Allen-Bradley 20G11BF960JN0NNNNN — PowerFlex 755 AC Drive Detailed Product Overview

1. Product Identification

Model: 20G11BF960JN0NNNNN

Brand: Allen-Bradley

Product Series: PowerFlex 755

Product Family: PowerFlex 750-Series AC Drives

Product Type: Air-Cooled AC Variable Frequency Drive / AC Packaged Drive

Frame Size: Frame 9

Input Voltage: 690 VAC

Input Phase: 3 Phase

Rated Current: 960 A

Normal-Duty Power Rating: 900 kW

Heavy-Duty Power Rating: 800 kW

Light-Duty Power Rating: 1000 kW

Enclosure Style: Type 1, IP20, 600 mm Deep MCC Style

Cooling: Forced Air / Air Cooled

Communication: Embedded EtherNet/IP

Input Configuration: AC Input with DC Terminals

Filtering: Filtered, with CM jumper installed

Dynamic Braking: None

HMI: Blank configuration, no HIM installed

Product Status: Active configuration within the PowerFlex 755 product family.

2. Product Introduction

The 20G11BF960JN0NNNNN is a high-power PowerFlex 755 AC drive designed for demanding industrial motor-control applications. It belongs to the PowerFlex 750-Series and uses a high-current Frame 9 configuration intended for large motors and high-capacity mechanical systems.

With a rated current of 960 A and a nominal input voltage of 690 VAC, three-phase, this model is positioned well above the power range of conventional small and medium industrial frequency converters. Its application focus is large-scale equipment where stable motor speed control, torque management, process regulation and integration with industrial automation systems are important.

The model supports up to 1000 kW in light-duty service, 900 kW in normal-duty service and 800 kW in heavy-duty service, depending on the actual load profile and application requirements.

The air-cooled construction uses forced ventilation to remove heat generated by the power electronics. The Frame 9 design provides a high-current architecture suitable for large motors while maintaining the modular design philosophy associated with the PowerFlex 750-Series.

The model also includes embedded EtherNet/IP, which makes it suitable for integration into an industrial control network without requiring an external communication adapter for basic EtherNet/IP connectivity.

The 600 mm deep MCC-style enclosure arrangement is particularly useful for industrial electrical rooms, motor-control centers and centralized drive installations where standardized cabinet arrangements are preferred.

3. Detailed Technical Parameters

Important note regarding dimensions and weight: for a Frame 9 packaged drive of this size, the final shipping and installation dimensions can vary according to cabinet configuration, installed options, incoming/output arrangement and packaging. The values above should therefore be treated as engineering reference values rather than fabrication dimensions. For cabinet design, lifting arrangements and foundation work, the exact dimensional drawing for the specific build should be used.

4. Meaning of the Model Configuration

The model number 20G11BF960JN0NNNNN contains a substantial amount of configuration information.

The 20G prefix identifies the PowerFlex 755 AC-drive product configuration.

The 11 portion is associated with the 755-series configuration family.

The BF section corresponds to the high-power voltage/current configuration represented by this particular product variant.

The 960 identifies the very high current rating of 960 A.

The J configuration is associated with the later/current packaged-drive configuration.

The N0NNNNN portion represents additional configuration selections, including the absence of certain optional hardware and the specified blank/no-HIM arrangement.

For procurement, replacement and engineering purposes, the complete catalog number should always be treated as one complete part number. Two drives that look similar externally can have significantly different electrical ratings, filtering arrangements, braking functions, communication options or enclosure configurations.

5. Product Applications

5.1 Large Pumps

The PowerFlex 755 platform is well suited to large pump systems where motor speed needs to follow process demand.

Instead of continuously operating a motor at full speed and regulating flow using mechanical throttling, a variable-frequency drive can regulate motor speed directly. This can provide more flexible process control and can reduce unnecessary mechanical losses under suitable operating conditions.

Typical examples include:

• Water-treatment pumping systems
• Industrial process pumps
• Cooling-water pumps
• Large circulation pumps
• Raw-water pumps
• Mining-water systems
• Chemical-process pumps
• Municipal-scale pumping equipment

For large pumps, the 960 A rating gives this model a significant power-handling capability.

5.2 Large Fans and Blowers

Large industrial fans and blowers often require variable-speed operation.

The drive can regulate the motor according to airflow or process requirements, making it useful in:

• Industrial ventilation
• Furnace systems
• Cement plants
• Steel-processing facilities
• Mining ventilation
• Power-generation auxiliary systems
• Large dust-collection systems
• Industrial combustion-air systems

For fan applications, variable-speed control can also help reduce mechanical stress during startup compared with direct full-voltage motor starting.

5.3 Conveyors

Large conveyors are another important application.

The PowerFlex 755 architecture is suitable for conveyor systems requiring controlled acceleration, controlled deceleration and adjustable operating speed.

Potential applications include:

• Mining conveyors
• Ore-handling systems
• Bulk-material conveyors
• Cement conveyors
• Port material-handling systems
• Aggregate-processing systems
• Large warehouse material-handling equipment

For long conveyors, coordinated motor control can be especially important because uncontrolled starting can create substantial mechanical shock.

5.4 Compressors

Large industrial compressors can require substantial motor power, particularly in petrochemical, manufacturing and process industries.

A high-capacity drive such as the 20G11BF960JN0NNNNN can be considered where the compressor motor and process-control requirements fall within its electrical range.

Potential applications include:

• Process compressors
• Industrial air systems
• Gas-processing equipment
• Large refrigeration systems
• Chemical-process compressors

Compressor applications require careful consideration of acceleration, torque, speed range, cooling, harmonic performance and motor characteristics.

5.5 Industrial Process Machinery

The PowerFlex 755 platform is also appropriate for large rotating machinery used in continuous industrial processes.

Examples include:

• Mills
• Mixers
• Large agitators
• Extrusion equipment
• Material-processing equipment
• Large machine tools
• Industrial production lines
• Heavy-duty rotating machinery

The major advantage is the ability to integrate motor speed control with a broader industrial automation system.

6. Main Product Advantages

6.1 Very High Power Capacity

One of the most obvious advantages of the 20G11BF960JN0NNNNN is its exceptionally high current capacity.

At 960 A, it is designed for large industrial motors rather than conventional small machinery.

The power ratings reach approximately:

• 1000 kW light duty
• 900 kW normal duty
• 800 kW heavy duty

This makes it appropriate for large mechanical loads where lower-power drives would not be adequate.

6.2 690 VAC Three-Phase Design

The 690 VAC three-phase architecture is widely associated with large industrial motor installations.

Using a higher motor voltage for high-power equipment can help manage current levels compared with achieving the same power at a lower voltage.

This makes the 690 V class attractive for large industrial motors, particularly where the plant electrical system is designed around medium/high-voltage-class low-voltage motor systems.

6.3 Embedded EtherNet/IP

The built-in EtherNet/IP capability is an important advantage for modern industrial automation.

It allows the drive to become part of an industrial control network and exchange information with supervisory and control equipment.

Typical information can include:

• Speed reference
• Actual speed
• Current
• Torque
• Drive status
• Fault information
• Alarm information
• Start/stop commands
• Operating parameters
• Diagnostic information

This can simplify system architecture compared with adding a separate communication interface.

6.4 PowerFlex 755 Platform

The PowerFlex 755 platform is designed for applications where more advanced control and system integration are required.

Compared with basic-purpose drives, the platform provides a broader foundation for:

• High-power motor control
• Industrial networking
• Process integration
• Advanced diagnostics
• Safety-related configurations
• Application-specific options
• Large machinery control

This makes the product suitable for demanding industrial automation projects.

6.5 Forced-Air Cooling

The air-cooled architecture is relatively straightforward from a maintenance perspective.

The cooling system uses forced ventilation to remove heat from the power section.

For a drive with this level of power, thermal management is critical. Proper cabinet ventilation, clean cooling air, fan condition and installation clearances all have a direct effect on equipment reliability.

6.6 MCC-Style Installation

The 600 mm deep MCC-style configuration can be advantageous when integrating the drive into centralized motor-control infrastructure.

This type of arrangement is especially useful for:

• Industrial electrical rooms
• Centralized motor-control systems
• Large production facilities
• Process plants
• Mining facilities
• Water-treatment plants
• Large manufacturing facilities

6.7 Flexible Load Ratings

Having different light-duty, normal-duty and heavy-duty ratings allows the drive to be selected according to the actual load profile.

This is important because motor applications do not all have the same torque requirements.

For example, a fan may have a different load characteristic from a conveyor, crusher or high-torque process machine.

Therefore, selecting the drive based solely on motor kW can be misleading. Motor current, overload requirement, acceleration requirement, duty cycle and environmental conditions should also be evaluated.

7. Installation and Engineering Considerations

Because the 20G11BF960JN0NNNNN is a very high-power drive, installation should not be approached in the same way as a small cabinet-mounted frequency converter.

The electrical distribution system must be properly coordinated with the drive input requirements.

Particular attention should be given to:

• Incoming power capacity
• Short-circuit current
• Protection equipment
• Cable sizing
• Busbar sizing
• Grounding
• Harmonic considerations
• EMC requirements
• Cooling-air circulation
• Cabinet ventilation
• Motor cable length
• Motor insulation
• Motor grounding
• Maintenance access
• Lifting and transportation
• Cabinet clearances

The 960 A current level means that conductor and busbar selection becomes a major engineering issue.

The mechanical installation is also important because a Frame 9 packaged drive is a substantial piece of industrial electrical equipment. Floor loading, cabinet positioning and lifting arrangements should therefore be evaluated before installation.

8. Recommended Same-Series / Closely Related Models

The following models are useful comparison candidates because they are closely associated with the PowerFlex 755 high-power family. Exact configuration suffixes can change the filtering, input arrangement, braking and option configuration, so they should not be considered automatic drop-in replacements.

Selection note: The first four alternatives mainly represent different current/power levels within the same 690 V PowerFlex 755 high-power configuration. The JN2 and JN4 versions have different configuration suffixes and should therefore be checked carefully against the original drive’s filtering, input, output, braking and option requirements before replacement.

9. Five Same-Brand Popular Models for Broader Comparison

For a broader product comparison, the following models represent different positions within the same brand’s industrial drive portfolio.

The last five entries represent different power levels and product architectures, so they are not direct electrical replacements for the 20G11BF960JN0NNNNN. They are better viewed as alternatives when selecting a drive platform for a new project.

For an actual replacement, the most important factors are voltage, motor current, duty rating, enclosure, input configuration, braking, filtering, communication, motor-control method and cabinet dimensions.

10. PowerFlex 755 Compared With Smaller Drives

The 20G11BF960JN0NNNNN is fundamentally different from compact drives such as the PowerFlex 523 or PowerFlex 525.

A compact drive is generally intended for smaller motors and machine-level applications.

The PowerFlex 755 is aimed at larger industrial equipment where:

• Motor power is high
• Current is high
• Process control is important
• Network integration is required
• Diagnostic information is valuable
• The equipment operates continuously
• Controlled acceleration is required
• Mechanical load characteristics are complex

The large Frame 9 architecture also makes the installation more comparable to a centralized industrial power-control system than a simple machine-mounted VFD.

11. Typical Application Selection Guide

12. Key Advantages at a Glance

13. Product Selection Summary

The 20G11BF960JN0NNNNN is best understood as a large-capacity, 690 VAC, three-phase PowerFlex 755 industrial AC drive intended for large motors and demanding continuous-duty applications.

Its most important specifications are its 960 A rated current, 690 VAC three-phase input, Frame 9 construction, 1000 kW light-duty rating, 900 kW normal-duty rating and 800 kW heavy-duty rating.

The combination of high current capacity, forced-air cooling, 600 mm deep MCC-style construction and embedded EtherNet/IP makes it particularly suitable for large industrial plants where the drive needs to operate as part of a broader automation system.

For applications involving pumps, fans, conveyors, compressors and other large rotating machinery, the product offers a strong combination of power capacity and control-system integration.

The most important point when selecting an alternative is that the model number should not be compared by current alone. A replacement also needs to match the motor voltage, duty rating, overload requirement, input arrangement, filtering, braking requirements, communication requirements, enclosure arrangement and physical installation dimensions.

For a direct replacement of 20G11BF960JN0NNNNN, the closest candidates are generally other PowerFlex 755 Frame 9, 690 V, high-current configurations, rather than smaller PowerFlex families.

Because this is a very high-power drive, the dimensions and weight should be verified against the exact mechanical drawing and build configuration before procurement, cabinet fabrication, lifting or installation. The approximate figures above are suitable for preliminary product comparison, but should not be used as the sole basis for structural or electrical engineering.