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Allen-Bradley 20J1F3C302LNANNNNN PowerFlex 750 Bus Supply

1. Product Identification

The Allen-Bradley 20J1F3C302LNANNNNN is a high-power PowerFlex 750 Bus Supply designed for industrial drive systems requiring a centralized DC-bus power architecture.

The product belongs to the air-cooled PowerFlex 750 bus-supply family and is associated with the PowerFlex 755T architecture for regenerative and low-harmonic operation. Catalog data identifies the C302 configuration as a Type 1/IP21, floor-mounted, air-cooled regenerative and low-harmonic bus supply.

The C302 configuration is listed with the following drive-duty ratings:

• Light Duty (LD): 228 kW / 394 A
• Normal Duty (ND): 188 kW / 324 A
• Heavy Duty (HD): 162 kW / 279 A

These ratings are useful when evaluating the product for different machine duty profiles.

2. Basic Product Parameters

Parameter	Specification
Brand	Allen-Bradley
Model	20J1F3C302LNANNNNN
Product Family	PowerFlex 750 Bus Supply
Related Architecture	PowerFlex 755T
Product Type	Air-Cooled Regenerative & Low-Harmonic Bus Supply
Installation Type	Floor mount
Enclosure Classification	Type 1 / IP21
Input Architecture	Regenerative Active Front End
Harmonic Performance	Low-harmonic architecture
Electrical Class	400 V AC class
Cooling	Air cooled
Main Function	DC-bus power supply
Light-Duty Rating	228 kW / 394 A
Normal-Duty Rating	188 kW / 324 A
Heavy-Duty Rating	162 kW / 279 A
Primary Application	Common DC-bus industrial drive systems
Regenerative Operation	Yes
Installation Environment	Industrial
Mounting	Floor mounted
Approx. Dimensions	Approx. 1,000–1,300 mm H × 500–700 mm W × 400–600 mm D*
Approx. Weight	Approx. 100–160 kg*

*The dimensional and weight figures are engineering planning estimates, not exact catalog values for the complete configured assembly. Final mechanical drawings and the actual equipment nameplate should be used for cabinet fabrication, shipping, lifting, and floor-loading calculations.

3. Product Series

Product Series: PowerFlex 750 Bus Supply

Related Architecture: PowerFlex 755T

The 20J1F3C302LNANNNNN belongs to the PowerFlex 750 Bus Supply family.

The related PowerFlex 755T architecture is designed for demanding industrial power-conversion applications where regenerative operation, low harmonic performance, and coordinated multi-drive operation are important.

The product is therefore different from a simple standalone variable-frequency drive.

Its primary function is to establish and manage the electrical DC bus used by compatible drive sections.

4. Product Introduction

The 20J1F3C302LNANNNNN is intended for large industrial machines where several motor-drive sections operate from a common electrical power architecture.

The unit converts and manages incoming AC electrical power for the DC-bus system.

The DC bus can then supply compatible drive sections connected to individual motors.

This architecture becomes particularly useful when several motors operate together and when some of those motors can return energy during braking or deceleration.

The active-front-end architecture also makes the product suitable for applications where low harmonic distortion and controlled power flow are important system-level considerations.

In practical terms, the 20J1F3C302LNANNNNN can be viewed as the central power-conversion section of a coordinated multi-drive system.

5. Main Electrical Ratings

The C302 configuration is listed with three principal operating-duty ratings.

Duty Rating	Power Rating	Current Rating	Typical Operating Concept
Light Duty (LD)	228 kW	394 A	Higher available power for less demanding overload conditions
Normal Duty (ND)	188 kW	324 A	General industrial continuous-duty operation
Heavy Duty (HD)	162 kW	279 A	More demanding overload / torque applications

The three ratings are important because the same physical product can be applied differently depending on the machine duty cycle.

A machine with relatively stable loading may be evaluated using the normal-duty rating.

A machine with frequent torque peaks or demanding acceleration and deceleration may need to be evaluated against the heavy-duty requirements.

The correct selection should always be based on the actual load profile rather than simply choosing the largest numerical power figure.

6. Light-Duty Rating

The listed Light-Duty rating is:

228 kW / 394 A

This rating is relevant where the application requires the higher power capability associated with the light-duty operating profile.

Typical applications may include industrial machinery with relatively moderate overload requirements but significant continuous operating power.

When selecting the product, the actual machine acceleration profile, operating temperature, load cycle, and regenerative requirements should still be reviewed.

7. Normal-Duty Rating

The listed Normal-Duty rating is:

188 kW / 324 A

This provides a useful reference point for general industrial applications.

Normal-duty operation is typically considered when the machine has a relatively predictable load profile and does not require the same overload characteristics associated with more demanding heavy-duty applications.

8. Heavy-Duty Rating

The listed Heavy-Duty rating is:

162 kW / 279 A

The lower numerical power rating compared with the light-duty value does not mean that the product is less capable.

Instead, duty classification reflects the allowable operating conditions, overload characteristics, and thermal requirements associated with different industrial load profiles.

Heavy-duty operation is particularly relevant for machinery involving high starting torque, frequent acceleration, rapid deceleration, or significant load variation.

9. Regenerative Architecture

One of the major characteristics of this product family is regenerative operation.

During normal motor operation, electrical energy flows from the AC supply toward the DC bus and then to the motor-drive sections.

During braking or overhauling operation, mechanical energy can be converted back into electrical energy.

That energy returns to the DC bus.

The regenerative front-end architecture provides a controlled path for managing this reverse energy flow.

This is particularly valuable in machines where regenerative operation occurs frequently rather than occasionally.

10. Low-Harmonic Operation

The product is identified as a regenerative and low-harmonic bus supply.

Low-harmonic performance can be important in large industrial facilities.

High-power drive systems can influence the electrical quality of the plant supply.

A controlled active-front-end architecture can provide a more sophisticated approach to input-current management than a simple uncontrolled rectifier.

This can be particularly useful in facilities where multiple high-power drives operate simultaneously and where electrical-network performance is an important engineering consideration.

11. Air-Cooled Construction

The 20J1F3C302LNANNNNN is identified as an air-cooled bus supply.

Air cooling is a practical solution for industrial power-conversion equipment.

It eliminates the need for a separate liquid-cooling circuit.

There is no external coolant loop, pump, reservoir, or liquid heat exchanger required as part of the basic cooling concept.

However, the cabinet or equipment room must provide sufficient airflow.

The thermal design should account for the bus supply itself as well as nearby drive sections, reactors, transformers, contactors, filters, and other heat-generating equipment.

12. Type 1 / IP21 Construction

The listed configuration is Type 1 / IP21 and floor mounted.

This indicates that the equipment should be considered industrial electrical equipment intended for an appropriately controlled installation environment rather than an outdoor, washdown, or highly exposed installation.

The installation area should be evaluated for:

• Dust.
• Moisture.
• Condensation.
• Oil mist.
• Corrosive gases.
• Ambient temperature.
• Ventilation.
• Accessibility.
• Electrical clearance.

The enclosure classification should be considered as part of the complete system design.

13. Product Applications

13.1 Large Conveyor Systems

Large conveyors can contain several motors distributed across different sections.

A common DC-bus architecture allows the motor drives to operate from a coordinated power system.

This is particularly useful for:

• Mining conveyors.
• Port conveyors.
• Bulk-material conveyors.
• Manufacturing conveyors.
• Long-distance transport systems.
• Automated material-handling systems.

13.2 Cranes

Cranes are one of the clearest examples of equipment that can benefit from regenerative drive architecture.

During lifting, motors consume electrical energy.

During lowering, gravitational energy can cause the motor to operate as a generator.

This creates a significant regenerative load.

A regenerative bus supply provides a suitable architecture for managing this changing power flow.

13.3 Hoists

Industrial hoists frequently operate with high torque and large mechanical loads.

Acceleration and deceleration can occur many times during a normal operating cycle.

The common DC-bus architecture is well suited to applications where several motor sections need to operate together.

13.4 Winding Machines

Winders and unwinders are characterized by frequent changes in motor operating condition.

The motor may accelerate a roll, maintain tension, decelerate the roll, or reverse the direction of energy flow.

A regenerative common-bus architecture can therefore be highly useful for this type of machinery.

13.5 Paper and Film Processing

Paper, plastic film, foil, and similar continuous-web machinery commonly use multiple synchronized motors.

The drive sections must maintain speed and torque coordination across the production line.

A centralized bus supply can provide the electrical foundation for these coordinated systems.

13.6 Metal Processing

Metal-processing equipment often requires substantial motor power.

Examples include:

• Rolling systems.
• Feed systems.
• Processing lines.
• Tension-control equipment.
• Material-handling machinery.
• Cutting systems.

These machines may also involve significant acceleration and deceleration requirements.

13.7 Test Stands

Large industrial test stands can repeatedly accelerate and decelerate motors.

This creates a considerable regenerative energy flow.

The bus-supply architecture can provide a controlled power path for these repetitive operating cycles.

13.8 Machine Tools

Large machine tools may use multiple high-power motor systems.

A centralized DC-bus architecture can simplify the electrical organization when multiple drive sections must operate together.

14. Product Advantages

14.1 Regenerative Energy Management

The most important advantage is the ability to support regenerative power flow.

This makes the product particularly useful for machines where mechanical energy is frequently returned to the electrical system.

14.2 Low-Harmonic Power Architecture

The active-front-end design is intended for applications where input-current quality is an important engineering consideration.

This can be valuable in facilities with substantial electrical loads and multiple power-electronic systems.

14.3 Common DC-Bus Operation

The bus supply provides a centralized electrical source for compatible drive sections.

This can make the overall machine architecture more coordinated than a collection of independent drives.

14.4 Multi-Motor Integration

Several drive sections can be organized around the common DC-bus system.

This is particularly useful for production lines where motors have mechanical or process relationships.

14.5 High Industrial Power Density

The C302 configuration provides a substantial power capability while remaining within a relatively compact industrial floor-mounted architecture.

14.6 Air-Cooled Maintenance

Air cooling provides a relatively straightforward thermal-management approach.

There is no liquid-cooling infrastructure to maintain.

14.7 Multiple Duty Ratings

The availability of LD, ND, and HD ratings allows the equipment to be evaluated against different machine duty profiles.

This is useful when designing systems with varying overload requirements.

15. Detailed Technical Parameter Table

Technical Parameter	Specification
Brand	Allen-Bradley
Catalog Number	20J1F3C302LNANNNNN
Series	PowerFlex 750 Bus Supply
Related Platform	PowerFlex 755T
Product Type	Regenerative & Low-Harmonic Bus Supply
Cooling	Air cooled
Mounting	Floor mounted
Enclosure Classification	Type 1 / IP21
Input Voltage Class	400 V AC class
Light Duty	228 kW / 394 A
Normal Duty	188 kW / 324 A
Heavy Duty	162 kW / 279 A
Primary Function	DC-bus power supply
Regenerative Operation	Yes
Harmonic Architecture	Low harmonic
Application	Common DC-bus industrial systems
Typical Installation	Industrial equipment room / electrical cabinet
Approx. Height	1,000–1,300 mm*
Approx. Width	500–700 mm*
Approx. Depth	400–600 mm*
Approx. Weight	100–160 kg*

*Estimated planning range. Exact dimensions and mass should be verified from the final equipment configuration before installation.

16. Mechanical Dimensions

For preliminary layout purposes, the product can be considered within an approximate envelope of:

Height: 1,000–1,300 mm

Width: 500–700 mm

Depth: 400–600 mm

Estimated Weight: 100–160 kg

These figures should be regarded as planning values only.

The actual floor-mounted assembly can differ depending on configuration, accessories, bus connections, cabinet arrangement, and other system components.

For final mechanical engineering, the actual product drawing should take priority over any estimated dimensions.

17. Weight and Transportation

An estimated planning weight of approximately 100–160 kg is reasonable for preliminary handling calculations.

The actual shipping weight can differ from the equipment-only weight.

Transportation planning should consider:

• Packaging.
• Mounting frame.
• Bus connections.
• Accessories.
• Lifting points.
• Center of gravity.
• Forklift access.
• Crane access.
• Floor loading.

The actual weight should be verified before transportation or installation.

18. Installation Environment

The Type 1/IP21 configuration is intended for an appropriate industrial installation environment.

The installation location should be selected so that:

• Airflow is not obstructed.
• Excessive moisture is avoided.
• Condensation is controlled.
• Dust accumulation is minimized.
• Ambient temperature remains within the applicable equipment limits.
• Service personnel have adequate access.
• Incoming and outgoing cables can be routed safely.
• Grounding can be implemented correctly.
• Power and control wiring can be physically separated where necessary.

19. Electrical System Architecture

A typical system can be represented as:

Three-Phase AC Supply

↓

Input Protection / Switching

↓

20J1F3C302LNANNNNN

↓

Common DC Bus

↓

Drive Section 1 → Motor 1

Drive Section 2 → Motor 2

Drive Section 3 → Motor 3

Drive Section 4 → Motor 4

This architecture is especially useful when the motors are part of the same production machine.

The bus supply becomes the central electrical power-conversion component while the individual drive sections handle motor-specific control.

20. Engineering Selection Criteria

Selection Factor	Engineering Requirement
Supply Voltage	Verify 400 V AC class
Supply Frequency	Verify plant frequency
Duty Rating	Select LD, ND, or HD based on actual load
Continuous Power	Verify against machine load
Peak Power	Verify acceleration requirements
Regenerative Power	Calculate maximum return energy
DC Bus	Confirm compatible bus architecture
Harmonics	Evaluate plant power-quality requirements
Cooling	Confirm cabinet airflow
Installation	Confirm floor-mounted arrangement
Enclosure	Confirm Type 1/IP21 environment
Cabling	Size conductors for actual current
Protection	Coordinate upstream protection
Grounding	Verify complete grounding design
Mechanical Clearance	Confirm final dimensions
Weight	Verify actual equipment mass

21. Duty Selection

The three listed duty classes should be considered carefully.

Duty	Rating	Application Consideration
Light Duty	228 kW / 394 A	Higher power rating for suitable duty profile
Normal Duty	188 kW / 324 A	General industrial operating profile
Heavy Duty	162 kW / 279 A	More demanding torque and overload conditions

The duty classification should be selected based on the machine’s actual operating cycle.

It is not appropriate to select the duty rating simply by comparing the nominal motor nameplate power.

Acceleration time, braking frequency, torque requirements, overload duration, ambient temperature, and regenerative behavior should all be considered.

22. Five Closely Related Models

The following five models are useful comparison points within the same PowerFlex 750 Bus Supply / PowerFlex 755T family.

Model	Product Type	Voltage Class	Cooling	Duty Information	Approx. Dimensions*	Approx. Weight*
20J1F3C302LNANNNNN	Regenerative & Low-Harmonic Bus Supply	400 V AC class	Air cooled	LD 228 kW / 394 A; ND 188 kW / 324 A; HD 162 kW / 279 A	1,000–1,300 × 500–700 × 400–600 mm	100–160 kg
20J1F3C650LNDNNNNN-C1	Regenerative & Low-Harmonic Bus Supply	400 V AC class	Air cooled	LD 467 kW / 805 A; ND 405 kW / 698 A; HD 336 kW / 579 A	1,200–1,600 × 650–900 × 450–650 mm	150–230 kg
20J1F3C770LNDNNNNN	Regenerative & Low-Harmonic Bus Supply	400 V AC class	Air cooled	LD 518 kW / 893 A; ND 479 kW / 826 A; HD 405 kW / 698 A	1,300–1,700 × 700–1,000 × 500–700 mm	180–280 kg
20J1F3C920LNANNNNN	Regenerative & Low-Harmonic Bus Supply	400 V AC class	Air cooled	LD 647 kW / 1116 A; ND 572 kW / 987 A; HD 479 kW / 826 A	1,400–1,800 × 750–1,050 × 500–750 mm	220–330 kg
20J1F3F735LNDNNNNN	Regenerative & Low-Harmonic Bus Supply	400 V AC class	Air cooled	LD 842 kW / 842 A; ND 754 kW / 754 A; HD 667 kW / 667 A	1,500–1,900 × 800–1,100 × 550–800 mm	250–380 kg

The electrical ratings shown for the related configurations are catalog-listed values.

The dimensions and weights in this comparison table are engineering estimates intended to make the models easier to compare physically; they are not exact catalog mechanical specifications.

23. Five Same-Brand PowerFlex Models for Broader Comparison

The following models provide useful comparison points from the same Allen-Bradley PowerFlex ecosystem.

Model	Product Family	Product Type	Electrical Class	Cooling	Typical Application	Approx. Dimensions*	Approx. Weight*
20F11FD096JA0NNNNN	PowerFlex 753	AC Drive	Industrial AC	Air cooled	Pumps, fans, conveyors	Approx. 500 × 250 × 250 mm	20–40 kg
20F11FD2P1AA0NNNNN	PowerFlex 753	AC Drive	Industrial AC	Air cooled	General industrial machinery	Approx. 700 × 300 × 300 mm	30–60 kg
20G14NE242JN0NNNNN	PowerFlex 755	AC Drive	Industrial AC	Air cooled	High-performance motor control	Approx. 500 × 300 × 300 mm	20–40 kg
20G14NE289JN0NNNNN	PowerFlex 755	AC Drive	Industrial AC	Air cooled	Process machinery	Approx. 600 × 350 × 300 mm	30–50 kg
20G1G4F920MNDNNNNN	PowerFlex 755	AC Packaged Drive	690 V AC class	Air cooled	Large industrial drive systems	Approx. 2,000 × 1,500 × 900 mm	1,000–1,500 kg

*Approximate planning values only. Exact dimensions and weights depend on the particular frame, enclosure, options, and configured assembly.

24. Bus Supply vs. Conventional AC Drive

Feature	20J1F3C302LNANNNNN	Conventional AC Drive
Main Function	DC-bus power supply	Direct motor control
AC Input	Yes	Yes
DC Bus	Main system output	Internal conversion stage
Motor Output	Through compatible drive sections	Direct AC motor output
Common DC Bus	Core application	Configuration dependent
Regeneration	Major application feature	Application dependent
Multi-Motor System	Highly suitable	Depends on system
Power Architecture	Centralized	Usually individual
Typical Machine Size	Medium/high-power industrial	Small to high-power
System Engineering	System-level	Drive-level or system-level

25. Regenerative Applications

Regenerative operation is particularly important in machines with stored mechanical energy.

Examples include:

• Cranes.
• Hoists.
• Elevators.
• Centrifuges.
• High-inertia conveyors.
• Winders.
• Unwinders.
• Test stands.
• Dynamometers.
• Large machine tools.
• Material-handling systems.
• Vertical lifting machinery.

In these machines, the electrical system must be designed for both motoring and generating operation.

The bus supply should therefore be evaluated using the complete machine operating cycle rather than simply the motor’s continuous power rating.

26. Low-Harmonic Applications

Low-harmonic operation can be particularly useful in facilities where large numbers of power-electronic loads are installed.

Examples include:

• Large manufacturing plants.
• Metals processing.
• Paper mills.
• Mining facilities.
• Ports.
• Large material-handling installations.
• Process plants.

In these environments, electrical-network performance can become an important part of overall system reliability.

The active-front-end architecture provides a more controlled interface between the AC supply and DC-bus system than a basic uncontrolled rectifier.

27. Maintenance

The 20J1F3C302LNANNNNN should be included in a planned industrial maintenance program.

Cooling airflow should be inspected periodically.

Fans and ventilation passages should be kept clear.

The cabinet should be maintained in an appropriate condition for the Type 1/IP21 installation environment.

Electrical connections should be inspected for signs of:

• Overheating.
• Discoloration.
• Loose connections.
• Damaged insulation.
• Corrosion.
• Abnormal vibration.

The complete maintenance procedure should also include inspection of grounding and associated DC-bus connections.

28. Safety

The DC bus should always be treated as a hazardous-energy source.

Switching off the incoming AC supply does not automatically mean that the DC bus is safe.

Before maintenance work, the complete system should be isolated according to the applicable electrical safety procedure.

The DC-bus voltage must be verified using the correct measurement method before access is permitted.

Only qualified industrial electrical personnel should install, commission, troubleshoot, or maintain this equipment.

29. Replacement Considerations

When replacing a 20J1F3C302LNANNNNN, the complete catalog number should be compared with the proposed replacement.

The following characteristics are particularly important:

Replacement Item	What to Verify
Input Voltage	Must match system voltage
Duty Rating	Must satisfy machine duty
Current	Must satisfy continuous and peak demand
Power	Must satisfy actual load
Regeneration	Must support required energy flow
DC Bus	Must be compatible
Harmonics	Must meet plant requirements
Cooling	Must match cabinet thermal design
Enclosure	Must suit installation environment
Dimensions	Must fit the existing installation
Weight	Must be suitable for mechanical structure
Bus Connections	Must match existing architecture
Controls	Must integrate with machine control
Communication	Must match control network
Safety	Must satisfy machine safety requirements

30. Why the C302 Configuration Is Important

The C302 designation is an important part of the catalog number.

It should not be treated as a cosmetic variation.

Within the PowerFlex 750 Bus Supply family, different catalog-number configurations correspond to different electrical capacities and system arrangements.

The C302 configuration is associated with the approximately 394 A Light-Duty / 324 A Normal-Duty / 279 A Heavy-Duty rating set.

Therefore, replacing it with a larger C650, C770, or C920 configuration is not simply a matter of selecting a physically larger unit.

The complete electrical system, mechanical installation, protection, cabling, and control architecture must be evaluated.

31. Practical Application Example

Consider a large production machine containing four motors.

Motor 1 controls material feeding.

Motor 2 controls the primary processing section.

Motor 3 controls material tension.

Motor 4 controls take-up or winding.

Each motor can experience different operating conditions.

At one moment, Motor 1 may be accelerating.

At the same time, Motor 4 may be decelerating.

Motor 4 can return energy to the common DC bus while Motor 1 requires additional electrical power.

This is exactly the type of system-level situation where a centralized bus-supply architecture can be advantageous.

The 20J1F3C302LNANNNNN can serve as the central electrical interface supporting this type of coordinated drive architecture.

32. Product Advantages Summary

Advantage	Practical Benefit
Regenerative Architecture	Handles bidirectional power flow
Low-Harmonic Design	Supports improved input-power management
Common DC Bus	Allows coordinated drive architecture
Air Cooling	Straightforward industrial thermal management
Multiple Duty Ratings	Easier matching to machine load profile
Floor Mounting	Suitable for large industrial installations
Multi-Drive Capability	Supports coordinated machinery
High Power	Suitable for demanding industrial applications
Centralized Architecture	Simplifies large-system power organization
Industrial Construction	Suitable for controlled industrial environments

33. Detailed Mechanical Planning Table

Mechanical Parameter	Preliminary Planning Value
Height	1,000–1,300 mm
Width	500–700 mm
Depth	400–600 mm
Approx. Weight	100–160 kg
Mounting	Floor mounted
Cooling	Air cooled
Enclosure	Type 1 / IP21
Service Access	Required
Cable Access	Allow additional working space
Ventilation	Required
Lifting	Suitable industrial lifting equipment
Floor Loading	Verify using actual equipment weight

The mechanical values are intentionally presented as approximate planning figures because the exact configured mechanical drawing should be used for final engineering.

34. Product Selection Summary

Item	Specification
Brand	Allen-Bradley
Series	PowerFlex 750
Related Architecture	PowerFlex 755T
Product Family	PowerFlex 750 Bus Supply
Model	20J1F3C302LNANNNNN
Product Type	Air-Cooled Regenerative & Low-Harmonic Bus Supply
Mounting	Floor mount
Enclosure	Type 1 / IP21
Input Class	400 V AC
LD Rating	228 kW / 394 A
ND Rating	188 kW / 324 A
HD Rating	162 kW / 279 A
Cooling	Air cooled
Regeneration	Yes
Harmonic Architecture	Low harmonic
Main Function	Common DC-bus power supply
Approx. Dimensions	1,000–1,300 × 500–700 × 400–600 mm*
Approx. Weight	100–160 kg*

*Estimated planning values only.

35. Final Product Description

The Allen-Bradley 20J1F3C302LNANNNNN is a high-power PowerFlex 750 Bus Supply designed for industrial drive systems that require a centralized DC-bus power architecture.

It is an air-cooled, floor-mounted, Type 1/IP21 regenerative and low-harmonic bus-supply configuration associated with the PowerFlex 755T architecture.

The C302 configuration is listed at 228 kW / 394 A for Light Duty, 188 kW / 324 A for Normal Duty, and 162 kW / 279 A for Heavy Duty.

The product is particularly appropriate for industrial machinery in which several motors need to operate together through a common DC-bus system.

Typical applications include cranes, hoists, conveyors, winding systems, material-handling machinery, paper and film processing, metal-processing equipment, test stands, large machine tools, and coordinated production lines.

Its regenerative architecture is particularly useful when the machine frequently returns mechanical energy to the electrical system during braking, deceleration, lowering, or overhauling operation.

Its low-harmonic architecture is also relevant in large industrial facilities where the effect of high-power electronic loads on the plant electrical system needs to be considered.

The air-cooled design provides a practical thermal-management approach for industrial installations, while the floor-mounted Type 1/IP21 construction is suited to an appropriately controlled electrical installation environment.

For preliminary mechanical planning, an approximate envelope of 1,000–1,300 mm high, 500–700 mm wide, and 400–600 mm deep, with an estimated weight of approximately 100–160 kg, can be used.

These dimensions and weight values are planning estimates and should not replace the actual mechanical drawing.

The most important product identification information is:

Brand: Allen-Bradley

Series: PowerFlex 750

Related Architecture: PowerFlex 755T

Product Family: PowerFlex 750 Bus Supply

Model: 20J1F3C302LNANNNNN

Product Type: Air-Cooled Regenerative & Low-Harmonic Bus Supply

Mounting: Floor Mount

Enclosure: Type 1 / IP21

Input Class: 400 V AC

Light Duty: 228 kW / 394 A

Normal Duty: 188 kW / 324 A

Heavy Duty: 162 kW / 279 A

Cooling: Air cooled

Primary Function: Common DC-bus power supply

Main Applications: Cranes, hoists, conveyors, winding systems, material handling, process machinery, test stands, and multi-drive production systems

Approximate Weight: 100–160 kg

Approximate Dimensions: 1,000–1,300 × 500–700 × 400–600 mm

For a complete industrial installation, the 20J1F3C302LNANNNNN should be evaluated as a system-level power-conversion component. Its suitability depends not only on motor power, but also on duty cycle, regenerative energy, input power quality, DC-bus configuration, thermal conditions, mechanical space, and compatibility with the connected drive sections.