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20G11BC1K5JN2NNNNN — High-Power PowerFlex 755 AC Drive Product Guide

1. Product Overview

The 20G11BC1K5JN2NNNNN is a high-power, air-cooled AC variable frequency drive in the PowerFlex 755 series.

It is designed for large three-phase industrial motors where high current capacity, stable speed regulation, controlled acceleration and deceleration, industrial communication, and flexible motor-control functions are required.

This particular configuration is rated for 400 VAC, three-phase input, with a nominal output current of 1,480 A. Its principal power ratings are approximately 900 kW Light Duty (LD), 850 kW Normal Duty (ND), and 710 kW Heavy Duty (HD).

The unit uses a Frame 9, IP20 / Type 1, 600 mm deep MCC-style construction and forced-air cooling. It includes embedded EtherNet/IP communication and a handheld/local HIM configuration, making it suitable for both centralized automation and local commissioning or maintenance.

The model is intended for large industrial installations rather than small machine-level applications. Typical applications include large pumps, fans, blowers, conveyors, material-handling systems, mining equipment, process machinery, and other high-power rotating equipment.

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2. Brand and Product Series

The PowerFlex 755 series is an architecture-class AC drive family intended for demanding industrial motor-control applications.

Compared with a small general-purpose inverter, the PowerFlex 755 platform provides a much broader range of control, feedback, communication, safety, diagnostic, and application options.

For a large industrial motor, the drive can become an important part of the overall automation system rather than simply acting as a frequency converter.

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3. Main Technical Parameters

The 1,270 kg figure should be treated as an approximate equipment weight rather than a universal shipping weight. Packaging, cabinet accessories, transportation hardware, and project-specific assemblies can change the actual shipping mass.

For cabinet engineering and transportation planning, the physical assembly should therefore be checked against the actual unit being supplied.

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4. Electrical Rating

The most important electrical characteristic of the 20G11BC1K5JN2NNNNN is its 1,480 A output-current rating.

This is an extremely high current level compared with conventional industrial VFDs.

The model is designed around a 400 VAC, three-phase supply and has three principal power ratings:

These ratings give the drive considerable flexibility.

For applications such as centrifugal pumps and fans, the Normal Duty or Light Duty rating may be appropriate depending on the actual motor and load characteristics.

For conveyors, crushers, heavy machinery, or other applications with substantial torque demand, the Heavy Duty rating should receive particular attention.

Motor current, rather than motor power alone, should always be checked before final drive selection.

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5. Input Configuration

The 20G11BC1K5JN2NNNNN uses an AC input with precharge configuration.

Precharge is important in a large drive because the DC-link capacitors cannot simply be connected directly to the incoming AC supply without controlling the initial charging current.

The precharge arrangement limits the initial charging current and helps protect the DC-link components and incoming power system.

The drive also has DC terminals, which is significant for applications where the DC bus needs to interface with other compatible equipment or a particular system architecture.

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6. Output Current and Motor Selection

The 1,480 A output rating is the central sizing parameter for this model.

When selecting a motor for this drive, the following should be considered:

• Motor rated voltage
• Motor rated current
• Motor power
• Motor frequency
• Motor speed
• Motor starting torque
• Continuous torque requirements
• Peak torque requirements
• Overload profile
• Acceleration time
• Deceleration time
• Motor insulation
• Motor cable length
• Ambient temperature
• Installation altitude
• Cooling conditions

A motor with a nominal rating of 850 kW does not automatically mean that every 850 kW motor is an appropriate match.

Two motors with identical power ratings can have significantly different rated currents, torque characteristics, speed ranges, and overload requirements.

For that reason, the actual motor nameplate current is a particularly important value during drive selection.

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7. Product Introduction

The 20G11BC1K5JN2NNNNN is intended for applications where a large AC motor needs controlled variable-speed operation.

Instead of connecting the motor directly to the fixed-frequency electrical supply, the drive generates a controlled output waveform that allows the motor’s operating frequency and voltage to be regulated.

This allows the motor to accelerate in a controlled manner, operate at different speeds, and decelerate according to the process requirements.

For large industrial machinery, this type of control can have significant mechanical and operational benefits.

A large conveyor, for example, can be accelerated gradually instead of immediately applying full motor speed.

A large pump can operate at a speed corresponding to actual process demand.

A large fan can reduce speed when the required airflow is lower.

A processing machine can maintain a controlled production speed rather than being limited to one fixed motor speed.

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8. Local Handheld / Local HIM

One of the distinguishing features of this particular configuration is the Handheld / Local HIM arrangement.

HIM stands for Human Interface Module.

The local interface allows technicians and operators to interact with the drive without relying entirely on a remote PLC or supervisory system.

Depending on the application and configuration, a local HIM can be useful for:

• Drive commissioning
• Parameter configuration
• Local status checking
• Fault diagnosis
• Alarm monitoring
• Speed reference adjustment
• Start/stop functions where permitted
• Maintenance
• Troubleshooting

This can be particularly useful on a large industrial drive because technicians may need access to operating information directly at the equipment.

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9. Embedded EtherNet/IP Communication

The embedded EtherNet/IP interface provides an important connection between the drive and the industrial automation system.

A PLC or control system can exchange information with the drive, including:

• Run commands
• Stop commands
• Speed references
• Actual speed
• Output frequency
• Output current
• Drive status
• Fault status
• Warning information
• Diagnostic information
• Process-related data

This allows the drive to become an active component of the control architecture.

In a large plant, several high-power drives can be monitored from a centralized control system while local technicians can still use the HIM when maintenance is required.

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10. Product Applications

10.1 Large Water Pumps

The drive is particularly well suited to high-power pump systems.

Possible applications include:

• Water treatment
• Industrial water circulation
• Cooling-water systems
• Process-water systems
• Large irrigation systems
• Wastewater systems
• Utility pumping

The variable-speed capability can allow pump output to be adjusted to actual system requirements.

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10.2 Large Process Pumps

Chemical, petrochemical, manufacturing, and other process facilities frequently use large pumps.

The drive can regulate pump speed according to pressure, flow, or other process requirements.

When combined with suitable PID control, the motor speed can be automatically adjusted to maintain a process variable within a desired operating range.

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10.3 Large Fans and Blowers

High-power fans can consume substantial amounts of electricity.

Applications may include:

• Industrial ventilation
• Furnace air systems
• Combustion air
• Exhaust systems
• Cooling systems
• Process ventilation
• Large-scale air handling

Variable-speed operation can provide more accurate airflow control than a fixed-speed motor arrangement.

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10.4 Mining Conveyors

Large conveyors are a strong application for this type of drive.

The high current rating allows the drive to operate large motors, while controlled acceleration can help reduce mechanical stress.

Potential benefits include smoother starting and reduced shock on:

• Belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Mechanical structures

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10.5 Heavy Material Handling

Bulk-material systems can require very high motor power.

Applications may include:

• Ore handling
• Coal handling
• Aggregate handling
• Bulk-material conveyors
• Transfer systems
• Large lifting-related equipment

The exact configuration depends on the mechanical system and torque profile.

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10.6 Cement and Mineral Processing

Large rotating machinery used in cement and mineral processing can require hundreds of kilowatts or more.

The drive can provide:

• Controlled starting
• Adjustable speed
• Process integration
• Fault monitoring
• Centralized control
• Motor protection

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10.7 Metals Processing

Large industrial motors are commonly used in metals-processing plants.

Potential applications include:

• Material handling
• Large fans
• Large pumps
• Process lines
• Auxiliary equipment
• High-power rotating machinery

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11. Product Advantages

11.1 Extremely High Current Capacity

The 1,480 A current rating is the primary strength of this model.

It allows the drive to serve very large industrial motors that would be beyond the range of most conventional VFD products.

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11.2 High Power Rating

The 850 kW Normal Duty and 900 kW Light Duty ratings provide substantial operating capacity.

This gives the drive a wide application range within the high-power industrial sector.

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11.3 Heavy-Duty Capability

The 710 kW Heavy Duty rating makes the drive suitable for applications that require more demanding torque and overload characteristics.

This is important for machinery that cannot be treated as a simple variable-torque load.

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11.4 Local Operator Interface

The handheld/local HIM is valuable for commissioning and maintenance.

Technicians can access drive information directly at the equipment instead of depending exclusively on the plant control system.

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11.5 Embedded Industrial Networking

Embedded EtherNet/IP simplifies integration with an industrial automation architecture.

It allows the drive to exchange control and diagnostic information with the supervisory system.

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11.6 Flexible Motor Control

The PowerFlex 755 platform supports multiple motor-control approaches and feedback arrangements.

This allows engineers to select an appropriate control strategy according to the motor and machine.

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11.7 High-Power Industrial Construction

The Frame 9 construction and 600 mm MCC-style arrangement are intended for substantial industrial installations.

This is a different design philosophy from compact machine-mounted drives.

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11.8 Good Diagnostic Capability

Large industrial motors can represent a major part of a plant’s production capacity.

When a drive trips, rapid access to fault and operating information can reduce troubleshooting time.

The drive architecture provides a range of operating and diagnostic information that can be monitored locally and through the automation network.

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12. Mechanical Parameters

The 600 mm depth is a particularly important specification when planning cabinet or MCC installation.

The overall height and width should not be confused with the depth specification. The complete physical assembly is substantially larger than a small standalone VFD.

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13. Five Recommended Models From the Same Series

The following five models are useful alternatives within the same PowerFlex 755 family.

Closest Alternatives

Among these models, the most interesting alternatives are the 20G11BC1K4JN2NNNNN and 20G11BC1K6JN2NNNNN.

The former is very close to the target current and power class.

The latter provides additional current capacity and is better suited when the application needs additional electrical margin.

The lower-current models are more appropriate when the motor is smaller and a 1,480 A drive would be unnecessarily large.

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14. Five Related Same-Brand Popular Models

The following table provides a broader selection of commonly encountered industrial drive models from the same brand.

The 20G11BC2K1JN0NNNNN is especially interesting when the application requires a substantially higher current rating.

For smaller applications, the 20G11BC910JN2NNNNN can provide a more appropriately sized solution.

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15. Detailed Comparison of Closest PowerFlex 755 Models

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16. Why Choose 20G11BC1K5JN2NNNNN?

There are several situations in which this model makes particular sense.

When the Motor Is Very Large

If the motor current approaches the 1,480 A class, smaller PowerFlex 755 models may no longer provide sufficient capacity.

When Local Maintenance Is Important

The handheld/local HIM makes it easier for maintenance personnel to interact with the drive at the installation.

When Network Integration Is Required

Embedded EtherNet/IP allows the drive to communicate with the plant automation system.

When the Application Needs Multiple Duty Ratings

The combination of Light Duty, Normal Duty, and Heavy Duty ratings allows the same basic drive platform to be evaluated against different load profiles.

When a Common Drive Platform Is Desired

Plants already using the PowerFlex 755 family may prefer to keep large drives within the same family to simplify training, programming, maintenance, and spare-parts management.

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17. Application Suitability by Load Type

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18. Important Consideration: Braking

The specified configuration does not include a dynamic braking transistor.

This is important for applications where the motor must decelerate rapidly.

During deceleration, a large rotating load can return mechanical energy to the drive.

Depending on the system, this can increase the DC-bus voltage.

If the application has substantial regenerative energy, the system designer may need to consider:

• Dynamic braking
• Regenerative equipment
• Regenerative drive architecture
• Longer deceleration time
• Mechanical braking
• Load-specific energy management

This is particularly important for high-inertia machinery.

A drive that is correctly sized for motor power is not automatically correctly configured for braking requirements.

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19. Cooling and Thermal Management

At approximately 850–900 kW of motor power, thermal management becomes a major engineering consideration.

The drive uses forced-air cooling.

Adequate airflow is essential.

The installation should consider:

• Ambient temperature
• Air quality
• Dust
• Moisture
• Ventilation
• Cabinet temperature
• Airflow direction
• Fan condition
• Filter condition where applicable
• Installation altitude
• Clearance around ventilation openings

Poor thermal management can reduce equipment life and may lead to drive trips.

For a large industrial drive, the cooling system should be treated as an important part of the overall installation rather than an incidental detail.

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20. Industrial Communication Advantages

The embedded EtherNet/IP interface is particularly useful when the drive is part of a larger control system.

For example, a central PLC can command the drive to operate at a specific speed while receiving:

• Actual speed
• Current
• Frequency
• Status
• Fault codes
• Warnings
• Operating conditions

This can make the system easier to monitor.

For a large plant, this information can also be displayed on an HMI or SCADA system, allowing operators to identify abnormal conditions before they become major production problems.

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21. Maintenance Advantages

A high-power drive represents a significant investment and often controls equipment that is critical to production.

Maintenance personnel therefore benefit from:

• Local display access
• Fault information
• Diagnostic information
• Network monitoring
• Parameter management
• Status monitoring
• Controlled commissioning

The handheld/local HIM is especially useful during commissioning and troubleshooting.

Technicians can work directly at the drive while observing operating parameters and diagnostic information.

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22. Physical Installation

The 600 mm deep MCC-style construction should be considered when designing the electrical room or motor-control center.

The installation is substantially different from mounting a compact drive on a machine panel.

The design should provide suitable space for:

• Main power connections
• Motor connections
• Control wiring
• Network connections
• Cooling airflow
• Maintenance access
• Cable routing
• Grounding
• Protective equipment
• Service access

The actual height and width should be established from the particular mechanical arrangement before manufacturing the cabinet or preparing the installation area.

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23. Weight and Transportation

The approximate equipment weight for the referenced configuration is 1,270 kg.

This is important because the drive cannot be handled like a conventional small VFD.

Transportation and installation planning may require consideration of:

• Forklift capacity
• Crane capacity
• Floor loading
• Access-door dimensions
• Elevator capacity
• Pallet dimensions
• Packaging
• Unloading location
• Cabinet positioning
• Installation lifting points

The final shipping weight can be higher than the equipment’s net weight because packaging and transportation structures add mass.

For this reason, the 1,270 kg value should be used as an approximate equipment-weight reference rather than a guaranteed shipping weight.

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24. Main Advantages Summary

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25. Recommended Model Selection

For a Similar 850 kW Application

20G11BC1K4JN2NNNNN is a logical comparison model when the current requirement is close to the target drive.

For a Smaller Motor

20G11BC1K2JN2NNNNN or 20G11BC1K1JN2NNNNN can be considered when the motor current is lower.

For a Medium-Large Motor

20G11BC1K0JN2NNNNN provides a lower current and power class.

For a Higher-Power Motor

20G11BC2K1JN0NNNNN provides a major increase in current and power capacity and moves into the Frame 10 class.

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26. Complete Product Parameter Summary

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27. Final Product Assessment

The 20G11BC1K5JN2NNNNN is a high-capacity PowerFlex 755 AC drive intended for serious industrial motor-control applications.

Its combination of 1,480 A output current, 900 kW Light Duty, 850 kW Normal Duty, and 710 kW Heavy Duty ratings gives it a very broad operating range for large industrial motors.

The 400 VAC three-phase input, Frame 9 architecture, 600 mm deep MCC-style construction, IP20 / Type 1 enclosure, and forced-air cooling make it suitable for installation in a properly engineered industrial electrical room or motor-control center.

The embedded EtherNet/IP interface is another major advantage. It allows the drive to become part of the plant automation system rather than operating as an isolated motor controller.

The Handheld / Local HIM configuration is particularly useful for commissioning, maintenance, local diagnosis, and service work.

For pumps and fans, the drive can provide accurate variable-speed control and may provide substantial energy benefits when the load follows variable-torque characteristics.

For conveyors and heavy machinery, controlled acceleration and speed regulation can help improve machine operation and reduce mechanical stress.

For mining, metals, cement, material handling, and process industries, the high current rating makes the unit suitable for very large motor systems where smaller drives would not provide sufficient capacity.

The main points that should be checked before selecting or replacing this model are motor rated current, motor voltage, duty classification, overload requirement, acceleration/deceleration profile, braking requirements, cooling conditions, cabinet space, power-system capacity, and physical installation requirements.

For mechanical planning, the key reference points are the 600 mm MCC-style depth and an approximate equipment weight of 1,270 kg. The exact overall height, width, shipping weight, and installation footprint should be confirmed against the particular physical assembly before transportation, cabinet fabrication, or final installation.