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Allen-Bradley 20G1ALF370JN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1ALF370JN0NNNNN is a high-power PowerFlex 755 AC variable frequency drive designed for large three-phase industrial motor applications.

This model is a 690 VAC, 370 A, Frame 8 air-cooled drive intended for large motors and demanding industrial machinery. The specified configuration includes embedded EtherNet/IP communication, AC input with precharge, no external DC terminals, Type 1 / IP20 800 mm-deep MCC-style construction, filtering, a CM jumper installed, no dynamic braking, and a blank configuration without a HIM.

The drive provides three principal application ratings:

• 400 kW Light Duty
• 355 kW Normal Duty
• 300 kW Heavy Duty

These ratings make the drive suitable for a wide range of high-power industrial loads, including large pumps, fans, blowers, conveyors, compressors, mixers, agitators, material-handling systems, and process machinery.

The 20G1ALF370JN0NNNNN belongs to the PowerFlex 755 series and is positioned in the high-power 690 VAC Frame 8 range.

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2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	AC Variable Frequency Drive
Model	20G1ALF370JN0NNNNN
Drive Construction	Air Cooled / Forced Air
Voltage Class	690 VAC
Input Phase	Three Phase
Output Current	370 A
Frame Size	Frame 8
Communication	Embedded EtherNet/IP
Input Configuration	AC Input with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20 MCC Style
MCC Depth	800 mm configuration
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Main Application	High-Power Industrial Motor Control

The PowerFlex 755 series is intended for applications where a conventional fixed-speed motor starter is not sufficient and adjustable motor speed, controlled acceleration, controlled deceleration, torque management, process control, diagnostics, and network integration are required.

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3. Main Technical Parameters

Parameter	Specification
Model	20G1ALF370JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Drive Type	AC Variable Frequency Drive
Input Voltage	690 VAC
Input Phase	3 Phase
Output Current	370 A
Light-Duty Rating	400 kW
Normal-Duty Rating	355 kW
Heavy-Duty Rating	300 kW
Frame	8
Cooling	Forced Air
Communication	Embedded EtherNet/IP
Input Type	AC Input with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20
MCC Style	800 mm Deep
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Motor Type	Three-Phase AC Motor
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Weight	623 kg
Typical Installation	Industrial MCC / Floor-Mounted

The electrical configuration and 370 A, 400/355/300 kW ratings correspond to the specified model.

The Frame 8 IP20 / Type 1 MCC-style mechanical envelope is approximately 2453 mm high × 600 mm wide × 600 or 800 mm deep, with an approximate weight of 623 kg. For the 800 mm-deep configuration specified here, 800 mm is the appropriate planning depth. The published weight is approximate and should be confirmed against the final mechanical configuration before shipping, lifting, floor-loading, or cabinet fabrication.

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4. Electrical Rating

The 20G1ALF370JN0NNNNN is designed for a three-phase 690 VAC electrical system.

Its rated output current is 370 A.

The three main application ratings are:

Duty Rating	Power Rating	Typical Application
Light Duty	400 kW	Variable-torque and lower-overload applications
Normal Duty	355 kW	General industrial applications
Heavy Duty	300 kW	Higher-torque and higher-overload applications

The duty rating should be selected according to the actual motor current and mechanical load.

A drive should not be selected simply by comparing the motor’s nominal kW with the largest kW value shown in a catalog.

Motor current, overload requirements, acceleration, deceleration, speed range, load inertia, ambient temperature, altitude, and operating cycle all affect the final selection.

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5. 370 A Output Capacity

The 370 A output rating is one of the key characteristics of this model.

This capacity makes the drive suitable for large industrial motors where a lower-current drive would not provide sufficient operating margin.

A high-current drive can be useful in applications involving:

• Large motors
• High starting torque
• Heavy mechanical loads
• Long acceleration times
• High inertia
• Frequent load changes
• Constant-torque loads
• Large process machinery
• Large material-handling equipment

The actual motor nameplate current should always be compared with the applicable drive duty rating.

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6. 690 VAC Operation

The 690 VAC voltage class makes the drive suitable for high-power industrial motor systems.

Large industrial motors often use higher voltage systems to reduce the current required for a given motor power.

This can influence:

• Power-distribution design
• Conductor sizing
• Switchgear selection
• Transformer selection
• Motor selection
• Cable routing
• Protection-system design

The complete electrical system must be checked before installation.

The supply voltage, frequency, grounding arrangement, short-circuit conditions, protective devices, motor voltage, and installation environment should all be verified.

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7. Light-Duty Rating – 400 kW

The light-duty rating is approximately 400 kW.

This rating is particularly relevant to applications where the motor operates with a variable-torque load and does not require the same overload capability as a demanding constant-torque machine.

Typical examples include:

• Large centrifugal pumps
• Large fans
• Blowers
• Cooling equipment
• Ventilation systems
• Certain water-treatment systems

For a light-duty application, the 400 kW rating provides substantial capacity for large industrial machinery.

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8. Normal-Duty Rating – 355 kW

The normal-duty rating is approximately 355 kW.

Normal-duty operation is suitable for many general industrial applications where the load changes during operation but does not continuously demand the overload capability associated with a heavy-duty application.

Possible applications include:

• Industrial pumps
• Fans
• Conveyors
• Process equipment
• Material-handling systems
• General production machinery
• Industrial ventilation

The motor’s actual full-load current remains the primary electrical selection parameter.

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9. Heavy-Duty Rating – 300 kW

The heavy-duty rating is approximately 300 kW.

Heavy-duty operation is intended for applications that require higher torque or greater overload capability.

Typical examples can include:

• Heavy conveyors
• Mixers
• Agitators
• High-inertia machinery
• Material-handling equipment
• Certain compressors
• Process machinery
• Constant-torque applications

When using the heavy-duty rating, the motor’s current and overload requirements should be carefully compared with the drive rating.

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10. Product Introduction

The Allen-Bradley 20G1ALF370JN0NNNNN is designed to control the speed and torque of large three-phase AC motors.

A variable frequency drive changes the electrical frequency and voltage supplied to the motor so that the motor can operate at different speeds.

This provides much more control than a simple fixed-speed motor starter.

For a pump, the drive can adjust motor speed according to flow demand.

For a fan, it can regulate airflow.

For a conveyor, it can change material-handling speed.

For a mixer, it can provide different speeds for different stages of a process.

For a compressor, it can allow motor operation to follow changing process requirements.

This makes the drive useful in applications where motor speed needs to follow production requirements instead of remaining fixed.

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11. Forced-Air Cooling

The drive uses forced-air cooling.

At a rated output current of 370 A, thermal management is an important consideration.

The installation must provide adequate airflow and heat removal.

Air passages should not be obstructed.

The surrounding electrical room or MCC should also prevent excessive recirculation of hot exhaust air.

The equipment should be kept away from excessive:

• Dust
• Moisture
• Conductive particles
• Corrosive gases
• Oil mist
• Chemical contamination

Good ventilation and cleanliness are important for maintaining stable operating temperatures.

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12. Frame 8 Construction

The 20G1ALF370JN0NNNNN uses Frame 8 construction.

Frame 8 is intended for high-power PowerFlex 755 applications.

The physical size is substantially greater than that of small and medium drive frames.

The approximate Frame 8 MCC-style dimensions are:

• Height: 2453 mm
• Width: 600 mm
• Depth: 600 or 800 mm depending on configuration
• Weight: approximately 623 kg

For the specified 800 mm-deep MCC configuration, the equipment should be planned around an approximate 2453 × 600 × 800 mm mechanical envelope.

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13. Dimensions and Weight

Mechanical Parameter	Approximate Value
Model	20G1ALF370JN0NNNNN
Frame	8
Enclosure	Type 1 / IP20 MCC Style
Height	2453 mm
Width	600 mm
Depth	800 mm
Weight	623 kg
Cooling	Forced Air
Installation	Floor / MCC Style
Service Clearance	Required
Lifting Equipment	Required

The 623 kg value is an approximate Frame 8 MCC-style weight.

The manufacturer documentation identifies 623 kg as the approximate weight for the Frame 8 IP20 / NEMA Type 1 MCC-style cabinet, with dimensions of 2453 mm height, 600 mm width, and 600 or 800 mm depth.

The final shipping weight may be different if additional option cabinets, accessories, external equipment, or a different enclosure arrangement are included.

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14. Embedded EtherNet/IP Communication

The drive includes embedded EtherNet/IP communication.

This allows the drive to become part of an industrial automation network.

Depending on the control architecture, the network can be used for information such as:

• Speed command
• Actual speed
• Motor current
• Drive status
• Fault information
• Warning information
• Control commands
• Operating parameters
• Diagnostic information

This is useful in plants where many large motors need to be controlled and monitored from a centralized control system.

A typical architecture can be:

Control System → EtherNet/IP Network → PowerFlex 755 → Motor

The communication capability can reduce the need for extensive individual hardwired control circuits.

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15. AC Input with Precharge

The specified configuration uses AC input with precharge and has no external DC terminals.

The precharge circuit manages the initial charging of the drive’s DC bus.

This is particularly important in a high-power drive because the DC bus contains substantial stored electrical energy.

A controlled precharge sequence helps manage the initial charging process before normal drive operation begins.

The incoming electrical system must still include properly selected disconnect and protective equipment.

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16. No External DC Terminals

The specified configuration does not provide external DC terminals.

This means the model is intended primarily as an AC-input drive rather than as a drive supplied from an external common DC bus.

Applications requiring common DC-bus operation should be evaluated against the exact required drive configuration before equipment is selected.

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17. Filtered Configuration

The 20G1ALF370JN0NNNNN uses a filtered configuration.

Filtering is useful for controlling conducted electrical noise generated by variable-frequency switching.

However, filtering should not be considered a substitute for correct system installation.

The complete installation should also consider:

• Grounding
• Shielding
• Motor cable construction
• Cable routing
• Separation of power and control wiring
• Cabinet bonding
• Motor insulation
• Network cable routing
• Cable length

Good installation practices are especially important in large industrial facilities containing sensitive electronic equipment.

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18. CM Jumper Installed

The specified model configuration has the CM jumper installed.

This configuration detail is important because common-mode behavior and grounding arrangements can be affected by the exact drive configuration.

The drive should therefore be installed according to the selected grounding system and the requirements of the complete motor-drive installation.

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19. No Dynamic Braking

The specified configuration has no dynamic braking.

This should be considered carefully for applications with high inertia or frequent rapid deceleration.

When a motor decelerates, mechanical energy can return to the drive.

If the application requires frequent high-energy braking, the complete braking strategy should be evaluated.

Depending on the application, the system may require:

• Longer deceleration time
• Mechanical braking
• Regenerative equipment
• Application-specific braking equipment

The appropriate solution depends on the motor inertia, stopping time, operating cycle, and regenerated energy.

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20. Blank / No HIM Configuration

The specified configuration is supplied with a blank / no HIM arrangement.

This is useful where the drive is integrated into a larger control system and local operation is handled through an external operator interface or automation system.

It can also be practical when the drive is installed inside an MCC or electrical room where local operator controls are not required directly on the drive.

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21. Pump Applications

The 20G1ALF370JN0NNNNN is suitable for large pump systems.

Typical applications include:

• Water treatment
• Wastewater treatment
• Industrial water circulation
• Cooling-water systems
• Process-water systems
• Mining water systems
• Irrigation systems
• Utility pumping stations
• Large circulation pumps
• Chemical process pumps

Variable-speed operation allows pump speed to follow actual process demand.

This can improve flow regulation and reduce the need for mechanical throttling.

For variable-torque pump applications, lower motor speed can also substantially reduce the power required by the pumping system.

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22. Fan Applications

Large industrial fans can require high motor power.

The drive can adjust fan speed according to the required airflow.

Applications include:

• Industrial ventilation
• Exhaust systems
• Cooling towers
• Furnace air systems
• Combustion air systems
• Dust collection
• Drying equipment
• Process ventilation
• Large air-handling systems

The ability to operate a fan below full speed can be particularly useful when airflow requirements change throughout the production cycle.

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23. Blower Applications

Large blowers often operate continuously and may require different airflow levels depending on the process.

The drive can regulate motor speed according to:

• Airflow demand
• Pressure requirements
• Process conditions
• Production rate
• Equipment operating status

Typical applications include:

• Wastewater aeration
• Industrial air systems
• Pneumatic processes
• Furnace systems
• Dust collection
• Combustion systems
• Process ventilation

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24. Conveyor Applications

The drive is well suited to large conveyor systems.

Controlled acceleration can reduce sudden torque changes during startup.

This can help reduce stress on:

• Conveyor belts
• Gearboxes
• Couplings
• Rollers
• Shafts
• Mechanical structures
• Conveyed material

Variable-speed operation can also allow the conveyor to be synchronized with other production equipment.

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25. Compressor Applications

Large compressors can require substantial motor current and controlled acceleration.

The 20G1ALF370JN0NNNNN can be considered for high-power compressor applications when the motor current and compressor operating requirements match the drive’s ratings.

Potential applications include:

• Industrial air compressors
• Process compressors
• Utility compressor systems
• Large production compressors
• Process gas equipment

Compressor applications require careful evaluation of minimum speed, maximum speed, acceleration, motor cooling, pressure requirements, and compressor-specific operating restrictions.

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26. Mixer and Agitator Applications

Large mixers and agitators can require high starting torque.

Variable-frequency operation allows the motor to start under controlled conditions and operate at a selected speed.

Potential applications include:

• Chemical mixing
• Slurry processing
• Water treatment
• Mineral processing
• Industrial batch processing
• Tank agitation
• Process mixing

The actual motor current and torque requirement should be checked against the heavy-duty rating when the application has significant starting or continuous torque requirements.

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27. Material-Handling Applications

The drive can be used in large material-handling systems.

Examples include:

• Bulk material conveyors
• Mining conveyors
• Industrial transfer systems
• Large feeders
• Material-processing equipment
• Heavy production machinery

Controlled acceleration can reduce mechanical shock and improve the operating behavior of large material-handling equipment.

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28. Process Machinery Applications

The drive can be used in process machinery where motor speed is an important process variable.

Typical applications include:

• Production machinery
• Continuous-process equipment
• Material-processing systems
• Large mechanical systems
• Manufacturing equipment
• Process pumps
• Large fans
• Large blowers
• Mixing equipment

Variable-speed operation allows machine speed to be adjusted according to production requirements.

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29. Main Product Advantages

29.1 High Current Capacity

The 370 A output rating provides substantial capacity for large industrial motors.

This makes the drive suitable for high-power equipment where smaller drive configurations would not provide adequate current capacity.

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29.2 High-Voltage Motor Compatibility

The 690 VAC rating makes the drive appropriate for high-power industrial motor systems.

It fits installations where 690 VAC motors and electrical distribution systems are already being used.

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29.3 Multiple Duty Ratings

The 400 kW light-duty, 355 kW normal-duty, and 300 kW heavy-duty ratings provide flexibility for different mechanical load types.

This allows engineers to match the drive to the actual duty cycle rather than selecting a drive only according to nominal motor horsepower.

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29.4 Network Integration

Embedded EtherNet/IP makes the drive suitable for networked industrial control.

The drive can communicate operating and diagnostic information with a control system.

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29.5 Controlled Starting

The drive can gradually accelerate the motor.

This can reduce mechanical shock compared with direct fixed-speed starting.

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29.6 Adjustable Speed

The motor can operate at the speed required by the process.

This is especially useful for pumps, fans, blowers, and conveyors.

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29.7 Process Control

Motor speed can be incorporated into a larger process-control strategy.

This provides additional flexibility for regulating flow, pressure, airflow, material movement, and production rate.

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30. Energy Management Advantages

Variable-frequency control can reduce unnecessary motor operation at full speed.

This is particularly useful in variable-torque applications.

For centrifugal pumps and fans, a reduction in operating speed can result in a significant reduction in mechanical power demand.

Actual energy savings depend on:

• Motor efficiency
• Operating hours
• Load profile
• Pump or fan characteristics
• Required flow
• Required pressure
• System resistance
• Speed range
• Control strategy

The drive should therefore be considered as one part of the overall energy-management system.

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31. Motor Control Advantages

The drive provides a flexible platform for controlling large AC motors.

Depending on the application and configured control method, the system can provide:

• Adjustable speed
• Controlled acceleration
• Controlled deceleration
• Torque control
• Process feedback
• Motor monitoring
• Fault monitoring
• Network control
• Operating parameter adjustment

This provides considerably more control than a simple fixed-speed starter.

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32. Maintenance Advantages

A networked drive can provide detailed operating information that assists maintenance personnel.

Useful information may include:

• Motor current
• Output frequency
• Motor speed
• Drive status
• Fault status
• Warning status
• Communication status
• Operating parameters

This information can make troubleshooting more systematic.

Maintenance personnel can examine drive conditions before inspecting individual components.

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33. Environmental Considerations

The specified configuration uses Type 1 / IP20 MCC-style construction.

This type of installation is intended for a controlled industrial electrical environment.

The equipment should be protected from:

• Direct water exposure
• Excessive humidity
• Conductive dust
• Corrosive gases
• Excessive oil contamination
• Conductive foreign material

The surrounding electrical enclosure or equipment room should provide appropriate environmental protection.

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34. Mechanical Installation

The Frame 8 drive is physically large and heavy.

The approximate 623 kg weight means that transportation and installation must be planned carefully.

Important considerations include:

• Floor loading
• Lifting equipment
• Transportation route
• Door clearance
• Cabinet access
• Service clearance
• Cable-entry location
• Ventilation
• Heat removal
• Maintenance access

The drive should be supported correctly during installation to prevent tipping or mechanical damage.

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35. Electrical Installation

The electrical system should be designed around the actual drive and motor ratings.

Important installation components include:

• Incoming power conductors
• Protective devices
• Disconnect equipment
• Grounding conductors
• Motor cables
• Control wiring
• Network cables
• Cabinet ventilation
• Motor protection
• Short-circuit protection

Cable sizes should be selected according to current, installation method, ambient temperature, cable length, insulation requirements, and applicable electrical standards.

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36. Motor Cable Considerations

A variable-frequency drive produces high-frequency switching waveforms.

The motor cable therefore forms an important part of the overall drive system.

The installation should consider:

• Cable construction
• Cable shielding
• Grounding
• Cable length
• Motor insulation
• Common-mode current
• Reflected-wave voltage
• Output filtering
• Separation from control wiring

Long motor cables may require additional engineering depending on the motor, cable construction, installation conditions, and operating voltage.

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37. Motor Selection

Motor selection should be based on actual electrical and mechanical requirements.

Motor Parameter	Selection Consideration
Motor Voltage	Must match the 690 VAC system
Motor Current	Must remain within applicable drive rating
Motor Power	Compare with correct duty rating
Motor Frequency	Verify operating frequency
Motor Speed	Verify required operating range
Starting Torque	Important for heavy loads
Continuous Torque	Important for constant-torque loads
Overload	Compare with selected duty rating
Acceleration	Verify required acceleration time
Deceleration	Evaluate regenerated energy
Cooling	Verify motor cooling at low speed
Insulation	Suitable for variable-frequency operation

The motor nameplate current is one of the most important selection parameters.

A motor should not be selected only by comparing kW values.

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38. Control-System Integration

A typical system can be arranged as:

Operator Interface → Control System → EtherNet/IP → PowerFlex 755 → Motor

The control system can provide a speed reference to the drive.

The drive controls the motor according to the programmed operating parameters.

Operating information can then be returned to the control system.

This type of architecture is particularly useful for plants with multiple large motors.

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39. Recommended Same-Series or Closely Related Models

The following models are closely related 690 VAC PowerFlex 755 configurations and are useful when comparing different motor current requirements.

Model	Voltage	Current	Light Duty	Normal Duty	Heavy Duty	Frame
20G1ALF265AN0NNNNN	690 VAC	265 A	315 kW	250 kW	200 kW	8
20G1ALF330AN0NNNNN	690 VAC	330 A	355 kW	315 kW	250 kW	8
20G1ALF370AN0NNNNN	690 VAC	370 A	400 kW	355 kW	300 kW	8
20G1ALF415AN0NNNNN	690 VAC	415 A	450 kW	400 kW	355 kW	8
20G1ALF460AN0NNNNN	690 VAC	460 A	500 kW	450 kW	375 kW	8

These models provide a practical comparison range around the 370 A configuration.

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40. Related Model – 20G1ALF265AN0NNNNN

The 20G1ALF265AN0NNNNN is a lower-current model in the same general 690 VAC Frame 8 family.

Parameter	Specification
Model	20G1ALF265AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	265 A
Light Duty	315 kW
Normal Duty	250 kW
Heavy Duty	200 kW
Frame	8
Cooling	Air Cooled
Communication	Embedded EtherNet/IP
Input	AC with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20 MCC Style
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Weight	623 kg

This configuration is appropriate for applications where the motor current requirement is below the 370 A level.

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41. Related Model – 20G1ALF330AN0NNNNN

The 20G1ALF330AN0NNNNN provides a lower current rating while remaining within the same general 690 VAC Frame 8 family.

Parameter	Specification
Model	20G1ALF330AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	330 A
Light Duty	355 kW
Normal Duty	315 kW
Heavy Duty	250 kW
Frame	8
Cooling	Air Cooled
Communication	Embedded EtherNet/IP
Input	AC with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20 MCC Style
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Weight	623 kg

This model can be considered when the motor current is below the requirement of the 370 A drive.

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42. Related Model – 20G1ALF415AN0NNNNN

The 20G1ALF415AN0NNNNN provides greater current capacity than the target model.

Parameter	Specification
Model	20G1ALF415AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	415 A
Light Duty	450 kW
Normal Duty	400 kW
Heavy Duty	355 kW
Frame	8
Cooling	Air Cooled
Communication	Embedded EtherNet/IP
Input	AC with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20 MCC Style
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Weight	623 kg

This model is useful when the connected motor requires more current than the 370 A configuration can provide.

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43. Related Model – 20G1ALF460AN0NNNNN

The 20G1ALF460AN0NNNNN provides an additional higher-current option.

Parameter	Specification
Model	20G1ALF460AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	460 A
Light Duty	500 kW
Normal Duty	450 kW
Heavy Duty	375 kW
Frame	8
Cooling	Air Cooled
Communication	Embedded EtherNet/IP
Input	AC with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20 MCC Style
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Weight	623 kg

It provides additional current capacity for large motor applications.

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44. Related Model – 20G1ALF500AN0NNNNN

The 20G1ALF500AN0NNNNN is a higher-capacity configuration within the same high-power 690 VAC group.

Parameter	Specification
Model	20G1ALF500AN0NNNNN
Series	PowerFlex 755
Voltage	690 VAC
Current	500 A
Light Duty	530 kW
Normal Duty	500 kW
Heavy Duty	400 kW
Frame	8
Cooling	Air Cooled
Communication	Embedded EtherNet/IP
Input	AC with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20 MCC Style
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Weight	623 kg

This configuration can be considered for applications requiring considerably more motor current.

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45. Five Same-Brand Reference Models

The following models are useful same-brand PowerFlex reference models covering different current and voltage ranges.

They are presented as reference models rather than as a ranking.

Model	Series	Voltage Class	Current	Frame	Typical Application
20G1ANF061JN0NNNNN	PowerFlex 755	690 VAC	61 A	6	Medium-power motor control
20G1ANF082JN0NNNNN	PowerFlex 755	690 VAC	82 A	6	Pumps, fans and conveyors
20G1ANF098JN0NNNNN	PowerFlex 755	690 VAC	98 A	6	Process machinery
20G1ALE295AN0NNNNN	PowerFlex 755	600 VAC class	295 A	8	Large industrial motors
20G1ALE355AN0NNNNN	PowerFlex 755	600 VAC class	355 A	8	Large industrial motor systems

These models should not be treated as direct replacements.

A substitution should always be checked for voltage class, current rating, duty rating, frame, enclosure, cooling arrangement, braking requirements, communication requirements, and mechanical installation.

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46. Main 690 VAC Model Comparison

Model	Current	Light Duty	Normal Duty	Heavy Duty	Voltage	Frame
20G1ALF265AN0NNNNN	265 A	315 kW	250 kW	200 kW	690 VAC	8
20G1ALF330AN0NNNNN	330 A	355 kW	315 kW	250 kW	690 VAC	8
20G1ALF370AN0NNNNN	370 A	400 kW	355 kW	300 kW	690 VAC	8
20G1ALF415AN0NNNNN	415 A	450 kW	400 kW	355 kW	690 VAC	8
20G1ALF460AN0NNNNN	460 A	500 kW	450 kW	375 kW	690 VAC	8
20G1ALF500AN0NNNNN	500 A	530 kW	500 kW	400 kW	690 VAC	8

The progression provides several current and power options for large 690 VAC motor systems.

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47. Application Comparison

Application	Suitability	Main Reason
Large Pump	High	Variable-speed flow and pressure control
Large Fan	High	Adjustable airflow
Large Blower	High	Process air regulation
Conveyor	High	Controlled acceleration and speed
Compressor	High	Adjustable motor operation
Mixer	High	Speed and torque control
Agitator	High	Adjustable process speed
Water Treatment	High	Pump and blower control
Mining Equipment	High	Large industrial motor applications
Material Handling	High	High-power conveyor systems
Process Machinery	High	Flexible motor speed control
Small Motor	Low	Drive capacity is excessive

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48. Advantages for Pump Systems

For a large pump, the drive can adjust motor speed according to process requirements.

This can provide:

• Adjustable flow
• Adjustable pressure
• Controlled acceleration
• Controlled stopping
• Reduced mechanical shock
• Improved process regulation
• Network monitoring
• Centralized control

Variable-speed operation can also reduce unnecessary energy consumption in variable-torque pumping applications.

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49. Advantages for Fan Systems

Large fans can operate at different speeds according to the required airflow.

Potential benefits include:

• Adjustable airflow
• Soft starting
• Reduced mechanical stress
• Variable operating speed
• Remote control
• Network monitoring
• Fault diagnostics
• Reduced unnecessary full-speed operation

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50. Advantages for Conveyor Systems

Large conveyors can experience considerable mechanical stress during startup.

The drive can apply a controlled acceleration profile.

This can reduce sudden torque transmission through the mechanical system.

Potential benefits include:

• Smooth starting
• Reduced belt shock
• Reduced gearbox stress
• Adjustable speed
• Process synchronization
• Controlled stopping
• Improved material handling

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51. Advantages for Process Machinery

Process machinery often requires different speeds at different stages of production.

The drive provides motor speed as an adjustable process variable.

This can be useful for:

• Production-rate control
• Flow control
• Mixing control
• Material movement
• Ventilation
• Pumping
• Process synchronization

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52. High-Inertia Load Considerations

Large rotating machinery can store substantial mechanical energy.

During deceleration, that energy can return to the drive.

Because the specified configuration does not include dynamic braking, applications requiring frequent rapid stopping should be evaluated carefully.

The required deceleration time and regenerated energy should be considered during engineering.

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53. Control-System Advantages

The drive can be integrated into a centralized industrial automation system.

A typical arrangement is:

Operator Interface → Control System → EtherNet/IP → PowerFlex 755 → Motor

The control system can provide speed references and receive operating information from the drive.

This can make large multi-motor systems easier to monitor and manage.

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54. Maintenance and Troubleshooting

Maintenance personnel can use drive information to investigate operating problems.

Useful information can include:

• Motor current
• Output frequency
• Motor speed
• Drive status
• Fault information
• Warning information
• Network status
• Operating parameters

Routine maintenance should include:

• Cooling fan inspection
• Airflow inspection
• Cabinet cleaning
• Electrical connection inspection
• Grounding inspection
• Motor cable inspection
• Network connection inspection
• General visual inspection

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55. Installation Environment

The IP20 / Type 1 MCC-style configuration is intended for a controlled industrial environment.

The drive should be protected from:

• Direct water
• Excessive moisture
• Conductive dust
• Corrosive gases
• Excessive oil contamination
• Conductive foreign material

The surrounding cabinet or electrical room should provide adequate environmental protection and ventilation.

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56. Mechanical Installation Requirements

Because the Frame 8 unit weighs approximately 623 kg, mechanical handling must be planned carefully.

The installation should consider:

• Floor loading
• Lifting equipment
• Transportation route
• Door opening dimensions
• Cabinet access
• Maintenance space
• Cable-entry location
• Ventilation
• Heat dissipation
• Service clearance

The equipment should be properly supported during installation.

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57. Electrical Installation Requirements

The electrical system should include correctly sized:

• Incoming conductors
• Protective devices
• Disconnect equipment
• Grounding conductors
• Motor cables
• Control wiring
• Network cables
• Cabinet ventilation equipment

The final conductor and protective-device selection should be based on the actual installation conditions and applicable electrical requirements.

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58. Recommended Application Areas

Water and Wastewater

Large pumps, aeration blowers, circulation pumps, lift systems, and process-water equipment.

Mining

Large conveyors, pumps, fans, blowers, and material-processing equipment.

Manufacturing

Large production machinery, process equipment, conveyors, and plant utility systems.

Chemical Processing

Pumps, mixers, agitators, blowers, and other large process machinery.

Materials Processing

Large fans, conveyors, pumps, material-handling equipment, and auxiliary systems.

Utilities

Large pumps, cooling systems, ventilation equipment, and auxiliary machinery.

General Industrial Equipment

Any high-power 690 VAC three-phase motor application that fits the drive’s electrical and mechanical ratings.

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59. Detailed Product Specification Summary

Specification	20G1ALF370JN0NNNNN
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Product Type	AC Variable Frequency Drive
Input Voltage	690 VAC
Phase	Three Phase
Output Current	370 A
Light-Duty Rating	400 kW
Normal-Duty Rating	355 kW
Heavy-Duty Rating	300 kW
Frame	8
Cooling	Forced Air
Communication	Embedded EtherNet/IP
Input Configuration	AC Input with Precharge
External DC Terminals	None
Enclosure	Type 1 / IP20
MCC Style	800 mm Deep
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
HIM	Blank / No HIM
Approx. Height	2453 mm
Approx. Width	600 mm
Approx. Depth	800 mm
Approx. Weight	623 kg
Typical Motor	Large Three-Phase AC Motor
Typical Applications	Pumps, Fans, Blowers, Conveyors, Compressors, Mixers and Process Machinery
Installation	Industrial MCC / Floor-Mounted

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60. Quick Reference – Five Closely Related Models

Model	Current	LD	ND	HD	Voltage	Frame
20G1ALF265AN0NNNNN	265 A	315 kW	250 kW	200 kW	690 VAC	8
20G1ALF330AN0NNNNN	330 A	355 kW	315 kW	250 kW	690 VAC	8
20G1ALF370AN0NNNNN	370 A	400 kW	355 kW	300 kW	690 VAC	8
20G1ALF415AN0NNNNN	415 A	450 kW	400 kW	355 kW	690 VAC	8
20G1ALF460AN0NNNNN	460 A	500 kW	450 kW	375 kW	690 VAC	8

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61. Quick Reference – Five Same-Brand Models

Model	Series	Voltage	Current	Frame	General Application
20G1ANF061JN0NNNNN	PowerFlex 755	690 VAC	61 A	6	Medium-power motor control
20G1ANF082JN0NNNNN	PowerFlex 755	690 VAC	82 A	6	Pumps and fans
20G1ANF098JN0NNNNN	PowerFlex 755	690 VAC	98 A	6	Process machinery
20G1ALE295AN0NNNNN	PowerFlex 755	600 VAC class	295 A	8	Large industrial motors
20G1ALE355AN0NNNNN	PowerFlex 755	600 VAC class	355 A	8	Large industrial motor systems

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62. Overall Product Description

The Allen-Bradley 20G1ALF370JN0NNNNN is a high-power 690 VAC PowerFlex 755 variable frequency drive designed for large three-phase AC motors.

Its 370 A output rating provides substantial current capacity for high-power industrial machinery.

The drive provides approximately 400 kW light-duty, 355 kW normal-duty, and 300 kW heavy-duty ratings, allowing it to cover a broad range of industrial load requirements.

The Frame 8 forced-air construction is intended for large industrial installations.

The embedded EtherNet/IP interface allows the drive to be incorporated into a networked automation system for motor control, monitoring, diagnostics, and process coordination.

The AC input with precharge, no external DC terminals, filtered configuration, CM jumper installed, Type 1 / IP20 enclosure, and 800 mm MCC-style depth provide a configuration intended for properly engineered industrial electrical installations.

The drive is particularly suitable for large pumps, fans, blowers, conveyors, compressors, mixers, agitators, material-handling equipment, and process machinery.

Its main practical advantages are high current capacity, 690 VAC compatibility, adjustable motor speed, controlled acceleration and deceleration, network integration, process-control capability, and detailed operating information.

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63. Final Technical Summary

The 20G1ALF370JN0NNNNN can be summarized as follows:

• Allen-Bradley brand
• PowerFlex 755 series
• 690 VAC three-phase input
• 370 A output current
• 400 kW light-duty rating
• 355 kW normal-duty rating
• 300 kW heavy-duty rating
• Frame 8
• Forced-air cooling
• Embedded EtherNet/IP
• AC input with precharge
• No external DC terminals
• Type 1 / IP20 MCC-style construction
• 800 mm-deep configuration
• Filtered configuration
• CM jumper installed
• No dynamic braking
• Blank / no HIM configuration
• Approximately 2453 mm height
• Approximately 600 mm width
• Approximately 800 mm depth
• Approximately 623 kg weight

The 20G1ALF370JN0NNNNN is a high-power industrial variable frequency drive intended for large motor systems where controlled speed, substantial current capacity, process flexibility, and industrial network integration are required.

For final equipment selection, the motor nameplate current, duty cycle, overload requirement, voltage, operating speed range, braking requirements, environmental conditions, motor-cable length, installation dimensions, cooling requirements, and complete ordered configuration should all be evaluated together.