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Allen-Bradley 20G1AJD740AN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1AJD740AN0NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for large industrial motor-control applications.

It belongs to the PowerFlex 755 series and represents one of the highest-current configurations within the 480 VAC, three-phase, Frame 8 air-cooled packaged-drive range.

The drive is rated in the 740 A class and is intended for large motors and heavy industrial machinery where high current capacity, variable-speed control, industrial enclosure protection, and integration with an automation network are required.

The 20G1AJD740AN0NNNNN is configured for 480 VAC, three-phase operation, with a 700 HP light-duty rating, 650 HP normal-duty rating, and 500 HP heavy-duty rating.

This combination makes the drive particularly suitable for large pumps, fans, blowers, conveyors, process equipment, mining machinery, cement equipment, water-treatment systems, and other high-power industrial machinery.

The drive uses an air-cooled design and is built around a Frame 8 platform.

It uses an IP54 / NEMA Type 12, 800 mm deep MCC-style packaged configuration, providing a substantial enclosure arrangement intended for industrial electrical installations.

The drive also includes embedded EtherNet/IP communication, allowing it to be integrated into an industrial Ethernet control architecture.

The catalog number specifies an AC input with precharge and no DC terminals, a filtered configuration, CM jumper removed, no internal dynamic braking transistor, and a blank/no-HIM configuration.

The blank-HIM configuration is an important distinction from related N4 models. The N0 designation is intended for installations where the drive does not require the enhanced LCD full numeric HIM as part of the standard configuration.

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2. Brand and Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	High-Power AC Variable Frequency Drive
Product Configuration	PowerFlex 755 AC Packaged Drive
Cooling Method	Air Cooled
Frame Size	Frame 8
Voltage Class	480 VAC
Phase	Three Phase
Current Class	740 A
Enclosure	NEMA Type 12
Ingress Protection	IP54
Mounting / Construction	800 mm Deep MCC Style
Communication	Embedded EtherNet/IP
HIM Configuration	Blank / No HIM
Input	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Removed
Dynamic Braking	No Internal Dynamic Braking Transistor
Primary Function	Large Motor Speed and Torque Control

The PowerFlex 755 series is positioned for applications requiring considerably more capability than compact machine-oriented drives.

The 20G1AJD740AN0NNNNN is particularly appropriate when the motor current is high enough that smaller-frame drives are no longer practical.

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3. Detailed Technical Parameters

Parameter	20G1AJD740AN0NNNNN
Catalog Number	20G1AJD740AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Product Style	AC Packaged Drive
Input Voltage	480 VAC
Input Phase	3 Phase
Current Class	740 A
Light-Duty Continuous Current	800 A
Light-Duty 1-Minute Current	880 A
Light-Duty Horsepower	700 HP
Normal-Duty Continuous Current	740 A
Normal-Duty 1-Minute Current	817 A
Normal-Duty 3-Second Current	1110 A
Normal-Duty Horsepower	650 HP
Heavy-Duty Continuous Current	617 A
Heavy-Duty 1-Minute Current	926 A
Heavy-Duty 3-Second Current	1110 A
Heavy-Duty Horsepower	500 HP
Frame	Frame 8
Cooling	Air Cooled
Enclosure Type	NEMA Type 12
Ingress Protection	IP54
Cabinet / Construction Style	800 mm Deep MCC Style
Input Type	AC Input with Precharge
DC Terminals	No DC Terminals
Filtering	Filtered
CM Jumper	Removed
Dynamic Braking	None / No Internal Dynamic Braking Transistor
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM
Local Display	Not included in standard N0 configuration
Typical Motor Class	Large Industrial Motors
Light-Duty Application Capacity	Up to approximately 700 HP
Normal-Duty Application Capacity	Up to approximately 650 HP
Heavy-Duty Application Capacity	Up to approximately 500 HP
Approximate Dimensions	2477 × 600 × 800 mm
Approximate Weight	644 kg
Installation Type	Industrial Electrical / MCC Installation
Main Application	High-Power Variable-Speed Motor Control

The 740 A rating is the most important electrical characteristic of this model.

The drive is not limited to a single horsepower figure. Its usable motor capacity changes according to the operating duty.

Under the stated ratings, the drive can be considered for motors up to approximately 700 HP in light-duty operation, 650 HP in normal-duty operation, and 500 HP in heavy-duty operation.

The distinction between these ratings is important because motor selection should be based on actual motor full-load current and application duty rather than horsepower alone.

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4. Understanding the Catalog Number

The catalog number 20G1AJD740AN0NNNNN identifies a specific PowerFlex 755 configuration.

Catalog Number Portion	General Identification
20G	PowerFlex 755 family
1	Product configuration
A	Air-cooled configuration
J	Packaged-drive configuration
D	480 VAC class configuration
740	740 A current class
A	CM jumper removed
N0	Blank / No HIM configuration
NNNNN	Additional configuration positions

The 740 section is the key rating identifier.

The A configuration in the relevant position indicates that the CM jumper is removed.

The N0 configuration indicates a blank/no-HIM arrangement.

This is significant when comparing the model with the related 20G1AJD740AN4NNNNN, which uses an enhanced LCD full numeric HIM configuration.

For replacement work, these catalog-number differences should be checked carefully rather than treating all 740 A PowerFlex 755 drives as identical.

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5. Product Introduction

The PowerFlex 755 architecture is designed for large industrial motor-control systems in which the drive must do considerably more than simply start and stop a motor.

The 20G1AJD740AN0NNNNN provides variable-frequency motor control for large electrical machines and can be integrated into an industrial automation network through its embedded EtherNet/IP capability.

The drive’s large current capacity makes it suitable for equipment where motor power can reach several hundred horsepower.

This makes it particularly valuable in applications such as large pumping stations, high-capacity ventilation systems, heavy conveyors, mining equipment, cement processing, water infrastructure, and large process machinery.

The Frame 8 design provides the physical and thermal platform needed to accommodate the high-current power section.

The 800 mm deep MCC-style arrangement also makes the product more suitable for centralized electrical installations than for compact machine panels.

The IP54 / NEMA Type 12 enclosure configuration provides additional protection against common indoor industrial contaminants and allows the drive to be integrated into an industrial electrical-room environment.

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6. 740 A High-Current Capability

The primary feature of the 20G1AJD740AN0NNNNN is its 740 A current class.

This is a substantial current rating intended for very large motors.

For engineering selection, three duty categories are particularly important.

Light Duty

The light-duty rating is approximately 800 A continuous, with a light-duty motor capacity of approximately 700 HP.

This rating is suitable for applications where the motor operates under comparatively moderate overload conditions.

Large fans and some pumping systems can fall into this type of application, provided the actual motor current and load profile are within the applicable drive rating.

Normal Duty

The normal-duty rating is approximately 740 A continuous, with a normal-duty motor capacity of approximately 650 HP.

Normal-duty operation is commonly relevant to general industrial motor applications where the motor experiences ordinary operating variations and controlled acceleration.

Heavy Duty

The heavy-duty rating is approximately 617 A continuous, with a heavy-duty motor capacity of approximately 500 HP.

Heavy-duty operation should be considered where the application has higher starting torque, greater acceleration requirements, repeated overloads, or other demanding mechanical characteristics.

The lower horsepower rating under heavy-duty conditions does not indicate a weaker drive.

Instead, it reflects the additional current margin required to handle demanding load conditions.

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7. 480 VAC Three-Phase Operation

The 20G1AJD740AN0NNNNN is designed for 480 VAC three-phase industrial power systems.

Three-phase 480 VAC distribution is commonly used for large industrial motors because it allows substantial motor power to be delivered while keeping current within practical electrical distribution limits.

The drive receives AC input power and produces controlled variable-frequency output for the motor.

By controlling the output frequency and voltage according to the selected motor-control strategy, the drive can regulate motor speed and torque.

This provides significantly more flexibility than a conventional fixed-speed motor starter.

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8. AC Input with Precharge

The drive uses an AC input with precharge arrangement.

Precharge is important in large power-conversion systems because the DC bus contains substantial capacitive energy storage.

The precharge process limits the initial charging current of the DC-link capacitors when the drive is energized.

For a drive of this size, controlled charging is particularly important because uncontrolled capacitor charging could produce extremely high inrush current.

The AC-input configuration also means that the drive should be treated as a packaged AC-input drive rather than as a configuration intended for direct DC-bus interconnection.

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9. No DC Terminals

The stated configuration does not provide DC input terminals.

This is an important point for system designers considering common DC-bus architectures.

If a project requires multiple drives to share a DC bus or requires a particular regenerative architecture, the exact drive configuration must be evaluated separately.

The 20G1AJD740AN0NNNNN is fundamentally configured as an AC-input PowerFlex 755 packaged drive.

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10. Embedded EtherNet/IP

Embedded EtherNet/IP is a major advantage of this drive.

For large industrial equipment, communication with the main control system is often just as important as the drive’s power rating.

The drive can be incorporated into an Ethernet-based automation architecture, allowing the control system to exchange drive operating information and commands.

Typical information may include:

• Start command.
• Stop command.
• Speed reference.
• Frequency reference.
• Run status.
• Ready status.
• Fault status.
• Alarm status.
• Motor current.
• Motor speed.
• Drive status.
• Diagnostic information.
• Parameter information.

This network capability is especially valuable in plants containing multiple high-power drives.

Instead of operating each drive as an isolated controller, the drives can be integrated into the plant’s overall automation system.

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11. Blank / No HIM Configuration

The N0 configuration indicates a blank/no-HIM arrangement.

This means the standard configuration does not include the enhanced LCD full numeric HIM associated with N4 configurations.

This configuration can be attractive for installations where drive operation and commissioning are primarily handled through the control system, engineering software, or another external interface.

It can also be appropriate when the drive is installed in a centralized electrical room where routine local operator interaction is not required.

However, for applications where technicians frequently need direct local access to parameters and diagnostics, a related N4 configuration may be preferable.

The difference should therefore be evaluated according to the actual maintenance strategy.

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12. Filtered Configuration

The 20G1AJD740AN0NNNNN is specified in a filtered configuration.

Variable-frequency drives use high-speed semiconductor switching to synthesize the motor output waveform.

This switching behavior naturally produces high-frequency electrical components.

Filtering helps address electromagnetic compatibility requirements and can reduce unwanted high-frequency interaction with other electrical equipment.

For large installations, filtering should be considered together with:

• Grounding.
• Bonding.
• Motor cable construction.
• Cable length.
• Shielding.
• Cabinet arrangement.
• Control wiring.
• Communication wiring.
• Installation topology.

A filter alone should not be treated as a complete EMC solution.

The complete installation must be engineered as an electrical system.

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13. CM Jumper Removed

This model uses the CM jumper removed configuration.

The common-mode configuration affects the relationship between the drive’s internal electrical system and the grounding environment.

This can be important in industrial installations where motor cable lengths are long or where multiple drives and other power electronics share the same electrical infrastructure.

Grounding and bonding should therefore be designed consistently with the selected CM configuration.

When replacing a drive, the CM jumper configuration should be checked because a replacement with a different configuration may not be electrically equivalent in the installation.

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14. Dynamic Braking

The 20G1AJD740AN0NNNNN configuration does not include an internal dynamic braking transistor.

This is important for applications requiring rapid deceleration.

When a motor decelerates, mechanical energy is transferred back through the motor and can appear as regenerative energy on the drive’s DC bus.

If the deceleration is sufficiently rapid and the load has substantial inertia, the resulting energy must be managed appropriately.

Applications that may require special braking consideration include:

• Large conveyors.
• High-inertia fans.
• Centrifugal machines.
• Large rotating equipment.
• Certain process machines.
• Applications with frequent start-stop cycles.

The absence of an internal dynamic braking transistor does not prevent the drive from being used in such applications, but the complete braking architecture must be evaluated separately.

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15. Air-Cooled Architecture

The drive uses an air-cooled design.

For a 740 A-class drive, thermal management is a major part of the installation.

Large semiconductor power sections generate considerable heat during operation.

The cooling system must therefore have adequate airflow, and the surrounding electrical environment must be designed so that the heat generated by the drive can be removed effectively.

Installation planning should consider:

• Ambient temperature.
• Ventilation.
• Airflow.
• Cabinet arrangement.
• Electrical-room temperature.
• Dust loading.
• Filter maintenance.
• Heat rejection.
• Required service clearance.

The air-cooled design is practical for many industrial installations and avoids the additional infrastructure associated with liquid-cooled drive systems.

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16. IP54 / NEMA Type 12 Enclosure

The IP54 / NEMA Type 12 enclosure configuration is an important physical feature.

NEMA Type 12 is commonly associated with indoor industrial equipment where protection from dust, dirt, and other non-corrosive industrial contaminants is required.

The IP54 classification provides a corresponding level of protection against dust ingress and water splashing from multiple directions.

This makes the drive suitable for many indoor industrial environments, including:

• Electrical rooms.
• Motor-control areas.
• Pump stations.
• Manufacturing plants.
• Process facilities.
• Water-treatment plants.
• Mining processing areas.
• Cement plants.
• Material-handling facilities.

The enclosure rating should not be interpreted as permission to install the drive in any environment without additional engineering.

Temperature, humidity, corrosive atmospheres, altitude, ventilation, contamination, and maintenance requirements must still be evaluated.

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17. Frame 8 Construction

Frame 8 is an important physical characteristic of this drive.

A 740 A drive requires substantially more power-conversion hardware than a small machine drive.

The larger frame accommodates the necessary power electronics, cooling structure, bus components, connection arrangements, and associated hardware.

The Frame 8 platform is therefore designed around large industrial equipment.

The approximate physical dimensions of this configuration are:

2477 × 600 × 800 mm

The approximate weight is:

644 kg

Because of this size and weight, transportation and installation should be treated as a dedicated engineering activity.

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18. Dimensions and Weight

Physical Parameter	Approximate Value
Height	2477 mm
Width	600 mm
Depth	800 mm
Overall Size	Approx. 2477 × 600 × 800 mm
Approximate Weight	644 kg
Construction	Frame 8
Installation Style	800 mm Deep MCC Style
Enclosure	NEMA Type 12
Protection	IP54

The approximately 644 kg equipment weight is particularly important for installation planning.

The floor, mounting arrangement, transportation route, lifting equipment, and service access should all be checked before the drive is delivered to the final installation location.

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19. Main Product Applications

19.1 Large Pumping Systems

Large pumping applications are among the strongest applications for this drive.

A pump motor may need to operate at different speeds according to flow requirements.

Variable-frequency control allows the motor speed to be adjusted instead of relying exclusively on mechanical throttling.

Typical applications include:

• Raw-water pumps.
• High-lift pumps.
• Cooling-water pumps.
• Industrial process pumps.
• Wastewater pumps.
• Booster pumps.
• Circulation pumps.
• Large irrigation systems.

The 740 A current class provides sufficient capacity for very large pumping motors.

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20. Large Fans

Large industrial fans frequently benefit from variable-speed operation.

Instead of operating continuously at full speed, the motor can be adjusted according to process requirements.

Applications include:

• Furnace fans.
• Industrial ventilation.
• Exhaust systems.
• Process-air systems.
• Cooling fans.
• Dust-collection systems.
• Combustion-air systems.

Large fan assemblies can have considerable inertia, so acceleration and deceleration requirements should be evaluated carefully.

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21. Large Blowers

Industrial blowers may require large motors and continuous operation.

The PowerFlex 755 architecture provides the current capacity and control flexibility required for large blower systems.

Typical applications include:

• Aeration blowers.
• Process-air blowers.
• Industrial ventilation.
• Pneumatic process systems.
• Combustion systems.
• Large air-handling equipment.

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22. Conveyor Systems

Large conveyors can represent significant motor loads.

Variable-speed control provides controlled acceleration and deceleration, which can reduce mechanical shock.

This can be important for:

• Long belt conveyors.
• Mining conveyors.
• Cement conveyors.
• Aggregate conveyors.
• Bulk material systems.
• Port material-handling systems.
• Industrial production conveyors.

For long conveyors, the drive’s ability to coordinate motor speed with the wider automation system can also be valuable.

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23. Mining Applications

Mining equipment often requires very large motors and substantial starting and running torque.

Potential applications include:

• Ore conveyors.
• Crushers.
• Pumps.
• Fans.
• Material-handling systems.
• Processing equipment.
• Ventilation systems.

The industrial enclosure and high current capacity make the drive suitable for centralized electrical installations associated with mining infrastructure.

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24. Cement and Aggregate Processing

Cement and aggregate facilities contain many large motor loads.

The 20G1AJD740AN0NNNNN can be considered for:

• Large conveyors.
• Crushers.
• Fans.
• Dust-collection systems.
• Process pumps.
• Material-handling machinery.
• Processing equipment.

In these environments, variable-speed control can also help coordinate different stages of the process.

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25. Water and Wastewater

Large water-treatment systems often require continuous operation of high-power pumps and blowers.

Typical applications include:

• Raw-water pumping.
• High-lift pumping.
• Wastewater transfer.
• Aeration.
• Sludge handling.
• Process-water circulation.
• Large booster systems.

EtherNet/IP integration is particularly useful when the drive needs to communicate operating information to a centralized plant control system.

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26. Process Manufacturing

The drive is also suitable for large process machinery.

Examples include:

• Large mixers.
• Process fans.
• Pumps.
• Material-handling equipment.
• Production machinery.
• Large rotating equipment.
• Auxiliary process systems.

The drive’s high-current capability makes it appropriate when the motor is beyond the practical range of smaller PowerFlex configurations.

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27. Main Advantages

27.1 Very High Current Capacity

The 740 A current class is the main advantage of this model.

It is intended for very large industrial motors and provides significantly more capacity than compact drive families.

This makes it suitable for equipment where motor current can reach several hundred amperes.

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27.2 700 HP Light-Duty Capability

The approximately 700 HP light-duty rating allows the drive to address very large motors.

This is particularly useful for applications where the mechanical load does not require the additional overload capability associated with heavy-duty operation.

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27.3 650 HP Normal-Duty Capability

The 650 HP normal-duty rating provides a strong general-purpose selection point for large industrial machinery.

It gives system designers a useful balance between motor capacity and normal industrial load requirements.

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27.4 500 HP Heavy-Duty Capability

The 500 HP heavy-duty rating provides substantial capacity for demanding applications.

Heavy-duty selection should be considered where acceleration torque, overload requirements, or mechanical loading is significant.

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27.5 Embedded EtherNet/IP

Embedded EtherNet/IP makes the drive easier to integrate into an industrial Ethernet control system.

This is especially useful for facilities with multiple large drives.

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27.6 Industrial Enclosure

The IP54 / NEMA Type 12 enclosure provides a robust packaged configuration for indoor industrial environments.

This reduces the need to treat the drive as an exposed electronic assembly.

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27.7 Air-Cooled Design

The air-cooled architecture is practical for many industrial plants.

It avoids the additional complexity associated with liquid cooling while providing a conventional thermal-management approach for a large drive.

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27.8 Frame 8 Platform

The Frame 8 platform is designed for high-power applications.

It provides the physical structure needed to accommodate the drive’s high current capacity.

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27.9 Flexible Application Range

The drive is not limited to a single machine category.

It can be considered for:

• Pumps.
• Fans.
• Blowers.
• Conveyors.
• Mining equipment.
• Cement machinery.
• Water-treatment equipment.
• Process machinery.
• Large material-handling systems.

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28. Five Recommended Related PowerFlex 755 Models

The following five models are closely related to the 20G1AJD740AN0NNNNN and are useful for comparing current capacity and motor-duty capability.

Model	Voltage	Current	LD HP	ND HP	HD HP	Frame	Enclosure	HIM
20G1AJD545AN0NNNNN	480 VAC 3PH	545 A	500 HP	450 HP	350 HP	8	IP54 / NEMA 12, 800 mm MCC Style	Blank / No HIM
20G1AJD617AN0NNNNN	480 VAC 3PH	617 A	600 HP	500 HP	400 HP	8	IP54 / NEMA 12, 800 mm MCC Style	Blank / No HIM
20G1AJD710AN0NNNNN	480 VAC 3PH	710 A	650 HP	600 HP	450 HP	8	IP54 / NEMA 12, 800 mm MCC Style	Blank / No HIM
20G1AJD740AN0NNNNN	480 VAC 3PH	740 A	700 HP	650 HP	500 HP	8	IP54 / NEMA 12, 800 mm MCC Style	Blank / No HIM
20G11JD800AN0NNNNN	480 VAC 3PH	800 A	800 HP	700 HP	600 HP	9	Large-frame industrial configuration	Blank / No HIM

The first four models are especially useful as a progressive sizing group.

The 545 A, 617 A, 710 A, and 740 A models allow the engineer to move upward in current capacity while remaining within the general PowerFlex 755 high-power architecture.

The 800 A model moves into the next frame class and is appropriate when the 740 A Frame 8 configuration is no longer sufficient.

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29. Related 740 A Configurations

The 740 A class is also available in different interface and common-mode configurations.

Model	Current Class	HIM	CM Jumper	Voltage	Frame	Main Difference
20G1AJD740AN0NNNNN	740 A	Blank / No HIM	Removed	480 VAC 3PH	8	Standard N0 configuration
20G1AJD740AN4NNNNN	740 A	Enhanced LCD Full Numeric	Removed	480 VAC 3PH	8	Adds enhanced local interface
20G1AJD740JN0NNNNN	740 A	Blank / No HIM	Installed	480 VAC 3PH	8	CM jumper installed
20G1AJD740JN4NNNNN	740 A	Enhanced LCD Full Numeric	Installed	480 VAC 3PH	8	Enhanced HIM plus CM jumper installed

This table is particularly useful for replacement work.

The four configurations have similar fundamental power ratings, but they are not necessarily interchangeable without checking the installation requirements.

The AN0 model is the blank-HIM configuration with the CM jumper removed.

The AN4 version adds the enhanced LCD full numeric HIM.

The JN0 and JN4 versions use the corresponding CM-jumper-installed configuration.

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30. Five Popular Allen-Bradley Models for Broader Comparison

Model	Product Family	Product Type	Approx. Application Class	Typical Application	Main Characteristic
25B-D030N114	PowerFlex 525	Compact AC Drive	Medium / Compact Machine	Conveyors, pumps, fans, machinery	Compact variable-frequency control
25C-D030N114	PowerFlex 523	Compact AC Drive	Compact Machine	Small industrial machines	Economical machine-level motor control
20G1AGE053JA0NNNNN	PowerFlex 755	AC Drive	High-Power Industrial	Pumps, fans, process machinery	High-performance industrial drive
20G1AGC260JN0NNNNN	PowerFlex 755	AC Drive	High-Power Industrial	Large motor applications	High-current PowerFlex 755 configuration
20G1AND302JA0NNNNN	PowerFlex 755	AC Drive	High-Power Industrial	Large industrial machinery	Large motor-control platform

The 25B and 25C products are more appropriate for compact machine applications.

The PowerFlex 755 models are intended for substantially larger industrial motor systems.

Therefore, when comparing the 20G1AJD740AN0NNNNN with the other models, the most meaningful comparisons are generally with other PowerFlex 755 configurations rather than with compact machine drives.

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31. Application Selection Guide

Application	Recommended Evaluation	Reason
Large centrifugal pump	Excellent candidate	High current and variable-speed control
Large process pump	Excellent candidate	High-power continuous operation
Large fan	Excellent candidate	Large motor capacity and speed control
Large blower	Excellent candidate	High-power continuous load
Long conveyor	Excellent candidate	Controlled acceleration and speed
Mining conveyor	Excellent candidate	High motor power and industrial construction
Cement conveyor	Excellent candidate	Large motor and centralized control
Crusher	Suitable with detailed duty evaluation	High starting and mechanical loading
Water-treatment pump	Excellent candidate	Variable-speed process control
Wastewater blower	Excellent candidate	High-power continuous operation
Large process machine	Very good candidate	High current and network integration
Small machine	Poor fit	Excessive power and physical size
Portable machine	Poor fit	Large 644 kg packaged configuration
Compact OEM panel	Generally unsuitable	Frame 8 dimensions are substantial

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32. Installation Requirements

The 20G1AJD740AN0NNNNN is a substantial piece of industrial electrical equipment.

The approximate dimensions are 2477 mm high × 600 mm wide × 800 mm deep, with an approximate weight of 644 kg.

This means that mechanical installation should be planned before electrical installation begins.

The following points should be evaluated:

• Floor loading.
• Mounting structure.
• Lifting equipment.
• Transportation route.
• Door and access dimensions.
• Maintenance clearance.
• Cable entry.
• Incoming power routing.
• Motor cable routing.
• Grounding.
• Ventilation.
• Heat dissipation.
• Network cabling.
• Service access.

The drive should not be treated as a lightweight panel-mounted component.

Its size and weight require suitable handling equipment and an appropriate installation structure.

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33. Thermal Management

Thermal management becomes increasingly important as drive power increases.

The 20G1AJD740AN0NNNNN can produce substantial heat during normal operation.

The surrounding installation should therefore provide sufficient ventilation and heat removal.

If the drive is installed in an electrical room, the room’s ventilation or cooling system should be evaluated based on the total heat generated by all installed equipment.

If several large drives are installed together, the combined heat load can become significant.

The air-cooling system must also remain clean and unobstructed.

Dust accumulation can reduce airflow and increase thermal stress.

Regular maintenance should therefore include inspection of the cooling path and associated components.

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34. Motor Cable Considerations

For a 740 A drive, motor cable selection is an important part of the overall system design.

The motor cable must be selected based on:

• Motor current.
• Cable length.
• Installation method.
• Ambient temperature.
• Grouping.
• Voltage rating.
• Insulation system.
• Grounding.
• EMC requirements.
• Applicable electrical standards.

Long motor cables can also influence common-mode current, reflected-wave behavior, and electromagnetic compatibility.

The drive should therefore be considered as one part of the complete motor-power system rather than as an isolated component.

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35. Control System Integration

The embedded EtherNet/IP interface allows the drive to participate in a larger automation system.

A typical architecture may contain:

• Programmable controller.
• Industrial Ethernet network.
• Operator interface.
• PowerFlex 755 drive.
• Motor.
• Process instrumentation.
• Supervisory control system.

In such an architecture, the drive can receive commands from the control system and return status and diagnostic information.

This is particularly valuable for large installations where operators need centralized visibility of many motor-driven systems.

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36. Maintenance and Troubleshooting

The N0 configuration does not include the enhanced local HIM as part of the standard configuration.

This means that maintenance planning should consider how technicians will access drive parameters and diagnostic information.

In a networked system, the control system and engineering software may provide the primary interface.

For installations where frequent local maintenance is expected, the related N4 configuration may be more convenient because it provides the enhanced LCD full numeric interface.

This is one of the main differences between the N0 and N4 configurations.

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37. Why the 740 A Model Is Important

Within the 480 VAC Frame 8 PowerFlex 755 range, the 740 A configuration represents a very high-capacity motor-control solution.

It provides more capacity than the 545 A, 617 A, and 710 A models while remaining within the same general Frame 8 product class.

This makes it useful when the motor current is close to the upper limit of a 710 A configuration.

However, selection should still be based on the actual motor current and duty classification.

If the application requires higher capacity than the 740 A Frame 8 configuration can provide, the next appropriate drive class should be evaluated rather than simply selecting the closest horsepower number.

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38. Comparison with 710 A Configuration

Feature	20G1AJD710AN0NNNNN	20G1AJD740AN0NNNNN
Voltage	480 VAC 3PH	480 VAC 3PH
Current	710 A	740 A
LD HP	650 HP	700 HP
ND HP	600 HP	650 HP
HD HP	450 HP	500 HP
Frame	8	8
Enclosure	IP54 / NEMA 12	IP54 / NEMA 12
Construction	800 mm Deep MCC Style	800 mm Deep MCC Style
Cooling	Air Cooled	Air Cooled
HIM	Blank / No HIM	Blank / No HIM
EtherNet/IP	Embedded	Embedded
CM Jumper	Removed	Removed
Dynamic Braking	None	None
Main Difference	Lower current capacity	Higher current and horsepower capacity

The 740 A model provides additional capacity over the 710 A configuration.

This can be useful when the motor’s full-load current is close to the upper limit of the 710 A model or when additional application margin is required.

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39. Comparison with 617 A Configuration

Feature	20G1AJD617AN0NNNNN	20G1AJD740AN0NNNNN
Voltage	480 VAC 3PH	480 VAC 3PH
Current	617 A	740 A
LD HP	600 HP	700 HP
ND HP	500 HP	650 HP
HD HP	400 HP	500 HP
Frame	8	8
Enclosure	IP54 / NEMA 12	IP54 / NEMA 12
Cooling	Air Cooled	Air Cooled
Communication	Embedded EtherNet/IP	Embedded EtherNet/IP
HIM	Blank / No HIM	Blank / No HIM
CM Jumper	Removed	Removed
Main Difference	Lower current class	Higher current class

The 740 A model is therefore a logical choice when a 617 A configuration does not provide enough current capacity for the motor and application duty.

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40. Overall Product Advantages

Advantage	Practical Benefit
740 A current class	Supports very large motors
700 HP LD	High motor capacity for light-duty applications
650 HP ND	Strong general industrial capacity
500 HP HD	Suitable for demanding high-load applications
Frame 8	High-power mechanical and electrical platform
480 VAC 3PH	Suitable for industrial high-power systems
IP54	Protection suitable for many industrial environments
NEMA Type 12	Industrial enclosure protection
Air cooled	Practical thermal management
Embedded EtherNet/IP	Simplifies network integration
Filtered configuration	Supports EMC-conscious installations
AC precharge	Controlled DC-link charging
Blank HIM	Suitable for network-centered installations
800 mm MCC style	Appropriate for centralized industrial electrical systems
High application flexibility	Pumps, fans, blowers, conveyors and process machinery

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41. Engineering Selection Recommendations

For a new installation, the following parameters should be verified before selecting the drive:

1. Motor rated voltage.
2. Motor full-load current.
3. Motor horsepower.
4. Motor frequency.
5. Application duty.
6. Required starting torque.
7. Acceleration time.
8. Deceleration time.
9. Motor inertia.
10. Load inertia.
11. Required stopping method.
12. Braking requirements.
13. Motor cable length.
14. Ambient temperature.
15. Altitude.
16. Enclosure requirements.
17. Grounding system.
18. Communication architecture.
19. Local operator requirements.
20. Available installation space.
21. Equipment lifting requirements.
22. Maintenance access.
23. Cooling and ventilation.
24. Required replacement compatibility.

The most important point is that motor horsepower alone should not be used as the only selection criterion.

For a high-power drive, motor full-load current and application duty are equally important.

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42. Recommended Related Models by Application

Application Requirement	Recommended Model
Around 350–400 HP class	20G1AJD545AN0NNNNN
Around 400–500 HP class	20G1AJD617AN0NNNNN
Around 450–600 HP class	20G1AJD710AN0NNNNN
Around 500–650 HP class	20G1AJD740AN0NNNNN
Above Frame 8 / higher current requirement	20G11JD800AN0NNNNN

This gives the engineer a straightforward progression through the high-power range.

The final selection should always be verified against the actual motor current and duty.

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43. Product Positioning

The 20G1AJD740AN0NNNNN should be considered a large industrial variable-frequency drive, not a compact machine inverter.

Its physical size, weight, current rating, and enclosure arrangement are all consistent with large industrial installations.

It is most valuable where:

• Motor power is high.
• Process speed must be controlled.
• Large loads need smooth acceleration.
• Network control is required.
• Centralized electrical installation is preferred.
• Industrial enclosure protection is needed.
• Large pumps, fans, conveyors, or process machines must be controlled.

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44. Five Related Models – Expanded Parameter Comparison

Model	Current	LD Rating	ND Rating	HD Rating	Voltage	Frame	Cooling	Enclosure	Dimensions / Weight
20G1AJD545AN0NNNNN	545 A	500 HP	450 HP	350 HP	480 VAC 3PH	8	Air	IP54 / NEMA 12	Large Frame 8 configuration
20G1AJD617AN0NNNNN	617 A	600 HP	500 HP	400 HP	480 VAC 3PH	8	Air	IP54 / NEMA 12	Large Frame 8 configuration
20G1AJD710AN0NNNNN	710 A	650 HP	600 HP	450 HP	480 VAC 3PH	8	Air	IP54 / NEMA 12	Approx. 2477 × 600 × 800 mm / approx. 644 kg
20G1AJD740AN0NNNNN	740 A	700 HP	650 HP	500 HP	480 VAC 3PH	8	Air	IP54 / NEMA 12	Approx. 2477 × 600 × 800 mm / approx. 644 kg
20G11JD800AN0NNNNN	800 A	800 HP	700 HP	600 HP	480 VAC 3PH	9	Air	Large industrial enclosure	Larger Frame 9 configuration

The 20G1AJD740AN0NNNNN sits near the top of this particular Frame 8 progression.

When the motor application approaches 700 HP under light-duty conditions or 650 HP under normal-duty conditions, this configuration becomes particularly relevant.

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45. Final Technical Summary

Category	Final Specification
Model	20G1AJD740AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product	PowerFlex Air-Cooled 755 AC Drive
Drive Type	High-Power AC Variable Frequency Drive
Input Voltage	480 VAC
Input Phase	3 Phase
Current Class	740 A
LD Rating	700 HP
ND Rating	650 HP
HD Rating	500 HP
Frame	Frame 8
Cooling	Air Cooled
Enclosure	NEMA Type 12
Protection	IP54
Construction	800 mm Deep MCC Style
Communication	Embedded EtherNet/IP
HIM	Blank / No HIM
Input Configuration	AC Input with Precharge
DC Terminals	None
Filtering	Filtered
CM Jumper	Removed
Dynamic Braking	No Internal Dynamic Braking Transistor
Approx. Dimensions	2477 × 600 × 800 mm
Approx. Weight	644 kg
Main Applications	Pumps, fans, blowers, conveyors, mining, cement, water/wastewater, process machinery
Main Advantage	High-current industrial motor control with network integration
Product Position	Large industrial / high-power drive

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46. Conclusion

The Allen-Bradley 20G1AJD740AN0NNNNN is a high-capacity PowerFlex 755 AC drive designed for large industrial motor-control applications.

Its 740 A current class, 700 HP light-duty rating, 650 HP normal-duty rating, and 500 HP heavy-duty rating make it suitable for demanding applications where smaller variable-frequency drives are no longer adequate.

The combination of 480 VAC three-phase operation, Frame 8 construction, air cooling, IP54 / NEMA Type 12 enclosure protection, and 800 mm deep MCC-style construction provides a substantial industrial drive platform for large equipment.

The embedded EtherNet/IP interface allows the drive to become part of a larger industrial automation architecture, while the N0 configuration provides a blank/no-HIM arrangement for systems where local operator interface hardware is not required as part of the standard drive configuration.

The model is especially well suited to large pumps, fans, blowers, conveyors, mining equipment, cement and aggregate machinery, water and wastewater systems, and large process machines.

Its main engineering advantage is the combination of very high current capacity with flexible duty ratings and industrial system integration.

For applications that require approximately 500 to 650 HP under normal or heavy operating conditions, or up to approximately 700 HP under light-duty conditions, the 20G1AJD740AN0NNNNN is a strong high-power drive configuration to consider.

For replacement applications, the complete catalog number should be matched carefully. Particular attention should be given to the N0/N4 HIM configuration, CM jumper configuration, filtering, dynamic-braking arrangement, voltage class, frame size, and physical installation requirements.

Because the unit is approximately 644 kg and approximately 2477 × 600 × 800 mm, mechanical handling, floor loading, transportation, ventilation, cable routing, and maintenance access should be incorporated into the installation plan from the beginning.

Overall, the 20G1AJD740AN0NNNNN represents a high-power PowerFlex 755 solution for large-scale industrial motor control where high current, substantial motor horsepower, network connectivity, industrial enclosure protection, and reliable variable-speed operation are required.