20G11BC1K5JN0NNNNN — PowerFlex 755 High-Power AC Drive Detailed Product Profile

1. Product Overview

The 20G11BC1K5JN0NNNNN is a high-power air-cooled AC variable frequency drive belonging to the PowerFlex 755 series.

It is designed for large three-phase industrial motors and is positioned toward applications that require high output current, substantial motor power, reliable speed regulation, industrial networking, and flexible motor-control functions.

This model is a 400 V class, 3-phase, Frame 9 drive with a nominal output current of 1,480 A. Its rated power is approximately 850 kW under Normal Duty (ND) and 710 kW under Heavy Duty (HD).

The unit uses an IP20 / Type 1, 600 mm deep MCC-style construction and is air cooled. It also includes an embedded EtherNet/IP interface, making it suitable for integration into industrial automation systems.

The model is particularly suitable for large pumps, fans, blowers, conveyors, material-handling equipment, mining machinery, process equipment, and other large industrial motor applications.

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2. Brand and Product Series

The PowerFlex 755 family is an architecture-level industrial drive platform. It is intended for applications where the drive needs to do more than simply change motor speed.

In a typical installation, the drive can form part of a larger automation system, exchanging commands, speed references, operating information, fault information, diagnostic data, and other process information with the control system.

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3. Main Technical Specifications

The following table summarizes the principal specifications of the 20G11BC1K5JN0NNNNN.

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4. Electrical Characteristics

The most important electrical characteristic of this model is its 1,480 A nominal output current.

This is a very large current rating and places the drive in the high-power industrial category.

The drive is designed for a 380–480 VAC class power supply, with 400 VAC being the nominal rating.

The three-phase input architecture is suitable for industrial distribution systems and large motor installations.

The drive’s normal-duty rating is approximately 850 kW, while its heavy-duty rating is approximately 710 kW.

The difference between these ratings is important when selecting the drive for a real application.

For relatively stable loads such as certain centrifugal pumps and fans, the Normal Duty rating may be the more appropriate sizing reference.

For applications involving greater starting torque, heavier acceleration, higher overload requirements, or more demanding load cycles, the Heavy Duty rating should be considered.

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5. Normal Duty and Heavy Duty Explained

The 850 kW ND rating should not simply be interpreted as “the drive can always run any 850 kW motor under any operating condition.”

Drive sizing should consider:

• Motor rated current
• Motor voltage
• Motor power
• Starting torque
• Acceleration time
• Deceleration time
• Load inertia
• Overload requirements
• Operating speed range
• Ambient temperature
• Altitude
• Cooling conditions
• Continuous versus intermittent operation

For a heavy industrial application, motor current is often more useful than motor horsepower alone when determining whether a drive is properly sized.

For this model, the approximately 1,480 A output-current capability is therefore one of the most important selection parameters.

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6. Mechanical Specifications

The 20G11BC1K5JN0NNNNN is a large-frame industrial drive.

It is not comparable in physical size to a small wall-mounted VFD used for a few-kilowatt motor.

Its configuration is based on a 600 mm deep MCC-style construction.

Important Note About Dimensions and Weight

For this particular high-power model, it is not advisable to use a generic Internet-listed dimension or weight as an installation specification.

The 600 mm depth is clearly associated with the MCC-style configuration, but the overall assembly dimensions and actual shipping weight can vary depending on the complete packaged arrangement.

This is particularly important for a Frame 9 drive because the installed system can involve power connections, cooling arrangements, cabinet sections, and other associated equipment.

Therefore, for purchasing, transportation, cabinet design, or replacement work, the exact mechanical drawing and equipment nameplate should be treated as the final reference.

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7. Product Introduction

The 20G11BC1K5JN0NNNNN is intended for large industrial motor-control systems where a conventional fixed-speed starter is not sufficient.

Instead of operating the motor continuously at a fixed line frequency, the drive regulates the motor’s electrical supply to control its operating speed and torque.

This makes it possible to match motor operation more closely to the actual process requirement.

For example, a large pump does not necessarily need to run at full speed continuously.

A drive can reduce the pump speed when the process demand decreases and increase the speed when additional flow is required.

The same basic principle can be applied to fans, blowers, conveyors, and many other rotating machines.

At this power level, however, the drive is not simply an energy-saving device.

It is also an important part of the machine’s overall control system.

It can provide controlled acceleration, controlled deceleration, speed regulation, motor protection functions, process control functions, communication, diagnostics, and integration with a higher-level automation system.

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8. Major Product Features

8.1 High Output Current

The model provides a nominal output current of approximately 1,480 A.

This makes it suitable for very large industrial motors.

For a high-power installation, current capacity is one of the first parameters that should be checked because the motor’s actual rated current must remain within the appropriate drive rating.

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8.2 850 kW Normal Duty Capacity

The approximately 850 kW Normal Duty rating allows the drive to serve large industrial motors.

This makes it suitable for applications where motor power is measured in hundreds of kilowatts rather than tens of kilowatts.

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8.3 710 kW Heavy Duty Capacity

The approximately 710 kW Heavy Duty rating provides a different operating point for applications with greater load demands.

When the motor has higher starting torque or the application frequently experiences overload conditions, the Heavy Duty rating should be considered during system design.

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8.4 Embedded EtherNet/IP

The integrated EtherNet/IP communication capability is one of the practical advantages of the PowerFlex 755 platform.

The drive can exchange information with an industrial control system, allowing operators and controllers to access information such as:

• Run command
• Stop command
• Speed reference
• Actual speed
• Output frequency
• Motor current
• Drive status
• Fault status
• Warning status
• Diagnostic information
• Parameter information

This makes the drive much easier to integrate into a modern plant automation architecture.

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9. Motor-Control Applications

The drive can support a variety of industrial motor-control strategies.

Depending on the motor and system configuration, applications can involve:

• V/Hz control
• Sensorless vector control
• Vector control
• Encoder-based control
• PID process control
• Speed regulation
• Torque-related control
• Position-related applications when the required feedback and control options are configured

The specific control method should be selected according to the motor characteristics and mechanical load.

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10. Product Applications

10.1 Large Pump Systems

Large pumps are one of the most natural applications for a high-power AC drive.

Typical examples include:

• Water supply
• Cooling-water systems
• Process-water systems
• Industrial circulation systems
• Wastewater systems
• Large irrigation systems
• Chemical process pumps

Variable-speed control can allow the pump to respond to process demand.

Instead of using a fixed-speed motor and controlling flow primarily through throttling, the motor speed can be adjusted directly.

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10.2 Large Fans

Large fans and blowers often have significant motor power requirements.

The drive can regulate fan speed according to airflow requirements.

This can be particularly useful in:

• Industrial ventilation
• Furnace systems
• Cooling systems
• Exhaust systems
• Process ventilation
• Combustion-air systems

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10.3 Conveyors

Large conveyors can require very high motor power, particularly in mining and bulk-material applications.

A variable-speed drive can provide controlled acceleration instead of applying full motor torque immediately.

This can help reduce mechanical shock to:

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

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10.4 Mining Equipment

Mining applications often involve high-power motors and demanding mechanical conditions.

Potential applications include:

• Mining conveyors
• Large fans
• Pumps
• Crushers
• Material-handling equipment
• Processing machinery

The drive’s high-current capability makes this product family suitable for many large mining motor applications.

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10.5 Metals Processing

Metals-related equipment can require accurate speed control and substantial motor power.

Applications can include:

• Material handling
• Large processing lines
• Fans
• Pumps
• Roll-related equipment
• Auxiliary machinery

The exact drive configuration should be selected according to the mechanical characteristics of the equipment.

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10.6 Cement and Heavy Material Processing

Large material-processing equipment often requires motors operating continuously at high power.

The drive can provide controlled speed and acceleration while also communicating operating information to the plant control system.

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10.7 Oil, Gas, and Process Industries

High-power motors are common in process plants.

Possible applications include:

• Large pumps
• Fans
• Compressors’ auxiliary systems
• Cooling systems
• Material-handling systems
• Process machinery

The exact suitability depends on the motor, process, hazardous-area requirements, and system architecture.

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11. Product Advantages

11.1 Excellent High-Power Capability

The biggest advantage of the model is its ability to control very large motors.

A nominal current rating of 1,480 A puts this model into a class where ordinary compact drives are no longer suitable.

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11.2 Flexible Industrial Automation Integration

Embedded EtherNet/IP provides a straightforward method for integrating the drive into an industrial network.

This can reduce the need for additional communication hardware in suitable installations.

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11.3 Good Fit for Large Continuous-Process Equipment

The PowerFlex 755 architecture is particularly useful for equipment that operates for long periods and where process speed needs to be adjusted according to production demand.

Examples include pumps, fans, blowers, and conveyors.

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11.4 High-Level Drive Architecture

The PowerFlex 755 family is not limited to basic frequency conversion.

It provides a broader platform for:

• Motor control
• Diagnostics
• Networking
• Safety functions
• Feedback
• Process control
• Advanced automation

This gives system designers greater flexibility.

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11.5 Multiple Control and Hardware Options

The broader series supports a wide selection of control and hardware configurations.

This makes it possible to build systems for different types of motors and mechanical loads while maintaining a common drive family.

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11.6 Useful Diagnostic Capabilities

Large industrial motor systems can be expensive to stop.

Drive diagnostics can help maintenance personnel identify problems related to:

• Overcurrent
• Overvoltage
• Undervoltage
• Overtemperature
• Communication
• Motor operation
• Drive hardware
• Control conditions

Better diagnostic visibility can shorten troubleshooting time.

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11.7 Suitable for Centralized Control

The drive can be integrated into a larger PLC, HMI, SCADA, or process-control environment.

This makes it possible to monitor multiple large motors from a centralized control station.

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12. Five Recommended Models from the Same Series or Closely Related Range

The following models are useful comparison candidates when selecting a PowerFlex 755 drive.

Comparison With the Target Model

For an application that is already designed around approximately 1,480 A, the 20G11BC1K4JN0NNNNN is a particularly close electrical comparison.

For applications requiring additional power/current margin, the 20G11BC1K6JN0NNNNN is worth considering.

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13. Five Popular Models From the Same Brand

For a broader selection, the following models represent useful alternatives from the same brand and related industrial drive families.

The PowerFlex 755 models are the closest choices when the objective is to maintain a high-power architecture.

The PowerFlex 753 family is more appropriate when the application has lower power requirements and does not need all of the high-power capabilities associated with a Frame 9 PowerFlex 755 installation.

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14. Target Model vs. Smaller PowerFlex 755 Drives

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15. Why This Model Is Suitable for Large Motors

A high-power motor installation has very different requirements from a small machine.

For example, when a 500 kW or 800 kW motor starts across the line, the starting current can be several times the motor’s rated current.

A properly selected variable frequency drive can provide a much more controlled starting process.

This can reduce mechanical stress and allow the process to reach operating speed in a controlled manner.

For large conveyor systems, this can be particularly useful because sudden acceleration can place considerable stress on belts, gearboxes, couplings, and shafts.

For pump systems, speed control can improve process regulation.

For fans and blowers, speed control can help match airflow to actual demand.

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16. Energy-Management Advantages

Energy savings should not be considered guaranteed simply because a variable frequency drive is installed.

The potential benefit depends heavily on the type of load.

For centrifugal pumps and fans, power consumption can decrease significantly as speed is reduced.

This is because these applications commonly exhibit affinity-law behavior, where relatively small reductions in speed can result in substantial reductions in required mechanical power.

This is one reason high-power variable-speed drives are often attractive for:

• Cooling-water pumps
• HVAC pumps
• Process pumps
• Large fans
• Cooling towers
• Industrial blowers

In contrast, constant-torque applications such as some conveyors may not exhibit the same energy-saving relationship.

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17. Communication and Automation Benefits

The integrated networking capability allows the drive to participate in a larger automation architecture.

A typical control system can use the drive for:

Command control

Start, stop, reset, enable, direction, and other operating commands.

Speed control

A PLC or process controller can provide a speed reference.

Status monitoring

The control system can monitor whether the drive is running, stopped, faulted, or ready.

Diagnostic monitoring

Drive fault and warning information can be transferred to the control system.

Process control

PID functions can be used for suitable applications such as pressure, flow, or other process variables.

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18. Important Installation Considerations

Electrical System

The high current of this drive requires appropriately sized:

• Incoming cables
• Busbars
• Protective devices
• Disconnect equipment
• Grounding conductors
• Transformer capacity
• Short-circuit protection

The upstream electrical system must be designed for the drive’s actual operating conditions.

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Cooling

A high-power air-cooled drive generates substantial heat.

The cabinet must have sufficient ventilation and appropriate airflow.

The ambient temperature should remain within the applicable operating range.

Dust, oil mist, moisture, and other contaminants should also be considered when determining the installation environment.

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Motor Cable

Motor cables should be selected according to:

• Motor current
• Cable length
• Insulation requirements
• EMC considerations
• Installation method
• Temperature
• Harmonic characteristics

The motor itself must also be suitable for variable-frequency-drive operation.

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19. Advantages of the PowerFlex 755 Series

The broader PowerFlex 755 platform provides a combination of high performance and application flexibility.

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20. Model Selection Recommendations

If the motor is around the 850 kW Normal Duty / 710 kW Heavy Duty range and the current requirement is around 1,480 A, the 20G11BC1K5JN0NNNNN is the most direct choice among the models discussed here.

If the actual motor current is lower, selecting a smaller drive can reduce equipment size and potentially reduce system cost.

If the motor requires more current or additional power margin, a larger Frame 10 configuration should be considered.

For applications where braking energy must be dissipated rapidly, the absence of a dynamic braking transistor in this specific configuration is an important point.

If the application has a large rotating inertia and frequent rapid deceleration, the braking strategy should be evaluated before selecting this exact model.

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21. Key Parameters at a Glance

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22. Overall Product Evaluation

The 20G11BC1K5JN0NNNNN is best understood as a large industrial motor-control platform rather than a conventional compact inverter.

Its combination of 1,480 A output current, 850 kW Normal Duty power, 710 kW Heavy Duty power, 400 V class input, Frame 9 construction, 600 mm MCC-style depth, IP20 protection, and embedded EtherNet/IP makes it particularly suitable for large-scale industrial installations.

Its strongest advantage is the ability to combine substantial motor power with advanced control and industrial communication functions.

For pump and fan applications, the drive can provide process-speed regulation and potentially significant energy benefits when the load characteristics are suitable.

For conveyors and heavy machinery, controlled acceleration and deceleration can be more important than energy savings.

For mining, metals, material handling, and process industries, the high-current architecture provides the capacity needed for large motors while maintaining integration with a broader automation system.

From a replacement and purchasing perspective, the most closely related models are the other PowerFlex 755 Frame 9 high-current configurations, particularly the 20G11BC1K4JN0NNNNN, 20G11BC1K1JN0NNNNN, and 20G11BC1K0JN0NNNNN, while the 20G11BC1K6JN0NNNNN is more suitable when additional current and power capacity are required.

The most important points to verify before ordering or replacing this drive are the motor rated current, motor voltage, duty classification, load type, overload requirement, braking requirement, communication architecture, enclosure arrangement, physical dimensions, and exact weight (kg).

For mechanical planning, the 600 mm depth is a useful reference for this configuration, but the complete height, width, net weight, and shipping weight should be confirmed against the exact equipment configuration rather than estimated from the catalog number.