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The 20G11LE825JN2NNNNN is a high-power industrial AC variable frequency drive designed for controlling large three-phase AC motors.
It belongs to the PowerFlex 755 product family and is intended for demanding industrial installations where high motor current, variable-speed operation, controlled acceleration and integration with an automation network are required.
The drive has an 825 A current rating and a 600 VAC, three-phase voltage class. Its principal published ratings include 900 HP Normal Duty and 750 HP Heavy Duty.
The unit uses a Frame 9 construction and an 800 mm deep MCC-style enclosure arrangement. It is an air-cooled design intended for large industrial electrical installations.
The specified configuration is particularly appropriate for large motors used in pumps, fans, conveyors, compressors, material-handling equipment and other process machinery.
The JN2 configuration should be regarded as a particular option arrangement within the PowerFlex 755 family rather than as a completely different drive platform. This makes it useful when comparing different option combinations within the same high-power series.
| Item | Specification |
|---|---|
| Brand | Allen-Bradley |
| Product Series | PowerFlex 755 |
| Product Family | PowerFlex 750-Series |
| Product Type | High-Power AC Variable Frequency Drive |
| Model | 20G11LE825JN2NNNNN |
| Construction | Air-Cooled |
| Voltage Class | 600 VAC |
| Phase | Three Phase |
| Rated Current | 825 A |
| Frame | Frame 9 |
| Installation Style | MCC Style |
| Depth | 800 mm |
| Enclosure | Type 1 / IP20 |
| Cooling | Forced Air |
| Communication | Embedded EtherNet/IP |
| Input | AC Input with DC Terminals |
| Filtering | Filtered |
| CM Configuration | CM Jumper Installed |
| Dynamic Braking | None |
| Product Category | Industrial Variable Frequency Drive |
| Parameter | Specification |
|---|---|
| Model | 20G11LE825JN2NNNNN |
| Series | PowerFlex 755 |
| Drive Type | Air-Cooled AC Drive |
| Voltage | 600 VAC |
| Input Phase | 3 Phase |
| Rated Current | 825 A |
| Normal Duty Rating | 900 HP |
| Heavy Duty Rating | 750 HP |
| Frame | Frame 9 |
| Cooling Method | Forced Air |
| Enclosure Type | Type 1 / IP20 |
| Installation | 800 mm Deep MCC Style |
| Depth | 800 mm |
| Width | Configuration-dependent |
| Height | Configuration-dependent |
| Weight (kg) | Configuration-dependent |
| Input Type | AC Input with DC Terminals |
| Communication | Embedded EtherNet/IP |
| EMC / Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| Application | Large Industrial AC Motors |
The 20G11LE825JN2NNNNN is positioned in the high-current section of the PowerFlex 755 range.
Its 825 A rating allows the drive to control very large industrial motors.
The published duty ratings are:
| Duty | Rating |
|---|---|
| Normal Duty | 900 HP |
| Heavy Duty | 750 HP |
| Rated Current | 825 A |
| Voltage Class | 600 VAC |
| Phase | 3 Phase |
The difference between Normal Duty and Heavy Duty is important when selecting a drive.
A motor application with a relatively smooth load may be evaluated using the Normal Duty rating, while a more demanding application with greater torque requirements, overload requirements or difficult starting conditions may need to be evaluated against the Heavy Duty rating.
For final engineering, the motor nameplate current and actual load profile should always take priority over horsepower alone.
The 20G11LE825JN2NNNNN is designed for industrial motor-control systems that require substantially more capacity than a small or medium-sized inverter can provide.
Large motors frequently require high starting current and may operate under significant mechanical loads.
A variable frequency drive provides a controlled method of starting, accelerating, operating and stopping the motor.
Instead of applying full voltage directly to the motor and allowing the motor to accelerate as quickly as the mechanical system permits, the drive can gradually control the motor’s electrical output.
This is particularly valuable in large industrial systems because uncontrolled starting can create considerable mechanical and electrical stress.
The drive can therefore become an important part of the complete process-control system rather than simply functioning as an electronic motor starter.
The 20G11LE825JN2NNNNN belongs to the PowerFlex 755 series.
The PowerFlex 755 family is designed for industrial applications ranging from medium-power machines to very large motor systems.
Within the series, different catalog numbers are created through combinations of:
The 20G11LE825JN2NNNNN represents one of the high-power configurations.
| Configuration Item | Specification |
|---|---|
| Product Family | PowerFlex 755 |
| Current Code | 825 A |
| Voltage Class | 600 VAC |
| Enclosure Arrangement | Type 1 / IP20 |
| Mechanical Depth | 800 mm |
| Frame | Frame 9 |
| Cooling | Air Cooled |
| Input | AC Input with DC Terminals |
| Network | Embedded EtherNet/IP |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| Mounting Style | MCC Style |
The JN2 configuration is therefore best understood as a particular configuration of a common high-power platform.
The catalog description establishes the 800 mm depth for the specified MCC-style configuration.
| Dimension | Specification |
|---|---|
| Depth | 800 mm |
| Width | Configuration-dependent |
| Height | Configuration-dependent |
| Installation Type | MCC Style |
| Frame | Frame 9 |
| Enclosure | Type 1 / IP20 |
| Required Service Space | Installation-dependent |
| Weight (kg) | Configuration-dependent |
The 800 mm depth should be considered during electrical-room planning.
The overall width and height should not be guessed because large-frame equipment can be arranged differently depending on the complete installation package.
For cabinet design, transportation, lifting and floor-loading calculations, the final mechanical drawing should be used.
The weight of a large industrial drive should be treated carefully.
The catalog number identifies the electrical configuration, but the final equipment weight can be influenced by the mechanical package, enclosure arrangement and installed accessories.
| Weight Category | Specification |
|---|---|
| Drive Weight | Configuration-dependent |
| Complete Assembly Weight | Configuration-dependent |
| Shipping Weight | Configuration-dependent |
| Cabinet Weight | Configuration-dependent |
| Weight (kg) | Configuration-dependent |
It is preferable to leave the exact kilogram figure open rather than insert an unverified number.
For transportation and lifting planning, the actual equipment nameplate, final mechanical drawing and shipping documentation should be used.
The 20G11LE825JN2NNNNN uses forced-air cooling.
High-power drives generate heat during operation, particularly when operating large motors at high current.
The forced-air design moves cooling air through the drive to remove heat from the power electronics.
Proper airflow is therefore an important part of installation.
The installation environment should be evaluated for:
The specified configuration is associated with a Type 1 / IP20, 800 mm deep MCC-style arrangement.
This type of construction is intended primarily for controlled industrial electrical environments.
It is particularly suitable for installation in:
Embedded EtherNet/IP is one of the important automation features of the PowerFlex 755 platform.
It allows the drive to participate in a networked industrial control system.
A central controller can exchange operating commands and status information with the drive.
Typical information may include:
| Network Information | Typical Function |
|---|---|
| Start Command | Starts motor operation |
| Stop Command | Stops motor operation |
| Speed Reference | Sets operating speed |
| Actual Speed | Reports motor speed |
| Output Frequency | Reports drive output |
| Motor Current | Provides load information |
| Drive Status | Indicates operating condition |
| Warning Status | Indicates abnormal conditions |
| Fault Status | Reports drive faults |
| Diagnostic Information | Assists maintenance |
Large industrial pumps are one of the most suitable application areas for this type of drive.
A pump motor does not always need to operate at maximum speed.
Process demand can vary throughout the day or production cycle.
The drive can regulate motor speed to better match the actual pumping requirement.
Typical applications include:
Variable-speed control can provide:
Large fans and blowers can require very large motors.
Typical applications include:
The drive allows fan speed to be adjusted according to airflow demand.
This can be more flexible than operating the motor continuously at a fixed speed.
Large conveyors are another important application.
A heavily loaded conveyor can have significant inertia.
Direct starting can produce high mechanical stress in:
The variable-speed drive can provide controlled acceleration.
This can make the startup process smoother and reduce unnecessary mechanical shock.
Large mining equipment frequently requires high-power motor control.
Potential applications include:
The 825 A capacity makes this model suitable for evaluation in large mining installations where the motor current and duty requirements fall within the drive’s applicable rating.
Large compressors can require considerable motor power.
Variable-speed control can allow compressor operation to respond to process requirements.
Potential advantages include:
Crushers can place demanding torque requirements on their motors.
The drive can provide controlled motor operation and networked monitoring.
Potential applications include:
Large industrial mixers can have high starting requirements, particularly when the vessel contains material before startup.
The drive can accelerate the motor in a controlled manner.
This can reduce sudden mechanical loading and improve startup behavior.
Typical applications include:
The drive can be used in large material-handling systems where adjustable speed and high motor capacity are required.
Potential applications include:
The 825 A rating is one of the most important characteristics of the product.
It places this drive in the high-power industrial category.
Large motors can require several hundred amperes, particularly under heavy load.
The high current capacity provides a practical solution for large motor systems.
The product provides a published 900 HP Normal Duty rating and 750 HP Heavy Duty rating.
This allows it to serve substantial industrial machinery.
The final rating must always be selected according to the actual motor and load duty.
The drive allows motor speed to be controlled rather than fixed.
This provides greater process flexibility.
The motor can operate at a speed appropriate to the process instead of always operating at maximum speed.
Large motors and mechanical systems benefit from controlled acceleration.
The drive can progressively increase motor speed.
This can reduce mechanical shock and improve the behavior of large rotating equipment.
Embedded EtherNet/IP provides a convenient way to integrate the drive into an industrial automation system.
This is particularly valuable where many drives are installed throughout a production facility.
Forced-air cooling is suitable for large power electronics.
The design provides a practical way of removing heat generated during high-power operation.
The 800 mm deep MCC-style configuration is appropriate for industrial electrical-room installations.
It is especially relevant where large motor drives are installed together with other motor-control and power-distribution equipment.
Because the drive can communicate with an automation system, operators can manage the motor from a central HMI or control system.
This can reduce the need for local operator interaction at the drive itself.
The specified configuration has no dynamic braking.
This is an important point when selecting the product.
The drive can still control acceleration and deceleration, but applications involving:
may require a separate evaluation of the braking system.
The braking requirement should therefore be considered during system design rather than after the drive has been selected.
The specified configuration includes filtering and an installed common-mode jumper arrangement.
Filtering can be important in installations where electromagnetic compatibility is a concern.
High-power switching equipment should be installed with appropriate attention to:
The drive’s filtering configuration is one part of the complete EMC design.
Large industrial drives require appropriate preventive maintenance.
| Maintenance Area | Recommended Attention |
|---|---|
| Cooling Fans | Check operation |
| Air Passages | Keep unobstructed |
| Cabinet Interior | Inspect for contamination |
| Power Connections | Inspect periodically |
| Grounding | Verify integrity |
| Motor Cables | Inspect insulation and connections |
| Control Wiring | Check for loose connections |
| Network Connections | Monitor communication |
| Fault History | Review repeated faults |
| Ventilation | Confirm adequate airflow |
| Environment | Keep within specified conditions |
The following five models are useful for comparison with the 20G11LE825JN2NNNNN.
They remain within the same high-power PowerFlex 755 family or are closely related configurations.
| Model | Series | Voltage | Current | LD Rating | ND Rating | HD Rating | Depth | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 20G11LE795JN2NNNNN | PowerFlex 755 | 600 VAC | 795 A | 900 HP | 800 HP | 710 HP | 800 mm | Configuration-dependent |
| 20G11LE825JN0NNNNN | PowerFlex 755 | 600 VAC | 825 A | 950 HP | 900 HP | 750 HP | 800 mm | Configuration-dependent |
| 20G11LE825JN4NNNNN | PowerFlex 755 | 600 VAC | 825 A | 950 HP | 900 HP | 750 HP | 800 mm | Configuration-dependent |
| 20G11LE900JN2NNNNN | PowerFlex 755 | 600 VAC | 900 A | 1,000 HP | 950 HP | 800 HP | 800 mm | Configuration-dependent |
| 20G11LE980JN2NNNNN | PowerFlex 755 | 600 VAC | 980 A | 1,100 HP | 1,000 HP | 900 HP | 800 mm | Configuration-dependent |
The 795 A model is useful where a somewhat lower current capacity is sufficient.
The 825 A JN0 and JN4 configurations are especially close to the specified model.
The 900 A and 980 A models provide additional current capacity for larger motor requirements.
The 825 A, 900 A and 980 A models are all represented in the same high-power 600 V PowerFlex 755 family.
| Parameter | 20G11LE795JN2NNNNN |
|---|---|
| Series | PowerFlex 755 |
| Voltage | 600 VAC |
| Current | 795 A |
| Light Duty | 900 HP |
| Normal Duty | 800 HP |
| Heavy Duty | 710 HP |
| Frame | High-Power Frame Configuration |
| Cooling | Forced Air |
| Depth | 800 mm |
| Enclosure | Type 1 / IP20 |
| Communication | Embedded EtherNet/IP |
| Weight (kg) | Configuration-dependent |
This model is suitable when the motor current is below the 825 A requirement.
It can be useful when the application does not require the additional current capacity of the 825 A drive.
| Parameter | 20G11LE825JN0NNNNN |
|---|---|
| Series | PowerFlex 755 |
| Voltage | 600 VAC |
| Current | 825 A |
| Light Duty | 950 HP |
| Normal Duty | 900 HP |
| Heavy Duty | 750 HP |
| Cooling | Forced Air |
| Depth | 800 mm |
| Enclosure | Type 1 / IP20 |
| Input | AC Input with DC Terminals |
| Communication | Embedded EtherNet/IP |
| Weight (kg) | Configuration-dependent |
This is a particularly close comparison because it shares the same 825 A electrical rating.
The primary difference is the option configuration represented by the catalog number.
| Parameter | 20G11LE825JN4NNNNN |
|---|---|
| Series | PowerFlex 755 |
| Voltage | 600 VAC |
| Current | 825 A |
| Light Duty | 950 HP |
| Normal Duty | 900 HP |
| Heavy Duty | 750 HP |
| Cooling | Forced Air |
| Depth | 800 mm |
| Enclosure | Type 1 / IP20 |
| Communication | Embedded EtherNet/IP |
| Weight (kg) | Configuration-dependent |
The JN4 configuration is another closely related option arrangement.
It can be considered when the application requires the same general 825 A high-power platform but a different option package.
| Parameter | 20G11LE900JN2NNNNN |
|---|---|
| Series | PowerFlex 755 |
| Voltage | 600 VAC |
| Current | 900 A |
| Light Duty | 1,000 HP |
| Normal Duty | 950 HP |
| Heavy Duty | 800 HP |
| Cooling | Forced Air |
| Depth | 800 mm |
| Enclosure | Type 1 / IP20 |
| Communication | Embedded EtherNet/IP |
| Weight (kg) | Configuration-dependent |
The 900 A model is appropriate for applications where the motor current approaches or exceeds the practical range of the 825 A drive.
It provides additional current headroom and higher horsepower ratings.
| Parameter | 20G11LE980JN2NNNNN |
|---|---|
| Series | PowerFlex 755 |
| Voltage | 600 VAC |
| Current | 980 A |
| Light Duty | 1,100 HP |
| Normal Duty | 1,000 HP |
| Heavy Duty | 900 HP |
| Cooling | Forced Air |
| Depth | 800 mm |
| Enclosure | Type 1 / IP20 |
| Communication | Embedded EtherNet/IP |
| Weight (kg) | Configuration-dependent |
The 980 A model is the higher-capacity alternative among the five comparison models.
It is more appropriate where the motor has a significantly higher current requirement.
For a broader product comparison, the following models represent different capacity levels within the same industrial-drive portfolio.
| Model | Product Family | Voltage Class | Current / Capacity | Typical Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|---|
| 25B-D010N104 | PowerFlex 525 | 480 VAC class | 10 A class | Small machinery | Configuration-dependent | Configuration-dependent |
| 25B-D017N104 | PowerFlex 525 | 480 VAC class | 17 A class | Small / medium motors | Configuration-dependent | Configuration-dependent |
| 25B-D027N114 | PowerFlex 525 | 480 VAC class | 27 A class | Medium industrial machinery | Configuration-dependent | Configuration-dependent |
| 20F11ND077AA0NNNNN | PowerFlex 753 | 480 VAC class | 77 A class | Medium / large motors | Configuration-dependent | Configuration-dependent |
| 20G11LE825JN2NNNNN | PowerFlex 755 | 600 VAC | 825 A | Large industrial motors | 800 mm depth; other dimensions configuration-dependent | Configuration-dependent |
| Product | Relative Capacity | Typical Use |
|---|---|---|
| 25B-D010N104 | Small | Small machines, conveyors, pumps and fans |
| 25B-D017N104 | Small / Medium | General industrial machinery |
| 25B-D027N114 | Medium | Larger pumps, fans and machinery |
| 20F11ND077AA0NNNNN | Medium / Large | Industrial process equipment |
| 20G11LE825JN2NNNNN | Very Large | Large pumps, fans, conveyors and process machinery |
The 20G11LE825JN2NNNNN becomes particularly attractive when the application has the following characteristics:
| Feature | Conventional Starter | 20G11LE825JN2NNNNN |
|---|---|---|
| Variable Speed | Limited | Yes |
| Controlled Acceleration | Limited | Yes |
| Controlled Deceleration | Limited | Yes |
| Network Communication | Limited | Embedded EtherNet/IP |
| Process Speed Control | Limited | Yes |
| Large Motor Application | Yes | Yes |
| Centralized Monitoring | Limited | Yes |
| Motor Current Monitoring | Limited | Yes |
| Fault Diagnostics | Limited | Advanced drive diagnostics |
| Process Integration | Limited | High |
Starting a very large motor is an important engineering consideration.
A large motor can draw considerable current during startup.
The drive provides controlled motor acceleration instead of relying solely on direct-on-line starting.
This can help reduce:
The drive can become an active component of the production process.
For example, a pump may need to increase speed when pressure falls.
A conveyor may need to reduce speed when material flow decreases.
A fan may need to operate at a lower speed during periods of reduced ventilation demand.
A compressor may need to adjust speed according to process conditions.
In each case, variable-speed operation provides greater flexibility than simple on/off motor control.
The use of a variable frequency drive does not automatically guarantee a particular percentage of energy savings.
Actual savings depend on:
However, applications with variable-speed requirements can benefit substantially from avoiding unnecessary operation at full speed.
This is particularly relevant for centrifugal pumps and fans.
The integrated communication capability makes the drive suitable for a centralized control architecture.
A typical system may include:
PLC → Industrial Network → Drive → Motor
The controller can issue commands to the drive while receiving operating information and diagnostic data.
This allows operators and maintenance personnel to monitor the motor from a centralized location.
| Application | Suitability | Main Reason |
|---|---|---|
| Large Pump | Excellent | High current and variable-speed control |
| Large Fan | Excellent | Variable-speed operation |
| Large Conveyor | Excellent | Controlled acceleration |
| Mining Conveyor | Excellent | High-power motor control |
| Crusher | Good | High-current capability |
| Compressor | Good | Adjustable motor speed |
| Mixer | Good | Controlled starting |
| Material Handling | Excellent | High-power variable-speed operation |
| Process Equipment | Excellent | Networked motor control |
| Small Machine | Poor | Excessive capacity |
Before purchasing or replacing the drive, verify the following information.
| Check Item | Required Information |
|---|---|
| Motor Voltage | Motor nameplate voltage |
| Motor Current | Motor nameplate current |
| Motor HP | Motor rated horsepower |
| Motor Frequency | 50 / 60 Hz as applicable |
| Motor Speed | Rated RPM |
| Load Type | Constant torque / variable torque / other |
| Starting Torque | Required starting torque |
| Duty | Normal / Heavy / Light as applicable |
| Overload | Required overload level |
| Braking | Required stopping performance |
| Environment | Temperature, dust and humidity |
| Installation | MCC / cabinet arrangement |
| Network | EtherNet/IP or other architecture |
| Dimensions | Available installation space |
| Weight (kg) | Confirm final equipment weight |
| Cable Length | Motor cable distance |
| Maintenance | Required access space |
| Category | 20G11LE825JN2NNNNN |
|---|---|
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Product Type | High-Power Air-Cooled AC Drive |
| Voltage Class | 600 VAC |
| Phase | 3 Phase |
| Rated Current | 825 A |
| Normal Duty | 900 HP |
| Heavy Duty | 750 HP |
| Frame | Frame 9 |
| Cooling | Forced Air |
| Enclosure | Type 1 / IP20 |
| Installation Style | MCC Style |
| Depth | 800 mm |
| Width | Configuration-dependent |
| Height | Configuration-dependent |
| Weight (kg) | Configuration-dependent |
| Input | AC Input with DC Terminals |
| Communication | Embedded EtherNet/IP |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| Motor Type | Three-Phase AC Motor |
| Primary Market | Industrial Automation |
| Application Class | Large Motor Control |
| Advantage | Description |
|---|---|
| High Current | 825 A capacity |
| Large Motor Rating | Up to 900 HP Normal Duty |
| Heavy-Duty Capability | 750 HP Heavy Duty |
| Variable Speed | Adjustable motor operation |
| Smooth Start | Controlled acceleration |
| Network Integration | Embedded EtherNet/IP |
| High-Power Cooling | Forced-air cooling |
| Industrial Installation | 800 mm MCC-style construction |
| Large Process Compatibility | Pumps, fans, conveyors and more |
| Centralized Control | Suitable for PLC/HMI architectures |
| Diagnostics | Drive status and fault information |
| Scalable Family | Multiple related current ratings available |
The 20G11LE825JN2NNNNN is a high-power industrial variable frequency drive belonging to the PowerFlex 755 series.
Its 825 A current rating, 600 VAC three-phase electrical class, 900 HP Normal Duty rating and 750 HP Heavy Duty rating make it suitable for very large motor applications.
The drive uses a Frame 9, forced-air-cooled construction and an 800 mm deep MCC-style Type 1 / IP20 enclosure arrangement.
The product is particularly well suited to industrial installations where large motors need adjustable speed, controlled acceleration and centralized automation.
Its embedded EtherNet/IP capability allows the drive to communicate with a larger automation system.
This makes it useful not only as a motor-speed controller but also as part of a complete industrial control architecture.
Typical applications include large pumps, fans, conveyors, compressors, crushers, mixers, mining equipment and bulk-material handling systems.
For pumping and fan applications, variable-speed control can allow the motor to better match actual process demand.
For conveyors and heavy machinery, controlled acceleration can help reduce mechanical stress during startup.
For automated plants, network communication allows operating information, commands and diagnostic information to be exchanged with the control system.
The 20G11LE825JN2NNNNN is therefore best suited to applications where the motor is large enough to require hundreds of amperes and where the process benefits from electronic speed control.
The most important parameters to verify before final selection are the motor nameplate voltage, motor nameplate current, motor horsepower, load type, duty cycle, starting torque, overload requirement, braking requirement and environmental conditions.
For a lower-current alternative, the 20G11LE795JN2NNNNN can be considered.
For an equivalent 825 A electrical class with a different configuration, the 20G11LE825JN0NNNNN and 20G11LE825JN4NNNNN are useful comparison models.
Where additional current capacity is required, the 20G11LE900JN2NNNNN and 20G11LE980JN2NNNNN provide higher-capacity alternatives.
For smaller machines, the PowerFlex 525 and PowerFlex 753 families offer more appropriately sized alternatives.
In summary, the 20G11LE825JN2NNNNN is a high-capacity, industrial-grade AC drive intended for large three-phase motor systems, with a strong combination of high current capability, variable-speed operation, industrial networking and large-motor process control.