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20G11TC750JN0NNNNN – Detailed Product Information, Technical Parameters, Applications, Advantages and Related Models

1. Product Overview

The 20G11TC750JN0NNNNN is a high-power AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase industrial motors and is particularly suitable for applications where high motor current, stable speed control, controlled acceleration and industrial network communication are required.

The unit is a 400 VAC, three-phase, Frame 8 air-cooled drive with a 750 A normal-duty output rating.

Its principal power ratings are:

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

The drive is configured with an integrated EtherNet/IP communication interface, an EMC filter, AC input with precharge and DC terminals, and a common-mode capacitor jumper installed.

The model has no dynamic braking option and is supplied in an open-type configuration without a HIM keypad/display.

Because of its large current and power capacity, the product is intended mainly for large industrial machinery rather than small or medium-sized motor systems.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product category	AC Variable Frequency Drive
Drive type	High-power AC drive
Cooling method	Forced air / air cooled
Frame size	Frame 8
Voltage class	400 VAC
Input phase	Three phase
Communication	Embedded EtherNet/IP
Input configuration	AC input with precharge and DC terminals
Filtering	EMC filtered
CM capacitor configuration	Jumper installed
Dynamic braking	None
HIM	Blank / no HIM
Enclosure construction	Open type
Primary application	Large industrial AC motors

The most important identification is therefore:

Allen-Bradley → PowerFlex → PowerFlex 755 → 20G11TC750JN0NNNNN

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3. Model Number Interpretation

The complete catalog number is:

20G11TC750JN0NNNNN

The model coding identifies a specific configuration of the PowerFlex 755 platform.

The most important practical characteristics represented by this configuration are:

Configuration Item	Description
Product	PowerFlex 755 AC Drive
Voltage class	400 VAC
Phase	3 phase
Current class	750 A normal duty
Light-duty rating	796 A / 450 kW
Normal-duty rating	750 A / 400 kW
Heavy-duty rating	585 A / 315 kW
Frame	Frame 8
Cooling	Forced air
Input	AC input with precharge
DC terminals	Yes
Filter	EMC filter
CM jumper	Installed
Dynamic braking	None
HIM	Blank / no HIM
Communication	Embedded EtherNet/IP
Enclosure	Open type

The J configuration is particularly important because it indicates the common-mode capacitor jumper is installed.

This makes the model different from the closely related 20G11TC750AN0NNNNN, where the common-mode capacitor jumper is removed.

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4. Main Technical Parameters

Parameter	Specification
Model	20G11TC750JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	AC variable frequency drive
Input voltage class	400 VAC
Nominal input voltage	400 VAC
Input phase	3 phase
Normal-duty output current	750 A
Light-duty output current	796 A
Heavy-duty output current	585 A
Light-duty power	450 kW
Normal-duty power	400 kW
Heavy-duty power	315 kW
Frame size	Frame 8
Cooling	Forced air
Input type	AC input with precharge
DC terminals	Yes
EMC filter	Yes
Common-mode capacitor jumper	Installed
Dynamic braking	None
Communication	Embedded EtherNet/IP
HIM	Blank / no HIM
Enclosure	Open type
Protection configuration	Standard
Installation class	Industrial
Approx. weight	325 kg
Approx. height	About 1900 mm class
Approx. width	About 850 mm class
Approx. depth	About 425 mm class
Recommended use	Large industrial motors

The weight should be treated as an approximate equipment-planning value. Actual shipping or installed weight can vary according to the final configuration, packaging and accessories.

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5. Electrical Rating Table

The three principal duty ratings are especially important when selecting this drive.

Duty Classification	Continuous Output Current	Power Rating
Light Duty	796 A	450 kW
Normal Duty	750 A	400 kW
Heavy Duty	585 A	315 kW

The drive should not be selected solely by motor kW.

Motor nameplate current, load torque, acceleration requirements, operating cycle and overload requirements should all be considered.

For example, a motor rated below 400 kW may still require careful drive selection if the application has high starting torque or frequent acceleration and deceleration.

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6. Product Introduction

The 20G11TC750JN0NNNNN is intended to control large three-phase AC motors by varying the electrical frequency and voltage supplied to the motor.

Instead of allowing the motor to run continuously at a fixed speed, the drive can adjust motor speed according to the requirements of the machine or production process.

This provides several practical benefits.

The drive can control:

• Motor starting
• Motor stopping
• Acceleration
• Deceleration
• Motor speed
• Direction of rotation
• Process speed
• Torque-related operating conditions
• Fault and status information
• Network-based control commands

For large industrial equipment, this type of control can provide much smoother operation than direct-on-line motor starting.

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7. Working Principle

A simplified drive system can be represented as:

Three-Phase AC Supply

↓

Input and Precharge Section

↓

DC Bus

↓

Inverter Power Section

↓

Variable-Frequency AC Output

↓

Three-Phase Motor

↓

Mechanical Load

The input electrical power is converted into a controlled output suitable for the motor.

The drive continuously controls the inverter switching process so that the motor can operate at the required speed and torque.

This is particularly useful when the process does not require the motor to run at full speed all the time.

---

8. 400 VAC Three-Phase Design

The product belongs to the 400 VAC three-phase class.

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

Electrical Item	Specification
Nominal voltage	400 VAC
Voltage class	380–400 VAC class
Input phase	Three phase
Normal-duty current	750 A
Normal-duty power	400 kW
Light-duty current	796 A
Heavy-duty current	585 A
Frequency	Industrial AC supply
Motor output	Variable-frequency three-phase AC

The actual incoming electrical supply should always be checked against the equipment nameplate and installation requirements.

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9. Light-Duty Rating

The light-duty rating is:

796 A / 450 kW

This is the highest power rating associated with this particular Frame 8 configuration.

Light-duty operation is generally appropriate for applications where the load characteristics are relatively smooth and the motor does not continuously experience severe torque demand.

Typical examples include:

• Large centrifugal pumps
• Large centrifugal fans
• Cooling fans
• Industrial ventilation
• Large blowers
• Water circulation equipment
• Process air systems

For these applications, the drive can regulate motor speed according to the actual process demand.

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10. Normal-Duty Rating

The normal-duty rating is:

750 A / 400 kW

This is the primary rating of the specified model.

Parameter	Normal Duty
Continuous current	750 A
Power	400 kW
Voltage class	400 VAC
Phase	3 phase
Frame	8
Cooling	Forced air

The 400 kW normal-duty rating makes this product suitable for very large industrial machines.

Possible applications include:

• Large conveyors
• Large process pumps
• Large blowers
• Large fans
• Material-handling machinery
• Industrial process equipment
• Large production machinery

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11. Heavy-Duty Rating

The heavy-duty rating is:

585 A / 315 kW

Parameter	Heavy Duty
Continuous current	585 A
Power	315 kW
Voltage class	400 VAC
Phase	3 phase
Frame	8

Heavy-duty operation is more relevant when the mechanical load requires greater torque or experiences more demanding operating conditions.

Typical applications may include:

• Heavy conveyors
• Mixers
• Crushers
• Rollers
• Material-handling systems
• High-inertia machinery
• Process machines with demanding starting conditions

The actual motor current must remain within the appropriate drive rating.

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12. Embedded EtherNet/IP

One of the useful characteristics of this model is the integrated EtherNet/IP communication capability.

This allows the drive to communicate with an industrial controller or automation system.

Typical commands may include:

• Start
• Stop
• Enable
• Speed reference
• Direction
• Fault reset
• Operating mode selection

Typical feedback information may include:

• Output frequency
• Motor current
• Drive status
• Fault status
• Warning status
• Operating condition
• Diagnostic information

For large automated production systems, network communication can simplify the overall control architecture.

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13. Application – Large Pumps

Large pumps are one of the most natural applications for a high-power variable frequency drive.

Potential applications include:

• Industrial water pumps
• Cooling-water systems
• Process pumps
• Water-treatment systems
• Wastewater systems
• Large circulation pumps
• Transfer pumps
• Industrial fluid systems

The drive can adjust pump speed according to the required flow rate.

When full flow is unnecessary, the pump can operate at a lower speed.

This can provide:

• Better flow control
• Reduced throttling
• Smoother operation
• Lower mechanical stress
• Potential energy savings
• Improved process stability

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14. Application – Large Fans

Large industrial fans often benefit from variable-speed control.

Typical applications include:

• Industrial ventilation
• Furnace ventilation
• Exhaust systems
• Cooling systems
• Factory ventilation
• Process ventilation
• Large air-handling equipment

The motor does not necessarily need to operate continuously at maximum speed.

The drive can adjust fan speed according to airflow requirements.

This provides better process control and can reduce unnecessary energy consumption.

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15. Application – Large Blowers

Industrial blowers can require hundreds of kilowatts of motor power.

The 20G11TC750JN0NNNNN is suitable for appropriately sized blower systems.

Potential applications include:

• Wastewater aeration
• Process air
• Industrial air systems
• Furnace systems
• Chemical processing
• Manufacturing processes

The required minimum speed, maximum speed, motor cooling and load profile should be checked during application engineering.

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16. Application – Conveyors

Large conveyors can have substantial mechanical inertia.

A direct-on-line start can produce a sudden torque increase.

A variable frequency drive allows the conveyor to accelerate gradually.

This can help reduce stress on:

• Belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Drive pulleys

Possible applications include:

• Bulk material handling
• Mining-related equipment
• Cement production
• Manufacturing plants
• Warehouses
• Processing plants

For particularly heavy conveyors, the heavy-duty rating should be carefully evaluated.

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17. Application – Mixers

Large industrial mixers can require high starting torque.

When material is already inside the mixing vessel, starting torque can be considerably higher than the unloaded condition.

The drive allows controlled acceleration and can provide more flexible speed control.

Possible applications include:

• Chemical processing
• Industrial mixing
• Material processing
• Manufacturing
• Large tank systems
• Process production lines

Motor current and starting torque should be checked carefully before selecting the drive.

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18. Application – Compressors

Large compressors can also use variable frequency drive technology where the compressor manufacturer and system design permit variable-speed operation.

Important considerations include:

• Minimum operating speed
• Maximum operating speed
• Motor current
• Compressor torque
• Starting requirements
• Acceleration time
• Deceleration time
• Regenerative energy
• Motor cooling

A compressor should therefore be evaluated according to its complete operating envelope rather than simply its nominal motor power.

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19. Application – Industrial Process Machinery

The product can also be used in large process machines.

Examples include:

• Large rollers
• Industrial production equipment
• Material-processing machines
• Large winding systems
• Large mechanical drives
• Heavy-duty production equipment

The ability to control speed through an industrial automation system is useful where machine speed needs to change according to production conditions.

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20. Main Product Advantages

Advantage	Practical Benefit
750 A normal-duty rating	Suitable for very large motors
796 A light-duty rating	Supports high-power variable-torque applications
585 A heavy-duty rating	Supports demanding loads within the heavy-duty rating
400 kW normal-duty power	Suitable for large industrial machinery
450 kW light-duty power	Higher capacity for suitable applications
PowerFlex 755 architecture	Suitable for advanced industrial motor control
Embedded EtherNet/IP	Convenient automation-system integration
Forced-air cooling	Suitable for high-power installations
EMC filtering	Helps address electrical-noise requirements
CM jumper installed	Provides the specified common-mode configuration
Variable-speed operation	Allows motor speed to follow process requirements
Controlled acceleration	Reduces mechanical shock
Controlled deceleration	Provides flexible stopping profiles
High-current capability	Suitable for very large motors
Frame 8 construction	Designed for high-power industrial installations

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21. Common-Mode Capacitor Jumper Installed

The letter J in the model configuration is important.

For this configuration, the common-mode capacitor jumper is:

Installed

This distinguishes the product from the related A configuration.

Model	CM Capacitor Jumper
20G11TC750JN0NNNNN	Installed
20G11TC750AN0NNNNN	Removed

When replacing an existing drive, this distinction should not be ignored.

The two models have essentially the same primary current and power class, but their common-mode capacitor configurations differ.

The electrical grounding arrangement and EMC design of the installation should therefore be reviewed before selecting a replacement.

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22. EMC Filter

The drive is configured with an EMC filter.

Variable frequency drives use high-speed electronic switching to generate controlled motor output.

This switching process can produce electromagnetic noise.

An EMC filter helps control the electrical-noise characteristics of the drive installation.

The overall installation should also pay attention to:

• Grounding
• Motor-cable routing
• Cable shielding
• Cabinet layout
• Separation of power and control wiring
• Motor cable length
• Ground connections

The filter should be considered as one part of the complete EMC installation design.

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23. Dynamic Braking

The specified configuration does not include dynamic braking.

This is an important point for applications with high inertia or frequent deceleration.

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

If the application requires rapid deceleration, the DC bus can experience increased voltage.

Applications that may require special attention include:

• Heavy conveyors
• Large rollers
• Centrifuges
• High-inertia fans
• Large rotating machinery
• Rapid-cycle equipment

If fast stopping is required, the complete braking solution should be evaluated during system design.

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24. Physical Dimensions

The product is a large Frame 8 drive.

For preliminary planning, the physical envelope can be considered approximately as follows:

Mechanical Parameter	Approximate Value
Model	20G11TC750JN0NNNNN
Frame	Frame 8
Approx. height	1900 mm class
Approx. width	850 mm class
Approx. depth	425 mm class
Approx. weight	325 kg
Cooling	Forced air
Construction	Open type
Installation	Industrial cabinet / suitable enclosure

The dimensions above are suitable for preliminary equipment planning only.

For final cabinet design, mounting-hole positioning, lifting arrangements and service clearances, the dimensional drawing for the actual configuration should be used.

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25. Weight and Transportation

The approximate drive weight is:

325 kg

This is a substantial mechanical load.

Transportation and installation should therefore be planned before the equipment reaches the installation site.

Important considerations include:

• Transportation route
• Lifting equipment
• Forklift capacity
• Floor loading
• Cabinet structure
• Mounting supports
• Service access
• Maintenance access
• Removal and replacement procedures

For a Frame 8 drive of this size, appropriate mechanical handling equipment is normally required.

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26. Cooling Requirements

The drive uses forced-air cooling.

Because the product operates at hundreds of amps, thermal management is particularly important.

The installation should provide adequate airflow and should avoid recirculating hot exhaust air back into the cooling inlet.

Important factors include:

• Ambient temperature
• Cabinet ventilation
• Airflow
• Cooling fan condition
• Dust accumulation
• Air inlet temperature
• Exhaust temperature
• Installation clearance

Poor cooling can cause:

• Overtemperature faults
• Reduced operating capability
• Increased component stress
• Reduced service life
• Unexpected shutdowns

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27. Motor Selection Requirements

The motor should be selected based on complete nameplate information rather than power alone.

Motor Parameter	Importance
Rated voltage	Must be compatible with drive output
Rated current	Critical for drive sizing
Rated power	Used together with current
Rated frequency	Required for motor configuration
Rated speed	Determines operating range
Power factor	Affects motor current
Efficiency	Affects total system loading
Service factor	Important for application assessment
Motor type	Determines control requirements
Starting torque	Important for heavy-duty loads
Motor inertia	Important for acceleration/deceleration
Minimum speed	Important for cooling and machine operation
Maximum speed	Important for mechanical safety

The motor’s rated current should be compared with the appropriate 750 A drive rating.

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28. Energy-Saving Potential

One of the major reasons for using variable frequency drive technology is the possibility of reducing energy consumption in variable-torque applications.

This is particularly relevant to:

• Pumps
• Fans
• Blowers

For example, a large fan may not need maximum airflow during every stage of production.

Reducing motor speed can reduce the power required by the mechanical system.

Potential benefits include:

• Reduced electrical consumption
• Better process control
• Reduced throttling
• Lower mechanical stress
• Reduced wear
• Improved operating flexibility

Actual energy savings depend on the specific machine, operating conditions and load profile.

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29. Controlled Motor Starting

Large motors can create substantial mechanical and electrical stress during starting.

A variable frequency drive provides a controlled acceleration profile.

This can reduce sudden torque changes.

Potential benefits include:

• Reduced gearbox shock
• Reduced coupling stress
• Reduced belt stress
• Reduced shaft stress
• Reduced mechanical vibration
• Smoother material movement
• Better production stability

This feature is particularly valuable for large high-inertia machines.

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30. Controlled Motor Stopping

The drive can also control motor deceleration.

The appropriate deceleration time depends on:

• Motor inertia
• Mechanical load
• Required stopping time
• Process requirements
• Braking capability
• DC-bus behavior

For applications requiring very rapid stopping, the lack of an integrated dynamic braking option in this configuration should be considered.

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31. Industrial Network Integration

A typical automated installation may be arranged as:

Industrial Controller

↓

EtherNet/IP Network

↓

20G11TC750JN0NNNNN

↓

Large AC Motor

↓

Mechanical Machine

This architecture allows the controller to issue commands and receive operating information from the drive.

The drive can therefore form part of a larger plant automation system.

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32. Typical Control Information

The following types of information may be exchanged between the drive and the control system:

Control / Status	Example
Start command	Motor start
Stop command	Controlled stop
Speed reference	Requested motor speed
Direction	Forward / reverse
Enable	Drive enable
Fault reset	Clear recoverable fault
Output frequency	Actual operating frequency
Motor current	Current loading
Drive status	Running / stopped
Fault status	Fault condition
Warning status	Warning condition
Diagnostic information	Operating condition

This makes the drive suitable for centralized industrial control.

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33. Maintenance Recommendations

Large industrial drives should be included in a preventive maintenance program.

Maintenance Area	Inspection
Cooling fans	Check operation and abnormal noise
Air passages	Check for blockage
Cabinet ventilation	Confirm adequate airflow
Power connections	Check condition
Grounding	Verify proper connections
Motor cables	Inspect insulation and terminations
Network cables	Inspect communication connections
Drive temperature	Check for abnormal heating
Fault history	Review repeated faults
Cabinet cleanliness	Remove excessive dust
Mounting	Check mechanical integrity
Environment	Check temperature and humidity

Regular inspection can reduce the possibility of unexpected production downtime.

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34. Troubleshooting Reference

Symptom	Possible Investigation Area
Motor does not start	Start command, enable, fault status
Overcurrent	Motor load, acceleration time, motor data
Overload	Motor current and mechanical load
DC-bus overvoltage	Deceleration and regeneration
Overtemperature	Cooling, airflow, ambient temperature
Communication failure	Network and controller configuration
Incorrect motor speed	Speed reference and scaling
Excessive vibration	Motor and mechanical system
Electrical interference	Grounding, shielding and cable routing
Repeated trips	Load profile and drive sizing

Troubleshooting should begin with the drive status and fault information before changing parameters unnecessarily.

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35. Five Same-Series / Closely Related Models

The following five models are particularly relevant because they belong to the same high-power 400 VAC PowerFlex 755 group.

Model	Voltage	Light Duty	Normal Duty	Heavy Duty	Frame	Main Difference
20G11TC460JN0NNNNN	400 VAC	540 A / 315 kW	460 A / 250 kW	385 A / 200 kW	8	Lower capacity
20G11TC540JN0NNNNN	400 VAC	585 A / 315 kW	540 A / 315 kW	456 A / 250 kW	8	Lower current
20G11TC567JN0NNNNN	400 VAC	612 A / 355 kW	567 A / 315 kW	472 A / 250 kW	8	Intermediate capacity
20G11TC650JN0NNNNN	400 VAC	750 A / 400 kW	650 A / 355 kW	540 A / 315 kW	8	Closest lower-current option
20G11TC770JN0NNNNN	400 VAC	832 A / 450 kW	770 A / 400 kW	642 A / 355 kW	8	Higher-current option

These models are useful for selecting a drive according to actual motor current and duty requirements.

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36. Related Model 1 – 20G11TC460JN0NNNNN

The 20G11TC460JN0NNNNN is a lower-capacity member of the same high-power product family.

Parameter	Specification
Model	20G11TC460JN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty current	540 A
Normal-duty current	460 A
Heavy-duty current	385 A
Light-duty power	315 kW
Normal-duty power	250 kW
Heavy-duty power	200 kW
Cooling	Forced air
EMC filter	Yes
CM jumper	Installed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. weight	Frame 8 large-drive class
Approx. dimensions	Large Frame 8 class

This model may be considered when a 750 A drive would provide excessive capacity for the motor.

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37. Related Model 2 – 20G11TC540JN0NNNNN

The 20G11TC540JN0NNNNN provides a lower current rating while retaining the same general high-power architecture.

Parameter	Specification
Model	20G11TC540JN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty current	585 A
Normal-duty current	540 A
Heavy-duty current	456 A
Light-duty power	315 kW
Normal-duty power	315 kW
Heavy-duty power	250 kW
Cooling	Forced air
EMC filter	Yes
CM jumper	Installed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. weight	Frame 8 large-drive class
Approx. dimensions	Large Frame 8 class

This is a practical alternative for motors requiring less current than the 750 A version.

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38. Related Model 3 – 20G11TC567JN0NNNNN

The 20G11TC567JN0NNNNN sits between the 540 A and 650 A normal-duty configurations.

Parameter	Specification
Model	20G11TC567JN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty current	612 A
Normal-duty current	567 A
Heavy-duty current	472 A
Light-duty power	355 kW
Normal-duty power	315 kW
Heavy-duty power	250 kW
Cooling	Forced air
EMC filter	Yes
CM jumper	Installed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. weight	Frame 8 large-drive class
Approx. dimensions	Large Frame 8 class

It can be useful when the motor current is above the 540 A configuration but below the larger 650 A configuration.

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39. Related Model 4 – 20G11TC650JN0NNNNN

The 20G11TC650JN0NNNNN is one of the closest alternatives to the specified model.

Parameter	Specification
Model	20G11TC650JN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty current	750 A
Normal-duty current	650 A
Heavy-duty current	540 A
Light-duty power	400 kW
Normal-duty power	355 kW
Heavy-duty power	315 kW
Cooling	Forced air
EMC filter	Yes
CM jumper	Installed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. weight	Frame 8 large-drive class
Approx. dimensions	Large Frame 8 class

This model is especially useful when the motor requires less than 750 A normal-duty current.

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40. Related Model 5 – 20G11TC770JN0NNNNN

The 20G11TC770JN0NNNNN provides a higher normal-duty current rating than the specified model.

Parameter	Specification
Model	20G11TC770JN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty current	832 A
Normal-duty current	770 A
Heavy-duty current	642 A
Light-duty power	450 kW
Normal-duty power	400 kW
Heavy-duty power	355 kW
Cooling	Forced air
EMC filter	Yes
CM jumper	Installed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. weight	Frame 8 large-drive class
Approx. dimensions	Large Frame 8 class

This is a useful higher-current alternative where additional current capacity is required.

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41. Comparison of the Five Closest Models

Parameter	20G11TC460JN0NNNNN	20G11TC540JN0NNNNN	20G11TC567JN0NNNNN	20G11TC650JN0NNNNN	20G11TC770JN0NNNNN
Voltage class	400 V	400 V	400 V	400 V	400 V
Phase	3	3	3	3	3
Frame	8	8	8	8	8
Light-duty current	540 A	585 A	612 A	750 A	832 A
Normal-duty current	460 A	540 A	567 A	650 A	770 A
Heavy-duty current	385 A	456 A	472 A	540 A	642 A
Light-duty power	315 kW	315 kW	355 kW	400 kW	450 kW
Normal-duty power	250 kW	315 kW	315 kW	355 kW	400 kW
Heavy-duty power	200 kW	250 kW	250 kW	315 kW	355 kW
Cooling	Air	Air	Air	Air	Air
EMC filter	Yes	Yes	Yes	Yes	Yes
CM jumper	Installed	Installed	Installed	Installed	Installed
Dynamic braking	None	None	None	None	None
EtherNet/IP	Yes	Yes	Yes	Yes	Yes

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42. Five Same-Brand Popular Model Recommendations

For applications with smaller motors, several other models from the same brand family can be considered.

These are not direct electrical replacements for the 750 A Frame 8 drive. They are broader alternatives for different motor sizes and machine requirements.

Model	Product Series	Voltage Class	Current Class	Approx. Power Class	Typical Application	Approx. Dimensions	Approx. Weight
20G11ND014AA0NNNNN	PowerFlex 755	480 VAC class	14 A	10 HP class	Pumps, fans, conveyors	Small frame	Approx. 10 kg
20G11ND022AA0NNNNN	PowerFlex 755	480 VAC class	22 A	15 HP class	General machinery	Small frame	Approx. 10–15 kg
20G11ND027AA0NNNNN	PowerFlex 755	480 VAC class	27 A	20 HP class	Industrial machinery	Small frame	Approx. 15 kg
25B-D6P0N104	PowerFlex 525	480 VAC class	6 A class	3 HP class	Compact machinery	Compact frame	Approx. 3 kg
25B-D011N104	PowerFlex 525	480 VAC class	11 A class	5 HP class	Small industrial equipment	Compact frame	Approx. 4 kg

These smaller products should not be substituted directly for the 750 A unit without checking the motor rating, load type, enclosure, voltage and application requirements.

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43. Same-Brand Model Selection by Application

Application	Recommended Model Range	Reason
Small pump	PowerFlex 525 class	Compact and economical
Small fan	PowerFlex 525 class	Suitable for smaller motors
Medium industrial machine	PowerFlex 755 smaller-frame class	More advanced control
Large pump	PowerFlex 755 Frame 8	High-current capability
Large fan	PowerFlex 755 Frame 8	High-power variable-speed operation
Large blower	PowerFlex 755 Frame 8	High continuous current
Large conveyor	PowerFlex 755 Frame 8	High torque and controlled acceleration
Heavy process machine	PowerFlex 755	Flexible motor-control capability

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44. Advantages Compared with Fixed-Speed Motor Control

A variable frequency drive can provide several advantages compared with simply connecting a motor directly to the electrical supply.

Controlled Starting

The motor can accelerate gradually instead of immediately reaching full speed.

Reduced Mechanical Shock

Gradual acceleration can reduce stress on mechanical components.

Adjustable Speed

The motor can operate at the speed required by the process.

Process Control

Machine output can be adjusted without relying entirely on mechanical throttling.

Potential Energy Savings

Variable-speed operation can reduce energy consumption in suitable variable-torque applications.

Network Integration

The drive can communicate with a larger automation system.

Diagnostic Capability

Drive status and fault information can be monitored.

Flexible Operation

Different operating speeds can be configured for different production conditions.

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45. Advantages of the 750 A Configuration

The 750 A version provides a particularly high current capacity.

This makes it appropriate for large motors where smaller Frame 8 configurations would not provide sufficient current.

The main advantages are:

1. High normal-duty current of 750 A
2. 400 kW normal-duty power capability
3. 450 kW light-duty capability
4. 315 kW heavy-duty capability
5. Three-phase 400 VAC design
6. Embedded EtherNet/IP communication
7. Forced-air cooling
8. EMC-filtered configuration
9. Common-mode capacitor jumper installed
10. Large Frame 8 power architecture
11. Controlled motor acceleration
12. Controlled motor deceleration
13. Flexible speed control
14. Suitable for large industrial machinery

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46. Installation Considerations

Because this is a high-power drive, installation quality is extremely important.

The following areas should be considered:

Electrical Installation

The incoming electrical system must be correctly sized for the drive.

Grounding

The grounding arrangement should be designed correctly for the drive and motor system.

Motor Cable

The motor cable must be appropriately sized for the output current and installation environment.

EMC

Cable routing, shielding and grounding should be considered as part of the complete EMC design.

Cooling

The cabinet must provide sufficient airflow.

Service Clearance

Adequate space should be provided for inspection and maintenance.

Mechanical Support

The equipment weighs approximately 325 kg and therefore requires suitable structural support.

Lifting

Appropriate lifting equipment should be available during installation.

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47. Environmental Considerations

The operating environment can significantly affect drive reliability.

Important conditions include:

• Ambient temperature
• Humidity
• Dust
• Corrosive gases
• Vibration
• Altitude
• Air quality
• Cabinet ventilation

Industrial environments with significant dust or corrosive contaminants may require additional enclosure and environmental protection.

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48. Why Frame Size Matters

Frame size is not simply a physical dimension.

It also represents the drive’s power-handling architecture.

The specified product is Frame 8.

Frame 8 is used for high-power applications and therefore requires considerably more installation space and mechanical handling capacity than small drive frames.

The large frame also means that cabinet design, ventilation, cable routing and maintenance access need to be considered carefully.

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49. Mechanical Planning Table

Item	Approximate Value
Model	20G11TC750JN0NNNNN
Frame	Frame 8
Approx. height	1900 mm class
Approx. width	850 mm class
Approx. depth	425 mm class
Approx. weight	325 kg
Cooling	Forced air
Construction	Open type
Installation environment	Industrial
Cabinet requirement	Suitable enclosure
Service access	Required
Lifting requirement	Heavy-duty handling equipment

The approximate dimensions are intended for preliminary planning.

Final installation drawings should be used when fabricating the cabinet or determining mounting positions.

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50. Product Selection Checklist

Before selecting the 20G11TC750JN0NNNNN for an actual project, the following items should be confirmed.

Check Item	Requirement
Motor voltage	Compatible with 400 VAC-class drive
Motor current	Within applicable drive duty rating
Motor power	Within appropriate duty rating
Load type	Confirm variable-torque or constant-torque behavior
Starting torque	Confirm required torque
Acceleration	Confirm required acceleration time
Deceleration	Confirm stopping requirements
Braking	Evaluate because dynamic braking is not included
Motor speed	Confirm required speed range
Motor cooling	Confirm adequate cooling at reduced speed
Environment	Confirm temperature, humidity and dust
Cooling	Confirm sufficient airflow
Network	Confirm EtherNet/IP requirements
EMC	Confirm grounding and shielding arrangement
Mechanical space	Confirm Frame 8 dimensions
Weight	Confirm approximately 325 kg planning load
Maintenance access	Confirm sufficient clearance

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51. Overall Product Assessment

The 20G11TC750JN0NNNNN is a high-capacity industrial AC drive designed for large motor applications.

Its principal electrical rating is 750 A normal duty / 400 kW at the 400 VAC three-phase class.

For suitable light-duty applications, it can reach approximately 796 A / 450 kW.

For heavy-duty applications, the rating is approximately 585 A / 315 kW.

The integrated EtherNet/IP communication capability makes it appropriate for modern industrial automation systems.

The forced-air cooling arrangement is designed for high-power operation, while the EMC-filtered configuration supports installations where electromagnetic compatibility is an important consideration.

The J configuration is significant because the common-mode capacitor jumper is installed.

The product is also a physically large Frame 8 unit, with an approximate planning size of 1900 mm × 850 mm × 425 mm and an approximate weight of 325 kg.

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52. Final Technical Summary

Category	Specification
Model	20G11TC750JN0NNNNN
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product type	High-power AC variable frequency drive
Input voltage	400 VAC class
Input phase	Three phase
Light-duty current	796 A
Normal-duty current	750 A
Heavy-duty current	585 A
Light-duty power	450 kW
Normal-duty power	400 kW
Heavy-duty power	315 kW
Frame	Frame 8
Cooling	Forced air
EMC filter	Yes
CM capacitor jumper	Installed
Dynamic braking	None
Communication	Embedded EtherNet/IP
HIM	Blank / no HIM
Enclosure	Open type
Approx. height	1900 mm class
Approx. width	850 mm class
Approx. depth	425 mm class
Approx. weight	325 kg
Main applications	Pumps, fans, blowers, conveyors, mixers, compressors and large process machinery

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53. Recommended Models at a Glance

Closest PowerFlex 755 Models

Model	Normal Duty	Heavy Duty	Main Position
20G11TC460JN0NNNNN	460 A / 250 kW	385 A / 200 kW	Lower capacity
20G11TC540JN0NNNNN	540 A / 315 kW	456 A / 250 kW	Lower capacity
20G11TC567JN0NNNNN	567 A / 315 kW	472 A / 250 kW	Intermediate
20G11TC650JN0NNNNN	650 A / 355 kW	540 A / 315 kW	Closest lower option
20G11TC770JN0NNNNN	770 A / 400 kW	642 A / 355 kW	Higher-current option

Broader Same-Brand Models

Model	Series	Current Class	Approx. Power Class	Typical Use
20G11ND014AA0NNNNN	PowerFlex 755	14 A	10 HP class	Small industrial machinery
20G11ND022AA0NNNNN	PowerFlex 755	22 A	15 HP class	Pumps, fans, conveyors
20G11ND027AA0NNNNN	PowerFlex 755	27 A	20 HP class	Industrial machinery
25B-D6P0N104	PowerFlex 525	6 A class	3 HP class	Compact machinery
25B-D011N104	PowerFlex 525	11 A class	5 HP class	Small industrial equipment

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54. Conclusion

The 20G11TC750JN0NNNNN is a high-power PowerFlex 755 AC variable frequency drive intended for large three-phase industrial motors.

Its strongest characteristics are its 750 A normal-duty current rating, 400 kW normal-duty power rating, 796 A light-duty capacity, 450 kW light-duty rating, and 585 A / 315 kW heavy-duty capability.

The integrated EtherNet/IP interface makes it suitable for industrial automation systems where the drive needs to exchange commands, status information and diagnostic data with a controller.

The product’s forced-air cooling, EMC filtering and Frame 8 construction make it suitable for large industrial installations.

The J configuration, with its common-mode capacitor jumper installed, is an important specification when comparing the model with closely related configurations.

For equipment selection, the most relevant alternatives are the 20G11TC460JN0NNNNN, 20G11TC540JN0NNNNN, 20G11TC567JN0NNNNN, 20G11TC650JN0NNNNN and 20G11TC770JN0NNNNN.

Among these, the 20G11TC650JN0NNNNN is the closest lower-current alternative, while the 20G11TC770JN0NNNNN provides additional current capacity.

From an application perspective, the 20G11TC750JN0NNNNN is particularly well suited to large pumps, fans, blowers, conveyors, mixers, process machinery, material-handling equipment and other high-power motor-driven systems.

For preliminary mechanical planning, the drive can be considered a Frame 8, approximately 1900 mm × 850 mm × 425 mm unit weighing about 325 kg. Final installation dimensions, clearances, mounting positions and lifting requirements should be confirmed against the exact equipment configuration before fabrication or installation.