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Allen-Bradley 20F14NF020JN0NNNNN — Detailed Product Specifications, Product Introduction, Applications, Advantages and Recommended Models
1. Product Overview
The 20F14NF020JN0NNNNN is an industrial PowerFlex 753 AC drive designed for high-voltage motor-control applications.
It is a 690 VAC, three-phase, air-cooled, open-type Frame 6 drive with a 20 A output rating. The drive is rated at 15 kW under Normal Duty and 11 kW under Heavy Duty, making it suitable for a broad range of medium-power industrial motors.
The model uses a DC input with precharge and is intended for a common-DC-bus architecture. This makes it particularly useful in industrial systems where multiple drives operate from a shared DC power system rather than each drive operating as an entirely independent AC-input unit.
The particular configuration represented by the catalog number includes filtering, the common-mode capacitor jumper installed, no internal dynamic-braking transistor, and a blank/no-HIM configuration.
With its 20 A output capacity and 15 kW Normal-Duty rating, this model sits above the 12 A and 15 A versions of the same family and is a useful choice when the application requires additional current capacity without moving to a much larger frame.
The product is suitable for industrial applications such as conveyors, pumps, fans, blowers, mixers, compressors, process machinery, material-handling equipment and automated production systems.
2. Brand and Product Series
| Item | Specification |
|---|---|
| Brand | Allen-Bradley |
| Product Family | PowerFlex 750-Series |
| Product Series | PowerFlex 753 |
| Product Type | AC Variable Frequency Drive |
| Model | 20F14NF020JN0NNNNN |
| Drive Type | PowerFlex 753 AC Packaged Drive |
| Cooling Method | Air Cooled |
| Enclosure | Open Type |
| Frame Size | Frame 6 |
| Voltage Class | 690 VAC |
| Phase | Three Phase |
| Output Current | 20 A |
| Normal-Duty Power | 15 kW |
| Heavy-Duty Power | 11 kW |
| Input Type | DC Input with Precharge |
| DC-Bus Voltage | 932 VDC nominal |
| Architecture | Common DC Bus |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| Internal Dynamic-Braking Transistor | Not Included |
| HIM | Blank / No HIM |
| Cooling | Air Cooled |
| Approx. Weight | 14.51 kg |
| Approx. Length | 781 mm / 30.75 in |
| Width | Refer to applicable dimensional drawing |
| Depth | Refer to applicable dimensional drawing |
| Installation | Industrial Electrical Cabinet |
| Typical Application | Medium-Power Industrial Motor Control |
The 20 A, 15 kW Normal-Duty and 11 kW Heavy-Duty ratings, together with the Frame 6 and 690 VAC characteristics, are consistent across the technical product information for this catalog number.
3. Detailed Technical Parameters
| Parameter | Specification |
|---|---|
| Model | 20F14NF020JN0NNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 753 |
| Product Family | PowerFlex 750-Series |
| Product Type | AC Variable Frequency Drive |
| Voltage Class | 690 VAC |
| Phase | Three Phase |
| Nominal DC Input | 932 VDC |
| Input Architecture | Common DC Bus |
| Input Type | DC Input with Precharge |
| Normal-Duty Continuous Current | 20 A |
| Normal-Duty 60-Second Current | 22 A |
| Normal-Duty 3-Second Current | 30 A |
| Normal-Duty Power | 15 kW |
| Heavy-Duty Continuous Current | 15 A |
| Heavy-Duty 60-Second Current | 22.5 A |
| Heavy-Duty 3-Second Current | 30 A |
| Heavy-Duty Power | 11 kW |
| Frame Size | Frame 6 |
| Enclosure | Open Type |
| Cooling | Air Cooled |
| Filtering | Filtered |
| Common-Mode Capacitor Jumper | Installed |
| Dynamic Braking | None |
| Internal Braking Transistor | No |
| HIM | Blank / No HIM |
| Approx. Weight | 14.51 kg |
| Approx. Length | 781 mm |
| Approx. Length | 30.75 in |
| Approx. Width | See applicable dimensional drawing |
| Approx. Depth | See applicable dimensional drawing |
| Installation | Panel / Cabinet |
| Typical Normal-Duty Motor Range | Up to approximately 15 kW |
| Typical Heavy-Duty Motor Range | Up to approximately 11 kW |
The current and power ratings are listed as 20 A / 15 kW Normal Duty and 15 A / 11 kW Heavy Duty, with short-term ratings of 22 A and 30 A for Normal Duty and 22.5 A and 30 A for Heavy Duty.
The commonly listed physical weight is approximately 14.51 kg, while the overall length is approximately 30.75 inches, or 781 mm.
For width and depth, it is better not to substitute an estimated figure for the manufacturer’s mechanical drawing. Cabinet construction should use the dimensional drawing for the actual revision and installation arrangement.
4. Electrical Rating
The electrical rating is one of the most important aspects of the 20F14NF020JN0NNNNN.
Under Normal-Duty operation, the drive provides 20 A continuous output current and is rated for 15 kW.
Under Heavy-Duty operation, the continuous rating is 15 A, corresponding to an 11 kW power rating.
| Duty | Continuous Current | 60-Second Current | 3-Second Current | Power Rating |
|---|---|---|---|---|
| Normal Duty | 20 A | 22 A | 30 A | 15 kW |
| Heavy Duty | 15 A | 22.5 A | 30 A | 11 kW |
The distinction between Normal Duty and Heavy Duty should be taken seriously during drive selection.
A motor should not be selected simply because its nameplate says 15 kW.
The motor’s actual full-load current, starting torque, acceleration requirements, load profile and overload requirements should all be considered.
For a relatively smooth variable-torque load, the Normal-Duty rating may be appropriate.
For a machine with frequent acceleration, high starting torque or mechanical shock, the Heavy-Duty rating becomes more important.
5. Voltage and Power System
The drive belongs to the 690 VAC class and is designed around a 932 VDC nominal common-bus input.
This makes it quite different from compact 230 VAC or 480 VAC variable-frequency drives.
The high-voltage architecture is particularly relevant to industrial plants and machines that use 690 V motors.
Higher motor voltage can reduce current for a given power level, which can provide advantages in large industrial power-distribution systems.
Potential benefits include:
- Reduced current
- Lower conductor losses
- Reduced voltage drop
- Efficient power distribution
- More practical long-distance motor connections
- Better suitability for industrial high-power systems
The actual motor voltage must always be compatible with the drive and the plant electrical system.
6. Common-DC-Bus Architecture
One of the most distinctive features of this model is its DC-input/common-bus configuration.
A conventional standalone variable-frequency drive generally accepts AC power and internally converts that power into a DC bus.
A common-bus drive instead receives power from a DC power architecture that can be shared among multiple drive sections.
This type of architecture can be particularly useful in machinery containing several motors.
For example, one motor may be accelerating while another is decelerating.
Depending on the system design, energy can be managed through the common DC system rather than treating every drive as a completely isolated unit.
Common-bus architecture is therefore attractive for:
- Multi-drive machines
- Material-handling systems
- Production lines
- Conveyor systems
- Winding machinery
- Unwinding machinery
- Process equipment
- Coordinated motor systems
- Large automated machinery
7. Precharge Function
The catalog configuration specifies DC input with precharge.
Precharge is an important part of a high-voltage DC-bus system because it helps manage the initial charging of the DC-link capacitors.
Without appropriate precharge management, the initial connection of a high-voltage DC source could result in an excessive inrush current.
The precharge arrangement therefore forms an important part of the drive’s electrical architecture.
When integrating the drive into an existing common-bus system, the DC-bus voltage, precharge arrangement, disconnecting method and protection system must all be considered together.
8. Filtering and Common-Mode Capacitor Configuration
The 20F14NF020JN0NNNNN is specified as a filtered configuration with the common-mode capacitor jumper installed.
This is an important detail when selecting or replacing the drive.
Filtering can help reduce unwanted high-frequency electrical noise and improve electromagnetic compatibility within the overall industrial installation.
However, the drive filter is only one part of the EMC design.
The following factors remain important:
- Motor cable length
- Cable shielding
- Grounding
- Cabinet construction
- Cable routing
- Separation between power and control wiring
- Motor characteristics
- Other switching equipment
A properly designed installation is therefore required to obtain the full benefit of the filtering configuration.
9. Dynamic Braking Configuration
This model does not include an internal dynamic-braking transistor.
That is an important selection point.
When a motor decelerates, its mechanical energy can flow back toward the drive.
If the machine needs very rapid deceleration, that energy needs to be managed correctly.
Applications requiring special braking consideration may include:
- High-inertia conveyors
- Centrifuges
- Large fans
- Rollers
- Winders
- Unwinders
- High-speed machinery
- Rapid-stop production equipment
Because this particular catalog configuration does not include the internal braking transistor, an external braking strategy may be required when the application demands it.
10. HIM Configuration
The model is supplied in a blank/no-HIM configuration.
HIM refers to the Human Interface Module used for local drive interaction.
The absence of a standard HIM is not necessarily a disadvantage.
In a modern automated machine, the drive may be controlled from:
- A PLC
- A centralized HMI
- An operator station
- An industrial network
- A supervisory control system
For such systems, a permanently installed local keypad may not be necessary.
The no-HIM configuration can therefore be a practical choice for machine builders and system integrators.
11. Product Introduction
The 20F14NF020JN0NNNNN is designed to provide controlled speed and torque for three-phase AC motors.
Instead of operating a motor only at the speed determined by the fixed incoming electrical frequency, the drive can vary the motor operating frequency and voltage.
This allows the machine to operate at different speeds according to production requirements.
The practical result is much greater control over the motor.
The drive can provide controlled acceleration.
It can provide controlled deceleration.
It can maintain a selected speed.
It can respond to external speed references.
It can provide operating information.
It can detect certain abnormal conditions.
It can also become part of a larger automated machine-control architecture.
12. Motor-Control Functions
The PowerFlex 753 platform is designed for industrial motor-control applications requiring more flexibility than a basic general-purpose inverter.
Depending on the complete system configuration, the platform can support control approaches such as:
| Control Function | Typical Purpose |
|---|---|
| V/Hz Control | Basic motor-speed control |
| Sensorless Vector Control | Improved speed and torque control |
| Vector Control | Higher-performance motor applications |
| Speed Control | Precise operating-speed regulation |
| Torque Control | Torque-sensitive applications |
| Feedback-Based Control | Applications requiring motor feedback |
| Position-Oriented Control | Specialized machine applications |
The exact control strategy should be selected according to the motor type and mechanical load.
13. Product Applications
13.1 Conveyor Systems
Conveyors are one of the most practical applications for this drive.
A conveyor motor does not always need to operate at maximum speed.
The drive can provide different speeds according to production requirements.
It can also provide controlled acceleration.
This can reduce mechanical stress on:
- Conveyor belts
- Gearboxes
- Couplings
- Shafts
- Bearings
- Rollers
- Mechanical structures
A controlled stop can also reduce sudden movement of materials.
For larger conveyors, the 20 A / 15 kW Normal-Duty rating can provide a useful capacity margin compared with smaller PowerFlex 753 models.
14. Pump Applications
The drive can be used for appropriately sized industrial pump systems.
Pump speed can be adjusted according to:
- Flow
- Pressure
- Process demand
- Tank level
- Cooling demand
- Production requirements
Typical applications include:
- Process-water pumps
- Cooling-water pumps
- Circulation pumps
- Filtration systems
- Wastewater systems
- Industrial utility systems
For variable-torque centrifugal pumps, reducing motor speed can also reduce power consumption significantly.
15. Fan and Blower Applications
Fans and blowers are another strong application area.
Industrial ventilation systems often do not need maximum airflow at all times.
The drive can adjust fan speed according to:
- Temperature
- Pressure
- Airflow
- Production rate
- Furnace requirements
- Ventilation demand
Applications include:
- Industrial ventilation
- Dust extraction
- Furnace exhaust
- Cooling systems
- Air-handling systems
- Process exhaust
For variable-torque loads, the ability to reduce speed can provide significant energy-saving potential.
16. Mixer and Agitator Applications
Mixers and agitators can have substantial torque requirements.
The load may change significantly as the tank fills or the material changes consistency.
The drive allows the motor to accelerate smoothly and operate at a selected speed.
Typical applications include:
- Chemical mixing
- Food processing
- Paint production
- Plastics
- Water treatment
- Building-material production
- Industrial process equipment
Different production stages can use different motor speeds.
17. Compressor Applications
The 20F14NF020JN0NNNNN can also be used with suitably rated compressor systems.
Controlled acceleration can reduce mechanical stress during startup.
Applications may include:
- Industrial compressed-air systems
- Process compressors
- Manufacturing utilities
- Process-gas equipment
- Refrigeration-related machinery
Compressor loads should be evaluated carefully because starting torque and acceleration requirements can be significantly different from those of a simple fan.
18. Material-Handling Applications
Material-handling systems can benefit from controlled motor speed.
Applications include:
- Feeders
- Rollers
- Conveyors
- Transfer systems
- Sorting systems
- Packaging machinery
- Production lines
The drive can allow different sections of a machine to operate at coordinated speeds.
This is particularly valuable when several motors must work together.
19. Process Machinery
The PowerFlex 753 platform can be used in a wide range of process machinery.
Examples include:
- Extrusion equipment
- Mixing equipment
- Material-processing machinery
- Industrial rollers
- Production equipment
- Packaging machinery
- Manufacturing lines
The ability to change speed according to process requirements can improve product consistency and reduce mechanical stress.
20. Main Product Advantages
20.1 20 A Output Capacity
The 20 A output rating gives this model more capacity than the 12 A and 15 A versions of the same 690 V common-bus series.
This makes it useful when the motor current is too high for the smaller models but does not justify moving to a substantially larger drive.
20.2 15 kW Normal-Duty Rating
The 15 kW Normal-Duty rating makes this model suitable for a substantial range of medium-power industrial motors.
This is particularly useful for:
- Pumps
- Fans
- Conveyors
- Mixers
- Process machinery
The actual motor full-load current remains the key selection criterion.
20.3 11 kW Heavy-Duty Rating
The 11 kW Heavy-Duty rating provides a useful capacity level for applications with greater torque demands.
Heavy-duty sizing is particularly relevant when the machine frequently accelerates under load or experiences significant mechanical resistance.
20.4 690 VAC Operation
The high-voltage rating makes the model suitable for industrial systems based on 690 V motors.
This can be particularly valuable in manufacturing plants and large machines where high-voltage motor distribution is already established.
20.5 Common-Bus Capability
The common-bus architecture is one of the most valuable features for multi-drive systems.
It allows the drive to participate in a shared DC power architecture.
This can provide system-level advantages that are not available from a collection of completely independent AC-input drives.
20.6 Frame 6 Construction
Frame 6 provides a useful balance between electrical capacity and physical size.
The drive is large enough for medium-power industrial applications but remains considerably more manageable than the higher-current Frame 7 configurations.
20.7 Air-Cooled Construction
Air cooling is a practical solution for industrial cabinets.
It simplifies the cooling system compared with liquid-cooled equipment.
Proper airflow and heat dissipation remain essential.
20.8 Filtered Configuration
The filtered configuration helps with electromagnetic compatibility and electrical-noise management.
This is particularly useful in cabinets containing several electronic devices.
20.9 No-HIM Configuration
The blank/no-HIM configuration is useful for automated machinery.
The drive can be managed through the machine’s central control system rather than relying on a local keypad.
21. Dimensions and Weight
The physical size of the drive is an important consideration during cabinet design.
The commonly listed overall length is approximately 30.75 inches, or 781 mm.
The listed drive weight is approximately 32 lb, or 14.51 kg.
| Mechanical Parameter | Approximate Value |
|---|---|
| Frame | Frame 6 |
| Enclosure | Open Type |
| Cooling | Air Cooled |
| Overall Length | 781 mm |
| Overall Length | 30.75 in |
| Weight | 14.51 kg |
| Weight | Approx. 32 lb |
| Width | Use applicable dimensional drawing |
| Depth | Use applicable dimensional drawing |
| Mounting | Panel / Cabinet |
| Cabinet Requirement | Suitable industrial enclosure |
For width and depth, an exact value should not be guessed because the actual mechanical envelope can depend on the specific frame arrangement, mounting configuration and associated accessories.
For a production cabinet, the correct dimensional drawing should therefore be used.
The 14.51 kg weight is useful for preliminary mechanical design, lifting considerations and cabinet mounting calculations.
22. Installation Considerations
Because this is an open-type Frame 6 drive, it is normally installed inside a suitable electrical enclosure.
The enclosure should protect the drive from:
- Dust
- Moisture
- Corrosive atmosphere
- Mechanical contamination
- Excessive temperature
- Uncontrolled airflow
The cabinet should also provide sufficient space for:
- Power connections
- DC-bus wiring
- Motor wiring
- Control wiring
- Grounding
- Cooling airflow
- Maintenance access
The drive’s 781 mm overall length should be considered when planning the vertical cabinet layout.
It is also important to avoid placing heat-sensitive equipment immediately next to or above the drive without considering the heat generated during operation.
23. Environmental Considerations
Industrial drive performance depends heavily on the surrounding environment.
Particular attention should be paid to:
| Environmental Factor | Consideration |
|---|---|
| Temperature | Must remain within the applicable drive rating |
| Humidity | Avoid condensation |
| Dust | Prevent excessive accumulation |
| Corrosive Gas | Avoid corrosive atmospheres |
| Vibration | Provide appropriate mechanical mounting |
| Airflow | Maintain sufficient cooling |
| Altitude | Check applicable derating requirements |
| Cabinet Temperature | Must remain within allowable limits |
A clean and properly ventilated control cabinet can significantly improve long-term reliability.
24. Motor Selection
When pairing the drive with a motor, the following parameters should be checked:
| Motor Parameter | Selection Consideration |
|---|---|
| Motor Voltage | Must be compatible with 690 V system |
| Motor Current | Must be within drive rating |
| Motor Power | Consider ND or HD rating |
| Motor Frequency | Must match control requirements |
| Motor Type | Induction or applicable supported motor type |
| Starting Torque | Evaluate application requirements |
| Running Torque | Evaluate continuously |
| Acceleration | Check drive capability |
| Deceleration | Check braking requirements |
| Motor Cable | Check length and EMC requirements |
| Feedback | Required if closed-loop control is used |
Motor horsepower or kilowatt rating alone should never be used as the only selection criterion.
25. Normal-Duty Versus Heavy-Duty Selection
| Application Characteristic | More Suitable Rating |
|---|---|
| Centrifugal Pump | Normal Duty often appropriate |
| Industrial Fan | Normal Duty often appropriate |
| Blower | Normal Duty often appropriate |
| Conveyor with Smooth Load | Normal Duty may be appropriate |
| Conveyor with Heavy Starting Load | Heavy Duty may be required |
| Mixer | Heavy Duty may be required |
| High-Inertia Machinery | Heavy Duty / braking analysis |
| Rapid Acceleration | Heavy Duty may be preferred |
| Shock Load | Heavy Duty |
| Constant-Torque Machinery | Carefully evaluate Heavy Duty |
This table is a general selection guide.
The actual application should always be evaluated from the motor’s current requirements and the mechanical load profile.
26. Five Recommended Models from the Same Series
The following models are useful related choices within the same 690 V PowerFlex 753 common-bus family.
| Model | Voltage | ND Current | ND Power | HD Current | HD Power | Frame | Approx. Weight | Approx. Dimensions |
|---|---|---|---|---|---|---|---|---|
| 20F14NF012JN0NNNNN | 690 VAC | 12 A | 7.5 kW | 9 A | 5.5 kW | 6 | Approx. 14.5 kg | Approx. Frame 6 |
| 20F14NF015JN0NNNNN | 690 VAC | 15 A | 11 kW | 12 A | 7.5 kW | 6 | Approx. 14.5 kg class | Approx. Frame 6 |
| 20F14NF023JN0NNNNN | 690 VAC | 23 A | 18.5 kW | 20 A | 15 kW | 6 | Frame-dependent | Frame 6 |
| 20F14NF030JN0NNNNN | 690 VAC | 30 A | 22 kW | 23 A | 18.5 kW | 6 | Frame-dependent | Frame 6 |
| 20F14NF034JN0NNNNN | 690 VAC | 34 A | 30 kW | 30 A | 22 kW | 6 | Frame-dependent | Frame 6 |
The technical rating progression for the 690 V common-bus models is 12 A, 15 A, 20 A, 23 A, 30 A and 34 A, with corresponding Normal-Duty and Heavy-Duty power ratings.
For a direct step down from the 20 A model, 20F14NF015JN0NNNNN is the most obvious smaller-capacity option.
For a step up, 20F14NF023JN0NNNNN provides the next higher current rating in the same group.
27. Same-Series Model Comparison
| Model | Normal Duty | Heavy Duty | Relative Capacity | Typical Use |
|---|---|---|---|---|
| 20F14NF012JN0NNNNN | 12 A / 7.5 kW | 9 A / 5.5 kW | Lower | Smaller 690 V motors |
| 20F14NF015JN0NNNNN | 15 A / 11 kW | 12 A / 7.5 kW | Lower | Medium-small industrial motors |
| 20F14NF020JN0NNNNN | 20 A / 15 kW | 15 A / 11 kW | Reference | Medium industrial motors |
| 20F14NF023JN0NNNNN | 23 A / 18.5 kW | 20 A / 15 kW | Higher | Larger process loads |
| 20F14NF030JN0NNNNN | 30 A / 22 kW | 23 A / 18.5 kW | Higher | Larger industrial machinery |
| 20F14NF034JN0NNNNN | 34 A / 30 kW | 30 A / 22 kW | Highest in this group | Larger 690 V motors |
28. Five Popular Related Models from the Same Brand
For applications where a 690 V common-bus drive is not required, other drive families can be considered.
| Model | Series | Voltage Class | Approx. Current | Approx. Power | Typical Application | Approx. Weight | Approx. Dimensions |
|---|---|---|---|---|---|---|---|
| 20G14NE242AN0NNNNN | PowerFlex 755 | 600 VAC | 242 A | 250 HP ND / 200 HP HD | Large industrial machinery | Approx. Frame 7 class | Large Frame 7 |
| 25B-D024N114 | PowerFlex 525 | 480 VAC class | Approx. 24 A | Approx. 10 HP | Compact industrial machines | Approx. 4–6 kg | Compact |
| 25B-D010N114 | PowerFlex 525 | 480 VAC class | Approx. 10 A | Approx. 5 HP | Small pumps, fans and conveyors | Approx. 3–5 kg | Compact |
| 25C-D022N104 | PowerFlex 527 | 480 VAC class | Approx. 22 A | Approx. 10 HP | PLC-based machine control | Approx. 4–7 kg | Compact |
| 22B-D017N104 | PowerFlex 40 | 480 VAC class | Approx. 17 A | Approx. 7.5 HP | General-purpose motor control | Approx. 3–5 kg | Compact |
These models are related alternatives rather than direct electrical replacements.
The voltage, input configuration, frame size, motor rating, communications architecture and cabinet dimensions should all be checked before selecting one as an alternative.
29. PowerFlex 755 as a Higher-Capacity Alternative
For larger machinery, the PowerFlex 755 family provides a logical alternative.
It is intended for applications where greater drive capacity and more advanced system functionality may be required.
Compared with the 20F14NF020JN0NNNNN, a PowerFlex 755 solution may provide a better fit when the machine has:
- Large motors
- Multiple control axes
- More complex automation
- Extensive feedback requirements
- Advanced communication requirements
- Large process machinery
The 20F14NF020JN0NNNNN remains a more natural choice when the application specifically calls for a 690 V common-bus PowerFlex 753 configuration.
30. PowerFlex 525 as a Compact Alternative
The PowerFlex 525 is a much smaller drive family.
It is more appropriate for applications such as:
- Small conveyors
- Small pumps
- Small fans
- Packaging equipment
- Small machine tools
- Compact machinery
The physical size can be a major advantage when cabinet space is limited.
However, it should not be treated as a direct replacement for the 690 V common-bus 20F14NF020JN0NNNNN.
The electrical system must be redesigned or confirmed to be compatible.
31. PowerFlex 527 as a Machine-Control Alternative
The PowerFlex 527 is particularly relevant to machine builders using PLC-centered automation.
It can be attractive when the application emphasizes:
- Integrated machine control
- Networked drive control
- Compact cabinet construction
- PLC-based programming
- Coordinated machine operation
For a machine requiring the 690 V common-bus architecture, however, the PowerFlex 753 configuration remains the more appropriate family.
32. Advantages for Machine Builders
For machine builders, the 20F14NF020JN0NNNNN provides a standardized industrial drive platform that can be used across different machine sections.
This can simplify:
- Electrical engineering
- Parameter setup
- Commissioning
- Maintenance
- Troubleshooting
- Spare-parts planning
- Operator training
The common-bus design can also be advantageous when multiple drive sections need to share a coordinated power architecture.
33. Advantages for System Integrators
For system integrators, one of the main benefits is the flexibility of the PowerFlex 753 platform.
The same family covers a range of current and power levels.
This makes it easier to standardize drive selection across a plant.
A plant may use a smaller model for one pump, the 20 A model for a conveyor, and a larger model for a high-capacity process motor while maintaining a similar overall drive platform.
This can reduce engineering complexity.
34. Energy Efficiency
The drive can provide energy-saving benefits depending on the application.
For variable-torque loads such as pumps and fans, reducing speed can significantly reduce power consumption.
For constant-torque loads, the primary advantages are usually:
- Controlled speed
- Controlled acceleration
- Controlled deceleration
- Improved process control
- Reduced mechanical stress
- Better production consistency
The actual energy savings depend on the machine’s operating profile.
35. Diagnostic and Maintenance Benefits
Industrial drives can provide useful operating information during commissioning and maintenance.
Depending on the overall configuration, technicians can monitor information such as:
- Output current
- Output frequency
- Drive status
- Fault status
- Warning status
- DC-bus voltage
- Drive temperature
- Motor speed
- Load conditions
- Communication status
This makes troubleshooting more systematic.
Instead of simply replacing components, technicians can compare the drive’s operating information with the expected behavior of the motor and machine.
36. Common Troubleshooting Areas
When a motor system does not operate correctly, the drive should not automatically be assumed to be defective.
A practical troubleshooting sequence should include:
- Check the DC-bus supply.
- Check the precharge system.
- Check the motor nameplate information.
- Check motor cable connections.
- Check motor insulation.
- Check the mechanical load.
- Check acceleration settings.
- Check deceleration settings.
- Check current limits.
- Check control references.
- Check communication signals.
- Review fault and warning history.
- Check cabinet temperature.
- Check cooling airflow.
This approach can help distinguish between electrical, mechanical, configuration and communication problems.
37. Cabinet Design Considerations
The 781 mm overall length should be included in cabinet layout calculations.
However, the cabinet should not be designed around the drive body alone.
Additional space may be needed for:
- Power cables
- DC-bus cables
- Motor cables
- Control wiring
- Grounding conductors
- Ventilation
- Service access
- Cable bending radius
The drive’s approximately 14.51 kg weight should also be considered when selecting the mounting plate.
A rigid mounting surface is particularly important for industrial equipment that experiences vibration.
38. Cooling Considerations
Because the drive is air cooled, airflow is an important part of the installation.
The following should be considered:
| Cooling Factor | Importance |
|---|---|
| Cabinet Airflow | High |
| Ambient Temperature | High |
| Internal Cabinet Temperature | High |
| Drive Spacing | Important |
| Fan Condition | Important |
| Dust Accumulation | Important |
| Heat from Other Drives | Important |
| Cabinet Ventilation | Important |
If several drives are installed in the same cabinet, their combined heat generation must be considered.
A drive that operates reliably in an individual cabinet may require additional cooling when several drives are installed together.
39. Application Selection Guide
| Application | Suggested Model | Main Reason |
|---|---|---|
| Smaller 690 V motor | 20F14NF012JN0NNNNN | Lower current requirement |
| Medium 690 V motor | 20F14NF015JN0NNNNN | 15 A / 11 kW ND |
| 690 V motor around 15 kW | 20F14NF020JN0NNNNN | 20 A / 15 kW ND |
| Larger 690 V motor | 20F14NF023JN0NNNNN | 23 A / 18.5 kW ND |
| Higher-power process equipment | 20F14NF030JN0NNNNN | 30 A / 22 kW ND |
| Large 690 V motor | 20F14NF034JN0NNNNN | 34 A / 30 kW ND |
| Compact 480 V machine | 25B-D010N114 | Smaller physical package |
| Medium compact machine | 25B-D024N114 | Higher compact-drive capacity |
| Large industrial machine | 20G14NE242AN0NNNNN | High-capacity drive family |
40. Replacement Checklist
When replacing an existing 20F14NF020JN0NNNNN, the following should be checked carefully.
| Check Item | Requirement |
|---|---|
| Model | 20F14NF020JN0NNNNN |
| Voltage | 690 VAC class |
| DC Bus | 932 VDC nominal |
| Continuous ND Current | 20 A |
| ND Power | 15 kW |
| HD Current | 15 A |
| HD Power | 11 kW |
| Input | DC with precharge |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| HIM | Blank / No HIM |
| Frame | 6 |
| Enclosure | Open Type |
| Cooling | Air Cooled |
| Approx. Weight | 14.51 kg |
| Approx. Length | 781 mm |
| Width / Depth | Verify with mechanical drawing |
| Motor | Verify voltage and full-load current |
| Cabinet | Verify available space and cooling |
| Braking | Verify external braking requirements |
A replacement should match the complete electrical and mechanical configuration rather than simply matching the motor’s nominal kW rating.
41. Five Same-Series Models — Detailed Comparison
| Model | Voltage | ND Current | ND Power | HD Current | HD Power | Frame | Main Advantage |
|---|---|---|---|---|---|---|---|
| 20F14NF012JN0NNNNN | 690 VAC | 12 A | 7.5 kW | 9 A | 5.5 kW | 6 | Smaller capacity |
| 20F14NF015JN0NNNNN | 690 VAC | 15 A | 11 kW | 12 A | 7.5 kW | 6 | Medium-small motor applications |
| 20F14NF020JN0NNNNN | 690 VAC | 20 A | 15 kW | 15 A | 11 kW | 6 | Balanced medium-power solution |
| 20F14NF023JN0NNNNN | 690 VAC | 23 A | 18.5 kW | 20 A | 15 kW | 6 | Higher current capacity |
| 20F14NF030JN0NNNNN | 690 VAC | 30 A | 22 kW | 23 A | 18.5 kW | 6 | Larger process applications |
These ratings follow the published common-bus PowerFlex 753 rating progression.
42. Why Choose the 20F14NF020JN0NNNNN?
The strongest reason to choose this model is the combination of 20 A current capacity and 15 kW Normal-Duty power within a 690 V common-bus Frame 6 configuration.
The 12 A model may be insufficient for a 15 kW-class motor.
The 15 A model may also be too small depending on the motor’s full-load current.
The 20 A version provides the next step in capacity without immediately moving to a substantially larger drive configuration.
For a medium-power industrial machine, this can make it a practical balance between electrical capacity, physical size and system architecture.
43. Product Strengths Summary
| Strength | Practical Benefit |
|---|---|
| 690 VAC | Suitable for high-voltage industrial motors |
| 20 A Output | More capacity than smaller models |
| 15 kW ND | Suitable for medium-power applications |
| 11 kW HD | Useful for higher-torque applications |
| Common DC Bus | Good for multi-drive systems |
| Precharge | Appropriate for high-voltage DC architecture |
| Frame 6 | Balanced physical size |
| Air Cooled | Practical industrial cooling |
| Filtered | Better electrical-noise management |
| CM Jumper Installed | Defined EMC configuration |
| No Internal Brake Transistor | Clear external braking consideration |
| No HIM | Suitable for PLC-controlled machinery |
| Industrial Platform | Suitable for demanding automation systems |
| Diagnostic Capability | Helps maintenance and commissioning |
44. Complete Parameter Summary
| Category | Detailed Specification |
|---|---|
| Model | 20F14NF020JN0NNNNN |
| Brand | Allen-Bradley |
| Series | PowerFlex 753 |
| Family | PowerFlex 750-Series |
| Product Type | AC Variable Frequency Drive |
| Voltage | 690 VAC |
| Phase | Three Phase |
| Nominal DC Input | 932 VDC |
| Input Architecture | Common DC Bus |
| Input Type | DC Input with Precharge |
| Normal-Duty Current | 20 A |
| Normal-Duty 60-Second Current | 22 A |
| Normal-Duty 3-Second Current | 30 A |
| Normal-Duty Power | 15 kW |
| Heavy-Duty Current | 15 A |
| Heavy-Duty 60-Second Current | 22.5 A |
| Heavy-Duty 3-Second Current | 30 A |
| Heavy-Duty Power | 11 kW |
| Frame | 6 |
| Enclosure | Open Type |
| Cooling | Air Cooled |
| Filtering | Filtered |
| CM Jumper | Installed |
| Dynamic Braking | None |
| Internal Braking Transistor | None |
| HIM | Blank / No HIM |
| Approx. Weight | 14.51 kg |
| Approx. Length | 781 mm |
| Approx. Length | 30.75 in |
| Width | Verify actual dimensional drawing |
| Depth | Verify actual dimensional drawing |
| Installation | Industrial Cabinet / Panel |
| Typical Applications | Pumps, fans, conveyors, mixers, compressors, process machinery |
| Main Advantage | 690 V / 20 A common-bus motor control |
45. Final Product Assessment
The 20F14NF020JN0NNNNN is a strong medium-power industrial drive within the PowerFlex 753 family.
Its 20 A Normal-Duty output, 15 kW Normal-Duty rating, 15 A Heavy-Duty output, and 11 kW Heavy-Duty rating give it a useful position between the smaller 12 A and 15 A models and the higher-current 23 A, 30 A and larger configurations.
The 690 VAC voltage class makes it particularly relevant to high-voltage industrial motor systems.
The 932 VDC common-bus architecture gives it an additional advantage for multi-drive machinery and industrial systems designed around shared DC power.
The Frame 6 air-cooled construction provides a practical balance between capacity and cabinet space.
The approximate 14.51 kg weight is manageable for industrial cabinet installation, while the approximately 781 mm length is an important factor when designing the enclosure.
The filtered configuration and installed CM jumper should be taken into account when designing the electrical system.
The absence of an internal dynamic-braking transistor should also be considered carefully if the machine requires rapid deceleration.
The blank/no-HIM configuration makes the drive particularly suitable for automated machinery where local operation is handled by a PLC, HMI or centralized control system.
46. Conclusion
The 20F14NF020JN0NNNNN is best suited to industrial applications requiring a 690 VAC, three-phase, 20 A PowerFlex 753 common-bus AC drive.
Its 15 kW Normal-Duty capacity makes it suitable for medium-power motors, while the 11 kW Heavy-Duty rating provides a useful reference for higher-torque applications.
Its strongest technical characteristics include:
- 690 VAC operation
- 932 VDC nominal common-bus input
- 20 A Normal-Duty output
- 15 kW Normal-Duty capacity
- 15 A Heavy-Duty output
- 11 kW Heavy-Duty capacity
- Frame 6 construction
- Air cooling
- Open enclosure
- Filtered configuration
- Common-mode capacitor jumper installed
- DC input with precharge
- No internal dynamic-braking transistor
- Blank/no-HIM configuration
- Approximately 14.51 kg weight
- Approximately 781 mm overall length
For applications requiring slightly less capacity, the 20F14NF012JN0NNNNN and 20F14NF015JN0NNNNN are logical alternatives.
For higher-capacity applications, the 20F14NF023JN0NNNNN, 20F14NF030JN0NNNNN and 20F14NF034JN0NNNNN provide progressively higher current and power ratings within the same general 690 V common-bus family.
For applications that do not require a 690 V common-bus architecture, smaller PowerFlex 525 or PowerFlex 40-class drives may be more appropriate.
For larger and more sophisticated industrial machinery, the PowerFlex 755 family can provide a broader high-performance platform.
Overall, the 20F14NF020JN0NNNNN is a well-balanced choice for medium-power industrial motor control where high-voltage operation, common-DC-bus architecture, reliable speed control, flexible industrial integration and practical Frame 6 construction are important considerations.