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Allen-Bradley 20LD650N0NNNCNW0WN — Detailed Product Specifications, Applications, Advantages and Related Models

1. Product Overview

The 20LD650N0NNNCNW0WN is a high-power PowerFlex 700L liquid-cooled adjustable-frequency AC drive designed for large industrial motor-control applications.

It is a heavy-duty industrial drive intended for applications where conventional air-cooled variable-frequency drives are not practical or where a high power-to-size ratio and liquid-cooled thermal management are required.

The base drive designation 20LD650 corresponds to a Frame 3A PowerFlex 700L configuration with a nominal 650 A output class.

For 480 VAC motor applications, the 20LD650 is rated at approximately 600 HP / 445 kW for Normal Duty and 440 HP / 325 kW for Heavy Duty.

The drive uses liquid cooling to remove heat from the power electronics.

This makes the PowerFlex 700L family particularly useful for large industrial machinery where cabinet space, heat dissipation and high motor power are important design considerations.

The complete catalog number 20LD650N0NNNCNW0WN represents a configured version of the 20LD650 product rather than simply a generic 650 A drive.

The product is therefore best considered as a complete industrial drive configuration within the PowerFlex 700L family.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product Family	PowerFlex 700L
Product Series	PowerFlex 700L Liquid-Cooled AC Drives
Model	20LD650N0NNNCNW0WN
Base Catalog Number	20LD650
Product Type	Liquid-Cooled Adjustable-Frequency AC Drive
Drive Technology	Variable-Frequency AC Drive
Frame	3A
Nominal Current Class	650 A
Voltage Class	480 VAC class
Input	Three-Phase AC
Cooling	Liquid Cooled
Normal-Duty Rating	600 HP / 445 kW
Heavy-Duty Rating	440 HP / 325 kW
PWM Frequency	4 kHz class
Typical Application	Large Industrial Motor Control

The PowerFlex 700L family was designed for demanding industrial applications where liquid cooling provides a significant advantage over conventional air cooling.

The family includes high-current drive configurations intended for large motors and large process machines.

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3. Main Technical Parameters

Parameter	Specification
Model	20LD650N0NNNCNW0WN
Base Model	20LD650
Brand	Allen-Bradley
Series	PowerFlex 700L
Product Type	Liquid-Cooled Adjustable-Frequency AC Drive
Frame	3A
Input Voltage Class	480 VAC
Input Phase	3 Phase
Output Current	650 A continuous class
Normal-Duty Power	600 HP / 445 kW
Heavy-Duty Power	440 HP / 325 kW
Normal-Duty Overload	110% for 1 minute / 150% for 3 seconds
Heavy-Duty Overload	150% for 1 minute / 200% for 3 seconds
PWM Frequency	4 kHz
Cooling	Liquid Cooled
Drive Type	Adjustable-Frequency AC Drive
Motor Type	AC Induction Motor applications
DC Input Capability	Available in specified configurations
DC Input Rating	1250 A for the applicable DC-input configuration
Dynamic Braking	Configuration dependent
Enclosure	Industrial cabinet configuration
Mounting	Industrial cabinet / floor-mounted system
Approx. Width	800–1,200 mm*
Approx. Depth	600–1,000 mm*
Approx. Height	1,800–2,200 mm*
Approx. Weight	400–800 kg*

* Exact dimensions and weight depend on the complete configured drive cabinet, cooling system, options, disconnect equipment and installation arrangement. The values shown are suitable only for preliminary engineering planning.

For transportation, lifting, foundation loading and final cabinet layout, the actual configured mechanical drawing should be used.

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4. Electrical Rating Details

The 20LD650 is a high-current drive configuration.

For a 480 VAC three-phase induction motor application, its published rating information includes the following values.

Duty	Motor Rating	Continuous Current	1-Minute Overload	3-Second Overload
Normal Duty	600 HP / 445 kW	650 A	715 A	975 A
Heavy Duty	440 HP / 325 kW	475 A	715 A	975 A

The distinction between Normal Duty and Heavy Duty is important.

The drive can support a larger motor power rating when the application has a comparatively lower overload requirement.

When the machine requires greater torque overload capability, the Heavy Duty rating provides a lower continuous motor power rating but substantially greater overload capability relative to that rating.

This makes the same basic drive hardware suitable for different industrial load profiles.

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5. Normal-Duty Operation

The Normal Duty configuration is rated at approximately 600 HP / 445 kW with a continuous current of approximately 650 A.

The overload capability is approximately 110% for one minute and 150% for three seconds.

This type of rating is appropriate for applications where the motor operates at a relatively high continuous load but does not require extremely high short-term torque overload.

Typical examples can include large fans, pumps, conveyors and process machinery with relatively stable loads.

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6. Heavy-Duty Operation

The Heavy Duty rating is approximately 440 HP / 325 kW.

The continuous current rating associated with the Heavy Duty motor application is approximately 475 A, while the drive provides approximately 150% overload for one minute and 200% for three seconds.

This rating is more appropriate for machinery where short-term torque requirements are significantly higher.

Typical applications can include crushers, conveyors with heavy starting loads, material handling equipment and machines with frequent acceleration.

The motor should always be selected according to the actual application duty rather than simply using the largest published horsepower number.

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7. Liquid-Cooling Technology

The defining feature of the PowerFlex 700L family is its liquid-cooled power section.

Conventional large AC drives normally rely on fans and air passages to remove heat.

As drive power increases, air cooling can require substantial airflow and physical cabinet space.

Liquid cooling provides a different thermal-management approach.

Heat generated by the power semiconductor devices is transferred into a liquid cooling circuit.

The heat can then be removed through an external heat exchanger or associated cooling system.

This allows the drive power section to be designed with a high power density.

For large industrial machines, this can provide a significant mechanical advantage.

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8. Why Liquid Cooling Is Important

At 650 A class current levels, the power electronics can generate considerable heat.

With conventional air cooling, the resulting heat must be transferred into the cabinet environment or extracted through a large ventilation system.

Liquid cooling can move heat away from the semiconductor power modules more efficiently.

This can reduce the amount of hot air circulating around the electrical equipment.

It can also reduce the size of the ventilation system required directly around the power electronics.

The result can be a more compact high-power drive installation.

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9. PowerFlex 700L Product Architecture

The PowerFlex 700L family was designed around the idea of combining advanced variable-frequency drive control with liquid-cooled high-power electronics.

The architecture is particularly useful for applications where:

• Motor power is high.
• Cabinet space is limited.
• Ambient heat is difficult to manage.
• High power density is required.
• Several large drives must be installed together.
• Mechanical equipment operates continuously.
• The motor requires substantial torque.

The 20LD650 is therefore fundamentally different from a small general-purpose variable-frequency drive.

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10. Product Introduction

The 20LD650N0NNNCNW0WN is intended to control the speed, torque and operating characteristics of large AC motors.

A variable-frequency drive works by converting incoming electrical power into a controlled output waveform whose frequency and voltage can be adjusted.

Changing the output frequency changes the motor’s operating speed.

Changing the voltage and frequency relationship allows the drive to maintain appropriate motor flux and torque characteristics over a wide operating range.

The drive can therefore provide controlled acceleration, controlled deceleration, speed regulation and torque management.

For large industrial machinery, these functions can significantly improve process control compared with direct-on-line motor starting.

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11. Variable-Frequency Motor Control

The drive controls the motor by generating a controlled three-phase output.

At low speed, the output frequency can be reduced.

As the desired motor speed increases, the drive increases the output frequency.

The motor therefore does not need to run only at the fixed speed imposed by the incoming AC frequency.

This allows machine designers to match motor speed to the actual process requirement.

For pumps and fans, this can provide particularly useful control because the machine does not have to operate continuously at full speed.

For conveyors and process machinery, variable speed can improve production flexibility.

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12. High-Current Drive Capability

The 650 A current class is one of the most important characteristics of the product.

This current level allows the drive to control very large motors.

The published 480 VAC rating corresponds to approximately 600 HP / 445 kW Normal Duty.

That places the drive in a completely different application category from compact industrial VFDs.

The equipment is intended for large machinery and process systems.

Typical installations can involve motors used for pumping, conveying, crushing, rolling, processing and other heavy industrial operations.

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13. DC Input Capability

One notable characteristic of the PowerFlex 700L Frame 3A architecture is that a specified configuration can be supplied from a DC input.

For the 20LD650 DC-input configuration, the documentation identifies a 1250 A DC input rating.

The DC-input configuration is associated with the Dual Inverter arrangement for Frame 3A.

This makes the product family suitable for certain applications where DC bus architecture is required.

A DC-fed inverter can be particularly useful in systems where power is supplied from a centralized DC source or where multiple drive sections share a DC bus.

The exact DC-input arrangement must be selected from the appropriate configured catalog number.

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14. Main Applications

14.1 Large Pumps

Large industrial pumps can require hundreds of kilowatts of motor power.

The 20LD650 can provide variable-speed control for large pump systems.

Instead of operating the pump motor continuously at full speed, the drive can adjust motor speed according to process requirements.

This can improve process control and may reduce energy consumption in applications where flow requirements vary.

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14.2 Large Fans

Large fans used in industrial plants can consume significant electrical power.

Speed control allows the fan to operate according to the required airflow rather than simply switching between full-speed operation and shutdown.

This is useful in ventilation systems, cooling systems, combustion-air systems and process ventilation.

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14.3 Conveyors

Large conveyors frequently require high motor power.

The drive can provide controlled acceleration and deceleration.

This helps reduce mechanical shock to belts, gearboxes, couplings and other mechanical components.

For long conveyors, controlled starting can also reduce sudden tension changes in the belt.

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14.4 Crushers

Crushers can place severe demands on motors because of their high starting torque and changing mechanical load.

The Heavy Duty capability of the 20LD650 makes this type of application particularly relevant.

The drive can provide controlled acceleration and high short-term overload capability.

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14.5 Mining Machinery

Mining equipment often requires large motors.

Applications can include:

• Conveyors
• Crushers
• Pumps
• Fans
• Hoists
• Processing equipment
• Material handling systems

The liquid-cooled construction can be useful where large power electronics must operate continuously in a compact electrical installation.

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14.6 Steel Processing

Steel plants contain numerous large motors.

Rolling mills, cooling systems, material handling equipment and processing machinery can all require large variable-speed drives.

The 20LD650 provides the current capacity required for some large motor applications.

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14.7 Cement Processing

Cement plants use large motors for crushers, mills, fans and conveyors.

These machines often operate continuously and may require high torque.

A high-power variable-frequency drive can provide controlled motor speed and starting.

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14.8 Paper and Pulp Machinery

Paper machines use multiple large motors for different process sections.

Speed coordination is important.

A large liquid-cooled drive can be used where the motor power exceeds the practical range of smaller air-cooled drives.

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14.9 Material Handling

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

The drive can provide controlled speed, acceleration and deceleration.

This can help reduce mechanical stress throughout the transmission system.

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14.10 Process Machinery

Chemical, petrochemical, water-treatment and manufacturing plants can use large motors for pumps, fans, compressors and other process equipment.

The 20LD650 can be used where the required motor current falls within its rating.

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15. Main Product Advantages

15.1 Liquid Cooling

Liquid cooling is the most distinctive advantage of the product family.

It allows heat to be removed directly from the power electronics through a liquid cooling circuit.

This can provide better thermal management for high-power applications.

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15.2 High Power Density

The 20LD650 provides approximately 445 kW of Normal Duty motor capacity in a liquid-cooled architecture.

The ability to remove heat efficiently allows high power to be packaged into a relatively compact power section.

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15.3 High Current Capability

The 650 A current class allows the drive to operate large industrial motors.

This makes it suitable for large pumps, fans, conveyors and heavy process machinery.

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15.4 Heavy-Duty Overload Capability

The Heavy Duty rating provides approximately 150% overload for one minute and 200% for three seconds.

This is useful for applications with high starting torque or short-duration mechanical load changes.

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15.5 Controlled Motor Starting

The drive can accelerate a large motor gradually instead of applying full line voltage immediately.

This can reduce mechanical shock.

It can also reduce the electrical stress associated with direct-on-line starting.

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15.6 Variable-Speed Operation

The motor speed can be adjusted according to process requirements.

This can provide better control of pumps, fans, conveyors and other variable-speed machinery.

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15.7 Reduced Cabinet Heat

Because the power section is liquid cooled, less of the power semiconductor heat needs to be transferred into the surrounding cabinet air.

This can be particularly useful in installations where cabinet heat is a major engineering concern.

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15.8 Suitable for Large Industrial Equipment

The product is designed for industrial applications where compact general-purpose drives are not sufficient.

Its current and power capability make it suitable for large motors and large process equipment.

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16. Mechanical Characteristics

The 20LD650 is a large industrial drive.

It should not be treated like a compact panel-mounted VFD.

The installation normally requires a dedicated cabinet or industrial drive enclosure arrangement.

The liquid cooling system also needs physical space.

This includes the cooling connections, coolant circulation equipment and heat-exchange components associated with the installation.

The final mechanical arrangement depends on the exact PowerFlex 700L configuration.

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17. Approximate Dimensions and Weight

The exact dimensions of a complete 20LD650N0NNNCNW0WN installation depend on the selected cabinet and cooling arrangement.

For preliminary planning, the following range can be used.

Mechanical Parameter	Approximate Value
Width	Approx. 800–1,200 mm
Depth	Approx. 600–1,000 mm
Height	Approx. 1,800–2,200 mm
Weight	Approx. 400–800 kg
Mounting	Floor/Cabinet Mounted
Cooling	Liquid Cooled
Frame	3A
Installation	Industrial Electrical Room / Drive Cabinet
Service Clearance	Required
Cooling Connections	Required

These values are approximate engineering planning values.

The actual physical dimensions and weight can change depending on the selected enclosure, cooling equipment, input configuration, output configuration and options.

For final installation work, the configured mechanical drawing should be used.

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18. Thermal Management

Thermal management is a major consideration with a drive of this size.

At hundreds of kilowatts, even a small percentage of electrical losses can translate into substantial heat.

For example, a 1% loss at 445 kW corresponds to approximately 4.45 kW of heat.

A 2% loss would represent approximately 8.9 kW.

This illustrates why efficient thermal management becomes increasingly important as drive power increases.

Liquid cooling provides a practical method of transporting this heat away from the power electronics.

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19. Cooling System Considerations

The cooling circuit should be designed carefully.

Important considerations include:

• Coolant quality
• Coolant temperature
• Flow rate
• Pressure
• Heat exchanger capacity
• Pump performance
• Leak protection
• Hose and fitting condition
• Ambient temperature
• Maintenance accessibility

The cooling system is an important part of the overall drive installation rather than an optional secondary component.

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20. Maintenance Advantages

Liquid cooling can reduce the amount of hot air passing through the power electronics.

This can be helpful in dusty industrial environments because the power section does not depend entirely on high-volume air movement for cooling.

However, liquid cooling introduces its own maintenance requirements.

Coolant lines should be inspected.

Connections should be checked for leaks.

Cooling fluid condition should be maintained appropriately.

Heat exchangers should remain clean.

Pumps and associated cooling equipment should be maintained according to the installation requirements.

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21. Motor Control Applications

The 20LD650 can be used where large AC motors need controlled speed and torque.

Typical motor-control functions can include:

• Controlled acceleration
• Controlled deceleration
• Variable-speed operation
• Torque control
• Process speed regulation
• Motor protection functions
• Current limiting
• Overload management
• Coordinated machine operation

The exact control functions depend on the control configuration and application requirements.

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22. Conveyor Application

A large conveyor system can benefit from controlled motor acceleration.

Starting a large conveyor directly across the line can produce high starting current and substantial mechanical shock.

Using a variable-frequency drive allows the motor to accelerate gradually.

This can reduce stress on:

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

It can also improve production control because the conveyor speed can be adjusted to match the process.

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23. Pump Application

Pump systems are one of the most common applications for variable-speed drives.

The drive can adjust motor speed according to the required flow or pressure.

In variable-torque applications, reducing motor speed can significantly reduce the mechanical power required.

This can make variable-speed operation attractive for large pumps where process requirements change over time.

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24. Fan Application

Industrial fans can also benefit from variable-speed control.

A fan that operates continuously at maximum speed may consume substantially more energy than required during periods of reduced demand.

A variable-frequency drive can reduce the fan speed.

This provides a more flexible approach to airflow management.

Large industrial ventilation and process-air systems are therefore suitable candidates for this type of drive.

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25. Crusher Application

Crusher systems are mechanically demanding.

The motor can experience sudden load changes.

A drive with significant overload capability can provide controlled acceleration and respond to changes in mechanical torque.

The Heavy Duty rating of the 20LD650 is particularly relevant when the application requires substantial short-term overload.

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26. Mining Application

Mining environments frequently involve large motors operating continuously.

Examples include:

• Ore conveyors
• Crushers
• Pumps
• Fans
• Hoists
• Material-handling systems

The liquid-cooled design can be useful where high power and compact electrical installation are important.

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27. Steel Mill Application

Steel-processing equipment can require high motor torque and precise speed control.

Large motors can be used for rolling, conveying, cooling and processing.

The PowerFlex 700L architecture is suited to large industrial motor systems where high power density is important.

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28. Product Selection Considerations

When selecting the 20LD650N0NNNCNW0WN, engineers should consider more than motor horsepower.

Important selection parameters include:

Selection Factor	Importance
Motor Voltage	Must match the drive output voltage range
Motor Current	Must remain within the applicable drive rating
Duty Cycle	Determines ND or HD suitability
Starting Torque	Important for heavy-duty applications
Overload	Must match machine requirements
Cooling System	Must support the required thermal load
Ambient Temperature	Affects operating capability
Installation Altitude	Can influence thermal performance
Motor Type	Must be compatible with the control method
Cable Length	Can affect output filtering requirements
Regeneration	Must be evaluated separately
DC Bus	Required for applicable system configurations
Cabinet Space	Large physical installation required
Maintenance	Cooling-system access required

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29. Five Related Models from the Same Series

The following PowerFlex 700L models are closely related to the 20LD650 and can be considered when the required voltage or power level changes.

Model	Series	Frame	Voltage Class	ND Rating	HD Rating	Current Class
20LD360	PowerFlex 700L	Frame 2	480 VAC	300 HP / 224 kW	235 HP / 175 kW	360 A
20LD650	PowerFlex 700L	Frame 3A	480 VAC	600 HP / 445 kW	440 HP / 325 kW	650 A
20LD1K2	PowerFlex 700L	Frame 3B	480 VAC	1150 HP / 860 kW	845 HP / 630 kW	1250 A
20LC650	PowerFlex 700L	Frame 3A	400 VAC class	500 HP / 370 kW	365 HP / 270 kW	650 A
20LE800	PowerFlex 700L	Frame 3B	600 VAC class	870 HP / 650 kW	640 HP / 480 kW	800 A

These models provide a useful range for selecting a PowerFlex 700L drive according to voltage and power requirements.

The 20LD360 is a smaller 480 VAC liquid-cooled configuration.

The 20LD1K2 provides substantially greater current and power capability.

The 20LC650 uses the same general 650 A class but is associated with a lower voltage configuration.

The 20LE800 moves into the 600 VAC class and a higher power range.

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30. Same-Series Model Comparison

Model	Frame	Voltage Class	ND Power	HD Power	Current
20LD360	2	480 VAC	224 kW	175 kW	360 A
20LD650	3A	480 VAC	445 kW	325 kW	650 A
20LD1K2	3B	480 VAC	860 kW	630 kW	1250 A
20LC650	3A	400 VAC class	370 kW	270 kW	650 A
20LE800	3B	600 VAC class	650 kW	480 kW	800 A

The 20LD650 occupies the middle-to-high range within the 480 VAC liquid-cooled configurations.

It provides considerably more capacity than the 20LD360 while remaining below the very large 1250 A class of the 20LD1K2.

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31. Five Same-Brand Popular Models

The broader PowerFlex portfolio includes several well-known drive families for different industrial applications.

Model	Product Family	Voltage Class	General Power Range	Typical Application
25B-D017N114	PowerFlex 525	380–480 VAC	Approx. 7.5 kW class	Compact machinery
20F11NC022JA0NNNNN	PowerFlex 753	380–480 VAC	Medium-power class	Industrial motor control
20F11NC034JA0NNNNN	PowerFlex 753	380–480 VAC	Medium/high-power class	Industrial machinery
20G1ANB140JA0NNNNN	PowerFlex 755	380–480 VAC	High-power class	Advanced industrial drives
20G1ANC350JA0NNNNN	PowerFlex 755	380–480 VAC	High-power class	Large industrial machines

These models are not direct replacements for the 20LD650.

They belong to different product generations and application ranges.

They are included as related same-brand references for users comparing different sizes and drive architectures.

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32. Broader PowerFlex Comparison

Product Family	Cooling	Typical Application	Power Range	Main Characteristic
PowerFlex 525	Air Cooled	Small/Medium Machines	Low/Medium	Compact installation
PowerFlex 753	Air Cooled	Medium/Large Machines	Medium/High	Industrial motor control
PowerFlex 755	Air Cooled	Large Machines	High	Advanced drive control
PowerFlex 700L	Liquid Cooled	Large Industrial Machines	High/Very High	High power density
20LD650	Liquid Cooled	Large Industrial Motor Systems	445 kW ND	650 A class

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33. Liquid Cooling Compared with Air Cooling

Characteristic	Liquid-Cooled 20LD650	Conventional Air-Cooled Drive
Thermal Transfer	High efficiency	Air-based
Cabinet Airflow	Reduced requirement	Higher requirement
Power Density	High	Lower at comparable power
Heat Rejection	Through coolant system	Through air
Cooling Infrastructure	Requires liquid circuit	Requires ventilation/fans
High-Power Suitability	Excellent fit	Depends on size and environment
Maintenance	Cooling circuit + electronics	Fans + air passages + electronics
Cabinet Heat	Potentially lower	Potentially higher
Installation Complexity	Higher cooling-system complexity	Simpler cooling infrastructure

Liquid cooling does not automatically make an installation simpler.

Instead, it changes the thermal-management problem.

The electrical cabinet can benefit from reduced air heat, but the cooling circuit must be properly designed and maintained.

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34. High-Power Motor Starting

Large motors can draw very high current when connected directly to the electrical supply.

A variable-frequency drive allows the motor to start at a controlled frequency and voltage.

The motor can therefore accelerate smoothly.

This can reduce:

• Mechanical shock
• Coupling stress
• Gearbox stress
• Belt stress
• Hydraulic shock
• Electrical supply disturbance

For large industrial machinery, controlled starting can be an important operational benefit.

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35. Speed Control Advantages

Variable-speed operation provides process flexibility.

A motor does not have to operate continuously at maximum speed.

The drive can adjust speed according to process requirements.

This is especially useful for:

• Pumps
• Fans
• Conveyors
• Mixers
• Extruders
• Processing machines
• Material-handling equipment

The actual energy benefit depends strongly on the mechanical load profile.

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36. Heavy-Duty Application Advantages

The Heavy Duty rating of the 20LD650 is important for machines that experience short-duration high torque.

The published Heavy Duty rating is approximately:

440 HP / 325 kW

with:

475 A continuous current

and overload capability of approximately:

150% for 1 minute

and:

200% for 3 seconds.

This makes the configuration suitable for machines where the average power is lower than the maximum Normal Duty rating but the short-term torque requirement is significantly higher.

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37. Electrical Protection

Large industrial drives require appropriate upstream protection.

The PowerFlex 700L documentation provides specific protection information for the various input configurations.

For the 20LD650 DC-input configuration, a 1250 A DC input rating is identified.

The corresponding fuse arrangement is associated with high-current semiconductor protection.

Protection selection should be based on the actual configured drive and applicable electrical standards.

The protection device should not be selected simply from the motor horsepower.

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38. Environmental Considerations

The installation environment can have a major impact on the life of a high-power drive.

Important factors include:

• Ambient temperature
• Humidity
• Dust
• Chemical contamination
• Vibration
• Altitude
• Cooling-water quality
• Cooling-fluid temperature
• Electrical grounding
• Cabinet ventilation

Liquid cooling can reduce dependence on cabinet airflow, but it does not eliminate environmental considerations.

The coolant system itself must be protected from contamination and maintained correctly.

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39. Maintenance Requirements

Regular maintenance should include both the electrical drive and the cooling system.

Recommended inspection areas include:

Electrical Section

Check power connections, grounding, control wiring and visible signs of overheating.

Cooling Circuit

Check coolant level, flow, temperature, fittings and hoses.

Heat Exchanger

Keep the heat exchanger clean and ensure adequate thermal performance.

Pumps

Inspect the cooling pump for abnormal noise, vibration or reduced flow.

Power Electronics

Check for signs of thermal stress or abnormal operating conditions.

Cabinet

Keep the cabinet clean and maintain adequate service access.

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40. Product Advantages Summary

Advantage	Description
Liquid Cooling	Efficient thermal management for high-power electronics
650 A Class	Suitable for very large AC motors
445 kW ND Rating	High continuous Normal Duty capacity
325 kW HD Rating	High Heavy Duty motor capability
High Overload Capability	Suitable for demanding starting and transient loads
High Power Density	Large output capability in a liquid-cooled architecture
Variable-Speed Control	Allows motor speed to follow process requirements
Controlled Starting	Reduces mechanical and electrical starting stress
Industrial Construction	Designed for demanding industrial applications
DC Input Option	Supports specific common-DC-bus configurations

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41. Product Selection Summary

Requirement	Suitability of 20LD650N0NNNCNW0WN
Small motor	Not the intended application range
Medium motor	Usually excessive capacity
Large motor	Suitable
Very large motor	Suitable within rating
High starting torque	Suitable with Heavy Duty sizing
Continuous high load	Suitable within Normal Duty rating
Limited cabinet heat	Liquid cooling can be advantageous
Compact high-power installation	Suitable architecture
Common DC bus	Applicable in specified configurations
DC-fed inverter	Applicable to the appropriate configured version
Large industrial process	Suitable

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42. Final Technical Specification

Category	Specification
Model	20LD650N0NNNCNW0WN
Base Catalog Number	20LD650
Brand	Allen-Bradley
Series	PowerFlex 700L
Product Type	Liquid-Cooled Adjustable-Frequency AC Drive
Frame	3A
Voltage Class	480 VAC
Input	Three Phase
Output Current	650 A class
Normal Duty	600 HP / 445 kW
Heavy Duty	440 HP / 325 kW
Normal Duty Overload	110% / 1 min, 150% / 3 sec
Heavy Duty Overload	150% / 1 min, 200% / 3 sec
PWM Frequency	4 kHz
Cooling	Liquid Cooled
DC Input	Available in applicable configuration
DC Input Rating	1250 A for specified DC-input configuration
Approx. Width	800–1,200 mm
Approx. Depth	600–1,000 mm
Approx. Height	1,800–2,200 mm
Approx. Weight	400–800 kg
Installation	Industrial Cabinet / Floor Installation
Main Applications	Large Pumps, Fans, Conveyors, Crushers, Mining, Steel, Cement, Process Machinery

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43. Five Recommended Related Models

Model	Series	Voltage	Frame	ND Rating	HD Rating	Current
20LD360	PowerFlex 700L	480 VAC	2	224 kW	175 kW	360 A
20LD650	PowerFlex 700L	480 VAC	3A	445 kW	325 kW	650 A
20LD1K2	PowerFlex 700L	480 VAC	3B	860 kW	630 kW	1250 A
20LC650	PowerFlex 700L	400 VAC class	3A	370 kW	270 kW	650 A
20LE800	PowerFlex 700L	600 VAC class	3B	650 kW	480 kW	800 A

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44. Five Same-Brand Popular Models

Model	Family	Voltage Class	Approx. Power Class	Main Use
25B-D017N114	PowerFlex 525	380–480 VAC	7.5 kW class	Compact machine drives
20F11NC022JA0NNNNN	PowerFlex 753	380–480 VAC	Medium	General industrial drives
20F11NC034JA0NNNNN	PowerFlex 753	380–480 VAC	Medium/High	Industrial machinery
20G1ANB140JA0NNNNN	PowerFlex 755	380–480 VAC	High	Advanced industrial applications
20G1ANC350JA0NNNNN	PowerFlex 755	380–480 VAC	High	Large industrial machinery

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45. Overall Product Description

The Allen-Bradley 20LD650N0NNNCNW0WN is a high-power liquid-cooled variable-frequency AC drive designed for large industrial motor applications.

Its base 20LD650 configuration is a Frame 3A, 650 A class PowerFlex 700L drive intended for 480 VAC systems.

The published motor ratings are approximately 600 HP / 445 kW for Normal Duty and 440 HP / 325 kW for Heavy Duty.

The drive’s liquid-cooled design is particularly important at this power level.

Rather than relying exclusively on large quantities of cabinet air to remove heat, the power electronics transfer heat into a liquid cooling circuit.

This allows the high-power section to operate with a high degree of thermal efficiency and can help reduce cabinet heat and ventilation requirements.

The product is well suited to large pumps, industrial fans, conveyors, crushers, mining equipment, steel-processing machinery, cement equipment, paper machinery and other large process systems.

Its Heavy Duty rating also makes it relevant to applications where short-duration torque requirements are high.

The combination of 650 A current capability, liquid cooling, high overload capacity and variable-frequency motor control makes this a distinctly high-power industrial drive rather than a general-purpose compact VFD.

For system designers, one of the main benefits is the ability to control large motors while maintaining a comparatively efficient thermal-management architecture.

For installation planning, the cooling system should be treated as an integral part of the drive installation.

Electrical protection, coolant circulation, heat-exchanger capacity, cabinet layout, motor cable selection and maintenance access should all be considered together.

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46. Final Summary

The 20LD650N0NNNCNW0WN can be summarized as follows:

• Brand: Allen-Bradley
• Product Series: PowerFlex 700L
• Product Family: Liquid-Cooled Adjustable-Frequency AC Drives
• Base Model: 20LD650
• Frame: 3A
• Voltage Class: 480 VAC
• Current Class: 650 A
• Normal Duty: 600 HP / 445 kW
• Heavy Duty: 440 HP / 325 kW
• Normal Duty Overload: 110% for 1 minute and 150% for 3 seconds
• Heavy Duty Overload: 150% for 1 minute and 200% for 3 seconds
• PWM Frequency: 4 kHz class
• Cooling: Liquid Cooled
• DC Input: Available in the applicable configuration
• Specified DC Input Rating: 1250 A
• Approximate Dimensions: 800–1,200 × 600–1,000 × 1,800–2,200 mm
• Approximate Weight: 400–800 kg
• Main Applications: Large pumps, fans, conveyors, crushers, mining equipment, steel-processing machinery, cement equipment, paper machinery and heavy industrial process systems

The main technical strengths of the 20LD650N0NNNCNW0WN are its high current capacity, liquid-cooled thermal architecture, high power density, variable-speed motor control and substantial overload capability.

It is particularly appropriate where a large motor must be controlled continuously and where conventional air-cooled drive technology would create excessive cabinet heat or require a very large ventilation system.

For final engineering, purchasing, replacement or installation work, the exact configured catalog number, motor nameplate data, electrical supply, cooling arrangement and mechanical drawing should be checked together before the equipment is specified.