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Allen-Bradley 20G14TC650JN0NNNNN PowerFlex 755 AC Drive — Detailed Product Specifications, Applications, Advantages and Related Models

1. Product Overview

The Allen-Bradley 20G14TC650JN0NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for large industrial motor-control applications.

It is a 400 VAC, three-phase, DC-input drive with precharge, configured as an Open Type Frame 8 unit. With a 650 A Normal Duty rating, the drive is intended for large motors and demanding industrial machinery where high current capacity, reliable speed control, network communication, and flexible system architecture are required.

The model provides three different duty ratings, allowing it to be applied to different types of industrial loads:

• 750 A Light Duty
• 650 A Normal Duty
• 540 A Heavy Duty

The corresponding power ratings are approximately:

• 400 kW Light Duty
• 355 kW Normal Duty
• 315 kW Heavy Duty

This makes the 20G14TC650JN0NNNNN one of the larger PowerFlex 755 Frame 8 configurations and a practical choice for high-power industrial applications.

The drive is especially suitable for large pumps, fans, conveyors, process machinery, mining equipment, steel-processing equipment, cement and aggregate machinery, paper and pulp equipment, and multi-drive common-DC-bus systems.

The JN configuration is also significant. It specifies the version with filtering and the CM jumper installed, making this configuration different from the corresponding AN version.

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2. Brand and Product Series

Product Information	Specification
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Product Type	PowerFlex Air-Cooled 755 AC Drive
Model / Catalog Number	20G14TC650JN0NNNNN
Drive Type	High-Power Industrial AC Drive
Voltage Class	400 VAC
Phase	3 Phase
Input Configuration	DC Input with Precharge
Nominal DC Input Class	540 VDC
Frame Size	Frame 8
Construction	Open Type
Cooling	Air Cooled / Forced Air
Dynamic Braking	None
Dynamic Braking Transistor	Not Included
Internal Braking Resistor	Not Included
Filtering	Filtered
CM Jumper	Installed
Human Interface Module	Blank / No HIM
Communication	Embedded EtherNet/IP
Main Application	High-Power Industrial Motor Control

The PowerFlex 755 series is positioned for applications requiring significantly more capacity and flexibility than compact industrial drives.

It is designed for large machines and process systems where motor current, torque control, speed regulation, communication, feedback, and system integration are important considerations.

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3. Complete Technical Parameter Table

Parameter	Specification
Model / Part Number	20G14TC650JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	Air-Cooled AC Drive
Input Voltage	400 VAC
Input Phase	3 Phase
Input Type	DC Input with Precharge
Nominal DC Input Class	540 VDC
Light Duty Current	750 A
Light Duty Power	400 kW
Normal Duty Current	650 A
Normal Duty Power	355 kW
Heavy Duty Current	540 A
Heavy Duty Power	315 kW
Frame Size	Frame 8
Enclosure / Construction	Open Type
Cooling Method	Forced Air
Dynamic Braking	None
Internal Braking Transistor	No
Internal Braking Resistor	No
Filtering	Filtered
CM Jumper	Installed
HIM	Blank / No HIM
Embedded Communication	EtherNet/IP
Operating Temperature	Approximately 0–50 °C, configuration dependent
Relative Humidity	Approximately 5–95%, non-condensing
Storage Temperature	Approximately -40 to +70 °C
Approx. Height	2145 mm
Approx. Width	778 mm
Approx. Depth	421 mm
Approx. Dimensions	2145 × 778 × 421 mm
Approx. Weight	162 kg
Installation	Industrial Cabinet / Electrical Room
Common DC Bus	Suitable
Primary Application	Large Industrial Motor Control

The dimensions and weight are practical reference values for the Frame 8 drive configuration. The final installation footprint can be larger because cabinet structures, busbars, protective devices, cooling equipment, wiring ducts, terminals, and other components are not included in the basic drive dimensions.

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4. Electrical Rating

The most important electrical characteristic of the 20G14TC650JN0NNNNN is its 650 A Normal Duty rating.

This allows the drive to control large industrial motors in the approximately 355 kW Normal Duty power class.

The drive also provides different current and power ratings depending on the application duty.

Duty Rating	Continuous Output Current	Approx. Power Rating
Light Duty	750 A	400 kW
Normal Duty	650 A	355 kW
Heavy Duty	540 A	315 kW

These three ratings are important because the same motor power does not necessarily represent the same mechanical demand.

A large centrifugal pump and a heavy crusher may have completely different torque and overload characteristics even when their motor power ratings are similar.

For this reason, drive selection should always consider motor current and actual duty cycle.

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5. Light Duty Rating

The drive provides a 750 A Light Duty rating with approximately 400 kW power capability.

Light Duty is generally associated with applications where the motor load does not require the same degree of overload capability as a demanding constant-torque machine.

Typical examples may include appropriately sized:

• Centrifugal pumps
• Large fans
• Certain ventilation systems
• Some water systems
• Certain variable-torque process loads

The Light Duty rating should not automatically be used simply because the motor nameplate is below 400 kW.

The actual load characteristics need to be evaluated.

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6. Normal Duty Rating

The 650 A / 355 kW Normal Duty rating is the primary rating for many general industrial applications.

This is the rating most likely to be used when comparing the drive with a conventional large industrial motor.

For a motor whose full-load current falls within the 650 A Normal Duty capability, the drive can provide substantial capacity for large industrial machinery, assuming the voltage, duty cycle, overload requirements, temperature, and other installation conditions are appropriate.

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7. Heavy Duty Rating

The Heavy Duty rating is:

540 A / 315 kW

This rating is especially important for applications where the machine requires greater torque or more demanding overload performance.

Potential examples include:

• Heavy conveyors
• Crushers
• Mixers
• Certain material-handling systems
• Large process machinery
• High-inertia equipment
• Machinery with frequent acceleration

The Heavy Duty rating should be checked against the actual motor full-load current and required overload profile.

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8. 400 VAC Three-Phase System

The 20G14TC650JN0NNNNN is designed for a 400 VAC three-phase system.

This voltage class is commonly associated with industrial power systems operating around the 380–415 VAC range.

The drive should be matched to the actual plant electrical system.

It should not be considered interchangeable with a 480 VAC or 690 VAC drive simply because the motor power is similar.

The voltage class affects:

• DC bus voltage
• Motor insulation
• Electrical clearances
• Protective devices
• Cable selection
• System grounding
• Drive configuration
• Overall power-system design

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9. DC Input with Precharge

The catalog configuration specifies DC Input with Precharge.

This is an important characteristic because it allows the drive to be used as part of a common DC power architecture.

Large DC-link capacitors can draw a very high initial current if they are connected directly to a high-energy DC source.

The precharge system controls the initial energization process.

This is particularly valuable in large multi-drive installations where several drives share a common DC bus.

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10. Common DC Bus Applications

The 20G14TC650JN0NNNNN is well suited to applications using a common DC bus.

A common-DC-bus system may contain several drive sections, each controlling a different motor.

For example, a large production line could contain:

• Main process motor
• Feed motor
• Conveyor motor
• Take-up motor
• Winder motor
• Process-roll motor
• Auxiliary motor

The DC bus can provide a shared electrical architecture for these drive sections.

In suitable systems, energy generated by one motor during deceleration can also be available to another motor operating in a motoring condition.

This can improve overall energy utilization compared with treating every drive as a completely independent system.

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11. JN Configuration

The JN configuration is an important feature of this catalog number.

For the 20G14TC650JN0NNNNN, the filtering and common-mode capacitor jumper configuration is:

Filtered, CM Jumper Installed

This differs from the corresponding AN configuration.

Model	Filter / CM Configuration
20G14TC650JN0NNNNN	Filtered, CM Jumper Installed
20G14TC650AN0NNNNN	Filter / CM Jumper Removed

The two models can therefore have very similar electrical ratings while differing in their EMC-related factory configuration.

When replacing one with the other, the filtering and grounding architecture should be reviewed rather than assuming the catalog numbers are completely interchangeable.

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12. Filtering and EMC

The JN version is configured with filtering and the CM jumper installed.

This is useful for applications where conducted electrical noise and electromagnetic compatibility are important considerations.

High-power variable-frequency drives use high-speed switching devices, which can produce electrical noise and common-mode effects.

The final EMC performance depends on the complete installation, including:

• Motor cable
• Cable length
• Grounding
• Cabinet construction
• Motor construction
• Filter configuration
• CM configuration
• Communication wiring
• Control wiring
• Installation topology

The factory configuration is therefore only one part of the overall EMC design.

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13. Dynamic Braking

The 20G14TC650JN0NNNNN is configured with no dynamic braking.

There is no internal dynamic-braking transistor and no internal braking resistor.

Braking Parameter	Specification
Dynamic Braking	None
Internal Braking Transistor	Not Included
Internal Braking Resistor	Not Included
External Braking	Application Dependent
Regenerative Solution	Application Dependent

For applications with large rotating inertia, braking must be considered during the system-design stage.

When a motor decelerates, mechanical energy can be returned to the electrical system.

Depending on the application, the system may require:

• External braking
• Regenerative equipment
• Mechanical braking
• Longer deceleration time
• Alternative drive configuration

This is particularly important for high-inertia conveyors, hoisting-related machinery, centrifuges, large drums, and other equipment where rapid stopping is required.

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14. Mechanical Specifications

The drive uses a Frame 8 Open Type construction.

Mechanical Parameter	Approximate Specification
Model	20G14TC650JN0NNNNN
Frame	8
Construction	Open Type
Height	2145 mm
Width	778 mm
Depth	421 mm
Overall Approx. Dimensions	2145 × 778 × 421 mm
Approx. Weight	162 kg
Cooling	Forced Air
Mounting	Industrial Cabinet / Enclosure

This is a large industrial drive.

The approximately 2.145 m height should be taken into account when designing the electrical room or cabinet.

The installation must provide sufficient room for:

• Power connections
• DC bus connections
• Motor cables
• Control wiring
• Ethernet cables
• Cooling airflow
• Maintenance
• Inspection
• Grounding
• Cable bending radius

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15. Weight and Handling

The approximate weight of the drive is 162 kg.

This is substantial enough that mechanical handling must be planned in advance.

The cabinet or mounting structure must be designed to support the drive and the additional weight of associated components.

The finished installation can be significantly heavier once the following equipment is added:

• Busbars
• Protective fuses
• Disconnect equipment
• DC bus components
• Control transformers
• PLC equipment
• Ethernet switches
• Terminal blocks
• Additional drives
• Cooling equipment
• Cable assemblies

Suitable industrial lifting and handling equipment should therefore be considered for installation.

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16. Cooling and Thermal Management

The 20G14TC650JN0NNNNN is an air-cooled drive using forced airflow.

At approximately 355 kW Normal Duty, thermal management becomes a major engineering consideration.

Even with high power-conversion efficiency, a large drive produces heat during operation.

The cabinet and electrical room should therefore be designed to manage:

• Heat generated by the drive
• Cooling-air circulation
• Exhaust-air routing
• Ambient temperature
• Fan operation
• Dust accumulation
• Filter condition
• Heat transfer between equipment

Poor ventilation can increase internal temperature and place additional thermal stress on power components and electronic assemblies.

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17. Environmental Specifications

Environmental Parameter	Typical Specification
Operating Temperature	Approximately 0–50 °C, configuration dependent
Storage Temperature	Approximately -40 to +70 °C
Relative Humidity	Approximately 5–95%, non-condensing
Cooling	Forced Air
Construction	Open Type
Installation Environment	Industrial
Cabinet / Room Protection	Required according to application

Environmental conditions should be evaluated carefully.

Important factors include:

• Dust
• Moisture
• Oil mist
• Corrosive gases
• Conductive contaminants
• Vibration
• Ambient temperature
• Heat generated by adjacent equipment

Because the drive is an open-type unit, the surrounding installation must provide suitable environmental protection.

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18. Embedded EtherNet/IP

The model includes embedded EtherNet/IP communication.

This allows the drive to become part of a modern industrial automation network.

Typical functions can include:

• Start and stop commands
• Speed reference
• Drive status
• Fault information
• Diagnostic information
• Parameter information
• Process data
• Monitoring

This can be particularly valuable in large production facilities containing multiple drives.

Instead of relying entirely on individual hardwired signals, the control system can exchange drive information through the industrial Ethernet network.

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19. No HIM Configuration

The catalog configuration specifies:

Blank / No HIM

The drive does not include a local human-interface module as part of this configuration.

This can be useful in large industrial installations where the main operator interface is located remotely.

The drive can be integrated with:

• HMI systems
• PLC systems
• SCADA
• Control-room equipment
• EtherNet/IP networks
• Remote maintenance systems

For a large machine, centralized control can be more practical than requiring operators to interact directly with every individual drive.

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20. Large Pump Applications

The 20G14TC650JN0NNNNN can be used for large pump systems when the motor and load fall within the drive’s ratings.

Potential applications include:

• Water treatment
• Industrial water circulation
• Cooling-water systems
• Process pumps
• Mining slurry systems
• Industrial wastewater
• Large circulation pumps
• Process industries

Variable-speed control allows pump speed to follow process requirements.

For appropriate centrifugal-pump systems, speed reduction can also provide substantial energy-saving potential compared with operating continuously at full speed and controlling flow mechanically.

Actual savings depend on the complete hydraulic system and operating profile.

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21. Large Fan Applications

Large fans can also be suitable applications.

Examples include:

• Furnace fans
• Kiln fans
• Mine ventilation
• Dust-collection fans
• Industrial exhaust
• Cooling systems
• Process ventilation
• Large air-handling systems

The 750 A Light Duty capability can be particularly relevant to suitable variable-torque applications.

The actual motor current and operating duty should still be checked before selecting the drive.

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22. Conveyor Applications

Heavy conveyor systems can place substantial demands on the drive during acceleration.

Large conveyors can carry:

• Ore
• Coal
• Aggregate
• Cement
• Steel
• Bulk materials
• Heavy manufactured products

A controlled acceleration profile can reduce mechanical shock and provide smoother machine operation.

For very large conveyor systems, several drives may be coordinated.

In such installations, the PowerFlex 755 communication and common-DC-bus capabilities can be valuable at the system level.

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23. Mining Applications

Mining operations frequently require high-power motor systems.

Potential applications include:

• Ore conveyors
• Crushers
• Large pumps
• Mine ventilation
• Material handling
• Processing equipment
• Feed systems
• Heavy rotating equipment

Mining environments can be particularly demanding because of dust, temperature, vibration, and contamination.

The drive should therefore be installed in an electrical environment designed for the specific application.

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24. Cement and Aggregate Applications

Cement and aggregate plants use high-power motors throughout the production process.

Typical applications include:

• Crushers
• Mills
• Conveyors
• Large fans
• Pumps
• Feeders
• Dust collection
• Material handling

The 20G14TC650JN0NNNNN can be used where the motor current and duty requirements fall within the drive ratings.

Its large Frame 8 configuration is particularly appropriate for centralized high-power electrical installations.

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25. Steel and Metal Processing

Steel-processing equipment often requires several large motors operating together.

Potential applications include:

• Rolling equipment
• Strip-processing machinery
• Process rolls
• Winding systems
• Large pumps
• Cooling equipment
• Conveyors
• Material handling

In these systems, coordinated motor control is often essential.

The PowerFlex 755 architecture can be used as part of a larger control system in which several drives exchange information with the main automation controller.

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26. Paper and Pulp Machinery

Paper and pulp equipment can require numerous coordinated motor sections.

Applications include:

• Process rolls
• Dryer sections
• Winding equipment
• Feed systems
• Large fans
• Pumps
• Material handling

Stable speed and torque control can be important to maintaining product quality.

The high current capacity of the 20G14TC650JN0NNNNN allows it to serve large motor sections where the required current is within the drive’s rating.

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27. Material Handling Applications

The drive can also be considered for large material-handling systems.

Typical applications include:

• Bulk-material conveyors
• Transfer systems
• Port machinery
• Industrial transportation
• Heavy production equipment
• Storage systems
• Large lifting-related machinery

EtherNet/IP communication allows the drive to exchange operating information with the machine controller and other automation equipment.

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28. Main Product Advantages

28.1 High Current Capacity

The 650 A Normal Duty rating is one of the most significant advantages of this drive.

It allows a single high-power drive to control large industrial motors that would be beyond the range of many compact VFDs.

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28.2 355 kW Normal Duty Capability

The approximately 355 kW Normal Duty rating places the drive firmly in the high-power industrial category.

It is suitable for major industrial machines rather than small machine-building applications.

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28.3 400 kW Light Duty Capability

The 750 A / 400 kW Light Duty rating provides additional flexibility for appropriate variable-torque applications.

This can be particularly useful for large pumps and fans when the actual load characteristics permit the Light Duty rating.

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28.4 315 kW Heavy Duty Capability

The 540 A / 315 kW Heavy Duty rating provides a clearly defined capacity for more demanding load profiles.

This makes the model useful for evaluating high-torque machinery without selecting the drive solely from a simple kW comparison.

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28.5 Common DC Bus Capability

The DC input with precharge configuration makes the model particularly suitable for common-DC-bus systems.

This is valuable in machines containing multiple coordinated drive sections.

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28.6 Embedded EtherNet/IP

Integrated EtherNet/IP simplifies connection to industrial automation systems.

It can reduce the amount of hardwired signaling required for drive commands, monitoring, and diagnostics.

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28.7 Filtered JN Configuration

The filtered configuration with the CM jumper installed provides a defined EMC-related configuration for system designers.

This is useful when electrical noise and common-mode behavior are important considerations.

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28.8 Modular Architecture

The PowerFlex 755 platform provides a modular architecture that can support different application requirements.

Depending on the overall configuration, the platform can accommodate different combinations of:

• I/O
• Feedback
• Communication
• Control
• Safety
• Application functions

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29. Advantages for System Integrators

For system integrators, the 20G14TC650JN0NNNNN provides a high-capacity drive platform for large industrial systems.

The 650 A Normal Duty rating provides enough capacity for very large motors.

The DC-input configuration provides additional flexibility when designing common-DC-bus systems.

Embedded EtherNet/IP also provides a convenient communication path between the drive and the larger automation system.

For installations containing multiple PowerFlex 755 drives, platform standardization can simplify:

• Programming
• Commissioning
• Troubleshooting
• Operator training
• Maintenance
• Spare-parts planning

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30. Advantages for OEM Machine Builders

For OEMs building large industrial machinery, the PowerFlex 755 platform provides a scalable approach to motor control.

Different machine sections can use different drive sizes while remaining within the same general product family.

This can simplify engineering and documentation.

The platform is particularly useful for:

• Large process machines
• Conveyors
• Pumps
• Fans
• Material-handling systems
• Multi-motor equipment
• High-power production machinery

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31. Advantages for Plant Operators

For plant operators, the drive provides a combination of high-power motor control and industrial communication.

Potential operational benefits include:

• Smooth acceleration
• Controlled deceleration
• Adjustable motor speed
• Improved process control
• Drive status monitoring
• Fault diagnostics
• Network-based monitoring
• Reduced mechanical shock
• Easier integration with plant automation

Actual performance depends on the machine design, motor selection, process conditions, and control strategy.

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32. Five Recommended Models from the Same TC Series

The following models are closely related 400 VAC common-DC-bus PowerFlex 755 configurations.

Model / Part Number	Voltage	Light Duty	Normal Duty	Heavy Duty	Frame	Input
20G14TC460JN0NNNNN	400 VAC	540 A / 315 kW	460 A / 250 kW	385 A / 200 kW	8	DC Input with Precharge
20G14TC540JN0NNNNN	400 VAC	585 A / 315 kW	540 A / 315 kW	456 A / 250 kW	8	DC Input with Precharge
20G14TC567JN0NNNNN	400 VAC	612 A / 355 kW	567 A / 315 kW	472 A / 250 kW	8	DC Input with Precharge
20G14TC650JN0NNNNN	400 VAC	750 A / 400 kW	650 A / 355 kW	540 A / 315 kW	8	DC Input with Precharge
20G14TC750JN0NNNNN	400 VAC	796 A / 450 kW	750 A / 400 kW	585 A / 315 kW	8	DC Input with Precharge

These models provide a useful progression of current and power capacity.

The 460 A model is appropriate when the required current is considerably below the 650 A level.

The 540 A and 567 A versions provide intermediate choices.

The 650 A model provides a substantial increase in capacity.

The 750 A model provides still more current capability for very large systems.

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33. Mechanical Comparison of Same-Series Models

Model / Part Number	Frame	Approx. Height	Approx. Width	Approx. Depth	Approx. Weight
20G14TC460JN0NNNNN	8	2145 mm	778 mm	421 mm	~162 kg
20G14TC540JN0NNNNN	8	2145 mm	778 mm	421 mm	~162 kg
20G14TC567JN0NNNNN	8	2145 mm	778 mm	421 mm	~162 kg
20G14TC650JN0NNNNN	8	2145 mm	778 mm	421 mm	~162 kg
20G14TC750JN0NNNNN	8	2145 mm	778 mm	421 mm	~162 kg

These dimensions are approximate drive-level values.

Although the electrical ratings increase significantly across the range, the listed configurations remain within the same general Frame 8 physical class.

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34. Five Related PowerFlex 755 Models

The following 690 VAC PowerFlex 755 models are useful related products when comparing higher-voltage industrial installations.

Model / Part Number	Voltage	Normal Duty Current	Normal Duty Power	Heavy Duty Current	Heavy Duty Power	Frame
20G14NF119JA0NNNNN	690 VAC	119 A	110 kW	98 A	90 kW	6
20G14NF142JA0NNNNN	690 VAC	142 A	132 kW	119 A	110 kW	6
20G14NF171JA0NNNNN	690 VAC	171 A	160 kW	142 A	132 kW	7
20G14NF212JA0NNNNN	690 VAC	212 A	200 kW	171 A	160 kW	7
20G14NF263JA0NNNNN	690 VAC	263 A	250 kW	212 A	200 kW	7

These are related PowerFlex 755 models rather than direct substitutes.

They are useful when a plant operates at 690 VAC and needs a PowerFlex 755 platform with a different voltage class.

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35. Mechanical Reference for Related Models

Model / Part Number	Frame	Approx. Dimensions	Approx. Weight
20G14NF119JA0NNNNN	6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF142JA0NNNNN	6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF171JA0NNNNN	7	Approx. 430.0 × 881.5 × 349.6 mm	Approx. 72.6–108.9 kg
20G14NF212JA0NNNNN	7	Approx. 430.0 × 881.5 × 349.6 mm	Approx. 72.6–108.9 kg
20G14NF263JA0NNNNN	7	Approx. 430.0 × 881.5 × 349.6 mm	Approx. 72.6–108.9 kg

The dimensions and weights are approximate reference values and can vary with configuration and installed options.

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36. Five Popular Allen-Bradley Models

The following five models provide a useful comparison with other popular Allen-Bradley drive products.

Model / Part Number	Series	Voltage Class	Current Class	Approx. Power Class	Typical Application
25B-D017N114	PowerFlex 525	480 VAC class	17 A	~7.5 kW class	Machine control
25B-D024N114	PowerFlex 525	480 VAC class	24 A	~11 kW class	Pumps / fans / conveyors
25B-D030N114	PowerFlex 525	480 VAC class	30 A	~15 kW class	Industrial machinery
20G11NC5P0JA0NNNNN	PowerFlex 755	480 VAC class	~50 A class	~37–45 kW class	Industrial motor control
20G11NC072JA0NNNNN	PowerFlex 755	480 VAC class	~72 A class	~55 kW class	Medium/high-power machinery

These products cover much smaller power ranges than the 20G14TC650JN0NNNNN.

The comparison illustrates the large difference between compact machine drives and Frame 8 high-power industrial drives.

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37. Mechanical Reference for Popular Models

Model / Part Number	General Size Class	Approx. Dimensions	Approx. Weight
25B-D017N114	Compact	Configuration dependent	Configuration dependent
25B-D024N114	Compact	Configuration dependent	Configuration dependent
25B-D030N114	Compact	Configuration dependent	Configuration dependent
20G11NC5P0JA0NNNNN	PowerFlex 755 medium frame	Configuration dependent	Configuration dependent
20G11NC072JA0NNNNN	PowerFlex 755 medium frame	Configuration dependent	Configuration dependent

For these smaller configurations, exact dimensions and weights can vary depending on frame size, enclosure, options, and installation arrangement.

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38. 650 A Model Compared with 567 A Model

The 20G14TC650JN0NNNNN provides more current and power capacity than the 567 A version.

Characteristic	567 A Model	650 A Model
Model	20G14TC567JN0NNNNN	20G14TC650JN0NNNNN
Light Duty	612 A	750 A
Normal Duty	567 A	650 A
Normal Duty Power	315 kW	355 kW
Heavy Duty	472 A	540 A
Frame	8	8
Input	DC Input with Precharge	DC Input with Precharge
Approx. Dimensions	2145 × 778 × 421 mm	2145 × 778 × 421 mm
Approx. Weight	~162 kg	~162 kg

The 650 A model therefore provides additional current margin and a higher Normal Duty power rating.

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39. 650 A Model Compared with 750 A Model

The next step in the same TC series is the 750 A model.

Characteristic	650 A Model	750 A Model
Model	20G14TC650JN0NNNNN	20G14TC750JN0NNNNN
Light Duty	750 A	796 A
Normal Duty	650 A	750 A
Normal Duty Power	355 kW	400 kW
Heavy Duty	540 A	585 A
Frame	8	8
Input	DC Input with Precharge	DC Input with Precharge
Approx. Dimensions	2145 × 778 × 421 mm	2145 × 778 × 421 mm
Approx. Weight	~162 kg	~162 kg

The 750 A model is appropriate when additional motor-current capacity is required.

However, selecting a larger drive simply because it has a higher current rating is not always the best approach.

Correct sizing should consider the actual motor current, duty cycle, overload requirements, ambient conditions, acceleration, deceleration, braking, and system architecture.

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40. Application Selection Guide

Application	Selection Consideration
Large centrifugal pump	Light Duty may be suitable
Large industrial fan	Light Duty may be suitable
Heavy conveyor	Normal / Heavy Duty evaluation
Crusher	Heavy Duty evaluation
Large mixer	Heavy Duty evaluation
Steel-processing equipment	Normal / Heavy Duty evaluation
Mining conveyor	Normal / Heavy Duty evaluation
Paper machinery	Normal Duty evaluation
Large process pump	Normal or Light Duty depending on load
High-inertia machine	Braking analysis required
Common DC bus	DC-input configuration is particularly suitable
Multi-drive system	Common DC bus and communication architecture should be evaluated

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41. Motor Selection Considerations

When selecting a motor for the 20G14TC650JN0NNNNN, engineers should not rely solely on the motor’s kW rating.

Important motor parameters include:

• Rated voltage
• Rated current
• Rated power
• Rated frequency
• Rated speed
• Power factor
• Efficiency
• Starting torque
• Continuous torque
• Peak torque
• Overload requirements
• Acceleration requirements
• Deceleration requirements
• Motor cable length
• Feedback requirements

Motor full-load current is particularly important.

A 355 kW motor does not necessarily have exactly the same current requirement as another 355 kW motor.

Motor voltage, efficiency, power factor, and construction can all affect current.

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42. High-Inertia Load Considerations

High-inertia loads deserve special attention.

When a large machine decelerates, its rotating mass can return energy to the drive’s DC bus.

Examples include:

• Large fans
• Large drums
• Centrifuges
• Heavy conveyors
• Roll systems
• Winding equipment

Because the requested configuration has no internal dynamic-braking transistor or resistor, the braking strategy should be established during system design.

Possible approaches include controlled deceleration, external braking, regenerative solutions, or mechanical braking.

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43. Installation Considerations

The 20G14TC650JN0NNNNN is a large Frame 8 drive.

The installation should therefore be designed around the actual dimensions and weight.

Installation Parameter	Reference
Drive Height	~2145 mm
Drive Width	~778 mm
Drive Depth	~421 mm
Drive Weight	~162 kg
Cooling	Forced Air
Construction	Open Type
Input	DC with Precharge
Frame	8
Cabinet Planning	Required
Maintenance Access	Required
Handling Equipment	Recommended

For Frame 8–10 drives, suitable handling equipment is particularly important during installation and power-wiring work.

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44. Cabinet Design

The cabinet should provide adequate space around the drive for:

• Cooling airflow
• Power wiring
• Control wiring
• Ethernet wiring
• Grounding
• Maintenance
• Inspection

High-current cables also require suitable bending radius and mechanical support.

The cabinet’s thermal design should account for heat produced by the drive and any other equipment installed in the same enclosure.

The cabinet should also prevent hot exhaust air from being recirculated into the drive’s cooling-air inlet.

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45. Maintenance Recommendations

Regular maintenance is particularly important for a high-power air-cooled drive.

Cooling Fan Inspection

Cooling fans should be inspected for abnormal noise, vibration, and airflow.

Airflow Inspection

Cooling paths should be kept clean.

Dust accumulation can reduce airflow and increase operating temperature.

Electrical Connection Inspection

High-current connections should be inspected according to the plant maintenance procedure.

Cabinet Inspection

The cabinet should be checked for:

• Excessive heat
• Dust
• Moisture
• Corrosion
• Blocked airflow
• Loose wiring
• Abnormal fan operation

Network Inspection

EtherNet/IP connections should be inspected if communication problems or intermittent drive faults occur.

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46. Spare-Parts Planning

For a critical production line, spare-parts planning can reduce downtime.

Potential spare-part categories include:

• Cooling fans
• Control components
• Interface boards
• Communication modules
• Feedback modules
• Power components
• Terminal assemblies
• Associated fuses
• Control equipment

For extremely critical processes, maintaining a complete spare drive or major drive assembly may be justified.

For less critical applications, component-level spare parts may provide an appropriate balance between availability and cost.

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47. Five Same-Series Model Selection Reference

For quick comparison, the following table summarizes the main 400 VAC common-DC-bus models discussed above.

Model / Part Number	LD Current	LD Power	ND Current	ND Power	HD Current	HD Power	Frame
20G14TC460JN0NNNNN	540 A	315 kW	460 A	250 kW	385 A	200 kW	8
20G14TC540JN0NNNNN	585 A	315 kW	540 A	315 kW	456 A	250 kW	8
20G14TC567JN0NNNNN	612 A	355 kW	567 A	315 kW	472 A	250 kW	8
20G14TC650JN0NNNNN	750 A	400 kW	650 A	355 kW	540 A	315 kW	8
20G14TC750JN0NNNNN	796 A	450 kW	750 A	400 kW	585 A	315 kW	8

This table makes the position of the 20G14TC650JN0NNNNN within the series particularly clear.

It is larger than the 460 A, 540 A, and 567 A configurations and sits immediately below the 750 A configuration.

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48. Practical Selection Logic

A simple selection process can be structured as follows.

First, confirm the electrical system voltage.

For this model, the target system is the 400 VAC three-phase class with the appropriate DC-input architecture.

Second, determine the motor full-load current.

Third, identify the actual application duty.

Fourth, determine whether the load should be evaluated under Light Duty, Normal Duty, or Heavy Duty.

Fifth, check acceleration and deceleration requirements.

Sixth, determine whether braking or regeneration is required.

Seventh, check cabinet dimensions and cooling.

Finally, verify communication, feedback, I/O, grounding, EMC, and safety requirements.

This approach is much more reliable than selecting a drive solely from the motor’s kW rating.

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49. Product Positioning

The 20G14TC650JN0NNNNN can be positioned as a high-power Frame 8 PowerFlex 755 drive for large 400 VAC industrial motor systems.

Its primary strengths are its high current capability and its suitability for common-DC-bus applications.

The combination of:

• 750 A Light Duty
• 650 A Normal Duty
• 540 A Heavy Duty
• 400 kW Light Duty
• 355 kW Normal Duty
• 315 kW Heavy Duty

gives engineers substantial flexibility when matching the drive to different machine load profiles.

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50. Final Product Specification Table

Category	Final Specification
Brand	Allen-Bradley
Product Family	PowerFlex 750-Series
Product Series	PowerFlex 755
Model	20G14TC650JN0NNNNN
Product Type	PowerFlex Air-Cooled 755 AC Drive
Voltage	400 VAC
Phase	3 Phase
Input Configuration	DC Input with Precharge
Nominal DC Input Class	540 VDC
Light Duty Current	750 A
Light Duty Power	400 kW
Normal Duty Current	650 A
Normal Duty Power	355 kW
Heavy Duty Current	540 A
Heavy Duty Power	315 kW
Frame	8
Construction	Open Type
Cooling	Forced Air
Dynamic Braking	None
Braking Transistor	None
Braking Resistor	None
Filtering	Filtered
CM Jumper	Installed
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Operating Temperature	Approximately 0–50 °C
Relative Humidity	Approximately 5–95%, non-condensing
Storage Temperature	Approximately -40 to +70 °C
Approx. Height	2145 mm
Approx. Width	778 mm
Approx. Depth	421 mm
Approx. Dimensions	2145 × 778 × 421 mm
Approx. Weight	162 kg
Installation	Industrial Cabinet / Electrical Room
Main Application	High-Power Industrial Motor Control
Common DC Bus	Suitable
Typical Motor Power Class	Up to approximately 355 kW ND

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51. Final Product Assessment

The Allen-Bradley 20G14TC650JN0NNNNN is a high-power industrial AC drive designed for large motor applications where conventional compact drives are not sufficient.

Its 650 A Normal Duty rating and approximately 355 kW Normal Duty power capability place it in the high-power section of the PowerFlex 755 range.

The drive also provides 750 A / 400 kW Light Duty and 540 A / 315 kW Heavy Duty ratings, giving engineers a useful range of operating-duty choices.

Its 400 VAC three-phase configuration makes it suitable for industrial electrical systems in this voltage class, while the DC input with precharge configuration makes it especially useful for common-DC-bus applications.

The common-DC-bus architecture is one of the model’s most useful characteristics for large multi-drive machinery.

It can be used in systems where several motors need to operate together and where a shared DC power architecture provides a practical way to organize the drive system.

The JN configuration is also important because the drive is supplied with filtering and the CM jumper installed. This makes it distinct from the corresponding AN configuration and can be relevant when designing or modifying the EMC and grounding arrangement of an industrial installation.

The integrated EtherNet/IP communication capability makes the drive well suited to modern automation systems.

Large industrial installations increasingly depend on communication between drives, PLCs, HMIs, supervisory systems, and maintenance equipment.

The ability to communicate drive commands, status information, fault information, and diagnostic data over an industrial Ethernet network can make a large system easier to operate and maintain.

The Frame 8 construction demonstrates the scale of this drive.

With approximate dimensions of 2145 × 778 × 421 mm and an approximate weight of 162 kg, the drive requires careful mechanical and thermal planning.

Cabinet structure, lifting arrangements, power cables, ventilation, service clearance, grounding, and maintenance access should all be considered before installation.

The absence of an internal dynamic-braking transistor and braking resistor should also be considered when selecting the drive for high-inertia applications.

For machinery that frequently decelerates large rotating masses, the braking strategy should be established before the final drive configuration is selected.

Overall, the 20G14TC650JN0NNNNN is particularly well suited to large pumps, fans, conveyors, mining equipment, cement machinery, steel-processing systems, paper machinery, material-handling equipment, process machinery, and common-DC-bus multi-drive systems.

Its strongest technical characteristics are its 650 A Normal Duty capacity, 355 kW Normal Duty power class, 400 VAC three-phase system compatibility, DC input with precharge, Frame 8 construction, forced-air cooling, embedded EtherNet/IP, and filtered JN configuration with CM jumper installed.

For a large industrial motor-control system requiring substantial current capacity and a PowerFlex 755 platform, the 20G14TC650JN0NNNNN represents a high-capacity solution with a broad range of possible industrial applications.