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Allen-Bradley 20G1ANC456JN0NNNNN PowerFlex 755 AC Drive — Detailed Product Information, Specifications, Applications and Related Models

The 20G1ANC456JN0NNNNN is a high-capacity AC variable frequency drive in the PowerFlex 755 series. It is designed for large three-phase AC motors and is intended for industrial applications where high output current, adjustable motor speed, controlled acceleration and deceleration, network communication and flexible motor-control functions are required.

This model is a 400 VAC, three-phase, 456 A, 250 kW Normal Duty / 200 kW Heavy Duty, Frame 7 air-cooled drive. It uses an open industrial construction with IP20/IP00 protection, includes an EMC filtering arrangement and common-mode capacitor jumper configuration, and provides embedded EtherNet/IP communication.

One important point about this particular catalog number is that the 20G1ANC456JN0NNNNN does not have a dynamic-braking transistor. This distinguishes it from some closely related PowerFlex 755 configurations that use a different catalog-number option for braking.

The model also does not include a standard HIM operator module in this configuration. The drive is therefore particularly suited to installations where operation, monitoring and parameter management are handled through the automation system or through an appropriate external interface.

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1. Basic Product Information

The 456 A output rating is the most important electrical characteristic of this model.

With a Normal Duty rating of approximately 250 kW, it is intended for large industrial motors. Its Heavy Duty rating is approximately 200 kW, so applications with frequent overloads, high starting torque or demanding acceleration should be evaluated using the Heavy Duty rating rather than the Normal Duty rating.

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2. Brand and Product Series

The requested model belongs to the Allen-Bradley PowerFlex 755 series.

The PowerFlex 755 is a high-performance industrial AC drive family intended for applications where the drive needs to provide considerably more than basic motor speed adjustment.

The architecture is designed for large automated machinery and can support communication, feedback, additional I/O, safety-related functions and other application-specific options.

The 20G1ANC456JN0NNNNN is therefore suitable for applications where the drive is an important part of the machine-control system.

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3. Detailed Electrical Parameters

The distinction between 250 kW Normal Duty and 200 kW Heavy Duty is particularly important.

Normal Duty applications generally have less demanding overload characteristics, while Heavy Duty applications can involve higher torque requirements and more severe overload conditions.

For this reason, a 200 kW motor does not automatically mean that every 200 kW application should use this drive. The actual motor current and load profile should be checked before selection.

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4. Dimensions and Weight

The 20G1ANC456JN0NNNNN uses the large Frame 7 construction.

The approximately 82 kg weight should be considered when designing the mounting structure and handling equipment.

This is a large industrial drive, so cabinet space should not be calculated using only the external dimensions.

Additional room is normally needed for:

• Power cables
• Control cables
• Network cables
• Grounding
• Air circulation
• Maintenance
• Heat dissipation
• Connection access

The actual cabinet dimensions will therefore normally be larger than the physical dimensions of the drive itself.

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5. Product Introduction

The 20G1ANC456JN0NNNNN is designed to control large AC motors by converting fixed-frequency incoming AC power into a controlled variable-frequency output.

This allows the motor to operate at different speeds according to the requirements of the machine.

For example, a large pump does not necessarily need to operate at full speed all the time. A conveyor may need different speeds during different stages of production. A large fan may need to adjust airflow according to process requirements.

A variable frequency drive provides the ability to make these adjustments electronically.

For large industrial equipment, this can provide better process control than simply starting and stopping the motor.

The PowerFlex 755 platform also provides a range of control and communication capabilities that allow the drive to operate as part of an industrial automation system.

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6. Main Characteristics of the 20G1ANC456JN0NNNNN

The main characteristics of this particular configuration can be summarized as follows:

456 A output capacity

The drive is designed for large motors and high-current applications.

250 kW Normal Duty

This places the drive firmly in the large industrial-drive category.

200 kW Heavy Duty

This rating is important for applications involving more demanding load conditions.

400 VAC three-phase

The drive is intended for industrial three-phase systems in the 400 V class.

Frame 7

The large frame provides the physical and thermal structure required for the drive’s high power rating.

Forced-air cooling

High-power semiconductor devices generate considerable heat, so forced-air cooling is used to remove heat during operation.

Embedded EtherNet/IP

The drive can communicate with an industrial automation system over the integrated network interface.

EMC filtering

The configuration includes filtering intended to help control electromagnetic interference.

No dynamic-braking transistor

Unlike some related catalog configurations, this particular model does not include the dynamic-braking transistor.

No standard HIM

The catalog configuration is supplied without a standard Human Interface Module.

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7. Product Applications

7.1 Large Pumps

Large industrial pumps are one of the main application areas for high-power variable frequency drives.

Possible applications include:

• Water treatment
• Wastewater treatment
• Cooling-water systems
• Industrial circulation
• Process pumping
• Large transfer pumps
• Irrigation
• Chemical process systems
• Industrial fluid transportation

The drive allows the pump motor speed to be adjusted according to process requirements.

For variable-torque pump applications, speed adjustment can also provide a way of reducing unnecessary motor operation at full speed.

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8. Industrial Fans and Blowers

Large fans can consume considerable electrical power, especially when operated continuously at full speed.

The 20G1ANC456JN0NNNNN can be used to control large fan motors where variable airflow is required.

Typical applications include:

• Industrial ventilation
• Furnace fans
• Exhaust systems
• Cooling systems
• Dust collection
• Process ventilation
• Large air-handling equipment
• Combustion-air systems

The drive can change motor speed according to the required airflow.

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9. Conveyor Systems

Large conveyors often require controlled acceleration and deceleration.

Starting a large conveyor motor directly can create substantial mechanical and electrical stress.

A variable frequency drive can provide a more gradual acceleration profile.

Typical applications include:

• Mining conveyors
• Bulk-material conveyors
• Aggregate handling
• Cement plants
• Steel plants
• Manufacturing lines
• Warehouse material handling
• Transfer conveyors

The 456 A capacity makes this model suitable for large conveyor motors when the motor and load fall within the applicable drive rating.

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10. Compressors

Large compressors can require high motor current and substantial starting torque.

The drive can provide controlled motor acceleration and adjustable operating speed.

Possible applications include:

• Industrial air compressors
• Process compressors
• Large refrigeration equipment
• Gas-processing machinery
• Industrial compression systems

Compressor applications should be evaluated carefully because the required torque and speed characteristics depend heavily on the compressor design.

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11. Extruders

Large extrusion systems can benefit from accurate and adjustable motor-speed control.

The drive can be used where the extrusion process requires:

• Stable motor speed
• Controlled acceleration
• Adjustable production speed
• Controlled torque
• Integration with a production-control system

The appropriate control mode should be selected according to the motor and mechanical characteristics of the extruder.

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12. Mixers and Agitators

Large industrial mixers can place high torque demands on the motor.

The load can also change substantially as the material inside the mixer changes.

A high-capacity drive can provide controlled acceleration and adjustable speed.

Potential applications include:

• Chemical mixing
• Industrial blending
• Food processing
• Slurry processing
• Material preparation
• Bulk-material mixing

For high starting torque applications, the Heavy Duty rating should be considered carefully.

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13. Material Handling Equipment

The drive can also be applied to large material-handling machinery.

Examples include:

• Feeders
• Transfer systems
• Elevators
• Large conveyors
• Processing equipment
• Bulk-material handling systems

The ability to integrate the drive with a plant automation network can be particularly useful in these applications.

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14. Advantages of the 20G1ANC456JN0NNNNN

14.1 High Current Capacity

The 456 A rating gives this model substantial output capacity.

This makes it suitable for large motors that cannot be handled by compact variable frequency drives.

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14.2 250 kW Normal Duty Rating

The 250 kW Normal Duty rating allows the drive to serve large industrial motors.

It is particularly useful in high-capacity pumping, fan, conveyor and process applications.

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14.3 200 kW Heavy Duty Rating

The Heavy Duty rating provides a clear basis for applications where higher load demand needs to be considered.

The user should select the duty rating according to the actual machine load rather than simply matching the motor’s nominal kW.

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14.4 Embedded EtherNet/IP

The integrated network interface is useful for automated production systems.

The drive can exchange control and diagnostic information with the plant automation system.

Typical information can include:

• Run command
• Stop command
• Speed reference
• Actual speed
• Current
• Frequency
• Fault status
• Warning status
• Drive status
• Diagnostic information

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14.5 Modular PowerFlex 755 Architecture

The PowerFlex 755 family is designed around a modular architecture.

Depending on the system requirements, suitable options can provide additional I/O, feedback, communication and safety-related functions.

This allows the drive platform to be adapted to different machines.

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14.6 Forced-Air Cooling

The forced-air cooling arrangement is appropriate for a high-power industrial drive.

Proper airflow helps remove heat generated by the power semiconductor section.

This is particularly important for a 250 kW-class drive.

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14.7 Integrated EMC Filtering

The filtering configuration can help control high-frequency electrical noise generated by the drive’s switching operation.

This is useful in industrial facilities containing other electronic control equipment.

Correct grounding and cable installation are still necessary.

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14.8 Compactness Relative to Power

Although this is a large drive, its Frame 7 construction provides a relatively organized package for a drive capable of handling approximately 250 kW Normal Duty.

This can simplify cabinet planning compared with assembling multiple smaller drives for one large motor.

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15. Important Difference: No Dynamic-Braking Transistor

One of the most important characteristics of the 20G1ANC456JN0NNNNN is that the catalog configuration does not include a dynamic-braking transistor.

This should not be confused with other PowerFlex 755 catalog numbers that have a braking transistor.

If the application requires dynamic braking, the exact drive configuration must be checked before purchase.

This is particularly important for:

• High-inertia loads
• Rapid stopping
• Large conveyors
• Certain hoisting systems
• Centrifuges
• High-speed rotating equipment

If the machine needs braking energy to be dissipated through a braking resistor, the drive configuration and complete braking arrangement must be selected accordingly.

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16. Communication and Automation

The embedded EtherNet/IP interface allows the drive to become part of a larger control system.

A typical architecture can be represented as:

Industrial Controller → EtherNet/IP → PowerFlex 755 → Large AC Motor → Mechanical Load

The controller can provide speed references and commands while receiving operating information from the drive.

This type of arrangement is useful in centralized production systems.

It can also simplify troubleshooting because operating information can be monitored from the automation system rather than relying entirely on local indicators.

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17. Typical Control Functions

Depending on the overall configuration, the PowerFlex 755 platform can provide functions such as:

• Speed control
• Frequency control
• Torque-related control
• PID control
• Acceleration control
• Deceleration control
• Motor overload protection
• Fault monitoring
• Diagnostic monitoring
• Network control
• Feedback-based control

The actual functions available in a machine depend on the selected options, software configuration and motor-control setup.

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18. Environmental Characteristics

The actual installation environment should be evaluated before commissioning.

Temperature, altitude, humidity, dust and ventilation can all influence the operating performance of a large variable frequency drive.

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19. Recommended Cabinet Arrangement

Because the drive is approximately 881.5 mm high, 430 mm wide and 349.6 mm deep, the cabinet should be designed with additional working space.

A typical cabinet design should provide room for:

• Incoming power protection
• Drive input wiring
• Motor output wiring
• Control wiring
• Network connections
• Grounding
• Cooling airflow
• Maintenance access
• Cable bending radius

The drive should not be mounted directly against other heat-generating components without considering the total cabinet thermal load.

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20. Installation Considerations

Before installation, the following items should be checked.

Power Supply

The incoming three-phase supply should match the drive’s voltage requirements.

Motor

The motor nameplate voltage and current should be checked against the drive configuration.

Duty

The application should be evaluated as Normal Duty or Heavy Duty.

Motor Cable

The motor cable should be suitable for variable-frequency-drive operation.

Grounding

Proper grounding is essential for both safety and electromagnetic performance.

Ventilation

The cooling-air path must remain unobstructed.

Network

If EtherNet/IP is used, the network configuration and addressing should be planned before commissioning.

Braking

Because this model does not contain the dynamic-braking transistor, applications requiring dynamic braking need additional consideration.

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21. Five Recommended Models From the Same Series or Closely Related Models

The following models are useful for comparison when selecting another PowerFlex 755 configuration.

20G1ANC367JN0NNNNN

This model is one step below the 456 A configuration in output-current capacity.

It is suitable when the motor requirement is closer to the 200 kW range and the application does not require the full 456 A capacity.

Its Frame 7 construction means that the physical size is broadly similar to the 456 A model.

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20G1ANC302JN0NNNNN

The 302 A model provides a lower-current option within the same family.

It is useful for applications around the 160 kW Normal Duty range.

Because it uses the same general large-frame architecture, it can be considered when the application requires PowerFlex 755 functions but does not require 456 A.

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20G1ANC260JN0NNNNN

The 260 A model moves into a smaller Frame 6 configuration.

Its approximately 132 kW Normal Duty capacity makes it appropriate for a lower-power motor.

Its smaller dimensions and lower weight can also make cabinet installation easier.

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20G1ANC477JN0NNNNN

The 477 A configuration represents another high-current PowerFlex 755 option.

It can be considered for applications requiring output capacity beyond the 456 A class.

Because current and motor power ratings can vary according to voltage and duty classification, the exact motor nameplate should be checked before using this model as an alternative.

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22. Five Popular Models From the Same Brand

The following models cover different size ranges within the same brand and can be considered for different applications.

These five models cover a very wide range of motor sizes.

The PowerFlex 525 models are compact and are intended for smaller machinery.

The PowerFlex 753 model is aimed at industrial applications requiring a more expandable drive architecture.

The PowerFlex 755 models are intended for considerably larger motors and higher-power machinery.

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23. Model Comparison

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24. Why the 20G1ANC456JN0NNNNN Is Used for Large Machinery

The model combines a high current rating with a large motor-power capacity.

The 456 A output rating provides enough capacity for large industrial motors.

The 250 kW Normal Duty rating makes it suitable for high-capacity equipment.

The 200 kW Heavy Duty rating provides a reference for applications where more demanding loading conditions need to be considered.

The Frame 7 construction provides the physical structure necessary for the high-power components.

The integrated communication capability allows the drive to work with an automation system.

These characteristics make it suitable for machinery where the drive is not simply a speed controller but a central part of the motor-control system.

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25. Maintenance Considerations

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

Important inspection items include:

• Cooling fan operation
• Ventilation openings
• Cabinet temperature
• Dust accumulation
• Power connections
• Ground connections
• Motor cables
• Communication cables
• Drive fault history
• Motor current
• Drive operating temperature
• Network status
• Braking requirements

Because the 20G1ANC456JN0NNNNN does not include a dynamic-braking transistor, any application requiring dynamic braking should be checked separately.

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26. Product Advantages in Practical Applications

For Pumps

The drive can provide adjustable pump speed, allowing the pumping system to respond to changing process requirements.

For Fans

The drive can adjust fan speed rather than requiring the fan to operate continuously at maximum speed.

For Conveyors

The drive can provide controlled acceleration and deceleration, reducing sudden mechanical loading.

For Compressors

The drive can provide controlled starting and adjustable operating speed.

For Mixers

The drive can provide controlled starting and adjustable speed for different production conditions.

For Large Production Lines

EtherNet/IP communication allows the drive to become part of a larger automation system.

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27. Product Selection Checklist

Before selecting this model for a machine, the following information should be confirmed.

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28. Final Technical Summary

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29. Conclusion

The 20G1ANC456JN0NNNNN is a high-capacity PowerFlex 755 AC variable frequency drive designed for large three-phase AC motor applications.

Its most important specifications are the 400 VAC three-phase input class, 456 A output current, 250 kW Normal Duty rating and 200 kW Heavy Duty rating.

The drive uses a Frame 7, forced-air-cooled construction, with approximate dimensions of 881.5 × 430 × 349.6 mm and an approximate weight of 82 kg.

The embedded EtherNet/IP interface makes it suitable for integration into industrial automation systems, while the modular architecture provides flexibility for applications requiring additional control, feedback, I/O or safety functions.

The model is particularly suitable for large pumps, fans, conveyors, compressors, mixers, extruders and other high-power industrial machines.

A particularly important feature of this exact catalog number is the absence of a dynamic-braking transistor. Applications requiring dynamic braking should therefore be reviewed carefully before selecting this configuration.

For applications with lower power requirements, models such as 20G1ANC367JN0NNNNN, 20G1ANC302JN0NNNNN and 20G1ANC260JN0NNNNN provide progressively lower current and power capacities within the same general PowerFlex 755 family.

For smaller equipment, a compact PowerFlex 525 configuration may be more appropriate because it occupies considerably less cabinet space and is intended for much lower motor power.

From an engineering perspective, the most important point is to select the drive according to motor current, motor voltage, duty cycle, overload requirement, torque characteristics, acceleration and deceleration requirements, braking requirements and environmental conditions, rather than selecting solely from the motor’s kW rating.

The 20G1ANC456JN0NNNNN is therefore best regarded as a large industrial drive for high-power AC motor control, particularly where substantial current capacity, adjustable speed, industrial communication and integration with a larger automation system are required.