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20F1AND156JN0NNNNN — Detailed Product Specifications, Introduction, Applications, Advantages and Model Selection Guide

1. Product Overview

The 20F1AND156JN0NNNNN is a high-power industrial AC variable frequency drive belonging to the PowerFlex 753 series.

It is designed for large three-phase motor applications where dependable speed control, controlled acceleration and deceleration, process regulation, motor protection and integration with an industrial automation system are required.

This model is designed for the 480 V AC class and provides a 156 A normal-duty output rating. Its rated capacity is 125 HP under normal-duty conditions and 100 HP under heavy-duty conditions.

The drive uses a Frame 6 construction with forced-air cooling. It has an IP20/IP00 open-type enclosure, AC input with precharge, no DC terminals, filtered input configuration, an installed common-mode capacitor jumper, embedded I/O and no HIM supplied as part of this configuration.

The exact 20F1AND156JN0NNNNN configuration also has no internal dynamic-braking transistor. This makes it a practical choice for applications where normal controlled acceleration and deceleration are sufficient. Applications involving large inertia, frequent rapid stopping or significant regenerative energy require additional braking evaluation.

The product is especially suitable for large pumps, fans, blowers, conveyors, compressors, mixers, material-handling systems and general industrial process machinery.

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2. Brand and Product Series

Category	Specification
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 753
Product Type	AC Variable Frequency Drive
Product Category	Industrial AC Drive
Drive Configuration	PowerFlex 753 AC Packaged Drive
Voltage Class	480 V AC
Input Phase	3 Phase
Frame	Frame 6
Cooling	Forced Air
Enclosure	IP20/IP00
Enclosure Type	NEMA/UL Open Type
Typical Installation	Electrical Cabinet / Protected Industrial Enclosure

The PowerFlex 753 series is intended for industrial motor-control applications where flexibility and integration are important.

Rather than being limited to basic motor starting, the platform can be incorporated into larger automation systems and configured for different control, communication, feedback, I/O and safety requirements.

The 20F1AND156JN0NNNNN sits in the higher-capacity portion of the series. It is considerably more powerful than compact machine-level drives while remaining smaller than the largest high-current Frame 7 and Frame 8 configurations.

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3. Product Identification

Parameter	Specification
Model	20F1AND156JN0NNNNN
Brand	Allen-Bradley
Series	PowerFlex 753
Product Type	Industrial AC Drive
Drive Type	Variable Frequency Drive
Input Voltage Class	480 V AC
Input Voltage Range	380–480 V AC
Input Phase	3 Phase
Normal-Duty Current	156 A
Heavy-Duty Current	125 A
Normal-Duty Horsepower	125 HP
Heavy-Duty Horsepower	100 HP
Normal-Duty Power	Approximately 93.2 kW
Heavy-Duty Power	Approximately 74.6 kW
Frame	Frame 6
Cooling	Forced Air
Enclosure	IP20/IP00
Enclosure Type	NEMA/UL Open Type
Input Configuration	AC Input with Precharge
DC Terminals	No
Filtering	Filtered
CM Capacitor Jumper	Installed
Dynamic Braking	None
Dynamic-Braking Transistor	No
Embedded I/O	Yes
HIM	Blank / No HIM
Typical Installation	Electrical Cabinet
Approx. Height	665 mm
Approx. Width	307 mm
Approx. Depth	345 mm
Approx. Dimensions	665 × 307 × 345 mm
Approx. Weight	56.7 kg

The approximately 56.7 kg equipment weight is equivalent to about 125 lb and is useful for cabinet, lifting and transportation planning.

The dimensions of approximately 665 × 307 × 345 mm should be regarded as the drive’s physical envelope for planning purposes. Additional cabinet space is required for cable routing, ventilation, electrical clearances and maintenance access.

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4. Main Electrical Parameters

Electrical Parameter	Specification
Model	20F1AND156JN0NNNNN
Input Voltage	380–480 V AC
Nominal Voltage	480 V AC class
Input Phase	3 Phase
Input Frequency	50 / 60 Hz
Normal-Duty Current	156 A
Heavy-Duty Current	125 A
Normal-Duty Rating	125 HP
Heavy-Duty Rating	100 HP
Normal-Duty Power	Approx. 93.2 kW
Heavy-Duty Power	Approx. 74.6 kW
Output	Variable-frequency 3-phase AC
Frame	6
Input Configuration	AC Input with Precharge
DC Terminals	No
Dynamic Braking	None
Dynamic-Braking Transistor	No
Filtering	Yes
CM Jumper	Installed
Embedded I/O	Yes
HIM	No
Cooling	Forced Air
Enclosure	IP20/IP00

The official horsepower ratings are the most useful values when referring to the catalog configuration.

The metric power values shown above are approximate conversions of the horsepower ratings and should not replace current-based drive selection.

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5. Normal-Duty and Heavy-Duty Ratings

The 20F1AND156JN0NNNNN provides two principal motor-capacity ratings.

Normal Duty

125 HP / approximately 93.2 kW

Heavy Duty

100 HP / approximately 74.6 kW

The distinction between these ratings is important.

Normal-duty applications generally have smoother load characteristics and lower overload requirements.

Typical examples include centrifugal pumps, centrifugal fans and many blower applications.

Heavy-duty applications may require higher torque during acceleration or more demanding overload performance.

Examples can include conveyors, mixers and certain process machines.

Therefore, the correct drive should be selected using both the motor’s nameplate current and the mechanical load profile.

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6. 156 A Output Current

The 156 A normal-duty current rating is a key characteristic of this model.

At this current level, the drive is intended for substantial industrial motors.

When selecting a variable frequency drive, the motor’s actual full-load current is normally more important than simply comparing horsepower.

The motor current is affected by:

• Motor voltage
• Efficiency
• Power factor
• Motor construction
• Operating speed
• Load type
• Temperature
• Duty cycle

For that reason, the motor nameplate should be checked carefully before selecting the drive.

A motor with a nominal power rating close to 125 HP may still have a current requirement that differs from another motor with the same horsepower.

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7. 480 V Three-Phase Input

The drive is designed for the 380–480 V AC three-phase voltage class.

The 480 V class is widely used in industrial motor-control systems and is particularly useful for higher-power motors.

Using a higher motor voltage allows large motor power to be transmitted at a lower current than would be required at a lower voltage.

This helps make large industrial electrical systems more practical in terms of:

• Cable sizing
• Distribution equipment
• Protective devices
• Motor connections
• Cabinet layout

The complete installation must nevertheless be designed around the actual current and electrical characteristics of the motor.

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8. Frame 6 Construction

The Frame 6 construction provides a substantial physical and electrical platform for high-power industrial motor control.

It is larger than compact variable frequency drives but remains smaller than the largest high-current configurations.

Mechanical Parameter	Specification
Model	20F1AND156JN0NNNNN
Frame	6
Height	Approx. 665 mm
Width	Approx. 307 mm
Depth	Approx. 345 mm
Dimensions	Approx. 665 × 307 × 345 mm
Weight	Approx. 56.7 kg
Cooling	Forced Air
Enclosure	IP20/IP00
Installation	Electrical Cabinet
Enclosure Type	NEMA/UL Open Type

The physical dimensions make cabinet planning important.

The actual cabinet should provide additional room around the drive for electrical connections, airflow and maintenance.

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9. Dimensions and Weight

The approximate physical dimensions of the 20F1AND156JN0NNNNN are:

665 mm × 307 mm × 345 mm

The approximate weight is:

56.7 kg

Mechanical Specification	Value
Model	20F1AND156JN0NNNNN
Height	Approx. 665 mm
Width	Approx. 307 mm
Depth	Approx. 345 mm
Overall Dimensions	Approx. 665 × 307 × 345 mm
Weight	Approx. 56.7 kg
Frame	6
Cooling	Forced Air
Enclosure	IP20/IP00

A drive weighing approximately 56.7 kg should be handled using appropriate lifting and installation procedures.

The mounting structure should also be designed to support the equipment weight together with the forces associated with cable connections and cabinet installation.

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10. IP20/IP00 Open-Type Construction

The drive is configured as an IP20/IP00 NEMA/UL Open Type unit.

This means it is not a sealed field enclosure intended for direct exposure to harsh environmental conditions.

A suitable electrical cabinet or protected enclosure is normally required.

The cabinet should protect the drive from:

• Water
• Condensation
• Excessive dust
• Metal particles
• Oil mist
• Corrosive substances
• Accidental contact
• Excessive ambient heat

The open-type design provides flexibility for custom control-panel construction, but it also means that the cabinet designer is responsible for creating the appropriate environmental conditions around the drive.

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11. Forced-Air Cooling

The 20F1AND156JN0NNNNN uses forced-air cooling.

At a normal-duty capacity of 125 HP, the drive can generate considerable heat.

The electrical cabinet therefore needs an appropriate ventilation and thermal-management strategy.

Important factors include:

• Cabinet air temperature
• Airflow direction
• Drive clearance
• Fan operation
• Heat from adjacent drives
• Cabinet ventilation
• Air-filter condition
• Dust accumulation
• Ambient operating conditions

When several drives are installed in one cabinet, the total heat generated by all equipment should be considered.

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12. AC Input with Precharge

The drive uses an AC input with precharge.

The precharge function controls the initial charging of the drive’s DC bus when the unit is energized.

This is particularly important for a large industrial drive because the internal DC-bus capacitors represent a significant electrical load during startup.

The precharge arrangement therefore forms an important part of the drive’s high-power input architecture.

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13. No DC Terminals

The 20F1AND156JN0NNNNN is configured without external DC terminals.

For a conventional AC-fed motor application, this is generally straightforward.

However, if the machine architecture is based on a common DC bus, shared regenerative energy or a special DC-bus arrangement, the exact drive configuration should be reviewed before selecting this model.

This is one of the details that should be checked when comparing similar catalog numbers.

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14. Filtered Configuration

The model uses a filtered input configuration.

Filtering can be valuable in industrial environments where multiple electrical and electronic systems operate in close proximity.

The drive may be installed alongside:

• PLC equipment
• Industrial communication equipment
• Sensors
• HMIs
• Measurement instruments
• Other variable frequency drives
• Control relays
• Industrial power supplies

The complete EMC design still depends on proper grounding, cable selection, cable routing and motor installation.

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15. Common-Mode Capacitor Jumper

The specified configuration includes the common-mode capacitor jumper installed.

This configuration forms part of the drive’s filtering and EMC arrangement.

It should be considered together with the motor cable, grounding system, facility electrical system and the surrounding equipment.

The drive should not be treated as an isolated EMC component.

The entire installation determines the final electromagnetic behavior of the system.

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16. Dynamic Braking Configuration

The 20F1AND156JN0NNNNN does not include an internal dynamic-braking transistor.

This is one of the most important configuration details to understand when comparing this model with other PowerFlex 753 catalog numbers.

For normal pump and fan applications, the lack of internal dynamic braking may not be a significant limitation.

These applications often use relatively gradual acceleration and deceleration.

For high-inertia machinery, however, deceleration can return considerable energy to the drive.

Applications requiring additional braking evaluation include:

• Large conveyors
• Centrifuges
• High-speed fans
• Heavy rotating machinery
• Hoists
• Rapid-stop equipment
• High-inertia production machines

If rapid deceleration is required, an appropriate external braking or regenerative solution should be considered.

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17. Product Advantages

17.1 High 125 HP Normal-Duty Rating

The 125 HP normal-duty rating gives the drive sufficient capacity for large industrial motor applications.

It provides significantly more capacity than compact machine drives and is suitable for large-scale equipment.

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17.2 100 HP Heavy-Duty Rating

The 100 HP heavy-duty rating provides a useful operating range for more demanding applications.

This makes the drive more versatile than a drive intended only for low-overload variable-torque loads.

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17.3 156 A Current Capacity

The 156 A normal-duty current rating provides a substantial operating range for large motors.

This is particularly useful for applications where the motor’s current requirement is the primary selection criterion.

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17.4 480 V Industrial Compatibility

The 480 V class makes the drive suitable for common industrial three-phase motor systems.

It is especially practical for medium-to-large motor installations.

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17.5 Embedded I/O

Embedded I/O provides direct connection capabilities for basic control and monitoring signals.

This can reduce the amount of external interface equipment needed in a conventional control system.

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17.6 Modular Platform

The PowerFlex 753 platform supports modular expansion.

Depending on the application, additional options can provide:

• Communication
• Additional I/O
• Feedback
• Safety
• Machine-control functions

This makes the drive suitable for both conventional and more advanced industrial systems.

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17.7 Practical Frame 6 Size

The Frame 6 construction provides a useful balance between motor capacity and physical size.

It is more compact than the largest high-current Frame 7 and Frame 8 drive configurations while still supporting 156 A output.

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18. Industrial Pump Applications

Large centrifugal pumps are among the most suitable applications for this drive.

The drive can vary motor speed according to actual process demand.

Typical applications include:

• Industrial water circulation
• Cooling-water systems
• Process-water pumps
• Water-treatment equipment
• Pressure-boosting systems
• Industrial fluid transfer
• Utility pumping

Variable-speed control can allow the pump to operate closer to the required process point instead of running continuously at full speed.

This can improve process flexibility and, in suitable systems, reduce energy consumption.

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19. Fan and Blower Applications

Large fans and blowers are another strong application area.

A fan may not need to operate at maximum speed continuously.

The drive can adjust motor speed according to:

• Airflow
• Pressure
• Temperature
• Production demand
• Ventilation requirements

Potential applications include:

• Factory ventilation
• Industrial exhaust
• Process-air systems
• Cooling systems
• Dust collection
• Mining ventilation
• Large air-handling systems

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

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20. Conveyor Applications

The 20F1AND156JN0NNNNN can be used for large conveyor systems when the motor current and duty requirements are within the drive’s rating.

Controlled acceleration can reduce mechanical stress during startup.

This can help protect:

• Conveyor belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Mechanical frames

Variable speed can also help synchronize conveyor operation with upstream and downstream production equipment.

However, the braking requirements should be reviewed carefully if the conveyor has substantial inertia or requires rapid stopping.

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21. Compressor Applications

Large compressors can require significant motor power.

Where the compressor is suitable for variable-speed operation, the drive can provide:

• Controlled startup
• Adjustable speed
• Process regulation
• Pressure control
• Reduced mechanical shock
• Improved operating flexibility

Compressor applications should be evaluated using the compressor’s actual torque characteristics.

A compressor is not automatically equivalent to a centrifugal pump or fan simply because the motor power is similar.

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22. Mixer and Agitator Applications

Industrial mixers and agitators frequently benefit from adjustable speed.

Different stages of the process may require different motor speeds.

For example, a mixer may need:

1. Low speed during loading.
2. Moderate speed during initial mixing.
3. Higher speed during blending.
4. Reduced speed during discharge.

The drive can provide the electrical speed control required for these operating stages.

For applications with severe starting torque or repeated overload conditions, the heavy-duty rating should be considered carefully.

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23. Material-Handling Applications

Material-handling equipment can benefit from controlled acceleration and adjustable operating speed.

Potential applications include:

• Bulk-material conveyors
• Transfer systems
• Feed systems
• Production-line transport
• Industrial handling equipment
• Processing machinery

The main benefit is the ability to control motor speed without relying entirely on mechanical transmission changes.

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24. Process Machinery

The drive can be incorporated into a wide range of process machinery.

Examples include:

• Production equipment
• Industrial pumps
• Large ventilation systems
• Mixing equipment
• Material-processing systems
• General manufacturing machinery

The variable-speed function allows the machine designer to make motor speed part of the overall process strategy.

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25. PID Control Applications

PID control can be useful when the motor needs to respond automatically to a process variable.

A pump can be controlled to maintain pressure.

A fan can respond to airflow.

A circulation system can maintain a target flow rate.

A process machine can respond to another analog feedback variable.

The drive can adjust motor speed according to the control error.

This provides a practical way to integrate motor control and process regulation.

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26. Industrial Automation Integration

The PowerFlex 753 platform is designed to integrate with industrial automation systems.

Depending on the selected options, the drive can participate in control architectures involving:

• PLC systems
• Industrial Ethernet
• Digital I/O
• Analog I/O
• Feedback devices
• Process controllers
• Machine-level control systems

Typical data exchanged between the drive and controller can include:

• Start/stop commands
• Speed references
• Actual speed
• Current
• Status
• Faults
• Warnings
• Diagnostic information

This makes the drive suitable for both standalone motor applications and larger automated production systems.

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27. Safety Integration

The PowerFlex 753 platform can be incorporated into machinery requiring suitable safety functionality.

Depending on the final system configuration, applications may involve:

• Safe torque removal
• Emergency-stop coordination
• Safety interlocking
• Guarding
• Controlled shutdown

The final safety architecture should be determined from the machine’s risk assessment and applicable safety requirements.

The drive should be treated as one part of the overall machine-safety system.

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28. Five Recommended Same-Series or Related Models

The following models are useful comparison choices within the PowerFlex 753 family.

Model	Voltage Class	ND Current	HD Current	ND Power	HD Power	Frame	Approx. Dimensions	Approx. Weight
20F1AND125JN0NNNNN	480 V AC	125 A	96 A	100 HP	75 HP	6	Approx. 665 × 307 × 345 mm	Approx. 56.7 kg
20F1AND156JN0NNNNN	480 V AC	156 A	125 A	125 HP	100 HP	6	Approx. 665 × 307 × 345 mm	Approx. 56.7 kg
20F1AND186JN0NNNNN	480 V AC	186 A	156 A	150 HP	125 HP	6	Approx. 665 × 307 × 345 mm	Approx. 57–60 kg
20F1AND248JN0NNNNN	480 V AC	248 A	186 A	200 HP	150 HP	6	Approx. 665 × 307 × 345 mm	Approx. 57–62 kg
20F1AND302JN0NNNNN	480 V AC	302 A	248 A	250 HP	200 HP	7	Approx. 881 × 430 × 350 mm	Approx. 120–125 kg

The 20F1AND125JN0NNNNN is the lower-current option in this comparison group.

The 20F1AND156JN0NNNNN provides the next step in current capacity.

The 20F1AND186JN0NNNNN and 20F1AND248JN0NNNNN are appropriate comparison choices when the motor current is substantially higher.

The 20F1AND302JN0NNNNN moves into the larger Frame 7 platform and is intended for significantly larger motors.

The dimensions and weights for comparison models should be treated as approximate planning values because the complete catalog configuration can affect physical construction.

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29. Same-Series Capacity Comparison

Model	ND Current	HD Current	ND Power	HD Power	Frame	Relative Capacity
20F1AND125JN0NNNNN	125 A	96 A	100 HP	75 HP	6	Lower
20F1AND156JN0NNNNN	156 A	125 A	125 HP	100 HP	6	Reference
20F1AND186JN0NNNNN	186 A	156 A	150 HP	125 HP	6	Higher
20F1AND248JN0NNNNN	248 A	186 A	200 HP	150 HP	6	Much Higher
20F1AND302JN0NNNNN	302 A	248 A	250 HP	200 HP	7	Very High

This progression makes the 20F1AND156JN0NNNNN a practical choice for motors that require more than the 125 A class but do not require the much larger 186 A, 248 A or 302 A configurations.

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30. Five Same-Brand Popular Models

The following products provide useful comparison points across different power levels and product families.

Model	Product Series	Voltage Class	Power Class	Current Class	Typical Application	Approx. Dimensions	Approx. Weight
20F1AND125JN0NNNNN	PowerFlex 753	480 V	100 HP ND	125 A	Large pumps and fans	665 × 307 × 345 mm	56.7 kg
20F1AND156JN0NNNNN	PowerFlex 753	480 V	125 HP ND	156 A	Large industrial motors	665 × 307 × 345 mm	56.7 kg
20G11ND011JA0NNNNN	PowerFlex 755	480 V class	7.5 kW class	Low-current	Industrial machinery	Approx. 400 × 250 × 250 mm	Approx. 12–20 kg
25B-D017N114	PowerFlex 525	480 V class	7.5 kW class	Low-current	Compact industrial machines	Approx. 250 × 150 × 180 mm	Approx. 5–8 kg
25B-D024N114	PowerFlex 525	480 V class	11 kW class	Low/medium current	Pumps, fans and machine control	Approx. 250 × 180 × 200 mm	Approx. 7–10 kg

These models cover significantly different motor sizes.

The PowerFlex 525 products are intended for considerably smaller machines.

The PowerFlex 755 belongs to a higher-feature drive family and is commonly considered where more advanced control and integration requirements exist.

The PowerFlex 753 models are the closest comparison products for the 20F1AND156JN0NNNNN in terms of high-power general-purpose industrial motor control.

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31. Comparison with Compact Variable Frequency Drives

Parameter	20F1AND156JN0NNNNN	Compact 7.5 kW-Class Drive	Compact 11 kW-Class Drive
Product Class	High-Power Industrial Drive	Compact Drive	Compact Drive
Voltage Class	480 V	480 V	480 V
ND Current	156 A	Much Lower	Much Lower
ND Power	125 HP	Approx. 10 HP	Approx. 15 HP
HD Power	100 HP	Lower	Lower
Frame	6	Compact	Compact
Cooling	Forced Air	Fan Cooled	Fan Cooled
Enclosure	IP20/IP00	Compact	Compact
Approx. Dimensions	665 × 307 × 345 mm	Much Smaller	Much Smaller
Approx. Weight	56.7 kg	Approx. 5–10 kg	Approx. 7–12 kg
Installation	Electrical Cabinet	Machine Panel	Machine Panel
Main Application	Large Industrial Motor	Small/Medium Machine	Medium Machine

The comparison demonstrates the intended role of the 20F1AND156JN0NNNNN.

It is a cabinet-mounted industrial drive rather than a compact machine-level inverter.

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32. Application Suitability

Application	Suitability	Main Reason
Large centrifugal pump	Excellent	High current and variable-speed control
Large centrifugal fan	Excellent	Strong fit for variable-torque loads
Industrial blower	Excellent	Suitable power and current capacity
Cooling-water pump	Excellent	Continuous industrial operation
Conveyor	Very Good	Controlled acceleration and speed
Compressor	Good	Requires application-specific evaluation
Mixer	Good	Suitable with correct duty selection
Agitator	Good	Variable-speed operation
Centrifuge	Conditional	Braking requirements need evaluation
Hoist	Conditional	Special braking and safety requirements
High-inertia machine	Conditional	No internal dynamic braking
Small machine	Poor	Drive would normally be oversized

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33. Advantages for Pump Systems

For large pump systems, the drive can regulate motor speed according to actual process demand.

Instead of forcing the motor to operate continuously at full speed, the drive can adjust speed based on:

• Pressure
• Flow
• Tank level
• Process demand
• Cooling requirements
• Production conditions

This provides more flexible process operation.

In suitable centrifugal-pump systems, reducing speed can also produce significant energy savings compared with continuous full-speed operation.

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34. Advantages for Fan and Blower Systems

Large fans and blowers often operate for long periods.

A fixed-speed motor may operate at full speed even when the process does not require maximum airflow.

Variable-speed operation allows the motor to respond to actual demand.

Potential benefits include:

• Adjustable airflow
• Pressure control
• Reduced mechanical shock
• Improved process control
• Potential energy savings
• Automatic operation

This makes the drive well suited to industrial ventilation and process-air systems.

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35. Advantages for Conveyor Systems

The drive can provide controlled acceleration for large conveyors.

This can help reduce the sudden torque transmitted through the mechanical drivetrain.

Potential benefits include:

• Smoother startup
• Reduced belt stress
• Lower gearbox shock
• Improved production synchronization
• Adjustable conveyor speed
• Better process control

The main limitation is the lack of an internal dynamic-braking transistor for applications that require rapid deceleration.

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36. Advantages for Process Machinery

Industrial process machinery frequently requires several different motor speeds.

The drive can provide the necessary flexibility.

A mixer may require slow speed during material loading.

The same machine may require a higher speed during blending.

A pump may need to change speed according to pressure.

A blower may need to respond to temperature.

The drive can make these speed changes part of the automated process.

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37. Cabinet Installation

The open-type construction means that the drive is normally installed inside a suitable electrical cabinet.

The cabinet should provide enough space for:

• Drive mounting
• Incoming power cables
• Motor cables
• Control wiring
• Grounding
• Communication modules
• Ventilation
• Maintenance
• Protective devices

The physical drive envelope is approximately:

665 mm × 307 mm × 345 mm

This should not be interpreted as the complete cabinet size.

Additional clearance is required around the drive.

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38. Thermal Management

The drive’s forced-air cooling system needs to be considered as part of the cabinet design.

Thermal management should account for:

• Drive losses
• Other drives
• Contactors
• Power supplies
• Transformers
• PLC equipment
• Ambient temperature
• Cabinet ventilation

If the cabinet becomes excessively hot, drive reliability and available performance can be affected.

A well-designed cabinet should therefore establish a predictable airflow path rather than simply relying on natural convection.

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39. Electrical Installation Considerations

Installation Item	Main Requirement
Incoming Voltage	380–480 V AC
Input Phase	Three Phase
Drive Current	156 A ND
Motor Current	Must remain within applicable drive rating
Protective Device	Correctly rated upstream protection
Motor Cable	Proper current capacity and installation method
Grounding	Correct protective grounding
Cabinet	Appropriate environmental protection
Cooling	Adequate heat removal
EMC	Correct cable routing and grounding
Short-Circuit Rating	Suitable for the complete installation
Maintenance	Adequate access

Large-drive installations should be engineered as complete systems.

The drive’s current rating alone does not determine the final cable or protective-device size.

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40. Motor Selection

The motor nameplate should be reviewed before selecting the drive.

Motor Parameter	Importance
Rated Voltage	Must be compatible with drive output
Full-Load Current	Primary sizing parameter
Rated Power	General reference
Rated Frequency	Required for motor configuration
Rated Speed	Important for control setup
Power Factor	Required motor parameter
Efficiency	Useful motor parameter
Motor Type	Determines control requirements
Insulation	Important for inverter-fed operation
Encoder	Required for some closed-loop applications
Load Type	Determines duty selection

The 156 A normal-duty current rating should be compared directly with the motor’s actual full-load current.

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41. Normal-Duty and Heavy-Duty Application Guide

Application	Typical Duty Consideration
Centrifugal Pump	Normal Duty
Centrifugal Fan	Normal Duty
Large Blower	Normal Duty
Conveyor	Heavy Duty / Application Specific
Mixer	Heavy Duty / Application Specific
Agitator	Heavy Duty / Application Specific
Crusher	Heavy Duty
Compressor	Application Specific
Centrifuge	Application Specific
Hoist	Special Application
High-Inertia Machinery	Application Specific

The final duty selection should always be based on actual load characteristics.

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42. Dynamic-Braking Considerations

Because this configuration has no internal dynamic-braking transistor, applications requiring rapid deceleration should receive additional attention.

For a normal centrifugal pump, the motor may be allowed to coast down or decelerate gradually.

For a heavy conveyor, rapid deceleration may create substantial regenerative energy.

For a centrifuge, the rotating mass may continue returning energy to the drive during deceleration.

For a hoist, braking is a fundamental part of the mechanical and safety design.

Therefore, the braking strategy should be evaluated using:

• Motor power
• Motor speed
• Load inertia
• Deceleration time
• Number of braking events
• Braking frequency
• Mechanical stopping requirements
• Thermal requirements

The absence of internal dynamic braking is therefore neither universally good nor bad; it depends on the application.

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43. Product Strengths and Limitations

Category	Assessment
Normal-Duty Capacity	Excellent
Heavy-Duty Capacity	Very Good
Output Current	Excellent
480 V Compatibility	Excellent
Pump Applications	Excellent
Fan Applications	Excellent
Conveyor Applications	Very Good
Process Control	Very Good
Embedded I/O	Very Good
Modular Expansion	Very Good
Filtered Configuration	Very Good
Cabinet Integration	Good
Dynamic Braking	Not included
High-Inertia Rapid Stop	Requires additional evaluation
Compact Machine Use	Not recommended
Physical Size	Medium/Large
Weight	56.7 kg

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44. Complete Technical Parameter Table

Category	Parameter	Specification
Product	Model	20F1AND156JN0NNNNN
Product	Brand	Allen-Bradley
Product	Series	PowerFlex 753
Product	Product Type	AC Variable Frequency Drive
Product	Drive Configuration	AC Packaged Drive
Electrical	Input Voltage	380–480 V AC
Electrical	Nominal Voltage	480 V AC
Electrical	Input Phase	3 Phase
Electrical	Input Frequency	50 / 60 Hz
Electrical	Normal-Duty Current	156 A
Electrical	Heavy-Duty Current	125 A
Electrical	Normal-Duty Rating	125 HP
Electrical	Heavy-Duty Rating	100 HP
Electrical	Normal-Duty Power	Approx. 93.2 kW
Electrical	Heavy-Duty Power	Approx. 74.6 kW
Electrical	Output	Variable-frequency 3-phase AC
Construction	Frame	6
Construction	Cooling	Forced Air
Construction	Enclosure	IP20/IP00
Construction	Enclosure Type	NEMA/UL Open Type
Input	AC Input	Yes
Input	Precharge	Yes
Input	DC Terminals	No
EMC	Filtering	Filtered
EMC	CM Capacitor Jumper	Installed
Braking	Dynamic Braking	None
Braking	Dynamic-Braking Transistor	No
Interface	Embedded I/O	Yes
Interface	HIM	Blank / No HIM
Control	PID	Supported
Control	Variable Speed	Yes
Mechanical	Height	Approx. 665 mm
Mechanical	Width	Approx. 307 mm
Mechanical	Depth	Approx. 345 mm
Mechanical	Dimensions	Approx. 665 × 307 × 345 mm
Mechanical	Weight	Approx. 56.7 kg
Installation	Mounting	Electrical Cabinet
Application	Motor Type	Three-Phase AC Motor
Application	Normal-Duty Class	125 HP
Application	Heavy-Duty Class	100 HP
Application	Typical Loads	Pumps, fans, blowers, conveyors, compressors
Environment	Installation	Protected Industrial Environment

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45. Five Same-Series Models — Quick Selection Table

Model	Voltage	ND Current	HD Current	ND Power	HD Power	Frame	Dimensions	Weight
20F1AND125JN0NNNNN	480 V	125 A	96 A	100 HP	75 HP	6	Approx. 665 × 307 × 345 mm	Approx. 56.7 kg
20F1AND156JN0NNNNN	480 V	156 A	125 A	125 HP	100 HP	6	Approx. 665 × 307 × 345 mm	Approx. 56.7 kg
20F1AND186JN0NNNNN	480 V	186 A	156 A	150 HP	125 HP	6	Approx. 665 × 307 × 345 mm	Approx. 57–60 kg
20F1AND248JN0NNNNN	480 V	248 A	186 A	200 HP	150 HP	6	Approx. 665 × 307 × 345 mm	Approx. 57–62 kg
20F1AND302JN0NNNNN	480 V	302 A	248 A	250 HP	200 HP	7	Approx. 881 × 430 × 350 mm	Approx. 120–125 kg

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46. Five Same-Brand Models — Quick Comparison

Model	Series	Voltage Class	ND Power Class	Current Class	Application	Dimensions	Weight
20F1AND125JN0NNNNN	PowerFlex 753	480 V	100 HP	125 A	Large pumps and fans	665 × 307 × 345 mm	56.7 kg
20F1AND156JN0NNNNN	PowerFlex 753	480 V	125 HP	156 A	Large industrial motors	665 × 307 × 345 mm	56.7 kg
20G11ND011JA0NNNNN	PowerFlex 755	480 V class	7.5 kW class	Low-current	Industrial machinery	Approx. 400 × 250 × 250 mm	Approx. 12–20 kg
25B-D017N114	PowerFlex 525	480 V class	7.5 kW class	Low-current	Compact machinery	Approx. 250 × 150 × 180 mm	Approx. 5–8 kg
25B-D024N114	PowerFlex 525	480 V class	11 kW class	Low/medium current	Pumps, fans and machine control	Approx. 250 × 180 × 200 mm	Approx. 7–10 kg

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47. Overall Product Assessment

The 20F1AND156JN0NNNNN is a high-capacity PowerFlex 753 AC variable frequency drive intended for substantial industrial motor-control applications.

Its principal specifications are:

• 380–480 V AC input
• 480 V nominal voltage class
• Three-phase operation
• 156 A normal-duty output
• 125 A heavy-duty output
• 125 HP normal-duty rating
• 100 HP heavy-duty rating
• Approximately 93.2 kW normal-duty capacity
• Approximately 74.6 kW heavy-duty capacity
• Frame 6
• Forced-air cooling
• IP20/IP00 open-type construction
• AC input with precharge
• No DC terminals
• Filtered configuration
• CM capacitor jumper installed
• Embedded I/O
• No HIM
• No internal dynamic-braking transistor

Its approximate physical dimensions are 665 × 307 × 345 mm, and its approximate weight is 56.7 kg.

The model offers a strong combination of high current capacity, substantial motor horsepower, 480 V industrial compatibility and flexible automation integration.

For large pumps and fans, it provides a particularly good match because these applications often benefit from adjustable-speed operation and do not necessarily require aggressive braking.

For conveyors, mixers and process machinery, the 100 HP heavy-duty rating provides useful additional capacity, although the actual motor current and load profile should always be checked.

For high-inertia applications, the absence of an internal dynamic-braking transistor is the primary configuration point requiring attention.

The Frame 6 design also gives the drive a useful balance between electrical capacity and physical size. It is large enough for demanding industrial motors while remaining substantially more compact than the highest-current Frame 7 and Frame 8 configurations.

Within the same series, the 20F1AND125JN0NNNNN is the natural lower-capacity alternative, while the 20F1AND186JN0NNNNN, 20F1AND248JN0NNNNN and 20F1AND302JN0NNNNN provide progressively greater current and motor capacity.

Overall, the 20F1AND156JN0NNNNN can be positioned as a 125 HP-class, 480 V, Frame 6 industrial AC drive, particularly suitable for large pumps, fans, blowers, conveyors, compressors, mixers and other industrial machinery requiring dependable variable-speed motor control and cabinet-based installation.