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Allen-Bradley 20G14TC750JN0NNNNN PowerFlex 755 AC Drive — Complete Technical Specifications, Product Introduction, Applications, Advantages and Related Model Selection Guide

1. Product Introduction

The Allen-Bradley 20G14TC750JN0NNNNN is a high-power PowerFlex 755 Air-Cooled AC Drive designed for large industrial motor-control systems.

It is a 400 VAC, three-phase, 750 A PowerFlex 755 drive with a DC input with precharge, forced-air cooling, open-type construction, Frame 8 mechanical architecture, embedded EtherNet/IP communication, and a factory-installed filtering and common-mode capacitor jumper configuration.

The drive is rated at approximately 450 kW for Light Duty, 400 kW for Normal Duty, and 315 kW for Heavy Duty.

This makes the 20G14TC750JN0NNNNN a particularly suitable choice for large motors and high-power machinery where controlled acceleration, controlled speed, process regulation, network integration, and reliable continuous operation are required.

The model is part of the PowerFlex 755 product series and belongs to the broader PowerFlex 750-Series platform.

Its large current capacity places it well above compact machine-level variable-frequency drives. It is intended primarily for large industrial installations such as mining equipment, large conveyors, pumping systems, industrial fans, cement machinery, steel-processing equipment, paper machinery, compressors, and other high-power rotating equipment.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Broader Platform	PowerFlex 750-Series
Product Type	Air-Cooled AC Drive
Catalog Number	20G14TC750JN0NNNNN
Input Configuration	DC Input with Precharge
AC System Class	400 VAC
Phase	Three Phase
Nominal DC Bus Class	540 VDC
Cooling	Forced Air
Frame Size	Frame 8
Enclosure	Open Type
Communication	Embedded EtherNet/IP
Dynamic Braking	None
HIM	Blank / No HIM
Filtering	Filtered
CM Jumper	Installed
Normal Duty Rating	750 A / 400 kW
Light Duty Rating	796 A / 450 kW
Heavy Duty Rating	585 A / 315 kW

The PowerFlex 755 series is designed for industrial applications that require more flexibility and control capability than a basic general-purpose inverter.

It is especially appropriate where the drive is expected to become part of a larger automation architecture rather than simply provide local motor speed adjustment.

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3. Complete Technical Parameter Table

Parameter	Specification
Model / Part Number	20G14TC750JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	Air-Cooled AC Drive
Drive Configuration	Common DC Bus
Input Type	DC Input with Precharge
Nominal DC Input Class	540 VDC
AC System Voltage Class	400 VAC
Input Phase	Three Phase
Light Duty Continuous Current	796 A
Light Duty Power	450 kW
Normal Duty Continuous Current	750 A
Normal Duty Power	400 kW
Heavy Duty Continuous Current	585 A
Heavy Duty Power	315 kW
Frame Size	Frame 8
Cooling Method	Forced Air / Air Cooled
Enclosure Type	Open Type
Protection Configuration	Standard Protection
Filter	Installed
CM Jumper	Installed
Dynamic Braking	None
Internal Braking Resistor	None
Human Interface Module	Blank / No HIM
Communication	Embedded EtherNet/IP
Typical Operating Temperature	Approximately 0–50 °C
Relative Humidity	Approximately 5–95%, non-condensing
Storage Temperature	Approximately -40 to +70 °C
Approximate Height	2145 mm
Approximate Width	778 mm
Approximate Depth	421 mm
Approximate Dimensions	2145 × 778 × 421 mm
Approximate Weight	162 kg
Installation	Vertical industrial installation
Typical Application Class	Large Industrial Motor Control
Typical Motor Range	Up to approximately 400 kW Normal Duty
Main Application Types	Pumps, fans, conveyors, compressors, mining, cement, steel, paper, material handling

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4. Electrical Rating

The 20G14TC750JN0NNNNN is a high-current drive designed for large industrial motors.

Its principal rating is 750 A Normal Duty.

Under the Light Duty rating, the drive can provide 796 A continuous current and approximately 450 kW of power.

Under Normal Duty, it provides 750 A continuous current and approximately 400 kW.

Under Heavy Duty conditions, the continuous current rating becomes 585 A, corresponding to approximately 315 kW.

These three ratings are important because motor applications do not all have the same torque and overload requirements.

A centrifugal fan, for example, normally has a very different operating profile from a loaded conveyor or crusher.

The drive therefore should be selected according to the actual motor current and load duty rather than simply selecting a drive according to the motor’s nominal kW value.

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5. Light Duty Rating

The Light Duty rating is:

Light Duty Parameter	Value
Continuous Current	796 A
Approximate Power	450 kW
Frame	8
Cooling	Forced Air
Typical Load	Variable-torque / moderate-overload applications
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg

The Light Duty rating is especially useful for large variable-torque applications.

Large centrifugal pumps and fans are common examples because their torque requirements are generally related to speed rather than requiring extremely high starting torque.

In these applications, the 450 kW Light Duty capability can provide a large amount of motor capacity while maintaining variable-speed control.

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6. Normal Duty Rating

The Normal Duty rating is:

Normal Duty Parameter	Value
Continuous Current	750 A
Approximate Power	400 kW
Frame	8
Cooling	Forced Air
Typical Load	General industrial continuous-duty applications
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg

The 750 A / 400 kW Normal Duty rating is the most important reference point when the drive is being considered for a typical high-power industrial motor.

It is appropriate for applications where the load is substantial but does not require the additional overload characteristics associated with a Heavy Duty classification.

Large conveyors, industrial pumps, fans, compressors, material-handling systems, and process machinery can fall into this category depending on the actual motor current and load profile.

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7. Heavy Duty Rating

The Heavy Duty rating is:

Heavy Duty Parameter	Value
Continuous Current	585 A
Approximate Power	315 kW
Frame	8
Cooling	Forced Air
Typical Load	High-torque / high-overload applications
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg

Heavy Duty operation is relevant when the machine demands higher torque during starting, acceleration, or changing load conditions.

Examples can include:

• Crushers
• Mills
• Loaded conveyors
• Mixers
• Heavy material-handling equipment
• High-inertia machinery
• Certain process machines

The Heavy Duty rating should always be checked against the actual motor nameplate current and application duty cycle.

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8. 400 VAC Three-Phase Operation

The 20G14TC750JN0NNNNN belongs to the 400 VAC-class group of PowerFlex 755 common-DC-bus drives.

Three-phase operation makes it suitable for large industrial motors used throughout manufacturing, processing, utilities, infrastructure, mining, and material-handling installations.

At this power level, electrical-system design becomes particularly important.

The drive installation should be evaluated together with:

• Incoming electrical distribution
• DC bus architecture
• Motor voltage
• Motor full-load current
• Grounding
• Cable sizing
• Protection equipment
• Cabinet design
• Cooling
• EMC requirements
• Harmonic considerations
• Maintenance access

The drive should therefore be regarded as one component of a complete high-power motor-control system.

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9. DC Input with Precharge

The 20G14TC750JN0NNNNN is configured for DC input with precharge.

This is particularly significant for common DC bus systems.

Instead of treating each drive as a completely independent AC-to-DC-to-AC conversion system, multiple drive sections can be integrated into a common DC-bus architecture.

This can be advantageous in systems containing several coordinated motors.

In certain machine configurations, energy generated by one motor during deceleration can be available to other drives through the shared DC bus.

This can improve the overall energy architecture of a multi-drive system.

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10. Common DC Bus Applications

The common DC bus architecture makes the drive particularly attractive for large multi-drive machinery.

Typical applications include:

Application	Typical Reason for Common DC Bus
Large Conveyor System	Coordinated motor operation
Mining Machinery	Multiple high-power motors
Steel Machinery	Multi-motor process control
Paper Machinery	Coordinated drive sections
Material Handling	Energy sharing between drives
Large Production Lines	Centralized drive architecture
Regenerative Systems	Management of returned energy
Multi-Motor Machines	Coordinated speed and torque control

For a machine containing multiple large drives, common DC bus architecture can be a major system-level advantage.

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11. JN Configuration

The “J” configuration is an important part of the catalog number.

For the PowerFlex 750-Series common-bus drive selection structure, the character in the relevant catalog position determines the factory configuration of the filter and common-mode capacitor jumper.

The J configuration indicates that the filter/CM jumper arrangement is installed.

This is one of the main differences between the J and A versions of otherwise closely related catalog numbers.

For example:

Model	Filter / CM Jumper Configuration
20G14TC750JN0NNNNN	Installed
20G14TC750AN0NNNNN	Removed

Therefore, the two catalog numbers should not be considered identical simply because they have the same 750 A current rating.

The complete catalog number should always be checked during replacement.

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12. Relationship Between the J and A Versions

The JN and AN configurations are particularly important when maintaining an existing installation.

The corresponding AN configuration has been superseded by the JN configuration as the direct replacement arrangement.

The important practical point is that the electrical rating remains in the same general 750 A / 450 kW LD / 400 kW ND / 315 kW HD class, while the filter and CM-jumper configuration differs.

For replacement projects, the installation’s grounding, EMC, motor cable, and system architecture should be checked before changing between catalog configurations.

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13. Filtering and EMC

Large AC drives can influence the electromagnetic environment of an industrial facility.

The filter and common-mode configuration therefore matters.

The 20G14TC750JN0NNNNN is configured with the filter and CM jumper installed.

This configuration is useful for applications where the installation requires the corresponding factory EMC arrangement.

However, EMC performance is not determined by the drive alone.

The overall result also depends on:

• Motor cable construction
• Cable length
• Cable routing
• Shielding
• Grounding
• Cabinet construction
• Motor grounding
• Control-cable separation
• Nearby equipment
• Installation practices

A well-selected drive can still create unwanted interference if the overall installation is poorly designed.

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14. Dynamic Braking

The 20G14TC750JN0NNNNN is specified with no dynamic braking.

There is no internal dynamic-braking transistor or internal braking resistor specified for this catalog configuration.

This is an important point for applications involving rapid deceleration.

When a high-inertia motor decelerates, mechanical energy is returned to the drive’s electrical system.

That energy must be managed appropriately.

Depending on the machine, possible solutions can include:

• Controlled deceleration
• External braking equipment
• Regenerative systems
• Common DC bus energy sharing
• Mechanical braking
• Application-specific energy-management equipment

The correct approach depends heavily on the load inertia and stopping requirements.

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15. Mechanical Construction

The 20G14TC750JN0NNNNN uses a Frame 8 configuration.

This is a physically large industrial drive.

The approximate open-type dimensions are:

2145 mm × 778 mm × 421 mm

The approximate weight is:

162 kg

Mechanical Parameter	Specification
Frame	8
Enclosure	Open Type
Height	Approx. 2145 mm
Width	Approx. 778 mm
Depth	Approx. 421 mm
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg
Cooling	Forced Air
Mounting	Vertical
Installation Class	Large Industrial

These dimensions should be treated as drive-equipment dimensions rather than the complete finished cabinet dimensions.

The final cabinet will normally require additional space for power connections, cable routing, airflow, service access, and other equipment.

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16. Weight and Handling

At approximately 162 kg, the drive requires proper mechanical handling.

This should be considered during:

• Delivery
• Storage
• Transportation
• Cabinet assembly
• Installation
• Replacement
• Maintenance

For Frame 8 installations, appropriate handling equipment should be planned in advance.

The installation team should also verify that the cabinet structure, mounting system, and floor or support structure can safely handle the equipment.

The physical handling requirements are very different from those of small PowerFlex drives.

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17. Cooling System

The drive uses forced-air cooling.

High-power drives generate significant heat during operation.

The cabinet design therefore needs to provide sufficient airflow and thermal capacity.

Important considerations include:

• Ambient temperature
• Drive losses
• Airflow rate
• Air inlet temperature
• Exhaust temperature
• Cabinet size
• Filter condition
• Fan operation
• Installation altitude
• Nearby heat sources

Dust and contamination should also be controlled because blocked airflow can reduce cooling performance.

For continuously operating installations, cooling-fan inspection should form part of the preventive-maintenance program.

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18. Environmental Conditions

The drive is intended for industrial operating environments.

Typical reference conditions include an operating temperature of approximately 0 to 50 °C and relative humidity of approximately 5–95% non-condensing.

Storage temperature is approximately -40 to +70 °C.

Environmental Parameter	Specification
Operating Temperature	Approximately 0–50 °C
Relative Humidity	Approximately 5–95%, non-condensing
Storage Temperature	Approximately -40 to +70 °C
Cooling	Forced Air
Condensation	Not permitted during normal operation
Installation Environment	Industrial
Thermal Management	Required
Airflow	Required

Actual derating requirements can depend on the complete installation environment.

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19. Embedded EtherNet/IP

The 20G14TC750JN0NNNNN includes embedded EtherNet/IP.

This makes the drive suitable for integration into industrial automation networks.

Typical network functions can include:

• Start and stop commands
• Speed reference
• Frequency reference
• Drive status
• Fault information
• Alarm information
• Current monitoring
• Voltage monitoring
• Diagnostic information
• Parameter access
• Process data exchange

For a large industrial system, this can greatly simplify communication between the drive and a programmable control system.

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20. No HIM Configuration

The model is specified with a Blank / No HIM configuration.

This means the drive is not being supplied with a selected local Human Interface Module as part of the catalog configuration.

This arrangement is often useful when the machine is operated through a centralized control system.

The operator may instead use:

• HMI
• PLC
• SCADA
• Industrial Ethernet
• Remote control station
• Centralized machine-control software

A no-HIM arrangement can also be practical when the drive is installed inside a large electrical cabinet.

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21. Application — Large Pumping Systems

Large pumping systems are among the strongest applications for this drive.

Potential applications include:

• Water treatment
• Industrial water circulation
• Cooling-water systems
• Process-fluid circulation
• Mining dewatering
• Irrigation
• Utility pumping
• Industrial process pumping

Variable-speed control allows pump speed to be adjusted according to actual process demand.

This can reduce unnecessary operation at full speed and can improve process control.

For centrifugal pumps, the relationship between speed, flow, pressure, and power can make variable-speed operation particularly attractive.

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22. Application — Large Fans and Blowers

Large fans and blowers are another strong application area.

Examples include:

• Furnace fans
• Boiler fans
• Mine ventilation
• Industrial ventilation
• Exhaust systems
• Dust collection
• Cooling systems
• Process-air systems

The drive can regulate motor speed according to the required airflow.

This can be much more flexible than simply operating a large motor at constant speed.

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23. Application — Mining Equipment

Mining applications frequently require high-power motors.

Potential applications include:

• Mining conveyors
• Crushers
• Screens
• Pumps
• Ventilation fans
• Mills
• Material-handling systems
• Dewatering equipment

Mining machinery can also present difficult starting and acceleration conditions.

The correct duty classification should therefore be selected based on actual load torque and motor current.

Environmental considerations are also important, particularly dust, temperature, altitude, ventilation, and cabinet protection.

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24. Application — Cement and Aggregate

Cement and aggregate plants contain many large rotating machines.

The 20G14TC750JN0NNNNN can be considered for applications such as:

• Crushers
• Large conveyors
• Process fans
• Dust collectors
• Feeders
• Mills
• Pumps
• Material-handling systems

Controlled acceleration can help reduce mechanical shock to belts, couplings, gearboxes, bearings, and other mechanical components.

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25. Application — Steel and Metal Processing

Steel plants and metal-processing facilities often require large motors operating continuously under demanding conditions.

Potential applications include:

• Cooling-water pumps
• Process fans
• Material-handling systems
• Large conveyors
• Extraction systems
• Ventilation
• Process auxiliaries

The drive’s network capability also makes it suitable for integration into centralized plant-control systems.

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26. Application — Paper and Pulp Machinery

Paper-making machinery often uses multiple motors that must operate together.

Typical applications include:

• Process pumps
• Vacuum systems
• Fans
• Roll drives
• Stock-preparation equipment
• Material handling
• Process ventilation

The common DC bus architecture can be particularly useful when several drive sections are coordinated within the same machine.

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27. Application — Material Handling

Large material-handling systems can benefit from variable-speed control.

Applications include:

• Bulk material conveyors
• Port conveyors
• Mining conveyors
• Aggregate conveyors
• Production-line conveyors
• Large warehouse equipment
• Transfer systems

Controlled acceleration can reduce mechanical shock.

Controlled deceleration can also reduce sudden stress on the conveyor and transmission system.

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28. Application — Compressors

Large compressors can require substantial motor power.

The drive can provide controlled motor acceleration and variable-speed operation where the compressor technology and process requirements permit it.

Potential benefits include:

• Controlled starting
• Adjustable operating speed
• Process control
• Reduced mechanical shock
• Centralized monitoring
• Network integration

The exact suitability depends on compressor type, motor current, torque characteristics, and operating profile.

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29. Main Product Advantages

29.1 Very High Current Capacity

The most obvious advantage is the 750 A Normal Duty rating.

This provides the capacity needed for very large industrial motors.

The drive is capable of approximately:

• 796 A Light Duty
• 750 A Normal Duty
• 585 A Heavy Duty

This gives engineers several application-rating options within one drive platform.

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29.2 High Power Capability

The drive reaches approximately:

450 kW Light Duty

400 kW Normal Duty

315 kW Heavy Duty

This places it firmly within the large industrial drive category.

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29.3 Common DC Bus Architecture

The DC-input configuration makes the drive suitable for common DC bus systems.

This can be particularly valuable when several drives operate together.

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29.4 Embedded EtherNet/IP

Embedded EtherNet/IP allows the drive to communicate with modern automation systems without requiring the same level of additional communication hardware that might otherwise be needed.

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29.5 Flexible Duty Ratings

The availability of Light Duty, Normal Duty, and Heavy Duty ratings makes the platform adaptable to different mechanical loads.

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29.6 Large Industrial Application Capability

The drive is suitable for many demanding applications, including:

• Mining
• Cement
• Steel
• Paper
• Water treatment
• Material handling
• Large pumps
• Large fans
• Process machinery

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29.7 Filter and CM Jumper Installed

The J configuration includes the corresponding filter and CM jumper arrangement installed.

This can simplify configuration when the application requires this arrangement.

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29.8 No Internal Braking Hardware

Although the lack of internal dynamic braking is not an advantage for every application, it can be appropriate for systems where braking is handled externally or through a regenerative/common-bus architecture.

This avoids forcing a braking configuration onto an application that does not require it.

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30. Advantages for System Integrators

For system integrators, the PowerFlex 755 platform provides a scalable architecture.

A plant can use multiple current ratings from the same general drive family while maintaining a consistent control philosophy.

This can simplify:

• Electrical design
• Control-system integration
• Network architecture
• Programming
• Commissioning
• Troubleshooting
• Maintenance training
• Spare-parts management

For large projects, standardization can be a significant practical benefit.

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31. Advantages for OEM Machine Builders

Machine builders can use the PowerFlex 755 platform as a standardized high-power drive architecture.

This can make it easier to develop machines in several capacity ranges.

For example, the same general software and control philosophy can be applied to a machine using a 460 A-class drive and another machine requiring approximately 750 A.

This can reduce engineering duplication.

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32. Advantages for Plant Maintenance

For maintenance personnel, centralized network communication can provide better visibility of drive status.

Useful information may include:

• Drive faults
• Drive alarms
• Motor current
• Operating status
• Speed
• Frequency
• Diagnostic information
• Parameter values

This can reduce troubleshooting time when the drive is integrated correctly into the plant automation network.

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33. Advantages for Energy Management

Variable-speed operation can provide energy-saving opportunities in suitable applications.

This is particularly relevant to variable-torque loads such as:

• Pumps
• Fans
• Blowers

The drive allows the motor speed to follow actual process demand.

The potential energy savings depend on the application, operating hours, control strategy, motor efficiency, and process requirements.

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34. Five Recommended Same-Series Models

The following five models are closely related PowerFlex 755 common-DC-bus models in the same 400 VAC-class group.

Model / Part Number	Light Duty	Normal Duty	Heavy Duty	Frame	Dimensions	Weight
20G14TC460JN0NNNNN	540 A / 315 kW	460 A / 250 kW	385 A / 200 kW	8	Approx. 2145 × 778 × 421 mm	Approx. 162 kg
20G14TC540JN0NNNNN	585 A / 315 kW	540 A / 315 kW	456 A / 250 kW	8	Approx. 2145 × 778 × 421 mm	Approx. 162 kg
20G14TC567JN0NNNNN	612 A / 355 kW	567 A / 315 kW	472 A / 250 kW	8	Approx. 2145 × 778 × 421 mm	Approx. 162 kg
20G14TC650JN0NNNNN	750 A / 400 kW	650 A / 355 kW	540 A / 315 kW	8	Approx. 2145 × 778 × 421 mm	Approx. 162 kg
20G14TC770JN0NNNNN	832 A / 450 kW	770 A / 400 kW	642 A / 355 kW	8	Approx. 2145 × 778 × 421 mm	Approx. 162 kg

These models are especially useful when the motor current falls below or above the 750 A range.

The 20G14TC650JN0NNNNN is a logical lower-current alternative.

The 20G14TC770JN0NNNNN is a logical higher-current alternative.

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35. Detailed Same-Series Comparison

Model / Part Number	LD Current	ND Current	HD Current	LD Power	ND Power	HD Power	Frame	Dimensions	Weight
20G14TC460JN0NNNNN	540 A	460 A	385 A	315 kW	250 kW	200 kW	8	2145 × 778 × 421 mm	162 kg
20G14TC540JN0NNNNN	585 A	540 A	456 A	315 kW	315 kW	250 kW	8	2145 × 778 × 421 mm	162 kg
20G14TC567JN0NNNNN	612 A	567 A	472 A	355 kW	315 kW	250 kW	8	2145 × 778 × 421 mm	162 kg
20G14TC650JN0NNNNN	750 A	650 A	540 A	400 kW	355 kW	315 kW	8	2145 × 778 × 421 mm	162 kg
20G14TC750JN0NNNNN	796 A	750 A	585 A	450 kW	400 kW	315 kW	8	2145 × 778 × 421 mm	162 kg
20G14TC770JN0NNNNN	832 A	770 A	642 A	450 kW	400 kW	355 kW	8	2145 × 778 × 421 mm	162 kg

This comparison shows an important characteristic of the series: several current ratings share the same Frame 8 mechanical envelope.

Therefore, the selection decision is primarily driven by electrical current, motor power, duty rating, and application requirements rather than by a major difference in physical frame size.

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36. Five Related PowerFlex 755 Models for Other Voltage Applications

If the application requires a different voltage class, the following PowerFlex 755 models are useful related references.

Model / Part Number	Voltage	Normal Duty	Heavy Duty	Frame	Braking	Dimensions	Weight
20G14NF119JA0NNNNN	690 VAC	119 A / 110 kW	98 A / 90 kW	6	DB Transistor	Approx. 308 × 665.5 × 346.4 mm	38.6 kg
20G14NF142JA0NNNNN	690 VAC	142 A / 132 kW	119 A / 110 kW	6	DB Transistor	Approx. 308 × 665.5 × 346.4 mm	38.6 kg
20G14NF171JA0NNNNN	690 VAC	171 A / 160 kW	142 A / 132 kW	7	DB Transistor	Approx. 430 × 881.5 × 349.6 mm	Approx. 72.6–108.9 kg
20G14NF212JA0NNNNN	690 VAC	212 A / 200 kW	171 A / 160 kW	7	DB Transistor	Approx. 430 × 881.5 × 349.6 mm	Approx. 72.6–108.9 kg
20G14NF263JA0NNNNN	690 VAC	263 A / 250 kW	212 A / 200 kW	7	DB Transistor	Approx. 430 × 881.5 × 349.6 mm	Approx. 72.6–108.9 kg

These are related PowerFlex 755 models rather than direct electrical substitutes.

Their voltage class and current capacity are substantially different from the 20G14TC750JN0NNNNN.

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37. Five Popular Allen-Bradley Models

The following models represent popular products from the same brand across different power levels.

Model / Part Number	Series	Voltage Class	Current Class	Approx. Power Class	Dimensions	Weight
25B-D017N114	PowerFlex 525	480 VAC Class	17 A	Approx. 7.5 kW Class	Configuration dependent	Configuration dependent
25B-D024N114	PowerFlex 525	480 VAC Class	24 A	Approx. 11 kW Class	Configuration dependent	Configuration dependent
25B-D030N114	PowerFlex 525	480 VAC Class	30 A	Approx. 15 kW Class	Configuration dependent	Configuration dependent
20G11NC5P0JA0NNNNN	PowerFlex 755	480 VAC Class	50 A Class	Approx. 37–45 kW Class	Configuration dependent	Configuration dependent
20G11NC072JA0NNNNN	PowerFlex 755	480 VAC Class	72 A Class	Approx. 55 kW Class	Configuration dependent	Configuration dependent

For the smaller models, the exact physical dimensions and shipping weight can vary according to frame, enclosure, options, and configuration.

Therefore, it is better to treat those values as configuration-dependent instead of using an incorrect fixed figure.

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38. Selection Comparison: 650 A vs 750 A vs 770 A

Parameter	20G14TC650JN0NNNNN	20G14TC750JN0NNNNN	20G14TC770JN0NNNNN
Light Duty Current	750 A	796 A	832 A
Normal Duty Current	650 A	750 A	770 A
Heavy Duty Current	540 A	585 A	642 A
Light Duty Power	400 kW	450 kW	450 kW
Normal Duty Power	355 kW	400 kW	400 kW
Heavy Duty Power	315 kW	315 kW	355 kW
Frame	8	8	8
Dimensions	Approx. 2145 × 778 × 421 mm	Approx. 2145 × 778 × 421 mm	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg	Approx. 162 kg	Approx. 162 kg

This is one of the most useful comparisons for selecting a drive around the 750 A range.

The 650 A model is appropriate when the motor current is comfortably below 750 A.

The 750 A model is the natural choice when the Normal Duty requirement approaches 750 A.

The 770 A model provides a modest increase in Normal Duty current and a more substantial increase in Heavy Duty capability.

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39. Motor Selection

For a large drive such as the 20G14TC750JN0NNNNN, motor selection should begin with the motor nameplate.

Important values include:

• Motor voltage
• Motor full-load current
• Motor frequency
• Motor power
• Motor speed
• Motor service factor
• Motor efficiency
• Motor power factor
• Starting torque
• Load torque
• Duty cycle

The motor’s full-load current is particularly important.

A 400 kW motor does not automatically have exactly the same current requirement as another 400 kW motor.

Different motor designs can have different efficiency and power-factor characteristics.

Therefore, the drive should be selected from the motor current and application duty rather than relying only on the kW value.

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40. High-Inertia Applications

High-inertia machinery deserves special attention.

Examples include:

• Large fans
• Large blowers
• Mills
• Centrifuges
• Flywheel systems
• Large rollers
• Certain conveyors

During acceleration, the drive needs sufficient torque to bring the machine to speed.

During deceleration, stored mechanical energy can return to the drive.

Because this model does not contain internal dynamic braking hardware, the braking strategy should be designed separately when rapid stopping is required.

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41. Cabinet Design

A Frame 8 drive of this size requires a properly engineered electrical cabinet.

The cabinet should consider:

• Drive dimensions
• Drive weight
• Power-cable routing
• Control wiring
• Communication wiring
• Ventilation
• Heat dissipation
• Maintenance clearance
• Grounding
• EMC
• Cable bending radius

The drive dimensions of approximately 2145 × 778 × 421 mm should not be treated as the total cabinet dimensions.

The finished installation will generally require additional space.

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42. Maintenance

Preventive maintenance is especially important for large industrial drives.

Maintenance personnel should periodically inspect:

• Cooling fans
• Air passages
• Filters
• Power connections
• Grounding
• Control wiring
• Network connections
• Signs of overheating
• Dust accumulation
• Fault history
• Unusual noise
• Unusual vibration

Cooling-system maintenance is particularly important.

A large drive operating continuously in a dusty industrial environment can experience reduced cooling performance if airflow paths become restricted.

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43. Spare-Drive Strategy

For a critical production process, the cost of unexpected downtime can exceed the cost of maintaining an appropriate spare strategy.

For this reason, plants using high-power drives should consider:

• Critical replacement drives
• Control components
• Communication components
• Cooling components
• Protection components
• Appropriate installation accessories

The exact spare-parts strategy should be based on the criticality of the production line.

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44. Product Selection by Application

Application	Recommended Duty Consideration	Main Selection Point
Large Centrifugal Pump	LD / ND	Motor current and variable-torque profile
Large Fan	LD / ND	Continuous current and airflow requirement
Conveyor	ND / HD	Starting torque and inertia
Crusher	HD	High torque and overload
Mill	HD	High inertia and regeneration
Mining Pump	ND / LD	Continuous operation
Mining Conveyor	ND / HD	Loaded starting conditions
Cement Fan	LD / ND	Continuous variable-speed operation
Cement Conveyor	ND / HD	Mechanical loading
Steel Process Equipment	ND / HD	Torque and speed regulation
Paper Machinery	ND	Multi-drive coordination
Large Compressor	ND / HD	Compressor load characteristics
Material Handling	ND / HD	Acceleration and deceleration

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45. Practical Model Selection Guide

When selecting between the closely related TC-series models, the following approach is useful.

Select 20G14TC460JN0NNNNN

Consider this model when the application requires approximately:

• Up to 460 A Normal Duty
• Up to 250 kW Normal Duty
• Approximately 200 kW Heavy Duty

Select 20G14TC540JN0NNNNN

Consider this model when the application requires approximately:

• Up to 540 A Normal Duty
• Up to 315 kW Normal Duty
• Up to 250 kW Heavy Duty

Select 20G14TC567JN0NNNNN

Consider this model when the application requires approximately:

• Up to 567 A Normal Duty
• Up to 315 kW Normal Duty
• Up to 250 kW Heavy Duty

Select 20G14TC650JN0NNNNN

Consider this model when the application requires approximately:

• Up to 650 A Normal Duty
• Up to 355 kW Normal Duty
• Up to 315 kW Heavy Duty

Select 20G14TC750JN0NNNNN

Consider this model when the application requires approximately:

• Up to 750 A Normal Duty
• Up to 400 kW Normal Duty
• Up to 315 kW Heavy Duty

Select 20G14TC770JN0NNNNN

Consider this model when the application requires approximately:

• Up to 770 A Normal Duty
• Up to 400 kW Normal Duty
• Up to 355 kW Heavy Duty

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46. Why the 20G14TC750JN0NNNNN Is a Strong High-Power Choice

The 20G14TC750JN0NNNNN occupies an important position within the Frame 8 common-DC-bus range.

It is not the smallest Frame 8 model, but it is also not the highest-capacity option.

That makes it a practical middle-to-upper-range selection for large industrial systems.

Its 750 A Normal Duty rating provides substantial capacity without moving into the next larger multi-drive arrangement.

The model is particularly attractive when the application requires approximately 400 kW Normal Duty capability.

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47. Important Advantages of the JN Version

The JN version provides a factory-installed filter and CM jumper arrangement.

This can be an important consideration when designing or replacing equipment.

Compared with an A-configured unit, the JN configuration is intended for the corresponding installed filter/CM-jumper arrangement.

Therefore, when replacing an existing drive, the complete catalog number should be checked rather than comparing only the current rating.

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48. Product Positioning

The 20G14TC750JN0NNNNN can be positioned as a:

High-Power 400 VAC Common DC Bus Industrial AC Drive

Its strongest application areas include:

• Large pumping
• Large ventilation
• Mining
• Cement
• Steel
• Paper
• Material handling
• Large conveyors
• Process machinery
• Industrial utilities

It is particularly well suited to installations where large motors operate continuously and need variable-speed control.

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49. Final Technical Summary

Category	Specification
Model / Part Number	20G14TC750JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	Air-Cooled AC Drive
Input Type	DC Input with Precharge
Nominal DC Bus	540 VDC
AC Voltage Class	400 VAC
Phase	Three Phase
Light Duty	796 A / 450 kW
Normal Duty	750 A / 400 kW
Heavy Duty	585 A / 315 kW
Frame	8
Cooling	Forced Air
Enclosure	Open Type
Filter	Installed
CM Jumper	Installed
Dynamic Braking	None
Internal Braking Resistor	None
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Operating Temperature	Approx. 0–50 °C
Relative Humidity	Approx. 5–95%, non-condensing
Storage Temperature	Approx. -40 to +70 °C
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg
Main Applications	Pumps, fans, conveyors, mining, cement, steel, paper, compressors, material handling
Installation Class	Large Industrial
Common DC Bus	Yes

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50. Final Product Assessment

The Allen-Bradley 20G14TC750JN0NNNNN PowerFlex 755 AC Drive is a high-capacity industrial drive designed for large three-phase motor applications.

Its 750 A Normal Duty rating, 796 A Light Duty rating, and 585 A Heavy Duty rating provide a broad range of application possibilities.

The approximately 400 kW Normal Duty power capability makes it particularly suitable for large industrial machines where a smaller variable-frequency drive would not provide sufficient current capacity.

The drive’s 540 VDC common-bus architecture, DC input with precharge, embedded EtherNet/IP, forced-air cooling, Frame 8 construction, and filter/CM jumper installed configuration make it suitable for sophisticated industrial drive systems.

The approximate 2145 × 778 × 421 mm dimensions and 162 kg weight should be taken into account during cabinet design, transportation, installation, and maintenance.

For pumping and fan applications, the Light Duty rating can provide approximately 450 kW of capacity.

For general industrial applications, the Normal Duty rating provides approximately 400 kW.

For high-torque applications, the Heavy Duty rating provides approximately 315 kW.

When selecting a related model, the 20G14TC650JN0NNNNN is a sensible lower-current alternative, while the 20G14TC770JN0NNNNN provides additional current and Heavy Duty capacity.

The most important engineering checks before selecting or replacing this drive are motor voltage, motor full-load current, load torque, duty cycle, acceleration requirements, deceleration requirements, regeneration, ambient temperature, cabinet cooling, EMC requirements, grounding, and the exact catalog-number configuration.

Overall, the 20G14TC750JN0NNNNN is best described as a large Frame 8 PowerFlex 755 common-DC-bus AC drive for 400 VAC three-phase industrial systems, with 750 A Normal Duty capacity and approximately 400 kW Normal Duty power capability.

It is particularly well suited to large industrial motors used in continuous-process, infrastructure, material-handling, mining, cement, steel, paper, pumping, ventilation, and other heavy industrial applications.