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1. Product Overview

The 20G11TC650AN0NNNNN is a high-power industrial AC variable frequency drive designed for controlling large three-phase AC motors.

It belongs to the PowerFlex 755 family and uses a large Frame 8 power section. With a normal-duty output rating of 650 A, it is intended for large industrial motor applications where high current capacity, variable-speed operation, controlled acceleration, process control and industrial network integration are required.

The drive is designed for the 380–400 VAC class, three-phase industrial power system. It provides approximately 400 kW light-duty capability, 355 kW normal-duty capability and 315 kW heavy-duty capability.

The model uses an air-cooled architecture and is supplied as an open-type drive configuration. It also incorporates EtherNet/IP communication, making it suitable for integration with industrial controllers and automated production systems.

The exact catalog configuration includes AC input with DC terminals, filtered operation, a removed common-mode capacitor jumper, no dynamic braking option, and a blank/no-HIM configuration.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product type	Industrial AC Variable Frequency Drive
Drive category	High-power AC drive
Frame size	Frame 8
Cooling	Air cooled / forced air
Input type	AC input with DC terminals
Input phase	Three phase
Voltage class	380–400 VAC
Communication	Embedded EtherNet/IP
Enclosure configuration	Open type
Dynamic braking	None
HIM	Blank / No HIM
CM capacitor jumper	Removed
Filtering	Filtered

The PowerFlex 755 family is intended for architecture-level motor control and is suitable for a wide range of industrial machinery.

The 20G11TC650AN0NNNNN sits toward the high-power end of the single-drive Frame 8 configurations.

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3. Basic Product Parameters

Parameter	Specification
Model	20G11TC650AN0NNNNN
Series	PowerFlex 755
Product type	AC Variable Frequency Drive
Input voltage range	360–440 VAC
Nominal voltage class	380–400 VAC
Input phase	3 phase
Output frequency	0–400 Hz class
Frame	Frame 8
Normal-duty continuous output current	650 A
Normal-duty 1-minute overload current	715 A
Normal-duty 3-second overload current	975 A
Light-duty continuous output current	750 A
Light-duty 1-minute overload current	825 A
Light-duty 3-second overload current	1125 A
Heavy-duty continuous output current	540 A
Heavy-duty 1-minute overload current	810 A
Heavy-duty 3-second overload current	975 A
Light-duty power	400 kW
Normal-duty power	355 kW
Heavy-duty power	315 kW
Cooling	Forced air
Filtering	Filtered
CM capacitor jumper	Removed
Dynamic braking	None
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Construction	Open type
Approx. dimensions	1900 × 850 × 425 mm class
Approx. weight	Configuration dependent; verify final mechanical drawing

The electrical rating data above follows the published Frame 8 selection information for the 20G11TC650 configuration.

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4. Input Voltage

The 20G11TC650AN0NNNNN is intended for a 380–400 VAC class three-phase supply.

The listed input range is approximately:

360–440 VAC

This makes the drive suitable for industrial electrical systems based around 380 V or 400 V three-phase distribution.

The incoming supply should be evaluated together with:

• Transformer rating
• Short-circuit current
• Grounding arrangement
• Input protection
• Cable size
• Harmonic requirements
• Motor cable arrangement
• Environmental conditions

The drive should be installed in accordance with the electrical requirements applicable to the complete installation.

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5. Current Rating

The most important electrical characteristic of this model is its 650 A normal-duty continuous output rating.

For normal-duty operation, the drive provides approximately:

Rating	Current
Normal-duty continuous	650 A
Normal-duty 1 minute	715 A
Normal-duty 3 seconds	975 A

This makes the drive suitable for large motors and large mechanical loads.

The overload capability is especially important during acceleration and temporary load changes.

When selecting the drive, the motor’s actual nameplate current should be compared with the appropriate duty rating.

Motor power alone should not be used as the only selection criterion.

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6. Light-Duty Rating

The light-duty rating is approximately:

750 A / 400 kW

The corresponding current ratings are approximately:

Light-Duty Rating	Current
Continuous	750 A
1 minute	825 A
3 seconds	1125 A
Power	400 kW

This rating is useful for applications with relatively moderate overload requirements.

Typical examples include centrifugal pumps and fans where the load characteristic is relatively smooth.

The actual motor and application must still be checked before applying the light-duty rating.

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7. Normal-Duty Rating

The normal-duty rating is:

650 A / 355 kW

This is one of the key specifications for the model.

Normal-Duty Rating	Value
Continuous current	650 A
1-minute current	715 A
3-second current	975 A
Motor power class	355 kW

This rating makes the drive suitable for large industrial machines where the motor operates at substantial continuous load but does not require the full heavy-duty overload profile.

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8. Heavy-Duty Rating

The heavy-duty rating is approximately:

540 A / 315 kW

Heavy-Duty Rating	Value
Continuous current	540 A
1-minute current	810 A
3-second current	975 A
Motor power class	315 kW

Heavy-duty applications can include machinery with:

• High starting torque
• High inertia
• Frequent acceleration
• Frequent load changes
• Significant mechanical resistance
• High transient torque requirements

For these applications, the motor current should remain within the heavy-duty rating.

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9. Product Introduction

The 20G11TC650AN0NNNNN can be viewed as the electronic power-control interface between an industrial electrical supply and a large AC motor.

A conventional motor connected directly to a fixed-frequency supply generally operates at a relatively fixed speed.

A variable frequency drive changes the electrical frequency and voltage supplied to the motor.

This allows the motor speed to be controlled according to the requirements of the machine.

For example, a pump does not always need to operate at maximum speed.

A conveyor may need a slow startup.

A fan may need different airflow levels at different production stages.

A mixer may require controlled acceleration to avoid excessive mechanical shock.

The drive provides the electronic control needed for these situations.

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10. Simplified Operating Principle

The basic operating process can be represented as:

Three-Phase AC Supply

↓

Input Power Section

↓

Rectifier

↓

DC Bus

↓

Inverter

↓

Variable-Frequency Three-Phase AC

↓

Industrial AC Motor

The control system determines the required motor operating condition.

The drive then regulates the output to the motor according to the programmed operating parameters.

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11. Industrial Communication

The 20G11TC650AN0NNNNN includes embedded EtherNet/IP communication.

This is particularly useful in modern automated factories.

A controller can communicate with the drive to provide commands such as:

• Start
• Stop
• Enable
• Speed reference
• Direction
• Reset
• Operating mode

The drive can return information such as:

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

This reduces the need for separate hardwired signals for every operating parameter.

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12. Main Applications

12.1 Large Pump Systems

Large industrial pumps can require hundreds of kilowatts of motor power.

The drive can regulate pump speed according to process requirements.

Typical applications include:

• Water transfer
• Industrial water circulation
• Cooling-water systems
• Process pumps
• Wastewater systems
• Large circulation pumps
• Utility pumping systems

Variable-speed operation can provide better process control than operating a pump continuously at full speed.

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13. Large Fan Applications

Large industrial fans are another suitable application.

The drive can adjust fan speed according to:

• Airflow requirement
• Pressure requirement
• Production demand
• Temperature
• Ventilation requirements

Typical applications include:

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

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14. Conveyor Applications

Large conveyors can place significant demands on a motor.

A controlled drive can gradually accelerate the conveyor rather than applying full torque instantly.

This can help reduce mechanical stress on:

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

Applications can include:

• Bulk material handling
• Mining-related material handling
• Industrial production lines
• Heavy transfer systems
• Large process conveyors

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15. Blower Applications

Large blowers can require high motor power while also benefiting from variable-speed operation.

The drive can regulate blower speed according to pressure or airflow demand.

Possible applications include:

• Industrial air systems
• Process blowers
• Furnace air systems
• Wastewater aeration
• Material-processing systems
• Industrial ventilation

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16. Compressor Applications

Large compressors can require significant motor power.

The drive can provide controlled motor acceleration and variable-speed operation where the compressor design permits variable-speed control.

The compressor manufacturer’s requirements should be considered carefully, particularly with respect to:

• Torque
• Minimum speed
• Maximum speed
• Acceleration
• Regeneration
• Motor cooling
• Load profile

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17. Mixer Applications

Large mixers can have substantial starting resistance.

The drive can provide controlled acceleration to help prevent sudden mechanical loading.

Possible applications include:

• Chemical processing
• Material mixing
• Industrial production
• Bulk processing
• Heavy process mixers

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18. Material-Handling Applications

The drive can also be used in large material-handling equipment.

Potential applications include:

• Feeders
• Rollers
• Transfer systems
• Large production machines
• Heavy material-processing equipment

The correct duty rating should be selected according to the mechanical load.

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19. Main Advantages

Advantage	Practical Benefit
650 A normal-duty rating	Suitable for very large AC motors
400 kW light-duty capability	Suitable for high-power fan and pump applications
355 kW normal-duty capability	Supports large industrial machinery
315 kW heavy-duty capability	Provides a substantial high-torque application range
Frame 8 construction	Designed for large industrial power levels
EtherNet/IP communication	Convenient automation-system integration
Variable-speed control	Allows motor speed to match process requirements
Controlled acceleration	Reduces mechanical shock
Controlled deceleration	Allows controlled stopping
Forced-air cooling	Supports high-power operation
Filtered configuration	Helps address electrical-noise requirements
Large overload capability	Useful for changing industrial loads
Flexible applications	Pumps, fans, conveyors, blowers and process equipment

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20. Energy-Saving Potential

Variable-speed control can provide significant energy benefits in suitable applications.

The largest potential is generally associated with centrifugal equipment.

For example, a centrifugal pump or fan operating continuously at maximum speed may consume considerably more power than necessary when process demand is reduced.

By reducing motor speed, the drive can allow the equipment to operate closer to actual process requirements.

Potential benefits include:

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

The actual energy savings depend on the characteristics of the pump, fan, motor and overall process.

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21. Motor Selection

The drive should be matched to the motor using the complete motor nameplate.

Motor Parameter	Importance
Rated voltage	Must match the drive output voltage class
Rated current	One of the most important selection parameters
Rated power	Must be compatible with selected duty
Rated frequency	Required for motor configuration
Rated speed	Important for speed control
Power factor	Affects motor current
Efficiency	Affects actual operating current
Service factor	Important for overload evaluation
Motor type	Affects control configuration
Starting torque	Important for heavy-duty applications
Load inertia	Important for acceleration
Required speed range	Determines operating suitability
Braking requirement	Important for high-inertia machinery

A motor should not be selected solely by comparing its kW rating with the drive’s kW rating.

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22. Cooling

The drive uses an air-cooled architecture.

Because the drive operates at hundreds of amperes, significant heat can be generated in the power electronics.

Adequate airflow is therefore important.

The installation should consider:

• Ambient temperature
• Ventilation
• Cooling-fan operation
• Airflow direction
• Dust accumulation
• Cabinet temperature
• Hot-air recirculation
• Maintenance access

Blocked airflow can result in excessive temperature and reduced reliability.

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23. Filtering and CM Jumper Configuration

The model 20G11TC650AN0NNNNN has a filtered configuration with the common-mode capacitor jumper removed.

The letter in this part of the catalog number is significant.

Configuration	CM Capacitor Jumper
20G11TC650AN0NNNNN	Removed
20G11TC650JN0NNNNN	Installed

This distinction should be considered when replacing an existing drive.

The A and J configurations have the same basic current/power family but differ in the common-mode capacitor jumper arrangement.

The correct configuration should be selected according to the electrical system and grounding requirements.

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24. Dynamic Braking

The catalog configuration specifies:

Dynamic Braking: None

This is important for machines that contain substantial rotating energy.

During deceleration, energy from the motor can return to the drive’s DC bus.

If the application requires:

• Rapid stopping
• Frequent deceleration
• High-inertia stopping
• Controlled regenerative operation

then the braking arrangement must be evaluated as part of the overall system design.

This is particularly relevant to:

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

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25. Physical Dimensions

The Frame 8 installation information gives a mounting envelope in the approximate range of:

1900 mm high × 850 mm wide × 425 mm deep

for the relevant Frame 8 configuration and associated installation arrangement.

For preliminary planning:

Mechanical Parameter	Approximate Value
Model	20G11TC650AN0NNNNN
Frame	Frame 8
Approx. height	1900 mm
Approx. width	850 mm
Approx. depth	425 mm
Installation type	Open type
Cooling	Forced air
Weight (kg)	Configuration dependent

The dimensions should be treated as installation-planning values rather than a substitute for the final mechanical drawing.

The complete installed system may require additional space for:

• Incoming cables
• Motor cables
• Control wiring
• Network cables
• Ventilation
• Maintenance
• Door or cabinet clearance
• Lifting equipment
• Power connections

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26. Weight Consideration

For a Frame 8 drive of this power level, weight is a major installation consideration.

The exact equipment weight can vary depending on the detailed mechanical configuration and whether the quoted figure refers to the base drive, assembled equipment or shipping arrangement.

Therefore, for purchasing and mechanical engineering, the final equipment drawing should be used for the exact weight.

For preliminary handling calculations, the equipment should be treated as a heavy industrial assembly, not as a compact VFD.

This is particularly important when planning:

• Transportation
• Floor loading
• Lifting
• Cabinet mounting
• Maintenance
• Replacement
• Warehouse handling

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27. Installation Space

The installation area should provide more space than the physical body of the drive alone.

A suitable installation arrangement should allow personnel to access:

• Power terminals
• Control terminals
• Communication connections
• Cooling components
• Protective devices
• Internal components
• Maintenance areas

The equipment should also have adequate ventilation.

A high-power drive should not be installed in a location where hot exhaust air can immediately return into the cooling inlet.

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28. Typical Control Structure

A typical system can be organized as:

Main AC Power

↓

Protection / Disconnect

↓

20G11TC650AN0NNNNN

↓

Large Three-Phase AC Motor

↓

Pump / Fan / Conveyor / Blower / Process Machine

The automation side can be:

PLC / Industrial Controller

↓

EtherNet/IP

↓

Drive

↓

Motor

This structure allows motor control and drive status to become part of the wider production-control system.

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29. Maintenance Recommendations

Maintenance Item	Recommended Attention
Cooling fans	Check operation and unusual noise
Air passages	Keep clean and unobstructed
Cabinet ventilation	Verify adequate airflow
Power terminals	Inspect according to maintenance procedures
Grounding	Check connection integrity
Motor cables	Inspect condition and terminals
Network cables	Check connections
Drive temperature	Monitor abnormal temperature
Fault history	Check for repeated faults
Cabinet cleanliness	Prevent excessive dust
Mechanical mounting	Check for looseness
Environment	Monitor temperature and humidity

A large industrial drive should be maintained as part of a preventive-maintenance program.

Repeated faults should be investigated instead of simply being reset continuously.

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30. Typical Troubleshooting

Problem	Possible Areas to Check
Motor does not start	Enable, start command, fault status
Overcurrent	Motor load, acceleration, motor data
Overload	Motor current, mechanical load, duty rating
DC-bus overvoltage	Deceleration, regeneration, braking
Overtemperature	Cooling fans, airflow, ambient temperature
Communication problem	Network cable and controller configuration
Incorrect speed	Speed reference and scaling
Excessive vibration	Motor, mechanical system and control configuration
Electrical interference	Grounding, shielding and cable routing
Repeated trips	Mechanical and electrical conditions

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31. Five Same-Series or Closely Related Models

The following five models are particularly relevant when selecting another high-power PowerFlex 755 configuration.

Model	Voltage Class	Light Duty	Normal Duty	Heavy Duty	Frame	Main Difference
20G11TC460AN0NNNNN	380–400 VAC	315 kW	250 kW	200 kW	8	Lower current
20G11TC540AN0NNNNN	380–400 VAC	315 kW	315 kW	250 kW	8	Lower current
20G11TC567AN0NNNNN	380–400 VAC	355 kW	315 kW	250 kW	8	Lower current
20G11TC750AN0NNNNN	380–400 VAC	450 kW	400 kW	315 kW	8	Higher current
20G11TC770AN0NNNNN	380–400 VAC	450 kW	400 kW	355 kW	8	Higher current and duty capability

The current and power ratings of these configurations are part of the same 380–400 VAC Frame 8 selection range.

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32. Recommended Same-Series Model No. 1

20G11TC460AN0NNNNN

This is a lower-capacity configuration in the same high-power family.

Parameter	Specification
Model	20G11TC460AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty power	315 kW
Normal-duty power	250 kW
Heavy-duty power	200 kW
Light-duty current	540 A
Normal-duty current	460 A
Heavy-duty current	385 A
Cooling	Air cooled
Communication	EtherNet/IP
Filtering	Filtered
CM jumper	Removed
Dynamic braking	None
Approx. dimensions	Frame 8 class
Weight	Configuration dependent

This model is appropriate when the motor current requirement is significantly lower than 650 A.

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33. Recommended Same-Series Model No. 2

20G11TC540AN0NNNNN

This is another lower-capacity Frame 8 configuration.

Parameter	Specification
Model	20G11TC540AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty power	315 kW
Normal-duty power	315 kW
Heavy-duty power	250 kW
Light-duty current	585 A
Normal-duty current	540 A
Heavy-duty current	456 A
Cooling	Air cooled
Communication	EtherNet/IP
Filtering	Filtered
CM jumper	Removed
Dynamic braking	None
Approx. dimensions	Frame 8 class
Weight	Configuration dependent

This can be considered where the motor current is below the 650 A requirement.

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34. Recommended Same-Series Model No. 3

20G11TC567AN0NNNNN

This is a useful intermediate configuration.

Parameter	Specification
Model	20G11TC567AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty power	355 kW
Normal-duty power	315 kW
Heavy-duty power	250 kW
Light-duty current	612 A
Normal-duty current	567 A
Heavy-duty current	472 A
Cooling	Air cooled
Communication	EtherNet/IP
Filtering	Filtered
CM jumper	Removed
Dynamic braking	None
Approx. dimensions	Frame 8 class
Weight	Configuration dependent

This model is particularly relevant when a 567 A normal-duty rating is sufficient.

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35. Recommended Same-Series Model No. 4

20G11TC750AN0NNNNN

This is a higher-capacity configuration.

Parameter	Specification
Model	20G11TC750AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty power	450 kW
Normal-duty power	400 kW
Heavy-duty power	315 kW
Light-duty current	796 A
Normal-duty current	750 A
Heavy-duty current	585 A
Cooling	Air cooled
Communication	EtherNet/IP
Filtering	Filtered
CM jumper	Removed
Dynamic braking	None
Approx. dimensions	Frame 8 class
Weight	Configuration dependent

This is a logical choice when the motor requires more current than the 650 A model can provide.

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36. Recommended Same-Series Model No. 5

20G11TC770AN0NNNNN

This is another higher-capacity Frame 8 configuration.

Parameter	Specification
Model	20G11TC770AN0NNNNN
Series	PowerFlex 755
Voltage	380–400 VAC class
Phase	3 phase
Frame	8
Light-duty power	450 kW
Normal-duty power	400 kW
Heavy-duty power	355 kW
Light-duty current	832 A
Normal-duty current	770 A
Heavy-duty current	642 A
Cooling	Air cooled
Communication	EtherNet/IP
Filtering	Filtered
CM jumper	Removed
Dynamic braking	None
Approx. dimensions	Frame 8 class
Weight	Configuration dependent

It is suitable for applications requiring greater current and heavy-duty capability.

The above five related models are part of the same high-power 380–400 VAC selection group.

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37. Five Same-Brand Popular Models for Broader Comparison

For a broader product comparison, the following models cover smaller motor applications.

Model	Series	Voltage Class	Current Class	Approx. Motor Power	Typical Application	Frame	Approx. Weight
20G11ND014AA0NNNNN	PowerFlex 755	480 VAC	14 A	10 HP class	Small pumps, fans, conveyors	2	Approx. 8–12 kg
20G11ND022AA0NNNNN	PowerFlex 755	480 VAC	22 A	15 HP class	General machinery	2	Approx. 8–12 kg
20G11ND027AA0NNNNN	PowerFlex 755	480 VAC	27 A	20 HP class	Small industrial machines	3	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 machines	Compact	Approx. 3–4 kg

These models are not direct replacements for the 20G11TC650AN0NNNNN.

They are better regarded as broader same-brand alternatives for applications with considerably smaller motor power requirements.

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38. Comparison of the Main Models

Parameter	20G11TC650AN0NNNNN	20G11TC567AN0NNNNN	20G11TC540AN0NNNNN	20G11TC750AN0NNNNN	20G11TC770AN0NNNNN
Voltage class	380–400 V	380–400 V	380–400 V	380–400 V	380–400 V
Frame	8	8	8	8	8
Light-duty current	750 A	612 A	585 A	796 A	832 A
Normal-duty current	650 A	567 A	540 A	750 A	770 A
Heavy-duty current	540 A	472 A	456 A	585 A	642 A
Light-duty power	400 kW	355 kW	315 kW	450 kW	450 kW
Normal-duty power	355 kW	315 kW	315 kW	400 kW	400 kW
Heavy-duty power	315 kW	250 kW	250 kW	315 kW	355 kW
Cooling	Air cooled	Air cooled	Air cooled	Air cooled	Air cooled
Communication	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP
CM jumper	Removed	Removed	Removed	Removed	Removed
Dynamic braking	None	None	None	None	None

The ratings illustrate the position of the 650 A model between the lower-current 567 A configuration and the higher-current 750/770 A configurations.

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39. A-Version and J-Version Comparison

The A in the model number is important because it indicates the common-mode capacitor jumper configuration.

For comparison:

Parameter	20G11TC650AN0NNNNN	20G11TC650JN0NNNNN
Series	PowerFlex 755	PowerFlex 755
Voltage	380–400 VAC class	380–400 VAC class
Frame	8	8
Normal-duty current	650 A	650 A
Normal-duty power	355 kW	355 kW
Light-duty power	400 kW	400 kW
Heavy-duty power	315 kW	315 kW
Cooling	Air cooled	Air cooled
Filtering	Filtered	Filtered
CM capacitor jumper	Removed	Installed
Dynamic braking	None	None
Communication	EtherNet/IP	EtherNet/IP

The A and J versions therefore should not be treated as identical catalog configurations.

When replacing an existing drive, the complete model number should be matched rather than only the current rating.

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40. Product Advantages in Practical Use

High Power Capacity

With a 650 A normal-duty rating and 400 kW light-duty capability, the drive is designed for large industrial motor systems.

This makes it appropriate for machinery that is far beyond the capacity of compact machine-level VFDs.

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Flexible Duty Selection

The three duty categories provide flexibility.

A pump or fan may use the light-duty rating.

A general process machine may use the normal-duty rating.

A high-torque machine may require the heavy-duty rating.

This allows the same drive family to be selected according to the actual load profile.

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Network Integration

Embedded EtherNet/IP allows the drive to become part of a larger automation system.

This can simplify:

• Start/stop control
• Speed control
• Fault monitoring
• Status monitoring
• Production data collection
• Diagnostic communication

---

Controlled Motor Starting

Large motors can produce significant mechanical shock when started abruptly.

Variable-speed acceleration can reduce the sudden application of torque.

This can be useful for:

• Conveyors
• Pumps
• Fans
• Blowers
• Rollers
• Process machines

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Process Speed Control

Instead of operating a motor at a fixed speed, the drive allows the operating speed to follow process requirements.

This can improve production flexibility.

For example, the same machine may operate at different speeds during:

• Startup
• Normal production
• Low-demand operation
• Cleaning
• Maintenance
• Shutdown

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41. Application Selection Guide

Application	Suitability	Main Selection Concern
Large centrifugal pump	Excellent	Motor current and hydraulic load
Large centrifugal fan	Excellent	Light-duty rating and airflow
Large blower	Excellent	Torque and operating speed
Heavy conveyor	Very suitable	Starting torque and acceleration
Large mixer	Suitable	Heavy-duty overload
Compressor	Suitable with engineering review	Torque and speed range
Large roller	Suitable	Inertia and braking
Process machinery	Suitable	Load profile and communication
Water circulation	Excellent	Variable-speed operating range
Material handling	Suitable	Torque and acceleration

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42. Important Engineering Considerations

Before selecting this drive for a final installation, the following should be evaluated.

Motor Current

The motor nameplate current should be compared against the selected duty rating.

Motor Voltage

The motor voltage must be compatible with the drive’s output voltage range.

Load Type

A centrifugal pump has a different load characteristic from a conveyor or mixer.

Acceleration

Large inertia can require longer acceleration time.

Deceleration

High-inertia loads may return energy to the DC bus during deceleration.

Braking

This particular configuration does not include dynamic braking.

Ambient Conditions

Temperature and ventilation can affect drive operation.

Installation Space

Frame 8 equipment requires significant space.

Cable Installation

Large motor currents require appropriately sized power conductors and suitable installation methods.

Grounding

The grounding arrangement should be considered together with the selected common-mode capacitor configuration.

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43. Maintenance Checklist

Item	Inspection Focus
Cooling fans	Noise, rotation and airflow
Air filters/passages	Dust and blockage
Power connections	Tightness and condition
Motor cables	Insulation and terminals
Grounding	Integrity
Network	Communication stability
Drive temperature	Abnormal heating
Fault history	Repeated faults
Cabinet	Cleanliness and ventilation
Mechanical mounting	Structural condition
Environment	Temperature, humidity and dust

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44. Product Selection Summary

The 20G11TC650AN0NNNNN is best suited to large industrial motor applications where the motor requires a substantial current capacity.

Its key rating can be summarized as follows:

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

The model is therefore positioned between the lower-current 20G11TC567 configuration and the higher-current 20G11TC750 / 20G11TC770 configurations.

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45. Final Technical Summary

Category	Specification
Model	20G11TC650AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	High-power AC variable frequency drive
Input voltage	360–440 VAC
Nominal voltage	380–400 VAC
Input phase	3 phase
Frame	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
Light-duty overload	825 A / 1 min; 1125 A / 3 sec
Normal-duty overload	715 A / 1 min; 975 A / 3 sec
Heavy-duty overload	810 A / 1 min; 975 A / 3 sec
Cooling	Forced air
Input configuration	AC input with DC terminals
Filtering	Filtered
CM capacitor jumper	Removed
Dynamic braking	None
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Construction	Open type
Approx. height	1900 mm
Approx. width	850 mm
Approx. depth	425 mm
Weight (kg)	Configuration dependent
Main applications	Pumps, fans, conveyors, blowers, mixers, compressors and process machinery

The electrical ratings and Frame 8 installation dimensions above are based on the published configuration data for the 20G11TC650 drive family.

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46. Overall Assessment

The 20G11TC650AN0NNNNN is a high-capacity industrial variable frequency drive intended for large three-phase AC motors.

Its main strength is the combination of a 650 A normal-duty current rating, 400 kW light-duty capability, 355 kW normal-duty capability, and 315 kW heavy-duty capability.

The Frame 8 architecture places it firmly in the large industrial equipment category.

It is particularly appropriate for large pumps, fans, blowers, conveyors and other process machines where variable-speed operation and high motor current are required.

The embedded EtherNet/IP capability also makes it suitable for automated production systems where the drive must exchange operating commands, status information and diagnostic information with the control system.

The A configuration is an important part of the product specification because the common-mode capacitor jumper is removed. A corresponding J configuration has the jumper installed. This distinction should be retained when specifying a replacement.

For preliminary mechanical planning, approximately 1900 mm × 850 mm × 425 mm can be considered for the Frame 8 installation envelope. However, the exact final dimensions and equipment weight should be taken from the mechanical drawing for the particular configuration rather than estimated from the electrical rating alone.

From a selection standpoint, the most relevant alternatives are 20G11TC460AN0NNNNN, 20G11TC540AN0NNNNN, 20G11TC567AN0NNNNN, 20G11TC750AN0NNNNN, and 20G11TC770AN0NNNNN.

Among these, the 567 A model is the closest lower-capacity option, while the 750 A and 770 A models provide additional current and power capacity.

For final engineering selection, the most important factors remain the motor’s rated current, voltage, duty cycle, overload requirement, load torque, acceleration, deceleration, inertia, braking requirement, ambient conditions, ventilation, grounding arrangement and required communication architecture.