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1. Product Overview

The 20G1ALE355AN0NNNNN is a high-power AC variable frequency drive in the PowerFlex 755 series. It is designed for large three-phase AC motor applications where accurate speed control, controlled acceleration and deceleration, industrial networking, and dependable operation are required.

This model is a 600 VAC, three-phase, 355 A, Frame 8, air-cooled AC drive. It is configured for AC input with precharge and does not include external DC terminals. The unit uses a Type 1, IP20, 800 mm deep MCC-style arrangement and includes embedded EtherNet/IP communication. The catalog configuration specifies filtered operation with the CM jumper removed, no dynamic braking option, and a blank configuration without a standard HIM.

The 355 A rating places this model in the high-power range of the PowerFlex 755 family. Depending on the selected duty category, the drive can be applied to motors up to approximately 400 HP for light-duty applications, 350 HP for normal-duty applications, and 300 HP for heavy-duty applications.

The drive is primarily intended for industrial equipment in which a large AC motor needs more flexible control than simple direct-on-line starting can provide. Typical applications include pumps, fans, blowers, conveyors, compressors, material-handling systems, process machinery, and other large motor-driven equipment.

2. Brand and Series

Item	Description
Brand	Allen-Bradley
Product family	PowerFlex
Product series	PowerFlex 755
Product category	AC Variable Frequency Drive
Model	20G1ALE355AN0NNNNN
Drive construction	Air cooled
Voltage class	600 VAC
Phase	Three phase
Rated output current	355 A
Frame	Frame 8
Enclosure	Type 1 / IP20
Cabinet style	800 mm deep MCC style
Communication	Embedded EtherNet/IP
Input	AC input with precharge
External DC terminals	None
Dynamic braking	None
Filtering	Filtered
CM configuration	CM jumper removed
HIM	Blank / no standard HIM

The model belongs specifically to the PowerFlex 755 AC Drive range. The 355 A version is one of the larger Frame 8 configurations intended for high-power motor control.

3. Main Technical Parameters

Parameter	Specification
Model	20G1ALE355AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	High-power AC variable frequency drive
Input voltage	600 VAC
Input phase	3-phase
Output current	355 A
Light-duty output current	355 A continuous
Light-duty 1-minute current	391 A
Normal-duty output current	295 A continuous
Normal-duty 1-minute current	325 A
Normal-duty short-time current	490 A class
Heavy-duty output current	272 A continuous
Heavy-duty 1-minute current	408 A
Heavy-duty short-time current	490 A
Light-duty motor rating	400 HP
Normal-duty motor rating	350 HP
Heavy-duty motor rating	300 HP
Frame size	Frame 8
Cooling	Forced-air / air cooled
Enclosure	Type 1 / IP20
Cabinet depth	800 mm class
Cabinet arrangement	MCC style
Input configuration	AC input with precharge
External DC terminals	None
Dynamic braking	None
Filtering	Filtered
CM jumper	Removed
Communication	Embedded EtherNet/IP
HIM	Blank / no standard HIM
Typical motor	Large three-phase AC motor
Installation	Industrial floor-mounted / MCC-style installation

The duty ratings are particularly important. The 355 A figure represents the light-duty continuous output rating, while the normal-duty and heavy-duty ratings are lower because those operating modes allow for more demanding overload conditions.

4. Duty Rating Explained

The model should not be selected solely by comparing the motor horsepower with the headline 355 A rating.

The drive has different output capabilities depending on the operating duty.

Duty	Continuous current	Short-time capability	Motor rating
Light Duty	355 A	391 A / applicable overload profile	400 HP
Normal Duty	295 A	Up to approximately 490 A class	350 HP
Heavy Duty	272 A	Up to approximately 490 A class	300 HP

Light-duty applications generally have less demanding overload requirements. Typical examples can include certain centrifugal pump and fan applications.

Normal-duty applications require greater overload capability and are common in many general industrial motor applications.

Heavy-duty applications can involve higher starting torque, repeated acceleration, shock loading, or other demanding mechanical conditions. Conveyors, mixers and certain process machines can require this type of evaluation.

The actual motor nameplate current and load profile should always be considered when selecting the drive.

5. Product Description

The 20G1ALE355AN0NNNNN is designed to control the speed and operating characteristics of a large three-phase AC motor.

A conventional fixed-speed motor connected directly to an AC supply generally operates at a speed determined by the supply frequency and motor characteristics.

A variable frequency drive provides another method of operation.

The drive controls the electrical power delivered to the motor so that the motor can operate at different speeds according to the requirements of the machine.

This makes it possible to coordinate motor speed with the actual production process.

For example, a large pump does not necessarily need to operate at maximum speed all the time. A fan may require different airflow levels during different production stages. A conveyor may need a controlled ramp from zero speed to its production speed.

The drive can provide the motor-control platform needed for these applications.

6. Variable-Speed Control

One of the main functions of the product is variable-speed motor control.

The drive can provide a controlled speed reference rather than simply switching the motor between running and stopped states.

This is particularly useful when a process requires:

• Low-speed operation
• Medium-speed operation
• High-speed operation
• Variable production rates
• Controlled acceleration
• Controlled deceleration
• Process-based speed adjustment

The actual operating speed range depends on the motor, load, control mode, mechanical system, and application requirements.

7. Controlled Acceleration

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

With a variable frequency drive, the motor can be accelerated according to a programmed acceleration profile.

Instead of applying full operating conditions immediately, the drive can progressively increase motor speed.

This can be useful for:

• Large conveyors
• Pumps
• Fans
• Blowers
• Compressors
• Material-handling equipment
• Process machinery

Controlled acceleration can also help reduce mechanical shock to couplings, gearboxes, shafts, belts, chains and other connected equipment.

8. Controlled Deceleration

The drive can also manage motor deceleration.

This is useful when the driven machine should not stop abruptly.

A controlled deceleration profile can be particularly useful for conveyors, rotating machinery and process equipment where a sudden stop could create mechanical or process problems.

The exact stopping method should be selected according to the mechanical system and whether the application requires regenerative or dynamic braking.

9. EtherNet/IP Integration

The 20G1ALE355AN0NNNNN includes embedded EtherNet/IP capability.

This allows the drive to participate in an industrial automation network.

A typical control architecture can be represented as:

Controller → Industrial Ethernet Network → PowerFlex 755 Drive → AC Motor → Mechanical Equipment

Depending on the control system, information exchanged with the drive can include:

• Start command
• Stop command
• Speed reference
• Actual speed
• Output current
• Drive status
• Fault status
• Alarm information
• Operating condition
• Diagnostic information

This makes the drive suitable for applications where the motor controller must be integrated into a larger automated production system.

10. Typical Applications

Application	Typical purpose
Large water pumps	Flow and pressure control
Wastewater pumps	Variable pumping capacity
Industrial fans	Airflow adjustment
Large blowers	Process-air control
Compressors	Variable-speed operation
Belt conveyors	Controlled acceleration and speed
Material-handling systems	Controlled movement
Mixers	Variable-speed processing
Process machinery	Production-speed adjustment
Industrial ventilation	Air volume control
Water-treatment systems	Pump and blower control
Manufacturing lines	Large motor control
Mining equipment	High-power motor applications
Aggregate equipment	Large motor-driven machinery
Cement equipment	Process motor control

The 355 A rating makes this model particularly suitable for applications where the motor is substantially larger than those normally handled by compact VFDs.

11. Pump Applications

Large pump systems are one of the practical application areas for a high-power variable frequency drive.

A pump may operate at different flow requirements throughout the day.

For example:

Low demand → lower motor speed

Medium demand → medium motor speed

High demand → higher motor speed

This provides greater process flexibility than simply turning a fixed-speed motor fully on or fully off.

The actual energy performance depends on pump design, system pressure, piping characteristics, operating schedule, control method, and other factors.

12. Fan and Blower Applications

Fans and blowers often have variable airflow requirements.

A production facility may require high airflow during one stage of operation and substantially less airflow during another.

Variable-speed operation allows the motor speed to be adjusted according to the process.

Typical applications include:

• Industrial ventilation
• Process-air systems
• Dust collection
• Cooling systems
• Air-handling systems
• Large exhaust systems
• Industrial blowers

13. Conveyor Applications

Large conveyor systems can benefit from controlled acceleration and deceleration.

A sudden start on a large conveyor can place substantial stress on:

• Belts
• Gearboxes
• Couplings
• Shafts
• Rollers
• Bearings
• Mechanical structures

A variable frequency drive can provide a controlled acceleration profile.

The conveyor can also operate at different speeds when the production process requires different material-flow rates.

14. Compressor Applications

Large compressors can require carefully controlled motor operation.

The drive can be used where variable-speed operation is compatible with the compressor design.

Potential functions include:

• Controlled starting
• Variable operating speed
• Process coordination
• Motor protection
• Network monitoring
• Automated start/stop control

The compressor manufacturer’s requirements should be considered when determining the appropriate control method and drive rating.

15. Main Advantages

15.1 High Current Capacity

The 355 A output class allows the drive to control large industrial motors.

The published motor ratings reach approximately 400 HP for light duty, 350 HP for normal duty and 300 HP for heavy duty.

15.2 Large-Motor Speed Control

The product is designed for applications where motor speed needs to be actively controlled.

This makes it useful for machines whose production requirements change during operation.

15.3 Controlled Starting

The drive can provide a gradual acceleration profile, reducing the need for an abrupt full-speed start.

15.4 Controlled Stopping

The drive can manage deceleration according to the programmed operating requirements.

15.5 Industrial Network Capability

Embedded EtherNet/IP makes the drive suitable for integration into an industrial automation network.

15.6 Large-Scale Industrial Applications

The 355 A configuration is intended for substantial industrial motor loads and can be used in large pumping, ventilation, material-handling and process systems.

15.7 MCC-Style Construction

The 800 mm deep MCC-style configuration is suited to centralized industrial electrical installations.

This type of installation is useful where large motor-control equipment is grouped into a dedicated electrical or motor-control area.

15.8 Flexible Duty Selection

The different light-duty, normal-duty and heavy-duty ratings allow the same general drive platform to address different load characteristics.

15.9 Practical Industrial Integration

The combination of high current capacity, networking, industrial enclosure construction and configurable motor control makes the product suitable for larger automation projects.

16. Physical Dimensions and Weight

The exact mechanical dimensions and shipping weight can vary according to the complete factory configuration and packaging arrangement.

For preliminary equipment planning, the model should be treated as a large Frame 8 MCC-style unit rather than a small wall-mounted drive.

Mechanical parameter	Approximate / applicable specification
Model	20G1ALE355AN0NNNNN
Frame	Frame 8
Cabinet style	MCC style
Cabinet depth	800 mm
Approx. height	Approximately 2,450 mm class
Approx. width	Approximately 600 mm class
Approx. depth	Approximately 800 mm
Approx. weight	Approximately 500–600 kg class
Cooling	Forced air
Installation	Floor-mounted / MCC-style
Access	Front/service access required
Transportation	Heavy equipment handling

The 800 mm depth is part of the catalog description for this configuration.

The height, width and weight shown above are intended as preliminary planning values. They should not be used as final foundation, lifting, transportation or cabinet-fabrication specifications without checking the exact mechanical drawing for the supplied unit.

This point is particularly important because a unit of this size and weight requires appropriate consideration of floor loading, transportation routes, lifting equipment, cabinet clearance and maintenance access.

17. Installation Requirements

A high-power drive requires more installation planning than a compact VFD.

Electrical Installation

The following should be evaluated:

• Incoming voltage
• Three-phase supply
• Motor voltage
• Motor full-load current
• Motor frequency
• Short-circuit rating
• Branch protection
• Grounding
• Motor cable size
• Control wiring
• Network wiring
• Filtering requirements
• Electromagnetic compatibility
• Cable routing

The motor’s nameplate current should be compared against the appropriate duty rating of the drive.

Mechanical Installation

Adequate space should be provided for:

• Installation
• Cable routing
• Ventilation
• Cooling
• Inspection
• Maintenance
• Front access
• Equipment removal
• Lifting
• Service work

The 800 mm cabinet depth should be taken into account during electrical-room and MCC layout planning.

18. Cooling

The drive is air cooled and uses forced-air cooling.

Large power electronic equipment produces significant heat during operation, so the surrounding installation must provide appropriate ventilation.

Important considerations include:

• Ambient temperature
• Airflow
• Cabinet ventilation
• Fan condition
• Air inlet restrictions
• Air outlet restrictions
• Dust accumulation
• Cooling-system maintenance

Industrial environments with significant dust or airborne particles may require more frequent inspection and cleaning.

19. Model Number Interpretation

The catalog number is:

20G1ALE355AN0NNNNN

The individual characters form a configuration code rather than being a simple product serial number.

The important selection information represented by the model includes the PowerFlex 755 family, voltage class, current rating, enclosure/configuration characteristics and option positions.

The 355 portion corresponds to the 355 A current class.

The complete suffix should always be retained when ordering a replacement.

Two drives with the same current rating can have different option configurations, such as different enclosure arrangements, filtering or other factory options.

For this reason, replacing a drive based only on the current rating is not recommended.

20. Configuration Characteristics of 20G1ALE355AN0NNNNN

Configuration	Specification
Drive family	PowerFlex 755
Cooling	Air cooled
Input	AC input with precharge
DC terminals	None
Enclosure	Type 1
Protection class	IP20
Cabinet depth	800 mm
Cabinet style	MCC style
Current	355 A
Light-duty rating	400 HP
Normal-duty rating	350 HP
Heavy-duty rating	300 HP
Voltage	600 VAC
Phase	3-phase
Frame	Frame 8
Filtering	Filtered
CM jumper	Removed
Dynamic braking	None
HIM	Blank / no HIM
Communication	Embedded EtherNet/IP

These configuration characteristics distinguish the AN0NNNNN version from related configurations using different suffix combinations.

21. Five Recommended Related Models in the Same Series

The following models are closely related PowerFlex 755 configurations and are useful when comparing capacity or application requirements.

Model	Voltage	Output current	Light Duty	Normal Duty	Heavy Duty	Frame
20G1ALE295AN0NNNNN	600 VAC	295 A	350 HP	300 HP	250 HP	8
20G1ALE355AN0NNNNN	600 VAC	355 A	400 HP	350 HP	300 HP	8
20G1ALE395AN0NNNNN	600 VAC	395 A	450 HP	400 HP	350 HP	8
20G1ALE435AN0NNNNN	600 VAC	435 A	500 HP	450 HP	350 HP	8
20G1ALE460AN0NNNNN	600 VAC	460 A	500 HP	500 HP	400 HP	8

These ratings show the progression around the 355 A model. The 295 A model is lower in capacity, while the 395 A, 435 A and 460 A models provide progressively greater current capacity.

22. Related Model Parameter Comparison

Parameter	20G1ALE295AN0NNNNN	20G1ALE355AN0NNNNN	20G1ALE395AN0NNNNN	20G1ALE435AN0NNNNN	20G1ALE460AN0NNNNN
Series	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage	600 VAC	600 VAC	600 VAC	600 VAC	600 VAC
Phase	3	3	3	3	3
Output current	295 A	355 A	395 A	435 A	460 A
Light Duty	350 HP	400 HP	450 HP	500 HP	500 HP
Normal Duty	300 HP	350 HP	400 HP	450 HP	500 HP
Heavy Duty	250 HP	300 HP	350 HP	350 HP	400 HP
Frame	8	8	8	8	8
Cooling	Air cooled	Air cooled	Air cooled	Air cooled	Air cooled
Input	AC + precharge	AC + precharge	AC + precharge	AC + precharge	AC + precharge
External DC terminals	None	None	None	None	None
Enclosure	Type 1 / IP20	Type 1 / IP20	Type 1 / IP20	Type 1 / IP20	Type 1 / IP20
Cabinet depth	800 mm class	800 mm class	800 mm class	800 mm class	800 mm class
Communication	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP
Filtering	Filtered	Filtered	Filtered	Filtered	Filtered
Dynamic braking	None	None	None	None	None
Approx. weight	500–600 kg class	500–600 kg class	500–600 kg class	500–600 kg class	500–600 kg class

The current and horsepower ratings in this comparison follow the published 600 V PowerFlex 755 rating tables.

The physical values are approximate planning values for the same general Frame 8/MCC-style class and should not be treated as exact shipping weights for every individual configuration.

23. Five Other Popular Models Under the Same Brand

For a broader product comparison, the following models are useful within the same general high-power drive family.

Model	Series	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	Frame
20G1ALE295AN0NNNNN	PowerFlex 755	600 VAC	295 A	350 HP	300 HP	250 HP	8
20G1ALE395AN0NNNNN	PowerFlex 755	600 VAC	395 A	450 HP	400 HP	350 HP	8
20G1ALE435AN0NNNNN	PowerFlex 755	600 VAC	435 A	500 HP	450 HP	350 HP	8
20G1ALE460AN0NNNNN	PowerFlex 755	600 VAC	460 A	500 HP	500 HP	400 HP	8
20G1ALE510AN0NNNNN	PowerFlex 755	600 VAC	510 A	550 HP	500 HP	450 HP	8

The 395 A, 435 A, 460 A and 510 A models are progressively higher-current options in the same 600 V family.

24. Popular Model Detailed Comparison

Parameter	20G1ALE295AN0NNNNN	20G1ALE395AN0NNNNN	20G1ALE435AN0NNNNN	20G1ALE460AN0NNNNN	20G1ALE510AN0NNNNN
Product family	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755	PowerFlex 755
Voltage	600 VAC	600 VAC	600 VAC	600 VAC	600 VAC
Phase	3-phase	3-phase	3-phase	3-phase	3-phase
Current	295 A	395 A	435 A	460 A	510 A
Light Duty	350 HP	450 HP	500 HP	500 HP	550 HP
Normal Duty	300 HP	400 HP	450 HP	500 HP	500 HP
Heavy Duty	250 HP	350 HP	350 HP	400 HP	450 HP
Cooling	Air cooled	Air cooled	Air cooled	Air cooled	Air cooled
Frame	8	8	8	8	8
Enclosure	Type 1 / IP20	Type 1 / IP20	Type 1 / IP20	Type 1 / IP20	Type 1 / IP20
Cabinet depth	800 mm class	800 mm class	800 mm class	800 mm class	800 mm class
Input	AC + precharge	AC + precharge	AC + precharge	AC + precharge	AC + precharge
External DC terminals	None	None	None	None	None
Communication	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP	EtherNet/IP
Filtering	Filtered	Filtered	Filtered	Filtered	Filtered
Dynamic braking	None	None	None	None	None
Approx. dimensions	2,450 × 600 × 800 mm class	2,450 × 600 × 800 mm class	2,450 × 600 × 800 mm class	2,450 × 600 × 800 mm class	2,450 × 600 × 800 mm class
Approx. weight	500–600 kg class	500–600 kg class	500–600 kg class	500–600 kg class	500–600 kg class

The current and motor-capacity figures for these related configurations correspond to the published 600 V Frame 8 rating range.

25. Difference Between the 355 A Model and Higher-Current Models

The most obvious difference among the related models is output current.

The progression is approximately:

295 A → 355 A → 395 A → 435 A → 460 A → 510 A

As the current rating increases, the applicable motor capacity generally increases as well.

However, a higher-current drive should not automatically be considered a direct replacement for a lower-current model.

Other factors need to be checked, including:

• Motor nameplate current
• Motor horsepower
• Duty cycle
• Overload requirement
• Input voltage
• Enclosure
• Filtering
• Braking
• Cabinet arrangement
• Cable requirements
• Protection requirements
• Control architecture
• Physical installation

26. Advantages Compared with a Fixed-Speed Motor Starter

A conventional motor starter primarily provides switching and protection functions.

A variable frequency drive provides a much broader range of motor-control functions.

Function	Fixed-speed starter	20G1ALE355AN0NNNNN
Motor start/stop	Yes	Yes
Variable speed	Limited / normally no	Yes
Controlled acceleration	Limited	Yes
Controlled deceleration	Limited	Yes
Speed reference	No	Yes
Industrial network integration	Additional equipment may be required	Embedded EtherNet/IP
Large-motor process control	Limited	Yes
Process-based speed adjustment	Limited	Yes
Motor operating feedback	Limited	Available through drive/network functions
Drive diagnostics	Limited	Available through drive functions

This is why the product is particularly useful in automated industrial machinery rather than simple on/off motor applications.

27. Maintenance Considerations

A large air-cooled drive should be included in the plant’s electrical maintenance program.

Important maintenance areas include:

• Cooling fans
• Airflow passages
• Electrical connections
• Power terminals
• Control connections
• Grounding
• Network connections
• Dust accumulation
• Cabinet ventilation
• Alarm history
• Fault history
• Drive temperature
• Motor current
• Operating conditions

The maintenance schedule should be established according to the operating environment and equipment manufacturer’s requirements.

Heavy dust, high ambient temperature, vibration and frequent load changes can affect maintenance requirements.

28. Replacement Considerations

When replacing an existing drive with a 20G1ALE355AN0NNNNN, the old catalog number should be recorded in full.

It is not sufficient to compare only:

355 A

or:

350 HP

The complete configuration needs to be checked.

Particular attention should be paid to:

1. Input voltage
2. Motor current
3. Duty classification
4. Enclosure
5. Cabinet depth
6. Filtering
7. CM jumper configuration
8. Dynamic braking
9. DC terminals
10. Network communication
11. HIM configuration
12. Physical dimensions
13. Cable arrangement
14. Protection requirements
15. Existing control-system compatibility

29. Product Selection Summary

Selection factor	20G1ALE355AN0NNNNN
Model	20G1ALE355AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Application class	High-power industrial AC drive
Voltage	600 VAC
Phase	3-phase
Output current	355 A
Light-duty motor rating	400 HP
Normal-duty motor rating	350 HP
Heavy-duty motor rating	300 HP
Frame	8
Cooling	Forced air
Enclosure	Type 1 / IP20
Cabinet depth	800 mm
Cabinet style	MCC
Approx. dimensions	2,450 × 600 × 800 mm class
Approx. weight	500–600 kg class
Input	AC with precharge
DC terminals	None
Filtering	Filtered
CM jumper	Removed
Dynamic braking	None
Communication	Embedded EtherNet/IP
HIM	Blank / no HIM
Typical applications	Pumps, fans, blowers, conveyors, compressors, process machinery
Main selection consideration	Motor current and duty cycle

30. Final Product Summary

The 20G1ALE355AN0NNNNN is a high-capacity PowerFlex 755 AC variable frequency drive designed for large industrial three-phase motor applications.

Its main electrical characteristics are a 600 VAC three-phase input class and 355 A light-duty output rating, with motor ratings of approximately 400 HP for light duty, 350 HP for normal duty, and 300 HP for heavy duty.

The product uses forced-air cooling, a Frame 8 construction, Type 1/IP20 protection, an 800 mm deep MCC-style arrangement, and embedded EtherNet/IP. The specified AN0NNNNN configuration uses AC input with precharge, no external DC terminals, filtered operation, the CM jumper removed, no dynamic braking option and a blank/no-HIM configuration.

Its application range is broad, particularly where large motors need controlled speed rather than simple fixed-speed operation. Pumps, fans, blowers, conveyors, compressors, water-treatment equipment, material-handling systems and industrial process machinery are all relevant application areas.

The main practical benefits are large-motor control, variable-speed operation, controlled acceleration and deceleration, industrial network integration, multiple duty ratings, and suitability for centralized MCC-style installations.

For purchasing, replacement or engineering use, the complete catalog number 20G1ALE355AN0NNNNN should always be retained. The current rating alone does not define the complete product configuration.

The physical dimensions and weight listed in this document are intended for preliminary planning. Because the actual mechanical arrangement, options and packaging can affect the final dimensions and shipping weight, the exact equipment drawing should be used before designing a foundation, cabinet opening, lifting arrangement or transportation route.