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Allen-Bradley 20G1G3E355LNDNNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1G3E355LNDNNNNN is a high-power AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large industrial motor-control applications where conventional small and medium-size variable frequency drives are no longer sufficient.

This model is part of the 600 VAC three-phase PowerFlex 755 drive range and is associated with the 355 A class.

The exact electrical configuration is listed with a current rating in the mid-300 A range, making it suitable for substantial industrial motors and high-power mechanical loads.

The drive is particularly appropriate for applications where reliable speed regulation, controlled acceleration, large-motor operation, and integration into an industrial automation system are required.

Typical applications include large pumps, centrifugal fans, blowers, conveyors, compressors, mixers, material-handling systems, process machinery, cooling equipment, and other high-power rotating machinery.

Compared with smaller PowerFlex products, the 20G1G3E355LNDNNNNN is physically much larger and is normally installed as part of an industrial electrical cabinet or dedicated drive lineup.

Its high-power architecture also means that electrical distribution, cooling, cable routing, grounding, maintenance access, and mechanical handling need to be considered during system design.

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2. Brand and Series

Parameter	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Product Type	High-power AC variable frequency drive
Catalog Number	20G1G3E355LNDNNNNN
Voltage Class	600 VAC
Input	Three-phase AC
Current Class	355 A class
Frame	Frame 8
Cooling	Forced air
Enclosure	IP20 / NEMA / UL Type 1 cabinet-style configuration
Drive Application	Industrial motor speed control
Typical Motor Range	Approximately 350 hp Normal Duty class
Heavy Duty Class	Approximately 300 hp class
Light Duty Class	Approximately 400 hp class
Installation	Industrial cabinet / MCC-style installation

The most important identification points are the PowerFlex 755 series, the 600 VAC class, and the 355 A class.

The full catalog number should always be retained when purchasing, replacing, or specifying the drive because individual characters identify the electrical and mechanical configuration.

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3. Main Technical Specifications

Parameter	Specification
Model	20G1G3E355LNDNNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive Type	AC variable frequency drive
Voltage	600 VAC class
Phase	Three-phase
Current Class	355 A
Rated Current	Approximately 355 A class
Frame	Frame 8
Light Duty	Approximately 400 hp class
Normal Duty	Approximately 350 hp class
Heavy Duty	Approximately 300 hp class
Input Frequency	50/60 Hz class
Cooling Method	Forced air
Enclosure	IP20 / NEMA / UL Type 1
Installation Type	Cabinet / industrial drive lineup
Dynamic Braking	Configuration dependent; listed catalog configuration without standard dynamic braking
Motor Control	Variable-speed AC motor control
Feedback	Configuration dependent
Communication	Configuration dependent
Operator Interface	Configuration dependent
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	600 or 800 mm
Approx. Weight	Approximately 623 kg for the basic Frame 8 cabinet configuration

The 355 A class places this model in the high-power portion of the PowerFlex 755 family.

The approximate 350 hp Normal Duty rating provides a useful reference for general industrial applications.

For applications with variable-torque characteristics, the drive can reach approximately the 400 hp Light Duty class.

For applications involving more demanding torque characteristics, the Heavy Duty rating is approximately 300 hp.

Actual drive selection should always be based on motor full-load current, duty cycle, overload requirements and load characteristics rather than horsepower alone.

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4. Electrical Characteristics

The 20G1G3E355LNDNNNNN belongs to the 600 VAC three-phase class.

This voltage class makes it particularly suitable for industrial facilities where larger motors operate at higher voltage levels.

Electrical Parameter	Specification
Model	20G1G3E355LNDNNNNN
Input Voltage Class	600 VAC
Input Phase	Three-phase
Current Class	355 A
Motor Power	Approximately 350 hp Normal Duty class
Light Duty Rating	Approximately 400 hp class
Heavy Duty Rating	Approximately 300 hp class
Frequency	50/60 Hz class
Output	Variable-frequency three-phase AC
Cooling	Forced air
Frame	8

The 600 VAC class can be particularly useful for high-power motor systems because higher voltage allows large motors to operate with lower current than an equivalent-power motor at a lower voltage.

This can have an impact on conductor sizing, electrical distribution, switchgear arrangements and overall plant electrical design.

However, the motor voltage must always match the drive output voltage capability and the motor’s actual nameplate requirements.

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5. Motor Capacity

The 20G1G3E355LNDNNNNN is designed for large motors.

Its approximate duty ratings can be summarized as follows:

Duty Classification	Approximate Motor Capacity	Typical Load
Light Duty	400 hp class	Fans, blowers and variable-torque loads
Normal Duty	350 hp class	General industrial machinery
Heavy Duty	300 hp class	High-torque / demanding loads

The duty classification is important because two motors with the same horsepower can require very different drive capacities.

For example, a centrifugal fan generally has a different torque characteristic from a loaded conveyor.

Similarly, a mixer may have substantially higher starting torque than a centrifugal pump.

For that reason, the drive should be sized using the actual motor current and application duty rather than simply selecting a drive according to horsepower.

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6. Physical Dimensions and Weight

The 20G1G3E355LNDNNNNN uses the larger Frame 8 platform.

This is a major step up in physical size compared with Frame 7 PowerFlex 755 drives.

Physical Parameter	Specification
Model	20G1G3E355LNDNNNNN
Frame	8
Height	2453 mm
Width	600 mm
Depth	600 or 800 mm
Basic Approx. Weight	623 kg
Enclosure	IP20 / NEMA / UL Type 1
Cooling	Forced air
Installation	Cabinet / MCC-style
Approx. Height	96.6 in
Approx. Width	23.6 in
Approx. Depth	23.6 or 31.5 in
Approx. Weight	1374 lb

The approximately 623 kg basic weight is a major consideration during installation.

This is no longer equipment that should be handled like a compact wall-mounted variable frequency drive.

Mechanical lifting, cabinet installation, transportation and floor loading should all be considered in the project design.

The depth can be approximately 600 mm or 800 mm, depending on the particular cabinet configuration.

For a complete installation, additional clearance is required for ventilation, cable routing, maintenance access and safe service work.

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7. Frame 8 Construction

The Frame 8 construction is designed for high-power drive applications.

A Frame 8 installation typically occupies a dedicated section of an industrial electrical lineup.

Frame Parameter	Specification
Model	20G1G3E355LNDNNNNN
Frame Size	8
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	600 / 800 mm
Approx. Weight	623 kg
Cooling	Forced air
Enclosure Style	Cabinet / Type 1 style
Application	High-power industrial motor control

The tall cabinet format provides room for the high-power electrical components, cooling system, power connections and associated control hardware.

This format is particularly suitable for centralized electrical rooms and industrial MCC areas.

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8. Product Introduction

The PowerFlex 755 series was developed for industrial applications requiring a combination of high motor power, flexible control and integration into a larger automation system.

The 20G1G3E355LNDNNNNN represents a high-power configuration within this product family.

Its approximately 355 A current class allows it to control motors substantially larger than those normally served by compact drives.

The drive is especially useful when a production process requires the motor to operate at different speeds rather than continuously running at fixed frequency.

For example, a large pump may need to adjust its flow according to process demand.

A large fan may need to change airflow depending on temperature or ventilation requirements.

A conveyor may need controlled acceleration to avoid mechanical shock.

A mixer may require different operating speeds during different stages of production.

A compressor may need to respond to changing process conditions.

In each of these applications, the variable frequency drive becomes an important part of the machine-control system.

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9. Large Pump Applications

Large industrial pumps are one of the most suitable application areas for a drive of this size.

A pump motor can consume substantial energy when operated continuously at full speed.

Variable-speed operation allows the pump to operate closer to the actual process requirement.

Typical applications include:

• Industrial water systems.
• Cooling-water systems.
• Process-fluid circulation.
• Water transfer systems.
• Large utility pumping systems.
• Industrial treatment systems.
• Process circulation.

The drive can provide controlled acceleration and speed adjustment.

This can also help reduce mechanical shock during startup.

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10. Large Fan and Blower Applications

Large fans and blowers are often operated at different speeds according to the actual airflow requirement.

A high-power drive allows the motor speed to be adjusted instead of relying entirely on fixed-speed operation.

Typical applications include:

• Industrial ventilation.
• Exhaust systems.
• Process-air systems.
• Large cooling systems.
• Combustion-air systems.
• Industrial air circulation.
• Dust extraction systems.

For variable-torque fan applications, the Light Duty rating can be especially relevant.

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11. Conveyor Applications

Large conveyors can present demanding starting conditions.

A conveyor carrying a heavy material load can require considerable torque during acceleration.

Starting the motor too aggressively can place unnecessary stress on:

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

The 20G1G3E355LNDNNNNN can provide controlled acceleration and speed regulation for large conveyor systems when the motor and load requirements fall within its ratings.

For high-torque conveyor applications, the Heavy Duty rating should be considered carefully.

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12. Compressor Applications

Large compressors can require substantial motor power.

The drive can regulate motor speed according to process requirements.

This can be useful in industrial air systems, process compressors and other rotating equipment.

Compressor applications require careful evaluation because compressor torque characteristics vary considerably by machine design.

The correct duty rating should be selected according to the compressor’s actual load profile.

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13. Mixer and Agitator Applications

Mixers and agitators can experience changing torque as material is added or removed.

The motor may need substantial torque during startup and during changes in material viscosity.

The PowerFlex 755 platform can provide controlled acceleration and speed regulation.

Typical applications include:

• Industrial mixing.
• Process blending.
• Liquid agitation.
• Material preparation.
• Production vessels.
• Process tanks.

For high-starting-torque equipment, the Heavy Duty rating should be evaluated rather than using only the motor horsepower as the selection criterion.

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14. Material-Handling Applications

High-power material-handling systems can benefit from variable-speed motor control.

The drive can allow equipment to accelerate smoothly and operate at controlled speed.

Typical equipment includes:

• Large conveyors.
• Transfer systems.
• Material feeders.
• Bulk handling equipment.
• Industrial transport machinery.

The ability to control speed can also help coordinate different sections of a production line.

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15. Process Machinery Applications

The 20G1G3E355LNDNNNNN is suitable for process machinery where speed needs to be adjusted according to operating conditions.

Examples include:

• Large rotating machines.
• Industrial production equipment.
• Process pumps.
• Large blowers.
• Agitators.
• Compressors.
• Material-processing machinery.

The drive can act as the motor-control interface between the motor and the broader automation system.

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16. Main Product Advantages

16.1 High Current Capacity

The approximately 355 A class provides substantial motor-control capacity.

This allows the drive to serve large industrial motors that are beyond the practical range of compact variable frequency drives.

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16.2 600 VAC Operation

The 600 VAC class is suitable for high-power industrial motor systems.

It can be integrated into electrical systems designed around higher-voltage motor distribution.

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16.3 Approximately 350 hp Normal Duty

The approximately 350 hp Normal Duty classification makes this model suitable for a broad range of large industrial machinery.

This includes many general-purpose pumps, fans, conveyors and process machines.

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16.4 Approximately 400 hp Light Duty Capability

For suitable variable-torque applications, the drive can operate in the approximately 400 hp Light Duty class.

This is particularly relevant to large centrifugal fans and pumps.

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16.5 Approximately 300 hp Heavy Duty Capability

The Heavy Duty rating provides a useful reference for more demanding constant-torque applications.

Examples include heavily loaded conveyors, mixers and other high-torque machinery.

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16.6 PowerFlex 755 Architecture

The PowerFlex 755 platform is intended for larger industrial automation systems.

It provides a flexible foundation for applications requiring speed control, feedback, communication and coordinated machine operation.

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16.7 Large Industrial Cabinet Format

The Frame 8 design is appropriate for centralized electrical installations.

The cabinet format provides a practical arrangement for large electrical components and high-power connections.

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16.8 Controlled Motor Acceleration

Controlled acceleration can reduce mechanical shock.

This can be particularly valuable for large rotating machinery.

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16.9 Adjustable Motor Speed

The drive allows process equipment to operate at different speeds.

This provides greater flexibility than a fixed-speed motor system.

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16.10 Industrial Automation Integration

The PowerFlex 755 platform is suitable for integration into a larger control architecture.

This allows motor speed, operating status, alarms and other information to be coordinated with the machine or process-control system.

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17. Power and Energy Management Considerations

Variable-speed operation can be particularly useful for pumps and fans.

Instead of continuously operating at maximum speed, the motor can operate at a speed appropriate to the actual process demand.

The potential energy benefit depends heavily on the load profile.

Variable-torque equipment such as centrifugal pumps and fans can often benefit significantly from speed reduction because their power requirement can fall rapidly as speed decreases.

The actual energy performance of a complete system depends on the motor, pump or fan, process conditions, piping or ductwork, operating schedule and control strategy.

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18. Cooling and Thermal Management

Because the 20G1G3E355LNDNNNNN is a high-power Frame 8 drive, thermal management is an important part of installation design.

The drive uses forced-air cooling.

Adequate airflow must be maintained around the equipment.

Ventilation passages should not be obstructed.

The electrical room should also be evaluated for the combined heat output of all installed drives and electrical equipment.

In a large facility, several high-power drives operating simultaneously can create a significant thermal load.

Therefore, cooling should be designed for the complete installation rather than treating each drive independently.

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19. Installation Requirements

The large physical size of this model means that installation planning should begin before the equipment arrives.

Important considerations include:

• Cabinet dimensions.
• Floor loading.
• Transportation route.
• Lifting equipment.
• Power cable routing.
• Motor cable routing.
• Control wiring.
• Communication wiring.
• Grounding.
• Ventilation.
• Maintenance clearance.
• Safe working space.

The approximate 623 kg basic cabinet weight means that suitable lifting and handling equipment should be provided.

The installation area should also provide sufficient clearance to allow technicians to perform inspection and maintenance safely.

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20. Maintenance Considerations

High-power drives require a structured maintenance program.

Cooling airflow should be inspected regularly.

Fans and ventilation paths should be kept clean.

Electrical connections should be inspected according to the applicable maintenance schedule.

The surrounding cabinet environment should be kept free of excessive dust, moisture and contamination.

Because this drive operates at high voltage and high current, maintenance must be performed using appropriate electrical isolation and safety procedures.

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21. Typical Industrial Industries

Industry	Typical Application
Water Treatment	Large pumps
Industrial Utilities	Pumps and fans
Manufacturing	Conveyors and production machinery
Process Industry	Mixers, pumps and agitators
Material Handling	Large conveyors
Cooling Systems	Fans and pumps
General Industrial	High-power motors
Production Plants	Large rotating equipment
Infrastructure	Pumps, blowers and fans
Process Automation	Variable-speed machinery

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22. Five Recommended Same-Series or Closely Related Models

The following models are useful when selecting another PowerFlex 755 configuration with a similar 600 VAC high-power application range.

Model	Series	Voltage	Current Class	Frame	Light Duty	Normal Duty	Heavy Duty	Approx. Dimensions	Approx. Weight
20G1G3E242LNDNNNNN	PowerFlex 755	600 VAC	242 A class	7	300 hp class	250 hp class	200 hp class	881.5 × 430 × 349.6 mm	72.6–108.9 kg
20G1G3E295LNDNNNNN	PowerFlex 755	600 VAC	295 A class	7	350 hp class	300 hp class	250 hp class	881.5 × 430 × 349.6 mm	72.6–108.9 kg
20G1G3E355LNDNNNNN	PowerFlex 755	600 VAC	355 A class	8	400 hp class	350 hp class	300 hp class	2453 × 600 × 600/800 mm	~623 kg
20G1G3E395LNDNNNNN	PowerFlex 755	600 VAC	395 A class	8	450 hp class	400 hp class	350 hp class	2453 × 600 × 600/800 mm	~623 kg
20G1G3E435LNDNNNNN	PowerFlex 755	600 VAC	435 A class	8	500 hp class	450 hp class	400 hp class	2453 × 600 × 600/800 mm	~623 kg

These models form a useful progression around the 355 A class.

The E242 and E295 configurations provide lower-current alternatives.

The E395 and E435 configurations provide additional capacity when the motor load exceeds the practical range of the E355 configuration.

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23. Five Larger Related Models

For installations requiring still greater motor capacity, larger 600 VAC PowerFlex 755 configurations can be considered.

Model	Series	Voltage	Current Class	Frame	Light Duty	Normal Duty	Heavy Duty	Approx. Dimensions	Approx. Weight
20G1G3E435LNDNNNNN	PowerFlex 755	600 VAC	435 A class	8	500 hp class	450 hp class	400 hp class	2453 × 600 × 600/800 mm	~623 kg
20G1G3E545LNDNNNNN	PowerFlex 755	600 VAC	545 A class	8	600 hp class	550 hp class	450 hp class	2453 × 600 × 600/800 mm	~623 kg
20G1G3E595LNDNNNNN	PowerFlex 755	600 VAC	595 A class	9	700 hp class	600 hp class	550 hp class	2453 × 1200 × 600/800 mm	~1246 kg
20G1G3E690LNDNNNNN	PowerFlex 755	600 VAC	690 A class	9	800 hp class	700 hp class	600 hp class	2453 × 1200 × 600/800 mm	~1246 kg
20G1G3E760LNDNNNNN	PowerFlex 755	600 VAC	760 A class	9	900 hp class	800 hp class	700 hp class	2453 × 1200 × 600/800 mm	~1246 kg

The E435 and E545 configurations remain within the Frame 8 class.

Once the drive reaches the larger E595 and above configurations, the mechanical installation becomes substantially larger.

This is important when planning an upgrade because increasing electrical capacity can also result in a major increase in cabinet footprint, weight and installation requirements.

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24. Five Representative Same-Brand Models

The following are representative models from other PowerFlex product families. They cover smaller and medium-sized motor applications and are not direct replacements for the E355 high-power configuration.

Model	Series	Voltage Class	Current Class	Approx. Power Range	Approx. Dimensions	Approx. Weight	Typical Application
25B-D010N114	PowerFlex 525	480 VAC	10 A class	Approx. 4–7.5 kW	Approx. 180 × 100 × 200 mm	~2–3 kg	Small pumps, fans and conveyors
25B-D017N114	PowerFlex 525	480 VAC	17 A class	Approx. 7.5–11 kW	Approx. 180 × 100 × 200 mm	~3 kg	General machinery
25B-D024N114	PowerFlex 525	480 VAC	24 A class	Approx. 11–15 kW	Approx. 180 × 100 × 200 mm	~3–4 kg	Medium motor applications
25A-D017N114	PowerFlex 523	480 VAC	17 A class	Approx. 7.5–11 kW	Approx. 180 × 100 × 200 mm	~2–3 kg	Compact machinery
20F1ANC030JA0NNNNN	PowerFlex 753	480 VAC	30 A class	Approx. 15–22 kW	Approx. 300 × 200 × 250 mm	~15–20 kg	Process and industrial machinery

These models are representative of other widely used product sizes within the same brand.

They should not be considered direct substitutes for the 20G1G3E355LNDNNNNN.

The PowerFlex 525 and PowerFlex 523 configurations are much smaller and are intended for lower-power machinery.

The PowerFlex 753 is positioned closer to the PowerFlex 755 in terms of industrial application capability, although its power range in the example above is still substantially lower than the E355 configuration.

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25. Comparison of the Main Related 600 VAC Models

Model	Current Class	Frame	Light Duty	Normal Duty	Heavy Duty	Dimensions	Weight
20G1G3E242LNDNNNNN	242 A	7	300 hp	250 hp	200 hp	881.5 × 430 × 349.6 mm	72.6–108.9 kg
20G1G3E295LNDNNNNN	295 A	7	350 hp	300 hp	250 hp	881.5 × 430 × 349.6 mm	72.6–108.9 kg
20G1G3E355LNDNNNNN	355 A	8	400 hp	350 hp	300 hp	2453 × 600 × 600/800 mm	~623 kg
20G1G3E395LNDNNNNN	395 A	8	450 hp	400 hp	350 hp	2453 × 600 × 600/800 mm	~623 kg
20G1G3E435LNDNNNNN	435 A	8	500 hp	450 hp	400 hp	2453 × 600 × 600/800 mm	~623 kg

This comparison illustrates an important characteristic of the PowerFlex 755 family.

The transition from the E295 to the E355 model is not simply an increase in current.

It also represents a significant change in the physical platform from Frame 7 to Frame 8.

That means an E355 upgrade may require more cabinet space and more substantial mechanical handling arrangements even when the electrical upgrade appears relatively straightforward.

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26. Selecting Between E295 and E355

The E295 and E355 configurations are relatively close in electrical capacity, but the physical difference is important.

Parameter	E295	E355
Model	20G1G3E295LNDNNNNN	20G1G3E355LNDNNNNN
Voltage	600 VAC	600 VAC
Current Class	295 A	355 A
Frame	7	8
Light Duty	350 hp class	400 hp class
Normal Duty	300 hp class	350 hp class
Heavy Duty	250 hp class	300 hp class
Approx. Height	881.5 mm	2453 mm
Approx. Width	430 mm	600 mm
Approx. Depth	349.6 mm	600/800 mm
Approx. Weight	72.6–108.9 kg	~623 kg

This comparison demonstrates why the E355 should be treated as a major equipment-size increase.

The electrical capacity increases by approximately 60 A class, but the physical package increases considerably.

Therefore, replacing an E295 with an E355 requires more than checking electrical compatibility.

Cabinet space, lifting arrangements, cable entry, thermal management and floor loading should all be reviewed.

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27. Recommended Applications by Duty

Application	Typical Duty	E355 Suitability
Large centrifugal pump	Variable torque	Very suitable when correctly sized
Large cooling fan	Variable torque	Very suitable
Large blower	Variable torque	Very suitable
Industrial conveyor	Constant torque	Suitable with correct duty selection
Heavy material conveyor	High torque	Evaluate Heavy Duty rating
Large mixer	High starting torque	Evaluate carefully
Process agitator	Constant torque	Suitable when correctly sized
Compressor	Application dependent	Requires load analysis
Process pump	Variable / constant torque	Suitable with correct rating
Industrial production machine	Application dependent	Requires application sizing

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28. Important Advantages for Large Industrial Systems

The 20G1G3E355LNDNNNNN provides several advantages when used in large industrial installations.

First, its high current capacity allows one drive to control a substantial motor rather than requiring multiple smaller drive units.

Second, the 600 VAC class makes it appropriate for high-power motor systems.

Third, the PowerFlex 755 platform provides a flexible foundation for integrating motor control into a larger automation architecture.

Fourth, variable-speed operation can provide process flexibility.

Fifth, controlled acceleration can reduce mechanical stress during startup.

Sixth, the large Frame 8 architecture provides a suitable physical platform for high-power electrical equipment.

Finally, the drive can be used across many different industrial applications, from large pumps and fans to conveyors and process machinery.

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29. Practical Selection Checklist

Before selecting the 20G1G3E355LNDNNN for a project, the following items should be checked.

Selection Item	What to Check
Motor Voltage	Must be compatible with 600 VAC class
Motor Current	Must fall within the applicable drive rating
Motor Horsepower	Compare with LD / ND / HD duty
Load Type	Variable torque or constant torque
Starting Torque	Determine actual starting requirement
Overload	Check required overload duration
Acceleration	Determine required acceleration time
Deceleration	Determine stopping requirements
Braking	Check whether external braking is required
Ambient Temperature	Confirm installation conditions
Cooling	Provide sufficient airflow
Cabinet	Verify Frame 8 dimensions
Weight	Allow for approximately 623 kg basic cabinet weight
Cable Routing	Plan power and control cables
Communication	Select required control interface
Feedback	Determine whether feedback is required
Maintenance	Provide adequate service access

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30. Overall Product Summary

The Allen-Bradley 20G1G3E355LNDNNNNN is a high-power PowerFlex 755 AC variable frequency drive intended for large industrial motor-control applications.

It belongs to the PowerFlex 755 series and operates in the 600 VAC three-phase class.

The model is associated with the 355 A current class and approximately 350 hp Normal Duty, 400 hp Light Duty, and 300 hp Heavy Duty motor-capacity classes.

The drive uses the larger Frame 8 mechanical platform.

Its approximate cabinet dimensions are 2453 mm high × 600 mm wide × 600 or 800 mm deep, with an approximate basic weight of 623 kg.

This physical size should be taken seriously during system design.

Unlike a small wall-mounted drive, the E355 configuration is intended for installation in a substantial industrial electrical cabinet or drive lineup.

The model is well suited to large pumps, fans, blowers, conveyors, compressors, mixers, agitators, process machinery and other large rotating equipment.

Its major advantages include high current capability, 600 VAC operation, large motor capacity, variable-speed control, controlled acceleration, industrial automation integration and a high-power Frame 8 architecture.

The drive is especially useful when a process requires a large motor to operate at different speeds rather than continuously operating at a fixed speed.

For pumps and fans, variable-speed control can help match motor operation to process demand.

For conveyors and material-handling systems, controlled acceleration can help reduce mechanical stress.

For process machinery, adjustable speed can provide greater flexibility during different production stages.

For high-torque applications, the Heavy Duty rating should be evaluated carefully.

For variable-torque applications, the Light Duty rating may provide greater motor capacity.

The most important selection rule is that the motor should be matched according to actual nameplate current, voltage, duty cycle, torque characteristics and overload requirements rather than horsepower alone.

The 20G1G3E355LNDNNNNN therefore represents a substantial step upward from the E295 configuration.

The E295 uses the smaller Frame 7 platform, while the E355 moves into Frame 8 and provides higher current and motor capacity.

For applications requiring still greater capacity, the E395, E435, E545, E595 and larger 600 VAC PowerFlex 755 configurations provide a progression toward higher-current industrial motor systems.

For smaller requirements, the E242 and E295 configurations offer lower-current alternatives within the same general 600 VAC PowerFlex 755 family.

In practical terms, the E355 is best viewed as a large industrial drive for high-power motor applications, rather than simply a larger version of a compact variable frequency drive.

Its combination of 600 VAC operation, approximately 355 A current capability, large motor ratings and Frame 8 construction makes it suitable for demanding industrial installations where reliable variable-speed motor control is a central part of the machine or process.