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

20G1ALC650JN0NNNNN PowerFlex 755 AC Drive — Detailed Product Profile, Specifications, Applications and Related Models

The 20G1ALC650JN0NNNNN is a high-power air-cooled AC variable-frequency drive designed for large industrial motor-control applications.

It belongs to the PowerFlex 755 series within the PowerFlex 750-Series family. The drive is designed for a 400 VAC, three-phase electrical system and has a 650 A nominal output-current class.

Its main published power ratings are 400 kW Light Duty, 355 kW Normal Duty, and 315 kW Heavy Duty. The unit uses a Frame 8 construction, forced-air cooling, an IP20 / Type 1 enclosure arrangement, an 800 mm deep MCC-style configuration, and embedded EtherNet/IP communication.

The most important difference between this model and similarly rated configurations is the specific option coding represented by JN0. This configuration has a CM jumper installed, no dynamic braking, and a blank/no-HIM arrangement.

---

1. Basic Product Information

The above configuration places this model in the large-drive category. It is designed for substantially larger motors than compact variable-frequency drives and is normally installed in a dedicated industrial electrical area, MCC lineup or large drive cabinet.

---

2. Brand

The brand of the product is Allen-Bradley.

Allen-Bradley is the brand under which the PowerFlex drive family is marketed.

For industrial users, the brand is commonly associated with PLC systems, motor-control equipment, industrial networking, variable-frequency drives and other automation products.

For this particular model, the relevant product family is PowerFlex, while the specific drive series is PowerFlex 755.

---

3. Product Series

The 20G1ALC650JN0NNNNN belongs to the PowerFlex 755 series.

The PowerFlex 755 is part of the broader PowerFlex 750-Series platform.

This series is designed for applications where a conventional small VFD is not sufficient and where the drive may need to provide high-power motor control, network communication, diagnostics, flexible configuration and integration with a larger industrial control system.

The 650 A Frame 8 version is positioned toward the upper end of the power range and is intended for large industrial motors.

---

4. Product Model Explanation

20G1ALC650JN0NNNNN

The complete model number is important when identifying this drive.

It is not enough to describe the product simply as a “650 A PowerFlex 755,” because different 650 A configurations can have different option combinations.

The catalog number identifies the specific configuration of the drive.

In this model, the key characteristics include:

• PowerFlex 755 platform
• Air-cooled construction
• 400 V class
• 650 A current class
• Frame 8
• 800 mm deep MCC-style enclosure
• AC input with precharge
• No DC terminals
• Filtered configuration
• CM jumper installed
• No dynamic braking
• Blank/no-HIM configuration
• Embedded EtherNet/IP

This is particularly important when replacing an existing drive.

A replacement should be selected according to the complete catalog configuration rather than only the voltage, kW or current rating.

---

5. Main Electrical Parameters

The 650 A rating is the main current class of the drive.

The drive is rated at different motor power levels depending on the application duty.

For Light Duty applications, the rating reaches approximately 400 kW.

For Normal Duty applications, the rating is approximately 355 kW.

For Heavy Duty applications, the rating is approximately 315 kW.

These different ratings are important because the thermal and overload requirements of a motor can vary considerably depending on the type of machine being driven.

---

6. Light Duty, Normal Duty and Heavy Duty

The duty classification should be selected according to the actual mechanical load.

A large centrifugal fan may have a very different operating profile from a conveyor.

A large pump may operate relatively smoothly, while a material-handling machine may repeatedly accelerate a high-inertia load.

Therefore, the motor’s kW rating should not be used as the only selection criterion.

Motor current, overload requirements, starting torque, acceleration time, operating cycle and environmental conditions should also be considered.

---

7. Physical Specifications

The physical dimensions of a large Frame 8 drive are an important part of system design.

Approximate Overall Dimensions

2453 mm × 600 mm × 800 mm

Approximate Weight

623 kg

The dimensions and weight place this drive in a completely different physical category from compact machine-mounted VFDs.

Transportation, lifting, floor loading, ventilation and service access should all be considered before installation.

The exact mechanical arrangement can vary according to the complete equipment configuration, so final engineering should use the mechanical drawing associated with the actual unit.

---

8. Product Introduction

The 20G1ALC650JN0NNNNN is a large industrial AC variable-frequency drive intended to control high-power three-phase motors.

Its main purpose is to control motor speed and operating conditions by regulating the electrical frequency and voltage supplied to the motor.

A conventional fixed-speed motor generally runs at a speed determined by its electrical supply and motor characteristics.

A variable-frequency drive provides much greater control.

The motor can accelerate gradually, operate at different speeds and decelerate according to the requirements of the machine.

This makes the drive particularly useful for equipment where the required motor speed changes during operation.

Typical examples include pumps, fans, blowers, conveyors and large process machines.

---

9. How the Drive Works

The drive receives three-phase AC electrical power at the input.

The power is converted within the drive’s power-conversion system and then supplied to the motor as controlled electrical power.

By changing the output frequency, the drive changes the operating speed of the AC motor.

The drive can also regulate the voltage and other motor-control parameters to provide the required operating characteristics.

The control system can therefore manage:

• Motor starting
• Motor acceleration
• Motor operating speed
• Motor deceleration
• Process speed reference
• Motor operating status
• Fault and warning conditions

For a large industrial plant, these functions can be integrated into the overall automation system through the drive’s communication capability.

---

10. Embedded EtherNet/IP

The 20G1ALC650JN0NNNNN includes embedded EtherNet/IP.

This is an important feature for industrial automation.

Instead of operating as an isolated motor controller, the drive can participate in a networked control system.

Typical information exchanged between the drive and control system can include:

This type of integration is especially useful in large production facilities where numerous drives are connected to a centralized automation system.

---

11. Input Configuration

The model uses an AC input with precharge.

The drive does not have DC terminals in this configuration.

The precharge arrangement is important for a high-power drive because the internal DC-link capacitors need to be charged in a controlled manner when the drive is energized.

This reduces the possibility of an uncontrolled initial charging current.

The absence of DC terminals also means that this particular configuration should not automatically be considered suitable for every common-DC-bus application.

---

12. Filtering

The model uses a filtered configuration.

Variable-frequency drives use high-speed semiconductor switching.

This switching produces electrical noise and high-frequency components that can affect nearby equipment if the overall installation is not designed correctly.

Filtering, grounding, motor-cable selection and cable routing therefore become important parts of the installation.

For large industrial systems, the drive installation should be designed together with the motor cables, control cables and communication network rather than treating each item separately.

---

13. CM Jumper Installed

The catalog configuration specifies the CM jumper as installed.

This is an important configuration detail.

Common-mode capacitor configuration can affect the electrical relationship between the drive and ground.

Therefore, a model with the CM jumper installed should not automatically be treated as identical to a similar model where the jumper has been removed.

This is one reason why the complete catalog number should be checked when replacing a drive.

---

14. No Dynamic Braking

The 20G1ALC650JN0NNNNN is configured with no dynamic braking.

This means the standard catalog configuration does not include a dynamic-braking transistor arrangement.

For applications with high-inertia loads or frequent rapid deceleration, braking requirements should be evaluated separately.

Examples include:

• Large conveyors
• High-inertia rotating machines
• Material-handling equipment
• Rapid cycling machinery
• Large mechanical systems requiring short stopping times

If the application requires substantial regenerative energy management, the drive configuration and braking architecture need to be evaluated before selection.

---

15. Blank / No HIM

This model uses a Blank / No HIM configuration.

HIM means Human Interface Module.

A drive with no HIM does not have the same local keypad arrangement as configurations supplied with a dedicated operator interface.

This configuration can be appropriate for centralized systems where operators interact with the drive through a PLC, HMI or supervisory control system.

It can also be useful when the drive is installed in a restricted-access electrical room and local keypad operation is not required.

---

16. Cooling System

The drive uses forced-air cooling.

At 650 A, the drive contains high-power semiconductor components that generate significant heat.

The cooling system removes heat from the power electronics and transfers it to the surrounding environment.

Proper airflow is therefore essential.

The installation should provide sufficient ventilation around the drive and should prevent excessive dust accumulation.

Important considerations include:

• Airflow
• Ambient temperature
• Cabinet ventilation
• Fan condition
• Air passages
• Filter condition
• Room temperature
• Maintenance access

A high-power drive should not be installed in a location where the cooling airflow is restricted.

---

17. Enclosure and Protection

The model is specified as Type 1 / IP20.

This type of protection is intended for suitable indoor industrial electrical environments.

It does not mean that the drive can be directly exposed to rain, water spray or uncontrolled outdoor conditions.

The surrounding cabinet, electrical room or MCC installation should provide the environmental protection required by the application.

Particular attention should be given to:

• Dust
• Moisture
• Condensation
• Corrosive atmospheres
• High ambient temperature
• Conductive contamination

---

18. Product Applications

Large Pumps

Large pumps are one of the most common applications for high-power variable-frequency drives.

The drive can regulate motor speed according to the required flow and pressure.

Typical applications include:

• Water transfer
• Cooling-water circulation
• Industrial process pumping
• Water treatment
• Large circulation systems

---

Large Fans

Large industrial fans can require motors with power ratings in the hundreds of kilowatts.

The drive can regulate fan speed according to the required airflow.

This can be useful for industrial ventilation, process-air systems and large air-handling equipment.

---

Blowers

Large blowers may need different operating speeds depending on production conditions.

The drive can provide adjustable speed and integrate blower operation with the plant control system.

---

Conveyors

Large conveyors can place significant demands on the motor during acceleration.

The drive can provide controlled acceleration and deceleration.

This can reduce sudden mechanical loading on the conveyor, gearbox and motor.

---

Feeders

Industrial feeders often need adjustable speed to control material flow.

A variable-frequency drive can allow the feeder speed to be changed according to production requirements.

---

Material-Handling Equipment

Large material-handling systems can use high-power motors for:

• Belt conveyors
• Transfer systems
• Bulk-material handling
• Industrial transport systems
• Production-line conveying

---

Process Machinery

Large industrial machines can require different motor speeds during different production stages.

The drive allows the motor speed to be changed without mechanically changing the motor itself.

---

19. Application Comparison

---

20. Main Product Advantages

20.1 High Current Capacity

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

This is the most obvious reason to use this type of Frame 8 drive instead of a compact VFD.

---

20.2 High Motor Power

The Light Duty rating reaches approximately 400 kW.

The Normal Duty rating is approximately 355 kW.

The Heavy Duty rating is approximately 315 kW.

This provides a wide range of motor applications within one drive configuration.

---

20.3 Multiple Duty Ratings

The three duty classifications allow engineers to match the drive to the actual mechanical load.

This is particularly useful because industrial machines can have very different overload requirements.

---

20.4 Industrial Communication

Embedded EtherNet/IP allows the drive to be integrated into a larger automation system.

This is particularly useful for plants with centralized monitoring and control.

---

20.5 Large Frame Architecture

Frame 8 construction provides the physical space necessary for high-power electrical components and cooling equipment.

---

20.6 Controlled Acceleration

The drive can gradually accelerate a motor instead of applying full operating speed immediately.

This can reduce mechanical stress.

---

20.7 Controlled Deceleration

The drive can control motor deceleration according to programmed requirements.

This can improve process control and reduce abrupt mechanical stopping.

---

20.8 Centralized Monitoring

Drive status, operating conditions and diagnostic information can be integrated into the larger automation architecture.

---

21. Five Related Models in the Same Series

The following models are closely related PowerFlex 755 configurations and are useful for comparison with the 20G1ALC650JN0NNNNN.

The 567 A, 650 A, 750 A and 770 A configurations are particularly close in the 400 V class.

The 710 A model is a different voltage class and should therefore be regarded as a related model rather than an automatic replacement.

---

22. Related Model Physical Parameters

The 400 V Frame 8 IP20 MCC-style models generally occupy a large cabinet envelope.

However, the final mechanical dimensions and shipping weight should be confirmed against the actual configuration when detailed installation drawings are prepared.

---

23. Five Related Models from the Same Brand

The following products cover different parts of the same brand’s drive portfolio.

These models have significantly different physical and electrical characteristics.

The smaller models are intended for smaller motors and machine-level applications.

The PowerFlex 753 and PowerFlex 755 families are intended for substantially larger industrial applications.

---

24. Same-Brand Model Parameter Comparison

The 20G1ALC650JN0NNNNN is intended for the highest-power applications among these examples.

It is not simply a larger version of a compact machine drive; its physical installation, electrical supply and cooling requirements are substantially different.

---

25. Dimensions and Weight Comparison

The large physical size of the PowerFlex 755 Frame 8 configuration should be considered during the earliest stage of electrical-room and equipment-layout planning.

---

26. Installation Requirements

The 20G1ALC650JN0NNNNN is not intended to be treated like a small cabinet-mounted drive.

Its approximately 623 kg mass requires appropriate handling and support.

Its approximately 2453 mm height also requires sufficient vertical clearance.

The following points should be checked before installation.

---

27. Maintenance Considerations

A large air-cooled drive requires regular maintenance.

The cooling system should be kept clean and unobstructed.

Important maintenance items include:

Because the drive can operate at hundreds of amperes, maintenance of high-current electrical connections is particularly important.

---

28. Typical Industries

The exact suitability depends on the motor, load characteristics, environmental conditions and complete drive configuration.

---

29. Practical Product Selection Checklist

Before purchasing or replacing this model, the following information should be checked.

---

30. Comparison of the Five Closely Related Models

The 650 A model provides a useful middle point between the lower 567 A configuration and the higher 750/770 A configurations.

The 770 A configuration provides a higher Heavy Duty power rating, while the 750 A configuration provides a higher Light Duty and Normal Duty capacity.

---

31. Key Differences Between 20G1ALC650JN0NNNNN and Similar Configurations

This comparison illustrates why the entire catalog number matters.

The models may look similar from the outside, but individual configuration codes can represent meaningful differences.

---

32. Product Advantages in Industrial Systems

The drive offers a combination of high-power motor control and industrial network integration.

For a large production facility, this can simplify the control architecture.

A large pump, for example, can receive its speed reference from the central automation system.

The same system can monitor motor current and operating status.

If the drive detects a fault, the information can be transmitted to the control system for alarm handling and maintenance.

This approach is particularly useful where many large motors are distributed across a production facility.

---

33. Why the Frame 8 Configuration Is Important

Frame 8 is not simply a physical designation.

The large frame is associated with the higher current and power levels of the PowerFlex 755 platform.

A 650 A drive requires substantial power-conversion components, cooling capacity and electrical connection space.

The large frame therefore provides room for the equipment required to handle this level of electrical power.

The result is a drive that is physically much larger than small industrial VFDs.

---

34. Why the 650 A Rating Matters

The current rating determines how much electrical current the drive can deliver to the motor under its applicable operating conditions.

A motor with a large kW rating can require a very high current, particularly at lower voltage.

For this reason, motor selection should always consider:

• Motor voltage
• Motor current
• Motor power
• Motor frequency
• Motor speed
• Motor overload
• Starting torque
• Acceleration requirements
• Duty cycle

Simply matching the motor kW to the drive kW is not sufficient.

---

35. Overall Technical Summary

---

36. Final Product Overview

The 20G1ALC650JN0NNNNN is a high-power PowerFlex 755 AC variable-frequency drive designed for large industrial motor applications.

It operates in the 400 VAC three-phase class and has a 650 A nominal current rating.

Its power capability is approximately 400 kW for Light Duty, 355 kW for Normal Duty and 315 kW for Heavy Duty.

The drive uses a Frame 8, forced-air-cooled construction with an IP20 / Type 1 enclosure and an 800 mm deep MCC-style arrangement.

The approximate physical dimensions are 2453 mm high × 600 mm wide × 800 mm deep, with an approximate weight of 623 kg.

The large physical size reflects the electrical power level of the equipment.

It is intended for proper industrial electrical installations where adequate floor support, ventilation, cable space, lifting equipment and maintenance access are available.

The embedded EtherNet/IP interface makes the drive suitable for networked industrial automation.

The drive can be integrated into a centralized control architecture where motor speed, operating status, current, warnings and faults can be monitored by the plant control system.

The JN0 configuration is also significant. This particular model is specified with no dynamic braking, filtered input, CM jumper installed, and a blank/no-HIM configuration.

These details distinguish it from other 650 A configurations that may appear very similar based only on their voltage and power ratings.

The drive is particularly applicable to large pumps, fans, blowers, conveyors, feeders, material-handling equipment, water systems and process machinery.

Its main practical advantages are its high current capacity, large motor-power capability, multiple duty ratings, industrial network integration, controlled acceleration and deceleration, large Frame 8 construction and suitability for centralized industrial automation.

For replacement or new-project selection, the complete catalog number should be checked together with the motor nameplate, motor current, motor power, duty cycle, overload requirement, braking requirement, environmental conditions, communication requirements and physical installation space.

In short, 20G1ALC650JN0NNNNN is a large industrial PowerFlex 755 drive intended for applications where a compact VFD is not sufficient and where hundreds of kilowatts of controlled AC motor power are required.