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20G11JD1K0JN0NNNNN — PowerFlex 755 High-Power AC Drive

1. Product Overview

The 20G11JD1K0JN0NNNNN is a high-power industrial AC variable frequency drive designed for large three-phase motor applications. It belongs to the PowerFlex 755 series within the PowerFlex 750 Series family.

This model is positioned in the very-high-power range and is intended for large pumps, fans, blowers, compressors, conveyors, process machinery, and other industrial equipment requiring controlled motor speed, acceleration, deceleration, and torque.

The drive is configured for a 480 VAC, three-phase power system and uses a large Frame 9 air-cooled cabinet arrangement. Its principal current rating is approximately 1,135 A for Light Duty, 1,045 A for Normal Duty, and 800 A for Heavy Duty.

In terms of motor power, the corresponding ratings are approximately 1,000 HP Light Duty, 900 HP Normal Duty, and 750 HP Heavy Duty.

The JN0 configuration is important because it identifies a particular packaged-drive arrangement with AC input with precharge and DC terminals, an installed common-mode/filter configuration, and no internal dynamic-braking transistor. The configuration also uses a blank/no HIM arrangement, making it suitable for installations where the drive is primarily controlled and monitored through the plant automation system.

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2. Brand and Product Series

The PowerFlex 755 series is designed for applications where the drive needs to do more than basic speed regulation.

It is particularly useful in large industrial installations where motor control, process control, diagnostics, communication, and equipment protection are all part of the overall system.

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3. Main Technical Parameters

Important: the dimensions and weight above are practical reference values for the packaged cabinet configuration. The exact mechanical drawing for the individual build should be used for final transportation, lifting, foundation, floor-loading, and installation calculations.

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4. Understanding the Model Number

The catalog number 20G11JD1K0JN0NNNNN contains configuration information that distinguishes this drive from other PowerFlex 755 models.

The 20G portion identifies the PowerFlex 755 product architecture.

The JD portion places the product within the 480 VAC high-power packaged-drive group.

The 1K0 portion corresponds to the approximately 1,000 HP-class drive rating.

The J configuration identifies the relevant filtering/common-mode jumper arrangement.

The N configuration in the braking position indicates that an internal dynamic-braking transistor is not included.

The 0 and remaining configuration characters identify additional factory configuration selections.

The complete catalog number is therefore important when purchasing, replacing, or comparing this equipment.

A drive with the same current rating but a different catalog-number suffix may have a different input arrangement, braking arrangement, filtering configuration, HIM configuration, enclosure arrangement, or other option.

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5. Product Introduction

The 20G11JD1K0JN0NNNNN is essentially a large industrial motor-control system.

Its basic job is to convert incoming fixed-frequency AC power into controlled electrical power for an AC motor.

By controlling output frequency and voltage, the drive can control motor speed.

This makes it possible to operate large rotating equipment at a speed appropriate to the process rather than simply running the motor at its rated speed continuously.

This characteristic is particularly valuable in applications where process demand changes throughout the day.

A large pump may not require maximum flow all the time.

A large fan may not need maximum airflow during every operating condition.

A conveyor may require gradual acceleration to prevent mechanical shock.

A compressor may need to adjust its operating speed according to process demand.

A process mixer may require different speeds at different stages of production.

In these applications, variable-speed control provides much greater flexibility than simple motor starting and stopping.

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6. Electrical Capacity

The 20G11JD1K0JN0NNNNN is one of the larger PowerFlex 755 configurations.

Its principal ratings are:

These three ratings should not be treated as interchangeable.

The correct rating depends on the actual load characteristics.

For example, a centrifugal fan may operate under a relatively predictable variable-torque load.

A large conveyor may require much greater torque during acceleration.

A mixer may have significant load variation.

A high-inertia machine may require substantial current during acceleration and may return significant energy to the DC bus during deceleration.

For that reason, motor current and duty classification are normally more useful selection criteria than horsepower alone.

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7. Light Duty Rating

The approximately 1135 A / 1000 HP Light Duty rating is useful for applications with relatively moderate overload requirements.

Typical examples include:

• Large centrifugal fans
• Large centrifugal pumps
• Cooling systems
• Large ventilation equipment
• Certain continuous-process machines

Light Duty applications generally have less severe overload requirements than heavy constant-torque applications.

The actual machine operating profile should always be reviewed before using the Light Duty rating.

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8. Normal Duty Rating

The approximately 1045 A / 900 HP Normal Duty rating is one of the most important ratings for this model.

This is a useful reference point for applications involving large motors that operate continuously under normal industrial loading.

Examples can include:

• Large pumps
• Large fans
• Compressors
• Process machinery
• Large material-handling systems

A motor with a nominal rating near 900 HP should not automatically be paired with this drive.

The motor’s actual rated current must be checked.

The operating environment, duty cycle, acceleration requirement, ambient temperature, and overload requirement should also be considered.

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9. Heavy Duty Rating

The approximately 800 A / 750 HP Heavy Duty rating is more appropriate when the application places greater demands on the drive.

Heavy Duty considerations become important for:

• Heavy conveyors
• High-inertia machines
• Constant-torque loads
• Machines with frequent acceleration
• Machines with repeated overload conditions
• Certain mixers
• Material-processing equipment

A common mistake in high-power drive selection is to compare only the motor horsepower.

For a demanding machine, the Heavy Duty current rating may determine the correct drive size.

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10. Input Configuration

The model uses an AC input with precharge and DC terminals.

The precharge arrangement is important in a large drive because the DC bus contains substantial energy-storage components.

During startup, the precharge circuit controls the initial charging process and limits the initial charging current.

The availability of DC terminals also makes the configuration more flexible for certain system architectures where access to the DC bus is required.

This is one of the distinctions between different PowerFlex 755 catalog-number configurations.

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11. Dynamic Braking Configuration

The 20G11JD1K0JN0NNNNN does not include an internal dynamic-braking transistor.

This is an important point when selecting the model for high-inertia equipment.

During motor deceleration, the motor can act as a generator.

Energy can then flow back into the drive’s DC bus.

If the application requires very rapid deceleration, this regenerated energy needs to be managed.

Possible system approaches depend on the application and may involve external braking equipment or another regenerative-energy solution.

Particular attention should be paid to:

• Centrifuges
• Large fans with substantial inertia
• Large rotating drums
• Heavy conveyors
• Hoisting systems
• High-speed rotating equipment
• Machines requiring rapid stopping

For applications with long, controlled deceleration times, the regenerative-energy requirement may be much less severe.

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12. Filtering and Common-Mode Configuration

The catalog number identifies a filtered configuration with the common-mode jumper installed.

Filtering is relevant to the electrical behavior of a variable-frequency drive because the output waveform is generated using high-speed switching.

The switching process can create electrical noise and common-mode effects.

A suitable filtering arrangement can help the drive fit into the overall electrical environment.

The actual installation should still follow the appropriate grounding, motor-cable, shielding, and EMC practices.

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13. HIM Configuration

The model is specified with a Blank / No HIM configuration.

HIM means Human Interface Module.

A drive with a local HIM allows technicians to interact directly with the drive from the cabinet.

A blank-HIM configuration, by comparison, is often useful where the drive is expected to be controlled through a centralized automation system.

This configuration can be advantageous when the plant has a dedicated control room, PLC system, supervisory system, or industrial network.

However, maintenance teams should consider whether local access is required during commissioning and troubleshooting.

If local operation is important, an appropriate compatible interface can be included as part of the overall system design.

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14. Mechanical Construction

The drive uses a large Frame 9 MCC-style cabinet.

The approximate mechanical parameters are:

The approximately 1287 kg weight is one of the most important practical characteristics.

This is not equipment that should be handled with ordinary pallet-moving equipment without first confirming the required load capacity.

Transportation and installation planning should include suitable lifting and handling equipment.

The equipment room should also have sufficient access for delivery and future maintenance.

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15. Cooling System

The drive is air cooled using forced airflow.

At approximately 1,000 HP class, the power electronics generate considerable heat.

The cooling system therefore plays a major role in maintaining reliable operation.

The installation should provide adequate:

• Air intake
• Hot-air exhaust
• Room ventilation
• HVAC capacity
• Cabinet clearance
• Temperature control
• Dust management

The air path should not be obstructed.

Hot exhaust air should not be allowed to circulate continuously back into the drive’s air intake.

For a large installation, the heat generated by the drive should be included in the electrical-room HVAC calculation.

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16. Enclosure Protection

The packaged cabinet is approximately IP54 / NEMA Type 12.

This makes the product suitable for many industrial electrical environments.

The enclosure provides protection against dust and certain forms of incidental water exposure.

It is not intended to be treated as a waterproof enclosure.

The installation should therefore avoid direct exposure to:

• High-pressure water
• Outdoor weather without appropriate protection
• Excessive condensation
• Corrosive chemicals
• Extreme dust concentrations
• Temperatures beyond the equipment’s operating range

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17. Product Applications

17.1 Large Pumping Systems

The drive is particularly well suited to large pumps.

A pump can operate at different speeds according to:

• Flow demand
• Pressure
• Tank level
• Process requirements
• Cooling requirements

This can provide more precise process control.

For variable-torque pumping systems, reducing motor speed can also substantially reduce power consumption compared with continuously running at full speed and restricting flow through mechanical methods.

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17.2 Large Fans

Large fans can require hundreds of horsepower.

When airflow demand changes, continuously running the motor at maximum speed may be unnecessary.

Variable-speed control allows the fan to follow process demand.

Typical applications include:

• Industrial ventilation
• Furnace exhaust
• Mining ventilation
• Dust collection
• Cement processing
• Steel processing
• Chemical plants
• Large HVAC systems

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17.3 Large Blowers

Blowers used in industrial processes can also benefit from variable-speed operation.

The drive can regulate motor speed according to the required airflow or process pressure.

This can make the overall process more flexible.

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17.4 Compressors

Large compressors often require substantial motor power.

The drive can provide controlled acceleration and variable-speed operation when the compressor and motor are suitable for VFD operation.

Potential applications include:

• Industrial compressed air
• Process gas
• Chemical processing
• Manufacturing
• Energy facilities

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17.5 Conveyors

Large conveyors can require very high motor torque.

The drive can provide controlled acceleration rather than applying full starting torque immediately.

This can reduce mechanical stress on:

• Belts
• Gearboxes
• Couplings
• Shafts
• Bearings
• Conveyor structures

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17.6 Process Machinery

The drive can also be applied to large:

• Mixers
• Agitators
• Processing machines
• Extrusion systems
• Material-handling machines
• Rotating process equipment
• Production machinery

The final selection should always be based on actual motor current and load characteristics.

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18. Product Advantages

18.1 Very High Power Rating

The approximately 1000 HP Light Duty rating makes this model suitable for very large industrial motors.

It occupies a range where many conventional compact drives would not be capable of handling the required current.

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18.2 High Current Capacity

The approximately 1045 A Normal Duty rating provides substantial continuous output capability.

This makes it appropriate for large industrial motors where current requirements are too high for smaller drive frames.

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18.3 Flexible Speed Control

The drive allows motor speed to be adjusted according to process requirements.

This is particularly useful for pumps, fans, blowers, and compressors.

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18.4 Controlled Acceleration

Large motors can place substantial mechanical stress on connected equipment during starting.

Variable-frequency acceleration can provide a smoother transition from zero speed to operating speed.

This can be valuable for large conveyors, fans, pumps, and process machines.

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18.5 Large Industrial Enclosure

The NEMA Type 12 / IP54 cabinet provides a substantial industrial package.

It is more appropriate for many industrial electrical rooms than an exposed open-frame drive.

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18.6 Centralized Automation

The PowerFlex 755 architecture is designed for integration with industrial automation.

This allows the drive to participate in a broader control system.

Typical information exchanged with a control system can include:

• Speed command
• Speed feedback
• Output current
• Drive status
• Fault status
• Warning status
• Operating conditions
• Diagnostic information

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18.7 Service and Diagnostics

Although this particular configuration uses a blank/no-HIM arrangement, the PowerFlex 755 platform provides extensive parameter and diagnostic functionality.

In a centralized automation system, this can allow maintenance personnel to diagnose operating problems without relying exclusively on physical inspection.

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19. Five Related PowerFlex 755 Models

The following models are useful alternatives or comparison points within the same high-power series.

The 20G11JD800JN0NNNNN is a logical choice when the motor is smaller and the target drive would be unnecessarily oversized.

The 20G11JD960JN0NNNNN sits immediately below the target capacity and can be considered when the motor current is below the target model’s requirement.

The 20G11JD1K2JN0NNNNN and 20G11JD1K3JN0NNNNN are more suitable when the motor requires greater current or when the application needs additional capacity.

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20. Comparison of the Related Models

The important point is that these models are not selected merely according to horsepower.

The actual motor nameplate current, duty classification, overload requirements, acceleration time, and environmental conditions should determine the final drive selection.

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21. Five Related Models with Different Voltage or Power Classes

For projects that are not restricted to exactly the same 480 VAC configuration, the following models can also be considered within the wider PowerFlex 755 product range.

These are related rather than direct drop-in replacements.

A 400 V, 480 V, 600 V, or 690 V drive must be matched to the motor and plant electrical system.

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22. Five Popular Models from the Same Brand

For a replacement project, the target model should generally be compared first with models in the same voltage, frame, current, enclosure, braking, filtering, and input configuration.

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23. Application Suitability

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24. Installation Requirements

The physical size of the equipment makes installation planning particularly important.

The approximate cabinet size is 2477 mm high × 1200 mm wide × 800 mm deep.

The approximate weight is 1287 kg.

The installation location should therefore be checked for:

• Floor loading
• Door height
• Door width
• Transportation path
• Lifting access
• Cabinet clearance
• Maintenance access
• Cable entry
• Ventilation
• HVAC capacity
• Emergency access

The cabinet should be installed on a suitable industrial floor capable of supporting the equipment.

The final lifting method should be based on the actual equipment weight and center of gravity.

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25. Electrical Installation Considerations

Because the drive operates at approximately 1,000 HP class, the electrical installation is substantial.

Important considerations include:

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26. Maintenance Advantages

The PowerFlex 755 architecture is designed for industrial service.

For a large motor installation, the drive can provide operating information that helps maintenance personnel identify problems before they become major failures.

Useful monitoring information can include:

• Motor current
• Motor speed
• Drive status
• Fault conditions
• Warning conditions
• Operating parameters
• Temperature-related conditions
• Communication status

The blank-HIM configuration means that the final system should be planned with appropriate access for commissioning and maintenance.

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27. Energy and Process Benefits

Variable-speed operation can provide significant benefits in applications where motor load changes continuously.

The clearest examples are pumps and fans.

For a centrifugal pump or fan, reducing speed can substantially reduce the power required by the motor.

Instead of using a fixed-speed motor and wasting excess capacity through throttling or mechanical restriction, the motor can operate closer to the actual process requirement.

This can improve process flexibility and, depending on the system, reduce energy consumption.

The actual energy-saving potential depends on the load curve, operating hours, process requirements, motor efficiency, system resistance, and control strategy.

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28. Why Choose the 20G11JD1K0JN0NNNNN?

The model is particularly attractive when the project has the following characteristics:

• 480 VAC three-phase power
• Very large AC motor
• Motor current around the 1,000 A class
• Large pump or fan
• Large conveyor
• Large compressor
• High-power process machine
• Need for variable-speed operation
• Need for industrial cabinet protection
• Need for integration into a plant automation system
• Need for a floor-standing MCC-style drive
• Need for access to DC terminals

If these conditions apply, the 20G11JD1K0JN0NNNNN is a strong candidate within the PowerFlex 755 range.

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29. Important Difference from 20G11JD1K0AN0NNNNN

The 20G11JD1K0JN0NNNNN and 20G11JD1K0AN0NNNNN are very closely related catalog numbers.

The most important configuration distinction is associated with the input arrangement.

This difference can be critical in a replacement project.

A replacement should therefore match the required DC-terminal arrangement and the overall electrical architecture rather than simply matching horsepower.

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30. Complete Specification Summary

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31. Overall Product Evaluation

The 20G11JD1K0JN0NNNNN is a high-capacity industrial AC drive designed for very large 480 V three-phase motor applications.

Its combination of approximately 1135 A Light Duty, 1045 A Normal Duty, and 800 A Heavy Duty current capacity makes it suitable for motors and machines operating in the very-high-power range.

The approximately 1000 HP Light Duty, 900 HP Normal Duty, and 750 HP Heavy Duty ratings provide useful flexibility across different types of industrial loads.

The Frame 9, air-cooled, IP54 / NEMA Type 12, 800 mm deep MCC-style cabinet makes it suitable for large industrial electrical rooms and motor-control installations.

The approximate 2477 × 1200 × 800 mm dimensions and 1287 kg weight should be considered carefully during equipment-room design, transportation, lifting, installation, and future maintenance.

One of the most important characteristics of this exact configuration is its AC input with precharge and DC terminals.

Another important point is the absence of an internal dynamic-braking transistor.

The drive is therefore particularly attractive for large motors where variable-speed control and industrial automation integration are more important than compact physical size.

For large centrifugal pumps, cooling systems, fans, blowers, compressors, conveyors, and process machinery, it provides a strong high-power motor-control platform.

For applications with high inertia or rapid stopping requirements, the braking and regenerative-energy arrangement should be reviewed separately.

For applications with heavy starting torque or frequent overloads, the 800 A Heavy Duty rating should be used as the key selection reference rather than the 1000 HP Light Duty rating.

For replacement projects, the complete catalog number should be matched carefully because seemingly small differences in the catalog number can represent meaningful differences in input configuration, filtering, braking, HIM, or other options.

Overall, the 20G11JD1K0JN0NNNNN can be regarded as a large, high-current, floor-standing industrial AC variable-frequency drive for approximately 1,000 HP-class 480 V motor applications, with particular strengths in large-scale process control, variable-speed operation, controlled motor starting, industrial enclosure protection, and integration into sophisticated automation systems.