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The Allen-Bradley 20G1AGD248AN0NNNNN is a high-power industrial AC variable-frequency drive belonging to the PowerFlex 755 family.
This model is designed for demanding motor-control applications where substantial motor power, adjustable-speed operation, controlled acceleration and deceleration, and reliable industrial operation are required.
The drive is rated for a 480 VAC, three-phase power system and provides a rated current of 248 A. Its published motor capability is approximately 200 HP for Normal Duty operation and 150 HP for Heavy Duty operation. The unit is identified as a Frame 7 PowerFlex 755 drive.
The model uses an AC input with precharge and no DC terminals, a configuration intended for conventional AC-powered drive installations. It is also an air-cooled design using forced-air cooling.
The original 20G1AGD248AN0NNNNN has reached discontinued status, with 20G1AGD248JN0NNNNN identified as its direct replacement. This is particularly important when preparing a new project, replacing an existing drive, or planning spare inventory.
For maintenance of existing equipment, however, the original catalog number remains important because the installed unit, parameter configuration, firmware revision, accessories, mounting arrangement, and application-specific programming may all need to be considered before selecting a replacement.
| Item | Description |
|---|---|
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Product Series | PowerFlex 755 |
| Product Type | Industrial AC Variable Frequency Drive |
| Catalog Number | 20G1AGD248AN0NNNNN |
| Drive Category | High-performance AC drive |
| Cooling Method | Forced-air cooled |
| Voltage Class | 480 VAC |
| Input Phase | 3-phase |
| Rated Current | 248 A |
| Normal Duty Rating | 200 HP |
| Heavy Duty Rating | 150 HP |
| Frame | Frame 7 |
| Enclosure | Type 12 / IP54 packaged configuration |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Input Configuration | AC input with precharge, no DC terminals |
| Filtering | EMC/filtering configuration |
| Application Class | Industrial motor control |
The PowerFlex 755 family is positioned for applications requiring more flexibility and performance than a basic general-purpose variable-frequency drive. It is commonly associated with larger motors and machinery such as pumps, fans, conveyors, material-handling equipment, and other industrial rotating machinery.
| Parameter | Specification |
|---|---|
| Model / Catalog Number | 20G1AGD248AN0NNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 755 |
| Drive Type | AC Variable Frequency Drive |
| Rated Input Voltage | 480 VAC |
| Voltage Class | 480 VAC |
| Number of Phases | 3-phase |
| Rated Current | 248 A |
| Normal Duty Power | 200 HP |
| Normal Duty Power, Approx. | 150 kW |
| Heavy Duty Power | 150 HP |
| Heavy Duty Power, Approx. | 112 kW |
| Frame Size | Frame 7 |
| Cooling | Forced Air |
| Input Type | AC input with precharge |
| DC Terminals | No DC terminals |
| Enclosure | Type 12 / IP54 |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Filtering | Filtered configuration |
| Motor Control | Variable-speed AC motor control |
| Installation Type | Industrial panel / packaged drive installation |
| Typical Frequency | 50/60 Hz supply systems |
| Normal Operating Temperature | Approximately 0–50 °C, depending on installation conditions and configuration |
| Approximate Width | 500–600 mm |
| Approximate Height | 800–1000 mm |
| Approximate Depth | 400–500 mm |
| Approximate Weight | 100–160 kg |
| Cooling Airflow | Forced-air |
| Intended Environment | Industrial |
| Typical Applications | Pumps, fans, conveyors, process machinery, material handling, industrial production equipment |
The 248 A current rating and 200 HP / 150 HP duty ratings are consistent with the published catalog description for this model.
The dimensional and weight values above should be treated as engineering planning estimates rather than certified mechanical drawing values. For final cabinet design, shipping calculations, lifting arrangements, and mounting-hole preparation, the applicable mechanical drawing for the exact drive revision should be used.
The 248 A rating is one of the most important specifications of this drive.
This places the 20G1AGD248AN0NNNNN in a relatively high-power segment of the PowerFlex 755 family. The drive is intended for applications requiring considerably more output current than compact drives used for small motors.
The current rating is also useful when selecting a replacement drive. A replacement should not be selected solely according to motor horsepower. Motor full-load current, duty cycle, overload requirement, acceleration profile, ambient conditions, and application type should all be considered.
For example, a motor listed as 200 HP does not automatically mean that every 200 HP drive is interchangeable. The actual motor nameplate current and the required overload capability should be checked against the drive’s applicable duty rating.
The 20G1AGD248AN0NNNNN is specified for:
The distinction between Normal Duty and Heavy Duty is important in industrial drive selection.
Normal Duty is generally associated with applications where the motor load profile and overload requirements are comparatively moderate.
Heavy Duty operation is more demanding. Applications with higher starting torque, frequent acceleration, high inertia, repeated overload conditions, or significant transient loading may require the Heavy Duty rating.
Therefore, a 200 HP motor operating under a relatively light or moderate load may be suitable for the Normal Duty rating, while a lower-horsepower motor in a severe-duty application may require a drive selected according to the Heavy Duty rating.
For engineering selection, the motor nameplate current and actual load profile should take priority over horsepower alone.
The drive is designed for a 480 VAC, three-phase industrial power system.
This voltage class is widely used for large industrial motors and machinery.
A three-phase input configuration provides the appropriate power architecture for high-power motor-control applications and allows the drive to regulate motor speed and torque through variable-frequency operation.
The 480 VAC rating also places the model in a different application category from smaller low-voltage drives used for compact machinery.
When installing the drive, incoming voltage, short-circuit current availability, protective devices, conductor sizing, grounding, disconnect requirements, and local electrical regulations must all be evaluated.
The 20G1AGD248AN0NNNNN uses an AC input with precharge and no DC terminals.
The precharge arrangement is an important part of the drive’s input architecture.
Precharge limits the initial charging current associated with the drive’s DC bus capacitors when power is applied. This helps control the electrical stress associated with energizing the drive.
The catalog configuration does not provide standard external DC terminals for the drive’s normal installation arrangement.
This characteristic should be considered when comparing the unit with another PowerFlex 755 configuration because visually similar catalog numbers may have different input architectures.
The 20G1AGD248AN0NNNNN is a Frame 7 PowerFlex 755 drive.
Frame size is important because it affects:
Two drives with similar current ratings may not necessarily have the same physical frame.
Therefore, frame size should always be checked before replacing an existing drive.
The 20G1AGD248AN0NNNNN is specifically identified as Frame 7 in published product descriptions.
The packaged configuration associated with this catalog number is identified as Type 12 / IP54.
This provides considerably more environmental protection than an open-frame drive configuration.
An IP54 enclosure classification generally indicates protection against hazardous dust deposits and protection against water splashing from different directions.
The Type 12 configuration is particularly useful for industrial environments where the drive needs additional enclosure protection compared with an open-type installation.
Even with an IP54 / Type 12 enclosure, the installation environment must still be evaluated carefully.
Temperature, humidity, corrosive chemicals, conductive dust, vibration, airflow, and contamination can all affect drive reliability.
The PowerFlex 755 248 A drive uses forced-air cooling.
At this power level, heat dissipation is a major engineering consideration.
Power semiconductor losses, switching losses, internal electronics losses, and other heat sources generate thermal energy during operation.
Forced-air cooling moves air through the appropriate cooling path to transfer heat away from the power components.
For cabinet installation, sufficient ventilation and service clearance are essential.
A cabinet that is too small, has insufficient airflow, or operates at excessive ambient temperature can significantly reduce equipment reliability.
The 20G1AGD248AN0NNNNN is specified with no dynamic braking.
This is an important distinction when comparing it with other catalog-number variants.
Dynamic braking is typically used when a motor-driven load needs controlled deceleration and the regenerated energy must be dissipated through a braking resistor arrangement.
Because this particular model is specified without dynamic braking, applications involving rapid stopping, high-inertia loads, or frequent deceleration should be reviewed carefully.
For high-inertia machinery, the engineer should determine whether the selected drive configuration provides an adequate braking strategy.
Depending on the application, controlled ramp-down, mechanical braking, regenerative solutions, or another braking architecture may be required.
The catalog configuration specifies a Blank / No HIM arrangement.
HIM refers to the Human Interface Module.
A drive without a permanently installed HIM is often used in systems where:
This configuration can also reduce unnecessary hardware on the drive door.
For service work, a compatible interface or commissioning method may be used depending on the maintenance strategy.
The PowerFlex 755 family is designed for integration into industrial automation architectures.
The broader PowerFlex 755 platform supports network-based control and monitoring, including EtherNet/IP-based integration options and motion-related capabilities.
This makes the drive suitable for systems where the VFD is not operating as an isolated device but is part of a larger automation network.
Typical network functions can include:
This is especially valuable in automated production lines where the drive must exchange information with PLCs, HMIs, supervisory systems, or other intelligent devices.
The 20G1AGD248AN0NNNNN is well suited to large pump applications.
Variable-speed operation allows the motor speed to be adjusted according to process requirements rather than continuously operating at fixed speed.
Potential applications include:
For centrifugal pumps, speed control can provide substantial process flexibility.
Large industrial fans and blowers are another suitable application category.
The drive can provide controlled acceleration, adjustable speed, and controlled stopping.
Potential installations include:
Conveyors can benefit from variable-frequency control because the drive can control acceleration and operating speed.
Typical applications include:
Controlled acceleration can also help reduce mechanical shock on belts, couplings, gearboxes, and driven machinery.
The drive is suitable for larger material-handling systems where adjustable speed and controlled motor operation are required.
Examples include:
The exact drive configuration should be selected according to the load torque profile and stopping requirements.
The PowerFlex 755 platform is suitable for large production machinery where precise motor speed control and integration with a plant automation system are required.
Potential applications include:
The drive can also be used in process-oriented industrial facilities.
Typical areas include:
In these applications, the ability to integrate the drive into a larger control system can simplify centralized operation and diagnostics.
The 248 A output rating provides substantial motor-control capacity.
With a 200 HP Normal Duty rating, the drive is suitable for large industrial motors rather than small machine loads.
This makes it appropriate for heavy industrial equipment where smaller VFDs would not provide sufficient current capacity.
The PowerFlex 755 architecture is designed for a wide range of industrial applications.
Instead of being restricted to one particular machine type, the platform can be configured for pumps, fans, conveyors, process machinery, and other rotating equipment.
This flexibility can simplify standardization across an industrial facility.
The Type 12 / IP54 configuration provides a more protected installation arrangement than an open-type drive.
This can be valuable in industrial environments where dust and incidental water exposure are concerns.
The 200 HP Normal Duty / 150 HP Heavy Duty rating provides a practical combination for large industrial motors.
The drive can be applied to equipment requiring substantial torque and power while still providing variable-speed operation.
The PowerFlex 755 platform supports industrial network integration.
This allows the drive to participate in a broader automation system rather than functioning as an isolated motor controller.
Centralized control and monitoring can improve machine diagnostics and maintenance efficiency.
A VFD can gradually increase motor speed instead of applying full-speed operation immediately.
This can reduce mechanical shock and improve the starting behavior of large machines.
Potential benefits include reduced belt stress, reduced coupling shock, improved process control, and smoother machine operation.
The drive can also provide controlled speed reduction.
For applications where mechanical stress during stopping is important, programmed deceleration can be preferable to abrupt motor shutdown.
However, because this particular catalog configuration does not include dynamic braking, high-inertia applications should be reviewed carefully.
For facilities operating many PowerFlex drives, using the same product family can simplify:
This can be particularly valuable in large industrial plants.
Installation of the 20G1AGD248AN0NNNNN should be planned around the electrical and thermal requirements of a high-power VFD.
Important considerations include:
The motor should not be selected based only on horsepower.
The following information should be reviewed:
| Motor Parameter | Recommended Check |
|---|---|
| Motor Voltage | Must match the drive application |
| Motor Current | Must be within the applicable drive rating |
| Motor Power | Compare with ND/HD rating |
| Motor Frequency | Confirm required operating frequency |
| Motor Speed | Confirm required speed range |
| Motor Service Factor | Consider during sizing |
| Starting Torque | Evaluate application requirement |
| Load Torque | Determine constant or variable torque |
| Inertia | Important for acceleration/deceleration |
| Duty Cycle | Check continuous and intermittent loading |
| Braking Requirement | Important because this model has no dynamic braking |
| Motor Cable Length | Check installation requirements |
| Motor Insulation | Consider VFD-duty suitability |
This approach is particularly important for large motors because an apparently suitable horsepower rating can still result in an undersized drive if the actual motor current or overload demand is too high.
Because mechanical dimensions can vary according to enclosure configuration, revision, accessories, and mounting arrangement, the following figures should be used for preliminary planning only.
| Mechanical Parameter | Approximate Value |
|---|---|
| Frame | Frame 7 |
| Width | Approx. 500–600 mm |
| Height | Approx. 800–1000 mm |
| Depth | Approx. 400–500 mm |
| Approximate Weight | 100–160 kg |
| Installation | Panel / industrial enclosure |
| Cooling | Forced Air |
| Enclosure | Type 12 / IP54 |
The exact shipping weight and mechanical envelope should be verified against the specific mechanical drawing for the unit being installed.
This is especially important when designing a cabinet because even a relatively small difference in drive depth can affect cable bending radius, ventilation space, door clearance, and maintenance access.
The following models are useful comparison points within the PowerFlex 755 family or closely related configurations.
| Model | Voltage Class | Current | Normal Duty | Heavy Duty | Frame / Configuration | Typical Use |
|---|---|---|---|---|---|---|
| 20G1AGD186AN0NNNNN | 480 VAC | 186 A | 150 HP | 125 HP | Frame 6/7 class | Medium-large industrial motors |
| 20G1AGD248AN0NNNNN | 480 VAC | 248 A | 200 HP | 150 HP | Frame 7 | Large industrial motors |
| 20G1AGD302AN0NNNNN | 480 VAC | 302 A | 250 HP | 200 HP | Frame 7 | Larger pumps, fans, conveyors |
| 20G1AGD361AN0NNNNN | 480 VAC | 361 A | 300 HP | 250 HP | Frame 7 | Large process equipment |
| 20G1AGD415AN0NNNNN | 480 VAC | 415 A | 350 HP | 300 HP | Frame 7 class | Very large industrial loads |
The 248 A model sits in a useful middle position within this 480 V PowerFlex 755 rating range. Published selection information places the nearby models at 186 A, 248 A, 302 A, 361 A and 415 A, with corresponding horsepower ratings increasing with current capacity.
When moving from the 248 A model to a larger rating, the mechanical frame, cabinet requirements, input protection, motor cable sizing, and thermal requirements should all be rechecked rather than assuming a direct physical replacement.
| Model | Current | Normal Duty | Heavy Duty | Relative Position |
|---|---|---|---|---|
| 20G1AGD186AN0NNNNN | 186 A | 150 HP | 125 HP | Lower capacity |
| 20G1AGD248AN0NNNNN | 248 A | 200 HP | 150 HP | Reference model |
| 20G1AGD302AN0NNNNN | 302 A | 250 HP | 200 HP | Higher capacity |
| 20G1AGD361AN0NNNNN | 361 A | 300 HP | 250 HP | High capacity |
| 20G1AGD415AN0NNNNN | 415 A | 350 HP | 300 HP | Very high capacity |
For a replacement project, the 248 A model should generally be compared first with the 186 A and 302 A versions because they are adjacent capacity steps.
The following models represent other widely used Allen-Bradley drive choices and are useful when selecting a drive family for different machine sizes.
| Model | Series | Voltage Class | Approx. Current Class | Power Class | Main Application Area |
|---|---|---|---|---|---|
| 25B-D030N114 | PowerFlex 525 | 480 VAC class | 30 A class | Small/medium motors | Compact machines, pumps, fans |
| 25C-D030N114 | PowerFlex 523 | 480 VAC class | 30 A class | Small/medium motors | General-purpose machinery |
| 20G1ABC260JN0NNNNN | PowerFlex 755 | 400 VAC class | 260 A | 132 kW ND / 110 kW HD | Large industrial machinery |
| 20G1ABC302JN4NNNNN | PowerFlex 755 | 400 VAC class | 302 A | Approx. 160 kW ND / 132 kW HD | Large process equipment |
| 20G1ABC460JN4NNNNN | PowerFlex 755 | 400 VAC class | 460 A class | Large-power industrial | High-power industrial applications |
The smaller PowerFlex 525 and 523 families are generally more appropriate for compact and medium-sized machines, while the PowerFlex 755 platform is intended for substantially larger and more demanding applications.
The main advantage of the 20G1AGD248AN0NNNNN over a smaller drive is its high current capacity.
A compact drive may be ideal for a 10 HP, 20 HP, or 30 HP machine, but it would not be appropriate for a large motor requiring hundreds of amps.
The PowerFlex 755 architecture provides the additional electrical capacity and industrial functionality required for larger equipment.
For this reason, the 20G1AGD248AN0NNNNN is better viewed as a large industrial motor-control platform, rather than simply a high-power version of a compact VFD.
For maintenance teams, standardization around a common drive family can be valuable.
The PowerFlex 755 family allows technicians to become familiar with a common architecture, parameter structure, fault-management approach, and general operating philosophy.
Typical maintenance activities include:
At this power level, preventive maintenance is particularly important because cooling and electrical connections can have a major influence on long-term reliability.
| Application | Main Drive Benefit |
|---|---|
| Pumps | Variable-speed process control |
| Fans | Adjustable airflow and controlled starting |
| Conveyors | Smooth acceleration and speed control |
| Mixers | Controlled motor speed and torque |
| Material Handling | Adjustable speed and centralized control |
| Process Machinery | Integration with automation systems |
| Large Blowers | Controlled airflow and reduced mechanical stress |
| Industrial Production Lines | Networked control and diagnostics |
| Water Systems | Process-speed adjustment |
| Mining Equipment | High-power motor control |
| Cement Equipment | Large-motor speed control |
| General Manufacturing | Flexible motor-control architecture |
The catalog number itself contains useful configuration information.
The 20G prefix identifies the PowerFlex 755 drive family.
The D voltage designation corresponds to the 480 VAC class.
The 248 section identifies the 248 A current rating.
The remaining catalog characters define additional configuration characteristics such as input arrangement, filtering/common-mode configuration, braking, HIM arrangement, and other options.
This is why two PowerFlex 755 drives with similar current ratings should not automatically be considered interchangeable.
The catalog-number structure in the PowerFlex 750 documentation identifies the voltage class and input architecture through specific catalog-number characters.
One of the most important points regarding the 20G1AGD248AN0NNNNN is its lifecycle status.
The original model is listed as discontinued, and the published direct replacement is 20G1AGD248JN0NNNNN.
For an existing machine, the original drive may still be perfectly relevant as a maintenance or spare-parts reference.
For a new project, however, the replacement catalog number should normally be evaluated first.
Before replacing the drive, verify:
A direct catalog replacement should still be checked against the actual machine application.
For a 480 VAC three-phase industrial system requiring approximately 248 A of drive output, the 20G1AGD248AN0NNNNN represents a substantial PowerFlex 755 drive configuration.
Its key characteristics are:
The combination of high current capacity, large-motor capability, industrial enclosure protection, and PowerFlex 755 functionality makes the unit suitable for demanding motor-control applications.
| Category | Specification |
|---|---|
| Brand | Allen-Bradley |
| Product Family | PowerFlex |
| Series | PowerFlex 755 |
| Product Type | AC Variable Frequency Drive |
| Model | 20G1AGD248AN0NNNNN |
| Lifecycle | Discontinued |
| Direct Replacement | 20G1AGD248JN0NNNNN |
| Voltage | 480 VAC |
| Phase | 3-Phase |
| Rated Current | 248 A |
| Normal Duty | 200 HP |
| Normal Duty, Approx. | 150 kW |
| Heavy Duty | 150 HP |
| Heavy Duty, Approx. | 112 kW |
| Frame | Frame 7 |
| Cooling | Forced Air |
| Enclosure | Type 12 / IP54 |
| Input | AC Input with Precharge |
| DC Terminals | No |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Filtering | Filtered configuration |
| Typical Application | Pumps, fans, conveyors, process machinery |
| Approx. Width | 500–600 mm |
| Approx. Height | 800–1000 mm |
| Approx. Depth | 400–500 mm |
| Approx. Weight | 100–160 kg |
| Installation | Industrial panel / packaged drive |
| Recommended Environment | Industrial |
| Replacement Planning | Verify electrical, mechanical and control compatibility |
The Allen-Bradley 20G1AGD248AN0NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control applications.
Its 248 A output rating, 200 HP Normal Duty capability, 150 HP Heavy Duty capability, and Frame 7 construction place it firmly in the large-motor industrial-drive category.
The Type 12 / IP54 configuration gives the packaged drive a useful level of environmental protection, while forced-air cooling provides the thermal management necessary for a high-power drive.
The absence of dynamic braking is an important configuration characteristic and should be considered whenever the drive is applied to high-inertia loads or machinery requiring rapid stopping.
The blank/no-HIM configuration is also significant. It makes the unit well suited to installations where operation and monitoring are handled through a plant control system, remote HMI, or industrial communication network rather than through a permanently mounted local interface.
For existing equipment, this catalog number remains a valuable identification and maintenance reference. For new installations, the published direct replacement 20G1AGD248JN0NNNNN should be evaluated first, while checking the complete electrical, mechanical, control, communication, and braking requirements of the machine.
In practical terms, the 20G1AGD248AN0NNNNN is best suited to large pumps, fans, conveyors, material-handling systems, process machinery, large production equipment, and other industrial applications requiring high-capacity variable-speed AC motor control.