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Allen-Bradley 20G14TC770AN0NNNNN PowerFlex 755 AC Drive — Complete Technical Specifications, Applications, Advantages, and Related Model Guide

1. Product Overview

The Allen-Bradley 20G14TC770AN0NNNNN is a high-power PowerFlex 755 Air-Cooled AC Drive designed for large industrial motor-control applications.

It is a 400 VAC, three-phase, common-DC-bus drive with a DC input with precharge, forced-air cooling, open-type construction, Frame 8 architecture, embedded EtherNet/IP capability, and an EMC-filter configuration associated with the AN catalog arrangement.

The drive provides a substantial current range depending on the selected duty classification. Its ratings are approximately 832 A Light Duty, 770 A Normal Duty, and 642 A Heavy Duty.

The corresponding power ratings are approximately 450 kW Light Duty, 400 kW Normal Duty, and 355 kW Heavy Duty.

This makes the 20G14TC770AN0NNNNN one of the higher-capacity configurations within the 400 VAC-class Frame 8 PowerFlex 755 common-DC-bus range.

It is intended for large motors and demanding industrial machinery where a compact general-purpose variable-frequency drive would not provide sufficient current capacity.

Typical applications include large pumps, fans, blowers, conveyors, crushers, mills, mining machinery, cement-processing equipment, steel-processing systems, paper machinery, compressors, and large material-handling systems.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Platform	PowerFlex 750-Series
Product Type	Air-Cooled AC Drive
Catalog Number	20G14TC770AN0NNNNN
Drive Architecture	Common DC Bus
Input Configuration	DC Input with Precharge
AC Voltage Class	400 VAC
Phase	Three Phase
Nominal DC Bus Class	540 VDC
Cooling	Forced Air
Frame	Frame 8
Enclosure	Open Type
Communication	Embedded EtherNet/IP
Light Duty	832 A / 450 kW
Normal Duty	770 A / 400 kW
Heavy Duty	642 A / 355 kW
Dynamic Braking	None
HIM	Blank / No HIM
Filter Configuration	EMC Filter
CM Jumper Configuration	AN configuration / jumper arrangement according to catalog configuration

The PowerFlex 755 series is intended for industrial applications that require more than basic motor speed control.

It combines high-power motor control with network integration, flexible duty ratings, common-DC-bus capability, feedback options, diagnostics, and a scalable architecture suitable for large machinery.

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3. Complete Technical Parameter Table

Parameter	Specification
Model / Part Number	20G14TC770AN0NNNNN
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 Current	832 A
Light Duty Power	450 kW
Normal Duty Current	770 A
Normal Duty Power	400 kW
Heavy Duty Current	642 A
Heavy Duty Power	355 kW
Frame Size	Frame 8
Enclosure Type	Open Type
Cooling	Forced Air / Air Cooled
Filtering	EMC Filter
CM Configuration	AN configuration
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 Orientation	Vertical
Application Class	Large Industrial
Main Application Types	Pumps, fans, conveyors, mining, cement, steel, paper, compressors
Common DC Bus	Yes
Current Replacement Configuration	JN version is the corresponding replacement configuration

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4. Electrical Rating

The 20G14TC770AN0NNNNN is designed for very large industrial motors.

Its most significant rating is the 770 A Normal Duty continuous current capability.

For Light Duty applications, the drive provides approximately 832 A and 450 kW.

For Normal Duty applications, the rating is approximately 770 A and 400 kW.

For Heavy Duty applications, the rating is approximately 642 A and 355 kW.

This range makes the drive useful for applications with significantly different torque characteristics.

A large centrifugal fan may use the Light Duty rating efficiently, while a general industrial conveyor may fall under Normal Duty.

A high-torque conveyor, crusher, or mill may require the Heavy Duty rating.

The correct rating should always be selected using the actual motor current and application load profile.

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5. Light Duty Rating

The Light Duty rating is approximately 832 A / 450 kW.

This rating is particularly useful for variable-torque applications.

Large centrifugal fans and pumps are common examples.

Light Duty Parameter	Specification
Continuous Output Current	832 A
Approximate Power	450 kW
Frame	8
Cooling	Forced Air
Enclosure	Open Type
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg
Typical Loads	Large pumps, fans, blowers

The Light Duty rating provides the highest continuous current available from this particular catalog configuration.

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6. Normal Duty Rating

The Normal Duty rating is approximately 770 A / 400 kW.

This is the most important rating for many general industrial applications.

A large conveyor, pump, fan, compressor, or process machine may use this rating when its motor current and overload requirements fit within the Normal Duty specification.

Normal Duty Parameter	Specification
Continuous Output Current	770 A
Approximate Power	400 kW
Frame	8
Cooling	Forced Air
Enclosure	Open Type
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg
Typical Loads	Conveyors, pumps, fans, compressors, process machinery

A 770 A Normal Duty rating gives this model a useful amount of capacity for large industrial motors.

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7. Heavy Duty Rating

The Heavy Duty rating is approximately 642 A / 355 kW.

This rating is intended for applications where the mechanical load is more demanding.

Heavy Duty applications may involve:

• High starting torque
• Repeated acceleration
• High inertia
• Rapid load changes
• Heavy mechanical loading
• High torque at low speed

Heavy Duty Parameter	Specification
Continuous Output Current	642 A
Approximate Power	355 kW
Frame	8
Cooling	Forced Air
Enclosure	Open Type
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg
Typical Loads	Crushers, mills, loaded conveyors, heavy machinery

The Heavy Duty rating should be compared directly against the motor nameplate current and the machine’s actual torque requirements.

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8. 400 VAC Three-Phase System

The 20G14TC770AN0NNNNN belongs to the 400 VAC-class PowerFlex 755 family.

Three-phase operation is intended for large industrial motors and high-power rotating machinery.

At this size, electrical-system engineering becomes just as important as the drive itself.

The installation should be designed around:

• Motor voltage
• Motor current
• Incoming electrical supply
• DC bus arrangement
• Grounding
• Motor cables
• Protection equipment
• Cabinet construction
• Ventilation
• EMC
• Harmonics
• Maintenance access

A high-power drive should never be selected solely from the motor’s kW rating.

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9. DC Input with Precharge

The model uses a DC input with precharge configuration.

This makes it suitable for common DC bus applications.

A common DC bus can be useful when several drive sections are operating within the same machine or production system.

For example, one motor may be accelerating while another motor is decelerating.

In a suitably engineered common-bus system, energy from one drive can potentially be shared with another drive.

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

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10. Common DC Bus Applications

The 20G14TC770AN0NNNNN is particularly useful when integrated into large common-DC-bus systems.

Typical applications include:

Application	Typical Benefit
Mining Conveyor	Multi-drive coordination
Steel Processing	Coordinated motor control
Paper Machine	Energy sharing and synchronization
Large Material Handling	Coordinated acceleration
Multi-Motor Production Line	Centralized DC bus
Large Conveyor Network	Common power architecture
Regenerative System	Energy management
Large Process Machine	Coordinated motor operation

This architecture becomes increasingly useful as the number of large motors in a machine increases.

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11. AN Configuration

The AN portion of the catalog number identifies a specific factory configuration.

For the relevant PowerFlex catalog structure, the filtering and common-mode capacitor arrangement is encoded in the catalog number.

The 20G14TC770AN0NNNNN is associated with the AN configuration, while the corresponding JN version uses the preferred installed filter and CM-jumper arrangement.

This difference is important during replacement.

Configuration	Filter / CM Arrangement
20G14TC770AN0NNNNN	AN configuration
20G14TC770JN0NNNNN	Filtered, CM jumper installed

The AN and JN models should therefore not be treated as completely identical just because their current and power ratings are similar.

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12. Replacement Consideration

The 20G14TC770AN0NNNNN is an older catalog configuration.

The corresponding replacement configuration is 20G14TC770JN0NNNNN.

For an existing installation, the replacement should be evaluated against:

• Motor voltage
• Motor current
• Duty rating
• EMC configuration
• Grounding system
• CM jumper arrangement
• Cabinet design
• Communication architecture
• Braking requirements
• Existing accessories

A replacement project should therefore compare the complete catalog numbers rather than only comparing the “770” current code.

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13. Filtering and EMC

The drive uses an EMC-filter configuration.

Filtering is important because large variable-frequency drives can generate electrical noise through both power and motor circuits.

The actual EMC performance of an installation depends on much more than the filter inside the drive.

Important factors include:

• Motor cable construction
• Cable length
• Cable shielding
• Grounding
• Motor-frame bonding
• Cabinet grounding
• Control-cable routing
• Communication-cable routing
• Separation between power and control wiring

Correct installation practices are therefore essential.

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14. Dynamic Braking

The 20G14TC770AN0NNNNN is specified with no internal dynamic braking.

There is no internal braking resistor.

There is also no internal dynamic-braking transistor specified for this configuration.

This is important when the machine requires rapid deceleration.

A large rotating machine can store a considerable amount of kinetic energy.

When the motor is commanded to slow down, that energy can return to the electrical system.

For applications requiring rapid stopping, the designer may need to consider:

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

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15. Mechanical Specifications

The 20G14TC770AN0NNNNN is a Frame 8 high-power drive.

The approximate open-type drive dimensions are:

2145 mm high × 778 mm wide × 421 mm deep

The approximate equipment 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

The finished electrical cabinet will normally be larger than the drive itself.

Additional space is required for power connections, wiring, ventilation, service access, and other equipment.

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16. Weight and Handling

The approximate 162 kg weight means that this drive requires proper handling equipment.

This should be considered before the drive reaches the installation site.

Planning should include:

• Delivery route
• Storage position
• Cabinet installation
• Lifting equipment
• Mounting hardware
• Floor loading
• Service access
• Replacement procedure

The physical handling requirements are considerably greater than those of compact PowerFlex drives.

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17. Cooling System

The drive uses forced-air cooling.

At a 400 kW-class power level, thermal management is an important part of the installation.

The cabinet must provide adequate airflow around the drive.

The cooling system should account for:

• Ambient temperature
• Internal cabinet temperature
• Drive heat losses
• Fan capacity
• Airflow direction
• Air filters
• Installation altitude
• Nearby heat sources
• Continuous operating load

A high-power drive can be correctly selected electrically but still experience thermal problems if the cabinet is not properly ventilated.

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18. Environmental Specifications

Typical environmental reference values for the drive include an operating temperature of approximately 0–50 °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	Avoid
Environment	Industrial
Thermal Management	Required
Ventilation	Required

Actual installation conditions and derating requirements should be checked for the complete system.

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19. Embedded EtherNet/IP

The PowerFlex 755 platform provides embedded EtherNet/IP capability.

This is useful when the drive is connected to a plant automation system.

Typical data exchanged with a controller can include:

• Start command
• Stop command
• Speed reference
• Frequency reference
• Drive status
• Fault status
• Alarm information
• Output current
• Output voltage
• Speed
• Diagnostic information
• Parameter information

For large plants, network integration can significantly improve visibility of motor and drive operating conditions.

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20. No HIM Configuration

The catalog configuration specifies Blank / No HIM.

This means a dedicated local Human Interface Module is not included as part of the selected configuration.

This can be suitable for installations where the drive is controlled from:

• PLC
• HMI
• SCADA
• Central control system
• Industrial Ethernet
• Remote operator station

For a large electrical cabinet, local keypad operation may not be necessary.

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21. Large Pump Applications

Large pumping systems are one of the most suitable application areas for this drive.

Potential applications include:

• Water treatment
• Cooling-water circulation
• Industrial process water
• Mining dewatering
• Irrigation
• Utility pumping
• Chemical process pumping
• Large cooling systems

Variable-speed control allows the pump to operate according to process demand.

This can be particularly useful for centrifugal pumps.

Instead of continuously operating at full speed and controlling flow through mechanical throttling, the drive can adjust motor speed.

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22. Large Fan Applications

Large fans and blowers are also strong candidates.

Applications include:

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

The drive allows the fan motor speed to follow the required airflow.

This can improve process flexibility and may provide energy savings where the fan operates at reduced speed for substantial periods.

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23. Conveyor Applications

Large conveyors often require substantial motor current.

The 20G14TC770AN0NNNNN can be considered for applications such as:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Port conveyors
• Bulk material systems
• Industrial transfer systems

Controlled acceleration can reduce mechanical shock.

This can reduce stress on:

• Conveyor belts
• Gearboxes
• Couplings
• Bearings
• Shafts
• Drive pulleys

For heavily loaded conveyors, the Heavy Duty rating should be checked carefully.

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24. Mining Applications

Mining equipment often contains very large motors.

Potential applications include:

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

Mining machinery can produce demanding load profiles.

Starting torque, inertia, ambient temperature, dust, altitude, and cooling conditions should therefore be considered during drive selection.

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25. Cement and Aggregate Applications

Cement and aggregate facilities use large motors throughout the production process.

The drive can be considered for:

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

Variable-speed operation can improve process control and reduce mechanical stress during starting and stopping.

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26. Steel and Metal Processing Applications

Steel and metal-processing plants often require high-power motor control.

Potential applications include:

• Cooling-water pumps
• Process fans
• Material handling
• Large conveyors
• Extraction systems
• Ventilation
• Auxiliary process machinery

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

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27. Paper and Pulp Applications

Paper machinery often uses several motors operating as part of one coordinated production process.

Typical applications include:

• Vacuum systems
• Pumps
• Fans
• Roll drives
• Stock preparation
• Material handling
• Process-air systems

A common DC bus can be valuable when several drive sections operate together.

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28. Compressor Applications

Large compressors can require several hundred kilowatts of motor power.

The drive can provide controlled acceleration and variable-speed operation when compatible with the compressor design.

Potential advantages include:

• Controlled starting
• Reduced mechanical shock
• Adjustable speed
• Process regulation
• Centralized monitoring
• Industrial network integration

The compressor load profile should be evaluated before selecting the duty classification.

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29. Main Product Advantages

29.1 Very High Current Capability

The drive’s 770 A Normal Duty rating is its most important electrical characteristic.

This makes it suitable for very large industrial motors.

The three main continuous ratings are:

• 832 A Light Duty
• 770 A Normal Duty
• 642 A Heavy Duty

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29.2 High Power Capacity

The drive provides approximately:

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

This places it firmly within the large industrial drive category.

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29.3 Common DC Bus

The DC input configuration allows the drive to participate in common DC bus architectures.

This is especially useful in large multi-drive systems.

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29.4 Embedded EtherNet/IP

Embedded EtherNet/IP provides a convenient connection to modern industrial control architectures.

It can improve:

• Monitoring
• Diagnostics
• Control
• Data collection
• Maintenance visibility

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29.5 Flexible Duty Classification

The Light Duty, Normal Duty, and Heavy Duty ratings allow the drive to be matched to different machine characteristics.

This is more useful than selecting a drive solely by nominal horsepower.

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29.6 Large Industrial Motor Support

The 20G14TC770AN0NNNNN is designed for applications involving very large motors.

It is appropriate for large-scale industrial machinery rather than compact machine automation.

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29.7 Scalable PowerFlex Architecture

The PowerFlex 755 platform includes multiple drive ratings.

This allows industrial facilities to standardize on a common drive family across different machine capacities.

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30. Advantages for System Integrators

System integrators can benefit from using the same general drive architecture across multiple machine sizes.

This can simplify:

• Electrical engineering
• PLC integration
• HMI design
• Network configuration
• Commissioning
• Troubleshooting
• Maintenance training
• Spare-parts planning

The availability of closely related Frame 8 current ratings also makes system expansion easier.

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31. Advantages for OEM Machine Builders

OEM machine builders can use the PowerFlex 755 family to create standardized electrical designs.

A machine may use a smaller drive in one configuration and a 770 A-class drive in a larger configuration while maintaining a similar control philosophy.

This can reduce engineering effort.

It can also simplify:

• Documentation
• Software development
• Commissioning
• Service training
• Customer support
• Spare-parts planning

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32. Advantages for Plant Operators

Plant operators benefit from controlled motor operation.

Instead of starting a large motor directly across the line, the drive can control acceleration and operating speed.

This can help reduce mechanical shock.

Network integration also allows operating information to be presented through a centralized control system.

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33. Advantages for Maintenance Personnel

The PowerFlex 755 architecture can provide useful diagnostic information.

Maintenance teams can monitor drive status and investigate faults through the plant control system.

This can reduce the time needed to identify problems.

For a critical production machine, faster troubleshooting can have a direct impact on plant availability.

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34. Energy Management Advantages

Variable-speed control can provide significant energy-saving opportunities in appropriate applications.

The strongest examples are generally variable-torque loads.

These include:

• Pumps
• Fans
• Blowers

If a process does not require full-speed operation continuously, reducing motor speed can reduce energy consumption.

Actual savings depend on the process, operating hours, load profile, motor efficiency, and control strategy.

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35. Five Recommended Models from the Same Series

The following models are closely related PowerFlex 755 common-DC-bus models in the same 400 VAC-class Frame 8 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
20G14TC750JN0NNNNN	796 A / 450 kW	750 A / 400 kW	585 A / 315 kW	8	Approx. 2145 × 778 × 421 mm	Approx. 162 kg

These are useful alternatives when the motor current is below the 770 A range.

For a lower current requirement, the 650 A and 750 A versions may be more appropriate.

The 770 A version provides the highest current capacity among these commonly compared Frame 8 TC configurations.

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36. Detailed Comparison of the TC Series

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

The progression makes the selection logic relatively straightforward.

The 460 A model is suitable for a lower-current application.

The 540 A and 567 A versions cover the middle range.

The 650 A and 750 A versions address larger motors.

The 770 A version is suitable when the application approaches the upper end of this Frame 8 current range.

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37. Five Related PowerFlex 755 Models for 690 VAC Applications

For projects using a different voltage class, the following models are useful related PowerFlex 755 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 models rather than direct substitutes.

The 690 VAC models operate in a different voltage class and are intended for different motor systems.

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38. Five Popular Allen-Bradley Models

The following five models represent commonly encountered products from the same brand and cover substantially smaller power ranges.

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

The smaller PowerFlex 525 models are more appropriate for compact machines and lower-power motors.

The 20G11NC-series PowerFlex 755 models are more suitable for medium-sized industrial systems.

The 20G14TC770AN0NNNNN is positioned much higher in the power range and is intended for very large industrial motors.

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39. 650 A vs 750 A vs 770 A Selection

Parameter	20G14TC650JN0NNNNN	20G14TC750JN0NNNNN	20G14TC770AN0NNNNN
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
Cooling	Forced Air	Forced Air	Forced Air
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 when selecting a drive around the 650–770 A range.

The 650 A model is a sensible choice when the motor current is well below 750 A.

The 750 A model becomes appropriate as the application approaches 750 A Normal Duty.

The 770 A model provides the highest Normal Duty current in this comparison and offers a meaningful increase in Heavy Duty capability.

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40. Motor Selection Considerations

Motor selection should begin with the motor nameplate rather than the drive catalog number.

Important information includes:

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

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

Two motors with the same nominal kW rating may have different full-load currents.

Therefore, a 400 kW motor should not automatically be matched to a 770 A drive without checking its actual nameplate current.

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41. High-Inertia Load Considerations

High-inertia loads can create significant demands on the drive.

Examples include:

• Large fans
• Large blowers
• Mills
• Centrifuges
• Rollers
• Flywheel systems
• Large conveyors

During acceleration, the drive must supply enough torque to accelerate the machine.

During deceleration, stored mechanical energy can return to the DC bus.

Because this catalog configuration does not include internal dynamic braking hardware, the braking strategy should be evaluated separately for applications requiring fast stopping.

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42. Cabinet Design

The Frame 8 dimensions require a properly engineered cabinet.

The approximate drive envelope is:

2145 × 778 × 421 mm

The cabinet must also accommodate:

• Power cables
• Control cables
• Network cables
• Grounding
• Airflow
• Service access
• Cable bending radius
• Protection equipment
• Auxiliary components

The final cabinet will therefore normally be larger than the drive dimensions.

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43. Thermal Management

Thermal design is particularly important for a drive of this size.

The cabinet should provide sufficient airflow and heat-removal capacity.

Design considerations include:

• Ambient temperature
• Drive losses
• Cabinet temperature
• Fan capacity
• Air inlet temperature
• Air outlet temperature
• Filter condition
• Installation altitude
• Continuous load

The cooling system should be maintained regularly.

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44. Maintenance Recommendations

A large industrial drive should be incorporated into a preventive-maintenance program.

Recommended inspection areas include:

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

Cooling fans deserve particular attention because their failure can quickly increase drive temperature.

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45. Spare Parts Planning

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

Potential spare categories include:

• Cooling components
• Control components
• Communication components
• Power components
• Protection components
• Installation accessories

For extremely critical processes, maintaining an appropriate replacement-drive strategy may also be justified.

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46. Practical Application Selection

Application	Recommended Duty	Main Concern
Large Centrifugal Pump	LD / ND	Motor current
Large Fan	LD / ND	Variable-torque load
Large Blower	LD / ND	Continuous operation
Conveyor	ND / HD	Starting torque
Mining Conveyor	ND / HD	Loaded starting
Crusher	HD	High torque
Mill	HD	Inertia and regeneration
Cement Conveyor	ND / HD	Mechanical loading
Steel Process Fan	LD / ND	Continuous operation
Paper Machinery	ND	Coordinated drives
Large Compressor	ND / HD	Compressor torque
Material Handling	ND / HD	Acceleration and deceleration

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47. Selection Logic for the Five Same-Series Alternatives

20G14TC460JN0NNNNN

Best considered when the application requires approximately:

• 460 A Normal Duty
• 250 kW Normal Duty
• 200 kW Heavy Duty

20G14TC540JN0NNNNN

Best considered when the application requires approximately:

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

20G14TC567JN0NNNNN

Best considered when the application requires approximately:

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

20G14TC650JN0NNNNN

Best considered when the application requires approximately:

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

20G14TC750JN0NNNNN

Best considered when the application requires approximately:

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

20G14TC770AN0NNNNN

The requested model is appropriate when the application requires approximately:

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

The key difference between the models is primarily electrical capacity rather than a completely different mechanical platform.

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48. Why Choose the 20G14TC770AN0NNNNN?

The main reason to select the 20G14TC770AN0NNNNN is its combination of very high current capacity and large industrial application flexibility.

With approximately 832 A Light Duty, 770 A Normal Duty, and 642 A Heavy Duty, the model can support a wide range of large-motor applications.

The approximately 400 kW Normal Duty rating is particularly useful for large industrial motors.

The approximately 355 kW Heavy Duty rating also gives it a strong position in high-torque applications.

Its Frame 8 architecture provides a standardized mechanical platform shared with several nearby current ratings.

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49. Product Positioning

The 20G14TC770AN0NNNNN can be positioned as a:

High-Power 400 VAC Frame 8 PowerFlex 755 Common-DC-Bus AC Drive

Its primary application sectors include:

• Mining
• Cement
• Steel
• Paper
• Water treatment
• Material handling
• Industrial pumping
• Industrial ventilation
• Large conveyors
• Heavy process machinery

It is best suited to applications where large motors operate continuously and require controlled speed and torque.

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50. Final Technical Parameter Table

Category	Final Specification
Model / Part Number	20G14TC770AN0NNNNN
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	Air-Cooled AC Drive
Input Type	DC Input with Precharge
AC Voltage Class	400 VAC
Phase	Three Phase
Nominal DC Bus	540 VDC
Light Duty	832 A / 450 kW
Normal Duty	770 A / 400 kW
Heavy Duty	642 A / 355 kW
Frame	8
Enclosure	Open Type
Cooling	Forced Air
Filtering	EMC Filter
Configuration	AN
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
Height	Approx. 2145 mm
Width	Approx. 778 mm
Depth	Approx. 421 mm
Dimensions	Approx. 2145 × 778 × 421 mm
Weight	Approx. 162 kg
Common DC Bus	Yes
Main Applications	Pumps, fans, conveyors, compressors, mining, cement, steel, paper, material handling
Replacement Configuration	20G14TC770JN0NNNNN

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51. Final Product Assessment

The Allen-Bradley 20G14TC770AN0NNNNN is a high-power PowerFlex 755 AC drive intended for demanding industrial motor-control applications.

Its 770 A Normal Duty rating and approximately 400 kW Normal Duty capacity make it suitable for very large motors.

Its 832 A Light Duty rating increases its suitability for variable-torque applications such as large pumps, fans, and blowers.

Its 642 A Heavy Duty rating provides useful capacity for demanding applications involving higher torque, greater inertia, or more severe loading.

The DC input with precharge configuration makes it well suited to common DC bus architectures, especially where several large drive sections operate as part of the same industrial machine.

The embedded EtherNet/IP capability provides a practical connection to modern industrial control systems.

The Frame 8 mechanical construction, approximately 2145 × 778 × 421 mm dimensions, and approximately 162 kg weight indicate that this is a substantial industrial component and should be installed with appropriate mechanical handling, cabinet support, ventilation, and service access.

The absence of internal dynamic braking hardware should be considered carefully for applications that require frequent or rapid deceleration.

The AN configuration is also important. It should not be treated as identical to the JN configuration simply because the current and power ratings are similar. The filter and common-mode configuration should be matched to the existing installation when replacing equipment.

For applications below the 770 A range, the closely related 20G14TC650JN0NNNNN and 20G14TC750JN0NNNNN models are useful alternatives.

For applications requiring a different voltage class, the 690 VAC PowerFlex 755 models provide another related product group.

Overall, the 20G14TC770AN0NNNNN is best described as a large Frame 8, 400 VAC-class PowerFlex 755 common-DC-bus AC drive with 832 A Light Duty, 770 A Normal Duty, and 642 A Heavy Duty current capability.

It is particularly well suited to large industrial pumping, ventilation, conveying, mining, cement, steel, paper, material-handling, compressor, and process-machinery applications where high motor current, controlled speed, network integration, and robust industrial drive architecture are required.