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Allen-Bradley 20G14TF370AN0NNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G14TF370AN0NNNNN is a high-power PowerFlex 755 AC Drive designed for demanding industrial motor-control applications where high output power, reliable speed regulation, flexible control, and integration with industrial automation systems are required.

It belongs to the PowerFlex 750 Series, specifically the PowerFlex 755 family. This model is an air-cooled, floor-mounted high-power drive configuration intended for large three-phase motor applications.

The model is rated for the 690 VAC class and provides a high current capability suitable for large motors and heavy industrial machinery. Its nominal drive rating is 370 A, with different motor-current and power ratings available depending on whether the application is operated under Light Duty, Normal Duty, or Heavy Duty conditions.

The 20G14TF370AN0NNNNN is particularly appropriate for installations where a conventional low-power variable-frequency drive is no longer sufficient. It is intended for large conveyors, pumps, fans, compressors, material-handling systems, processing machinery, large production equipment, and other high-power motor-driven systems.

The PowerFlex 755 architecture is designed around a modular industrial drive platform, allowing the drive to be incorporated into larger automation systems and adapted to different motor-control requirements.

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2. Brand and Product Family

Parameter	Specification
Brand	Allen-Bradley
Product Family	PowerFlex 750 Series
Product Series	PowerFlex 755
Product Type	Air-Cooled AC Drive
Catalog Number	20G14TF370AN0NNNNN
Application Class	High-Power Industrial Variable-Frequency Drive
Cooling Method	Forced-Air / Air-Cooled
Motor System	Three-Phase AC Motor
Voltage Class	690 VAC
Frame	Frame 8
Installation Type	Open Type / Industrial Cabinet Installation
Input Configuration	DC-input/common-bus configuration with precharge
Dynamic Braking	None
HIM	Blank / No HIM
Communication	Embedded EtherNet/IP
Filtering Configuration	Configuration-dependent according to catalog option
Intended Application	Large industrial motor control

The PowerFlex 755 is one of the high-performance drive families within the PowerFlex 750 platform. The family is intended for applications requiring considerably more capability than a basic general-purpose drive, particularly where integration, motor control, diagnostics, and high-power operation are important.

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3. Main Technical Parameters

Parameter	20G14TF370AN0NNNNN Specification
Model	20G14TF370AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Family	PowerFlex 750 Series
Drive Type	Air-Cooled AC Drive
Rated Current	370 A class
Light Duty Rating	400 kW
Normal Duty Rating	355 kW
Heavy Duty Rating	300 kW
Voltage Class	690 VAC
Phase	3 Phase
Frame Size	Frame 8
Cooling	Forced Air
Input Configuration	DC Input with Precharge / Common-Bus Configuration
Motor Voltage Class	690 VAC
Communication	Embedded EtherNet/IP
Dynamic Braking	None
HIM	Blank / No HIM
Enclosure Configuration	Open Type
Installation	Cabinet / Floor-Mount Industrial Installation
Filtering	Factory-configured filtering arrangement
Common-Mode Configuration	Configuration-dependent
Dimensions	Configuration-dependent
Weight	Configuration-dependent kg
Intended Motor Range	Large industrial motors
Duty Selection	Light Duty / Normal Duty / Heavy Duty

The 370 A rating should not be interpreted as a single fixed motor-power rating for every operating condition. The PowerFlex 755 platform uses different duty categories, and the permissible motor size changes according to the thermal and overload requirements of the application.

For this model, the commonly associated ratings are approximately 400 kW for Light Duty, 355 kW for Normal Duty, and 300 kW for Heavy Duty.

The actual motor selection should therefore be based on the motor nameplate current, overload requirement, operating cycle, ambient conditions, acceleration requirements, and the required duty category rather than simply matching the motor’s nominal kW value.

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4. Understanding the 370 A Rating

The 370 A designation is particularly important when selecting this drive for an industrial application.

For a large motor, rated current is often more useful than motor horsepower or kilowatt value when determining drive compatibility. Two motors with similar power ratings may have different current requirements because of motor efficiency, power factor, voltage, duty cycle, and operating conditions.

The 20G14TF370AN0NNNNN provides a high current capacity appropriate for large 690 V-class industrial motors.

The three principal duty ratings can be understood as follows:

Duty Category	Current / Power Class	Typical Application Character
Light Duty	400 kW class	Applications with relatively moderate overload requirements
Normal Duty	355 kW class	General industrial continuous-duty applications
Heavy Duty	300 kW class	Applications requiring greater overload capability
Rated Current Class	370 A	High-power motor control

Heavy-duty applications generally require more thermal margin and overload capability because the motor may experience frequent acceleration, high starting torque, shock loading, or rapidly changing mechanical loads.

Consequently, a 300 kW heavy-duty rating does not mean the drive is inferior to a 400 kW light-duty drive. Instead, the different ratings represent different thermal and overload operating conditions.

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5. Input Configuration

The 20G14TF370AN0NNNNN belongs to the 20G14 configuration group associated with the PowerFlex 755 DC-input/common-bus architecture.

This type of configuration is especially useful in systems where the drive DC bus is supplied by an external DC source or a common DC-bus arrangement rather than treating every drive as an entirely independent AC-input unit.

A common-bus architecture can be beneficial in large industrial systems containing multiple drives because the DC bus can allow energy to be distributed between different drive sections.

For example, during deceleration, energy generated by one motor can potentially be utilized elsewhere within a properly engineered common-bus system instead of simply being dissipated as heat.

The drive includes precharge functionality as part of its DC-input configuration, helping manage the initial charging of the DC link and reducing the electrical stress associated with energizing a large DC bus.

Because common-bus systems involve high DC voltages and significant stored energy, cabinet design, isolation, protection, grounding, disconnecting, precharge, and maintenance procedures must be engineered carefully.

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6. 690 VAC Class

The 20G14TF370AN0NNNNN is designed for the 690 VAC class, making it suitable for high-power industrial systems where 690 V three-phase motors are commonly used.

Using a higher motor voltage for a given power level allows the required motor current to be lower than would be necessary at a lower voltage.

This becomes increasingly important as motor power increases. For large motors, lower current can help reduce conductor size, switching-device stress, busbar requirements, and overall cabinet current levels.

The 690 V class therefore makes this model especially attractive for large processing plants, material-handling installations, mining equipment, large pumping systems, fans, compressors, and other high-power machinery.

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7. Cooling System

The drive uses a forced-air cooling architecture.

High-power semiconductor devices generate considerable heat during operation. Effective thermal management is therefore essential for maintaining reliable drive operation and achieving the expected service life of power components.

The forced-air system moves cooling air through the drive’s heat-producing sections and helps remove heat from the power electronics.

For installation planning, sufficient clearance around the drive and adequate cabinet ventilation are important.

The actual thermal design should take into account:

• Ambient temperature.
• Cabinet ventilation.
• Airflow direction.
• Altitude.
• Continuous motor loading.
• Duty cycle.
• Switching frequency.
• Cabinet heat dissipation.
• Dust and contamination.
• Maintenance condition of cooling fans and air passages.

For large industrial installations, cooling should be considered as part of the complete cabinet design rather than as an isolated drive specification.

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8. Frame 8 Construction

The 20G14TF370AN0NNNNN uses Frame 8 construction.

Frame size is important when planning the mechanical installation because high-power drives are substantially larger and heavier than small wall-mounted drives.

A Frame 8 installation normally requires more attention to:

• Cabinet structure.
• Floor loading.
• Cable routing.
• DC-bus connections.
• Motor output connections.
• Grounding.
• Ventilation.
• Maintenance access.
• Lifting and handling.
• Front access.
• Clearance around power connections.

For high-power Frame 8 equipment, installation should be planned before the drive arrives on site. The cabinet, mounting arrangement, lifting method, cable entry, and service access should be determined during the engineering stage.

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9. Dimensions and Weight

Because the 20G14TF370AN0NNNNN is a high-power Frame 8 configuration and can be integrated into different industrial cabinet arrangements, the final mechanical envelope can depend on the specific installation configuration.

Therefore, the safest catalog-level specification is:

Mechanical Parameter	Specification
Model	20G14TF370AN0NNNNN
Frame	Frame 8
Mounting	Industrial cabinet / floor-mount arrangement
Dimensions	Configuration-dependent
Width	Configuration-dependent
Height	Configuration-dependent
Depth	Configuration-dependent
Weight	Configuration-dependent kg
Service Clearance	Application and cabinet dependent
Cooling Clearance	Installation dependent

The dimensions and weight should be confirmed against the exact mechanical drawing and final packaged configuration before designing the enclosure, transportation method, lifting arrangement, or foundation.

For this reason, it would be inappropriate to insert an estimated weight into a procurement specification and treat that number as the actual shipping or installation weight.

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10. Embedded EtherNet/IP

One of the important characteristics of the PowerFlex 755 platform is its integration capability with industrial control networks.

The PowerFlex 755 family supports EtherNet/IP-based industrial communication, allowing the drive to exchange operating information with an automation controller and other connected equipment.

This can simplify the exchange of information such as:

• Speed reference.
• Start and stop commands.
• Motor current.
• Drive status.
• Fault information.
• Alarm information.
• Output frequency.
• Torque-related information.
• Operating conditions.
• Diagnostic information.

For a large automated production line, this type of communication can be particularly useful because the drive becomes part of the overall control system rather than operating as an isolated motor controller.

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11. Dynamic Braking

The catalog configuration of the 20G14TF370AN0NNNNN is specified without an integrated dynamic-braking package.

This does not mean that controlled deceleration is impossible.

It means that the braking arrangement must be evaluated separately according to the mechanical load and regeneration requirements.

Applications with large rotating inertia can generate substantial regenerative energy when the motor decelerates.

Examples include:

• Large conveyors.
• Centrifugal equipment.
• High-inertia fans.
• Material-handling machinery.
• Hoists.
• Large rotating processing equipment.

If the application requires rapid deceleration, the engineering team should determine whether the system needs a braking resistor, regenerative solution, line regeneration, or another energy-management method.

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12. Product Introduction

The Allen-Bradley 20G14TF370AN0NNNNN is intended for industrial environments where motor power, control reliability, and integration capability are all important.

It is not simply a basic speed controller. The PowerFlex 755 platform is designed as a more comprehensive motor-control solution for large machines and automated systems.

The combination of high current capability, 690 V-class operation, PowerFlex 755 control architecture, forced-air cooling, common-bus capability, and industrial communication makes the product well suited to large-scale machinery.

In a properly designed system, the drive can provide controlled motor starting, speed regulation, acceleration and deceleration management, torque control, fault handling, and communication with the plant automation system.

The Frame 8 construction also positions the model toward applications where compact wall-mounted drives are no longer practical because of motor power and current requirements.

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13. Major Product Advantages

13.1 High-Power Motor Control

The biggest advantage of the 20G14TF370AN0NNNNN is its ability to control large industrial motors.

With a 370 A class rating and 690 V-class system compatibility, it is suitable for applications well beyond the range of small and medium industrial drives.

This makes it useful for centralized motor-control systems and large production machines.

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13.2 Multiple Duty Ratings

The drive offers different power capabilities according to application duty.

This gives engineers more flexibility when selecting the drive for different load conditions.

A relatively smooth, continuously operating load can take advantage of the higher Light Duty rating, while an application with more demanding overload characteristics can be selected using the Heavy Duty rating.

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13.3 690 V-Class Operation

The 690 V class is a major advantage in high-power applications.

For large motors, higher voltage helps keep current at a manageable level.

This can be particularly useful in large plants where long motor cables, large switchgear, substantial busbars, and high motor currents are involved.

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13.4 Common-Bus Capability

The DC-input configuration allows the drive to participate in common-bus architectures.

This can be useful when multiple drives are operating together and the system has been designed to share DC-bus power.

In an appropriately engineered installation, common-bus architecture can improve energy utilization and simplify certain multi-drive system designs.

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13.5 Industrial Network Integration

Embedded EtherNet/IP capability provides a practical way of integrating the drive into an industrial automation network.

Instead of relying entirely on hardwired control signals, the drive can exchange operating and diagnostic information with the automation system.

This can reduce wiring complexity and make system-level diagnostics easier.

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13.6 Suitable for Large Industrial Equipment

The PowerFlex 755 architecture is suitable for machinery that requires more sophisticated motor control than a simple general-purpose inverter.

Typical examples include large conveyors, pumps, fans, compressors, material-processing machines, mining equipment, and large manufacturing systems.

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13.7 Flexible Application Selection

The availability of Light Duty, Normal Duty, and Heavy Duty ratings allows the same drive family to be considered across different mechanical load profiles.

This gives system designers more flexibility when balancing motor power, overload requirements, and drive selection.

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14. Typical Applications

Large Conveyors

The 20G14TF370AN0NNNNN can be used for large conveyor systems in mining, bulk material handling, cement, aggregates, ports, logistics, and manufacturing.

Large conveyors often have substantial inertia and may require controlled acceleration to reduce mechanical stress on belts, gearboxes, couplings, and shafts.

Variable-speed control can also allow the conveyor speed to be adjusted according to production requirements.

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Pumps

Large industrial pumps are another important application.

The drive can be used to regulate pump speed according to process demand.

Instead of operating the pump continuously at full speed and controlling flow primarily through mechanical throttling, variable-speed control can allow the motor speed to follow the process requirement.

This can improve process control and may reduce unnecessary energy consumption.

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Fans and Blowers

Large fans and blowers can require significant motor power.

Variable-frequency control provides the ability to adjust airflow according to process conditions.

This is useful in ventilation, combustion-air systems, process cooling, industrial exhaust, and other applications.

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Compressors

Large compressors often require precise control of motor speed and careful management of acceleration and deceleration.

The high-power capacity of the PowerFlex 755 makes this product family suitable for large compressor systems where the motor and mechanical equipment are properly matched to the drive.

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Mining Equipment

Mining machinery frequently involves high-power motors, large mechanical loads, dust, vibration, and demanding operating cycles.

The 20G14TF370AN0NNNNN can be considered for conveyors, crushers, pumps, fans, ventilation systems, and other large motor-driven equipment.

Site-specific environmental requirements must always be considered during equipment selection.

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Cement and Aggregate Processing

Large crushers, conveyors, fans, mills, feeders, and material-processing equipment can require high-power motor control.

A high-power PowerFlex 755 configuration can provide the required current capacity while also allowing integration into a larger plant automation system.

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Manufacturing Plants

Large production machinery can benefit from centralized drive control, network communication, diagnostics, and programmable operating parameters.

The PowerFlex 755 platform can therefore be used in large manufacturing systems where motor control needs to be integrated with PLC-based automation.

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15. Application Selection Considerations

Before replacing an existing drive with the 20G14TF370AN0NNNNN, several parameters should be checked.

The first consideration is the motor nameplate.

The motor voltage, rated current, frequency, rated speed, power, service factor, and operating duty should all be reviewed.

The second consideration is the mechanical load.

A pump, fan, conveyor, compressor, crusher, and hoist can have very different torque and overload characteristics even if their motors have similar power ratings.

The third consideration is acceleration and deceleration.

High-inertia loads may require significantly more drive capability during acceleration than a simple steady-state power calculation would suggest.

The fourth consideration is the electrical architecture.

Because this model belongs to a DC-input/common-bus configuration, the complete DC-bus system must be considered rather than evaluating the drive in isolation.

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16. Same-Series / Closely Related Models

The following models are closely related PowerFlex 755 configurations and are useful for comparing current and power capacity.

Model	Approx. LD Rating	Approx. ND Rating	Approx. HD Rating	Frame	Voltage Class
20G14TF265AN0NNNNN	315 kW	250 kW	200 kW	Frame 8	690 VAC
20G14TF330AN0NNNNN	355 kW	315 kW	250 kW	Frame 8	690 VAC
20G14TF370AN0NNNNN	400 kW	355 kW	300 kW	Frame 8	690 VAC
20G14TF415AN0NNNNN	450 kW	400 kW	355 kW	Frame 8	690 VAC
20G14TF460AN0NNNNN	500 kW	450 kW	375 kW	Frame 8	690 VAC

These models form a useful progression around the 370 A class drive.

The 20G14TF265AN0NNNNN is appropriate when the motor current requirement is lower and a smaller capacity is sufficient.

The 20G14TF330AN0NNNNN provides a step below the 370 A model and can be considered where the application falls between approximately the 315 kW and 355 kW range depending on duty.

The 20G14TF370AN0NNNNN is the central model discussed in this specification and provides approximately 400 kW Light Duty, 355 kW Normal Duty, and 300 kW Heavy Duty capability.

The 20G14TF415AN0NNNNN is the next higher capacity option and provides additional current and power margin.

The 20G14TF460AN0NNNNN provides still greater capacity for applications approaching the upper end of the Frame 8 range.

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17. Same-Series Comparison

Model	Current Class	LD	ND	HD	Recommended Position
20G14TF265AN0NNNNN	265 A class	315 kW	250 kW	200 kW	Lower-power option
20G14TF330AN0NNNNN	330 A class	355 kW	315 kW	250 kW	Medium-high power
20G14TF370AN0NNNNN	370 A class	400 kW	355 kW	300 kW	Main selection
20G14TF415AN0NNNNN	415 A class	450 kW	400 kW	355 kW	Higher-power option
20G14TF460AN0NNNNN	460 A class	500 kW	450 kW	375 kW	Very high-power option

This progression makes it easier to select a drive according to the motor’s actual current requirement rather than simply selecting a model based on horsepower.

For engineering purposes, it is normally better to select the drive after checking motor rated current and overload requirements first, then verify the corresponding power rating.

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18. Five Popular Allen-Bradley Models for Comparison

The following models are useful additional Allen-Bradley drive references when comparing different power levels and PowerFlex configurations.

Model	Product Family	Typical Voltage Class	Current / Power Class	Application Position
20G11GD034AA0NNNNN	PowerFlex 755	480 VAC class	34 A class	Medium industrial machinery
20G11GD052AA0NNNNN	PowerFlex 755	480 VAC class	52 A class	Pumps, fans, conveyors
20G11GD077AA0NNNNN	PowerFlex 755	480 VAC class	77 A class	Medium/high-power machinery
20G14TE510JN0NNNNN	PowerFlex 755	600 VAC class	510 A class	Large industrial motors
20G14TD740JN0NNNNN	PowerFlex 755	480 VAC class	740 A class	Very high-power industrial systems

These models cover a much wider range of motor applications than the 20G14TF370AN0NNNNN alone.

The smaller PowerFlex 755 models are useful where the motor current is significantly below the 370 A range.

The larger 600 V and 480 V high-current models are more appropriate where the motor and electrical system require substantially greater current capacity.

When comparing these models, voltage class must be considered first. A model with a higher current rating is not automatically a direct replacement because its input voltage, motor voltage, frame size, input architecture, braking arrangement, and enclosure configuration may be different.

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19. Advantages Compared With Smaller Drives

The 20G14TF370AN0NNNNN provides several advantages when compared with smaller variable-frequency drives.

The most obvious advantage is power capacity.

A 370 A class drive can control motors that are far beyond the practical range of compact wall-mounted drives.

The second advantage is the 690 V class.

This allows large motors to operate at higher voltage and helps keep current at a manageable level.

The third advantage is the PowerFlex 755 architecture.

The drive is designed for industrial applications requiring advanced control, communication, diagnostics, and integration.

The fourth advantage is its common-bus capability.

This makes it useful in multi-drive architectures where DC power needs to be distributed between drive sections.

The fifth advantage is scalability.

Because related PowerFlex 755 models are available across a broad current range, a plant can standardize on a similar drive platform while using different current ratings for different machines.

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20. Installation Considerations

The 20G14TF370AN0NNNNN should be installed by personnel familiar with high-power variable-frequency drives and industrial electrical systems.

Because the drive operates in a high-power environment, correct grounding and electrical protection are essential.

The cabinet must provide appropriate physical support and sufficient ventilation.

Power cables should be routed according to the drive installation requirements, with attention to electromagnetic compatibility and separation between power and control wiring.

The motor cable arrangement should also be considered carefully because large motor cables can produce significant electrical noise and common-mode effects.

The installation should provide enough service space for inspection and maintenance.

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21. Maintenance Considerations

Routine maintenance should include inspection of the cooling system, electrical connections, cabinet cleanliness, grounding, ventilation paths, and signs of overheating.

Cooling fans are particularly important in a high-power air-cooled drive.

Dust accumulation can restrict airflow and reduce heat-transfer performance.

Electrical connections should also be checked according to the applicable maintenance schedule and site procedures.

The drive should not be treated as a maintenance-free component simply because it is a solid-state device.

For large industrial installations, preventive maintenance can help identify thermal problems, loose connections, fan deterioration, contamination, and other issues before they result in an unexpected shutdown.

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22. Important Selection Notes

The 20G14TF370AN0NNNNN should be selected according to the complete motor-control application rather than the model number alone.

The following items should be confirmed before purchase or replacement:

1. Motor rated voltage.
2. Motor rated current.
3. Motor rated power.
4. Motor frequency.
5. Motor speed.
6. Required overload capability.
7. Load type.
8. Acceleration time.
9. Deceleration time.
10. Regenerative energy.
11. DC-bus architecture.
12. Required communication network.
13. Cabinet dimensions.
14. Cooling requirements.
15. Ambient temperature.
16. Installation altitude.
17. Motor cable length.
18. Grounding arrangement.
19. Required safety functions.
20. Required braking method.

A drive that has sufficient nominal kW capacity may still be unsuitable if its current rating, overload capability, voltage class, or braking requirements do not match the application.

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23. Overall Product Evaluation

The Allen-Bradley 20G14TF370AN0NNNNN is a high-capacity PowerFlex 755 drive intended for large industrial motor-control applications.

Its 370 A class rating, 690 V class, Frame 8 construction, forced-air cooling, embedded EtherNet/IP capability, and DC-input/common-bus architecture make it particularly suitable for large automated equipment and high-power industrial installations.

Its strongest advantage is not simply its rated power. The real value comes from combining high-power motor control with a flexible industrial drive architecture that can be integrated into larger automation systems.

For applications such as large conveyors, pumps, fans, compressors, mining machinery, cement equipment, bulk-material handling systems, and large manufacturing machines, the PowerFlex 755 platform provides a strong combination of power capacity, control flexibility, communication capability, and system integration.

For a new engineering project, the most important point is to match the drive to the motor’s actual current and duty requirements and to verify the complete electrical and mechanical configuration before final selection.

For replacement projects, the original drive’s catalog number, motor nameplate data, DC-bus arrangement, cabinet configuration, braking requirements, communication architecture, and available installation space should all be checked before selecting a replacement.

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24. Quick Reference

Item	Specification
Model	20G14TF370AN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Family	PowerFlex 750 Series
Product Type	Air-Cooled AC Drive
Current Class	370 A
Light Duty	400 kW
Normal Duty	355 kW
Heavy Duty	300 kW
Voltage Class	690 VAC
Phase	3 Phase
Frame	Frame 8
Cooling	Forced Air
Input Architecture	DC Input / Common-Bus with Precharge
Communication	Embedded EtherNet/IP
Dynamic Braking	None
HIM	Blank / No HIM
Dimensions	Configuration-dependent
Weight	Configuration-dependent kg
Main Applications	Conveyors, pumps, fans, compressors, mining, cement, material handling, manufacturing
Product Position	High-power industrial motor control

In short, the Allen-Bradley 20G14TF370AN0NNNNN is a high-power PowerFlex 755 Frame 8 drive for 690 V-class three-phase motor applications, with a 370 A class current rating and approximately 400 kW LD / 355 kW ND / 300 kW HD capability. It is particularly well suited to large industrial machines where high motor power, common-bus architecture, network integration, and reliable variable-speed control are required.