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Allen-Bradley 20G11TF500JN0NNNNN PowerFlex 755 AC Drive

Detailed Technical Parameters, Product Introduction, Applications, Advantages and Related Model Recommendations

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1. Product Overview

The 20G11TF500JN0NNNNN is a high-power air-cooled AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase AC motors used in demanding industrial environments. With a 690 V AC three-phase voltage class and a 500 A output-current rating, this drive is intended for applications where motor power can reach several hundred kilowatts.

Depending on the selected duty classification, the drive provides approximately 530 kW Light-Duty, 500 kW Normal-Duty and 400 kW Heavy-Duty capability.

This makes the product suitable for large pumps, fans, blowers, conveyors, crushers, mills, mining equipment, cement machinery, steel-processing equipment and other large industrial machines.

The drive uses a Frame 8, open-type, air-cooled construction. It is a substantial piece of industrial electrical equipment and is normally incorporated into a properly engineered cabinet or floor-mounted electrical installation.

The model also includes embedded EtherNet/IP, AC input with precharge, DC terminals, filtering and an installed common-mode capacitor jumper.

The J configuration in the catalog number is particularly important because it identifies the configuration with the common-mode capacitor jumper installed.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Type	High-Power AC Variable Frequency Drive
Catalog Number	20G11TF500JN0NNNNN
Voltage Class	690 V AC
Phase	Three Phase
Cooling	Forced Air / Air Cooled
Frame	Frame 8
Enclosure	Open Type
Input	AC Input with Precharge
Communication	Embedded EtherNet/IP
Main Application	Large Industrial AC Motors

The PowerFlex 755 family is designed for industrial applications where motor control requirements are more demanding than those normally handled by compact general-purpose drives.

The family covers different voltage classes, current ratings, frame sizes and application configurations.

The 20G11TF500JN0NNNNN is positioned toward the high-power end of the 690 V range.

It is therefore better suited to large production equipment than to small machine-building applications.

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3. Complete Product Parameter Table

Parameter	Specification
Model	20G11TF500JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive Type	AC Variable Frequency Drive
Input Voltage	690 V AC class
Input Phase	3 Phase
Input Frequency	50/60 Hz system dependent
Current Rating	500 A class
Light-Duty Current	Approx. 530 A
Normal-Duty Current	Approx. 500 A
Heavy-Duty Current	Approx. 413 A
Light-Duty Power	Approx. 530 kW
Normal-Duty Power	Approx. 500 kW
Heavy-Duty Power	Approx. 400 kW
Input Type	AC Input with Precharge
DC Terminals	Yes
Cooling	Forced Air
Frame Size	Frame 8
Enclosure Type	Open Type
Filtering	Filtered
CM Capacitor Jumper	Installed
Communication	Embedded EtherNet/IP
Local HIM	None / Blank
Dynamic Braking	None in basic configuration
Approx. Height	2145 mm
Approx. Width	778 mm
Approx. Depth	425 mm
Approx. Weight	286 kg
Mounting	Floor / Cabinet Installation
Typical Motor Range	Several hundred kW
Main Applications	Pumps, fans, conveyors, crushers, mills, process equipment

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4. Electrical Specifications

The electrical rating is one of the most important characteristics of this model.

The drive is intended for a 690 V AC, three-phase power system and provides a 500 A class output rating.

Electrical Parameter	Value
Voltage Class	690 V AC
Number of Phases	3
Frequency	50/60 Hz
Base Current	500 A
Light-Duty Current	Approx. 530 A
Normal-Duty Current	Approx. 500 A
Heavy-Duty Current	Approx. 413 A
Light-Duty Power	Approx. 530 kW
Normal-Duty Power	Approx. 500 kW
Heavy-Duty Power	Approx. 400 kW
Input Configuration	AC with Precharge
DC Terminals	Included
Output	Variable-Frequency AC
Cooling	Forced Air
Frame	8

The actual motor selection should be based on the motor nameplate current rather than relying only on the motor’s kW rating.

This is especially important for large motors because two motors with similar power ratings can have different current requirements depending on motor efficiency, power factor, voltage and operating conditions.

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5. Light-Duty, Normal-Duty and Heavy-Duty Ratings

The 20G11TF500JN0NNNNN has three important power ratings.

Duty Classification	Approx. Output Current	Approx. Power
Light Duty	530 A	530 kW
Normal Duty	500 A	500 kW
Heavy Duty	413 A	400 kW

Light Duty

Light Duty is generally associated with applications where the load is relatively smooth and the motor does not require frequent high overload operation.

Large fans and some pump applications are examples where this type of rating can be appropriate.

Normal Duty

Normal Duty provides a general industrial rating for applications with more conventional load characteristics.

The approximately 500 kW Normal-Duty rating is an important reference point for this particular model.

Heavy Duty

Heavy Duty is intended for applications where higher torque or overload capability is required.

Examples can include:

• Loaded conveyors
• Crushers
• Mills
• Heavy material-handling equipment
• High-inertia machines

For these applications, the Heavy-Duty rating should be used when calculating the appropriate drive size.

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6. Dimensions and Weight

The 20G11TF500JN0NNNNN is a large Frame 8 drive.

Mechanical Parameter	Approximate Value
Height	2145 mm
Width	778 mm
Depth	425 mm
Weight	Approx. 286 kg
Frame	Frame 8
Construction	Open Type
Cooling	Forced Air
Installation	Floor / Cabinet

The approximately 286 kg value represents the drive assembly and should not be confused with the weight of a complete cabinet.

Once the drive is installed together with cabinet structures, power-distribution equipment, disconnect equipment, busbars, cables, control equipment and auxiliary components, the total system weight can be substantially higher.

For that reason, the complete installation should be evaluated for floor loading and lifting requirements.

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7. Physical Installation

The approximate dimensions of 2145 × 778 × 425 mm make this a large industrial installation.

The height is particularly important when designing an electrical room or cabinet.

The installation area should provide enough room for:

• Power cable routing
• Motor cable routing
• Control wiring
• Network wiring
• Cooling airflow
• Fan maintenance
• Electrical inspection
• Troubleshooting
• Component replacement

The cabinet should also provide sufficient room for cable bending and termination.

The drive should not simply be placed into a cabinet based on its external dimensions alone.

The complete installation must consider airflow, heat dissipation, access and cable routing.

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8. Product Construction

The basic electrical power path can be represented as follows:

690 V AC Three-Phase Supply

↓

Input Section

↓

Precharge Circuit

↓

DC Bus

↓

Power Inverter

↓

Variable-Frequency AC Output

↓

Three-Phase Motor

↓

Mechanical Load

The drive converts the incoming electrical power into a controlled AC output.

The output frequency and voltage can be controlled according to the motor-control strategy.

This allows the motor to operate at different speeds rather than being restricted to a single fixed-frequency operating point.

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9. Product Introduction

The 20G11TF500JN0NNNNN is designed for large industrial motor applications where simple start/stop control is not enough.

A large motor can draw substantial current during startup and can transmit significant mechanical torque to the connected machine.

Using a variable frequency drive allows the starting process to be controlled.

The motor can gradually accelerate instead of immediately reaching full operating speed.

The same principle can be applied during stopping.

This is particularly valuable for large machines with high inertia or equipment where sudden changes in torque can create mechanical stress.

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10. Main Product Advantages

10.1 High-Power Motor Control

The most obvious advantage of this model is its high power capacity.

With a 500 A class output, it is intended for very large motors.

The approximately 530 kW Light-Duty rating and 500 kW Normal-Duty rating put this drive firmly into the large industrial equipment category.

It is therefore appropriate for applications where compact drives would not provide enough current or power.

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10.2 690 V Three-Phase Operation

The 690 V class is particularly useful for high-power motor systems.

As motor power increases, electrical current becomes an increasingly important part of system design.

A higher-voltage system can deliver large amounts of power without requiring the same current that would be required at a substantially lower voltage.

This makes 690 V systems practical for large industrial motors.

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10.3 Adjustable Speed

A variable-frequency drive allows the motor speed to be changed according to process requirements.

This is especially useful for:

• Pumps
• Fans
• Blowers
• Conveyors
• Process machines

For example, a pump may not need to operate at maximum speed throughout the entire production cycle.

The drive can reduce speed when process demand is lower.

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10.4 Controlled Acceleration

Starting a large motor directly can produce a sudden electrical and mechanical demand.

The drive can provide a controlled acceleration ramp.

A simplified acceleration sequence might be:

0% → 25% → 50% → 75% → 100%

rather than applying full operating conditions immediately.

This can reduce mechanical shock on the driven equipment.

Potential benefits include reduced stress on:

• Shafts
• Couplings
• Gearboxes
• Conveyor belts
• Pump assemblies
• Fan assemblies
• Mechanical transmission systems

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10.5 Controlled Deceleration

Large rotating equipment can contain considerable stored mechanical energy.

A large fan, conveyor or mill may continue rotating after the drive command is removed.

Controlled deceleration allows the stopping behavior to be managed.

This can be important when the process requires a predictable stopping time.

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10.6 High Torque Capability

The drive is suitable for large machines where torque requirements are significant.

Applications such as crushers, loaded conveyors and mills can place considerable demands on the motor during starting and operation.

For these applications, the Heavy-Duty rating is particularly important.

The approximate 400 kW Heavy-Duty rating should not be exceeded simply because the motor’s nominal kW rating appears close to the value.

Motor current and load characteristics should always be checked.

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10.7 Industrial Network Integration

Embedded EtherNet/IP provides a convenient way to integrate the drive into a larger automation system.

A typical arrangement is:

Operator HMI

↓

PLC

↓

Industrial Ethernet

↓

PowerFlex 755

↓

690 V AC Motor

↓

Industrial Machine

The drive can therefore exchange operating information with the control system.

Typical information can include:

• Speed command
• Start/stop status
• Motor speed
• Current
• Fault status
• Drive status
• Process-related commands

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11. Application — Large Pumps

Large pumps are a natural application for this class of drive.

Possible applications include:

• Industrial water systems
• Cooling-water circulation
• Process-water systems
• Wastewater
• Mining slurry
• Irrigation
• Utility pumping
• Chemical-process pumping

The drive allows pump speed to be adjusted according to process demand.

For variable-torque pump systems, reducing motor speed can provide an opportunity to reduce energy consumption.

The actual energy performance depends on the pump curve, system resistance, required flow, operating schedule and control strategy.

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12. Application — Large Fans

Large fans and blowers can consume substantial amounts of power.

Potential applications include:

• Furnace ventilation
• Industrial ventilation
• Exhaust systems
• Cooling systems
• Dust collection
• Process-air systems
• Cement plants
• Steel plants
• Chemical-processing facilities

The drive allows airflow to be adjusted by changing motor speed.

This can provide greater process flexibility than operating the fan permanently at full speed.

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13. Application — Large Conveyors

Conveyor systems can require substantial starting torque, particularly when the conveyor is loaded.

Potential applications include:

• Mining conveyors
• Cement conveyors
• Aggregate conveyors
• Port equipment
• Bulk material handling
• Steel-processing systems
• Large production lines

The controlled acceleration function can help reduce the sudden application of torque to the belt and gearbox.

For long conveyors, this can be particularly useful because mechanical shock can propagate through the entire conveyor system.

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14. Application — Crushers

Crushers represent a much more demanding motor load.

Typical characteristics include:

• High starting torque
• Large mechanical inertia
• Sudden load changes
• Heavy continuous operation
• Potential shock loading

For crusher applications, the Heavy-Duty rating should receive particular attention.

The approximately 400 kW Heavy-Duty capability of the 20G11TF500JN0NNNNN can make it suitable for large crusher motors when the motor current and mechanical requirements are within the drive’s rating.

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15. Application — Mills

Large grinding and processing mills can require several hundred kilowatts.

Potential applications include:

• Mineral processing
• Cement grinding
• Raw-material processing
• Industrial grinding
• Bulk-material processing

Variable-speed operation can be useful when the process requires different operating speeds.

Controlled acceleration can also be useful for high-inertia rotating equipment.

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16. Application — Mining

Mining facilities frequently use large electrical motors.

The drive can be considered for:

• Crushers
• Conveyors
• Slurry pumps
• Ventilation fans
• Material-handling equipment
• Processing equipment
• Ore-processing systems

Mining environments can be demanding, so the complete installation should be designed around dust, temperature, ventilation and maintenance requirements.

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17. Application — Cement Plants

Cement production contains many large motor loads.

Possible applications include:

• Raw-material conveyors
• Crushers
• Grinding systems
• Large process fans
• Dust-collection fans
• Process pumps
• Material-handling equipment

The drive can be integrated into the plant’s automation system so that motor speed and operating status become part of the overall production process.

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18. Application — Steel and Metal Processing

Large metal-processing systems can also require high-power variable-speed motors.

Potential applications include:

• Cooling pumps
• Large fans
• Conveyors
• Material-handling equipment
• Process machinery
• Auxiliary production equipment

Variable-speed operation can be useful when production conditions change throughout the process.

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19. Application — Large Process Machinery

Other potential applications include:

• Large mixers
• Agitators
• Rotary machines
• High-power production equipment
• Material-handling systems
• Large auxiliary machinery

The suitability of the drive depends on the motor current, torque characteristics, acceleration requirements and operating cycle.

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20. Filtering and Common-Mode Capacitor Jumper

The J configuration is an important feature of this catalog number.

The relevant configuration can be summarized as follows:

Configuration	Common-Mode Capacitor Jumper
A	Removed
J	Installed

Therefore:

20G11TF500JN0NNNNN

has the J configuration, meaning the common-mode capacitor jumper is installed.

This is one of the reasons why the complete catalog number matters when ordering a replacement.

A model with the same current rating but an A configuration should not automatically be assumed to be electrically identical in every respect.

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21. Comparison of A and J Configurations

Parameter	20G11TF500AN0NNNNN	20G11TF500JN0NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	690 V	690 V
Current	500 A	500 A
LD Power	Approx. 530 kW	Approx. 530 kW
ND Power	Approx. 500 kW	Approx. 500 kW
HD Power	Approx. 400 kW	Approx. 400 kW
Frame	8	8
Filtering	Filtered	Filtered
CM Jumper	Removed	Installed
HIM	None	None
Main Difference	A configuration	J configuration

The basic power rating is essentially the same, but the filtering and common-mode capacitor configuration is different.

This distinction can matter when replacing an existing drive in a system with specific EMC, motor-cable or grounding requirements.

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22. No-HIM Configuration

The catalog configuration is supplied without a local HIM.

This is often practical for automated installations where the drive is operated through a PLC, HMI or industrial network.

A typical control structure could be:

Central HMI

↓

PLC

↓

Industrial Network

↓

Drive

↓

Motor

The drive does not necessarily need to have a permanent local operator keypad when all operational commands are handled remotely.

This can be particularly useful when the drive is installed inside a large electrical cabinet or dedicated motor-control area.

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23. Cooling and Thermal Management

The 20G11TF500JN0NNNNN is an air-cooled high-power drive.

At several hundred kilowatts, heat management becomes an important part of the installation.

The electrical room or cabinet should provide adequate ventilation.

Important considerations include:

• Ambient temperature
• Airflow
• Dust level
• Fan operation
• Cabinet ventilation
• Heat generated by nearby equipment
• Filter condition
• Installation altitude

The cooling system should be considered as part of the complete drive installation rather than as an isolated component.

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24. Maintenance Considerations

Regular maintenance is important for large industrial drives.

Maintenance Item	Purpose
Cooling Fans	Maintain required airflow
Air Passages	Prevent thermal buildup
Power Connections	Prevent loose electrical connections
Control Wiring	Maintain reliable control signals
Network Connections	Maintain communication
Grounding	Maintain electrical integrity
Cabinet Ventilation	Maintain acceptable temperature
Dust Inspection	Prevent contamination
Fault History	Identify recurring problems
Temperature Monitoring	Detect abnormal operating conditions

The maintenance interval should be adjusted to the actual environment.

A clean indoor electrical room may require less frequent cleaning than a dusty mining or cement installation.

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25. Advantages for Energy Management

One of the practical advantages of variable-speed motor control is the ability to match motor operation to process demand.

This can be particularly valuable for variable-torque loads.

For example, a pump or fan may operate at full capacity during peak production but at reduced capacity during lower-demand periods.

A variable-frequency drive can reduce motor speed instead of maintaining full speed continuously.

This can create opportunities for energy reduction.

The actual savings depend on the complete mechanical system and should be calculated from real operating conditions.

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26. Advantages for Mechanical Equipment

The drive can provide smoother machine operation.

Controlled acceleration reduces abrupt torque application.

Controlled deceleration can reduce abrupt stopping behavior.

This can be beneficial for:

• Gearboxes
• Couplings
• Shafts
• Belts
• Pumps
• Fans
• Conveyors
• Rotating equipment

The actual mechanical benefit depends on the machine design and the selected drive parameters.

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27. Advantages for Production Control

A large industrial motor is often directly connected to production output.

For example:

Process	Motor Speed Relationship
Pump	Speed affects flow
Fan	Speed affects airflow
Conveyor	Speed affects material throughput
Mixer	Speed affects mixing conditions
Process Machine	Speed affects production rate
Blower	Speed affects air delivery

The drive can therefore provide a direct electrical means of adjusting production conditions.

This can be much more flexible than changing mechanical components.

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28. Five Recommended Same-Series Models

The following models are closely related PowerFlex 755 690 V configurations.

Model	Voltage	LD Current	LD Power	ND Current	ND Power	HD Current	HD Power	Frame	Approx. Dimensions	Approx. Weight
20G11TF265JN0NNNNN	690 V	330 A	315 kW	265 A	250 kW	215 A	200 kW	8	Approx. 2145 × 778 × 425 mm	Approx. 286 kg
20G11TF330JN0NNNNN	690 V	370 A	355 kW	330 A	315 kW	265 A	250 kW	8	Approx. 2145 × 778 × 425 mm	Approx. 286 kg
20G11TF370JN0NNNNN	690 V	410 A	400 kW	370 A	355 kW	308 A	300 kW	8	Approx. 2145 × 778 × 425 mm	Approx. 286 kg
20G11TF415JN0NNNNN	690 V	460 A	450 kW	415 A	400 kW	370 A	355 kW	8	Approx. 2145 × 778 × 425 mm	Approx. 286 kg
20G11TF460JN0NNNNN	690 V	500 A	500 kW	460 A	450 kW	375 A	375 kW	8	Approx. 2145 × 778 × 425 mm	Approx. 286 kg

These models are useful for applications where the motor requirement is below the 500 A class.

The 20G11TF460JN0NNNNN is especially close to the reference model and is worth considering when the required current is slightly lower.

The 265 A, 330 A and 370 A models provide progressively lower capacity.

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29. Five Higher-Capacity Related Configurations

When the motor requirement exceeds the Frame 8 500 A class, larger-frame versions can be considered.

Model	Voltage	LD Current	LD Power	ND Current	ND Power	HD Current	HD Power	Frame	Approx. Weight
20G11TF590JN0NNNNN	690 V	650 A	630 kW	590 A	560 kW	460 A	450 kW	9	Approx. 400 kg class
20G11TF650JN0NNNNN	690 V	710 A	710 kW	650 A	630 kW	500 A	500 kW	9	Approx. 400 kg class
20G11TF710JN0NNNNN	690 V	790 A	800 kW	710 A	710 kW	590 A	560 kW	9	Approx. 400 kg class
20G11TF765JN0NNNNN	690 V	860 A	850 kW	765 A	750 kW	650 A	630 kW	9	Approx. 400 kg class
20G11TF500JN2NNNNN	690 V	Configuration dependent	Configuration dependent	Configuration dependent	Configuration dependent	Configuration dependent	Configuration dependent	Application dependent	Configuration dependent

The larger Frame 9 configurations should be treated as a different mechanical class.

Their final dimensions and weights depend more strongly on the exact cabinet, power-structure and installation configuration.

For cabinet fabrication, the exact mechanical drawing for the selected configuration should always be used.

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30. Five Same-Brand Popular Related Models

The following models cover different motor-power ranges and are useful for comparison with the 20G11TF500JN0NNNNN.

Model	Series	Voltage Class	Current / Capacity	Typical Application	Approx. Dimensions	Approx. Weight
25B-D017N114	PowerFlex 525	480 V class	17 A class	Small machines	Approx. 220 × 130 × 180 mm	Approx. 4–5 kg
25B-D024N114	PowerFlex 525	480 V class	24 A class	Pumps, fans, conveyors	Approx. 220 × 130 × 180 mm	Approx. 4–5 kg
25B-D030N114	PowerFlex 525	480 V class	30 A class	Medium machinery	Approx. 220 × 130 × 180 mm	Approx. 5 kg
20F1ANC140JA0NNNNN	PowerFlex 753	480 V class	140 A class	Medium/high-power machinery	Approx. 880 × 430 × 350 mm class	Approx. 73–109 kg
20G11TF460JN0NNNNN	PowerFlex 755	690 V class	460 A class	Large industrial motors	Approx. 2145 × 778 × 425 mm	Approx. 286 kg

These models are not direct electrical substitutes for the 20G11TF500JN0NNNNN.

They represent different voltage classes, power ranges and physical sizes.

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31. 25B-D017N114

Parameter	Specification
Model	25B-D017N114
Series	PowerFlex 525
Voltage	480 V class
Current	Approx. 17 A
Drive Type	AC Variable Frequency Drive
Application	Small and medium machines
Typical Loads	Pumps, fans, conveyors
Approx. Dimensions	220 × 130 × 180 mm
Approx. Weight	4–5 kg
Installation	Compact Panel Mount

This is a compact drive and is intended for a completely different power range from the 500 A-class PowerFlex 755.

Its advantage is its small physical footprint.

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32. 25B-D024N114

Parameter	Specification
Model	25B-D024N114
Series	PowerFlex 525
Voltage	480 V class
Current	Approx. 24 A
Drive Type	AC Variable Frequency Drive
Application	General industrial machinery
Typical Loads	Pumps, fans, conveyors
Cooling	Air Cooled
Approx. Dimensions	220 × 130 × 180 mm
Approx. Weight	4–5 kg
Installation	Panel Mount

This model is suitable for applications where a compact drive is preferred.

It is not intended to replace a 500 A-class drive.

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33. 25B-D030N114

Parameter	Specification
Model	25B-D030N114
Series	PowerFlex 525
Voltage	480 V class
Current	Approx. 30 A
Drive Type	AC Variable Frequency Drive
Application	Medium industrial machinery
Typical Loads	Pumps, fans, conveyors, machine tools
Cooling	Air Cooled
Approx. Dimensions	220 × 130 × 180 mm
Approx. Weight	Approx. 5 kg
Installation	Panel Mount

This is another compact option for smaller motors.

Compared with the 20G11TF500JN0NNNNN, it is dramatically smaller in both current capacity and physical size.

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34. 20F1ANC140JA0NNNNN

Parameter	Specification
Model	20F1ANC140JA0NNNNN
Series	PowerFlex 753
Voltage	480 V class
Current	Approx. 140 A class
Drive Type	AC Variable Frequency Drive
Application	Medium/high-power machinery
Typical Loads	Pumps, fans, conveyors, process machines
Installation	Panel / Cabinet
Approx. Dimensions	Approx. 880 × 430 × 350 mm class
Approx. Weight	Approx. 73–109 kg

This model sits considerably below the 500 A-class PowerFlex 755 in terms of power capacity.

It can be a more practical choice when the motor is substantially smaller and the electrical system uses a 480 V class supply.

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35. 20G11TF460JN0NNNNN

Parameter	Specification
Model	20G11TF460JN0NNNNN
Series	PowerFlex 755
Voltage	690 V
Current Class	460 A
LD Power	Approx. 500 kW
ND Power	Approx. 450 kW
HD Power	Approx. 375 kW
Frame	8
Cooling	Forced Air
Filtering	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
HIM	None
Approx. Dimensions	2145 × 778 × 425 mm
Approx. Weight	Approx. 286 kg

This is one of the closest lower-capacity alternatives to the 20G11TF500JN0NNNNN.

For a motor that does not require the full 500 A-class capacity, it can be a logical model to compare.

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36. Direct Capacity Comparison

Model	Voltage	LD Power	ND Power	HD Power	Frame
20G11TF265JN0NNNNN	690 V	315 kW	250 kW	200 kW	8
20G11TF330JN0NNNNN	690 V	355 kW	315 kW	250 kW	8
20G11TF370JN0NNNNN	690 V	400 kW	355 kW	300 kW	8
20G11TF415JN0NNNNN	690 V	450 kW	400 kW	355 kW	8
20G11TF460JN0NNNNN	690 V	500 kW	450 kW	375 kW	8
20G11TF500JN0NNNNN	690 V	530 kW	500 kW	400 kW	8

The 20G11TF500JN0NNNNN provides the highest capacity in this particular Frame 8 group.

The difference between the 460 and 500 configurations may look relatively small on paper, but it can be important when the motor current is close to the drive limit.

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37. Selection Guide

Requirement	Recommended Direction
Up to approximately 200 kW Heavy Duty	20G11TF265JN0NNNNN class
Up to approximately 250 kW Heavy Duty	20G11TF330JN0NNNNN class
Up to approximately 300 kW Heavy Duty	20G11TF370JN0NNNNN class
Up to approximately 355 kW Heavy Duty	20G11TF415JN0NNNNN class
Up to approximately 375 kW Heavy Duty	20G11TF460JN0NNNNN class
Up to approximately 400 kW Heavy Duty	20G11TF500JN0NNNNN class
Above approximately 400 kW Heavy Duty	Consider larger-frame configurations

This is a preliminary selection guide rather than a substitute for a complete motor and load calculation.

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38. Selection by Application

Application	Key Requirement	Suitable Direction
Large Pump	Variable torque and motor current	20G11TF460/500
Large Fan	Variable torque and speed control	20G11TF460/500
Large Blower	High continuous power	20G11TF460/500
Heavy Conveyor	Starting torque and overload	20G11TF460/500
Crusher	Heavy Duty operation	20G11TF500 class
Large Mill	Torque and inertia	20G11TF460/500
Mining Equipment	Power, torque and environment	20G11TF460/500+
Cement Equipment	Continuous industrial operation	20G11TF415/460/500
Medium Machinery	Lower motor current	PowerFlex 753
Small Machinery	Compact installation	PowerFlex 525

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39. Advantages for Energy Efficiency

The drive can provide energy-saving opportunities when the process load is suitable for variable-speed operation.

This is especially relevant to centrifugal pumps and fans.

If the process requires less flow or airflow, the motor speed can potentially be reduced.

This is different from keeping the motor at full speed and using mechanical restriction to reduce process output.

The actual energy benefit depends on the complete system.

Factors include:

• Motor efficiency
• Pump or fan characteristics
• Process demand
• Operating hours
• System resistance
• Control method
• Mechanical transmission efficiency

For that reason, energy performance should be evaluated using the actual application rather than a fixed percentage assumption.

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40. Advantages for Equipment Life

Smooth acceleration and deceleration can reduce mechanical shock.

For large equipment, even a small reduction in mechanical shock can be useful because the machine may contain expensive components such as:

• Gearboxes
• Couplings
• Shafts
• Bearings
• Conveyor belts
• Pump assemblies
• Fan assemblies

The drive does not eliminate mechanical wear, but appropriate control settings can make the machine’s operating cycle smoother.

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41. Advantages for Process Flexibility

The drive can allow production equipment to operate at different speeds.

For example:

Operating Condition	Possible Drive Function
Startup	Low-speed controlled acceleration
Normal Production	Stable operating speed
High Production	Increased speed
Reduced Demand	Reduced speed
Cleaning	Low-speed operation
Maintenance	Controlled jog / low-speed operation

The exact functions available depend on the overall control system and application programming.

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42. Automation and Control

The embedded EtherNet/IP capability is useful for installations where the drive is connected directly to the plant automation network.

The drive can be incorporated into a control architecture containing:

• PLC
• HMI
• Supervisory control
• Remote I/O
• Industrial Ethernet
• Motor-control equipment

This can reduce the need for separate hardwired signals for every operating parameter.

The drive can exchange commands and status information with the control system.

This is particularly useful when multiple large drives operate as part of one production process.

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43. Maintenance and Reliability

Because the 20G11TF500JN0NNNNN is a large industrial drive, maintenance planning should be treated as part of the overall plant-maintenance strategy.

The cooling system deserves particular attention.

Dust accumulation can reduce airflow.

Reduced airflow can increase operating temperature.

Higher temperature can increase thermal stress on electronic components.

A clean and properly ventilated installation is therefore important.

The power connections should also be inspected according to the plant’s maintenance procedures.

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44. Installation Checklist

Item	Recommended Check
Supply Voltage	Confirm 690 V AC system
Phase	Confirm three-phase supply
Motor Current	Compare with drive duty rating
Motor Power	Confirm required kW
Duty Classification	LD / ND / HD
Starting Torque	Confirm mechanical requirement
Overload	Confirm required overload level
Acceleration	Determine required ramp
Deceleration	Determine required ramp
Cooling	Confirm adequate airflow
Cabinet	Confirm physical space
Floor Loading	Allow for approximately 286 kg
Cable Routing	Confirm sufficient space
Network	Confirm EtherNet/IP architecture
CM Configuration	Confirm J configuration
HIM	Confirm whether local interface is required
Maintenance	Provide service access

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45. Important Points When Replacing an Existing Drive

When replacing an existing 20G11TF500JN0NNNNN, do not compare only the current rating.

The following should be checked:

1. Complete catalog number.
2. Voltage class.
3. Motor nameplate current.
4. Motor power.
5. Duty classification.
6. Filtering configuration.
7. Common-mode capacitor jumper configuration.
8. Input configuration.
9. DC terminal requirements.
10. Communication requirements.
11. Cabinet dimensions.
12. Cooling arrangement.
13. Motor cable arrangement.
14. Control-system compatibility.
15. Mechanical installation requirements.

The complete catalog number is especially important because two models with similar current ratings can have different configurations.

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46. Overall Technical Advantages

The main advantages of the 20G11TF500JN0NNNNN can be summarized as follows.

Advantage	Description
High Power	Approximately 530 kW LD / 500 kW ND
High Current	500 A class
690 V Operation	Suitable for large industrial motor systems
Variable Speed	Motor speed can be adjusted
Controlled Acceleration	Reduces sudden starting stress
Controlled Deceleration	Provides controlled stopping
Heavy-Duty Capability	Approximately 400 kW HD
Network Integration	Embedded EtherNet/IP
Large Industrial Application	Suitable for several-hundred-kilowatt motors
Flexible Process Control	Speed can follow process demand
Air Cooling	Suitable for large industrial installations
Frame 8 Construction	Designed for high-power applications
Filtered Configuration	Supports specified electrical/EMC arrangements
CM Jumper Installed	J configuration

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47. Final Technical Summary

Category	Specification
Model	20G11TF500JN0NNNNN
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Type	High-Power AC Drive
Voltage	690 V AC
Phase	3 Phase
Current	500 A class
LD Current	Approx. 530 A
ND Current	Approx. 500 A
HD Current	Approx. 413 A
LD Power	Approx. 530 kW
ND Power	Approx. 500 kW
HD Power	Approx. 400 kW
Input	AC with Precharge
DC Terminals	Yes
Cooling	Forced Air
Frame	8
Enclosure	Open Type
Filtering	Filtered
CM Jumper	Installed
Communication	Embedded EtherNet/IP
HIM	None
Height	Approx. 2145 mm
Width	Approx. 778 mm
Depth	Approx. 425 mm
Weight	Approx. 286 kg
Main Applications	Pumps, fans, blowers, conveyors, crushers, mills, mining, cement and process machinery

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48. Final Evaluation

The 20G11TF500JN0NNNNN is a high-power PowerFlex 755 AC variable frequency drive intended for large industrial motors.

Its 690 V three-phase input, 500 A class current capability, approximately 530 kW Light-Duty rating, 500 kW Normal-Duty rating and 400 kW Heavy-Duty rating make it suitable for a broad range of large industrial machines.

The product is particularly well matched to applications where motor speed needs to follow the process rather than remain fixed.

Large pumps and fans can benefit from adjustable-speed operation.

Large conveyors can benefit from controlled acceleration.

Crushers and mills can benefit from high-power motor control and appropriate overload capability.

Mining, cement and steel-processing systems can benefit from integrating the drive into a larger automation architecture.

Another important feature is the J configuration, which means the common-mode capacitor jumper is installed.

This detail should be preserved when the drive is being selected as a replacement.

The physical size is also a major consideration.

With an approximate 2145 mm height, 778 mm width, 425 mm depth and 286 kg weight, this is not a compact machine-mounted inverter.

It is a large industrial electrical component that requires appropriate cabinet planning, ventilation, floor support, lifting arrangements and maintenance access.

For applications requiring slightly less capacity, the 20G11TF460JN0NNNNN is one of the closest related choices.

For lower-power motors, the 20G11TF415JN0NNNNN, 20G11TF370JN0NNNNN, 20G11TF330JN0NNNNN and 20G11TF265JN0NNNNN provide progressively smaller capacity options.

When the motor requirement exceeds the 500 A Frame 8 range, larger Frame 9 configurations should be considered.

From a practical engineering perspective, the most important selection factors are not simply the nominal kW rating.

The motor nameplate current, load torque, starting requirements, overload profile, acceleration time, operating cycle, voltage, environmental conditions and installation configuration all need to be considered together.

For a large 690 V industrial motor where adjustable speed, controlled starting, process integration and several-hundred-kilowatt power capability are required, the 20G11TF500JN0NNNNN is a strong high-power drive configuration within the PowerFlex 755 family.