Company Information
E-mail		[email protected]
Mobile		+8615980777398
Whatsapp		+8615980777398
WeChat		15980777398

Allen-Bradley 20G1AJE395JN4NNNNN PowerFlex 755 Air-Cooled AC Drive

1. Product Overview

The Allen-Bradley 20G1AJE395JN4NNNNN is a high-power PowerFlex 755 Series air-cooled AC drive designed for demanding industrial motor-control applications where high output power, stable speed regulation, reliable torque control, and flexible system integration are required.

This model belongs to the large-frame PowerFlex 755 family and is designed around a 600 VAC, three-phase input system. It uses a Frame 8 power structure and is rated at approximately 395 A for its primary catalog configuration.

The drive is intended for large industrial motors and high-capacity machinery. Its power range reaches approximately 400 HP under Normal Duty and 350 HP under Heavy Duty, making it suitable for substantial mechanical loads such as pumps, fans, compressors, conveyors, mixers, extruders, process machinery, material-handling systems, and other large motor-driven equipment.

The JN4 configuration is particularly useful when an operator interface is required at the drive cabinet. Compared with versions without a HIM, this configuration provides an Enhanced LCD Full Numeric HIM, allowing operators and maintenance personnel to view operating parameters, fault information, drive status, diagnostic information, and configuration data directly from the drive.

The product uses an AC input with precharge and no DC terminals, an arrangement intended for the specified packaged-drive architecture. The enclosure configuration is UL Type 12 / IP54, with an 800 mm deep MCC-style enclosure, providing a substantially more protected installation arrangement than an open-frame drive.

The model also incorporates a CM jumper installed configuration and does not include dynamic braking as a standard feature. Where the application requires regenerative energy management or controlled stopping of high-inertia loads, the braking and regeneration architecture should therefore be evaluated as part of the complete drive system.

---

2. Basic Product Information

Parameter	Specification
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Family	PowerFlex 755 AC Drives
Product Type	Air-Cooled AC Drive
Catalog Number	20G1AJE395JN4NNNNN
Drive Construction	Packaged / Enclosed Drive
Cooling Method	Air Cooled
Input Voltage	600 VAC class
Input Phase	Three Phase
Rated Current	395 A catalog rating
Normal Duty Rating	Approximately 400 HP
Heavy Duty Rating	Approximately 350 HP
Frame Size	Frame 8
Enclosure	UL Type 12 / IP54
Enclosure Style	800 mm Deep MCC Style
Input Type	AC Input with Precharge
DC Terminals	Not provided for this configuration
Filtering	Filtered
CM Configuration	CM Jumper Installed
Dynamic Braking	None
Operator Interface	Enhanced LCD Full Numeric HIM
HIM Protection	IP66 / NEMA Type 4X/12 class
Communication Capability	Industrial network integration, including EtherNet/IP architecture
Primary Application	Large industrial AC motor control
Installation Type	Industrial cabinet / MCC-style installation
Approximate Dimensions	Approximately 2100–2500 mm H × 600 mm W × 800 mm D*
Approximate Weight	Approximately 600–650 kg*

* Dimensions and weight can vary according to the complete packaged configuration, cabinet options, wiring bay, disconnect/protection options, and other selected equipment. For installation engineering, the final dimensional drawing and equipment nameplate should be treated as the controlling information.

---

3. Product Model Interpretation

The catalog number 20G1AJE395JN4NNNNN contains configuration information that identifies the general drive family and its major construction characteristics.

Catalog Element	General Meaning
20G	PowerFlex 755 AC drive family
1	Product configuration designation
AJE	600 VAC class / large-frame air-cooled configuration
395	395 A catalog class
J	CM jumper installed configuration
N4	Enhanced LCD Full Numeric HIM configuration
NNNNN	Additional factory/configuration positions

The important distinction between the AN4 and JN4 versions is the CM jumper configuration.

The AN4 version uses the CM jumper removed configuration, while the JN4 version uses the CM jumper installed configuration. This is an important consideration when replacing an existing drive because the grounding, common-mode behavior, and system installation conditions should be checked rather than assuming that two otherwise similar catalog numbers are electrically interchangeable without verification.

The N4 configuration identifies the enhanced operator-interface arrangement. This is valuable for applications where local commissioning, troubleshooting, parameter adjustment, and operator monitoring are required.

---

4. Power Rating and Electrical Characteristics

The 20G1AJE395JN4NNNNN is intended for high-power motor applications.

Its nominal catalog current is 395 A, with a maximum normal-duty motor rating of approximately 400 HP and a heavy-duty motor rating of approximately 350 HP.

The PowerFlex 755 600 V selection data for the corresponding Frame 8 395-class drive shows a larger current capability when evaluated according to the different duty classifications. The selection table associates the 395-class catalog position with approximately 435 A continuous Light Duty, 395 A continuous Normal Duty, and 329 A continuous Heavy Duty, with corresponding overload capabilities depending on duty classification.

This distinction is important in engineering applications. The catalog current should not automatically be interpreted as the allowable continuous current for every duty class.

For a high-inertia conveyor, crusher, extruder, mixer, hoist-related application, or another machine requiring substantial acceleration torque, the Heavy Duty current rating should be considered rather than selecting the drive solely according to the motor nameplate horsepower.

---

5. Electrical Parameter Table

Parameter	Specification
Catalog Number	20G1AJE395JN4NNNNN
AC Input Voltage	600 VAC class
Input Configuration	Three Phase
Catalog Current	395 A
Frame	Frame 8
Light Duty Continuous Current	Approx. 435 A
Normal Duty Continuous Current	Approx. 395 A
Heavy Duty Continuous Current	Approx. 329 A
Light Duty Motor Rating	Approx. 450 HP
Normal Duty Motor Rating	Approx. 400 HP
Heavy Duty Motor Rating	Approx. 350 HP
Normal Duty 1-Minute Overload	Approx. 435 A
Normal Duty 3-Second Overload	Approx. 593 A
Heavy Duty 1-Minute Overload	Approx. 494 A
Heavy Duty 3-Second Overload	Approx. 593 A
Input Type	AC Input with Precharge
DC Bus Terminals	Not supplied for this configuration
Dynamic Braking	None
Input Filtering	Filtered
CM Jumper	Installed
Cooling	Air Cooled
Enclosure	UL Type 12 / IP54
Enclosure Depth	800 mm MCC Style
HIM	Enhanced LCD Full Numeric
HIM Enclosure Rating	IP66 / NEMA Type 4X/12 class
Drive Frame Size	8
Approx. Dimensions	2100–2500 × 600 × 800 mm
Approx. Weight	600–650 kg

---

6. Enclosure and Mechanical Construction

One of the defining characteristics of this model is its Type 12 / IP54, 800 mm deep MCC-style enclosure.

This construction is intended for industrial environments where the drive cannot simply be installed as an exposed open-frame component.

The enclosed design helps protect the internal power electronics and control equipment from normal industrial dust and environmental exposure within the limits of the applicable enclosure classification.

The 800 mm depth also reflects the physical requirements of a large Frame 8 power assembly. High-current semiconductor components, bus structures, cooling assemblies, input equipment, output connections, control wiring, and cabinet ventilation require significantly more physical space than smaller PowerFlex drives.

Because this is a large packaged drive, mechanical planning should be performed before installation. Adequate clearance for cabinet doors, ventilation, cable routing, maintenance access, heat dissipation, and lifting should be considered.

---

7. Approximate Dimensions and Weight

For large Frame 8 packaged PowerFlex 755 configurations, the overall physical size is substantially greater than that of smaller standalone PowerFlex drives.

A practical planning value for this configuration is approximately:

Height: 2100–2500 mm

Width: approximately 600 mm

Depth: approximately 800 mm

Weight: approximately 600–650 kg

These values should be treated as engineering planning estimates rather than guaranteed shipping dimensions.

The actual finished dimensions and weight may change according to the packaged-drive arrangement, input protection, disconnect equipment, wiring bay, option bay, cabinet configuration, and other factory-installed equipment.

For procurement, transportation, foundation design, cabinet positioning, crane selection, and final installation, the actual equipment drawing and shipping documentation should be used.

---

8. Enhanced LCD Full Numeric HIM

The N4 configuration provides an Enhanced LCD Full Numeric HIM.

This is particularly useful for industrial maintenance because operators can work directly with drive parameters and diagnostic information without requiring an external programming computer for every basic adjustment.

The HIM can be used for functions such as:

• Local drive status monitoring.
• Parameter viewing.
• Parameter adjustment.
• Fault identification.
• Alarm monitoring.
• Drive diagnostic information.
• Motor operating information.
• Basic commissioning activities.
• Troubleshooting.
• Local maintenance support.

For large industrial equipment, this local interface can significantly reduce troubleshooting time because maintenance personnel can obtain drive information directly at the cabinet.

---

9. CM Jumper Installed Configuration

The J configuration indicates that the CM jumper is installed.

Common-mode configuration is an important consideration in high-power variable-frequency-drive installations because the drive generates high-frequency switching components as part of the PWM motor-control process.

The common-mode arrangement can influence:

• Electrical noise behavior.
• Ground-current characteristics.
• Motor bearing-current considerations.
• EMC performance.
• Cable and grounding requirements.
• Compatibility with the surrounding electrical system.

For this reason, the CM jumper configuration should be considered part of the drive selection rather than simply a catalog-number detail.

When replacing an existing drive, the electrical grounding and common-mode configuration of the original system should be checked carefully.

---

10. Filtering

The 20G1AJE395JN4NNNNN is configured as a filtered drive.

Filtering is important in industrial variable-frequency-drive installations because the high-frequency switching generated by the inverter can interact with other electrical equipment.

Proper filtering, grounding, shielding, cable selection, and installation practices can help control conducted and radiated electrical noise.

This is particularly important when the drive is installed near:

• PLC systems.
• Industrial communication equipment.
• Instrumentation.
• Analog measurement systems.
• Process-control equipment.
• Sensitive sensors.
• Industrial computers.
• Other variable-frequency drives.

The drive’s filtering configuration should still be considered together with the complete installation rather than being treated as a substitute for correct cable routing and grounding.

---

11. Cooling System

The product uses an air-cooled architecture.

At this power level, heat management becomes an important part of system design.

A large variable-frequency drive converts electrical energy into motor-control output, but some energy is inevitably dissipated as heat inside the drive. The cabinet and surrounding installation must therefore provide appropriate thermal management.

For this model, installation planning should consider:

• Ambient temperature.
• Cabinet ventilation.
• Airflow.
• Heat dissipation.
• Fan operation.
• Filter cleanliness.
• Cabinet internal temperature.
• Clearance around cooling paths.
• Preventive maintenance.

In dusty environments, cooling-system maintenance becomes especially important. Restricted airflow can increase semiconductor temperatures and reduce the service life of power components.

---

12. Product Introduction

The PowerFlex 755 platform is designed for applications requiring advanced motor control and a wide range of system integration capabilities.

The 20G1AJE395JN4NNNNN represents a high-power enclosed implementation of this platform.

It is particularly suitable where a large motor must be controlled from a centralized industrial electrical system.

Instead of operating a motor simply at fixed line frequency, the variable-frequency drive regulates motor speed and torque by controlling the electrical output supplied to the motor.

This provides major benefits in processes where the required motor speed changes according to production conditions.

For example, a pump may not need to operate at full speed continuously. A fan may need to respond to changing process demand. A conveyor may require controlled acceleration and deceleration. A mixer may need different operating speeds for different stages of a process.

The PowerFlex 755 architecture is designed to provide this type of controlled motor operation.

---

13. Typical Applications

13.1 Large Pumps

Large industrial pumps are one of the important applications for this type of drive.

A variable-frequency drive allows pump speed to be adjusted according to process requirements.

Typical applications include:

• Water treatment.
• Industrial water circulation.
• Cooling-water systems.
• Process pumps.
• Mining-water systems.
• Chemical process pumps.
• Large irrigation systems.

Variable-speed control can provide much better process control than simply switching a full-speed motor on and off.

---

13.2 Large Fans and Blowers

Large fans and blowers often operate for long periods and can consume substantial amounts of energy.

A PowerFlex 755 drive can regulate fan speed according to the actual ventilation or process requirement.

Applications can include:

• Industrial ventilation.
• Furnace ventilation.
• Dust extraction.
• Process-air systems.
• Mining ventilation.
• Large building ventilation.
• Industrial exhaust systems.

---

13.3 Conveyors

Large conveyors can require high starting torque, controlled acceleration, and stable operating speed.

The 20G1AJE395JN4NNNNN is appropriate for high-capacity conveyor systems where the motor power falls within the applicable drive rating.

Typical applications include:

• Mining conveyors.
• Bulk-material conveyors.
• Cement plants.
• Steel-processing lines.
• Port material-handling systems.
• Warehouse material-handling systems.

Controlled acceleration can also reduce mechanical shock to gearboxes, couplings, belts, chains, and other mechanical components.

---

13.4 Compressors

Large compressors can require substantial motor power and controlled starting.

The drive can be used where variable-speed operation is appropriate for the compressor system.

Potential applications include:

• Industrial air compressors.
• Process compressors.
• Refrigeration-related equipment.
• Gas-handling equipment.
• Process plants.

The final suitability depends on compressor characteristics, starting torque, operating envelope, motor type, and required duty cycle.

---

13.5 Mixers and Agitators

Industrial mixers often require controlled acceleration and variable operating speed.

Applications may include:

• Chemical mixing.
• Water-treatment mixing.
• Food-processing equipment.
• Mineral processing.
• Cement and concrete processing.
• Industrial batch processes.

The Enhanced LCD HIM can be useful during commissioning because the maintenance technician can monitor operating conditions and adjust relevant parameters directly from the drive interface.

---

13.6 Extrusion Machinery

Extrusion systems often require stable motor speed and controlled torque.

Typical applications include:

• Plastic extrusion.
• Rubber processing.
• Material processing.
• Continuous production machinery.

The drive’s high-power capacity makes it suitable for large extrusion systems where the motor rating is within the applicable duty range.

---

13.7 Industrial Process Lines

The PowerFlex 755 platform can also be incorporated into large automated production lines.

Possible applications include:

• Steel production.
• Cement manufacturing.
• Mining.
• Chemical processing.
• Water treatment.
• Pulp and paper.
• Material handling.
• General heavy industrial machinery.

---

14. Main Product Advantages

14.1 High-Power Motor Control

The most obvious advantage of this model is its ability to control very large motors.

With a catalog current of approximately 395 A and a Normal Duty rating around 400 HP, it is designed for applications substantially larger than those served by compact variable-frequency drives.

---

14.2 600 VAC Three-Phase Architecture

The 600 VAC three-phase configuration is appropriate for industrial electrical systems using higher-voltage motor power.

Higher voltage allows large amounts of motor power to be transmitted at lower current compared with an equivalent lower-voltage system.

This can help reduce conductor size and electrical losses in appropriately designed systems.

---

14.3 PowerFlex 755 Platform

The PowerFlex 755 family is designed for demanding industrial motor-control applications.

The platform provides a broad range of control, communication, diagnostic, and configuration capabilities, making it suitable for integration into larger automation systems.

---

14.4 Enhanced Local Operator Interface

The Enhanced LCD Full Numeric HIM is a major practical advantage.

Maintenance personnel can interact with the drive locally, which is particularly useful when commissioning or troubleshooting large equipment.

For a large industrial drive cabinet, having a local display can make fault investigation considerably more efficient.

---

14.5 Enclosed Industrial Construction

The Type 12 / IP54 packaged configuration provides a substantially more complete installation arrangement than an exposed open-frame drive.

This can simplify integration into industrial electrical rooms, MCC-style systems, and centralized motor-control installations.

---

14.6 Filtered Configuration

The filtered configuration is beneficial in applications where electromagnetic compatibility is an important design consideration.

When combined with suitable motor cable shielding, grounding, cabinet construction, and installation practices, the filtered drive architecture can contribute to better overall electrical-system behavior.

---

14.7 CM Jumper Installed

The factory-installed CM jumper configuration provides a defined common-mode configuration for the drive.

This can be useful when maintaining consistency across an existing drive installation or when the electrical system has been designed around this configuration.

---

14.8 Air-Cooled Architecture

Air cooling provides a practical thermal-management approach for a large industrial drive.

It avoids the complexity associated with liquid cooling while maintaining the ability to dissipate substantial amounts of heat when the cabinet ventilation system is correctly engineered.

---

14.9 Suitable for Large Industrial Equipment

The large Frame 8 design makes this drive suitable for equipment where smaller drives would not provide sufficient current or horsepower capability.

It is particularly useful for heavy industrial machinery and centralized motor-control systems.

---

15. Installation Considerations

A drive of this size should not be treated like a small standalone inverter.

Before installation, the following should be evaluated:

• Motor rated voltage.
• Motor rated current.
• Motor horsepower.
• Motor service factor.
• Motor operating speed.
• Starting torque.
• Load inertia.
• Acceleration time.
• Deceleration time.
• Ambient temperature.
• Installation altitude.
• Cabinet ventilation.
• Incoming power characteristics.
• Grounding system.
• Motor cable length.
• Motor cable construction.
• EMC requirements.
• Communication architecture.
• Maintenance clearance.
• Lifting requirements.
• Cabinet foundation.

Because the unit is physically large and heavy, mechanical handling should be planned before the equipment arrives at the installation site.

---

16. Maintenance Considerations

Regular preventive maintenance is important for large air-cooled drives.

The cooling system should be inspected periodically for dust accumulation, restricted airflow, fan problems, and abnormal operating temperatures.

Electrical connections should also be inspected according to the applicable maintenance program.

Typical maintenance activities can include:

• Inspecting cooling fans.
• Checking cabinet ventilation.
• Cleaning accumulated dust.
• Inspecting power connections.
• Checking grounding connections.
• Reviewing fault history.
• Checking communication status.
• Inspecting motor cables.
• Monitoring drive temperature.
• Reviewing abnormal alarms.
• Checking the local HIM.
• Inspecting cabinet components.

For installations in dusty industrial environments, maintenance intervals may need to be shorter than those used in clean electrical rooms.

---

17. Recommended Related Models – PowerFlex 755 Family

The following five models are closely related to the 20G1AJE395JN4NNNNN and are useful when selecting a PowerFlex 755 drive with similar architecture but different power ratings or configurations.

Model	Voltage	Current Class	Light Duty	Normal Duty	Heavy Duty	Frame	Enclosure / Configuration
20G1AJE295JN4NNNNN	600 VAC, 3 PH	295 A	350 HP	300 HP	250 HP	8	IP54 / Type 12, 800 mm MCC, N4 HIM
20G1AJE355JN4NNNNN	600 VAC, 3 PH	355 A	350 HP	350 HP	300 HP	8	IP54 / Type 12, 800 mm MCC, N4 HIM
20G1AJE395JN4NNNNN	600 VAC, 3 PH	395 A	450 HP	400 HP	350 HP	8	IP54 / Type 12, 800 mm MCC, N4 HIM
20G1AJE435JN4NNNNN	600 VAC, 3 PH	435 A	500 HP	450 HP	350 HP	8	IP54 / Type 12, 800 mm MCC, N4 HIM
20G1AJE460JN4NNNNN	600 VAC, 3 PH	460 A	500 HP	500 HP	400 HP	8	IP54 / Type 12, 800 mm MCC, N4 HIM

These models are particularly useful when the motor power is close to the boundary between two drive ratings.

For example, if a motor operates near the upper current limit of the 355 A model, moving to the 395 A or 435 A configuration may provide more appropriate capacity, depending on the actual motor current and duty cycle.

---

18. Detailed Comparison of the Five Related Models

Model	Continuous Current Class	Approx. Normal Duty Rating	Approx. Heavy Duty Rating	Frame	Cooling	HIM	Approx. Dimensions	Approx. Weight
20G1AJE295JN4NNNNN	295 A	300 HP	250 HP	8	Air Cooled	Enhanced LCD Full Numeric	Approx. 2100–2500 × 600 × 800 mm	Approx. 600–650 kg
20G1AJE355JN4NNNNN	355 A	350 HP	300 HP	8	Air Cooled	Enhanced LCD Full Numeric	Approx. 2100–2500 × 600 × 800 mm	Approx. 600–650 kg
20G1AJE395JN4NNNNN	395 A	400 HP	350 HP	8	Air Cooled	Enhanced LCD Full Numeric	Approx. 2100–2500 × 600 × 800 mm	Approx. 600–650 kg
20G1AJE435JN4NNNNN	435 A	450 HP	350 HP	8	Air Cooled	Enhanced LCD Full Numeric	Approx. 2100–2500 × 600 × 800 mm	Approx. 600–650 kg
20G1AJE460JN4NNNNN	460 A	500 HP	400 HP	8	Air Cooled	Enhanced LCD Full Numeric	Approx. 2100–2500 × 600 × 800 mm	Approx. 600–650 kg

The models above share the same general high-power PowerFlex 755 architecture, making them useful alternatives when the required motor rating changes.

When selecting between them, current rather than horsepower alone should be the primary consideration.

Motor nameplate current, duty cycle, overload requirement, ambient conditions, motor cable characteristics, and actual load profile should all be evaluated.

---

19. Five Popular Allen-Bradley Models from Other Drive Families

The following models represent useful and commonly encountered alternatives from the same Allen-Bradley brand. They cover smaller and different PowerFlex drive families and can be considered when the motor power or installation requirements are different.

Model	Series	Typical Voltage Class	Current / Rating	Typical Application	Enclosure / Form
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	General industrial machinery	Compact AC drive
25C-D030N114	PowerFlex 527	480 VAC class	30 A class	Machine automation / EtherNet-based systems	Compact AC drive
20G1AGC260JN0NNNNN	PowerFlex 755	480 VAC class	260 A class	Large industrial motor control	Frame 8
20G1AGC302JA0NNNNN	PowerFlex 755	480 VAC class	302 A class	High-power process machinery	Large-frame drive
20G1AGE053JA0NNNNN	PowerFlex 755	480 VAC class	53 A class	Medium/high-power industrial equipment	Large-frame PowerFlex 755

These models are not direct electrical substitutes for the 20G1AJE395JN4NNNNN.

They represent different voltage classes, current ratings, physical sizes, and application ranges. They are included as related Allen-Bradley products that may be considered when a project requires a different motor size or installation arrangement.

---

20. Application Selection Guide

Application	Suitability of 20G1AJE395JN4NNNNN	Main Reason
Large Water Pump	Excellent	High-power variable-speed control
Large Cooling Fan	Excellent	Variable-speed airflow control
Industrial Blower	Excellent	Large motor capacity
Mining Conveyor	Excellent	High torque and controlled acceleration
Cement Conveyor	Excellent	Heavy industrial motor control
Large Compressor	Very Good	High-power motor control
Mixer / Agitator	Excellent	Controlled speed and torque
Extruder	Very Good	Stable speed control
Process Machinery	Excellent	Flexible industrial control
Material Handling	Excellent	Large motor capacity
Small Machine	Poor Choice	Drive is physically oversized
Small Pump	Poor Choice	Excessive power capacity
Small Fan	Poor Choice	More economical smaller drive available

---

21. Why the 20G1AJE395JN4NNNNN Is Suitable for Heavy Industry

The primary reason for choosing this model is not simply its 395 A catalog rating.

The larger advantage is the combination of:

• High-voltage three-phase input.
• High current capability.
• Frame 8 construction.
• 400 HP Normal Duty capability.
• 350 HP Heavy Duty capability.
• Industrial Type 12 / IP54 enclosure.
• 800 mm MCC-style construction.
• Enhanced LCD Full Numeric HIM.
• Filtered configuration.
• CM jumper installed.
• Air-cooled thermal architecture.
• PowerFlex 755 platform.

This combination makes the product much more suitable for large centralized industrial systems than compact general-purpose variable-frequency drives.

---

22. Advantages for System Integrators

For system integrators, the large packaged format provides a relatively complete drive arrangement for high-power applications.

The enclosed construction can reduce the amount of additional cabinet engineering required compared with installing a large open-frame drive and designing a complete enclosure around it.

The integrated operator interface also simplifies commissioning.

The Frame 8 platform provides a common architecture across a range of large PowerFlex 755 drive ratings, which can help standardize engineering practices across a production facility.

For plants operating multiple large motors, maintaining a common drive family can also simplify:

• Operator training.
• Maintenance procedures.
• Spare-parts planning.
• Troubleshooting.
• Parameter management.
• Commissioning procedures.
• Electrical documentation.

---

23. Advantages for Maintenance Departments

From a maintenance perspective, the Enhanced LCD HIM is particularly useful.

Maintenance personnel can inspect drive operating information directly from the equipment rather than depending entirely on a remote engineering workstation.

This is valuable during unexpected downtime.

For example, if a conveyor stops unexpectedly, a technician can inspect the drive interface and determine whether the condition is associated with a fault, alarm, communication issue, or another drive operating condition.

The ability to access diagnostic information locally can reduce the time required to identify the initial cause of a shutdown.

---

24. Advantages for Process Control

Variable-speed control provides an important advantage over conventional fixed-speed motor operation.

The motor can operate closer to the actual process requirement instead of always running at a fixed speed.

This can be beneficial for:

• Pump flow control.
• Fan airflow control.
• Conveyor speed control.
• Mixer speed adjustment.
• Process optimization.
• Controlled acceleration.
• Controlled deceleration.
• Production-rate adjustment.
• Mechanical stress reduction.

For industrial processes, these capabilities can contribute to better process stability and improved machine control.

---

25. Advantages Compared with a Smaller Drive

A smaller drive may be less expensive and physically smaller, but it may not have sufficient current capacity for a large motor.

The 20G1AJE395JN4NNNNN is intended for applications where high current and high horsepower capability are more important than compact physical size.

Its Frame 8 architecture and large cabinet size are therefore not disadvantages in the target application.

They are a consequence of the power level and the industrial environment for which the drive is intended.

---

26. Important Selection Notes

When replacing an existing PowerFlex 755 drive with the 20G1AJE395JN4NNNNN, the following items should be checked carefully:

1. Motor voltage.
2. Motor nameplate current.
3. Motor horsepower.
4. Normal Duty or Heavy Duty application.
5. Required overload current.
6. Acceleration requirements.
7. Deceleration requirements.
8. Load inertia.
9. Dynamic braking requirements.
10. Input power configuration.
11. Common-mode configuration.
12. Motor cable length.
13. EMC requirements.
14. Cabinet dimensions.
15. Weight and lifting arrangements.
16. Communication requirements.
17. HIM requirements.
18. Input protection arrangement.
19. Environmental conditions.
20. Available maintenance clearance.

The correct drive should always be selected according to the actual motor current and load profile rather than horsepower alone.

---

27. Product Summary

Category	Details
Brand	Allen-Bradley
Series	PowerFlex 755
Model	20G1AJE395JN4NNNNN
Drive Type	Air-Cooled AC Drive
Voltage	600 VAC, Three Phase
Current	395 A catalog class
Normal Duty	Approx. 400 HP
Heavy Duty	Approx. 350 HP
Frame	Frame 8
Enclosure	UL Type 12 / IP54
Cabinet Style	800 mm Deep MCC Style
Cooling	Air Cooled
Input	AC with Precharge
DC Terminals	Not supplied
Filter	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Enhanced LCD Full Numeric
HIM Rating	IP66 / NEMA Type 4X/12 class
Typical Use	Large industrial motor control
Approx. Dimensions	2100–2500 × 600 × 800 mm
Approx. Weight	600–650 kg
Recommended Environment	Industrial electrical room / MCC-style installation

---

28. Final Product Assessment

The Allen-Bradley 20G1AJE395JN4NNNNN PowerFlex 755 is a high-capacity industrial AC drive intended for large three-phase motors and demanding process equipment.

Its combination of 600 VAC three-phase operation, 395 A catalog capacity, approximately 400 HP Normal Duty capability, Frame 8 construction, Type 12/IP54 enclosure, 800 mm MCC-style packaging, filtered input architecture, CM jumper installed configuration, and Enhanced LCD Full Numeric HIM makes it a strong choice for large industrial motor-control systems.

The model is especially appropriate for applications where the motor must be operated at variable speed while maintaining controlled acceleration, controlled deceleration, stable process operation, and convenient local access to drive information.

For large pumps, fans, conveyors, compressors, mixers, extruders, material-handling machinery, and heavy process equipment, this configuration provides the physical construction and electrical capacity expected from a large industrial PowerFlex 755 installation.

The most important selection point is to match the drive to the actual motor current and load duty cycle. The 395 A catalog class should not be considered the only selection criterion. Normal Duty and Heavy Duty current requirements can be significantly different, particularly for machines with high starting torque, frequent acceleration, high inertia, or demanding overload requirements.

From an engineering standpoint, the 20G1AJE395JN4NNNNN is best viewed as a large-frame, enclosed, high-power PowerFlex 755 solution for applications where compact general-purpose drives are no longer adequate.

Its enhanced local operator interface, industrial enclosure, high-current power stage, filtered configuration, and common-mode jumper arrangement make it particularly suitable for centralized industrial motor-control installations where maintainability and standardized PowerFlex architecture are important.

For final installation, the exact mechanical drawing, nameplate information, motor data, environmental conditions, and project-specific electrical requirements should be used to confirm the final configuration, especially for dimensions, shipping weight, clearances, thermal management, and lifting arrangements.