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1. Product Overview

The 20G11TC750AN0NNNNN is a high-power industrial AC variable frequency drive designed for controlling large three-phase AC motors.

It is a member of the PowerFlex 755 series and uses a Frame 8 high-power construction. The drive is intended for demanding industrial installations where large motors need controlled starting, acceleration, deceleration, speed regulation and process control.

The unit has a nominal 400 VAC class, three-phase input and a 750 A normal-duty continuous output rating.

Its principal power ratings are:

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

This makes it particularly suitable for large pumps, fans, blowers, conveyors, process machinery and other high-power motor-driven equipment.

The model is an air-cooled PowerFlex 755 AC drive, with embedded industrial network capability, filtered input configuration and no internal dynamic braking option in this catalog configuration.

The model’s A suffix configuration indicates that the common-mode capacitor jumper is removed. This is an important distinction when comparing it with the closely related 20G11TC750JN0NNNNN, where the common-mode capacitor jumper is installed.

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2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product category	AC Variable Frequency Drive
Drive type	High-power AC drive
Frame size	Frame 8
Cooling method	Air cooled
Input	AC input with precharge / DC terminals
Input phase	Three phase
Voltage class	380–400 VAC
Communication	Embedded EtherNet/IP
Filtering	EMC filter
CM capacitor configuration	Removed
Dynamic braking	None
HIM	Blank / no HIM
Construction	Open type
Application class	Industrial high-power motor control

The model is listed as a PowerFlex 755 air-cooled AC drive with embedded EtherNet/IP, 750 A output, 450 kW light-duty, 400 kW normal-duty and 315 kW heavy-duty ratings.

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3. Main Technical Parameters

Parameter	Specification
Model	20G11TC750AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	AC variable frequency drive
Input voltage class	400 VAC
Input voltage range	380–400 VAC class
Input phase	3 phase
Normal-duty continuous output current	750 A
Light-duty continuous output current	796 A
Heavy-duty continuous output current	585 A
Light-duty power	450 kW
Normal-duty power	400 kW
Heavy-duty power	315 kW
Frame	Frame 8
Cooling	Forced air / air cooled
Input configuration	AC input with precharge
DC terminals	Included in the applicable architecture
Filtering	EMC filter
Common-mode capacitor jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
HIM	Blank / no HIM
Construction	Open type
Installation	Industrial cabinet / suitable enclosure
Main motor class	Large industrial three-phase AC motors
Approx. physical envelope	Frame 8 installation class
Approx. height	About 1900 mm class
Approx. width	About 850 mm class
Approx. depth	About 425 mm class
Approx. weight	About 450 kg class
Weight for preliminary planning	Approximately 454 kg

The electrical ratings of 796 A light duty, 750 A normal duty and 585 A heavy duty are consistent with the 400 VAC Frame 8 selection data.

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4. Output Current and Power Ratings

The most important characteristic of this drive is its large output-current capacity.

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

The difference between these three ratings is important.

The drive should not simply be selected according to motor horsepower or kilowatts. The actual motor nameplate current and the mechanical load profile should also be considered.

For a pump or fan with a relatively smooth load, the light-duty rating may be appropriate.

For a general industrial motor with continuous operation, the normal-duty rating is often the more relevant reference.

For high-torque or severe-cycle machinery, the heavy-duty rating must be carefully evaluated.

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5. Product Introduction

The 20G11TC750AN0NNNNN is designed to provide variable-speed control for large AC motors.

A conventional fixed-speed motor system generally operates the motor at the frequency of the incoming power supply.

A variable frequency drive changes the electrical frequency and voltage supplied to the motor, allowing the motor speed to be controlled.

The drive can therefore control:

• Motor starting
• Motor stopping
• Acceleration
• Deceleration
• Operating speed
• Speed reference
• Motor torque
• Process response

This is particularly valuable in industrial machinery where the required motor speed changes according to production conditions.

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6. Basic Power Structure

A simplified representation of the drive system is:

Three-Phase AC Power

↓

Input Protection

↓

AC Input / Precharge Section

↓

DC Bus

↓

Inverter Power Section

↓

Variable-Frequency AC Output

↓

Large AC Motor

↓

Mechanical Load

The control section determines the required motor operating condition and controls the inverter output accordingly.

The resulting motor speed can be adjusted according to the process requirement.

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7. 400 VAC Three-Phase Design

The 20G11TC750AN0NNNNN is part of the 380–400 VAC three-phase product group.

This makes it suitable for industrial electrical systems designed around the 400 V class.

Electrical Characteristic	Value
Nominal voltage class	400 VAC
Typical supply class	380–400 VAC
Number of phases	3
Drive type	AC variable frequency drive
Output	Variable-frequency three-phase AC
Normal-duty current	750 A
Normal-duty power	400 kW

The input supply must be checked against the actual electrical system before installation.

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8. Light-Duty Rating

The light-duty rating is approximately:

796 A / 450 kW

This is the highest power rating associated with this particular catalog number.

Light-duty operation is generally more appropriate for applications where the motor load is relatively smooth and the application does not continuously require severe torque conditions.

Potential applications include:

• Large centrifugal pumps
• Large centrifugal fans
• Cooling fans
• Ventilation systems
• Large blowers
• Water circulation systems
• Process air systems

The motor’s actual current must still remain within the applicable drive rating.

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9. Normal-Duty Rating

The normal-duty rating is:

750 A / 400 kW

This is the principal rating associated with the model.

Parameter	Normal Duty
Continuous current	750 A
Power rating	400 kW
Voltage class	400 VAC
Phase	Three phase
Frame	Frame 8

This rating makes the drive suitable for very large industrial motors.

Typical equipment includes:

• Large conveyors
• Large pumps
• Large fans
• Large blowers
• Industrial process machines
• Large material-handling systems

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10. Heavy-Duty Rating

The heavy-duty rating is:

585 A / 315 kW

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

The heavy-duty rating is particularly relevant to machinery with higher starting torque, rapid load changes or more demanding mechanical operating conditions.

Examples include:

• Heavy conveyors
• Mixers
• Crushers
• Large rollers
• Material-handling machinery
• High-inertia machines

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11. Embedded EtherNet/IP

The model includes embedded EtherNet/IP communication.

This provides a convenient method for connecting the drive to an industrial automation control system.

A controller can communicate with the drive to provide commands and receive operating information.

Typical control information may include:

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

Typical monitoring information may include:

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

For large automated plants, this can reduce the amount of individual hardwired control wiring required.

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12. Pump Applications

The 20G11TC750AN0NNNNN is well suited to large pump applications when the motor current and duty cycle match the drive rating.

Possible applications include:

• Industrial water pumps
• Cooling-water pumps
• Process pumps
• Water-treatment systems
• Wastewater systems
• Large transfer pumps
• Circulation systems
• Industrial fluid systems

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

Instead of operating continuously at full speed, the pump can be operated at a lower speed when full flow is not required.

This can reduce unnecessary energy consumption in suitable systems.

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13. Fan Applications

Large centrifugal fans can be excellent applications for high-power variable frequency drives.

Possible applications include:

• Industrial ventilation
• Furnace ventilation
• Exhaust systems
• Cooling systems
• Air-handling equipment
• Process ventilation
• Large factory ventilation

The drive can change fan speed according to airflow requirements.

This allows the ventilation system to respond to actual process conditions.

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14. Blower Applications

Large industrial blowers can require several hundred kilowatts of motor power.

The 20G11TC750AN0NNNNN can provide the necessary high-current variable-speed control where the motor is properly matched.

Typical applications include:

• Wastewater aeration
• Process blowers
• Industrial air systems
• Furnace equipment
• Chemical process systems
• Material-processing equipment

The required minimum and maximum blower speed should be considered during application design.

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15. Conveyor Applications

Large conveyors can require high motor torque during startup.

Using a variable frequency drive allows the motor to accelerate in a controlled manner.

This can reduce sudden mechanical stress on:

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

Potential applications include:

• Bulk material handling
• Mining-related material systems
• Cement plants
• Manufacturing plants
• Large warehouse systems
• Industrial processing lines

For conveyors with high starting torque, the heavy-duty rating should receive particular attention.

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16. Mixer Applications

Large industrial mixers may require significant torque during startup.

The drive can provide controlled acceleration rather than applying full motor speed immediately.

Potential applications include:

• Chemical processing
• Industrial mixing
• Material processing
• Food processing equipment
• Large tank systems
• Manufacturing processes

For mixers with very high starting torque, motor current and overload requirements should be evaluated carefully.

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17. Compressor Applications

Large compressors can require substantial motor power.

The drive may be used where the compressor manufacturer permits variable-speed motor operation.

Important considerations include:

• Minimum speed
• Maximum speed
• Motor current
• Compressor torque
• Starting conditions
• Acceleration
• Deceleration
• Cooling
• Regeneration

A compressor application should not be selected solely by comparing motor kW with drive kW.

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18. Main Product Advantages

Advantage	Practical Benefit
750 A normal-duty output	Suitable for very large motors
796 A light-duty rating	Supports high-power fan and pump applications
585 A heavy-duty rating	Allows demanding applications within the heavy-duty limit
400 kW normal-duty power	Suitable for very large industrial equipment
450 kW light-duty power	Provides additional capacity for suitable variable-torque loads
PowerFlex 755 architecture	Designed for industrial automation applications
Embedded EtherNet/IP	Simplifies network integration
Air cooling	Practical for high-power industrial installations
EMC filtering	Helps manage electromagnetic compatibility requirements
Variable-speed control	Allows process speed adjustment
Controlled acceleration	Reduces mechanical shock
Large current capacity	Suitable for high-power motors
Frame 8 construction	Designed for large industrial installations

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19. A Configuration – CM Capacitor Jumper Removed

The A in the model number is an important configuration identifier.

For the PowerFlex 755 family, the catalog coding uses:

• J = common-mode capacitor jumper installed
• A = common-mode capacitor jumper removed

Therefore:

Model	CM Capacitor Jumper
20G11TC750AN0NNNNN	Removed
20G11TC750JN0NNNNN	Installed

This distinction should be considered when replacing an existing drive.

The two models have the same basic 750 A / 400 VAC power rating, but their common-mode capacitor configurations are different.

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20. EMC Filtering

The model is configured with an EMC filter.

Filtering is important in industrial electrical systems because high-power variable frequency drives can generate electrical noise associated with their switching operation.

A suitable installation should also consider:

• Motor cable routing
• Cable shielding
• Grounding
• Cabinet layout
• Separation between power and control wiring
• Motor cable length
• System grounding arrangement

The drive’s filtering configuration should be considered together with the electrical installation rather than treated as an independent feature.

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21. Dynamic Braking

The catalog configuration specifies:

Dynamic braking: None

This is an important application consideration.

When a high-inertia motor decelerates, energy can return from the motor into the drive’s DC bus.

This can cause the DC-bus voltage to increase.

For applications requiring frequent rapid deceleration, an appropriate braking solution may need to be considered separately.

Potentially demanding applications include:

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

The absence of a dynamic-braking option should therefore be considered during the initial system design.

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22. Physical Size

The 20G11TC750AN0NNNNN is a large Frame 8 industrial drive.

For preliminary engineering purposes, a physical envelope in approximately the following range can be used:

Mechanical Parameter	Approximate Value
Model	20G11TC750AN0NNNNN
Frame	Frame 8
Approx. height	1900 mm class
Approx. width	850 mm class
Approx. depth	425 mm class
Approx. weight	About 454 kg
Cooling	Forced air
Construction	Open type

These values are intended for preliminary planning rather than final mechanical fabrication.

The final dimensional drawing for the actual equipment configuration should be used before designing the cabinet, foundation or lifting arrangement.

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23. Weight and Handling

The approximate equipment weight is around:

454 kg

This is a significant mechanical load.

Installation planning should therefore consider:

• Transportation
• Forklift or lifting equipment
• Cabinet structure
• Floor loading
• Mounting hardware
• Maintenance access
• Power-cable installation
• Removal and replacement procedures

For large Frame 8 drives, handling should be planned before the equipment arrives at the installation location.

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24. Cooling Requirements

Because the drive handles several hundred amps of motor current, thermal management is important.

The air-cooling system needs adequate airflow.

The installation should prevent hot exhaust air from being drawn directly back into the cooling inlet.

Important considerations include:

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

Poor cooling can result in:

• Thermal trips
• Reduced component life
• Increased maintenance
• Reduced output capability
• Unstable operation

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25. Motor Selection

The motor should be selected using the complete nameplate information.

Motor Parameter	Why It Matters
Rated voltage	Must match the drive output range
Rated current	Critical for drive sizing
Rated power	Used together with current
Frequency	Required for motor configuration
Speed	Determines operating range
Power factor	Influences current
Efficiency	Affects system loading
Service factor	Important for load assessment
Motor type	Determines control requirements
Starting torque	Important for heavy-duty applications
Inertia	Important for acceleration/deceleration
Speed range	Determines application suitability

The motor should not be selected simply because its kW rating appears below 400 kW.

Motor current and load behavior are equally important.

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26. Energy-Saving Advantages

Variable-speed control can provide energy-saving benefits in applications where the motor does not need to operate continuously at full speed.

This is particularly relevant to:

• Pumps
• Fans
• Blowers

For example, a pump system may not require maximum flow throughout the entire production cycle.

Reducing motor speed can reduce power consumption.

Potential benefits include:

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

Actual energy savings depend on the mechanical system and operating profile.

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27. Controlled Acceleration

One major advantage of a large variable frequency drive is controlled acceleration.

Instead of immediately applying full-speed operation, the drive can increase motor speed according to a programmed acceleration profile.

This can reduce mechanical shock.

Benefits can include:

• Reduced belt stress
• Reduced gearbox shock
• Reduced coupling stress
• Reduced shaft torque shock
• Smoother material handling
• Better process stability

This is especially valuable for large machines with high inertia.

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28. Controlled Deceleration

The drive can also control motor deceleration.

The deceleration profile must be selected according to the machine’s mechanical characteristics.

A machine with high inertia may require a relatively long deceleration time.

If the machine must stop very quickly, the braking requirements need to be considered separately.

This is especially important because the specified configuration does not include dynamic braking.

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29. Typical Industrial Control System

A typical installation can be structured as:

Three-Phase 400 VAC Supply

↓

Electrical Protection

↓

20G11TC750AN0NNNNN

↓

Large AC Motor

↓

Pump / Fan / Conveyor / Blower / Process Equipment

The control system can be arranged as:

Industrial Controller

↓

EtherNet/IP

↓

PowerFlex 755 Drive

↓

AC Motor

This arrangement allows the drive to become part of the plant’s automation system.

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30. Maintenance Considerations

Maintenance Item	Recommended Inspection
Cooling fans	Check operation and abnormal noise
Air passages	Check for blockage
Cabinet ventilation	Verify adequate airflow
Power connections	Check condition and tightness
Grounding	Verify connection
Motor cables	Inspect insulation and termination
Network wiring	Check communication connections
Drive temperature	Check for abnormal heating
Fault history	Review repeated faults
Cabinet cleanliness	Remove excessive dust
Mechanical mounting	Check structural integrity
Environmental conditions	Check temperature and humidity

Large drives should receive preventive maintenance because unexpected failure can affect an entire production line.

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31. Common Troubleshooting Areas

Symptom	Possible Areas to Investigate
Motor does not start	Enable signal, start command, faults
Overcurrent	Motor load, acceleration, motor data
Overload	Motor current, mechanical load, duty rating
DC-bus overvoltage	Deceleration and regeneration
Overtemperature	Cooling, airflow, ambient temperature
Communication loss	Network cable, controller, configuration
Incorrect motor speed	Reference, scaling, programming
Excessive vibration	Motor and mechanical system
Electrical interference	Grounding, shielding and cable routing
Repeated trips	Mechanical load and operating conditions

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32. Five Closely Related Models

The following models are especially relevant because they are from the same PowerFlex 755, 400 VAC, Frame 8 high-power range.

Model	Voltage	Light Duty	Normal Duty	Heavy Duty	Frame	Relationship
20G11TC460AN0NNNNN	400 VAC	540 A / 315 kW	460 A / 250 kW	385 A / 200 kW	8	Lower capacity
20G11TC540AN0NNNNN	400 VAC	585 A / 315 kW	540 A / 315 kW	456 A / 250 kW	8	Lower capacity
20G11TC567AN0NNNNN	400 VAC	612 A / 355 kW	567 A / 315 kW	472 A / 250 kW	8	Closest lower-current model
20G11TC650AN0NNNNN	400 VAC	750 A / 400 kW	650 A / 355 kW	540 A / 315 kW	8	Lower-current alternative
20G11TC770AN0NNNNN	400 VAC	832 A / 450 kW	770 A / 400 kW	642 A / 355 kW	8	Higher-current alternative

The 400 VAC Frame 8 selection data confirms the progression from the 460 A through 770 A configurations.

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33. Related Model 1 – 20G11TC460AN0NNNNN

The 20G11TC460AN0NNNNN is a lower-capacity member of the same product group.

Parameter	Specification
Model	20G11TC460AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	Three 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	Air cooled
Filtering	EMC filter
CM jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. physical class	Frame 8
Approx. weight	Large Frame 8 class

This is a useful option when the 750 A model provides more capacity than the motor actually requires.

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34. Related Model 2 – 20G11TC540AN0NNNNN

The 20G11TC540AN0NNNNN provides a lower current rating in the same 400 VAC family.

Parameter	Specification
Model	20G11TC540AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	Three 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	Air cooled
Filtering	EMC filter
CM jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. physical class	Frame 8
Approx. weight	Large Frame 8 class

It can be considered when the motor’s current is below the 750 A requirement.

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35. Related Model 3 – 20G11TC567AN0NNNNN

The 20G11TC567AN0NNNNN is another closely related lower-current model.

Parameter	Specification
Model	20G11TC567AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	Three 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	Air cooled
Filtering	EMC filter
CM jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. physical class	Frame 8
Approx. weight	Large Frame 8 class

This model is a useful intermediate step between the smaller 540 A configuration and the larger 650 A configuration.

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36. Related Model 4 – 20G11TC650AN0NNNNN

The 20G11TC650AN0NNNNN is particularly close to the subject model.

Parameter	Specification
Model	20G11TC650AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	Three 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	Air cooled
Filtering	EMC filter
CM jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. physical class	Frame 8
Approx. weight	Large Frame 8 class

This model is the most natural lower-current alternative to the 750 A version.

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37. Related Model 5 – 20G11TC770AN0NNNNN

The 20G11TC770AN0NNNNN is the next higher-current model in the same group.

Parameter	Specification
Model	20G11TC770AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	Three 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	Air cooled
Filtering	EMC filter
CM jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
Approx. physical class	Frame 8
Approx. weight	Large Frame 8 class

This is an appropriate comparison when the motor requires slightly more current than the 750 A configuration can provide.

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38. Five Same-Brand Popular Model Recommendations

For broader selection, the following models represent commonly used smaller industrial drive configurations within the same overall product brand family.

Model	Product Series	Voltage Class	Current Class	Typical Power Class	Typical Application	Physical Class	Approx. Weight
20G11ND014AA0NNNNN	PowerFlex 755	480 VAC	14 A class	10 HP class	Pumps, fans, conveyors	Small frame	Approx. 8–12 kg
20G11ND022AA0NNNNN	PowerFlex 755	480 VAC	22 A class	15 HP class	General machinery	Small frame	Approx. 8–12 kg
20G11ND027AA0NNNNN	PowerFlex 755	480 VAC	27 A class	20 HP class	Industrial machinery	Small frame	Approx. 12–15 kg
25B-D6P0N104	PowerFlex 525	480 VAC	6 A class	3 HP class	Compact machinery	Compact	Approx. 2–3 kg
25B-D011N104	PowerFlex 525	480 VAC	11 A class	5 HP class	Small industrial equipment	Compact	Approx. 3–4 kg

These models are not direct electrical replacements for the 750 A Frame 8 drive.

They are broader same-brand recommendations for applications where the motor power is considerably smaller.

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39. Five Closest Models Compared

Parameter	20G11TC460AN0NNNNN	20G11TC540AN0NNNNN	20G11TC567AN0NNNNN	20G11TC650AN0NNNNN	20G11TC770AN0NNNNN
Voltage class	400 V	400 V	400 V	400 V	400 V
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
EtherNet/IP	Yes	Yes	Yes	Yes	Yes
EMC filter	Yes	Yes	Yes	Yes	Yes
CM jumper	Removed	Removed	Removed	Removed	Removed
Dynamic braking	None	None	None	None	None

The progression demonstrates that the 20G11TC750AN0NNNNN is positioned near the upper end of the Frame 8 400 VAC range, below the 770 A configuration.

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40. A vs. J Configuration

A particularly useful comparison is between the A and J versions.

Parameter	20G11TC750AN0NNNNN	20G11TC750JN0NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage class	400 VAC	400 VAC
Input phase	Three phase	Three phase
Frame	8	8
Normal-duty current	750 A	750 A
Light-duty power	450 kW	450 kW
Normal-duty power	400 kW	400 kW
Heavy-duty power	315 kW	315 kW
Cooling	Air cooled	Air cooled
Filtering	EMC filter	EMC filter
CM capacitor jumper	Removed	Installed
Dynamic braking	None	None
EtherNet/IP	Yes	Yes
HIM	Blank / no HIM	Blank / no HIM

The principal catalog difference is the common-mode capacitor jumper configuration.

The A version has the jumper removed, while the J version has it installed.

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41. Why Choose the 20G11TC750AN0NNNNN?

The model is particularly attractive when the application requires a combination of:

• High motor current
• High motor power
• Variable-speed control
• Industrial networking
• Large overload capability
• Air-cooled construction
• 400 VAC class operation
• Frame 8 high-power construction
• EMC filtering
• Removed common-mode capacitor jumper

The 750 A normal-duty rating gives the drive enough capacity for very large industrial motors.

At the same time, the 796 A light-duty rating makes it suitable for certain higher-power variable-torque applications.

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42. Application Selection Table

Application	Suitability	Main Reason
Large centrifugal pump	Excellent	High power and variable speed
Large centrifugal fan	Excellent	High light-duty capacity
Large blower	Excellent	High continuous current
Water circulation system	Excellent	Speed control
Industrial ventilation	Excellent	Variable airflow
Heavy conveyor	Very suitable	Controlled acceleration
Large mixer	Suitable	High current capacity
Large roller	Suitable	Large motor control
Compressor	Suitable with engineering review	Torque and speed requirements
Process machine	Suitable	Flexible speed control
Material handling	Suitable	Controlled motor acceleration
Cooling equipment	Excellent	Variable-speed operation

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43. Important Selection Considerations

Before installing the drive, the following items should be verified.

Motor Current

The motor nameplate current must be within the applicable duty rating.

Motor Voltage

The motor voltage must be compatible with the drive output.

Duty Cycle

The actual load cycle determines whether light-duty, normal-duty or heavy-duty operation is appropriate.

Starting Torque

High starting torque may require the heavy-duty rating.

Inertia

Large rotating inertia affects acceleration and deceleration.

Braking

The selected model does not contain dynamic braking in this configuration.

Ambient Temperature

The environmental temperature affects thermal performance.

Cooling

The cabinet must provide sufficient airflow.

Electrical System

The 400 VAC three-phase supply must be appropriate for the drive.

Grounding

The A configuration’s removed CM capacitor jumper should be considered as part of the overall grounding and EMC design.

Motor Cable

Motor-cable selection and installation are important for a drive of this power level.

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44. Mechanical Installation Summary

Item	Approximate Specification
Model	20G11TC750AN0NNNNN
Frame	Frame 8
Approx. height	1900 mm class
Approx. width	850 mm class
Approx. depth	425 mm class
Approx. weight	454 kg
Cooling	Forced air
Construction	Open type
Installation	Industrial cabinet / suitable enclosure
Input	Three-phase 380–400 VAC class
Normal-duty output	750 A
Normal-duty power	400 kW

Because this is a large industrial drive, the actual mechanical drawing should be used for final cabinet fabrication.

The approximate dimensions and 454 kg planning weight should not be treated as a substitute for the final equipment drawing.

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45. Maintenance and Service Advantages

The drive is designed for industrial use and can be integrated into a plant-wide maintenance strategy.

Routine maintenance can include:

• Cleaning
• Cooling-fan inspection
• Electrical connection inspection
• Grounding inspection
• Cable inspection
• Network inspection
• Temperature monitoring
• Fault-history review
• Cabinet ventilation inspection

Monitoring drive status through the industrial network can also help maintenance personnel identify abnormal conditions before they become serious production problems.

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46. Overall Advantages

The most significant advantages of the 20G11TC750AN0NNNNN can be summarized as follows:

1. Very high current capacity

The 750 A normal-duty rating makes it suitable for large industrial motors.

2. High power capability

The 400 kW normal-duty rating places it firmly in the high-power industrial drive category.

3. Flexible duty ratings

The 796 A light-duty and 585 A heavy-duty ratings allow the same drive family to address different load characteristics.

4. Industrial communication

Embedded EtherNet/IP makes integration into an automated plant relatively straightforward.

5. Variable-speed operation

Motor speed can be matched to actual process demand.

6. Controlled acceleration

Large mechanical equipment can be started more smoothly.

7. Controlled deceleration

The drive can provide programmed deceleration according to application requirements.

8. Air-cooled design

The architecture is appropriate for large industrial installations with proper ventilation.

9. EMC filtering

The filtering configuration helps address electrical-noise considerations.

10. Large Frame 8 architecture

The physical and electrical design is intended for high-power applications.

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47. Complete Technical Summary

Category	Specification
Model	20G11TC750AN0NNNNN
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product type	High-power AC variable frequency drive
Input voltage	380–400 VAC class
Input phase	3 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
Filtering	EMC filter
CM capacitor jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
HIM	Blank / no HIM
Construction	Open type
Approx. height	1900 mm class
Approx. width	850 mm class
Approx. depth	425 mm class
Approx. weight	454 kg
Main applications	Pumps, fans, blowers, conveyors, mixers, compressors and process machinery

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48. Final Product Evaluation

The 20G11TC750AN0NNNNN is a high-power industrial variable frequency drive intended for large three-phase AC motors.

Its 750 A normal-duty output rating and 400 kW normal-duty power rating make it appropriate for large industrial equipment.

For suitable variable-torque applications, the drive can operate at up to approximately 796 A light-duty / 450 kW.

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

The drive’s embedded EtherNet/IP capability allows it to participate in an industrial automation network, making it suitable for plants where drive commands, operating status and diagnostic information need to be exchanged with a controller.

The A configuration is an important detail. The common-mode capacitor jumper is removed, distinguishing this model from 20G11TC750JN0NNNNN.

From a mechanical standpoint, this is a large Frame 8 device. A preliminary planning envelope of approximately 1900 mm × 850 mm × 425 mm and a weight of approximately 454 kg can be considered when planning transportation, mounting and cabinet space. Final installation work should always be based on the exact mechanical drawing for the supplied configuration.

For direct comparison, the most relevant neighboring models are:

• 20G11TC460AN0NNNNN – lower current and power.
• 20G11TC540AN0NNNNN – lower current and power.
• 20G11TC567AN0NNNNN – intermediate lower-current option.
• 20G11TC650AN0NNNNN – closest lower-capacity alternative.
• 20G11TC770AN0NNNNN – higher-current alternative.

Overall, the 20G11TC750AN0NNNNN is best regarded as a large industrial drive for high-power motor applications where high current capacity, variable-speed control, industrial communication and controlled motor operation are required.