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

Allen-Bradley 20G1AJC460JN4NNNNN PowerFlex 755 AC Drive

1. Product Introduction

The Allen-Bradley 20G1AJC460JN4NNNNN is a high-power industrial AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase motor applications where high output current, substantial motor power, protected enclosure construction, network communication and sophisticated local operator control are required.

This model is rated for the 400 VAC class, three-phase input, with a nominal drive output-current class of 460 A.

Its principal power ratings are 315 kW Light Duty, 250 kW Normal Duty and 200 kW Heavy Duty.

The drive uses a Frame 8 power structure and an 800 mm deep MCC-style enclosure. It is an air-cooled, Type 12/IP54 packaged drive configuration with an integrated EMC-filter arrangement and CM jumper installed.

One of the most important characteristics of this particular catalog number is the JN4 configuration, which provides an Enhanced LCD, Full Numeric HIM with IP66/NEMA Type 4X/12 protection. This makes the JN4 version especially useful when local operation, commissioning and maintenance access are important.

The drive also incorporates embedded EtherNet/IP, allowing it to be integrated into a modern industrial automation system without treating the drive as an isolated motor-control device.

---

2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Type	Industrial AC Variable Frequency Drive
Catalog Number	20G1AJC460JN4NNNNN
Drive Configuration	PowerFlex 755 AC Packaged Drive
Voltage Class	400 VAC
Input Phase	3-Phase
Output Current Class	460 A
Light Duty Rating	315 kW
Normal Duty Rating	250 kW
Heavy Duty Rating	200 kW
Frame Size	Frame 8
Cooling	Forced Air
Enclosure	Type 12 / IP54
Cabinet Style	800 mm Deep MCC Style
Input Type	AC Input with Precharge
DC Terminals	None
EMC Configuration	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM Configuration	Enhanced LCD, Full Numeric
HIM Enclosure Protection	IP66 / NEMA Type 4X/12
Communication	Embedded EtherNet/IP
Typical Application	Large industrial motor control

The core catalog description identifies the model as a PowerFlex 755 AC drive with embedded EtherNet/IP, air cooling, AC input with precharge, no DC terminals, Type 12/IP54 800 mm deep MCC-style construction, 460 A capacity and the 315/250/200 kW LD/ND/HD ratings.

---

3. Detailed Technical Parameters

Parameter	Specification
Model / Catalog Number	20G1AJC460JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Product Configuration	AC Packaged Drive
Input Voltage	400 VAC class
Input Phase	3-Phase
Rated Current Class	460 A
Light Duty Power	315 kW
Normal Duty Power	250 kW
Heavy Duty Power	200 kW
Frame Size	Frame 8
Enclosure Type	Type 12 / IP54
Cabinet Style	MCC Style
Cabinet Depth	800 mm
Cooling Method	Forced Air
Input Arrangement	AC Input with Precharge
DC Terminals	None
EMC Filter	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Enhanced LCD, Full Numeric
HIM Protection	IP66 / NEMA Type 4X/12
Communication	Embedded EtherNet/IP
Approx. Width	Approx. 600 mm class*
Approx. Height	Approx. 2,000–2,200 mm class*
Approx. Depth	800 mm*
Approx. Weight	Approx. 500–700 kg class*
Installation	Floor-mounted MCC-style installation
Typical Motor Duty	Light / Normal / Heavy Duty depending on motor load
Typical Applications	Pumps, fans, blowers, conveyors, process equipment
Main Advantage	High-power motor control with local protected HIM

*The 800 mm cabinet depth is part of the published product configuration. Exact width, height and shipping mass should be taken from the applicable mechanical drawing for the exact installed configuration. For preliminary layout work, a Frame 8 enclosure in this class can be treated as approximately 600 mm wide, approximately 2,000–2,200 mm high and approximately 500–700 kg. These figures are engineering-planning estimates rather than certified shipping dimensions. The product documentation provides dimension drawings and 3D mechanical data for final engineering.

---

4. Electrical Rating

The 20G1AJC460JN4NNNNN is a high-current PowerFlex 755 configuration.

Its principal rating is 460 A, with the following application-dependent power ratings:

Duty	Power Rating
Light Duty	315 kW
Normal Duty	250 kW
Heavy Duty	200 kW

These three ratings are important because the correct drive selection depends on the actual load profile rather than motor horsepower or kilowatt rating alone.

A large centrifugal pump, for example, may be able to use the Normal Duty rating, while a high-torque conveyor may require the Heavy Duty rating.

The published selection data for the 400 VAC class identifies the 460 A configuration as a Frame 8 drive with 315 kW Light Duty, 250 kW Normal Duty and 200 kW Heavy Duty capability.

---

5. Light Duty Rating — 315 kW

The 315 kW Light Duty rating is the highest stated kW rating for this model.

Light Duty operation is generally associated with applications having relatively predictable load characteristics and lower overload requirements.

Typical examples include:

• Large centrifugal fans.
• Large centrifugal pumps.
• Ventilation systems.
• Cooling systems.
• Large blowers.
• Air-handling systems.
• Other variable-torque loads.

The Light Duty rating should not automatically be used simply because the motor nameplate power is below 315 kW.

Motor current, acceleration requirements, load inertia and duty cycle must also be checked.

---

6. Normal Duty Rating — 250 kW

The 250 kW Normal Duty rating makes this drive suitable for a broad range of large industrial motor applications.

Normal Duty applications generally involve continuous operation without unusually severe overload requirements.

Typical examples include:

• Process pumps.
• Large water pumps.
• Cooling-water pumps.
• Industrial fans.
• Process blowers.
• Material-handling equipment.
• Large conveyor systems with moderate torque requirements.

The Normal Duty rating is particularly useful for large continuous-process machinery where variable-speed operation is required but the load profile is not exceptionally demanding.

---

7. Heavy Duty Rating — 200 kW

The 200 kW Heavy Duty rating is important for applications involving higher torque requirements.

Heavy Duty applications may include:

• Heavy conveyors.
• Mixers.
• Material-handling systems.
• High-inertia machinery.
• Process machinery.
• Equipment with frequent acceleration.
• Equipment with significant load changes.

When using the Heavy Duty rating, the actual motor full-load current should be compared with the drive’s applicable Heavy Duty current capability.

The motor’s kW value alone should never be the only selection criterion.

---

8. 400 VAC Three-Phase Configuration

The model is designed for the 400 VAC three-phase class.

This makes it suitable for industrial electrical systems operating around the 380–400 VAC range.

The input voltage should be checked carefully before installation.

The following should be confirmed:

• Plant supply voltage.
• Motor rated voltage.
• Motor rated current.
• Motor frequency.
• Motor power.
• Transformer arrangement.
• Short-circuit conditions.
• Grounding system.

A drive with the same current rating but a different voltage class is not automatically interchangeable.

---

9. Frame 8 Construction

The 20G1AJC460JN4NNNNN uses Frame 8 construction.

Frame 8 is intended for high-power industrial drive applications.

The large frame provides the physical space necessary for:

• High-current power conversion.
• Large power conductors.
• Cooling equipment.
• Power semiconductor assemblies.
• Control electronics.
• Service components.
• Industrial cable termination.

The physical installation requirements are therefore considerably different from those of a small machine-mounted VFD.

---

10. 800 mm Deep MCC-Style Enclosure

The drive is supplied in an 800 mm deep MCC-style configuration.

This is an important mechanical characteristic.

The cabinet depth provides the physical space needed for high-power components, high-current conductors, cooling arrangements and industrial cable termination.

For project planning, the 800 mm depth should be incorporated into the electrical-room layout.

Consideration should be given to:

• Front access.
• Door operation.
• Cable routing.
• Cable bend radius.
• Floor space.
• Cooling airflow.
• Maintenance access.
• Transportation route.
• Lifting access.
• Replacement access.

The Frame 8 installation may require appropriate lifting and roll-out equipment during installation or maintenance. The product documentation provides mechanical and installation information specifically for this class of drive.

---

11. Type 12 / IP54 Enclosure

The main drive enclosure is rated Type 12 / IP54.

This is an important advantage for industrial installations.

The enclosure is designed to provide protection against normal industrial dust exposure and incidental water conditions associated with the applicable enclosure rating.

Potential application environments include:

• Manufacturing plants.
• Process plants.
• Water-treatment facilities.
• Industrial utility rooms.
• Mechanical equipment rooms.
• Mining-related electrical rooms.
• Cement and aggregate facilities.

However, Type 12/IP54 should not be interpreted as protection against every harsh environmental condition.

Particular attention should be given to:

• Corrosive gases.
• Conductive dust.
• Salt atmosphere.
• Condensation.
• Chemical vapors.
• High humidity.
• Excessive ambient temperature.

---

12. Forced-Air Cooling

The drive uses forced-air cooling.

This is necessary because a 460 A high-power VFD produces considerable thermal losses during operation.

The cooling system should therefore be treated as a critical part of the drive installation.

The installation should provide:

• Adequate airflow.
• Correct ventilation.
• Clean cooling air.
• Appropriate cabinet clearances.
• Proper fan operation.
• Periodic filter inspection.
• Removal of accumulated dust.

A high-power drive can be electrically healthy but still experience reduced reliability if its cooling system is neglected.

---

13. AC Input with Precharge

The drive uses an AC input with precharge and no DC terminals.

The precharge system controls the initial charging of the drive’s internal DC bus.

This is particularly important in a large drive because the DC-bus capacitors represent a substantial electrical load when initially energized.

The precharge arrangement allows the DC bus to be established in a controlled manner.

The absence of external DC terminals also distinguishes this configuration from certain alternative drive architectures.

---

14. EMC Filtering

The 20G1AJC460JN4NNNNN is configured with EMC filtering and the CM jumper installed.

EMC considerations are particularly important for large VFD installations.

The high-frequency switching operation of a variable frequency drive can produce conducted and radiated electrical noise.

The overall installation should therefore consider:

• Motor cable construction.
• Cable shielding.
• Grounding.
• Cabinet bonding.
• Motor-frame grounding.
• Separation of control and power wiring.
• Cable routing.
• Communication cable routing.

The integrated filter is part of the drive configuration but does not replace correct installation practices.

---

15. Common-Mode Configuration

The catalog configuration includes the CM jumper installed.

The common-mode configuration affects the drive’s relationship with the grounding system and internal EMC components.

This should be considered when designing the electrical installation.

Changing the grounding or common-mode arrangement without reviewing the complete electrical system can affect:

• Common-mode current.
• Leakage current.
• EMC performance.
• Ground-current behavior.
• Sensitive electronic equipment.

For large industrial systems, grounding should be treated as an overall system design issue rather than simply a drive accessory issue.

---

16. Dynamic Braking

The 20G1AJC460JN4NNNNN does not include an internal dynamic-braking transistor.

This characteristic should be checked carefully before ordering.

The absence of dynamic braking does not prevent the drive from controlling acceleration and normal deceleration.

It means that the drive does not include the internal braking-transistor configuration used by certain other PowerFlex 755 catalog variants.

For loads with high stored kinetic energy, the system designer must determine how regenerative energy will be managed.

---

17. Braking Requirements

Braking should receive special attention in applications involving:

• High-inertia fans.
• Large centrifuges.
• Heavy conveyors.
• Rapid stopping.
• Large flywheels.
• High-speed machinery.
• Certain hoisting systems.

If the process requires rapid deceleration, the application should be evaluated for:

• Required stopping time.
• Motor inertia.
• Load inertia.
• Regenerated energy.
• Mechanical braking.
• External braking arrangements.
• Regenerative drive requirements.

The correct solution depends on the machine and its kinetic-energy profile.

---

18. JN4 Configuration and HIM

The JN4 portion of the catalog number is particularly important.

The 20G1AJC460JN4NNNNN is supplied with an Enhanced LCD, Full Numeric HIM.

The HIM has IP66 / NEMA Type 4X/12 protection.

This is one of the main differences between this model and the closely related 20G1AJC460JN0NNNNN.

Characteristic	JN0	JN4
Local HIM	Blank / No HIM	Enhanced LCD, Full Numeric
Local Display	No standard HIM	Yes
Local Parameter Access	Limited without separate interface	Convenient local access
HIM Environmental Protection	N/A	IP66 / NEMA Type 4X/12
Suitable for Local Commissioning	Requires additional interface	Stronger local-access configuration
Catalog Number	20G1AJC460JN0NNNNN	20G1AJC460JN4NNNNN

The JN4 configuration is therefore particularly attractive where technicians need a local interface for commissioning, troubleshooting or parameter adjustment.

---

19. Enhanced LCD Full Numeric HIM

The enhanced local interface provides a practical advantage in large industrial installations.

Technicians can use the local interface for tasks such as:

• Parameter inspection.
• Parameter adjustment.
• Drive status checking.
• Fault investigation.
• Commissioning.
• Local troubleshooting.
• Basic operational checks.

This is especially useful when the drive is located in an electrical room where a technician needs direct access to the drive without connecting an external programming device.

---

20. IP66 / NEMA Type 4X/12 HIM

The HIM itself has a substantially higher environmental protection level than the basic drive cabinet description.

The IP66/NEMA Type 4X/12 interface is intended for industrial local-control applications where the operator interface may be exposed to more demanding conditions.

This makes the JN4 configuration particularly attractive for:

• Industrial maintenance areas.
• Manufacturing plants.
• Process equipment.
• Pumping systems.
• Water-treatment facilities.
• Dust-prone industrial environments.

The HIM protection should not be confused with the complete drive enclosure rating.

The main drive is specified as Type 12/IP54, while the local HIM has its own IP66/NEMA Type 4X/12 protection specification.

---

21. Embedded EtherNet/IP

The model incorporates embedded EtherNet/IP.

This allows the drive to become a networked automation device.

A typical architecture can be represented as:

PLC

↓

Industrial Ethernet Network

↓

PowerFlex 755

↓

Large AC Motor

The control system can exchange information with the drive, including:

• Start commands.
• Stop commands.
• Speed reference.
• Actual speed.
• Current.
• Frequency.
• Status.
• Faults.
• Warnings.
• Diagnostic information.

This reduces dependence on conventional point-to-point control wiring for many functions.

---

22. Industrial Automation Integration

The PowerFlex 755 platform is well suited to centralized automation.

In a large plant, multiple drives can be integrated into the same control architecture.

This can simplify:

• PLC programming.
• HMI monitoring.
• Fault diagnostics.
• Drive parameter management.
• Preventive maintenance.
• Operator training.
• Troubleshooting.

The 20G1AJC460JN4NNNNN is therefore more than a simple speed controller.

It can function as an integrated motor-control node within a larger automation system.

---

23. Main Product Applications

Large Pump Systems

Large pumps are one of the most suitable applications for this drive.

Typical applications include:

• Raw-water pumps.
• Cooling-water pumps.
• Process pumps.
• Transfer pumps.
• Industrial circulation pumps.
• Wastewater pumps.
• Large irrigation pumps.

The drive can provide controlled motor speed, soft starting and process-based speed adjustment.

---

24. Large Fan Systems

The drive can be used for large fans such as:

• Exhaust fans.
• Furnace fans.
• Cooling fans.
• Ventilation systems.
• Dust-collection fans.
• Air-handling systems.
• Process ventilation.

Variable-speed operation can help match airflow to actual process demand.

For large fans with high inertia, however, stopping requirements should be evaluated carefully because this model does not include an internal dynamic-braking transistor.

---

25. Large Blowers

Large industrial blowers can require substantial motor power.

Typical applications include:

• Process air.
• Combustion air.
• Pneumatic conveying.
• Industrial ventilation.
• Wastewater aeration.
• Dust collection.

The drive provides controlled speed operation and can be integrated with plant automation.

---

26. Conveyor Systems

The 20G1AJC460JN4NNNNN is also suitable for large conveyors.

Potential applications include:

• Mining conveyors.
• Aggregate conveyors.
• Cement conveyors.
• Bulk-material conveyors.
• Production conveyors.
• Long-distance transfer conveyors.

The VFD can provide controlled acceleration and adjustable operating speed.

Potential benefits include:

• Reduced mechanical shock.
• Reduced belt stress.
• Reduced gearbox stress.
• Controlled startup.
• Adjustable throughput.
• Better process synchronization.

For high-inertia conveyor systems, braking requirements must be evaluated separately.

---

27. Mining Applications

The large-current capacity makes the drive suitable for many mining-related motor applications.

Potential uses include:

• Conveyor drives.
• Dewatering pumps.
• Ventilation fans.
• Material-transfer systems.
• Process pumps.
• Large auxiliary equipment.

Mining environments can be demanding, so enclosure, dust, cooling and maintenance conditions should be evaluated carefully.

---

28. Cement and Aggregate Applications

Cement and aggregate plants often contain large motor-driven equipment.

Possible applications include:

• Conveyors.
• Fans.
• Pumps.
• Feeders.
• Process machinery.
• Cooling systems.
• Material-handling equipment.

The Type 12/IP54 configuration can provide a useful level of protection in industrial electrical rooms.

However, dust accumulation should still be controlled through proper enclosure maintenance and cooling-system inspection.

---

29. Water and Wastewater Applications

Large water-treatment facilities may use high-power drives for:

• Water pumps.
• Booster pumps.
• Process pumps.
• Large blowers.
• Aeration equipment.
• Sludge-handling equipment.

The combination of high power, EtherNet/IP communication and local HIM access can be useful for centralized plant operation and maintenance.

---

30. Process Industry Applications

The drive can be used for a variety of process-industry machines, including:

• Pumps.
• Fans.
• Blowers.
• Mixers.
• Conveyors.
• Agitators.
• Material-handling equipment.
• Process machinery.

The exact suitability depends on motor current, torque profile, acceleration requirements and environmental conditions.

---

31. Main Product Advantages

31.1 High 460 A Current Capability

The 460 A current class makes the drive suitable for large industrial motors.

This is one of its most important characteristics.

---

31.2 250 kW Normal Duty Capability

The 250 kW Normal Duty rating covers a broad range of large industrial applications.

---

31.3 200 kW Heavy Duty Capability

The Heavy Duty rating provides additional flexibility for applications with higher torque demands.

---

31.4 315 kW Light Duty Capability

The Light Duty rating permits the drive to be applied to larger variable-torque loads where the operating profile permits it.

---

31.5 Frame 8 High-Power Architecture

The Frame 8 design is suitable for large industrial motor-control systems.

---

31.6 Type 12 / IP54 Enclosure

The protected enclosure is appropriate for many industrial electrical environments.

---

31.7 800 mm MCC-Style Cabinet

The large cabinet format provides the physical space needed for high-current equipment and industrial cable arrangements.

---

31.8 Embedded EtherNet/IP

Integrated industrial Ethernet communication simplifies automation integration.

---

31.9 Enhanced Local HIM

The JN4 configuration provides a significant practical advantage over no-HIM configurations.

The technician can access the drive locally for commissioning and maintenance.

---

31.10 IP66 / NEMA Type 4X/12 HIM

The enhanced operator interface is designed for demanding industrial environments.

---

31.11 EMC Filtering

The filtered configuration supports installations where electromagnetic compatibility is important.

---

31.12 Precharge Input Arrangement

The AC input with precharge provides a controlled initial charging process for the internal DC bus.

---

32. Mechanical Dimensions

Because this is a large Frame 8 packaged drive, mechanical planning is important.

Mechanical Parameter	Approximate / Published Value
Model	20G1AJC460JN4NNNNN
Frame	Frame 8
Enclosure	Type 12 / IP54
Cabinet Style	MCC Style
Published Depth	800 mm
Approx. Width	600 mm class*
Approx. Height	2,000–2,200 mm class*
Approx. Depth	800 mm*
Approx. Weight	500–700 kg class*
Cooling	Forced Air
Installation Type	Floor-mounted
Local HIM	Door/front-mounted configuration
Recommended Planning Approach	Verify exact dimension drawing

*Approximate planning values. The actual dimensions and weight can vary with the exact packaged configuration, options and mechanical arrangement. The published product page provides dimension drawings and 3D mechanical documentation, so the final cabinet dimensions should be taken from the exact engineering drawing before fabrication or installation.

---

33. Weight Considerations

The weight of a Frame 8, 460 A, 800 mm-deep MCC-style drive is substantial.

For preliminary engineering, it is reasonable to treat the complete equipment as being in the 500–700 kg class.

However, the final project documentation should use the actual manufacturer-certified shipping and installation weight.

This is especially important for:

• Floor loading.
• Forklift selection.
• Crane selection.
• Transportation.
• Lifting points.
• Installation foundations.
• Cabinet positioning.

The JN4 HIM does not significantly change the fundamental Frame 8 cabinet scale, but the final installed configuration should always be checked.

---

34. Installation Requirements

The installation area should provide sufficient:

• Front clearance.
• Side clearance where applicable.
• Cooling airflow.
• Door-opening space.
• Maintenance access.
• Cable-entry space.
• Lifting access.
• Replacement access.

The 800 mm cabinet depth should be included in the initial electrical-room layout.

---

35. Cooling Requirements

Forced-air cooling means that heat removal is an important part of the installation.

The electrical room should provide:

• Suitable ambient temperature.
• Adequate air exchange.
• Clean cooling air.
• Appropriate ventilation.
• No blocked airflow paths.
• Regular fan inspection.
• Regular filter maintenance.

A high-power VFD should not be installed in a confined location simply because its electrical connection can be accommodated.

Thermal management is equally important.

---

36. Motor Selection Requirements

The motor should be evaluated using actual nameplate data.

Motor Parameter	Selection Requirement
Motor Voltage	Match drive voltage class
Motor Current	Must fit applicable drive current rating
Motor Power	Compare LD/ND/HD rating
Frequency	Confirm operating frequency
Speed	Verify required operating range
Starting Torque	Evaluate
Continuous Torque	Evaluate
Motor Inertia	Evaluate
Load Inertia	Evaluate
Acceleration Time	Evaluate
Deceleration Time	Evaluate
Motor Insulation	Suitable for VFD operation
Cable Length	Evaluate
Grounding	Confirm

---

37. Why Motor Current Matters

The kW rating alone does not determine whether the drive is suitable.

Two motors with identical rated power can have different:

• Full-load current.
• Efficiency.
• Power factor.
• Torque characteristics.
• Speed.
• Starting requirements.

For this reason, the motor nameplate current should be one of the first values checked when selecting the drive.

---

38. Pump Application Advantages

For large pump systems, the drive can provide:

• Variable-speed control.
• Controlled acceleration.
• Reduced mechanical shock.
• Process flow adjustment.
• Pressure control.
• Remote monitoring.
• Centralized control.

The embedded EtherNet/IP connection is particularly useful where pumps are integrated into a centralized water or process-control system.

---

39. Fan Application Advantages

For large fans, the drive can provide:

• Variable airflow.
• Smooth starting.
• Speed control.
• Remote monitoring.
• Process synchronization.
• Reduced need for mechanical throttling.

Large fan inertia should be considered when selecting acceleration and deceleration profiles.

---

40. Conveyor Application Advantages

For conveyors, the drive can provide:

• Controlled starting.
• Adjustable speed.
• Reduced mechanical shock.
• Process coordination.
• Remote diagnostics.
• Improved production control.

The actual conveyor application should be evaluated for starting torque and stopping requirements.

---

41. HIM-Based Commissioning Advantages

The JN4 configuration is particularly valuable during commissioning.

A technician can work directly at the drive rather than relying exclusively on the central PLC or a remote engineering workstation.

Typical local activities include:

• Parameter checking.
• Status verification.
• Fault inspection.
• Basic configuration.
• Speed reference verification.
• Motor-direction checking.
• Startup troubleshooting.

This can significantly reduce commissioning time on large installations.

---

42. Maintenance Advantages of the JN4 Version

During maintenance, the local HIM can provide direct access to drive information.

This is useful when:

• Network communication is unavailable.
• The PLC is offline.
• A technician is working at the cabinet.
• A fault must be investigated locally.
• Parameters need to be verified.
• The motor needs to be tested.

The enhanced LCD/full-numeric interface is therefore more than an operator convenience.

It can be a useful maintenance tool.

---

43. JN4 Versus JN0

The following comparison is particularly useful when choosing between the two closely related configurations.

Feature	20G1AJC460JN0NNNNN	20G1AJC460JN4NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	400 VAC	400 VAC
Current	460 A	460 A
LD	315 kW	315 kW
ND	250 kW	250 kW
HD	200 kW	200 kW
Frame	8	8
Enclosure	Type 12/IP54	Type 12/IP54
Depth	800 mm	800 mm
Cooling	Forced Air	Forced Air
EMC Filter	Yes	Yes
CM Jumper	Installed	Installed
Dynamic Braking	None	None
HIM	Blank / No HIM	Enhanced LCD, Full Numeric
HIM Protection	N/A	IP66/NEMA Type 4X/12
Best Fit	Remote/networked control	Local + networked control

The JN4 model is therefore generally the more attractive choice when local operator or maintenance access is required.

---

44. Five Recommended Same-Series / Related Models

The following five models are useful comparisons within the same PowerFlex 755 400 VAC high-power family.

Model	Voltage	LD Rating	ND Rating	HD Rating	Frame	Main Difference
20G1AJC460JN4NNNNN	400 VAC	315 kW	250 kW	200 kW	8	Reference JN4 configuration with enhanced HIM
20G1AJC540JN4NNNNN	400 VAC	315 kW	315 kW	250 kW	8	Higher current and ND capacity
20G1AJC567JN4NNNNN	400 VAC	355 kW	315 kW	250 kW	8	Higher current capacity
20G1AJC650JN4NNNNN	400 VAC	400 kW	355 kW	315 kW	8	Higher-power industrial applications
20G1AJC750JN4NNNNN	400 VAC	450 kW	400 kW	315 kW	8	Very high-power applications

The published selection data confirms the progression of the 400 VAC family from the 460 A configuration through the 540 A, 567 A and larger Frame 8 configurations.

---

45. Same-Series Current Comparison

Model	Approx. ND Continuous Current	ND Power	Approx. HD Continuous Current	HD Power
20G1AJC460JN4NNNNN	460 A	250 kW	385 A class	200 kW
20G1AJC540JN4NNNNN	540 A	315 kW	456 A class	250 kW
20G1AJC567JN4NNNNN	567 A	315 kW	472 A class	250 kW
20G1AJC650JN4NNNNN	650 A	355 kW	540 A class	315 kW
20G1AJC750JN4NNNNN	750 A	400 kW	585 A class	315 kW

The selection guide provides the detailed continuous and overload current values for these high-power configurations.

---

46. How to Choose Among the Related Models

The 20G1AJC460JN4NNNNN is appropriate when the motor and application fall within the 460 A / 250 kW Normal Duty class.

The 20G1AJC540JN4NNNNN should be considered when additional current capacity is required.

The 20G1AJC567JN4NNNNN is useful when the motor requires a higher current rating but remains within the same general voltage and Frame 8 architecture.

The 20G1AJC650JN4NNNNN is appropriate for significantly larger motor systems.

The 20G1AJC750JN4NNNNN is intended for very high-power industrial applications.

The selection should always be based on actual motor current and application duty rather than choosing a larger drive simply because its kW rating is higher.

---

47. Five Popular Allen-Bradley Models

The following models provide a useful selection of popular drives from the same brand across different power levels and applications.

Model	Series	Voltage Class	Main Rating	Typical Application
25B-D030N114	PowerFlex 525	480 VAC class	30 A class	General industrial machines
25C-D030N114	PowerFlex 523	480 VAC class	30 A class	Compact motor-control applications
20G1AGE053JA0NNNNN	PowerFlex 755	600 VAC	53 A / 50 HP ND	Medium industrial motors
20G1AGC260JN0NNNNN	PowerFlex 755	400 VAC	260 A / 132 kW ND	Large pumps and fans
20G1AND302JA0NNNNN	PowerFlex 755	480 VAC	302 A / 250 HP ND	Large industrial motor systems

These models represent different sections of the PowerFlex portfolio and can be considered when the application requirements differ from those of the 460 A Frame 8 configuration.

---

48. Popular Model Comparison

Model	Relative Size	Main Advantage	Typical Application
25B-D030N114	Small	Compact general-purpose control	Production machinery
25C-D030N114	Small	Simple compact VFD	Machine applications
20G1AGE053JA0NNNNN	Medium	600 VAC motor control	Pumps, fans and industrial equipment
20G1AGC260JN0NNNNN	Large	High-current 400 VAC control	Large pumps and process machinery
20G1AND302JA0NNNNN	Large	302 A / 250 HP ND class	Large industrial motor systems

---

49. Recommended Applications by Duty

Application	Typical Duty	Reason
Large Centrifugal Pump	Normal Duty	Stable variable-torque load
Large Cooling Fan	Light Duty	Relatively predictable fan load
Large Process Fan	Light / Normal Duty	Variable process demand
Large Blower	Normal Duty	Continuous process operation
Heavy Conveyor	Heavy Duty	High acceleration torque
Bulk Material Conveyor	Heavy Duty	Variable mechanical load
Large Mixer	Heavy Duty	High torque requirement
Water Pump	Normal Duty	Continuous process operation
Wastewater Blower	Normal Duty	Continuous motor operation
Large Exhaust Fan	Light Duty	Variable-torque application
High-Inertia Machinery	Engineering Review	Deceleration requirements
Hoisting Equipment	Engineering Review	Braking and safety considerations

---

50. Industrial Automation Advantages

The combination of embedded EtherNet/IP and a local enhanced HIM is one of the strongest features of this particular configuration.

The network can be used for centralized control while the local HIM can be used for direct service and commissioning.

This gives the installation two practical control levels:

Central Control

PLC → EtherNet/IP → Drive

and

Local Service

Technician → HIM → Drive

This combination is particularly useful in large plants.

---

51. Fault Diagnosis

A networked drive can provide operational information to the automation system.

Typical information includes:

• Drive running status.
• Drive fault status.
• Warning conditions.
• Motor current.
• Output frequency.
• Speed.
• Command reference.
• Actual operating condition.

At the same time, the local HIM provides technicians with direct access to drive information.

This combination can reduce diagnostic time.

---

52. Commissioning Advantages

During commissioning, the technician normally needs to verify:

• Input power.
• Motor connection.
• Motor rotation.
• Motor parameters.
• Speed reference.
• Acceleration.
• Deceleration.
• Fault behavior.
• Communication.
• I/O behavior.

The JN4 local interface can simplify many of these tasks.

This is particularly useful for large equipment where the drive may be located far away from the main control-room workstation.

---

53. Maintenance Planning

The drive should be included in a formal preventive-maintenance program.

Maintenance Area	Inspection
Cooling Fans	Check operation
Air Filters	Inspect and clean
Cabinet	Check contamination
Power Terminals	Check for heat and looseness
Grounding	Verify
Motor Cable	Inspect
Control Wiring	Inspect
Network	Check EtherNet/IP status
HIM	Check display and controls
Parameters	Maintain backup
Fault History	Review recurring faults
Temperature	Monitor abnormal heating
Cabinet Structure	Inspect condition

---

54. Cooling-System Maintenance

The cooling system deserves special attention.

Maintenance should include:

• Fan inspection.
• Air-filter inspection.
• Dust removal.
• Airflow inspection.
• Abnormal-noise inspection.
• Temperature monitoring.

A dirty cooling path can increase operating temperature and shorten the service life of internal components.

For a large 460 A drive, cooling maintenance should not be treated as a minor task.

---

55. Spare Parts Planning

For large PowerFlex 755 systems, spare-parts planning can be important.

Potential service components may include:

• Cooling fans.
• Filters.
• Control components.
• Interface components.
• Communication-related components.
• Power-stage components.
• Fuses.
• Terminal hardware.
• Mechanical components.

The exact spare-parts list should be established according to the final installed configuration.

---

56. Electrical Installation Considerations

Because the drive operates at high current, the installation should carefully address:

• Input conductor sizing.
• Output conductor sizing.
• Grounding.
• Short-circuit protection.
• Motor cable routing.
• Cable separation.
• EMC.
• Terminal torque.
• Cabinet ventilation.
• Electrical clearances.

The exact installation must follow the applicable technical documentation and project electrical standards.

---

57. Cable Selection

The 460 A class requires substantial power conductors.

Cable selection should consider:

• Continuous current.
• Ambient temperature.
• Cable grouping.
• Installation method.
• Voltage drop.
• Motor cable length.
• EMC requirements.
• Ground conductor sizing.
• Termination space.

The cabinet’s 800 mm depth provides considerable installation space, but cable bend radius and termination arrangements still need to be designed carefully.

---

58. Motor Cable and EMC

Motor cables can be an important source of electrical noise in a VFD system.

Good installation practice includes:

• Correct grounding.
• Proper cable routing.
• Appropriate shielding where required.
• Separation from sensitive signal wiring.
• Proper cabinet bonding.
• Correct motor-frame grounding.

The integrated EMC filter should therefore be considered one part of the complete EMC design.

---

59. Environmental Reliability

The Type 12/IP54 enclosure and protected JN4 HIM provide a useful level of industrial protection.

However, reliability also depends on:

• Ambient temperature.
• Dust concentration.
• Humidity.
• Condensation.
• Corrosive gases.
• Cooling-air quality.
• Maintenance.
• Power quality.

A protected enclosure cannot compensate for a severely contaminated or thermally unsuitable installation.

---

60. Product Advantages in Different Industries

Industry	Main Advantage
Water Treatment	High-power pump and blower control
Mining	Large conveyor and pump control
Cement	Large fan and material-handling control
Manufacturing	Centralized automation
Chemical Processing	Large pump and process-machine control
Steel	Large motor speed control
Utilities	Pump and fan regulation
HVAC	Large fan and blower control
Material Handling	Controlled acceleration
Aggregate Processing	High-power conveyor and feeder control

---

61. Product Selection Checklist

Before purchasing or replacing the drive, verify:

Item	Verification
Catalog Number	20G1AJC460JN4NNNNN
Input Voltage	400 VAC class
Input Phase	3-Phase
Motor Current	Confirm against drive rating
Motor Power	Confirm
Duty	LD / ND / HD
Frame	Frame 8
Enclosure	Type 12/IP54
Cabinet Depth	800 mm
Cooling	Forced Air
Dynamic Braking	None
EMC	Filtered
CM Jumper	Installed
HIM	Enhanced LCD Full Numeric
HIM Protection	IP66/NEMA Type 4X/12
Network	Embedded EtherNet/IP
Dimensions	Verify final drawing
Weight	Verify final shipping data
Cable Entry	Verify
Maintenance Access	Verify
Braking Requirements	Verify

---

62. Important Difference Between the Drive and the HIM Protection

One point is worth emphasizing.

The main drive enclosure is specified as:

Type 12 / IP54

while the JN4 local HIM is specified as:

IP66 / NEMA Type 4X/12

These are not contradictory specifications.

They refer to different components.

The drive cabinet provides the main equipment enclosure protection, while the local operator interface has its own environmental protection specification.

---

63. Why the JN4 Configuration Is Attractive

For a large industrial drive, the local operator interface can be extremely useful.

A completely remote drive configuration may be acceptable for an automated plant, but maintenance technicians often need direct access to:

• Drive parameters.
• Fault information.
• Operating status.
• Motor speed.
• Frequency.
• Local diagnostic functions.

The JN4 configuration addresses this requirement without changing the fundamental 460 A Frame 8 power architecture.

---

64. Overall Technical Assessment

The Allen-Bradley 20G1AJC460JN4NNNNN is a high-power PowerFlex 755 variable frequency drive designed for large industrial motor systems.

Its principal electrical characteristics are:

• 400 VAC
• 3-phase
• 460 A
• 315 kW Light Duty
• 250 kW Normal Duty
• 200 kW Heavy Duty
• Frame 8

Its principal mechanical characteristics are:

• Type 12/IP54
• 800 mm deep MCC-style enclosure
• Forced-air cooling

Its principal control characteristics are:

• Embedded EtherNet/IP
• Enhanced LCD
• Full Numeric HIM
• IP66/NEMA Type 4X/12 HIM

Its principal power-system characteristics are:

• AC input with precharge
• No DC terminals
• EMC filtered
• CM jumper installed
• No dynamic-braking transistor

These characteristics make the drive particularly suitable for large industrial installations where both centralized automation and local maintenance access are important.

---

65. Final Technical Summary

Category	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Catalog Number	20G1AJC460JN4NNNNN
Product Type	Industrial AC Variable Frequency Drive
Input Voltage	400 VAC
Input Phase	3-Phase
Output Current	460 A
Light Duty	315 kW
Normal Duty	250 kW
Heavy Duty	200 kW
Frame	Frame 8
Main Enclosure	Type 12 / IP54
Cabinet Depth	800 mm
Cabinet Style	MCC Style
Cooling	Forced Air
Input	AC with Precharge
DC Terminals	None
EMC	Filtered
CM Jumper	Installed
Dynamic Braking	None
Communication	Embedded EtherNet/IP
HIM	Enhanced LCD, Full Numeric
HIM Protection	IP66 / NEMA Type 4X/12
Approx. Width	600 mm class*
Approx. Height	2,000–2,200 mm class*
Approx. Depth	800 mm*
Approx. Weight	500–700 kg class*
Main Applications	Pumps, fans, blowers, conveyors
Industrial Applications	Mining, water treatment, cement, process industries
Major Advantage	High-power control with local protected HIM
Closely Related Configuration	20G1AJC460JN0NNNNN

*Approximate engineering-planning values. Final dimensions and actual weight should be confirmed from the exact mechanical and shipping documentation before fabrication, transportation, lifting or installation.

---

66. Final Product Description

The Allen-Bradley 20G1AJC460JN4NNNNN PowerFlex 755 AC Drive is a large-frame industrial variable frequency drive designed for high-power three-phase motor control.

Its 460 A current capacity and 315 kW Light Duty, 250 kW Normal Duty and 200 kW Heavy Duty ratings place it in the high-power segment of the PowerFlex 755 family.

The 400 VAC three-phase configuration is appropriate for industrial electrical systems operating in the 380–400 VAC class.

The Frame 8, 800 mm deep MCC-style enclosure provides the physical structure required for high-current industrial power conversion, while the Type 12/IP54 configuration provides a protected installation format suitable for many industrial electrical environments.

The drive uses forced-air cooling, making ventilation and cooling-system maintenance important parts of the installation design.

The embedded EtherNet/IP capability allows the drive to communicate directly with a modern industrial automation system.

This is particularly useful in large plants where motor drives need to be integrated with PLCs, HMIs and centralized diagnostic systems.

The most distinctive feature of the JN4 version is its Enhanced LCD Full Numeric HIM.

With IP66/NEMA Type 4X/12 protection, the local interface provides technicians with direct access to drive information and operating functions while retaining the large industrial Frame 8 power architecture.

This makes the JN4 configuration especially suitable for installations where both remote automation and local service access are required.

The drive’s EMC-filtered configuration and installed CM jumper provide a useful starting point for industrial EMC design, although grounding, shielding, cable routing and motor-cable practices remain essential.

The model uses AC input with precharge and no DC terminals, which defines its power-input architecture.

The model also has no internal dynamic-braking transistor, so high-inertia applications requiring rapid stopping should be evaluated carefully before final selection.

For pumps, fans, blowers and many continuous-process applications, the absence of internal braking may not be a significant issue.

For high-inertia conveyors, centrifuges and other applications with substantial regenerative energy, the braking strategy should be considered as part of the overall machine design.

From a practical engineering standpoint, the 20G1AJC460JN4NNNNN is best suited to large industrial motor systems where the project requires a combination of:

• High current capacity.
• High motor power.
• Protected enclosure construction.
• Forced-air cooling.
• Embedded EtherNet/IP.
• Local operator access.
• Enhanced diagnostic capability.
• Standardized PowerFlex 755 architecture.

The strongest related alternatives are the 20G1AJC540JN4NNNNN, 20G1AJC567JN4NNNNN, 20G1AJC650JN4NNNNN and 20G1AJC750JN4NNNNN, which provide progressively greater current and power capability within the same general 400 VAC high-power family.

For projects where the motor current is around the 460 A class and the application requires 250 kW Normal Duty or 200 kW Heavy Duty, while local commissioning and maintenance access are important, the 20G1AJC460JN4NNNNN is a particularly well-balanced configuration.

In short, this model combines a large 460 A Frame 8 PowerFlex 755 drive, Type 12/IP54 800 mm MCC-style construction, embedded EtherNet/IP, and an IP66/NEMA Type 4X/12 enhanced full-numeric LCD HIM into a configuration intended for demanding industrial motor-control applications.