Allen-Bradley 20G11JF960JN4NNNNN — PowerFlex 755 AC Drive

The 20G11JF960JN4NNNNN is a high-power AC variable frequency drive in the PowerFlex 755 series, designed for demanding three-phase motor-control applications where high output power, stable speed regulation, network connectivity, and flexible control are required.

This model belongs to the large-frame, air-cooled segment of the PowerFlex 755 family. It is rated for 690 VAC, three-phase input, with a nominal current rating of 960 A. Its published power ratings are approximately 1000 kW for light-duty operation, 900 kW for normal-duty operation, and 800 kW for heavy-duty operation.

The model uses forced-air cooling and an enclosure configuration corresponding to Type 12 / IP54, with an 800 mm deep MCC-style construction. It is particularly suited to large industrial motor applications rather than compact machine-building applications.

1. Product Identification

2. Model Number Interpretation

The catalog number 20G11JF960JN4NNNNN contains a number of configuration characters. It is not simply a model designation; the individual characters identify important electrical and mechanical options.

The important point is that the complete catalog number defines a particular factory configuration. Therefore, two PowerFlex 755 drives can look very similar while having different voltage, enclosure, current, braking, filtering, operator-interface, or environmental configurations.

3. Main Technical Parameters

The following table summarizes the principal parameters of the 20G11JF960JN4NNNNN.

Important dimensional note: the 800 mm value is the specified cabinet-depth classification. The complete shipping or installation dimensions depend on the packaged-drive configuration and enclosure arrangement. For engineering drawings, cabinet layout, lifting arrangements, and foundation design, the exact dimensional drawing for the specific build should be used rather than treating 800 mm as the complete enclosure dimensions.

The same caution applies to weight. Large Frame 9 packaged drives can vary in actual mass depending on cabinet construction, cooling equipment, options, and configuration. For preliminary equipment planning, approximately 700–800 kg is a reasonable engineering allowance, but the exact shipping weight should be confirmed from the equipment nameplate or final mechanical drawing.

4. Product Introduction

The PowerFlex 755 is a high-performance AC drive platform intended for applications where a conventional small or medium-power inverter is no longer sufficient.

The 20G11JF960JN4NNNNN sits near the high-power end of the PowerFlex 755 range. With a 690 VAC three-phase supply and a 960 A current rating, it is intended for large motors used in industrial plants, production lines, material-handling systems, process equipment, pumps, fans, compressors and other large rotating machinery.

Its 690 V architecture is particularly useful in high-power installations because increasing the operating voltage allows very high motor power to be delivered without requiring the same current levels that would be necessary at a lower voltage.

For large motors, this can have practical advantages for switchgear, cables, busbars, MCC equipment and overall electrical distribution.

The PowerFlex 755 platform also places considerable emphasis on integration with industrial automation systems. Embedded EtherNet/IP allows the drive to become part of a larger control architecture rather than operating as an isolated motor controller.

This makes the drive suitable for applications where speed, torque, current, alarms, operating status and other drive information need to be exchanged with a plant control system.

5. Product Application

5.1 Pumps

Large process pumps are one of the natural application areas for this class of drive.

The drive can regulate motor speed according to process demand instead of simply operating the motor at full speed and controlling flow through mechanical throttling.

For water treatment, chemical processing, district pumping, industrial cooling systems and similar applications, variable-speed control can help match motor output to actual process requirements.

5.2 Fans and Blowers

Large industrial fans and blowers frequently operate for long periods and can represent a significant portion of a plant’s electrical consumption.

A high-power variable-frequency drive can adjust fan speed according to airflow or pressure requirements.

This is particularly useful in ventilation systems, furnaces, kilns, air-handling systems, mining equipment and industrial exhaust systems.

5.3 Conveyors

Large conveyors require controlled acceleration, deceleration and speed regulation.

The PowerFlex 755 platform is suitable for large conveyor systems used in mining, bulk-material handling, ports, steel production, cement plants and other heavy industries.

Controlled acceleration can reduce mechanical shock on gearboxes, couplings, belts and conveyor structures.

5.4 Compressors

Large compressors can require substantial motor power, making a high-voltage, high-current drive an appropriate solution where variable-speed operation is required.

The drive can be integrated into a process-control system to coordinate compressor speed with pressure, flow or production requirements.

5.5 Mining Equipment

Mining applications frequently involve large motors, harsh operating environments and substantial mechanical loads.

Applications can include conveyors, crushers, pumps, fans, hoists and other large rotating machinery.

The high current and power capability of this drive make it appropriate for large motor installations where a compact low-power inverter would not be sufficient.

5.6 Cement and Building-Material Production

Cement plants and similar heavy-process industries contain many high-power motor loads.

Typical applications include:

• Raw-material conveyors
• Large fans
• Grinding systems
• Crushers
• Pumps
• Material-handling equipment
• Kiln-related auxiliary equipment
• Dust collection systems

The ability to integrate the drive with a plant automation system is especially useful in these applications.

5.7 Steel and Metal Processing

Large steel-processing lines often require precise and repeatable motor-speed control.

The PowerFlex 755 family can be applied to large motor loads in areas such as material handling, cooling, pumping, ventilation and process machinery.

6. Main Advantages

6.1 Very High Power Capability

The most obvious advantage of the 20G11JF960JN4NNNNN is its high power capacity.

With a 960 A rating and a maximum listed light-duty rating around 1000 kW, it is intended for applications where very large motors are involved.

This makes it fundamentally different from the smaller PowerFlex drives normally used in machine-level applications.

6.2 690 VAC Three-Phase Architecture

The 690 VAC rating is a major advantage for high-power industrial installations.

For a given amount of motor power, a higher operating voltage can reduce the current required compared with a lower-voltage system.

This can help reduce the scale of conductors and associated distribution equipment, although the complete electrical design must still account for starting conditions, fault levels, cable length, harmonics and protection requirements.

6.3 Embedded EtherNet/IP

The integrated EtherNet/IP capability makes the drive suitable for modern industrial control architectures.

Instead of relying entirely on hardwired signals, drive information can be exchanged with the automation system through the industrial network.

Typical information can include:

• Speed reference
• Actual speed
• Current
• Torque
• Drive status
• Fault information
• Warning information
• Start/stop commands
• Parameter information

This can simplify system integration and improve diagnostic capabilities.

6.4 Large-Scale Industrial Construction

The 800 mm deep MCC-style configuration is designed around large industrial installations.

This type of construction is more appropriate for plant-level equipment than for compact control cabinets.

The large physical format also provides space for high-power electrical components, cooling arrangements and associated protection equipment.

6.5 Forced-Air Cooling

At this power level, thermal management is critical.

The forced-air cooling architecture allows the drive to dissipate the substantial heat generated during high-power operation.

The cooling system uses a centrifugal fan arrangement, with the published configuration indicating approximately 1,805 m³/h of airflow.

Correct cabinet ventilation and maintenance of cooling passages are important to maintaining reliable operation.

6.6 Flexible Industrial Control

The PowerFlex 755 family is designed as a flexible drive platform rather than a basic frequency converter.

Depending on configuration and application, it can be incorporated into systems requiring speed control, torque control, process control, feedback, network control and more advanced motor-management functions.

6.7 Suitable for Large Motors

The 960 A output capability gives this model a substantial operating range.

It can be considered for large motors in applications where conventional 200 A, 300 A or 500 A drives would be insufficient.

This makes it especially relevant to large process plants and heavy industrial machinery.

7. Product Selection Considerations

Although the 20G11JF960JN4NNNNN is a powerful drive, it should not be selected solely by looking at the motor’s nameplate kW.

A proper selection should consider:

1. Motor rated voltage
2. Motor rated current
3. Motor power
4. Normal-duty or heavy-duty operating requirements
5. Overload requirements
6. Starting torque
7. Required acceleration and deceleration
8. Ambient temperature
9. Installation altitude
10. Enclosure requirements
11. Harmonic requirements
12. Motor cable length
13. Required braking capability
14. Communication requirements
15. Required safety functions
16. Cooling and ventilation conditions
17. Available fault current
18. Required upstream protection
19. Maintenance access
20. Physical cabinet space

For a large 690 V motor, the motor’s actual full-load current should be compared directly with the drive’s applicable duty rating.

8. Five Related Models in the Same PowerFlex 755 Family

The following models are useful comparison points because they belong to the same PowerFlex 755 family and are close to the requested model in electrical rating or physical configuration.

These models are particularly useful when the application requires a similar mechanical platform but a different voltage or current capacity.

The 20G11JF1K0JN4NNNNN is a natural step upward from the 960 A model because it retains the 690 V class while increasing current capacity.

For a 480 V system, the 20G11JD1K0JN4NNNNN is a more relevant comparison.

For a 400 V system, the 20G11JC1K0JN4NNNNN and 20G11JC1K2JN4NNNNN provide higher-current alternatives.

9. Five Popular Models from the Same Brand

The following models are representative choices from the same Allen-Bradley product ecosystem. They cover different power levels and applications and can be useful when the required motor power is significantly lower than that of the 960 A Frame 9 drive.

Because large-frame drives are highly configurable, physical dimensions and shipping weight can change with enclosure, braking, HIM, filtering and other options. The figures above should therefore be regarded as planning-level values rather than certified shipping dimensions.

10. Comparison Between the Recommended Models

For a quick engineering comparison, the most important differences are voltage and current.

11. Why the 20G11JF960JN4NNNNN Is Attractive

The strongest feature of this model is the combination of 690 V operation, 960 A current capacity, large power capability and industrial network integration.

For a plant operating a large 690 V motor, this combination can make the drive a very practical choice.

The model is also well suited to centralized industrial installations where the drive is part of a larger MCC or automation system.

Another important advantage is the PowerFlex 755 platform itself. Using the same drive family across different motor sizes can simplify engineering standards, operator training, spare-parts planning and maintenance procedures.

For a plant with multiple PowerFlex 755 installations, technicians can become familiar with a common control philosophy and similar diagnostic procedures.

12. Typical Applications by Motor Size

13. Installation and Maintenance Points

Because this is a very large Frame 9 drive, installation should be treated as an industrial electrical-equipment project rather than a conventional small inverter installation.

The first issue is physical handling.

A drive of this size and weight requires appropriate lifting and transportation equipment. The installation area should be prepared before delivery, and the available floor loading should be checked.

The second issue is ventilation.

Forced-air cooling depends on adequate airflow. Dust, dirt, blocked air passages and deteriorated cooling fans can significantly affect thermal performance.

The third issue is electrical protection.

The incoming supply, disconnect equipment, fuses or circuit protection, grounding system, cable arrangement and short-circuit rating need to be designed around the actual installation.

The fourth issue is motor compatibility.

The motor insulation system, cable length, grounding arrangement and operating duty should be reviewed when installing a high-power PWM drive.

The fifth issue is control-system integration.

Where EtherNet/IP is used, the drive should be incorporated into the plant network architecture with suitable addressing, communication configuration and control strategy.

14. Overall Evaluation

The 20G11JF960JN4NNNNN is best viewed as a large industrial PowerFlex 755 variable-frequency drive for high-power 690 V three-phase motors.

Its 960 A output rating, 1000 kW light-duty capability, 900 kW normal-duty capability, 800 kW heavy-duty capability, Frame 9 construction, forced-air cooling, IP54 / Type 12 enclosure configuration, and embedded EtherNet/IP make it suitable for large-scale process and material-handling applications.

It is not intended to be a compact machine-mounted inverter. Its strengths are instead found in large industrial systems where motor power, reliability, communication, maintainability and integration with plant automation are more important than minimizing cabinet size.

For applications involving a large 690 V motor, the model is especially attractive when the required motor current is close to the 960 A range and when an industrial Ethernet-connected drive is preferred.

The closest alternatives should generally be selected according to the motor voltage first, followed by motor full-load current, duty requirement, enclosure requirement, braking requirement, cooling arrangement and available installation space.

In practical terms, the 20G11JF960JN4NNNNN can be positioned as a high-capacity, heavy-industrial drive for applications such as large pumps, fans, conveyors, compressors, mining equipment, cement machinery, steel-processing equipment and other large rotating loads.

Note: For the dimensions and weight, the exact final mechanical configuration should be checked against the specific equipment drawing/nameplate before procurement, transportation, foundation design or cabinet fabrication. The model is a large Frame 9 product, and actual overall dimensions and mass can vary with the packaged configuration.