency drive can adjust motor speed according to the required airflow.

Applications include:

• Industrial ventilation.
• Furnace fans.
• Exhaust systems.
• Dust collection.
• Mine ventilation.
• Cement process fans.
• Steel plant ventilation.
• Combustion-air systems.
• Process-air systems.

For centrifugal fan systems, operating at a reduced speed can substantially reduce mechanical power demand compared with continuous full-speed operation.

The actual energy performance depends on the fan design and process operating point.

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19. Conveyor Applications

The 20G1ALF460JN0NNNNN can be used for large conveyor systems where controlled starting and adjustable speed are required.

Large conveyor belts can contain substantial mechanical inertia.

If a heavily loaded conveyor is started abruptly, the resulting mechanical shock can affect:

• Belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Pulleys.
• Mechanical structures.

Using a controlled acceleration ramp allows the motor to build speed gradually.

This can provide smoother system operation.

The drive can also provide adjustable conveyor speed where the production process requires different material-flow rates.

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20. Mining Applications

Mining operations often use large motors for:

• Ore conveyors.
• Belt conveyors.
• Mine ventilation.
• Water pumping.
• Dewatering.
• Material handling.
• Processing equipment.
• Auxiliary machinery.

Large mining systems can benefit from variable-speed motor control because the operating load can change substantially.

A drive can provide controlled acceleration for conveyors and adjustable operation for pumps and ventilation equipment.

Mining installations also require careful consideration of ambient conditions, dust, temperature, altitude, cable lengths, and mechanical load.

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21. Cement and Aggregate Applications

Cement and aggregate facilities contain many large motors.

The PowerFlex 755 platform can be applied to:

• Large process fans.
• Exhaust fans.
• Conveyors.
• Material-handling systems.
• Large pumps.
• Dust collection systems.
• Cooling systems.
• Process machinery.

The drive’s high-power capability makes it suitable for equipment that requires hundreds of kilowatts of motor power.

Controlled acceleration can also help reduce mechanical stress during starting.

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22. Water and Wastewater Applications

Large water-treatment systems often contain multiple pumps and blowers.

A high-power VFD can be used to adjust pump speed according to:

• Tank level.
• Pipeline pressure.
• Flow demand.
• Treatment requirements.
• Operating schedule.
• System demand.

The same principle can be applied to large aeration blowers.

The drive can adjust motor speed to match process requirements rather than continuously operating equipment at maximum speed.

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23. Compressor Applications

Large compressors can also be controlled with variable-frequency drives where the compressor design permits variable-speed operation.

Potential applications include:

• Industrial air compressors.
• Process gas systems.
• Large ventilation-related machinery.
• Process plants.

Compressor applications require careful evaluation of the compressor operating range.

The minimum speed, maximum speed, torque characteristics, lubrication requirements, cooling requirements, and process operating limits should all be considered.

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24. Main Product Advantages

High Power Capacity

The 460 A rating makes this a high-capacity industrial drive.

It is intended for applications substantially larger than those handled by small and medium-size VFDs.

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690 VAC Voltage Class

The 690 VAC class is well suited to large industrial motors.

Higher motor voltage allows large amounts of power to be transferred at lower current than an equivalent lower-voltage system.

This can be useful for large motor installations and plant-wide electrical distribution.

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Multiple Duty Ratings

The 500 kW LD, 450 kW ND, and 375 kW HD ratings allow engineers to match the drive to different load characteristics.

This is important because two motors with the same kW rating can have very different torque and overload requirements.

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Controlled Acceleration

The drive can accelerate the motor according to a programmed ramp.

This can reduce mechanical shock and improve starting behavior.

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Controlled Deceleration

The drive can also control motor deceleration according to the application settings.

For high-inertia applications, the braking requirements must be evaluated separately.

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Variable-Speed Operation

The drive allows the motor to operate at different speeds according to the process requirement.

This is especially useful for pumps, fans, blowers, and conveyors.

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Network Integration

Embedded EtherNet/IP provides a practical method for incorporating the drive into a larger industrial automation architecture.

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Industrial Construction

The Frame 8 design is intended for large industrial installations where electrical power, thermal management, mechanical structure, and maintenance access all need to be considered.

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25. Same-Series / Related Model Recommendations

The following models are closely related 690 VAC PowerFlex 755 configurations and are useful for comparison when selecting a drive according to motor current and duty requirements.

Model	Voltage	Current	LD Rating	ND Rating	HD Rating	Frame
20G1ALF265JN0NNNNN	690 VAC	265 A	315 kW	250 kW	200 kW	8
20G1ALF330JN0NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	8
20G1ALF370JN0NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	8
20G1ALF415JN0NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8
20G1ALF500JN0NNNNN	690 VAC	500 A	530 kW	500 kW	400 kW	8

These ratings represent the same general 690 VAC Frame 8 progression around the 460 A model. The published 690 VAC rating data shows the corresponding 265 A, 330 A, 370 A, 415 A, 460 A, and 500 A range with increasing LD/ND/HD power capability.

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26. Related Model Selection Table

Model	Rated Current	LD	ND	HD	Voltage	Frame
20G1ALF265JN0NNNNN	265 A	315 kW	250 kW	200 kW	690 VAC	8
20G1ALF330JN0NNNNN	330 A	355 kW	315 kW	250 kW	690 VAC	8
20G1ALF370JN0NNNNN	370 A	400 kW	355 kW	300 kW	690 VAC	8
20G1ALF415JN0NNNNN	415 A	450 kW	400 kW	355 kW	690 VAC	8
20G1ALF460JN0NNNNN	460 A	500 kW	450 kW	375 kW	690 VAC	8
20G1ALF500JN0NNNNN	500 A	530 kW	500 kW	400 kW	690 VAC	8

The 460 A configuration sits between the 415 A and 500 A versions.

This makes it a practical selection point for large motors whose current requirements exceed the 415 A class but remain within the 460 A rating.

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27. Five Same-Brand Reference Models

For the requested same-brand comparison, the following models provide useful reference points within the Allen-Bradley PowerFlex range.

They are presented as reference models rather than a popularity ranking, because actual market demand varies by voltage, country, industry, motor size, and project requirements.

Model	Voltage	Current / Power Class	Frame	Main Application
20G1ALF265JN0NNNNN	690 VAC	265 A / 315 kW LD	8	Pumps and fans
20G1ALF330JN0NNNNN	690 VAC	330 A / 355 kW LD	8	Process machinery
20G1ALF370JN0NNNNN	690 VAC	370 A / 400 kW LD	8	Large pumps and fans
20G1ALF415JN0NNNNN	690 VAC	415 A / 450 kW LD	8	Conveyors and process equipment
20G1ALF500JN0NNNNN	690 VAC	500 A / 530 kW LD	8	Large industrial machinery

The five models above are especially useful as comparison points because they belong to the same general high-power 690 VAC PowerFlex 755 group.

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28. Same-Brand Reference Model Parameters

Model	Current	LD Power	ND Power	HD Power	Voltage	Frame
20G1ALF265JN0NNNNN	265 A	315 kW	250 kW	200 kW	690 VAC	8
20G1ALF330JN0NNNNN	330 A	355 kW	315 kW	250 kW	690 VAC	8
20G1ALF370JN0NNNNN	370 A	400 kW	355 kW	300 kW	690 VAC	8
20G1ALF415JN0NNNNN	415 A	450 kW	400 kW	355 kW	690 VAC	8
20G1ALF500JN0NNNNN	500 A	530 kW	500 kW	400 kW	690 VAC	8

The 690 VAC Frame 8 rating progression confirms the relationship between these current ratings and their LD, ND, and HD power classifications.

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29. Mechanical Planning

For the 20G1ALF460JN0NNNNN, the approximate mechanical envelope is:

Mechanical Item	Approximate Specification
Model	20G1ALF460JN0NNNNN
Height	2453 mm
Width	600 mm
Depth	800 mm
Weight	623 kg
Frame	8
Cabinet Type	MCC Style
Protection Class	IP20 / Type 1
Cooling	Forced Air

The 2453 mm height and 600 mm width are published Frame 8 MCC-style dimensions, while the 800 mm depth corresponds to the deeper MCC configuration identified for this model. The approximate 623 kg weight is the published Frame 8 drive weight.

Because the equipment is approximately 2.45 m high and weighs over half a metric ton, transportation and installation should be planned before delivery.

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30. Floor Loading and Handling

The approximately 623 kg equipment weight is an important engineering consideration.

The installation floor or supporting structure should be checked for adequate load capacity.

The equipment should also be handled using appropriate lifting equipment.

The lifting procedure should consider:

• Total equipment weight.
• Center of gravity.
• Lifting points.
• Transportation route.
• Door and access dimensions.
• Floor loading.
• Installation orientation.
• Final cabinet position.

This is particularly important for projects where the drive is installed inside an electrical room with restricted access.

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31. Maintenance Advantages

Large industrial drives should be included in a planned maintenance program.

Important maintenance areas include:

Maintenance Area	Recommended Inspection
Cooling Fans	Check noise, vibration and airflow
Airflow Paths	Check for dust and blockage
Power Connections	Inspect for overheating or loose connections
Grounding	Check grounding integrity
Motor Cables	Inspect insulation and connections
Control Wiring	Check terminals and wiring condition
Network Connection	Check communication integrity
Cabinet	Check cleanliness and ventilation
Fault History	Review repeated faults and warnings
Ambient Conditions	Check temperature, moisture and contamination

Preventive maintenance can help identify cooling problems, electrical connection problems, contamination, and abnormal operating conditions before they become major failures.

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32. Energy Management Applications

Variable-speed drives are particularly useful when the process load changes during operation.

For centrifugal pumps and fans, motor speed has a strong influence on mechanical power demand.

If the process does not require full flow or full airflow, reducing motor speed can reduce the required mechanical power.

The actual energy-saving result depends on:

• Equipment design.
• Operating point.
• Daily operating hours.
• Load profile.
• Motor efficiency.
• Drive efficiency.
• Process requirements.
• Control strategy.

Therefore, an energy-saving calculation should be based on actual operating data.

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33. Application Advantages for Pumps

Advantage	Result
Variable Speed	Adjust flow according to process requirements
Soft Acceleration	Reduced mechanical starting shock
Pressure Control	Better process regulation
Flow Control	Flexible pump operation
Network Monitoring	Centralized status information
Multiple Pump Coordination	Easier plant-level control
Reduced Throttling	Potentially improved system efficiency

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34. Application Advantages for Fans

Advantage	Result
Speed Adjustment	Airflow can follow process demand
Controlled Starting	Reduced starting stress
Process Control	Better ventilation control
Network Integration	Centralized monitoring
Variable Operation	Reduced unnecessary full-speed operation
Large Motor Capability	Suitable for high-power fans

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35. Application Advantages for Conveyors

Advantage	Result
Controlled Acceleration	Reduced belt and gearbox shock
Adjustable Speed	Flexible production rate
Large Current Capacity	Suitable for large conveyor motors
Process Integration	Easy connection to automation systems
Controlled Stopping	More predictable stopping behavior
Load Management	Better control of heavy starting loads

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36. Application Advantages for Mining

The 20G1ALF460JN0NNNNN can be useful for large mining applications where high-power motors must operate reliably under changing loads.

Potential applications include:

• Long conveyors.
• Dewatering pumps.
• Mine ventilation fans.
• Material handling.
• Process pumps.
• Auxiliary machinery.

The final application design should consider the mining environment, dust level, ambient temperature, altitude, mechanical loading, motor cable length, and required protection system.

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37. Application Advantages for Cement Plants

Cement and aggregate equipment frequently uses large motors with long operating hours.

The drive can be used for:

• Process fans.
• Conveyors.
• Material-handling systems.
• Pumps.
• Ventilation equipment.
• Dust extraction systems.

The variable-speed capability allows equipment operation to be adjusted to production requirements.

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38. Application Advantages for Water Treatment

Water and wastewater systems often operate under changing flow requirements.

The drive can help control large pumps according to actual demand.

Potential control variables include:

• Flow.
• Pressure.
• Tank level.
• Process demand.
• Operating schedule.

The same high-power drive platform can also be applied to large blowers and other rotating equipment.

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39. Industrial Communication

Embedded EtherNet/IP provides a practical connection between the drive and the plant control system.

A typical system may include:

Controller → Industrial Ethernet Network → PowerFlex 755 Drive → Motor

The controller can issue commands while the drive handles the motor-control function.

The drive can also return operational information to the control system.

This arrangement is useful in large facilities where several motors must be monitored and coordinated.

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40. Motor Compatibility

The drive is designed for large three-phase AC motor applications.

Before final selection, the following motor information should be checked:

• Motor voltage.
• Motor full-load current.
• Motor power.
• Motor frequency.
• Motor speed.
• Motor service factor.
• Motor insulation system.
• Motor cable length.
• Motor cooling arrangement.
• Required overload.
• Required starting torque.

The drive should be sized according to the motor current and application duty rather than simply matching the motor’s nameplate kW.

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41. Important Application Selection Factors

Selection Factor	Why It Matters
Motor Current	Determines required drive current capacity
Motor Voltage	Must match the drive voltage class
Motor Power	Defines the general drive size
Load Type	Determines LD/ND/HD suitability
Starting Torque	Important for conveyors and heavy machinery
Inertia	Influences acceleration and deceleration
Braking	Important for regenerative loads
Speed Range	Determines operating limits
Ambient Temperature	May affect drive capacity
Altitude	May require derating
Cooling	Essential for high-power operation
Cable Length	Can affect motor-side electrical conditions
Network	Determines automation integration
Installation Space	Important for Frame 8 equipment
Weight	Important for structural and lifting planning

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42. Advantages of the Frame 8 Configuration

Frame 8 is intended for high-power drive applications.

Its main advantages include:

• High current capability.
• Large motor-power range.
• Industrial cabinet construction.
• High-capacity cooling.
• Suitable for large process equipment.
• Large electrical connection capacity.
• Suitable for centralized industrial installations.
• Flexible control-system integration.

The physical size is considerably larger than small and medium-frame drives, but this is expected for a drive capable of controlling motors in the several-hundred-kilowatt range.

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43. Product Specification Summary

Specification	20G1ALF460JN0NNNNN
Model	20G1ALF460JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	High-Power AC Drive
Voltage	690 VAC
Phase	3 Phase
Current	460 A
Light Duty	500 kW
Normal Duty	450 kW
Heavy Duty	375 kW
Frame	8
Cooling	Forced Air
Enclosure	IP20 / Type 1
Cabinet Style	MCC Style
Depth	800 mm
Height	2453 mm approx.
Width	600 mm approx.
Weight	623 kg approx.
Input	AC with Precharge
DC Terminals	None
Communication	Embedded EtherNet/IP
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Main Applications	Pumps, fans, blowers, conveyors, compressors, process equipment

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44. Final Product Description

The Allen-Bradley 20G1ALF460JN0NNNNN PowerFlex 755 AC Drive is a high-power industrial variable-frequency drive designed for large three-phase AC motors.

Its 690 VAC, 460 A electrical rating places it firmly in the high-power industrial category.

With approximately 500 kW light-duty, 450 kW normal-duty, and 375 kW heavy-duty capability, the drive can be matched to different industrial load profiles.

The Frame 8 construction provides the physical and electrical capacity required for large motor applications.

The drive is specified with forced-air cooling, IP20 / Type 1 MCC-style construction, 800 mm depth, embedded EtherNet/IP, AC input with precharge, filtered operation, CM jumper installed, no dynamic braking, and no HIM.

Its approximate physical size is 2453 mm high × 600 mm wide × 800 mm deep, with an approximate weight of 623 kg.

The drive is well suited to large pumps, fans, blowers, conveyors, mining machinery, cement equipment, water-treatment systems, process equipment, and other large rotating machinery.

For pump and fan applications, variable-speed control can help match motor operation to changing process requirements.

For conveyor applications, controlled acceleration can reduce mechanical stress during starting.

For mining and heavy industry, the high current capacity and large-frame construction provide a practical platform for large motor applications.

For automated plants, embedded EtherNet/IP allows the drive to be incorporated into a broader control and monitoring system.

When selecting the drive for a final installation, the motor full-load current, motor voltage, duty classification, overload requirements, acceleration and deceleration characteristics, braking requirements, ambient conditions, altitude, cooling, cable arrangement, and installation structure should all be considered.

The 20G1ALF460JN0NNNNN is therefore best regarded as a large industrial PowerFlex 755 drive for applications where high motor power, controlled speed, reliable operation, and automation-system integration are required.