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20G11BF795JN2NNNNN — Detailed Product Information, Technical Parameters, Applications, Advantages and Related Models

The 20G11BF795JN2NNNNN is a high-power variable-frequency AC drive belonging to the PowerFlex 755 family. It is intended for large industrial motor applications where high current capacity, reliable speed control, substantial overload capability and integration with an industrial automation system are required.

This version is particularly notable for its 795 A current rating, 690 VAC class, Frame 9 construction, air-cooled design, filtered configuration and door-mounted enhanced LCD Human Interface Module.

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1. Basic Product Information

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2. Product Introduction

The 20G11BF795JN2NNNNN is a large-frame industrial AC drive designed to control high-power three-phase motors.

Its primary function is to convert fixed-frequency AC electrical power into a controlled variable-frequency output so that the connected motor can operate at an appropriate speed and torque for the process.

Instead of operating a large motor simply in an ON/OFF manner, the drive can control the motor’s operating conditions according to the requirements of the machine.

A typical system can be represented as:

690 VAC Three-Phase Power

↓

AC Input and Precharge

↓

DC Bus

↓

Power Conversion Section

↓

Variable-Frequency AC Output

↓

Large Three-Phase Motor

↓

Industrial Machine

This type of architecture is particularly useful in applications where motor speed, acceleration, deceleration and torque need to be controlled precisely.

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3. Product Series

The product belongs to the PowerFlex 755 series.

The PowerFlex 755 family is positioned for higher-performance industrial motor-control applications.

Compared with smaller general-purpose drives, the PowerFlex 755 platform provides considerably more flexibility for large machines, high-power motors and complex automation systems.

Typical applications include:

• Large conveyors.
• Mining machinery.
• Material-handling systems.
• Pumps.
• Fans.
• Blowers.
• Process machinery.
• Metals equipment.
• Oil and gas equipment.
• Refining equipment.
• Large industrial production lines.

The series is particularly useful where the drive needs to become part of a larger automated control system rather than operating as an isolated motor controller.

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4. Important Difference Between 20G11BF795JN2NNNNN and 20G11BF795JN0NNNNN

The JN2 configuration should not simply be treated as identical to the JN0 configuration.

One of the most important differences is the operator interface.

Therefore, the JN2 version is especially convenient where local operator access and direct parameter viewing are required.

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5. Main Electrical Parameters

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6. 795 A Current Capacity

The 795 A rating is one of the most important characteristics of this drive.

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

It is intended for motors that are substantially larger than those normally controlled by compact machine-level VFDs.

The actual motor selection should always be based on the motor nameplate current and the required duty rating rather than relying only on the motor’s kW value.

For example, two motors with the same nominal power can have different current requirements because of differences in:

• Motor efficiency.
• Motor power factor.
• Motor voltage.
• Motor construction.
• Motor duty.
• Application load.
• Operating conditions.

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7. 690 VAC Voltage Class

The drive is designed for the 690 VAC industrial voltage class.

This voltage level is frequently associated with large motors because increasing motor voltage can help manage current requirements at high power.

For a very large motor, using an appropriate high-voltage motor system can provide advantages in terms of current management and cable sizing.

The complete system must nevertheless be designed around the actual:

• Motor voltage.
• Motor current.
• Motor insulation.
• Cable system.
• Grounding arrangement.
• Transformer configuration.
• Protection system.

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8. Normal-Duty Power Rating

The model is generally associated with approximately:

800 HP / 600 kW normal-duty output

This is a useful figure when comparing the drive with large industrial motors.

The actual selection should be based on the motor’s rated current and the required overload profile.

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9. Physical Dimensions and Weight

The 20G11BF795JN2NNNNN is a large Frame 9 packaged drive.

For preliminary equipment planning, the following values can be used as approximate figures:

The approximate weight of 1246 kg should be considered when planning transportation, lifting and installation.

The exact physical dimensions can vary according to the packaged configuration and revision, so the final mechanical drawing should be used for actual cabinet construction, foundation preparation and replacement work.

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10. Mechanical Installation Requirements

Because the unit weighs roughly 1.25 tonnes, it is not a small cabinet-mounted component.

Installation planning should include:

• Floor loading capacity.
• Forklift or lifting equipment.
• Transportation route.
• Door and access dimensions.
• Cabinet ventilation.
• Cable routing.
• Maintenance access.
• Electrical clearances.
• Heat dissipation.

The equipment room should also have sufficient ventilation to prevent the accumulated heat from affecting the drive.

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11. Air-Cooled Construction

The drive uses an air-cooled design.

Large power semiconductor devices generate considerable heat during operation.

The cooling system therefore needs to remove heat continuously.

Important installation conditions include:

Good airflow management is particularly important for high-current equipment.

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12. Door-Mounted Enhanced LCD HIM

One of the main features of the JN2 configuration is the door-mounted Enhanced LCD Human Interface Module.

This provides a local interface for operating and monitoring the drive.

The interface can be useful for:

• Viewing drive status.
• Checking operating parameters.
• Reviewing fault information.
• Entering settings.
• Monitoring motor conditions.
• Performing commissioning.
• Troubleshooting.

This makes the JN2 configuration particularly attractive for installations where technicians need local access to the drive.

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13. Local Operator Convenience

A door-mounted HIM eliminates the need to access the internal drive simply to check basic information.

For a large floor-standing drive, this can be especially convenient.

A technician can typically remain outside the main electrical cabinet while checking operating information through the local interface.

This is useful during:

• Commissioning.
• Startup.
• Maintenance.
• Fault investigation.
• Parameter verification.
• Production troubleshooting.

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14. Filtered Configuration

The drive is configured as:

Filtered — CM Jumper Installed

Filtering is useful in industrial electrical environments because high-power switching equipment can generate electrical noise.

Proper system design should still include:

• Correct grounding.
• Proper bonding.
• Appropriate motor cable.
• Cable shielding where required.
• Separation of power and control wiring.
• Proper cabinet construction.

The filter should be considered one component of the overall EMC strategy rather than a complete solution by itself.

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15. Common-Mode Capacitor Jumper

The catalog configuration includes a:

Common-Mode Capacitor Jumper — Installed

This setting affects the drive’s electrical configuration relative to ground.

It should be considered when replacing another drive because two models with identical voltage and current ratings may still have different grounding-related configurations.

For replacement projects, it is therefore better to match the complete catalog number instead of matching only:

20G11BF795

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16. Dynamic Braking

The specified configuration has:

Dynamic Braking — None

This is an important selection point.

When a large motor decelerates, the motor can return energy toward the drive’s DC bus.

In applications where rapid deceleration is required, the braking strategy needs to be evaluated.

This is particularly relevant to:

• Large conveyors.
• High-inertia machinery.
• Centrifuges.
• Large fans.
• Material-handling equipment.
• Heavy rotating machines.

If the application requires aggressive braking, the system designer should evaluate whether additional braking equipment or another drive configuration is appropriate.

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17. Typical Applications

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18. Conveyor Applications

Large conveyor systems are one of the most natural applications for a high-current drive.

A long conveyor may contain substantial mechanical inertia.

A direct motor start can create a sudden mechanical load.

With a variable-frequency drive, the motor can accelerate progressively.

Potential benefits include:

• Smooth acceleration.
• Reduced belt shock.
• Reduced gearbox stress.
• Reduced coupling stress.
• Adjustable conveyor speed.
• Better material-flow control.
• Easier coordination with other conveyors.
• Improved production flexibility.

The 795 A rating provides substantial capacity for very large conveyor motors.

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19. Mining Applications

The drive can be considered for large mining applications.

Typical equipment includes:

• Overland conveyors.
• Ore conveyors.
• Crushers and associated machinery.
• Material transfer systems.
• Large pumps.
• Ventilation systems.
• Processing machinery.

Mining environments can be demanding because of:

• Dust.
• Vibration.
• Long operating hours.
• High mechanical loads.
• Temperature changes.

The electrical room and cabinet environment should therefore be designed appropriately.

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20. Pump Applications

Large industrial pumps often do not need to operate at full speed all the time.

The drive can adjust motor speed according to process demand.

Potential applications include:

• Water transfer.
• Cooling-water systems.
• Industrial process pumps.
• Wastewater systems.
• Large circulation pumps.
• Mining dewatering systems.

Variable-speed operation can provide more flexible control of:

• Flow.
• Pressure.
• Tank level.
• Process demand.

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21. Fan and Blower Applications

Large fans and blowers can consume significant electrical power.

A variable-speed drive allows the motor speed to be adjusted according to the required airflow.

Potential applications include:

• Industrial ventilation.
• Furnace systems.
• Exhaust systems.
• Dust collection.
• Combustion air.
• Process ventilation.
• Large aeration systems.

When the application operates below maximum speed for significant periods, variable-speed operation may provide meaningful energy savings depending on the fan system and operating profile.

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22. Cement and Heavy Manufacturing

Cement plants and heavy manufacturing facilities often use very large motors.

Possible applications include:

• Process fans.
• Large conveyors.
• Blowers.
• Pumps.
• Material-handling systems.
• Production equipment.

The large current capacity and industrial construction make the PowerFlex 755 platform suitable for this class of equipment.

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23. Oil, Gas and Process Applications

The drive can also be used as part of large process equipment where variable-speed motor control is required.

Potential equipment includes:

• Large pumps.
• Fans.
• Compressors.
• Process blowers.
• Material-handling equipment.

The exact suitability depends on the motor characteristics, hazardous-area requirements and overall electrical system design.

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24. Main Product Advantages

24.1 High Current Capacity

The 795 A rating gives the drive substantial capacity for large industrial motors.

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24.2 High-Power Motor Control

The approximately 600 kW / 800 HP normal-duty rating makes the unit appropriate for large industrial machinery.

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24.3 690 VAC Operation

The 690 VAC class is appropriate for large industrial motor systems.

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24.4 Local LCD Interface

The JN2 configuration includes a door-mounted enhanced LCD HIM.

This is one of the clearest practical advantages over configurations without a local operator interface.

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24.5 Industrial Networking

The PowerFlex 755 platform can be integrated into industrial automation architectures.

This makes it suitable for applications where drive control and machine control need to exchange operating information.

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24.6 Variable-Speed Control

The motor can operate at different speeds rather than being restricted to a single fixed operating point.

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24.7 Controlled Acceleration

The drive can provide controlled motor acceleration.

This can reduce mechanical stress during startup.

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24.8 Large Industrial Frame

Frame 9 construction provides the physical and electrical capacity required for high-power applications.

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24.9 Filtered Electrical Configuration

The filtered configuration is suitable for industrial environments where electromagnetic compatibility needs to be considered.

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25. Advantages of the JN2 Configuration

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26. Detailed Technical Parameter Table

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27. Five Recommended Same-Series or Closely Related Models

The following models are useful when comparing the 795 A version with nearby high-power PowerFlex 755 configurations.

The closest comparison to the target model is the 20G11BF795JN0NNNNN, because the electrical power class is essentially the same while the operator-interface configuration differs.

The 650 A, 710 A and 765 A versions are useful when the motor current requirement is lower.

The 960 A version is appropriate for applications requiring additional current capacity.

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28. Same-Series Model Comparison

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29. Five Recommended Same-Brand Popular Models

For a broader product selection, the following models can be considered as representative alternatives across different power levels.

These products cover substantially different power ranges.

The smaller models should not be regarded as direct electrical substitutes for the 795 A drive.

They are better understood as examples of the broader product range, allowing users to select a drive according to motor size and application requirements.

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30. Direct Comparison with the 795 A Version

The 20G11BF795JN2NNNNN sits between the 765 A and 960 A configurations.

This makes it a useful choice when a 765 A drive is too close to the motor’s required current but a 960 A unit would provide substantially more capacity than necessary.

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31. Why the 795 A Model Is Attractive

The 795 A configuration provides a balance between electrical capacity and application flexibility.

For example, a plant may have a motor whose full-load current is close to the upper range of a 765 A drive.

Selecting the 795 A model can provide additional capacity without moving immediately to the much larger 960 A class.

This can be useful for:

• Large conveyor systems.
• Large pumps.
• Large fans.
• Mining equipment.
• Cement machinery.
• Material-handling systems.
• Heavy process equipment.

The final choice should still be based on actual motor current, duty cycle and overload requirements.

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32. Maintenance Considerations

A drive of this size should be included in a planned maintenance program.

For a high-power drive, repeated trips should be investigated carefully.

Simply resetting the drive repeatedly without identifying the cause can result in unnecessary downtime and may conceal a developing electrical or mechanical problem.

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33. Installation and Engineering Considerations

The following items deserve particular attention when installing this model.

Electrical

The motor voltage and current must match the drive’s capabilities.

The incoming electrical system must also be designed for the required current, fault level and protection arrangement.

Mechanical

The approximately 1246 kg equipment weight means that the floor and handling system must be capable of supporting the unit.

Thermal

The electrical room must be able to dissipate the heat generated by the drive.

Cabling

Large motor cables require appropriate sizing, routing and termination.

Grounding

Grounding and bonding should be designed correctly to support both safety and EMC performance.

Braking

Because this configuration does not include dynamic braking, applications involving rapid deceleration should be reviewed separately.

Operator Interface

The JN2 configuration is advantageous when technicians need a local LCD interface for commissioning and troubleshooting.

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34. Product Selection Checklist

Before purchasing or replacing the drive, the following information should be confirmed.

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35. Overall Product Advantages

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36. Final Summary

The 20G11BF795JN2NNNNN is a PowerFlex 755 high-power air-cooled AC drive designed for large industrial motor applications.

Its core electrical characteristics are centered around a 690 VAC input class and 795 A current rating, with an approximately 600 kW / 800 HP normal-duty power class.

The large Frame 9 construction makes it suitable for applications where a compact drive is not sufficient.

The product is particularly appropriate for large conveyors, mining systems, pumps, fans, blowers, cement machinery, material-handling equipment and other heavy-duty rotating machinery.

One of the most important features of this specific catalog configuration is the door-mounted Enhanced LCD Human Interface Module with full numeric keypad.

This makes the model more convenient for commissioning, parameter adjustment, local monitoring and troubleshooting than a configuration without a local HIM.

The product also features a filtered configuration and installed common-mode capacitor jumper, together with AC input with precharge and DC terminals.

The configuration does not include dynamic braking, which should be considered carefully when the driven machine has high inertia or requires rapid deceleration.

From a mechanical perspective, this is substantial equipment. A practical planning figure is approximately 2450 mm high × 1200 mm wide × 800 mm deep, with a weight of approximately 1246 kg.

These dimensions and weight should be treated as preliminary planning values; the exact mechanical drawing should be used for final installation and replacement work.

For applications where the motor current is slightly below the 795 A class, the 650 A, 710 A and 765 A PowerFlex 755 configurations may be considered.

Where significantly more capacity is needed, the 960 A configuration provides a higher-current alternative.

For a direct comparison, the 20G11BF795JN0NNNNN is particularly relevant because it belongs to the same 795 A / 690 VAC class but has a different operator-interface configuration.

Overall, the 20G11BF795JN2NNNNN is best viewed as a large industrial variable-frequency drive for applications requiring high motor current, high power, variable-speed operation, industrial automation integration and convenient local operator access.