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Allen-Bradley 20G1ALD545JN0NNNNN PowerFlex 755 AC Drive
1. Product Overview
The Allen-Bradley 20G1ALD545JN0NNNNN is a high-power PowerFlex 755 AC Drive designed for large industrial motor-control applications.
It is a Frame 8, air-cooled AC drive intended for large three-phase motors operating from a 480 VAC class power system. With a rated output current of 545 A, the drive is suitable for large industrial equipment where high motor current, reliable variable-speed control, and integration with an industrial automation network are required.
The model is configured as an 800 mm deep MCC-style drive, with forced-air cooling, AC input with precharge, no external DC terminals, embedded EtherNet/IP communication, EMC filtering, and a CM jumper installed.
The model is also configured with no HIM, meaning the standard catalog configuration does not include a local Human Interface Module. This configuration can be attractive for centralized automation systems where drive operation and parameter management are primarily handled through the control network or an external engineering interface.
The 20G1ALD545JN0NNNNN is intended for applications such as large conveyors, pumps, fans, blowers, compressors, mixers, process equipment, material-handling machinery, and other large industrial machines.
2. Brand and Product Series
| Item | Description |
|---|---|
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Product Series | PowerFlex 755 |
| Product Type | AC Variable Frequency Drive |
| Model | 20G1ALD545JN0NNNNN |
| Drive Construction | Air Cooled |
| Frame | Frame 8 |
| Installation Style | MCC Style |
| Input Voltage Class | 480 VAC |
| Input Phase | 3 Phase |
| Rated Output Current | 545 A |
| Communication | Embedded EtherNet/IP |
| Cooling | Forced Air |
| Input Configuration | AC Input with Precharge |
| External DC Terminals | None |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Enclosure | Type 1 / IP20 |
| Cabinet Depth | 800 mm |
The PowerFlex 755 series is designed for industrial applications requiring a more advanced and higher-capacity AC drive than compact machine-level variable-frequency drives.
The 20G1ALD545JN0NNNNN belongs to the large-frame portion of the series and is designed around high-current industrial motor applications.
3. Main Technical Parameters
| Parameter | Specification |
|---|---|
| Model | 20G1ALD545JN0NNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Drive Type | AC Variable Frequency Drive |
| Voltage Class | 480 VAC |
| Input Phase | 3 Phase |
| Output Current | 545 A |
| Light Duty Rating | 500 HP |
| Normal Duty Rating | 450 HP |
| Heavy Duty Rating | 350 HP |
| Frame Size | Frame 8 |
| Cooling Method | Forced Air / Air Cooled |
| Input Type | AC Input with Precharge |
| External DC Terminals | No |
| Communication | Embedded EtherNet/IP |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Protection Style | Type 1 / IP20 |
| Cabinet Style | 800 mm Deep MCC Style |
| Approx. Height | 2453 mm |
| Approx. Width | 600 mm |
| Depth | 800 mm |
| Approx. Weight | Approximately 620–625 kg |
| Main Application | Large Industrial AC Motor Control |
4. Electrical Characteristics
The 20G1ALD545JN0NNNNN is designed for a 480 VAC, three-phase industrial power system.
Its 545 A output-current rating places it in the high-power range of the PowerFlex 755 family.
This current capability allows the drive to control substantially larger motors than compact AC drives typically used for small machine applications.
The drive uses an AC input with a precharge system.
The AC-input architecture is intended for conventional industrial motor-control systems in which the drive receives power from a three-phase AC distribution system and produces a controlled variable-frequency output for the motor.
The configuration does not provide external DC input terminals.
This makes the model particularly appropriate for conventional AC-fed applications where a common DC-bus architecture is not required.
5. Motor Power Ratings
The 545 A configuration provides different motor ratings depending on the required duty classification.
| Duty Classification | Motor Rating |
|---|---|
| Light Duty | 500 HP |
| Normal Duty | 450 HP |
| Heavy Duty | 350 HP |
| Output Current | 545 A |
| Input Voltage Class | 480 VAC |
| Phase | 3 Phase |
The 500 HP Light Duty rating is applicable to operating conditions with relatively moderate overload requirements.
The 450 HP Normal Duty rating provides a lower horsepower level for applications with more demanding continuous operation.
The 350 HP Heavy Duty rating is intended for applications where higher overload capability and more demanding torque conditions are involved.
When selecting the drive for an actual machine, motor horsepower alone should not be used as the only selection criterion.
Motor nameplate current, acceleration time, overload requirement, duty cycle, ambient temperature, altitude, load inertia, mechanical transmission, and operating speed range should all be evaluated.
6. 545 A Output Capacity
The 545 A output rating is one of the most important features of the 20G1ALD545JN0NNNNN.
This high current capacity makes the drive suitable for large industrial motors and high-capacity machinery.
Typical applications can involve motors ranging from several hundred horsepower upward, depending on duty classification and actual motor characteristics.
The high current capacity is particularly useful where the motor must accelerate a large mechanical load.
Examples include large conveyors carrying bulk material, high-capacity pumps, large fans, compressors, crushers, mixers, and other machinery with significant mechanical inertia.
The 545 A capacity also gives system designers additional flexibility when selecting a motor within the appropriate duty rating.
7. 480 VAC Three-Phase Power
The drive is designed for a 480 VAC three-phase industrial power system.
480 VAC is widely used for large industrial motors because it allows substantial motor power to be transmitted without requiring extremely high current at the supply side.
For large motors, the electrical installation must be designed carefully.
Power-cable sizing, upstream protection, grounding, short-circuit rating, disconnecting means, cabinet ventilation, and motor-cable routing should all be considered during system engineering.
The drive should be installed as part of a complete industrial electrical system rather than as an isolated component.
8. AC Input with Precharge
The 20G1ALD545JN0NNNNN uses an AC input with precharge configuration.
Precharge is important in large variable-frequency drives because the internal DC-link capacitors require controlled charging when the drive is energized.
Without appropriate current limiting during the initial charging process, a large capacitor bank could draw an excessive inrush current.
The precharge arrangement helps manage this initial energization process and supports reliable operation of the high-power DC bus.
This becomes particularly important in large Frame 8 drives because the internal energy-storage system is substantially larger than that of small industrial drives.
9. No External DC Terminals
The requested configuration is an AC-fed drive with no external DC terminals.
This configuration is appropriate for conventional three-phase AC input systems.
It is therefore well suited to standard applications in which each drive receives its own AC supply.
Applications requiring a common DC bus, shared regenerative energy, or specialized DC-link arrangements should be evaluated separately because they may require a different drive configuration.
10. Embedded EtherNet/IP
One of the major advantages of the PowerFlex 755 platform is its ability to integrate into an industrial automation network.
The 20G1ALD545JN0NNNNN includes embedded EtherNet/IP capability.
This allows the drive to exchange operating and control information with a plant automation system.
Typical network functions can include:
- Start and stop commands.
- Speed references.
- Frequency references.
- Drive status.
- Motor current.
- Fault information.
- Alarm information.
- Diagnostic information.
- Operating parameters.
- Control commands.
- Feedback information.
This can significantly reduce the amount of hardwired control required in a centralized automation system.
11. No HIM Configuration
The requested model uses a Blank / No HIM configuration.
HIM means Human Interface Module.
A drive without a local HIM can be advantageous in systems where local manual operation is not required or where the drive is intended to be controlled primarily from a PLC, HMI, engineering workstation, or industrial network.
This configuration can also be useful when multiple drives are installed in a centralized MCC.
Instead of providing a local operator interface on every drive, the plant control system can provide a common interface for monitoring and control.
For maintenance purposes, commissioning personnel can use appropriate engineering tools and communication interfaces to access drive parameters and diagnostic information.
12. CM Jumper Installed
The model is configured with the CM jumper installed.
This configuration relates to the drive’s common-mode and filtering arrangement.
The CM configuration can affect the electrical characteristics of the drive and its interaction with the motor-cable system.
For installations involving long motor cables, sensitive instrumentation, communication equipment, or strict electromagnetic-compatibility requirements, grounding, cable shielding, motor-cable construction, and drive configuration should all be considered together.
The presence of the CM jumper should therefore be retained or modified only according to the actual electrical installation requirements.
13. Filtered Configuration
The 20G1ALD545JN0NNNNN is configured with filtering.
Filtering is important in large variable-frequency-drive systems because high-frequency switching can produce electrical noise.
A properly designed filtering and grounding system can help reduce electromagnetic interference and improve compatibility with surrounding industrial equipment.
This is particularly important in plants where high-power drives operate close to:
- PLC systems.
- Industrial Ethernet equipment.
- Measurement instruments.
- Sensors.
- HMI systems.
- Process controllers.
- Communication equipment.
- Electronic protection systems.
Filtering should always be considered together with proper cable shielding and grounding practices.
14. Frame 8 Construction
The 20G1ALD545JN0NNNNN uses Frame 8 construction.
Frame 8 is intended for high-current industrial drive applications.
Compared with small and medium-frame drives, Frame 8 equipment requires significantly more attention to:
- Cabinet dimensions.
- Mechanical support.
- Cable routing.
- Ventilation.
- Lifting.
- Floor loading.
- Maintenance clearance.
- Power-terminal access.
- Installation sequence.
The large-frame construction provides the physical space required for the power electronics and cooling system associated with a 545 A drive.
15. 800 mm Deep MCC Style
The drive is configured as an 800 mm deep MCC-style unit.
The 800 mm depth is an important mechanical parameter when planning the electrical room or motor-control-center installation.
The cabinet arrangement should allow sufficient room for:
- Incoming power cables.
- Motor cables.
- Control wiring.
- Network cables.
- Ventilation.
- Maintenance access.
- Door clearance.
- Cable bending radius.
- Lifting and installation equipment.
For a large industrial drive, mechanical planning should be completed before the equipment is delivered to the site.
16. Dimensions and Weight
The 20G1ALD545JN0NNNNN is a large Frame 8 drive.
The approximate mechanical information can be summarized as follows.
| Mechanical Parameter | Approximate Specification |
|---|---|
| Model | 20G1ALD545JN0NNNNN |
| Frame | Frame 8 |
| Height | Approx. 2453 mm |
| Width | Approx. 600 mm |
| Depth | 800 mm |
| Approx. Weight | Approx. 620–625 kg |
| Cabinet Style | MCC Style |
| Protection | Type 1 / IP20 |
| Cooling | Forced Air |
| Installation | Floor / MCC Cabinet Installation |
The approximate overall envelope is about 2453 mm high × 600 mm wide × 800 mm deep.
The equipment weight is approximately 620–625 kg, depending on the precise mechanical configuration and supplied accessories.
The weight should be regarded as an engineering and handling estimate rather than a substitute for the final mechanical drawing or shipping documentation.
Because the equipment is extremely heavy compared with compact AC drives, the installation plan should include suitable lifting equipment and appropriate floor-loading provisions.
17. Cooling System
The 20G1ALD545JN0NNNNN uses forced-air cooling.
At a 545 A current rating, the drive can produce substantial heat during normal operation.
The cooling system therefore plays an important role in maintaining appropriate internal operating temperatures.
The cabinet installation should provide adequate airflow.
Air intake and exhaust paths should not be obstructed.
Dust and contamination should also be controlled because excessive contamination can reduce cooling efficiency and increase the risk of thermal problems.
The electrical room or MCC installation should be designed to manage the heat generated by the drive as well as the heat generated by other equipment installed nearby.
18. Enclosure and Protection
The specified drive is configured as Type 1 / IP20 and uses an 800 mm deep MCC-style arrangement.
This configuration is intended for installation in an appropriate industrial electrical environment.
IP20 should not be interpreted as protection against water or outdoor weather exposure.
The surrounding electrical enclosure and installation environment should therefore provide the environmental protection required by the application.
Particular attention should be paid to:
- Dust.
- Moisture.
- Condensation.
- Corrosive gases.
- Chemical contamination.
- Ambient temperature.
- Altitude.
- Vibration.
- Airflow.
19. Dynamic Braking
The specified model has no dynamic braking in its standard configuration.
Dynamic braking is generally considered when a motor-driven load contains substantial stored mechanical energy and must be decelerated quickly.
Examples include:
- High-inertia conveyors.
- Hoisting systems.
- Centrifuges.
- Large rotating machines.
- Rapid-deceleration machinery.
- Overhauling loads.
If the application requires rapid deceleration, the complete braking strategy should be evaluated during system design.
Depending on the application, the final solution may involve electrical braking, regenerative operation, mechanical braking, or a combination of methods.
20. Product Applications
20.1 Large Conveyor Systems
Large conveyor systems are one of the most suitable application categories for a high-current AC drive.
Conveyors transporting bulk materials can require substantial torque during acceleration.
The 545 A capacity provides the drive with sufficient capability for large motor applications when the motor falls within the appropriate duty rating.
Typical applications include:
- Bulk-material handling.
- Mining conveyors.
- Aggregate handling.
- Industrial production conveyors.
- Warehouse material handling.
- Heavy manufacturing lines.
20.2 Large Pumps
Large pumps frequently require variable-speed operation.
A high-power AC drive can adjust motor speed according to actual process requirements rather than operating the pump continuously at a fixed speed.
Potential applications include:
- Industrial water systems.
- Process-water circulation.
- Cooling-water systems.
- Water treatment.
- Large fluid-transfer systems.
- Industrial pumping stations.
20.3 Large Fans and Blowers
Large industrial fans and blowers can also benefit from variable-speed motor control.
The drive can adjust motor speed according to airflow demand.
This is useful in:
- Industrial ventilation.
- Exhaust systems.
- Process-air systems.
- Cooling systems.
- Combustion-air systems.
- Large building or plant ventilation systems.
20.4 Compressors
Large compressors can require high motor current and controlled acceleration.
The 20G1ALD545JN0NNNNN provides a suitable high-power platform for compressor motor control when the electrical and mechanical characteristics of the application match the drive ratings.
20.5 Mixers and Agitators
Industrial mixers can require substantial starting torque and controlled speed.
The drive can be used to control motor speed according to the production process.
This can be useful in chemical processing, food production, material preparation, wastewater treatment, and other industrial processes.
20.6 Crushers and Heavy Process Machinery
Heavy process machinery can impose significant torque requirements on the motor.
The high current capacity of the 20G1ALD545JN0NNNNN makes it suitable for applications where a smaller drive would not provide sufficient capacity.
21. Main Product Advantages
21.1 High 545 A Current Capacity
The 545 A output rating is the most obvious advantage of this model.
It allows the drive to control large industrial motors and large mechanical loads.
21.2 High Motor Power Capability
The drive can support up to approximately 500 HP in the applicable Light Duty classification.
This places the product firmly in the large industrial motor-control category.
21.3 Industrial Automation Integration
Embedded EtherNet/IP makes the drive suitable for integration into modern industrial control systems.
This allows drive control and monitoring to be integrated into a centralized automation architecture.
21.4 No Local HIM Required
The No-HIM configuration is useful for centralized systems where operators control equipment from a PLC or HMI.
It avoids installing a local operator interface on every drive when local manual operation is not necessary.
21.5 Large-Frame Construction
Frame 8 construction provides the physical and electrical architecture required for high-current applications.
It is intended for large industrial installations rather than small machine applications.
21.6 Forced-Air Cooling
The forced-air cooling arrangement provides the thermal management required for high-power operation.
When installed with proper ventilation, it supports continuous industrial operation.
21.7 Filtering and CM Configuration
The filtered configuration with the CM jumper installed provides an electrical configuration designed for industrial applications where electromagnetic compatibility is an important consideration.
21.8 Flexible Application Range
The same drive platform can be used across many types of industrial equipment.
This can simplify standardization when a plant operates multiple large motor-driven machines.
22. Five Recommended Related PowerFlex 755 Models
The following five models are closely related to the requested model and can be considered when comparing current rating, motor capacity, configuration, or enclosure arrangement.
| Model | Series | Current | LD Rating | ND Rating | HD Rating | Main Characteristics |
|---|---|---|---|---|---|---|
| 20G1ALD545AN0NNNNN | PowerFlex 755 | 545 A | 500 HP | 450 HP | 350 HP | Same current class, alternative CM/HIM configuration |
| 20G1ALD545AN2NNNNN | PowerFlex 755 | 545 A | 500 HP | 450 HP | 350 HP | Same 545 A class with alternative interface configuration |
| 20G1ALD545JN4NNNNN | PowerFlex 755 | 545 A | 500 HP | 450 HP | 350 HP | Same current and frame class with alternative configuration |
| 20G1ALD617JN0NNNNN | PowerFlex 755 | 617 A | 600 HP | 500 HP | 400 HP | Higher-current Frame 8 alternative |
| 20G1ALD710JN0NNNNN | PowerFlex 755 | 710 A | 650 HP | 600 HP | 450 HP | Higher-capacity large industrial drive |
These models are particularly useful when the project requires a comparison between different drive configurations within the same large-frame PowerFlex 755 family.
The 545 A models are appropriate when the motor current requirement remains within the 545 A class.
The 617 A and 710 A models provide additional current capacity for larger motors and heavier loads.
23. Related Model Comparison
| Model | Current | Light Duty | Normal Duty | Heavy Duty | Frame | Typical Use |
|---|---|---|---|---|---|---|
| 20G1ALD545AN0NNNNN | 545 A | 500 HP | 450 HP | 350 HP | 8 | Large industrial motor |
| 20G1ALD545AN2NNNNN | 545 A | 500 HP | 450 HP | 350 HP | 8 | Large industrial motor |
| 20G1ALD545JN4NNNNN | 545 A | 500 HP | 450 HP | 350 HP | 8 | Large industrial motor |
| 20G1ALD617JN0NNNNN | 617 A | 600 HP | 500 HP | 400 HP | 8 | Higher-power machinery |
| 20G1ALD710JN0NNNNN | 710 A | 650 HP | 600 HP | 450 HP | 8 | Very large motor applications |
The three 545 A models are useful for configuration comparison, while the 617 A and 710 A versions are useful when the application requires greater current capacity.
24. Five Popular Allen-Bradley Models for Comparison
| Model | Series | Typical Power Class | Main Application | Key Characteristics |
|---|---|---|---|---|
| 25B-D010N104 | PowerFlex 525 | Compact | General machine control | Compact variable-frequency drive for smaller motors |
| 25C-D010N103 | PowerFlex 527 | Compact | Machine automation | Machine-oriented AC drive with automation integration |
| 20F11NC2P1JA0NNNNN | PowerFlex 753 | Medium / Large | Industrial machinery | Industrial AC drive for demanding motor-control applications |
| 20F11NC8P0JA0NNNNN | PowerFlex 753 | Medium / Large | Process and machinery | Higher-capacity PowerFlex 753 configuration |
| 20G1ALD545JN0NNNNN | PowerFlex 755 | High Power | Large industrial equipment | 545 A, 480 VAC class, Frame 8 |
The PowerFlex 525 and PowerFlex 527 are more commonly associated with smaller machine applications.
The PowerFlex 753 occupies a broader industrial-drive segment.
The PowerFlex 755 provides a higher level of capacity and configuration flexibility for large industrial motor systems.
The 20G1ALD545JN0NNNNN is specifically intended for the high-power end of these applications.
25. Comparison of Drive Families
| Product Family | General Power Range | Typical Application | Physical Class | Control Requirements |
|---|---|---|---|---|
| PowerFlex 525 | Small to Medium | Machine equipment | Compact | Basic to advanced machine control |
| PowerFlex 527 | Small to Medium | Automation machinery | Compact | Integrated machine automation |
| PowerFlex 753 | Medium to Large | Industrial equipment | Medium / Large | Industrial process and machinery |
| PowerFlex 755 | Large to Very Large | Large industrial systems | Large Frame | Advanced industrial motor control |
| 20G1ALD545JN0NNNNN | High Power | Large motor applications | Frame 8 | Large-scale industrial automation |
26. Applications by Industry
| Industry | Typical Equipment | Suitability |
|---|---|---|
| Manufacturing | Conveyors, mixers, process machinery | High |
| Mining | Conveyors, crushers, material handling | High |
| Water Treatment | Large pumps, blowers | High |
| Utilities | Pumps, fans, process equipment | High |
| Chemical Processing | Pumps, mixers, compressors | High |
| Cement / Aggregate | Crushers, conveyors, fans | High |
| Material Handling | Heavy conveyors, lifts, transfer systems | High |
| Food Processing | Large mixers, pumps, conveyors | Application dependent |
| HVAC / Industrial Ventilation | Large fans and blowers | High |
| General Machinery | Large AC motor systems | High |
27. Why the No-HIM Configuration Can Be Useful
The No-HIM configuration is particularly practical in automated industrial facilities.
In a centralized control system, operators may not need to walk to the drive cabinet to change operating parameters.
Instead, the PLC and HMI can provide centralized control.
This approach can be useful when dozens of drives are installed in the same production line.
A centralized interface can display:
- Drive speed.
- Motor current.
- Frequency.
- Running status.
- Fault status.
- Alarm information.
- Operating hours.
- Process information.
- Maintenance information.
The No-HIM configuration can therefore be appropriate for systems designed around centralized automation rather than local manual operation.
28. Maintenance Considerations
Because the drive is a large Frame 8 unit, maintenance planning should focus on both electrical and thermal conditions.
Regular inspection can include:
- Cooling-fan operation.
- Airflow paths.
- Cabinet cleanliness.
- Power-terminal condition.
- Cable connections.
- Grounding connections.
- Network connections.
- Motor-cable condition.
- Fault history.
- Drive operating temperature.
- Abnormal noise or vibration.
Large industrial drives can operate for long periods under heavy loads.
Keeping the cooling system clean and maintaining proper electrical connections can help reduce unexpected downtime.
29. Mechanical Installation Considerations
The approximate 2453 mm height, 600 mm width, and 800 mm depth make this a substantial piece of industrial equipment.
The installation location should provide enough room for the complete cabinet arrangement.
Floor loading is another important consideration because the drive can weigh approximately 620–625 kg.
Suitable lifting equipment should be available for unloading and positioning.
The installation plan should also consider the route from the receiving area to the final installation position.
Doors, corridors, elevators, floor transitions, and equipment access points should be checked before delivery.
30. Electrical Installation Considerations
The electrical installation should be engineered around the drive’s 545 A rating.
Important considerations include:
- Incoming feeder capacity.
- Short-circuit current rating.
- Protective-device coordination.
- Power-cable sizing.
- Motor-cable sizing.
- Grounding.
- Shielding.
- Cable separation.
- Control wiring.
- Network wiring.
- Motor insulation requirements.
- Cabinet ventilation.
The drive’s high current rating means that installation errors can have significant consequences.
All power connections should therefore be performed according to the applicable electrical design and installation requirements.
31. Advantages for Large Conveyor Systems
For large conveyors, controlled acceleration can help reduce mechanical shock.
The drive can provide adjustable motor speed rather than operating the motor continuously at a fixed speed.
This can be useful when the conveyor needs different operating speeds during:
- Startup.
- Normal production.
- Reduced-load operation.
- Process synchronization.
- Maintenance.
- Shutdown.
The high current capacity also provides the capability needed for large conveyor motors when properly matched to the duty rating.
32. Advantages for Pumping Systems
For pumping applications, variable-speed operation can allow motor speed to follow process demand.
Instead of relying exclusively on mechanical throttling, the drive can adjust motor speed electronically.
Potential benefits include:
- Better process control.
- Adjustable flow.
- Adjustable pressure.
- Reduced mechanical stress.
- Easier process coordination.
- Improved operational flexibility.
The actual energy savings and process benefits depend on pump type, system curve, operating point, motor efficiency, and control strategy.
33. Advantages for Fans and Blowers
Large fans and blowers can also benefit from variable-speed control.
The drive can regulate motor speed according to airflow demand.
This can be especially useful in industrial ventilation systems where full-speed operation is not always necessary.
The large-frame drive is suitable for applications where the fan motor is itself a large industrial motor.
34. Advantages for Process Machinery
Industrial process machinery often needs repeatable speed control.
The PowerFlex 755 architecture can provide the control platform required for large motors in process applications.
Typical examples include:
- Mixers.
- Agitators.
- Extrusion equipment.
- Large material-processing machinery.
- Crushers.
- Mills.
- Large production equipment.
The ability to integrate the drive into the automation network also allows process commands and drive feedback to be coordinated.
35. Product Selection Considerations
The 20G1ALD545JN0NNNNN should be selected according to actual motor current and application duty.
The most important selection parameters include:
- Motor voltage.
- Motor full-load current.
- Required horsepower.
- Duty classification.
- Overload requirement.
- Acceleration time.
- Deceleration time.
- Load inertia.
- Required speed range.
- Ambient temperature.
- Installation altitude.
- Cabinet ventilation.
- Communication requirements.
- Braking requirements.
- Local operator-interface requirements.
A motor rated at a particular horsepower should not automatically be paired with a drive simply because the horsepower numbers appear similar.
The actual motor current and application duty are equally important.
36. Detailed Product Specification Table
| Specification | Detailed Information |
|---|---|
| Product Name | PowerFlex 755 AC Drive |
| Model | 20G1ALD545JN0NNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Drive Type | Industrial AC Variable Frequency Drive |
| Voltage | 480 VAC Class |
| Phase | Three Phase |
| Output Current | 545 A |
| Light Duty | 500 HP |
| Normal Duty | 450 HP |
| Heavy Duty | 350 HP |
| Frame Size | Frame 8 |
| Cooling | Forced Air |
| Input | AC Input with Precharge |
| External DC Terminals | None |
| Communication | Embedded EtherNet/IP |
| Protection | Standard |
| Enclosure | Type 1 / IP20 |
| Cabinet Style | MCC Style |
| Cabinet Depth | 800 mm |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Approx. Height | 2453 mm |
| Approx. Width | 600 mm |
| Approx. Depth | 800 mm |
| Approx. Weight | 620–625 kg |
| Primary Use | Large Industrial Motor Control |
| Typical Motors | Large Three-Phase AC Motors |
| Installation | Industrial MCC / Electrical Cabinet |
37. Technical Advantages Summary
| Advantage | Description |
|---|---|
| High Current | 545 A output capacity for large motors |
| High Power | Up to approximately 500 HP LD |
| Large Frame | Frame 8 construction for high-power systems |
| Industrial Communication | Embedded EtherNet/IP |
| Cooling | Forced-air cooling |
| Input Design | AC input with precharge |
| Filtering | Filtered configuration |
| CM Configuration | CM jumper installed |
| Local Interface | No-HIM configuration for centralized control |
| Cabinet Integration | 800 mm deep MCC-style design |
| Application Flexibility | Pumps, fans, conveyors, compressors, process machinery |
| Large Motor Capability | Suitable for hundreds-of-horsepower applications |
| Automation Integration | Suitable for centralized PLC/HMI systems |
38. Product Positioning
The Allen-Bradley 20G1ALD545JN0NNNNN is best described as a large-frame, high-current industrial AC drive for large three-phase motor applications.
Its 545 A capacity places it well above the size range normally associated with compact machine drives.
The combination of Frame 8 construction, 480 VAC three-phase operation, forced-air cooling, embedded EtherNet/IP, filtered input configuration, AC precharge, and 800 mm MCC-style construction makes it suitable for large industrial installations.
The No-HIM configuration also gives the model a particular advantage in centralized automation systems where operators and maintenance personnel interact with the drive through a plant control network rather than through a local display.
39. Final Product Description
The Allen-Bradley 20G1ALD545JN0NNNNN PowerFlex 755 AC Drive is a high-power variable-frequency drive designed for demanding industrial motor-control applications.
The drive operates in the 480 VAC three-phase class and provides a rated output current of 545 A.
Its motor capability reaches approximately 500 HP for Light Duty, 450 HP for Normal Duty, and 350 HP for Heavy Duty, depending on the actual application requirements and duty classification.
The unit uses a Frame 8, air-cooled, forced-air architecture and is configured as an 800 mm deep MCC-style drive.
The specified configuration uses AC input with precharge and no external DC terminals.
The drive also includes embedded EtherNet/IP, allowing it to become part of a modern industrial automation network.
The filtered configuration with the CM jumper installed is suited to industrial installations where electromagnetic compatibility and appropriate common-mode configuration are important design considerations.
Unlike configurations equipped with a local operator module, the requested JN0 configuration is Blank / No HIM.
This makes it particularly suitable for centralized control architectures in which a PLC, HMI, engineering workstation, or plant network handles drive operation and parameter management.
The approximate mechanical envelope is 2453 mm high × 600 mm wide × 800 mm deep, with an approximate weight of 620–625 kg.
Because of its size and weight, the drive requires appropriate mechanical handling, floor support, cabinet ventilation, electrical protection, cable routing, and maintenance access.
Typical applications include large conveyors, pumps, fans, blowers, compressors, mixers, crushers, process machinery, material-handling equipment, and other large industrial motor systems.
The principal advantages of this model are its 545 A current capacity, large motor capability, Frame 8 construction, embedded industrial networking, forced-air cooling, filtered electrical configuration, centralized-control compatibility, and broad application range.
For large industrial installations where a high-capacity AC drive must operate as part of an integrated automation system, the 20G1ALD545JN0NNNNN provides a robust large-frame platform for variable-speed motor control.