Company Information
E-mail		[email protected]
Mobile		+8615980777398
Whatsapp		+8615980777398
WeChat		15980777398

Allen-Bradley 20G14NF171JN0NNNNN PowerFlex 755 AC Drive – Detailed Product Guide

1. Product Overview

The Allen-Bradley 20G14NF171JN0NNNNN is a high-power PowerFlex 755 air-cooled AC drive designed for large industrial motor-control applications.

It is a 690 VAC, three-phase, DC-input drive with precharge, rated at 171 A / 160 kW for Normal Duty and 142 A / 132 kW for Heavy Duty.

The drive uses a Frame 7 open-type construction and is designed primarily for installation inside an industrial electrical cabinet or control enclosure.

One of the most important features of this exact catalog number is the JN0 configuration. Unlike the corresponding JA0 version, this model does not include an internal dynamic braking transistor.

The drive is supplied with filtering and the CM jumper installed, while the operator interface is specified as Blank / No HIM.

The 20G14NF171JN0NNNNN is therefore a good fit for large industrial machines where high motor power, adjustable speed, centralized automation, and reliable cabinet-based drive control are required, but where an internal dynamic braking transistor is not part of the selected drive configuration.

---

2. Product Identification

Parameter	Specification
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Family	PowerFlex 750-Series
Model / Part Number	20G14NF171JN0NNNNN
Product Type	Air-Cooled AC Drive
Product Description	PowerFlex 755 AC Packaged Drive
Voltage Class	690 VAC
Phase	Three Phase
Input Type	DC Input with Precharge
Normal Duty Current	171 A
Normal Duty Power	160 kW
Heavy Duty Current	142 A
Heavy Duty Power	132 kW
Frame Size	Frame 7
Enclosure Type	Open Type
Cooling	Air Cooled
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Internal Dynamic Braking Transistor	Not Included
Internal Braking Resistor	Not Included
HIM	Blank / No HIM
Network Capability	Embedded EtherNet/IP capability
Operating Temperature	Approximately 0–50 °C
Relative Humidity	Approximately 5–95%, non-condensing
Storage Temperature	Approximately -40 to +70 °C
Width	Approximately 430 mm
Height	Approximately 881.5 mm
Depth	Approximately 349.6 mm
Dimensions	430 × 881.5 × 349.6 mm
Weight	Approximately 72.6–108.9 kg
Installation	Industrial cabinet / panel
Primary Function	High-power variable-speed motor control

---

3. Electrical Specifications

The 20G14NF171JN0NNNNN is designed for high-power industrial motor applications.

Its 690 VAC voltage class and 171 A Normal Duty output rating make it suitable for large three-phase motors used in process equipment, material handling, pumping systems, fans, blowers, conveyors, and other industrial machinery.

Electrical Parameter	Specification
Model / Part Number	20G14NF171JN0NNNNN
Voltage	690 VAC
Phase	Three Phase
Input Configuration	DC Input with Precharge
Normal Duty Current	171 A
Normal Duty Power	160 kW
Heavy Duty Current	142 A
Heavy Duty Power	132 kW
Frame	Frame 7
Cooling	Air Cooled
Enclosure	Open Type
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking Transistor	None
Braking Resistor	Not Included
HIM	Blank / No HIM
Network	Embedded EtherNet/IP capability
Dimensions	430 × 881.5 × 349.6 mm
Weight	Approximately 72.6–108.9 kg

The drive provides two main current and power ratings.

For Normal Duty operation, the drive is rated at 171 A / 160 kW.

For Heavy Duty operation, the rating is 142 A / 132 kW.

The correct rating should be determined from the motor’s actual full-load current and the mechanical load profile.

Simply selecting a drive based on motor kW can be misleading in applications where the motor experiences high starting torque, frequent overloads, repeated acceleration and deceleration, or other severe operating conditions.

---

4. Normal Duty and Heavy Duty Ratings

The dual-rating system is particularly important for industrial drive selection.

Duty Category	Rated Current	Rated Power
Normal Duty	171 A	160 kW
Heavy Duty	142 A	132 kW

The 160 kW Normal Duty rating makes this model suitable for large motors operating under normal load conditions.

The 132 kW Heavy Duty rating is intended for applications requiring a more demanding load profile.

When engineering a complete system, the motor nameplate current, load torque, acceleration requirements, duty cycle, ambient conditions, and required overload performance should all be considered.

---

5. Mechanical Specifications

The 20G14NF171JN0NNNNN belongs to the Frame 7 mechanical platform.

This is an important distinction because Frame 7 drives are physically larger than the Frame 6 models in the same 690 VAC PowerFlex 755 range.

Mechanical Parameter	Specification
Model / Part Number	20G14NF171JN0NNNNN
Frame Size	Frame 7
Enclosure	Open Type
Cooling Method	Air Cooled
Width	Approximately 430 mm
Height	Approximately 881.5 mm
Depth	Approximately 349.6 mm
Dimensions	430 × 881.5 × 349.6 mm
Approximate Weight	72.6–108.9 kg
Mounting	Vertical industrial mounting
Installation	Electrical cabinet / control panel
Cabinet Integration	Required
Ventilation	Required
Maintenance Access	Required
Mechanical Support	Heavy-duty mounting structure recommended

The approximate dimensions of 430 mm × 881.5 mm × 349.6 mm should be taken into account before designing the cabinet.

The weight can vary depending on the exact configuration, so the approximate range of 72.6–108.9 kg should be considered when designing the mounting structure and determining lifting requirements.

The cabinet should also provide adequate airflow around the drive.

---

6. Dynamic Braking Configuration

The JN0 configuration is one of the defining characteristics of this catalog number.

The 20G14NF171JN0NNNNN is supplied with no internal dynamic braking transistor.

Braking Parameter	Specification
Model / Part Number	20G14NF171JN0NNNNN
Dynamic Braking	None
Internal DB Transistor	Not Included
Internal Braking Resistor	Not Included
External Braking Resistor	May be required depending on application
High-Inertia Deceleration	Requires application evaluation
Rapid Deceleration	Requires braking-system evaluation
Regenerative Energy Management	External solution may be required

This configuration is useful when the application does not require an internal dynamic braking transistor.

For applications with significant regenerative energy, the engineer must evaluate how the energy generated during deceleration will be handled.

This is especially important for large rotating loads, high-inertia machinery, and applications requiring frequent or rapid stopping.

---

7. JA0 Versus JN0

The most useful comparison for this model is the corresponding JA0 version.

Parameter	20G14NF171JN0NNNNN	20G14NF171JA0NNNNN
Model / Part Number	20G14NF171JN0NNNNN	20G14NF171JA0NNNNN
Voltage	690 VAC	690 VAC
Normal Duty	171 A / 160 kW	171 A / 160 kW
Heavy Duty	142 A / 132 kW	142 A / 132 kW
Frame	Frame 7	Frame 7
Cooling	Air Cooled	Air Cooled
Enclosure	Open Type	Open Type
Filtering	Filtered	Filtered
CM Jumper	Installed	Installed
Dynamic Braking Transistor	Not Included	Included
Internal Braking Resistor	Not Included	Not Included
HIM	Blank / No HIM	Blank / No HIM
Dimensions	430 × 881.5 × 349.6 mm	430 × 881.5 × 349.6 mm
Weight	72.6–108.9 kg	72.6–108.9 kg

The electrical power rating is essentially the same between these two configurations.

The major difference is the braking configuration.

The JA0 version includes the internal dynamic braking transistor.

The JN0 version does not.

Therefore, the choice between these two models should be based largely on the machine’s braking requirements and overall system architecture.

---

8. Product Introduction

The Allen-Bradley 20G14NF171JN0NNNNN is designed for large industrial motor-control systems where a high-capacity variable-frequency drive is required.

With a Normal Duty rating of 160 kW, the drive is suitable for substantial motors that are beyond the practical range of many compact drive products.

The 690 VAC platform makes it particularly suitable for industrial facilities using higher-voltage motor systems.

The drive is air cooled and open type, so it is normally installed inside a properly engineered electrical cabinet.

This arrangement gives system integrators considerable flexibility.

The drive can be combined with PLC equipment, industrial networking equipment, disconnects, circuit protection, terminal blocks, reactors, contactors, control equipment, and other components required for the complete motor-control system.

The blank / no-HIM configuration is also useful in automated installations where operators are expected to control the machine through an HMI, PLC, SCADA system, or another centralized interface.

---

9. Product Series

The 20G14NF171JN0NNNNN belongs to the PowerFlex 755 series.

The PowerFlex 755 platform is intended for applications requiring considerably more capability than a basic compact variable-frequency drive.

Series Parameter	Specification
Model / Part Number	20G14NF171JN0NNNNN
Series	PowerFlex 755
Family	PowerFlex 750-Series
Drive Class	Industrial AC Drive
Power Range	High-power industrial
Voltage Class	690 VAC
Current Class	171 A Normal Duty
Frame	Frame 7
Cooling	Air Cooled
Application	Industrial motor control
Network Integration	Embedded EtherNet/IP capability
Dynamic Braking	No internal DB transistor

The PowerFlex 755 series is particularly useful when the drive must become part of a larger industrial automation system.

---

10. Main Applications

10.1 Large Conveyor Systems

Large conveyor systems can benefit significantly from variable-speed motor control.

A conveyor motor may need to accelerate a large mass gradually rather than applying full speed immediately.

Controlled acceleration can reduce mechanical stress on belts, couplings, gearboxes, shafts, and bearings.

The 171 A / 160 kW Normal Duty rating gives the drive enough capacity for substantial conveyor installations.

Where the conveyor has a high-inertia load or requires rapid stopping, the braking arrangement should be carefully evaluated because the JN0 version does not contain the internal dynamic braking transistor.

---

10.2 Mining and Bulk Material Handling

Large material-handling systems often require high-power motors.

Possible applications include:

• Bulk-material conveyors
• Ore-handling systems
• Processing equipment
• Transfer systems
• Large ventilation equipment
• Pumps
• Heavy rotating machinery

The 690 VAC platform is appropriate for many large industrial motor installations.

Environmental conditions must still be considered carefully in mining and heavy-industry environments.

---

10.3 Large Industrial Pumps

Large pumps can require substantial motor power, especially in water treatment, process industries, cooling systems, circulation systems, and industrial utilities.

Variable-speed operation allows pump speed to be adjusted to process requirements.

This can provide more flexible control than simply operating the pump continuously at full speed.

The drive can also be integrated into a centralized automation system for coordinated process control.

---

10.4 Large Fans

Large industrial fans are another important application.

Examples include:

• Industrial ventilation
• Process exhaust
• Cooling systems
• Combustion-air systems
• Furnace ventilation
• Dust collection
• Process-air equipment

Variable-speed control allows airflow to be adjusted to the actual process requirement.

This can make the drive useful in applications where full-speed operation is not always required.

---

10.5 Large Blowers

Large blowers can also benefit from adjustable-speed control.

A blower operating continuously at full speed may not always be necessary.

The drive allows the motor speed to be controlled according to process demand.

For blower applications, the complete load curve should be considered during drive selection.

---

10.6 Compressors

The 20G14NF171JN0NNNNN can be considered for compressor applications where variable-speed operation is supported by the compressor design.

Variable speed can help match compressor output to changing demand.

However, compressor systems can have specific lubrication, acceleration, minimum-speed, and starting requirements.

These factors should be evaluated before finalizing the drive selection.

---

10.7 Industrial Process Machinery

Large process machinery can require substantial motor power and flexible speed control.

Potential applications include:

• Mixers
• Agitators
• Processing equipment
• Production machinery
• Material-processing systems
• Large rotating machinery

The drive can be integrated with the machine’s PLC and HMI so that motor speed and process operation can be coordinated.

---

10.8 Material Handling Equipment

Material handling equipment often benefits from controlled acceleration and deceleration.

This can help reduce mechanical shock and improve machine operation.

The high-power rating of this model makes it suitable for larger systems where smaller general-purpose drives would not provide sufficient current capacity.

---

11. Major Product Advantages

High 160 kW Normal Duty Rating

The biggest advantage of the 20G14NF171JN0NNNNN is its high power capacity.

The 160 kW Normal Duty rating allows the drive to control large industrial motors without moving immediately into an even larger drive platform.

---

690 VAC Voltage Class

The 690 VAC class is particularly useful for high-power industrial systems.

Higher motor voltage can help keep motor current within a practical range for large machines.

This can be advantageous when designing large motor feeders, cables, switchgear, and electrical distribution systems.

---

Large Industrial Current Capacity

With a Normal Duty output current of 171 A, the drive is capable of handling substantial motor loads.

The Heavy Duty rating of 142 A / 132 kW provides another useful operating point for more demanding load profiles.

---

Air-Cooled Construction

The air-cooled architecture provides a practical thermal-management approach for cabinet-based industrial installations.

It eliminates the need for a dedicated liquid cooling system.

However, cabinet airflow and heat dissipation still need to be designed properly.

---

Open-Type Construction

The open-type design provides flexibility for system integrators.

The drive can be installed inside a larger electrical enclosure together with other automation and power-control components.

This is particularly useful for custom control panels and large industrial machines.

---

Industrial Network Integration

The PowerFlex 755 platform supports integration with industrial automation networks.

This allows drive commands, status information, diagnostic information, and operating data to be incorporated into the wider control system.

For large facilities containing many drives, centralized communication can simplify operation and maintenance.

---

Blank / No HIM

The no-HIM configuration is useful where local drive operation is not required.

The machine operator can instead interact with the system through an HMI or supervisory control system.

This approach is common in automated production environments.

---

Filtered Configuration

The drive is supplied with the filtering and CM jumper configuration specified by the catalog number.

This provides a defined configuration for system design.

The overall installation should still follow the appropriate grounding, cable-routing, EMC, and cabinet-design practices.

---

12. Advantages of the JN0 Configuration

The absence of the internal dynamic braking transistor is not necessarily a disadvantage.

In an application where dynamic braking is not required, the JN0 configuration can provide a straightforward drive arrangement without paying for a braking feature that the machine does not need.

It can also make sense where braking energy is managed by another part of the system.

For example, an installation may use a separate braking architecture or another regenerative-energy management method.

The important point is that the braking requirements should be established before the drive is ordered.

---

13. Cabinet Installation

The 20G14NF171JN0NNNNN is a large industrial drive.

Its approximate dimensions are:

430 mm W × 881.5 mm H × 349.6 mm D

Its approximate weight is:

72.6–108.9 kg

These dimensions should be considered during cabinet layout.

Cabinet Design Parameter	Requirement
Model / Part Number	20G14NF171JN0NNNNN
Frame	Frame 7
Width	Approximately 430 mm
Height	Approximately 881.5 mm
Depth	Approximately 349.6 mm
Weight	Approximately 72.6–108.9 kg
Mounting	Vertical
Mounting Structure	Heavy-duty support
Cooling	Adequate airflow
Cabinet	Required for open-type installation
Maintenance Space	Required
Cable Access	Must be planned
Heat Dissipation	Must be included in cabinet thermal design

Additional space should be allowed beyond the basic drive dimensions.

Cable routing, airflow, maintenance access, mounting hardware, and surrounding equipment can all increase the actual cabinet space required.

---

14. Environmental Considerations

Environmental Parameter	Specification / Consideration
Model / Part Number	20G14NF171JN0NNNNN
Operating Temperature	Approximately 0–50 °C
Relative Humidity	Approximately 5–95%, non-condensing
Storage Temperature	Approximately -40 to +70 °C
Cooling	Air Cooled
Enclosure	Open Type
Cabinet	Required
Condensation	Should be prevented
Dust	Controlled by overall enclosure design
Corrosive Atmosphere	Requires additional environmental evaluation
Ventilation	Required
Installation Environment	Industrial electrical cabinet

The drive’s open-type construction means that the overall cabinet must provide appropriate environmental protection.

The actual installation environment should be evaluated for dust, moisture, corrosive gases, temperature, altitude, vibration, and other factors.

---

15. Recommended Same-Series Models

The following five models are closely related 690 VAC PowerFlex 755 drives and provide useful alternatives when the required motor rating is different.

Model / Part Number	Voltage	Normal Duty	Heavy Duty	Frame	Dynamic Braking	Dimensions	Weight
20G14NF098JN0NNNNN	690 VAC, 3 PH	98 A / 90 kW	82 A / 75 kW	Frame 6	None	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF119JN0NNNNN	690 VAC, 3 PH	119 A / 110 kW	98 A / 90 kW	Frame 6	None	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF142JN0NNNNN	690 VAC, 3 PH	142 A / 132 kW	119 A / 110 kW	Frame 6	None	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF171JN0NNNNN	690 VAC, 3 PH	171 A / 160 kW	142 A / 132 kW	Frame 7	None	430 × 881.5 × 349.6 mm	72.6–108.9 kg
20G14NF212JN0NNNNN	690 VAC, 3 PH	212 A / 200 kW	171 A / 160 kW	Frame 7	None	430 × 881.5 × 349.6 mm	72.6–108.9 kg

The 20G14NF098JN0NNNNN is suitable for applications around the 90 kW Normal Duty class.

The 20G14NF119JN0NNNNN provides a 110 kW Normal Duty rating.

The 20G14NF142JN0NNNNN provides a 132 kW Normal Duty rating while remaining in Frame 6.

The 20G14NF171JN0NNNNN is the same 160 kW Normal Duty class as the main model covered here.

The 20G14NF212JN0NNNNN moves up to the 200 kW Normal Duty class.

---

16. Recommended JA0 Same-Series Models

For applications where the internal dynamic braking transistor is required, the JA0 configurations are useful alternatives.

Model / Part Number	Voltage	Normal Duty	Heavy Duty	Frame	Dynamic Braking	Dimensions	Weight
20G14NF098JA0NNNNN	690 VAC, 3 PH	98 A / 90 kW	82 A / 75 kW	Frame 6	DB transistor included	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF119JA0NNNNN	690 VAC, 3 PH	119 A / 110 kW	98 A / 90 kW	Frame 6	DB transistor included	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF142JA0NNNNN	690 VAC, 3 PH	142 A / 132 kW	119 A / 110 kW	Frame 6	DB transistor included	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF171JA0NNNNN	690 VAC, 3 PH	171 A / 160 kW	142 A / 132 kW	Frame 7	DB transistor included	430 × 881.5 × 349.6 mm	72.6–108.9 kg
20G14NF212JA0NNNNN	690 VAC, 3 PH	212 A / 200 kW	171 A / 160 kW	Frame 7	DB transistor included	430 × 881.5 × 349.6 mm	72.6–108.9 kg

These models are particularly relevant when the application requires an internal dynamic braking transistor.

The motor power and Frame progression remain similar, while the braking configuration changes.

---

17. 690 VAC PowerFlex 755 Rating Comparison

The following table shows the position of the 20G14NF171JN0NNNNN within the broader 690 VAC PowerFlex 755 range.

Model / Part Number	Normal Duty Current	Normal Duty Power	Heavy Duty Current	Heavy Duty Power	Frame	Dimensions	Weight
20G14NF034JN0NNNNN	34 A	30 kW	30 A	22 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF046JN0NNNNN	46 A	37 kW	34 A	30 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF050JN0NNNNN	50 A	45 kW	46 A	37 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF061JN0NNNNN	61 A	55 kW	50 A	45 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF082JN0NNNNN	82 A	75 kW	61 A	55 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF098JN0NNNNN	98 A	90 kW	82 A	75 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF119JN0NNNNN	119 A	110 kW	98 A	90 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF142JN0NNNNN	142 A	132 kW	119 A	110 kW	Frame 6	308.0 × 665.5 × 346.4 mm	38.6 kg
20G14NF171JN0NNNNN	171 A	160 kW	142 A	132 kW	Frame 7	430 × 881.5 × 349.6 mm	72.6–108.9 kg
20G14NF212JN0NNNNN	212 A	200 kW	171 A	160 kW	Frame 7	430 × 881.5 × 349.6 mm	72.6–108.9 kg
20G14NF263JN0NNNNN	263 A	250 kW	212 A	200 kW	Frame 7	430 × 881.5 × 349.6 mm	72.6–108.9 kg

This comparison makes the position of the 171 A model easy to understand.

It is the first model in this particular 690 VAC rating progression to move into the larger Frame 7 mechanical platform.

The next step, the 212 A model, provides 200 kW Normal Duty capacity, while the 263 A model reaches the 250 kW Normal Duty class.

---

18. Five Popular Models From the Same Brand

The following five models represent useful and commonly selected products from the same brand’s broader drive portfolio.

Model / Part Number	Series	Voltage Class	Current / Power Class	Typical Application	Dimensions	Weight
25B-D017N114	PowerFlex 525	480 VAC class	17 A class / approximately 7.5 kW class	General machine control, pumps, fans, conveyors	Configuration dependent	Configuration dependent
25B-D024N114	PowerFlex 525	480 VAC class	24 A class / approximately 11 kW class	Machine automation and general motor control	Configuration dependent	Configuration dependent
25B-D030N114	PowerFlex 525	480 VAC class	30 A class / approximately 15 kW class	Pumps, fans, conveyors, industrial machinery	Configuration dependent	Configuration dependent
20G11NC5P0JA0NNNNN	PowerFlex 755	480 VAC class	50 A class / approximately 37–45 kW class	Large industrial motor control	Configuration dependent	Configuration dependent
20G11NC072JA0NNNNN	PowerFlex 755	480 VAC class	72 A class / approximately 55 kW class	Process machinery and heavy industrial equipment	Configuration dependent	Configuration dependent

For these models, the exact dimensions and weight depend on the specific catalog configuration.

They should therefore be treated as configuration-dependent values rather than using one generic mechanical size for all versions.

---

19. Comparison With Smaller Drive Classes

The 20G14NF171JN0NNNNN is intended for a very different power range from compact general-purpose drives.

Model / Part Number	Series	Approximate Power Class	Typical Role	Mechanical Class
25B-D017N114	PowerFlex 525	7.5 kW class	Small machine control	Compact
25B-D024N114	PowerFlex 525	11 kW class	General industrial control	Compact
25B-D030N114	PowerFlex 525	15 kW class	Pumps, fans, conveyors	Compact / Medium
20G11NC5P0JA0NNNNN	PowerFlex 755	37–45 kW class	Large industrial machinery	Medium / Large
20G11NC072JA0NNNNN	PowerFlex 755	55 kW class	Process and heavy machinery	Large
20G14NF171JN0NNNNN	PowerFlex 755	160 kW ND / 132 kW HD	High-power industrial motor control	Very Large

The 20G14NF171JN0NNNNN should therefore be selected for a substantially larger motor and load application.

Choosing a much larger drive than required can unnecessarily increase cabinet size, cost, and installation complexity.

---

20. Catalog Number Breakdown

The catalog number provides useful information about the basic drive configuration.

Catalog Number Section	General Meaning
20G	PowerFlex 755 drive
14	DC Input with Precharge configuration
NF	690 VAC-related drive configuration
171	171 A Normal Duty rating
J	Filtered / CM jumper installed configuration
N	No internal dynamic braking transistor
0	Blank / No HIM
NNNNN	No additional specified options

The 171 section is particularly important because it identifies the drive’s Normal Duty current class.

The J configuration indicates the filtering / CM jumper arrangement.

The N braking designation identifies the absence of the internal dynamic braking transistor.

The 0 indicates the blank / no-HIM configuration.

---

21. Application Selection Guide

Application	Suitability	Main Consideration
Large Conveyor	Excellent	High motor power and controlled speed
Bulk Material Handling	Excellent	High current and industrial construction
Large Pump	Excellent	Variable-speed process control
Large Fan	Excellent	Adjustable airflow
Large Blower	Excellent	High-power variable-speed operation
Industrial Process Machinery	Excellent	Flexible motor-speed control
Material Handling	Excellent	Controlled acceleration
Compressor	Good	Compressor-specific operating requirements
High-Inertia Load	Application-specific	Braking system must be evaluated
Hoist / Crane	Application-specific	Braking and safety requirements
Large Mixer	Good to Excellent	High-power motor control
Production Machinery	Excellent	Automation and network integration

---

22. Important Engineering Considerations

Before applying the 20G14NF171JN0NNNNN to a machine, several factors should be reviewed.

The motor’s rated voltage and full-load current should be compatible with the drive.

The actual load torque should also be examined.

A motor may have a power rating that appears suitable while still requiring a larger drive because of high starting current, high torque demand, or frequent overload conditions.

The acceleration and deceleration requirements are equally important.

Because this model does not include an internal dynamic braking transistor, applications with frequent rapid deceleration should receive particular attention.

The engineer should determine whether the machine needs an external braking solution or another method of managing regenerative energy.

---

23. Maintenance and Service Considerations

The 20G14NF171JN0NNNNN is intended for industrial service and should be installed in a cabinet that provides suitable protection and access.

Maintenance planning should include:

• Airflow inspection
• Cooling-system inspection
• Electrical connection inspection
• Cabinet cleanliness
• Cable condition
• Grounding condition
• Drive fault history
• Network communication status
• Braking-system condition where an external braking system is used

Keeping the cooling path clean is particularly important for an air-cooled drive.

Dust accumulation around ventilation paths can reduce cooling performance and increase operating temperature.

---

24. Advantages for System Integrators

For system integrators, the 20G14NF171JN0NNNNN offers a high-power platform that can be incorporated into a larger industrial control architecture.

The open-type construction provides flexibility in cabinet design.

The drive can be combined with PLCs, HMIs, circuit protection, disconnect equipment, industrial networking equipment, and other control hardware.

The blank / no-HIM configuration is especially convenient where the operator interface is located elsewhere.

The 690 VAC voltage class also makes the drive appropriate for large industrial motor systems.

---

25. Advantages for End Users

From an end-user perspective, the drive provides adjustable motor speed for large industrial machines.

This can improve process flexibility.

Instead of operating a large motor continuously at a fixed speed, the machine can operate at different speeds according to production requirements.

Controlled acceleration can reduce mechanical stress.

Network integration can make operating information available to the plant control system.

The high power rating also allows one drive platform to handle substantial motors that would be outside the range of many compact drives.

---

26. Final Mechanical Specification

Parameter	Final Value
Model / Part Number	20G14NF171JN0NNNNN
Frame	Frame 7
Enclosure	Open Type
Cooling	Air Cooled
Width	Approximately 430 mm
Height	Approximately 881.5 mm
Depth	Approximately 349.6 mm
Dimensions	430 × 881.5 × 349.6 mm
Weight	Approximately 72.6–108.9 kg
Installation	Vertical cabinet / panel mounting
Cabinet	Required
Ventilation	Required
Service Access	Required
Mounting Structure	Heavy-duty support recommended

---

27. Final Technical Specification

Parameter	Specification
Model / Part Number	20G14NF171JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Family	PowerFlex 750-Series
Product	PowerFlex Air-Cooled 755 AC Drive
Voltage	690 VAC
Phase	Three Phase
Input	DC Input with Precharge
Normal Duty Current	171 A
Normal Duty Power	160 kW
Heavy Duty Current	142 A
Heavy Duty Power	132 kW
Frame	Frame 7
Enclosure	Open Type
Cooling	Air Cooled
Filtering	Filtered
CM Jumper	Installed
Dynamic Braking	None
Internal DB Transistor	Not Included
Internal Braking Resistor	Not Included
HIM	Blank / No HIM
Network Capability	Embedded EtherNet/IP capability
Operating Temperature	Approximately 0–50 °C
Relative Humidity	Approximately 5–95%, non-condensing
Storage Temperature	Approximately -40 to +70 °C
Width	Approximately 430 mm
Height	Approximately 881.5 mm
Depth	Approximately 349.6 mm
Dimensions	430 × 881.5 × 349.6 mm
Weight	Approximately 72.6–108.9 kg
Mounting	Industrial cabinet / panel
Main Applications	Conveyors, pumps, fans, blowers, compressors, process machinery, material handling
Braking Configuration	No internal dynamic braking transistor

---

28. Final Product Assessment

The Allen-Bradley 20G14NF171JN0NNNNN is a high-power PowerFlex 755 AC drive intended for large industrial motor-control applications.

Its 690 VAC three-phase configuration, 171 A / 160 kW Normal Duty rating, and 142 A / 132 kW Heavy Duty rating make it suitable for substantial industrial motors and demanding machinery.

The Frame 7 air-cooled open-type construction provides a flexible solution for cabinet-based installations.

Its approximate dimensions of 430 × 881.5 × 349.6 mm and approximate weight range of 72.6–108.9 kg mean that mechanical support, cabinet size, ventilation, lifting, and service access should all be considered carefully during system design.

The defining difference between this model and the corresponding JA0 version is the braking configuration.

The 20G14NF171JN0NNNNN does not include an internal dynamic braking transistor.

That makes it particularly suitable for applications where dynamic braking is not required, or where regenerative energy is handled through another part of the system.

For applications involving high-inertia loads, frequent stopping, or rapid deceleration, the braking requirements should be evaluated before selecting the JN0 configuration.

The drive’s filtered configuration with CM jumper installed, combined with its blank / no-HIM configuration, makes it well suited to larger automated systems where drive operation is managed through centralized controls.

The model also sits at an important point in the 690 VAC PowerFlex 755 range. The lower 98 A, 119 A, and 142 A models remain in Frame 6, while the 171 A model moves into Frame 7. The 212 A and 263 A models then extend the range into even higher power levels.

Overall, the 20G14NF171JN0NNNNN is a strong choice for large industrial motor applications requiring high power, 690 VAC operation, cabinet-based installation, variable-speed control, industrial automation integration, and a drive configuration without an internal dynamic braking transistor.