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Allen-Bradley 20G1ALE435AN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1ALE435AN0NNNNN is a high-power industrial AC variable frequency drive from the PowerFlex 755 series.

It is designed for large three-phase AC motor applications where high output current, adjustable motor speed, controlled acceleration and deceleration, industrial network communication, and reliable operation are required.

This model is configured for 600 VAC, three-phase input power and uses a Frame 8 power structure. The drive has a 435 A current rating class, with published motor ratings of approximately 500 HP for Light Duty, 450 HP for Normal Duty, and 350 HP for Heavy Duty.

The model is an air-cooled PowerFlex 755 configuration with embedded EtherNet/IP, AC input with precharge, no external DC terminals, Type 1 / IP20 enclosure, and an 800 mm deep MCC-style configuration.

The catalog configuration also specifies filtered input, CM jumper removed, no dynamic braking, and a blank / no HIM arrangement.

The 20G1ALE435AN0NNNNN is therefore intended for large industrial equipment where a conventional small or medium-sized VFD would not provide enough output capacity.

It is particularly suitable for large pumps, fans, blowers, conveyors, compressors, process machinery, material-handling equipment, and other high-power motor-driven systems.

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2. Brand and Product Series

Parameter	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Model	20G1ALE435AN0NNNNN
Product Type	Industrial AC Variable Frequency Drive
Drive Category	High-Power AC Drive
Voltage Class	600 VAC
Input Phase	Three Phase
Frame	Frame 8
Cooling	Forced Air
Communication	Embedded EtherNet/IP
Enclosure	Type 1 / IP20
Cabinet Style	MCC Style
Cabinet Depth	800 mm class
Input Type	AC Input with Precharge
External DC Terminals	None
Dynamic Braking	None
Input Filtering	Filtered
CM Jumper	Removed
HIM	Blank / No HIM
Main Application	Large Industrial AC Motors

The PowerFlex 755 series is designed for high-performance industrial motor control.

Unlike a basic variable-speed drive intended primarily for simple speed adjustment, the PowerFlex 755 platform is suited to larger machines where motor speed, torque, acceleration, communication, diagnostics, and process coordination are all important.

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3. Main Technical Specifications

Parameter	Specification
Model	20G1ALE435AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	AC Variable Frequency Drive
Input Voltage	600 VAC
Input Phase	3 Phase
Frame Size	Frame 8
Current Class	435 A
Light Duty Current	435 A
Normal Duty Current	Approximately 395 A class
Heavy Duty Current	Approximately 329 A class
Light Duty Motor Rating	500 HP
Normal Duty Motor Rating	450 HP
Heavy Duty Motor Rating	350 HP
Cooling	Forced Air
Enclosure	Type 1 / IP20
Cabinet Style	800 mm Deep MCC Style
Communication	Embedded EtherNet/IP
Input Configuration	AC Input with Precharge
External DC Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Removed
HIM	Blank / No HIM
Main Application	Large industrial motor control
Typical Loads	Pumps, fans, conveyors, compressors, process machinery

The published product description identifies the 20G1ALE435AN0NNNNN as a 435 A, 600 VAC, three-phase, Frame 8 PowerFlex 755 drive, with 500 HP LD, 450 HP ND, and 350 HP HD ratings.

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4. Duty Ratings

The drive provides different operating ratings depending on the load profile.

Duty Rating	Current Class	Approx. Motor Rating	Typical Load Type
Light Duty	435 A	500 HP	Variable-torque and moderate overload applications
Normal Duty	395 A class	450 HP	General industrial loads
Heavy Duty	329 A class	350 HP	Higher-torque and demanding loads

The duty rating is important because a motor drive is not selected by horsepower alone.

The motor’s full-load current, starting requirements, load torque, acceleration time, operating cycle, ambient temperature, and overload requirements should all be considered.

A 500 HP motor application, for example, should not automatically be assumed to be suitable simply because the drive carries a 500 HP Light Duty rating.

The motor nameplate current and actual load characteristics remain important selection criteria.

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5. Light Duty Operation

The Light Duty rating is the highest continuous-current operating level for this configuration.

The drive is rated at approximately:

435 A Light Duty

with an associated motor rating of approximately:

500 HP

Light Duty applications generally have more moderate overload requirements.

Typical examples include:

• Large centrifugal pumps
• Large fans
• Large blowers
• Cooling equipment
• Certain process pumps
• Variable-torque machinery

These applications often have smoother torque characteristics than heavily loaded mechanical systems.

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6. Normal Duty Operation

The Normal Duty rating provides approximately:

450 HP motor capacity

with a lower continuous current rating than the Light Duty mode.

This operating range can be suitable for general industrial equipment where the load is more substantial than a simple variable-torque application but does not require the highest Heavy Duty overload characteristics.

Typical applications may include:

• General conveyors
• Industrial pumps
• Process machinery
• Material handling
• Large ventilation equipment
• Production machinery

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7. Heavy Duty Operation

The Heavy Duty rating is approximately:

350 HP

with a current capacity in the 329 A class.

Heavy Duty operation is intended for applications where torque demand and overload requirements are more demanding.

Typical examples include:

• Heavy conveyors
• Material handling
• Mixers
• Process machines
• Mechanical production equipment
• Machinery with high starting torque requirements

Heavy Duty selection should always be based on the actual motor current and load profile.

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8. Input Power

The 20G1ALE435AN0NNNNN is configured for:

600 VAC, 3 Phase

The input stage includes a precharge arrangement.

Input Parameter	Specification
Input Voltage	600 VAC
Phase	Three Phase
Input Type	AC
Precharge	Included
DC Terminals	None
Input Filtering	Filtered
Voltage Class	600 VAC
Application	High-Power Industrial Motor Systems

A high-power drive requires appropriate incoming electrical equipment.

The incoming feeder, protective devices, disconnect equipment, grounding system, cable size, and short-circuit requirements should all be evaluated during installation design.

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9. Output Characteristics

The drive converts incoming fixed-frequency AC power into controlled variable-frequency AC output.

This allows the motor to operate at a controlled speed instead of running continuously at the fixed speed associated with the incoming line frequency.

Output Parameter	Specification
Output Type	Variable-Frequency AC
Motor Type	Three-Phase AC Motor
Maximum LD Current	435 A
ND Current Class	Approximately 395 A
HD Current Class	Approximately 329 A
LD Motor Rating	500 HP
ND Motor Rating	450 HP
HD Motor Rating	350 HP
Speed Control	Supported
Acceleration Control	Supported
Deceleration Control	Supported
Torque Control	Supported
Network Control	Supported

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10. Product Introduction

The 20G1ALE435AN0NNNNN is designed for large industrial motor-control applications where substantial electrical capacity is required.

The drive allows a large AC motor to operate at variable speed according to the requirements of the mechanical system or production process.

This can be particularly useful where the process does not require the motor to operate continuously at full speed.

For example, a large pump can be operated at different speeds according to water demand.

A large fan can change speed according to ventilation requirements.

A conveyor can accelerate gradually instead of applying full mechanical torque immediately.

A process machine can use different motor speeds during different production stages.

The PowerFlex 755 platform is designed to accommodate these types of industrial requirements.

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11. Main Product Functions

Variable-Speed Operation

The primary function of the drive is adjustable-speed control for three-phase AC motors.

The drive changes the frequency and voltage supplied to the motor, allowing the motor speed to be controlled.

This provides the machine with a much wider operating range than a conventional fixed-speed motor arrangement.

Controlled Acceleration

The drive can provide programmed acceleration.

This is useful for large machines with significant inertia.

Instead of immediately applying full operating speed, the motor can accelerate according to the configured acceleration profile.

Controlled Deceleration

The drive can also provide controlled deceleration.

This is particularly useful for conveyors, large fans, process equipment, and other machines where an uncontrolled stop could create mechanical or process problems.

Torque Control

The PowerFlex 755 platform supports motor-control functions suitable for applications where maintaining torque is important.

This can be useful for equipment exposed to changing loads.

Network Control

The embedded EtherNet/IP interface allows the drive to be integrated into an industrial automation network.

Commands, speed references, status information, and diagnostic information can be exchanged between the drive and the control system.

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12. Embedded EtherNet/IP Communication

The integrated EtherNet/IP interface is an important feature of the 20G1ALE435AN0NNNNN.

A typical control architecture can be arranged as:

PLC → EtherNet/IP Network → PowerFlex 755 → AC Motor → Mechanical Equipment

The drive can exchange operational information with the control system.

Network Information	Typical Function
Start Command	Starts the motor
Stop Command	Stops the motor
Speed Reference	Provides desired motor speed
Frequency Reference	Controls output frequency
Output Frequency	Reports actual frequency
Output Current	Reports motor current
Drive Status	Provides operating status
Fault Status	Reports drive faults
Alarm Status	Reports warnings
Control Word	Sends operating commands
Status Word	Returns drive status
Diagnostic Information	Supports troubleshooting

This communication capability makes the drive suitable for centralized machine control and plant automation.

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13. CM Jumper Configuration

The 20G1ALE435AN0NNNNN is specified with the CM jumper removed.

This is an important part of the complete catalog configuration.

Configuration	20G1ALE435AN0NNNNN
Input Filtering	Filtered
CM Jumper	Removed
Dynamic Braking	None
HIM	Blank / No HIM
DC Terminals	None
Input	AC with Precharge

The CM jumper configuration should be checked whenever this drive is being compared with another catalog number.

Two drives can have the same voltage, current, frame size, and horsepower rating while still having different electrical configurations.

For replacement purposes, the complete catalog number should therefore be matched rather than relying only on the 435 A rating.

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14. Product Applications

The 20G1ALE435AN0NNNNN is intended for large industrial motor applications.

Typical applications include:

• Large water pumps
• Wastewater pumps
• Cooling pumps
• Process pumps
• Large fans
• Industrial blowers
• Conveyors
• Bulk material handling
• Compressors
• Industrial ventilation
• Process machinery
• Production machinery
• Material transfer equipment
• Large mechanical drives
• Industrial automation systems

The drive is especially useful where the motor needs adjustable speed and the machine needs to exchange information with a central automation system.

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15. Pump Applications

Large pumps are a natural application for high-power variable frequency drives.

A pump motor does not necessarily need to operate at maximum speed all the time.

By adjusting motor speed, the drive can help match pump operation to the required process condition.

Typical applications include:

Pump Application	Drive Function
Water Supply Pump	Flow regulation
Booster Pump	Pressure regulation
Cooling Pump	Cooling-water circulation
Process Pump	Process flow control
Wastewater Pump	Flow and level management
Circulation Pump	Controlled circulation
Transfer Pump	Controlled liquid transfer
Industrial Pump	Variable-speed operation

The actual control system may use pressure feedback, flow feedback, level feedback, or another process signal.

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16. Fan and Blower Applications

Large fans and blowers frequently operate under changing airflow requirements.

The 20G1ALE435AN0NNNNN can adjust motor speed according to process demand.

Typical applications include:

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

Variable-speed operation can provide more flexible airflow control than fixed-speed operation combined only with mechanical dampers.

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17. Conveyor Applications

Large conveyors can require substantial starting torque.

A conveyor loaded with material may have considerable mechanical inertia.

The drive can provide a controlled acceleration profile so that the motor does not immediately jump from zero speed to full operating speed.

Typical applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk material conveyors
• Production-line conveyors
• Warehouse material handling
• Industrial transfer systems

The drive can also communicate with the larger control system so conveyor operation can be coordinated with other machinery.

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18. Compressor Applications

Large compressors can also require high motor power and controlled acceleration.

The drive can be considered for applications requiring adjustable motor speed.

Typical applications include:

• Industrial air compressors
• Process compressors
• Large mechanical compressors
• Industrial process equipment
• Large cooling-related systems

Compressor applications require careful evaluation of operating speed range, acceleration, torque, motor cooling, and process requirements.

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19. Process Machinery Applications

The drive can be used for large process machinery where motor speed directly affects production conditions.

Examples include:

• Mixers
• Agitators
• Process pumps
• Material-handling machinery
• Production machines
• Large rotating equipment
• Industrial processing systems

The ability to control motor speed allows the mechanical process to be adjusted without changing the motor or relying entirely on mechanical speed-control methods.

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20. Main Product Advantages

1. High Current Capacity

The 435 A rating places this model in the high-power range of the PowerFlex 755 family.

It is intended for large industrial motor applications rather than small machinery.

2. 600 VAC Three-Phase Operation

The 600 VAC class makes the drive suitable for large industrial motor systems designed for this voltage level.

3. 500 HP Light Duty Rating

The approximately 500 HP Light Duty rating provides substantial motor capacity for large variable-torque and similar applications.

4. Multiple Duty Ratings

The drive provides different ratings for Light Duty, Normal Duty, and Heavy Duty applications.

This allows the same drive platform to be considered for different load conditions.

5. Embedded EtherNet/IP

The integrated communication interface simplifies connection to an industrial automation network.

6. Frame 8 Construction

Frame 8 construction is intended for high-power motor-control applications.

7. Forced-Air Cooling

Forced-air cooling is suitable for managing the heat generated by high-power operation.

8. MCC-Style Installation

The 800 mm deep MCC-style configuration makes the drive suitable for centralized industrial electrical installations.

9. Industrial Diagnostics

The drive can provide operating and diagnostic information to support maintenance.

10. Wide Application Range

The drive can be applied to pumps, fans, conveyors, compressors, process machinery, and other large motor-driven systems.

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21. Physical Dimensions and Weight

The model belongs to the large Frame 8 / 800 mm deep MCC-style configuration.

The available product description identifies the unit as Type 1 / IP20, 800 mm Deep MCC Style.

Because large Frame 8 drives can be installed in different cabinet arrangements, the final overall dimensions can vary with the complete installation configuration.

For planning purposes, the following values should be treated as approximate engineering references, not as a substitute for the final mechanical drawing.

Physical Parameter	Approximate Specification
Model	20G1ALE435AN0NNNNN
Frame	Frame 8
Enclosure	Type 1 / IP20
Cabinet Style	MCC Style
Cabinet Depth	Approximately 800 mm
Overall Height	Approximately 2,400–2,500 mm class
Overall Width	Approximately 600 mm class
Approx. Envelope	Approximately 2,450 × 600 × 800 mm class
Approx. Weight	Approximately 85–100 kg class
Cooling	Forced Air
Installation	Vertical industrial cabinet / MCC
Service Access	Required
Final Mechanical Data	Verify from exact configured mechanical drawing

The 85–100 kg value is provided as a planning range rather than a certified shipping weight.

For transportation, lifting, cabinet design, foundation loading, or purchasing documentation, the actual configured unit weight should be confirmed before final engineering.

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22. Installation Requirements

A 435 A, 600 VAC drive requires considerably more installation planning than a small compact VFD.

Important areas include:

Installation Item	Requirement
Incoming Voltage	600 VAC class
Phase	Three Phase
Grounding	Proper industrial grounding required
Input Protection	Properly selected
Motor Cable	Correct size and construction
Cabinet	Suitable industrial cabinet / MCC
Cooling	Adequate airflow
Ambient Temperature	Must remain within applicable operating limits
Network	EtherNet/IP connection as required
Service Clearance	Required
Cable Routing	Proper separation and routing
Heat Dissipation	Must be considered
Maintenance Access	Required

The Type 1 / IP20 configuration should be installed in an appropriate protected electrical environment.

It should not be treated as a weatherproof enclosure or as equipment intended for direct outdoor exposure without additional environmental protection.

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23. Cooling and Heat Dissipation

The 20G1ALE435AN0NNNNN uses forced-air cooling.

At this power level, cooling is an important part of system reliability.

Heat generation is affected by:

• Motor load
• Output current
• Switching conditions
• Ambient temperature
• Operating speed
• Drive duty cycle
• Cabinet arrangement
• Installation altitude
• Airflow
• Drive configuration

The cooling system needs sufficient airflow through the drive.

Hot exhaust air should not be allowed to recirculate into the drive cooling inlet.

Cooling fans, filters, and ventilation paths should also be included in the maintenance schedule.

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24. Enclosure Characteristics

Parameter	Specification
Enclosure Type	Type 1
IP Classification	IP20
Installation Environment	Controlled Industrial Electrical Environment
Outdoor Exposure	Additional enclosure required
Water Spray	Additional protection required
Dust Exposure	Suitable cabinet/environment required
Cooling	Forced Air
Mounting	MCC / Cabinet
Service Access	Required

The Type 1 / IP20 configuration is primarily intended for protected electrical installations.

The actual enclosure used in the final installation should be selected according to the surrounding environment.

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25. Maintenance Considerations

A high-power variable frequency drive should be included in a planned maintenance program.

Regular inspection can include:

• Cooling fans
• Air filters
• Ventilation openings
• Electrical terminals
• Power connections
• Ground connections
• Control wiring
• Network connections
• Motor cables
• Drive fault history
• Alarm history
• Cabinet cleanliness

Dust accumulation can reduce cooling performance.

Loose power connections can create unwanted heating.

Network problems can affect control performance.

For this reason, preventive maintenance is an important part of operating a large drive system.

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26. EtherNet/IP Integration Advantages

The integrated communication interface allows the drive to become part of a complete automation system.

A typical architecture can be represented as:

Operator HMI → PLC → Industrial Ethernet → PowerFlex 755 → Motor → Machine

The PLC can send:

• Start commands
• Stop commands
• Speed references
• Operating commands
• Reset commands

The drive can return:

• Running status
• Output speed
• Output frequency
• Motor current
• Fault status
• Alarm status
• Diagnostic information

This can make the drive easier to integrate into centralized industrial control.

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27. Advantages in Large Industrial Systems

The 20G1ALE435AN0NNNNN is particularly useful where multiple large motors need to be integrated into a coordinated control system.

For example, a production plant may have:

• Several large pumps
• Multiple ventilation fans
• Material conveyors
• Process compressors
• Cooling systems
• Production machinery

The drives can be incorporated into the plant automation system.

This allows motor operation to become part of the overall production strategy rather than remaining an isolated electrical function.

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28. Recommended Same-Series or Related Models

The following models are useful comparison points within the same high-power PowerFlex 755 family.

Model	Series	Voltage	Current Class	LD Motor Rating	ND Motor Rating	HD Motor Rating
20G1ALE355AN0NNNNN	PowerFlex 755	600 VAC	355 A	400 HP	350 HP	300 HP
20G1ALE395AN0NNNNN	PowerFlex 755	600 VAC	395 A	450 HP	400 HP	350 HP
20G1ALE435AN0NNNNN	PowerFlex 755	600 VAC	435 A	500 HP	450 HP	350 HP
20G1ALE460AN0NNNNN	PowerFlex 755	600 VAC	460 A	500 HP	500 HP	400 HP
20G1ALE510AN0NNNNN	PowerFlex 755	600 VAC	510 A class	Higher-power class	Higher-power class	Higher-power class

The 435 A model is positioned above the 395 A class and below the larger 460 A and 510 A classes.

The neighboring 435 A and 460 A catalog families are identified as PowerFlex 755, 600 VAC, three-phase, Frame 8 configurations.

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29. Same-Series Comparison

Parameter	20G1ALE355AN0NNNNN	20G1ALE395AN0NNNNN	20G1ALE435AN0NNNNN	20G1ALE460AN0NNNNN	20G1ALE510AN0NNNNN
Series	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage	600 VAC	600 VAC	600 VAC	600 VAC	600 VAC
Current Class	355 A	395 A	435 A	460 A	510 A class
Frame	8	8	8	8	8 class
LD	400 HP	450 HP	500 HP	500 HP	Higher-power
ND	350 HP	400 HP	450 HP	500 HP	Higher-power
HD	300 HP	350 HP	350 HP	400 HP	Higher-power
Cooling	Forced Air	Forced Air	Forced Air	Forced Air	Forced Air
Communication	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP
Main Use	Pumps / Fans	Large Pumps	Large Industrial Loads	Heavy Industrial Loads	Very Large Loads

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30. Five Same-Brand Popular Reference Models

For a broader Allen-Bradley comparison, the following PowerFlex models provide useful reference points.

Model	Product Series	Voltage Class	Capacity	Typical Application
20G1ALE355AN0NNNNN	PowerFlex 755	600 VAC	355 A class	Pumps, fans, conveyors
20G1ALE395AN0NNNNN	PowerFlex 755	600 VAC	395 A	Large industrial motors
20G1ALE435AN0NNNNN	PowerFlex 755	600 VAC	435 A	Process machinery
20G1ALE460AN0NNNNN	PowerFlex 755	600 VAC	460 A	Large pumps, compressors
20G1ALE295AN0NNNNN	PowerFlex 755	600 VAC	295 A class	Large motor applications

These models belong to the same broad high-power PowerFlex 755 product family and are useful for comparing different current capacities.

The exact suffix should always be checked when purchasing, because the suffix can identify differences in configuration and options.

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31. Application Selection Guide

Application	Suitable Reference Model	Main Requirement
Large Centrifugal Pump	20G1ALE435AN0NNNNN	High current and variable speed
Large Industrial Fan	20G1ALE395AN0NNNNN	Variable airflow
Heavy Conveyor	20G1ALE435AN0NNNNN	Controlled acceleration and torque
Very Large Pump	20G1ALE460AN0NNNNN	Higher current capacity
Process Machinery	20G1ALE435AN0NNNNN	Speed and torque control
Large Compressor	20G1ALE460AN0NNNNN	High motor capacity
General Industrial Motor	20G1ALE435AN0NNNNN	High-power variable-speed operation

These are application reference points rather than automatic replacement recommendations.

Final selection should be based on the motor nameplate and actual mechanical load.

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32. Comparison with the 395 A Model

The 20G1ALE435AN0NNNNN is the next larger current class compared with the 20G1ALE395AN0NNNNN.

Parameter	20G1ALE395AN0NNNNN	20G1ALE435AN0NNNNN
Voltage	600 VAC	600 VAC
Phase	3 Phase	3 Phase
Frame	8	8
Current Class	395 A	435 A
LD Motor Rating	450 HP	500 HP
ND Motor Rating	400 HP	450 HP
HD Motor Rating	350 HP	350 HP
Cooling	Forced Air	Forced Air
Enclosure	Type 1 / IP20	Type 1 / IP20
Cabinet Depth	800 mm class	800 mm class
EtherNet/IP	Embedded	Embedded
Dynamic Braking	None	None
Input	AC with Precharge	AC with Precharge

The main practical difference is the additional current capacity and higher Light Duty / Normal Duty motor rating of the 435 A class.

The Heavy Duty motor rating remains approximately 350 HP in the listed configuration.

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33. Comparison with the 460 A Model

The 460 A model provides another step upward in current capacity.

Parameter	20G1ALE435AN0NNNNN	20G1ALE460AN0NNNNN
Voltage	600 VAC	600 VAC
Frame	8	8
Current Class	435 A	460 A
LD Motor Rating	500 HP	500 HP
ND Motor Rating	450 HP	500 HP
HD Motor Rating	350 HP	400 HP
Cooling	Forced Air	Forced Air
EtherNet/IP	Embedded	Embedded
Enclosure	Type 1 / IP20	Type 1 / IP20
Cabinet Style	MCC	MCC

The 460 A configuration can provide additional capacity for Normal Duty and Heavy Duty applications.

The 435 A model may therefore be useful where the motor current falls within its range without requiring the next larger current class.

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34. Electrical Advantages

The 600 VAC configuration is well suited to large industrial motor systems.

At high motor power levels, higher motor voltage can allow the same mechanical power to be transmitted at a lower current compared with a lower-voltage motor system.

This is one reason 600 VAC class motor systems are useful for large industrial machinery.

The 20G1ALE435AN0NNNNN therefore fits applications where both motor power and electrical distribution capacity are substantial.

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35. Mechanical Advantages

The MCC-style configuration is suitable for centralized electrical installations.

The approximately 800 mm cabinet depth is an important planning factor.

When designing an electrical room, sufficient space should be provided for:

• Incoming power cables
• Motor cables
• Control wiring
• Network cables
• Cooling airflow
• Maintenance access
• Component replacement
• Door and cabinet access
• Service operations

The physical layout should be considered before ordering the final cabinet arrangement.

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36. Control Advantages

The PowerFlex 755 platform provides considerably more than simple frequency adjustment.

It can provide coordinated motor control for a complete industrial process.

Typical functions include:

• Start / stop
• Speed control
• Acceleration
• Deceleration
• Torque control
• Fault monitoring
• Alarm monitoring
• Network communication
• Diagnostic information
• Operating status

This makes it suitable for automation systems where the motor is an important part of the overall process.

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37. Maintenance Advantages

Networked drive information can make maintenance work more efficient.

Maintenance personnel can potentially monitor:

• Motor current
• Output frequency
• Speed reference
• Drive status
• Fault status
• Warning conditions
• Operating state
• Network communication status

This information can help determine whether a problem is related to the motor, mechanical equipment, drive, control system, or communication network.

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38. Replacement Checklist

When replacing an existing 20G1ALE435AN0NNNNN, the following parameters should be checked.

Replacement Parameter	Original Configuration
Model	20G1ALE435AN0NNNNN
Voltage	600 VAC
Phase	Three Phase
Current	435 A class
LD Rating	500 HP
ND Rating	450 HP
HD Rating	350 HP
Frame	8
Cooling	Forced Air
Enclosure	Type 1 / IP20
Cabinet Depth	800 mm class
Communication	Embedded EtherNet/IP
Input	AC with Precharge
DC Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Removed
HIM	None
Physical Dimensions	Verify final configuration
Weight	Verify final configuration

The complete catalog number should be matched before ordering.

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39. Motor Selection Considerations

The motor should be evaluated using its actual nameplate data.

Motor Parameter	Importance
Rated Voltage	Must match drive application
Full-Load Current	Critical
Horsepower	Important
Rated Frequency	Important
Rated Speed	Important
Service Factor	Consider
Starting Torque	Important
Running Torque	Important
Load Inertia	Important
Acceleration Time	Important
Deceleration Time	Important
Motor Insulation	Important
Motor Cable Length	Important

For a 435 A high-power drive, motor current is particularly important.

A motor with a nominal 500 HP rating should not be connected simply because the drive is marked 500 HP LD.

The actual motor current and duty conditions should be checked.

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40. Typical Industrial Equipment

Equipment	Application
Large Water Pump	Water transfer
Wastewater Pump	Wastewater handling
Cooling Pump	Cooling circulation
Large Fan	Ventilation
Industrial Blower	Process air
Conveyor	Material handling
Compressor	Industrial compression
Mixer	Process mixing
Production Machine	Variable-speed production
Process Equipment	Speed and torque control
Bulk Material System	Material transfer
Large Mechanical Drive	Industrial machinery

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41. Product Advantages Summary

Feature	Advantage
435 A Current Class	Suitable for large motor applications
600 VAC	Suitable for high-power industrial systems
500 HP LD	High Light Duty motor capacity
450 HP ND	High Normal Duty motor capacity
350 HP HD	Heavy-duty motor capability
Frame 8	High-power drive construction
EtherNet/IP	Networked automation
Forced Air	High-power cooling
MCC Style	Centralized industrial installation
AC Precharge	Controlled DC bus charging
Filtered	Integrated filtered configuration
CM Jumper Removed	Defined electrical configuration
No HIM	Suitable for remote/networked control
Diagnostics	Useful for maintenance
Variable Speed	Flexible process operation

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42. Quick Technical Reference

Parameter	Specification
Model	20G1ALE435AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	High-Power AC Variable Frequency Drive
Input Voltage	600 VAC
Input Phase	3 Phase
Frame	Frame 8
LD Current	435 A
ND Current	Approximately 395 A class
HD Current	Approximately 329 A class
LD Motor Rating	500 HP
ND Motor Rating	450 HP
HD Motor Rating	350 HP
Cooling	Forced Air
Enclosure	Type 1 / IP20
Cabinet Style	MCC Style
Cabinet Depth	800 mm
Communication	Embedded EtherNet/IP
Input	AC with Precharge
External DC Terminals	None
Dynamic Braking	None
Filtering	Filtered
CM Jumper	Removed
HIM	Blank / No HIM
Approx. Dimensions	2450 × 600 × 800 mm class
Approx. Weight	85–100 kg planning range
Main Applications	Pumps, fans, conveyors, compressors, process machinery

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43. Final Product Description

The Allen-Bradley 20G1ALE435AN0NNNNN PowerFlex 755 AC Drive is a high-power industrial variable frequency drive designed for large three-phase AC motors.

The drive operates in the 600 VAC, three-phase class and uses a Frame 8 power structure.

Its principal Light Duty rating is 435 A, with an associated motor rating of approximately 500 HP.

For Normal Duty operation, the model provides approximately 450 HP, while the Heavy Duty rating is approximately 350 HP.

The drive uses forced-air cooling and an 800 mm deep MCC-style Type 1 / IP20 configuration.

Its integrated EtherNet/IP communication makes it suitable for automated industrial systems where the drive must communicate with a PLC, HMI, or other control equipment.

The configuration includes AC input with precharge, no external DC terminals, filtered input, CM jumper removed, no dynamic braking, and no HIM.

The drive is particularly suitable for large pumps, fans, blowers, conveyors, compressors, process machinery, material-handling equipment, and other industrial systems requiring controlled motor speed.

Its major advantages are the high 435 A current capacity, large motor capability, 600 VAC operation, Frame 8 construction, network communication, forced-air cooling, and broad application range.

For physical planning, the drive should be treated as a large industrial MCC-mounted unit. The 800 mm depth is an important cabinet-planning dimension.

The approximate dimensions and weight should be considered preliminary engineering values only. Final mechanical dimensions, shipping weight, lifting requirements, and cabinet dimensions should be verified against the exact configured equipment before fabrication or transportation.

The complete catalog number 20G1ALE435AN0NNNNN should be retained when purchasing or replacing the unit.

The suffix configuration is important because closely related PowerFlex 755 models can have different CM-jumper, braking, HIM, enclosure, filtering, and other configuration details.

For a large industrial automation system, this model is best viewed as a high-capacity motor-control platform rather than simply a frequency converter.

It provides the electrical capacity required by large motors while also providing the communication and control functions needed for integration into a modern industrial automation environment.