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1. Product Identification

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2. Product Introduction

The 20G11LC1K5JN0NNNNN is a high-power variable frequency drive designed for controlling large three-phase AC motors.

It belongs to the PowerFlex 755 series and is positioned toward the high-capacity end of the series.

With a rated current of approximately 1,480 A, the drive is intended for large industrial motor applications rather than small machine motors.

Its principal function is to regulate motor speed and torque by controlling the electrical frequency and voltage supplied to the motor.

This allows the motor to operate at a speed appropriate to the actual production requirement rather than simply running continuously at a fixed speed.

The model provides approximately 900 kW light-duty, 850 kW normal-duty, and 710 kW heavy-duty capability.

This combination makes it particularly relevant to large pumps, fans, blowers, conveyors, process machinery and other large motor-driven systems.

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3. Product Series

The product belongs to the PowerFlex 755 series.

The PowerFlex 755 platform is designed for industrial applications requiring a combination of motor control, networking, diagnostics, application flexibility and relatively high power capacity.

The series covers a broad range of motor sizes and voltage classes.

The 20G11LC1K5JN0NNNNN is specifically a high-power, air-cooled, 400 V AC configuration.

Its 800 mm deep MCC-style construction is intended for large industrial electrical installations where substantial power equipment must be integrated into an organized cabinet or equipment lineup.

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4. Main Electrical Specifications

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5. Light-Duty Rating — 900 kW

The light-duty rating is approximately 900 kW.

This rating is particularly relevant to applications where the motor load does not continuously demand the same level of overload capability as a heavy-duty application.

Large variable-torque loads are common candidates for this type of rating.

Examples include:

• Large centrifugal pumps
• Large ventilation fans
• Cooling fans
• Industrial blowers
• Water circulation systems
• Large air-handling systems

When selecting the drive, the 900 kW figure should not be considered independently of the motor nameplate current and actual load profile.

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6. Normal-Duty Rating — 850 kW

The normal-duty rating is approximately 850 kW.

This is an important reference point for general industrial motor applications.

A motor around this power level may be used in:

• Water treatment
• Industrial pumping
• Large conveyors
• Process ventilation
• Cooling systems
• Large fans
• Material handling
• General process machinery

The actual motor current, rather than motor kW alone, remains an important factor when determining whether this drive is appropriate.

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7. Heavy-Duty Rating — 710 kW

The heavy-duty rating is approximately 710 kW.

Heavy-duty operation generally involves a more demanding load profile.

Examples include equipment with:

• High starting torque
• High inertia
• Frequent acceleration
• Frequent deceleration
• Repeated overload requirements
• Difficult mechanical starting conditions
• Heavy material handling

For these applications, the heavy-duty rating should be used as the principal selection reference rather than the higher light-duty value.

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8. Mechanical Specifications

The drive is identified as an 800 mm deep MCC-style configuration.

The 800 mm depth is a particularly important planning dimension.

The exact width and height should be checked against the specific mechanical arrangement before preparing a cabinet layout or equipment room drawing.

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9. Weight Information

For equipment of this size, it is better to avoid presenting an estimated weight as though it were a guaranteed specification.

The actual mass can vary according to the final mechanical arrangement, factory-installed options, cabinet configuration and packaging.

For transportation, lifting, structural loading and installation planning, the actual equipment documentation should be used.

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10. Cooling System

The 20G11LC1K5JN0NNNNN uses forced-air cooling.

Because the drive is rated at approximately 1,480 A, substantial heat can be generated during operation.

Adequate airflow is therefore an important part of installation design.

The installation should provide:

• Sufficient ventilation
• Adequate clearance
• Clean air passages
• Proper cooling-fan operation
• Suitable ambient temperature
• Protection from excessive dust
• Proper cabinet airflow
• Routine inspection of cooling components

Poor ventilation can cause unnecessary thermal stress and may shorten the service life of power components.

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11. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication.

This allows the drive to be incorporated into an industrial automation network.

Typical information exchanged with a control system can include:

This communication capability is particularly useful in large production systems where the drive needs to exchange operating information with a PLC, HMI or supervisory control system.

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12. Product Applications

Large Pumping Systems

The drive is particularly suitable for evaluation in large pumping applications.

Typical examples include:

• Industrial water pumps
• Process-water pumps
• Cooling-water pumps
• Wastewater systems
• Water-transfer systems
• Large circulation pumps
• Utility pumping systems

Variable-speed control allows pump output to be adjusted according to the actual process requirement.

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Cooling Systems

Large industrial facilities frequently use high-power motors for cooling-water circulation.

Potential applications include:

• Cooling towers
• Heat-exchanger circulation
• Industrial cooling loops
• Central cooling systems
• Process cooling
• Utility cooling

The ability to adjust motor speed can help match pump operation to changing thermal loads.

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Large Fans

Large fans are another suitable application area.

Examples include:

• Industrial ventilation
• Furnace ventilation
• Exhaust systems
• Combustion-air systems
• Process-air systems
• Dust-control systems
• Cooling fans

Fan speed can be adjusted according to airflow requirements.

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Large Blowers

The model can also be considered for large blower systems.

Possible applications include:

• Aeration
• Process air
• Dust collection
• Industrial ventilation
• Combustion systems
• Air-supply systems
• Material processing

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Large Conveyor Systems

Large conveyors frequently require controlled acceleration and deceleration.

A variable frequency drive can provide a smoother transition between standstill and operating speed.

Potential applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk material handling
• Port material handling
• Heavy manufacturing

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13. Mining Applications

Mining equipment can contain extremely large motors.

Potential applications include:

• Long conveyors
• Dewatering pumps
• Ventilation fans
• Material-handling systems
• Processing equipment
• Crushing-related auxiliary equipment

The high current capacity of the drive makes it suitable for consideration where the motor and environmental requirements match the drive configuration.

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14. Cement and Aggregate Applications

Large cement and aggregate facilities commonly use high-power motor systems.

Potential applications include:

• Process fans
• Conveyors
• Large pumps
• Blowers
• Cooling equipment
• Material-handling machinery
• Process auxiliaries

The variable-speed function can be used to coordinate motor speed with the production process.

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15. Product Advantages

15.1 High Current Capacity

The 1,480 A current rating is one of the most significant characteristics of the model.

It places the drive in a high-power industrial category.

This allows it to be considered for very large low-voltage AC motors.

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15.2 High Power Capability

The drive provides three useful duty levels:

This provides greater application flexibility than a drive designed around only one load rating.

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15.3 Adjustable Motor Speed

The motor does not have to operate continuously at its maximum speed.

Speed can be adjusted according to:

• Flow
• Pressure
• Production rate
• Air volume
• Conveyor requirements
• Process demand

This makes the drive suitable for variable-speed industrial processes.

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15.4 Controlled Acceleration

A large motor can produce substantial mechanical stress when started abruptly.

Controlled acceleration allows the motor to reach operating speed in a more gradual manner.

This can help reduce mechanical shock on:

• Couplings
• Gearboxes
• Conveyor belts
• Pumps
• Fans
• Shafts
• Bearings

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15.5 Controlled Deceleration

Controlled stopping is also valuable for large rotating machinery.

It can help provide a predictable stopping profile and better coordination with the rest of the production system.

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15.6 Industrial Communication

Embedded EtherNet/IP provides a practical way to integrate the drive into an industrial control network.

This can simplify:

• Remote operation
• Status monitoring
• Fault diagnosis
• Speed control
• Process coordination
• Data collection

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15.7 Large-Scale Industrial Construction

The Frame 9 configuration is intended for substantial industrial installations.

The large mechanical format provides the necessary space for high-power electrical components and cooling arrangements.

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16. Detailed Parameter Table

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17. Five Same-Series or Closely Related Models

The following models are useful for comparison when selecting a PowerFlex 755 drive around the same power range.

The models above are especially useful because they remain close to the requested product in terms of voltage, frame, current and power range.

The K4 configuration provides a somewhat lower capacity.

The K5 configurations are in the same main capacity class as the requested unit.

The K6 configuration provides a higher current and power level.

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18. K4 / K5 / K6 Comparison

The K5 configuration is therefore a useful middle point between the lower-capacity K4 and higher-capacity K6 configurations.

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19. Five Additional Related Models

These models provide a practical progression when comparing drive capacity.

The lower-current models may be more economical when the motor does not require the full capacity of the requested unit.

The K6 model is useful when the motor current approaches or exceeds the upper range of the K5 configuration.

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20. Five Popular Models from the Same Brand

For a broader selection, the following models represent useful products from the same brand across different application sizes.

These provide a useful range for comparing smaller and larger motor-drive requirements.

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21. Product Comparison by Power

The requested 20G11LC1K5JN0NNNNN sits in a high-power range between the K4 and K6 configurations.

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22. Application Selection Guide

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23. Advantages Compared With a Conventional Starter

The principal advantage of a variable frequency drive is that the motor becomes part of the process-control system rather than simply being an on/off device.

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24. Important Selection Considerations

Before selecting this model for an actual installation, several parameters should be checked.

Motor Voltage

The motor must be compatible with the drive’s 400 V AC class.

Motor Current

The motor’s actual nameplate current should be compared with the drive’s applicable current rating.

Duty

The application should be classified as light duty, normal duty or heavy duty.

Torque

Constant-torque and variable-torque applications should be evaluated differently.

Starting Requirement

High-inertia machinery may require special attention to acceleration time and overload capability.

Ambient Conditions

Temperature, altitude, humidity, dust and ventilation can influence drive performance.

Cooling

The air-cooling system needs sufficient airflow and service clearance.

Mechanical Installation

The 800 mm depth must be considered when designing the electrical room or cabinet lineup.

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25. Recommended Maintenance Areas

For a large drive of this capacity, routine maintenance should normally focus on the following areas:

Preventive maintenance is particularly important for large industrial drives because a failure can affect a major part of the production process.

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26. Overall Assessment

The 20G11LC1K5JN0NNNNN is a high-capacity industrial variable frequency drive intended for large three-phase AC motors.

Its 1,480 A current rating and approximately 850 kW normal-duty rating place it firmly in the large industrial drive category.

The approximately 900 kW light-duty rating provides additional capacity for suitable variable-torque applications, while the approximately 710 kW heavy-duty rating gives a clear reference for more demanding load conditions.

Its Frame 9, forced-air cooling, 800 mm deep MCC-style construction, AC input with precharge, DC terminals, and embedded EtherNet/IP make it suitable for integration into substantial industrial electrical and automation systems.

The strongest application areas are large pumps, fans, blowers, conveyors, cooling systems, mining equipment, cement equipment, aggregate machinery and other process systems using high-power AC motors.

The most important advantage is the combination of large motor capacity and adjustable-speed process control.

Instead of operating the motor at one fixed speed, the drive can be integrated into the production process and used to regulate motor operation according to changing requirements.

For equipment such as pumps and fans, this can be particularly valuable because process demand often changes throughout the operating cycle.

For conveyors and heavy machinery, controlled acceleration and deceleration can provide smoother operation and reduce mechanical stress.

For automated plants, embedded EtherNet/IP provides an additional advantage because the drive can communicate operating data and commands with the larger control system.

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27. Final Specification Summary

In practical terms, the 20G11LC1K5JN0NNNNN is best viewed as a high-power, 400 V-class, 1,480 A variable-speed drive for large industrial motors, with the capacity and communication features needed for demanding automated process applications.

The closest comparisons are the K4, K5 and K6 configurations in the same PowerFlex 755 family. The K4 provides a lower capacity, the K5 is the requested high-power configuration, and the K6 moves upward to a higher current and power level.

For a final engineering selection, the most important figures to verify against the actual motor are rated voltage, nameplate current, normal-duty power, heavy-duty power, overload requirement, starting torque, acceleration time, environmental conditions and installation dimensions. The 800 mm depth should also be included in the mechanical layout, while the exact weight in kg should be taken from the final equipment configuration rather than estimated.