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Allen-Bradley 20G1AJC750AN0NNNNN PowerFlex 755 AC Drive

1. Product Introduction

The Allen-Bradley 20G1AJC750AN0NNNNN is a high-power PowerFlex 755 AC Drive designed for large three-phase industrial motors requiring high current capacity, adjustable-speed operation, industrial enclosure protection, and integration with an industrial Ethernet control system.

This model belongs to the PowerFlex 755 family and is configured for a 380–400 VAC class, three-phase power system. It has a 750 A normal-duty current rating, with a published 450 kW Light-Duty rating, 400 kW Normal-Duty rating, and 315 kW Heavy-Duty rating. The drive uses a Frame 8 power structure and an 800 mm deep MCC-style enclosure.

The configuration incorporates embedded EtherNet/IP, forced-air cooling, an AC input with precharge, no DC terminals, filtering, and a removed common-mode capacitor jumper. The catalog configuration also specifies no dynamic braking and a blank configuration without a local HIM.

The model is particularly suited to large industrial motor applications such as high-capacity pumps, fans, blowers, conveyors, material-handling equipment, mining machinery, cement equipment, process machinery, and other applications where motor current can reach several hundred amperes.

The 20G1AJC750AN0NNNNN is an older AN0 configuration and has been discontinued. Its direct replacement is 20G1AJC750JN0NNNNN. The replacement retains the same basic 750 A PowerFlex 755 high-power platform while using the newer J-series configuration.

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2. Brand and Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Catalog Number	20G1AJC750AN0NNNNN
Drive Class	High-Power Industrial AC Drive
Input Voltage Class	380–400 VAC
Input Phase	3 Phase
Rated Current	750 A
Frame Size	Frame 8
Cooling	Forced Air
Enclosure	IP54 / NEMA Type 12
Cabinet Style	800 mm Deep MCC Style
Communication	Embedded EtherNet/IP
Input Arrangement	AC Input with Precharge
DC Terminals	None
EMC Filter	Installed / Filtered
CM Jumper	Removed
Dynamic Braking	None
HIM	Blank / No HIM
Product Status	Discontinued
Direct Replacement	20G1AJC750JN0NNNNN

The PowerFlex 755 platform is intended for industrial applications where motor speed, torque, acceleration, deceleration, diagnostics, and networked control need to be managed within a more capable drive platform.

The 750 A configuration is toward the high-current end of the 400 VAC PowerFlex 755 range.

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3. Detailed Technical Specifications

Technical Parameter	Specification
Model / Catalog Number	20G1AJC750AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Input Voltage	380–400 VAC class
Input Phase	Three Phase
Normal-Duty Current	750 A
Light-Duty Current	796 A continuous class
Normal-Duty 1-Minute Current	825 A
Normal-Duty 3-Second Current	1125 A
Heavy-Duty Current	585 A
Heavy-Duty 1-Minute Current	878 A
Heavy-Duty 3-Second Current	1125 A
Light-Duty Power	450 kW
Normal-Duty Power	400 kW
Heavy-Duty Power	315 kW
Frame Size	Frame 8
Cooling	Forced Air
Enclosure	IP54
Enclosure Type	NEMA Type 12
Cabinet Style	800 mm Deep MCC Style
Input Type	AC Input with Precharge
DC Terminals	None
Communication	Embedded EtherNet/IP
Filtering	Filtered
CM Jumper	Removed
Dynamic Braking	None
HIM	Blank / No HIM
Approx. Width	600 mm class
Approx. Height	2,000–2,200 mm class
Approx. Depth	800 mm
Approx. Weight	500–700 kg
Installation Type	Floor-standing / MCC-style
Application Class	Large Industrial Motor Control

The published selection data identifies the 20G1AJC750AN0NNNNN as a Frame 8 PowerFlex 755 for 380–400 VAC three-phase operation, with 750 A Normal-Duty output, 450 kW Light-Duty capacity, 400 kW Normal-Duty capacity, and 315 kW Heavy-Duty capacity.

The 1-minute and 3-second current figures are important when evaluating applications with high acceleration torque, transient overloads, or demanding process conditions.

For final equipment procurement, the actual mechanical drawing should be used for exact dimensions and shipping weight. The dimensional and weight figures above are practical engineering planning values for a Frame 8, 800 mm MCC-style package rather than certified shipping dimensions.

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4. Electrical Characteristics

The 20G1AJC750AN0NNNNN is designed for large three-phase AC motor systems.

Its nominal voltage class is 380–400 VAC, making it suitable for industrial electrical systems commonly using approximately 400 V line-to-line supply.

The most important electrical characteristic is the 750 A Normal-Duty current rating.

This puts the drive firmly into the high-power industrial category.

For a drive of this size, selection should be based on the motor’s actual full-load current, required torque, overload profile, and operating cycle rather than simply matching the motor nameplate kW to the drive’s published kW rating.

The application should be evaluated according to:

• Motor full-load current.
• Motor rated voltage.
• Motor rated power.
• Motor speed.
• Motor frequency.
• Starting torque.
• Acceleration time.
• Deceleration time.
• Load inertia.
• Overload requirements.
• Operating cycle.
• Regenerative energy.
• Ambient temperature.
• Installation altitude.
• Motor cable length.

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5. Duty Ratings

One of the important characteristics of this model is the separation between Light-Duty, Normal-Duty, and Heavy-Duty operation.

Duty	Current	Power	Typical Load Type
Light Duty	750 A class / 796 A selection data	450 kW	Variable-torque and relatively moderate overload applications
Normal Duty	750 A	400 kW	General industrial applications
Heavy Duty	585 A	315 kW	Higher-torque / demanding overload applications

The 450 kW Light-Duty rating is particularly relevant for variable-torque equipment such as large centrifugal pumps and fans.

The 400 kW Normal-Duty rating is appropriate for many general industrial motor applications.

The 315 kW Heavy-Duty rating reflects the reduced continuous current capability when the application demands a more severe overload profile.

The published selection guide also lists transient current capabilities of up to approximately 1125 A for one of the high-demand duty conditions, making the transient current capability an important consideration for machinery requiring high starting or acceleration torque.

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6. High-Current 750 A Architecture

The 750 A rating is the defining characteristic of this model.

A 750 A-class drive is normally used where smaller Frame 6 or Frame 7 drives do not provide sufficient current capacity.

Applications can include:

• Large water pumps.
• Large cooling-water pumps.
• Industrial fans.
• Large process blowers.
• Mining conveyors.
• Cement conveyors.
• Bulk-material handling.
• Large mixers.
• Industrial process machinery.
• Large ventilation systems.

The high current rating also gives engineers additional flexibility when selecting motors for applications with demanding acceleration characteristics.

However, selecting a drive larger than the motor does not automatically provide additional process performance.

The final selection should be based on the motor current, load torque, acceleration requirements, and duty cycle.

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7. Frame 8 Construction

The drive uses a Frame 8 configuration.

Frame 8 is intended for substantially larger power levels than the compact drive frames used for small and medium-sized motors.

This has several practical consequences.

The installation requires considerably more physical space.

The equipment must be handled as heavy industrial electrical equipment.

The electrical room must provide adequate cooling.

Cable routing must be planned carefully.

Maintenance access must be considered during cabinet layout.

The floor and lifting arrangements must also be capable of handling a large electrical cabinet.

The Frame 8 designation is shared by several related high-power PowerFlex 755 models, including the 460 A, 540 A, 567 A, 650 A, 750 A, and 770 A configurations.

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8. IP54 / NEMA Type 12 Enclosure

The drive uses an IP54 / NEMA Type 12 enclosure arrangement.

This provides a protected industrial package suitable for many electrical-room and industrial cabinet applications.

Typical installation environments include:

• Manufacturing plants.
• Water-treatment plants.
• Wastewater plants.
• Mining facilities.
• Cement plants.
• Process plants.
• Material-handling facilities.
• Industrial utility areas.

The enclosure is designed to provide substantially greater protection than an open-frame drive.

Nevertheless, environmental conditions still need to be controlled.

Particular attention should be given to:

• Ambient temperature.
• Dust.
• Humidity.
• Condensation.
• Corrosive gases.
• Cooling-air quality.
• Ventilation.
• Electrical-room HVAC.

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9. 800 mm Deep MCC-Style Cabinet

The 800 mm deep MCC-style cabinet is an important mechanical characteristic.

This is not a small machine-mounted VFD.

The drive is intended for large centralized electrical installations.

The cabinet arrangement must accommodate:

• Incoming power connections.
• Motor output connections.
• Control wiring.
• Network wiring.
• Cooling airflow.
• Maintenance access.
• Safe cable routing.
• Service equipment.

For replacement projects, the existing cabinet depth and cable-entry configuration should be checked carefully.

The physical footprint of a new Frame 8 drive may not be identical to older equipment even when the electrical ratings are similar.

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10. Forced-Air Cooling

The 20G1AJC750AN0NNNNN uses forced-air cooling.

At a power level of approximately 400–450 kW, heat management becomes an important engineering issue.

The cooling system must remove heat generated by:

• Power semiconductor devices.
• DC bus components.
• Capacitors.
• Filters.
• Internal power connections.
• Switching components.

The installation therefore needs sufficient airflow.

The electrical room should have appropriate HVAC capacity.

Air inlet and exhaust paths should remain unobstructed.

Dust accumulation should be controlled.

Cooling fans should be included in preventive maintenance inspections.

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11. Embedded EtherNet/IP

The drive incorporates embedded EtherNet/IP.

This is an important feature for modern industrial automation systems.

The drive can be integrated into a networked control architecture for functions such as:

• Start commands.
• Stop commands.
• Speed references.
• Frequency references.
• Drive status.
• Current monitoring.
• Fault monitoring.
• Alarm monitoring.
• Diagnostic information.
• Parameter access.
• Operating-state information.

This makes the drive particularly suitable for large plants where many motors are supervised by a centralized PLC, HMI, SCADA, or process-control system.

The local drive does not have to be the primary operator station.

Instead, the drive can become an integrated component of the plant’s overall automation architecture.

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12. Blank / No HIM Configuration

The AN0 configuration specifies a Blank / No HIM arrangement.

This is important when comparing the model with JN4 configurations.

The AN0 configuration is particularly suitable for applications where the drive is primarily controlled from:

• PLC systems.
• Distributed control systems.
• SCADA systems.
• Central operator stations.
• Remote HMIs.
• Industrial Ethernet networks.

A no-HIM configuration can also simplify the physical drive package where local manual operation is not required.

For applications where maintenance personnel need direct access to the drive, an appropriate HIM configuration may be preferable.

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13. CM Jumper Removed

The catalog configuration specifies the CM jumper as removed.

This is an important configuration detail and should not be treated as an incidental catalog feature.

The common-mode configuration influences the electrical behavior of the drive system and must be considered together with:

• Grounding.
• Motor cable construction.
• Cable length.
• EMC requirements.
• Motor insulation.
• Plant electrical topology.
• Sensitive electronic equipment.

When replacing an existing drive, the original jumper configuration should be documented before installation.

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14. Filtering

The model is specified as filtered.

Filtering is relevant to the electrical environment of a high-power variable-frequency drive.

High-power switching devices naturally produce high-frequency electrical components.

The complete installation should therefore consider:

• Input filtering.
• Motor cable routing.
• Grounding.
• Shielding.
• Cable length.
• Communication cables.
• Sensitive instrumentation.
• Nearby control equipment.

Good installation practice is particularly important in process plants where large drives operate close to instrumentation and network equipment.

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15. Dynamic Braking

The 20G1AJC750AN0NNNNN is specified with no dynamic braking.

This means the standard catalog configuration does not include dynamic-braking equipment as part of the listed package.

For many variable-torque applications, this may be completely appropriate.

Typical examples include:

• Centrifugal pumps.
• Large fans.
• Blowers.

For machinery with substantial stored kinetic energy, the braking requirements should be analyzed separately.

Examples include:

• Large conveyors.
• High-inertia rotating equipment.
• Material-handling systems.
• Machinery requiring rapid stopping.
• Applications with frequent acceleration and deceleration.

Where significant regenerative energy exists, the braking strategy should be evaluated as part of the overall system design.

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16. Main Applications

16.1 Large Water Pumps

Large water pumps are one of the most natural applications for this drive.

Potential applications include:

• Raw-water pumping.
• Water-transfer systems.
• Cooling-water systems.
• Industrial water circulation.
• Municipal pumping.
• Process-water systems.
• Irrigation.
• High-capacity water distribution.

The drive can regulate motor speed according to actual process demand.

This can reduce unnecessary throttling and provide smoother motor acceleration.

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16.2 Wastewater Treatment

Wastewater plants often use large pumps and blowers.

The drive can be applied to:

• Lift pumps.
• Transfer pumps.
• Sludge pumps.
• Aeration blowers.
• Process-water pumps.
• Ventilation systems.

The high current rating makes the drive appropriate for large wastewater motors.

The embedded Ethernet interface can also be integrated into plant-wide monitoring and control.

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16.3 Large Fans

Large fans often represent an excellent application for variable-speed drives.

Examples include:

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

The 450 kW Light-Duty rating is particularly relevant to large variable-torque fan applications.

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16.4 Large Blowers

Industrial blowers may require substantial motor power.

Typical applications include:

• Aeration.
• Pneumatic material handling.
• Process-air systems.
• Furnace systems.
• Combustion systems.
• Industrial ventilation.

The drive can provide adjustable speed and controlled acceleration.

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16.5 Mining Conveyors

Mining conveyors can place substantial demands on motors and drive systems.

Typical equipment includes:

• Long belt conveyors.
• Ore conveyors.
• Coal conveyors.
• Aggregate conveyors.
• Transfer conveyors.
• Crushing-system conveyors.

The high current rating can support large conveyor motors.

However, conveyor applications should receive careful analysis of starting torque, belt tension, acceleration time, load inertia, and stopping requirements.

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16.6 Cement Plants

Large cement plants frequently use high-power motors for:

• Conveyors.
• Fans.
• Blowers.
• Process pumps.
• Material-handling systems.
• Cooling systems.
• Dust collection.

The 20G1AJC750AN0NNNNN is well suited to the high-power end of these applications.

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16.7 Material Handling

Large material-handling systems can require motors in the hundreds-of-kilowatt range.

The drive can provide:

• Controlled starting.
• Adjustable speed.
• Controlled acceleration.
• Centralized monitoring.
• Networked control.
• Fault diagnostics.

This can help reduce mechanical shock compared with direct-on-line motor starting.

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17. Advantages of the Product

17.1 Very High Current Capacity

The 750 A rating is the most obvious advantage.

It allows the drive to control substantially larger motors than smaller PowerFlex configurations.

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17.2 Up to 450 kW Light-Duty Rating

The 450 kW Light-Duty rating provides substantial capacity for variable-torque loads.

This makes the drive particularly attractive for:

• Large pumps.
• Large fans.
• Blowers.
• Water systems.
• Industrial ventilation.

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17.3 400 kW Normal-Duty Rating

The 400 kW Normal-Duty rating provides strong capacity for general industrial applications.

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17.4 315 kW Heavy-Duty Rating

The 315 kW Heavy-Duty rating provides a practical operating range for applications requiring greater overload capability.

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17.5 Embedded EtherNet/IP

Integrated network communication simplifies the architecture of large automated plants.

The drive can exchange commands and operating information with the control system without necessarily requiring an additional communication interface.

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17.6 Industrial Enclosure

The IP54 / NEMA Type 12 configuration provides a protected package suitable for many industrial installations.

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17.7 Frame 8 Power Architecture

The Frame 8 platform provides the electrical capacity required by large motors.

It is also part of a broader PowerFlex 755 architecture, allowing plants to standardize around the same general drive family across different motor sizes.

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17.8 800 mm MCC-Style Construction

The MCC-style package is useful for centralized electrical rooms.

It allows the high-power drive to be incorporated into an organized industrial electrical system rather than being treated as a small standalone machine component.

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18. Dimensions and Weight

The model is a large Frame 8 MCC-style drive.

For preliminary planning, the following values can be used.

Mechanical Parameter	Approximate Specification
Model	20G1AJC750AN0NNNNN
Frame	Frame 8
Enclosure	IP54 / NEMA Type 12
Cabinet Style	800 mm Deep MCC Style
Approx. Width	600 mm class
Approx. Height	2,000–2,200 mm class
Approx. Depth	800 mm
Approx. Weight	500–700 kg
Installation	Floor-standing
Cooling	Forced Air
Equipment Class	Heavy Industrial
Handling	Industrial lifting equipment recommended

The 800 mm deep MCC-style and Frame 8 characteristics are established features of this product configuration.

The width, height, and complete shipping weight can vary with the final cabinet and installation configuration.

Therefore, the dimensional and weight values above should be used for preliminary layout, transportation planning, and equipment-room planning only.

For final foundation loading, lifting calculations, door clearances, cable-entry planning, and shipment preparation, the final mechanical drawing should be used.

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19. Installation Requirements

A 750 A Frame 8 drive requires careful installation planning.

Electrical Installation

The following should be evaluated:

• Incoming voltage.
• Transformer capacity.
• Available fault current.
• Feeder size.
• Circuit protection.
• Disconnect arrangement.
• Grounding.
• Motor cable size.
• Motor cable length.
• Cable termination.
• EMC requirements.

Mechanical Installation

The following should also be confirmed:

• Cabinet footprint.
• Floor loading.
• Lifting route.
• Door width.
• Ceiling clearance.
• Maintenance access.
• Cable-entry location.
• Cooling airflow.
• Exhaust-air path.

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20. Motor Selection

The drive should be matched to the actual motor.

The following motor data should be collected from the motor nameplate:

Motor Parameter	Required Information
Rated Voltage	Motor rated voltage
Rated Current	Full-load current
Rated Power	kW / HP
Frequency	Hz
Rated Speed	RPM
Power Factor	Motor PF
Efficiency	Motor efficiency
Starting Torque	Required application torque
Motor Type	Induction / other supported motor type
Duty	Continuous / intermittent
Insulation	Motor insulation system
Cooling	Motor cooling method

For a 750 A drive, the motor’s actual current should be checked carefully.

A motor’s nominal kW rating by itself is not enough to determine whether the drive is correctly sized.

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21. Energy-Saving Applications

The model can be particularly useful in variable-torque applications.

For centrifugal pumps and fans, motor speed has a major effect on the mechanical power required by the load.

Instead of operating a motor continuously at full speed and restricting flow mechanically, a variable-speed drive can adjust motor speed to meet process demand.

Potential benefits include:

• Reduced energy consumption.
• Better process regulation.
• Reduced mechanical stress.
• Improved operating flexibility.
• Reduced unnecessary flow.
• Better system response.

Actual energy savings depend strongly on the application and operating profile.

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22. Process-Control Advantages

Variable-speed operation can provide more than simple motor starting and stopping.

The drive can be used as part of a larger process-control strategy.

Possible functions include:

• Speed regulation.
• Pressure control.
• Flow control.
• Tension control.
• Process synchronization.
• Acceleration control.
• Deceleration control.
• Load monitoring.
• Fault monitoring.

This makes the PowerFlex 755 platform suitable for systems where the motor is an active part of the process rather than simply an on/off device.

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23. Maintenance Advantages

Although this particular AN0 configuration does not include a local HIM, the embedded communication capability allows the drive to be integrated into a larger monitoring architecture.

A central automation system can be used to monitor:

• Drive status.
• Faults.
• Alarms.
• Speed.
• Current.
• Operating state.
• Communication status.

This can reduce the need for technicians to physically access every drive during normal operation.

For maintenance-intensive installations, the newer replacement configuration can also be considered when a local HIM is required.

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24. Related Models in the Same PowerFlex 755 Family

The following models are particularly relevant to the 20G1AJC750AN0NNNNN.

Model	Voltage	Current	LD Power	ND Power	HD Power	Frame	Enclosure
20G1AJC460AN0NNNNN	380–400 VAC	460 A	315 kW	250 kW	200 kW	8	IP54 / Type 12
20G1AJC540AN0NNNNN	380–400 VAC	540 A	315 kW	315 kW	250 kW	8	IP54 / Type 12
20G1AJC567AN0NNNNN	380–400 VAC	567 A	355 kW	315 kW	250 kW	8	IP54 / Type 12
20G1AJC650AN0NNNNN	380–400 VAC	650 A	400 kW	355 kW	315 kW	8	IP54 / Type 12
20G1AJC770AN0NNNNN	380–400 VAC	770 A	450 kW	400 kW	355 kW	8	IP54 / Type 12

These models form a useful current-capacity progression around the 750 A model.

The published selection data lists the 460 A, 540 A, 567 A, 650 A, 750 A, and 770 A versions as Frame 8 PowerFlex 755 configurations for the 380–400 VAC class.

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25. Same-Series Model Comparison

Model	Current	LD	ND	HD	Recommended Position
20G1AJC460AN0NNNNN	460 A	315 kW	250 kW	200 kW	Lower-capacity option
20G1AJC540AN0NNNNN	540 A	315 kW	315 kW	250 kW	Medium-high capacity
20G1AJC567AN0NNNNN	567 A	355 kW	315 kW	250 kW	Intermediate capacity
20G1AJC650AN0NNNNN	650 A	400 kW	355 kW	315 kW	Lower than 750 A
20G1AJC750AN0NNNNN	750 A	450 kW	400 kW	315 kW	Reference model
20G1AJC770AN0NNNNN	770 A	450 kW	400 kW	355 kW	Higher-capacity option

The 650 A and 770 A models are especially useful comparison points.

The 20G1AJC650AN0NNNNN is a logical choice when the motor current is below the 750 A requirement.

The 20G1AJC770AN0NNNNN provides additional capacity when the application approaches the upper range of the 750 A model.

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26. Five Recommended Same-Series / Related Models

1. 20G1AJC650AN0NNNNN

This is one of the closest related models.

It provides:

• 650 A current.
• 400 kW Light Duty.
• 355 kW Normal Duty.
• 315 kW Heavy Duty.

It is a logical alternative when the motor’s actual full-load current does not require the full 750 A capacity.

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2. 20G1AJC770AN0NNNNN

This model moves one step upward in current capability.

It provides:

• 770 A current.
• 450 kW Light Duty.
• 400 kW Normal Duty.
• 355 kW Heavy Duty.

It is useful when the application requires more capacity than the 750 A configuration.

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3. 20G1AJC567AN0NNNNN

The 567 A model is useful when the motor is significantly smaller than the 750 A requirement.

It provides:

• 567 A current.
• 355 kW Light Duty.
• 315 kW Normal Duty.
• 250 kW Heavy Duty.

This can be a better-sized option when the motor’s current and load requirements fall below the 650 A and 750 A classes.

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4. 20G1AJC540AN0NNNNN

The 540 A model provides another lower-capacity Frame 8 option.

Its 315 kW Normal-Duty rating makes it suitable for many large industrial motors without moving into the highest current range.

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5. 20G1AJC460AN0NNNNN

The 460 A configuration is the lower-current model in this particular Frame 8 progression.

It provides:

• 460 A.
• 315 kW Light Duty.
• 250 kW Normal Duty.
• 200 kW Heavy Duty.

It can be attractive where the physical Frame 8 platform is appropriate but the motor does not require 540 A or more.

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27. Five Popular Same-Brand Models

The following models are useful same-brand references across different application sizes.

Model	Series	Voltage Class	Current / Capacity	Frame	Typical Application
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	Compact	General-purpose machinery
25C-D030N114	PowerFlex 527	480 VAC class	30 A class	Compact	Networked machine control
20G1AGE053JA0NNNNN	PowerFlex 755	600 VAC	53 A	6	Medium industrial motors
20G1AGC260JN0NNNNN	PowerFlex 755	400 VAC	260 A	7	Large pumps and fans
20G1AND302JA0NNNNN	PowerFlex 755	480 VAC	302 A	7	Large industrial motor control

These models cover a wide range of motor-control requirements.

The 25-series models are more appropriate for compact machine applications.

The PowerFlex 755 models are positioned for larger industrial motor applications.

For a plant already standardized around the PowerFlex 755 platform, the 20G-series models are generally the more directly relevant alternatives.

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28. Popular Model Parameter Comparison

Model	Approx. Voltage	Current	Power Range	Frame	Enclosure / Construction	Typical Use
25B-D030N114	480 VAC class	30 A class	Medium-power	Compact	Industrial compact drive	Machine control
25C-D030N114	480 VAC class	30 A class	Medium-power	Compact	Networked machine drive	Automated machinery
20G1AGE053JA0NNNNN	600 VAC	53 A	50 HP ND class	6	IP54 / Type 12	Industrial motors
20G1AGC260JN0NNNNN	400 VAC	260 A	132 kW ND class	7	IP54 / Type 12	Large pumps/fans
20G1AND302JA0NNNNN	480 VAC	302 A	250 HP ND class	7	Open industrial configuration	Large motor applications

These models are not direct electrical substitutes for the 750 A unit.

They are better viewed as representative products within the broader Allen-Bradley drive portfolio.

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29. 20G1AJC750AN0NNNNN Versus 20G1AJC650AN0NNNNN

The two models are closely related.

Parameter	20G1AJC650AN0NNNNN	20G1AJC750AN0NNNNN
Voltage	380–400 VAC	380–400 VAC
Phase	3 Phase	3 Phase
Current	650 A	750 A
LD Power	400 kW	450 kW
ND Power	355 kW	400 kW
HD Power	315 kW	315 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cabinet Depth	800 mm	800 mm
Cooling	Forced Air	Forced Air
EtherNet/IP	Embedded	Embedded
Input	AC with Precharge	AC with Precharge
DC Terminals	None	None
CM Jumper	Removed	Removed
Dynamic Braking	None	None
HIM	Blank / No HIM	Blank / No HIM

The 750 A model provides additional Light-Duty and Normal-Duty capacity.

For a motor operating near 650 A, the 650 A configuration may be the more appropriate choice.

For a motor or application approaching 750 A, the 750 A configuration provides additional capacity.

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30. 20G1AJC750AN0NNNNN Versus 20G1AJC770AN0NNNNN

The 770 A configuration is another close alternative.

Parameter	20G1AJC750AN0NNNNN	20G1AJC770AN0NNNNN
Voltage	380–400 VAC	380–400 VAC
Current	750 A	770 A
LD Power	450 kW	450 kW
ND Power	400 kW	400 kW
HD Power	315 kW	355 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
Cabinet Style	800 mm MCC	800 mm MCC
EtherNet/IP	Embedded	Embedded
Dynamic Braking	None	None
HIM	Blank / No HIM	Blank / No HIM

The 770 A configuration becomes especially attractive when the application needs additional Heavy-Duty capacity.

Its Heavy-Duty rating is 355 kW, compared with 315 kW for the 750 A model.

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31. Replacement Consideration

One of the most important points about the 20G1AJC750AN0NNNNN is its lifecycle status.

The model was discontinued on June 30, 2024.

The direct replacement is:

20G1AJC750JN0NNNNN

The JN0 replacement retains the essential high-power characteristics of the original configuration, including:

• PowerFlex 755 platform.
• 750 A class.
• 400 VAC class.
• Frame 8.
• IP54 / NEMA Type 12.
• 800 mm MCC-style construction.
• Embedded EtherNet/IP.
• AC input with precharge.
• No DC terminals.
• No local HIM configuration.

This makes the JN0 version the natural starting point when replacing an existing 20G1AJC750AN0NNNNN.

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32. Replacement Planning Table

Item	Existing Configuration	Replacement Configuration
Catalog Number	20G1AJC750AN0NNNNN	20G1AJC750JN0NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage Class	380–400 VAC	380–400 VAC
Current	750 A	750 A
LD Power	450 kW	450 kW
ND Power	400 kW	400 kW
HD Power	315 kW	315 kW
Frame	8	8
Enclosure	IP54 / Type 12	IP54 / Type 12
Cooling	Forced Air	Forced Air
EtherNet/IP	Embedded	Embedded
Input	AC with Precharge	AC with Precharge
DC Terminals	None	None
HIM	Blank / No HIM	Blank / No HIM
Status	Discontinued	Replacement Configuration

The replacement should still be evaluated as a complete system replacement rather than assuming that every mechanical and electrical detail is automatically identical.

Before replacing an installed drive, verify:

• Incoming cable arrangement.
• Output cable arrangement.
• Control wiring.
• Network wiring.
• Grounding.
• Parameter settings.
• Motor data.
• Cabinet dimensions.
• Cooling.
• Protection settings.
• Safety configuration.

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33. Advantages in Industrial Automation

The 20G1AJC750AN0NNNNN is particularly valuable in plants where large motors are integrated into a centralized automation system.

The embedded EtherNet/IP interface provides a direct path between the drive and the plant control architecture.

This can simplify the exchange of:

• Speed commands.
• Start/stop commands.
• Status information.
• Current information.
• Fault information.
• Alarm information.
• Diagnostic information.

For large plants, this can reduce the need for separate hardwired monitoring points.

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34. Advantages in Large Pump Systems

For large pump systems, the drive provides several practical benefits.

The motor can accelerate gradually.

Pump speed can be adjusted according to process demand.

Pressure and flow can be controlled more accurately.

Mechanical shock can be reduced.

The pump can be operated below full speed when full capacity is not required.

This can improve process flexibility and potentially reduce energy consumption.

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35. Advantages in Conveyor Systems

For conveyors, controlled acceleration can be especially important.

A large conveyor contains considerable mechanical mass.

Starting the motor abruptly can create high mechanical stress.

Variable-speed control allows acceleration to be programmed according to the mechanical system.

This can help reduce stress on:

• Conveyor belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Drive pulleys.

The actual acceleration profile should always be determined from the conveyor manufacturer’s mechanical requirements.

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36. Advantages in Mining Applications

Mining systems often operate continuously and can place significant demands on motor-control equipment.

The 750 A PowerFlex 755 configuration is suitable for large motor applications where the motor current falls within its rating.

Potential uses include:

• Ore conveyors.
• Coal conveyors.
• Water pumps.
• Mine ventilation.
• Material handling.
• Processing equipment.

The protected enclosure is useful in industrial environments, but environmental suitability should still be confirmed for the specific mine location.

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37. Advantages in Cement and Aggregate Plants

Cement and aggregate plants commonly contain multiple large motors.

The drive can be applied to:

• Large fans.
• Conveyors.
• Blowers.
• Pumps.
• Material-handling systems.
• Dust-collection systems.
• Process equipment.

The ability to use a common PowerFlex platform across different motor sizes can simplify engineering and maintenance standardization.

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38. Recommended Application Selection

Application	Suitability	Main Consideration
Large Centrifugal Pump	Excellent	Variable-speed operation
Large Industrial Fan	Excellent	Variable-torque load
Large Blower	Excellent	High-power speed control
Water Treatment Pump	Excellent	Process regulation
Wastewater Pump	Excellent	High-current motor control
Mining Conveyor	Excellent	Starting torque and inertia
Cement Conveyor	Excellent	Large motor and controlled acceleration
Material Handling	Very Good	Load torque profile
Process Pump	Excellent	Flow and pressure control
Large HVAC Fan	Excellent	Variable-torque operation
Crusher	Application Dependent	High torque and overload
Compressor	Application Dependent	Torque/load profile
Hoist	Application Dependent	Braking and safety
High-Inertia Machine	Application Dependent	Deceleration energy
Small Motor	Not Recommended	Excessively large drive

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39. Important Engineering Considerations

Although the 20G1AJC750AN0NNNNN is a high-capacity drive, it should not automatically be selected simply because the motor has a high horsepower rating.

The correct selection should be based on actual electrical and mechanical requirements.

The most important questions are:

1. What is the motor’s full-load current?
2. What is the motor voltage?
3. What is the required continuous torque?
4. What is the required starting torque?
5. How quickly must the motor accelerate?
6. How quickly must it stop?
7. Does the load regenerate energy?
8. How often does the motor cycle?
9. What is the ambient temperature?
10. What is the motor cable length?
11. Is local operator control required?
12. Is dynamic braking required?
13. What is the available short-circuit current?
14. What network architecture is being used?
15. Is the existing cabinet large enough for the Frame 8 package?

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40. Maintenance Recommendations

A high-power Frame 8 drive should be included in a structured preventive-maintenance program.

Recommended inspections include:

Cooling System

Inspect cooling fans and airflow.

Check for dust accumulation.

Check for blocked ventilation paths.

Monitor abnormal temperature rise.

Electrical Connections

Inspect power connections.

Inspect motor connections.

Check grounding.

Inspect control wiring.

Inspect network connections.

Drive Condition

Review fault history.

Review alarm history.

Check operating conditions.

Check for abnormal vibration or noise.

Inspect enclosure condition.

Network

Check EtherNet/IP communication.

Check for intermittent communication faults.

Verify network connections.

Review drive status from the control system.

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41. Mechanical Handling

The approximate 500–700 kg weight class means that the unit should be treated as heavy industrial electrical equipment.

Transportation planning should include:

• Delivery vehicle capacity.
• Forklift or lifting equipment.
• Door dimensions.
• Corridor dimensions.
• Floor loading.
• Final cabinet position.
• Service access.
• Lifting points.

The actual equipment weight should always be confirmed from the final shipment documentation before transportation.

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42. Why the 750 A Model Is Important

Within the 400 VAC PowerFlex 755 range, the 750 A configuration occupies an important position between the 650 A and 770 A models.

It offers:

• More capacity than the 650 A version.
• Less capacity than the 770 A version.
• 450 kW Light-Duty capability.
• 400 kW Normal-Duty capability.
• 315 kW Heavy-Duty capability.

This makes it a practical selection for large motors that are too demanding for a 650 A drive but do not require the additional Heavy-Duty capacity of the 770 A configuration.

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43. Overall Product Assessment

The Allen-Bradley 20G1AJC750AN0NNNNN PowerFlex 755 AC Drive is a high-power industrial variable-frequency drive intended for large 400 VAC-class three-phase motors.

Its 750 A current rating, 450 kW Light-Duty capacity, 400 kW Normal-Duty capacity, and 315 kW Heavy-Duty capacity place it firmly in the large industrial motor-control category.

The Frame 8 architecture, IP54 / NEMA Type 12 enclosure, 800 mm deep MCC-style cabinet, forced-air cooling, and embedded EtherNet/IP make the drive suitable for centralized industrial electrical installations.

Its strongest application areas include large pumps, fans, blowers, conveyors, mining equipment, cement equipment, water-treatment systems, wastewater equipment, and large process machinery.

The 750 A rating provides a substantial current margin compared with the 650 A version, while the 770 A model provides another step upward when additional Heavy-Duty capacity is required.

The no-HIM configuration makes the AN0 version well suited to installations where operation and monitoring are performed through a PLC, SCADA system, HMI, or industrial Ethernet network.

The absence of dynamic braking should be considered carefully for high-inertia applications.

The approximate mechanical planning dimensions of 600 mm width × 2,000–2,200 mm height × 800 mm depth, with an approximate weight of 500–700 kg, indicate that the drive must be treated as major industrial electrical equipment.

The exact dimensions and final weight should be confirmed against the final mechanical documentation before equipment-room construction, transportation, foundation work, or lifting operations.

A particularly important consideration is the product lifecycle.

The 20G1AJC750AN0NNNNN has been discontinued, with 20G1AJC750JN0NNNNN identified as the direct replacement.

For an existing installation, the original AN0 model can therefore remain an important reference for maintenance, spare-parts identification, system documentation, and replacement planning.

For a new project, the JN0 replacement configuration should normally be considered instead of purchasing the discontinued AN0 version.

From an engineering standpoint, the 20G1AJC750AN0NNNNN is best characterized as a high-current, high-power, Frame 8 PowerFlex 755 industrial AC drive for large three-phase motor applications.

Its combination of 750 A output capability, up to 450 kW Light-Duty power, 400 kW Normal-Duty power, 315 kW Heavy-Duty power, IP54 / NEMA Type 12 protection, forced-air cooling, 800 mm MCC-style construction, embedded EtherNet/IP, and centralized-control compatibility makes it particularly suitable for large industrial motor systems.

For applications where motor current is near the upper end of the 650 A class, the 750 A model provides useful additional capacity.

For applications requiring still greater Heavy-Duty capability, the 770 A version becomes an attractive related model.

For smaller motors, the 650 A, 567 A, 540 A, or 460 A Frame 8 configurations can provide more appropriately matched alternatives.

In a large industrial plant, this model is particularly valuable when high motor power, networked control, reliable variable-speed operation, and centralized electrical-room installation are all required.