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The 20G11BE825JN2NNNNN is a high-power AC variable frequency drive from the PowerFlex 755 series under the Allen-Bradley brand. It is designed for large industrial motors and high-power mechanical equipment where stable speed regulation, controlled acceleration and deceleration, high overload capability, and industrial network integration are required.
This model belongs to the large-frame air-cooled packaged-drive category. It uses a 600 VAC, three-phase input, has an 825 A current rating, and is rated at approximately 950 HP for light-duty operation, 900 HP for normal-duty operation, and 750 HP for heavy-duty operation.
The model is configured as a Frame 9, with a 600 mm deep MCC-style enclosure, forced-air cooling, Type 1 / IP20 protection, AC input with precharge and DC terminals, filtering, and a common-mode jumper installed. It also includes an enhanced LCD, full numeric handheld/local human-machine interface configuration, and embedded EtherNet/IP capability.
The biggest difference worth noting between this model and some other configurations in the same family is the JN2 configuration, which is associated with the particular operator-interface/configuration arrangement of this catalog number. Therefore, even when another PowerFlex 755 model has the same voltage and current rating, it should not automatically be considered an identical replacement.
| Item | Details |
|---|---|
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Product Series | PowerFlex 755 |
| Product Sub-Series | PowerFlex 755 AC Packaged Drive |
| Product Type | High-Power AC Variable Frequency Drive |
| Model | 20G11BE825JN2NNNNN |
| Application Category | Industrial Motor Control |
| Cooling Method | Forced Air / Air Cooled |
| Frame | Frame 9 |
| Installation Style | 600 mm Deep MCC Style |
| Protection | IP20 / Type 1 |
| Input | 600 VAC, 3 Phase |
| Current Class | 825 A |
| Communication | Embedded EtherNet/IP |
| Dynamic Braking | None |
| Filtering | Filtered |
| CM Jumper | Installed |
| Operator Interface | Enhanced LCD, Full Numeric, Handheld/Local HIM |
| Input Configuration | AC Input with Precharge and DC Terminals |
The PowerFlex 755 family is positioned toward high-performance industrial motor control. It covers a wide range of applications, from conventional variable-speed machinery to large and demanding industrial equipment.
The 20G11BE825JN2NNNNN sits near the high-power end of the 600 V portion of this product family. The combination of 825 A current capability and a Frame 9 packaged configuration makes it fundamentally different from compact wall-mounted drives used on smaller motors.
| Parameter | Specification |
|---|---|
| Model | 20G11BE825JN2NNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Product Type | AC Variable Frequency Drive |
| Configuration | 755 AC Packaged Drive |
| Input Voltage | 600 VAC |
| Input Phase | 3 Phase |
| Input Frequency | 47–63 Hz class |
| Input Type | AC Input with Precharge |
| DC Terminals | Included |
| Output Current | 825 A |
| Light-Duty Rating | 950 HP |
| Normal-Duty Rating | 900 HP |
| Heavy-Duty Rating | 750 HP |
| Approx. Normal-Duty Power | 671 kW |
| Approx. Heavy-Duty Power | 560 kW |
| Approx. Light-Duty Power | 708 kW |
| Frame | Frame 9 |
| Cooling | Forced Air / Air Cooled |
| Enclosure | Type 1 |
| IP Rating | IP20 |
| Cabinet Style | 600 mm Deep MCC Style |
| Mechanical Depth | 600 mm |
| Complete External Dimensions | Configuration/drawing dependent |
| Approx. Weight | 1,270.06 kg |
| Dynamic Braking | None |
| Filtering | Filtered |
| CM Configuration | CM Jumper Installed |
| Network | Embedded EtherNet/IP |
| Operator Interface | Enhanced LCD |
| Keypad | Full Numeric |
| HIM | Handheld / Local HIM |
| Motor Control | V/Hz, sensorless/vector-oriented control capabilities within the family |
| Installation Category | High-Power Industrial |
| Typical Motor Size | Hundreds of HP |
| Typical Equipment | Pumps, fans, conveyors, compressors, process machinery |
| Cooling Fan Type | Backward-curved centrifugal type |
| Approx. Fan Airflow | 1,805 m³/h |
| Fan Electrical Input | Approx. 0.45 kW |
| Fan Efficiency | Approx. 63.7% |
The published product description identifies the unit as an 825 A, 600 VAC, three-phase, Frame 9, 600 mm deep MCC-style PowerFlex 755 packaged drive. The three duty ratings are 950 HP light duty, 900 HP normal duty, and 750 HP heavy duty.
Dimension clarification: the catalog configuration identifies the mechanical depth as 600 mm, but 600 mm is not the complete height × width × depth measurement. For cabinet layout, transportation, foundation loading, maintenance clearance, and replacement work, the exact mechanical drawing for the particular packaged configuration should be used.
Weight clarification: the approximately 1,270.06 kg figure should be regarded as the packaged-assembly reference value for planning purposes. Actual shipping or installed weight can vary with cabinet configuration, accessories, and installation arrangement, so the final lifting plan should use the equipment nameplate and applicable mechanical documentation.
The catalog number can be viewed as a series of configuration identifiers rather than simply a random product code.
| Model Segment | General Meaning |
|---|---|
| 20G | PowerFlex 755 drive family |
| 11 | Packaged-drive configuration |
| B | 600 V-class packaged configuration |
| E | Electrical / enclosure configuration |
| 825 | 825 A current class |
| J | Particular high-power packaged-drive configuration |
| N2 | Operator-interface / configuration option |
| NNNNN | Additional option positions / factory configuration |
The most useful identification point for engineering and purchasing purposes is the combination of 20G + 825 + JN2.
The 825 portion identifies the current class, while the complete suffix is necessary to distinguish the actual factory configuration.
This is particularly important for large industrial drives because two models that appear almost identical may have different enclosure arrangements, operator interfaces, filtering, braking arrangements, communications, or other options.
The 20G11BE825JN2NNNNN is designed for applications in which a large AC motor needs accurate and controllable variable-speed operation.
A conventional fixed-speed motor normally runs according to the frequency and voltage of the incoming power system. A variable frequency drive changes the electrical output supplied to the motor, allowing the motor’s speed and torque to be controlled according to process requirements.
For a small motor, this task can be handled by a relatively compact drive. For a motor approaching several hundred horsepower, however, the drive becomes a substantial electrical installation in its own right.
This is where the 20G11BE825JN2NNNNN is positioned.
With an 825 A output-current class, the unit is intended for large industrial motors. Its 600 VAC three-phase input and Frame 9 construction are intended for large electrical systems where a compact drive enclosure would not be appropriate.
The packaged configuration is also useful because the drive is supplied as an engineered high-power assembly rather than as a small standalone drive module. This approach is particularly practical for MCC-based industrial installations.
The forced-air cooling system is important at this power level. A drive operating at hundreds of kilowatts generates significant heat, and controlled airflow is necessary to keep the power electronics within their operating temperature range.
The model also provides embedded EtherNet/IP connectivity, making it suitable for modern industrial control architectures where the drive is expected to exchange commands, status information, alarms, and diagnostic information with the automation system.
The main function is to control the speed of a large AC motor.
Instead of running the motor at one fixed speed, the drive can adjust output frequency and voltage to change the motor operating point.
This is useful when the machine does not need to operate at full speed all the time.
For example, a large pump may only need 70% of its maximum flow for a particular production period. A large fan may need different airflow during different stages of a process. A conveyor may need different speeds depending on the amount of material being transported.
The drive allows these changes to be handled electrically rather than relying entirely on mechanical methods.
Large motors can create significant electrical and mechanical stress when started directly across the line.
A variable frequency drive can gradually increase motor speed.
This controlled acceleration can reduce mechanical shock to gearboxes, shafts, couplings, belts, chains, pumps, fans, and other connected machinery.
It can also make the entire production system smoother during startup.
The same principle applies when stopping the motor.
Instead of abruptly removing power and allowing the machine to coast unpredictably, the drive can manage the deceleration process.
The exact stopping behavior depends on the application, motor inertia, load characteristics, and whether a braking system is required.
This particular catalog configuration does not include dynamic braking.
Large pumps are one of the most natural applications for a high-power variable frequency drive.
A pump system rarely needs maximum flow at every moment. With variable-speed control, the pump can be operated closer to the actual process demand.
Typical applications include:
For centrifugal pumps, speed reduction can provide significant energy savings because pump power changes strongly with speed.
Industrial fans and blowers frequently operate at different airflow requirements throughout the production cycle.
A variable frequency drive can change fan speed according to actual demand.
Typical examples include:
The large current rating makes this model suitable for applications where the fan motor is several hundred horsepower.
Large conveyors can require substantial motor power, especially in mining, bulk handling, ports, cement plants, steel plants, and other heavy industries.
Variable-speed control can provide a smoother startup.
This is especially useful when a conveyor contains a large quantity of material at startup. Instead of applying full motor torque immediately, the drive can control acceleration in a more gradual manner.
This can reduce stress on belts, couplings, gearboxes, shafts, and other mechanical components.
Large compressors can place significant demands on their motors.
Variable-speed control can help match compressor output to process requirements.
Potential applications include industrial air systems, process gas systems, refrigeration-related equipment, and other large compression systems.
The correct selection must take compressor torque characteristics, starting requirements, overload behavior, and motor nameplate current into account.
Crushers, mills, grinders, mixers, and other heavy process equipment can require high starting torque and considerable continuous motor power.
The PowerFlex 755 platform is suitable for applications where motor speed and torque need to be managed rather than simply switched on and off.
For these applications, the motor current and actual load profile should be considered carefully when determining whether the 825 A model is appropriate.
Mining operations commonly use very large motors for:
The 20G11BE825JN2NNNNN is well suited to the power range encountered in these environments.
Its large physical size, however, means that mechanical installation, ventilation, lifting, cable routing, and service access must all be considered during project design.
The most important characteristic is the 825 A output-current rating.
This places the drive firmly in the high-power industrial category.
It is designed for large motors rather than general-purpose small machinery.
The product provides three useful power-rating references:
| Duty Category | Rating |
|---|---|
| Light Duty | 950 HP |
| Normal Duty | 900 HP |
| Heavy Duty | 750 HP |
This gives engineers more flexibility when matching the drive to the actual load.
The heavy-duty rating is lower than the normal-duty rating because heavy-duty applications generally require greater overload capability and more demanding operating conditions.
Embedded EtherNet/IP provides a convenient method for connecting the drive to an industrial automation network.
This allows the control system to exchange information such as:
This is particularly valuable in large plants where drives are integrated into centralized control systems.
The 600 mm deep MCC-style arrangement makes the drive suitable for large industrial electrical installations.
For projects with multiple high-power drives, a packaged arrangement can make cabinet planning and equipment organization easier.
High-power drives require effective thermal management.
The forced-air cooling arrangement is designed to move substantial quantities of air through the drive.
This is important because power semiconductor devices, DC bus components, magnetic components, and other electrical parts generate heat during operation.
The JN2 configuration includes an enhanced LCD and full numeric handheld/local HIM arrangement.
This makes local setup, monitoring, troubleshooting, and parameter adjustment more convenient compared with a configuration without a suitable operator interface.
For commissioning and maintenance personnel, having a local interface can be particularly useful when the network or central control system is not available.
The unit uses a filtered configuration with the CM jumper installed.
This is useful in installations where electrical noise and common-mode effects need to be considered.
Large industrial plants can contain many variable frequency drives, motors, instrumentation devices, communication networks, PLC systems, and other electrical equipment. Managing electromagnetic interference is therefore an important part of overall system design.
The following models are suitable for comparison because they belong to the same high-power PowerFlex 755 packaged-drive range or are closely related catalog configurations.
| Recommended Model | Series | Voltage Class | Current | Light Duty | Normal Duty | Heavy Duty | Dimensions | Weight (kg) | Main Difference |
|---|---|---|---|---|---|---|---|---|---|
| 20G11BE760JN2NNNNN | PowerFlex 755 | 600 VAC | 760 A | Lower than 825 A class | Lower than target | Lower than target | 600 mm depth class | Configuration dependent | Lower-current alternative |
| 20G11BE825JN0NNNNN | PowerFlex 755 | 600 VAC | 825 A | 950 HP class | 900 HP class | 750 HP class | 600 mm depth class | Approx. 1,270 kg class | Same current, different configuration |
| 20G11BE825JN4NNNNN | PowerFlex 755 | 600 VAC | 825 A | 950 HP class | 900 HP class | 750 HP class | 600 mm depth class | Configuration dependent | Same current, alternative configuration |
| 20G11BE900JN2NNNNN | PowerFlex 755 | 600 VAC | 900 A | Approx. 1000 HP class | Approx. 950 HP class | Approx. 800 HP class | 600 mm depth class | Configuration dependent | Higher-current alternative |
| 20G11BE980JN2NNNNN | PowerFlex 755 | 600 VAC | 980 A | Approx. 1050 HP class | Approx. 1000 HP class | Approx. 900 HP class | Large Frame 9 class | Configuration dependent | Higher-capacity alternative |
The 760 A, 825 A, 900 A, and 980 A configurations are all useful comparison points when selecting a high-power 600 V drive. Catalog listings also show the 825 A and 900 A families with multiple JN0/JN2/JN4 configuration variants.
The 20G11BE825JN0NNNNN is particularly close to the target because it retains the same 825 A class but uses a different configuration suffix.
The 20G11BE900JN2NNNNN is worth considering where additional current capacity is needed.
The 20G11BE760JN2NNNNN is a logical alternative where the motor’s actual rated current is lower than 825 A.
Dimension and weight note: the exact height, width, and packaged weight of these related catalog numbers depend on the particular packaged configuration. The 600 mm figure represents the specified enclosure depth rather than the complete external dimensions. Where a reliable catalog weight is not established, it is deliberately shown as configuration-dependent rather than inventing a number.
For a broader product selection, the following models can be considered when the application does not necessarily require an 825 A high-power drive.
| Model | Product Series | Typical Voltage Class | Current / Power Class | Main Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|
| 25B-D024N104 | PowerFlex 525 | 480 VAC class | Approx. 24 A | Small and medium machines | Compact frame; frame dependent | Approx. 4–8 kg class |
| 20F11NC072JA0NNNNN | PowerFlex 753 | 480 VAC class | Approx. 72 A class | General industrial machinery | Frame dependent | Approx. 20–40 kg class |
| 20G11NC072JA0NNNNN | PowerFlex 755 | 480 VAC class | Approx. 72 A class | High-performance machinery | Frame dependent | Approx. 20–40 kg class |
| 20G11BE825JN2NNNNN | PowerFlex 755 | 600 VAC | 825 A / 900 HP ND | Very large industrial equipment | 600 mm depth, Frame 9 | Approx. 1,270.06 kg |
| 20G11BE900JN2NNNNN | PowerFlex 755 | 600 VAC | 900 A class | Large industrial motors | 600 mm depth class | Configuration dependent |
The smaller models are fundamentally different from the 20G11BE825JN2NNNNN in physical size and power level.
They are useful when the application requires a smaller motor drive, while the 20G11BE825JN2NNNNN is intended for very large industrial motors.
For a replacement project, selecting a model solely because it belongs to the same brand is not sufficient. Motor voltage, motor full-load current, overload requirement, duty cycle, braking requirement, enclosure, communication options, and physical dimensions must all be checked.
| Model | Voltage | Current | LD | ND | HD | Depth | Weight (kg) | Suitable Application |
|---|---|---|---|---|---|---|---|---|
| 20G11BE760JN2NNNNN | 600 VAC | 760 A | High-power | High-power | High-power | 600 mm class | Configuration dependent | Large pumps, fans, conveyors |
| 20G11BE825JN0NNNNN | 600 VAC | 825 A | 950 HP | 900 HP | 750 HP | 600 mm | Approx. 1,270 kg class | Very large motors |
| 20G11BE825JN2NNNNN | 600 VAC | 825 A | 950 HP | 900 HP | 750 HP | 600 mm | Approx. 1,270.06 kg | Target model |
| 20G11BE825JN4NNNNN | 600 VAC | 825 A | 950 HP | 900 HP | 750 HP | 600 mm class | Configuration dependent | Alternative 825 A configuration |
| 20G11BE900JN2NNNNN | 600 VAC | 900 A | 1000 HP class | 950 HP class | 800 HP class | 600 mm class | Configuration dependent | Higher-current applications |
The 825 A family is particularly useful where the motor is close to the upper limit of the 825 A class.
If the motor’s full-load current is comfortably below this level, a smaller model may provide a more economical installation.
If the motor current or overload demand approaches the drive’s limit, moving to the 900 A class can provide additional capacity, subject to the motor and system requirements. The published 900 A PowerFlex 755 configuration is associated with approximately 1000 HP LD, 950 HP ND, and 800 HP HD ratings.
The 20G11BE825JN2NNNNN is particularly relevant to industries where large motors operate continuously or where controlled speed is important.
| Industry | Typical Equipment | Why a High-Power VFD Is Useful |
|---|---|---|
| Mining | Conveyors, crushers, pumps, fans | High power and controlled starting |
| Cement | Fans, conveyors, mills, pumps | Process control and large motors |
| Steel | Fans, pumps, conveyors, processing lines | High torque and continuous operation |
| Water Treatment | Large pumps and blowers | Flow control and energy management |
| Chemical Processing | Pumps, fans, compressors | Process stability |
| Oil & Gas | Pumps, compressors, fans | Variable process demand |
| Power Generation | Pumps, fans, auxiliaries | Speed and process control |
| Manufacturing | Large process machinery | Flexible speed control |
| Bulk Material Handling | Conveyors and feeders | Smooth acceleration |
| HVAC / Industrial Cooling | Large fans and pumps | Demand-based operation |
One of the strongest reasons for using a variable frequency drive on large pumps and fans is the possibility of reducing energy consumption.
A motor running continuously at full speed can consume considerable electrical power even when the process does not need maximum output.
With variable-speed operation, the motor speed can be reduced when demand decreases.
This can be particularly effective for centrifugal pumps and fans because their power consumption decreases significantly as speed is reduced.
For a motor in the several-hundred-horsepower range, even a modest reduction in operating speed can represent a meaningful reduction in electrical consumption.
The actual savings, however, depend on the mechanical system, process requirements, operating hours, motor efficiency, pump or fan characteristics, and control strategy.
The large physical size and high electrical capacity of the 20G11BE825JN2NNNNN mean that maintenance should be approached as a planned industrial activity rather than as routine small-drive servicing.
Cooling airflow is one of the first areas that should receive attention.
Dust accumulation, blocked air paths, degraded fans, or abnormal ventilation can increase operating temperature.
The drive’s fan system is therefore an important maintenance item.
Electrical connections should also be inspected according to the applicable maintenance program.
Large current levels mean that poor electrical connections can produce significant heat.
The enclosure should be kept in suitable condition, and the environment should be assessed for excessive dust, humidity, corrosive substances, and other contaminants.
Drive alarms and fault history can also provide useful information for preventive maintenance.
If abnormal current, temperature, fan behavior, DC bus conditions, or repeated faults are observed, the underlying cause should be investigated rather than simply resetting the drive repeatedly.
Because the product weighs approximately 1,270.06 kg, transportation and installation require considerably more planning than a conventional compact VFD.
The following areas should be considered:
| Installation Item | Main Consideration |
|---|---|
| Floor Loading | Verify that the supporting structure can handle the packaged weight |
| Lifting | Use suitable lifting equipment and an approved lifting procedure |
| Cabinet Clearance | Provide adequate working and service space |
| Ventilation | Maintain sufficient airflow around the forced-air cooling system |
| Cable Routing | Plan high-current input and motor cable routing carefully |
| Grounding | Provide appropriate protective and equipment grounding |
| EMC | Consider motor cable routing and electrical-noise management |
| Ambient Temperature | Keep the installation environment within the applicable operating range |
| Dust | Avoid excessive contamination of cooling paths |
| Maintenance | Leave enough room for inspection and component replacement |
| Transportation | Confirm dimensions and center of gravity before moving the unit |
| Foundation | Verify mounting and anchoring requirements |
The 600 mm depth should also be included in the mechanical design.
However, engineers should not treat 600 mm as the complete product envelope. The actual height and width must be taken from the applicable dimension drawing for the exact packaged configuration.
There are several reasons this model fits large industrial installations well.
First, the 825 A current rating provides substantial motor capacity.
Second, the unit supports multiple duty ratings, allowing the same drive class to be considered for different load conditions.
Third, the 600 VAC three-phase configuration is suitable for large industrial power systems.
Fourth, the Frame 9 packaged construction is designed around high-power equipment rather than compact machine-level drives.
Fifth, the embedded EtherNet/IP interface allows the drive to participate in a larger automation system.
Sixth, the local HIM provides a practical interface for commissioning and maintenance.
Finally, the forced-air cooling arrangement provides the thermal-management capability required by a high-power drive.
| Item | Fixed-Speed Starter | 20G11BE825JN2NNNNN |
|---|---|---|
| Motor Starting | Direct / stepped | Controlled acceleration |
| Speed Control | Limited | Variable |
| Process Adjustment | Limited | Flexible |
| Acceleration Control | Limited | Adjustable |
| Deceleration Control | Limited | Adjustable |
| Network Integration | Usually requires additional equipment | Embedded EtherNet/IP |
| Local Drive Interface | Limited | Enhanced LCD / HIM |
| Energy Optimization | Limited | Strong potential for suitable loads |
| Large Motor Application | Possible | Specifically suited to high-power applications |
| Diagnostic Information | Basic | Extensive drive-level monitoring |
| Mechanical Shock | Potentially higher | Can be reduced through controlled acceleration |
The main benefit is not simply “more control.” It is the ability to match motor operation to the actual mechanical process.
When deciding whether the 20G11BE825JN2NNNNN is the correct model, the first item to check is the motor nameplate.
The motor’s rated voltage should match the drive’s output capability.
The motor’s full-load current should be compared against the drive’s applicable current rating.
The load type should then be identified.
A centrifugal fan or pump may have very different requirements from a crusher, conveyor, hoist, or mixer.
The next consideration is duty.
If the equipment experiences repeated overloads, high starting torque, rapid acceleration, or severe cyclic loading, the heavy-duty rating should receive particular attention.
The physical installation is also important.
An approximately 1,270 kg packaged drive requires suitable floor loading, transportation equipment, lifting arrangements, and maintenance space.
For a replacement, the complete catalog number should be matched rather than simply replacing an “825 A PowerFlex 755” with another 825 A drive.
The 20G11BE825JN2NNNNN is a very high-power industrial AC variable frequency drive designed for large three-phase motors.
Its key specifications are:
These characteristics make the model particularly suitable for large pumps, fans, conveyors, compressors, mining equipment, process machinery, material-handling systems, and other applications where motor power can reach several hundred horsepower.
The most important advantage is its combination of high current capacity and industrial control flexibility.
It is not a small general-purpose inverter. It is a large engineered drive intended for major industrial equipment, and the installation should be planned accordingly.
For applications requiring slightly less current, the 760 A version is worth considering.
For applications requiring approximately the same motor current but a different option configuration, the 825 A JN0 or JN4 variants are useful comparison points.
Where additional current capacity is required, the 900 A version provides a logical step upward.
For smaller motors, the PowerFlex 753, PowerFlex 755 lower-current configurations, or compact PowerFlex 525 class can be more appropriate.
In short, 20G11BE825JN2NNNNN is best understood as a high-capacity, high-performance, packaged industrial drive for very large motors, with the physical size, current capacity, network connectivity, and control functions expected from equipment intended for large-scale industrial installations.