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Allen-Bradley 20G11BC1K4JN2NNNNN — Detailed Product Specifications, Introduction, Applications, Advantages and Recommended Models

1. Product Overview

The 20G11BC1K4JN2NNNNN is a high-power Allen-Bradley PowerFlex 755 AC drive designed for large industrial motor-control applications.

It belongs to the PowerFlex 755 family and is intended for demanding installations where the motor requires very high current capacity, stable speed regulation, industrial networking and centralized control.

This is a 400 V AC, three-phase, Frame 9, air-cooled drive with an output-current rating of approximately 1,465 A. Its published ratings are 850 kW Light Duty, 800 kW Normal Duty and 630 kW Heavy Duty. The unit uses a 600 mm deep MCC-style enclosure with an IP20 / NEMA Type 1 class arrangement.

The JN2 configuration is equipped with an enhanced LCD/full-numeric local HIM arrangement, making it different from the JN0 configuration, which is supplied without a local HIM. The JN2 configuration is therefore more convenient when technicians or operators need local access to drive parameters, status information and diagnostic functions.

2. Brand and Series

Item	Specification
Model	20G11BC1K4JN2NNNNN
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product type	High-Power AC Drive
Configuration	Air-Cooled PowerFlex 755 AC Drive
Application class	Industrial variable-frequency drive
Voltage class	400 V AC
Input	Three-phase AC
Frame	Frame 9
Cooling	Forced-air / air cooled
Enclosure	IP20 / NEMA Type 1 class
Cabinet style	600 mm Deep MCC Style
Product status	Active
Local interface	Enhanced LCD / Full Numeric HIM
Communication	Embedded EtherNet/IP

3. Main Technical Parameters

Parameter	Specification
Model	20G11BC1K4JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	AC variable-frequency drive
Input voltage	400 V AC
Input phase	3 phase
Input frequency	47–63 Hz
Output current	1,465 A
Light Duty rating	850 kW
Normal Duty rating	800 kW
Heavy Duty rating	630 kW
Approximate horsepower	1,400 HP
Frame	Frame 9
Cooling	Air cooled / forced air
Enclosure	IP20 / NEMA/UL Type 1
Cabinet style	600 mm Deep MCC Style
DC bus voltage	Approximately 540 V DC
Input arrangement	AC input with precharge / DC terminals
EMC filtering	Filtered
CM capacitor configuration	Jumper installed
Dynamic braking	None
Internal braking transistor	No
Communication	Embedded EtherNet/IP
Local operator interface	Enhanced LCD, full numeric HIM
Installation	Industrial cabinet / MCC
Depth	600 mm class
Height	Configuration dependent; verify final mechanical drawing
Width	Configuration dependent; verify final mechanical drawing
Weight (kg)	Approximately 1,270 kg
Approximate weight	Approximately 2,800 lb
Approximate mass	1.27 metric tons

4. Electrical Rating

The most important specification of the 20G11BC1K4JN2NNNNN is its very high current capability.

The drive is rated at approximately 1,465 A and supports 850 kW Light Duty, 800 kW Normal Duty and 630 kW Heavy Duty operation.

These ratings allow the same basic drive platform to be considered for different types of industrial loads.

For example, a large centrifugal pump or fan may be suitable for the higher Light Duty rating because these applications generally have a variable-torque characteristic.

A conveyor or other demanding mechanical load may instead require evaluation against the Heavy Duty rating because acceleration, starting torque and overload requirements can be more demanding.

5. Power Rating Table

Duty Type	Rating
Light Duty	850 kW
Normal Duty	800 kW
Heavy Duty	630 kW
Output current	1,465 A
Approximate horsepower	1,400 HP
Voltage	400 V AC
Phase	3 phase

6. Product Introduction

The 20G11BC1K4JN2NNNNN is designed to control large three-phase AC motors by varying the frequency and voltage supplied to the motor.

Instead of operating the motor only at full speed, the drive allows motor speed to be adjusted according to process requirements.

This makes it possible to control equipment such as large pumps, fans, blowers, conveyors and process machines.

The drive sits between the plant electrical supply and the motor.

A simplified power path is:

Three-Phase AC Supply

↓

Input / Precharge Section

↓

Converter

↓

DC Link

↓

Inverter

↓

Variable-Frequency AC Output

↓

Large Industrial Motor

↓

Process Equipment

7. PowerFlex 755 Series

The PowerFlex 755 series is designed for industrial applications where flexible motor control and integration with automation systems are important.

The platform is suitable for applications that require more than simple speed control.

Depending on the complete configuration, the system can provide functions related to:

• Motor speed control.
• Torque control.
• Acceleration and deceleration.
• Process control.
• Networked control.
• Fault monitoring.
• Diagnostic information.
• Local operator interaction.
• Centralized PLC control.

8. High-Power Industrial Design

The 20G11BC1K4JN2NNNNN should not be viewed as a compact machine-level inverter.

With approximately 1,465 A of output current and a mass of roughly 1.27 tonnes, this is major industrial electrical equipment.

It is normally installed in an engineered electrical room, MCC area or centralized motor-control installation.

Typical installation environments include:

• Large manufacturing facilities.
• Water-treatment plants.
• Wastewater plants.
• Mining operations.
• Cement plants.
• Steel and metal-processing facilities.
• Large pumping stations.
• Industrial ventilation systems.
• Process plants.
• Large material-handling installations.

9. Local HIM — JN2 Configuration

One of the notable differences between the JN2 and JN0 configurations is the local operator interface.

The JN2 configuration is described with an enhanced LCD and full numeric HIM.

This is useful during commissioning and maintenance.

A technician can use the local interface to access drive information without relying entirely on a remote PLC or HMI.

Typical local activities include:

• Viewing drive status.
• Reviewing fault information.
• Checking parameters.
• Monitoring motor operation.
• Adjusting selected settings.
• Performing commissioning procedures.
• Diagnosing operating problems.

10. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication.

This makes the 20G11BC1K4JN2NNNNN suitable for integration into a plant-wide industrial Ethernet architecture.

A typical arrangement can be represented as:

Plant PLC

↓

Industrial Ethernet

↓

PowerFlex 755

↓

20G11BC1K4JN2NNNNN

↓

Large Motor

↓

Pump / Fan / Conveyor / Process Machine

This type of architecture can reduce the need for large quantities of individual hardwired control signals.

11. Communication Advantages

The embedded network interface can be used for exchanging information such as:

• Start command.
• Stop command.
• Speed reference.
• Actual speed.
• Output current.
• Drive status.
• Fault status.
• Alarm information.
• Operating feedback.
• Diagnostic information.

12. Input Configuration

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

For a drive of this size, controlled energization of the DC-link system is particularly important.

The precharge function helps manage the initial charging of the DC-link capacitors when the drive is energized.

This is one reason why high-power drive installations require carefully designed input protection and switching arrangements.

13. EMC Filtering

The 20G11BC1K4JN2NNNNN is configured with filtering and a CM jumper installed.

This is useful in industrial environments where the drive operates close to:

• PLC systems.
• Ethernet networks.
• Sensors.
• Instrumentation.
• Measurement equipment.
• Other variable-frequency drives.

Good grounding and cable-routing practices remain important even when filtering is included.

14. Dynamic Braking

The catalog configuration is specified with no dynamic braking and no internal braking transistor.

This does not mean that the drive cannot control deceleration.

It means that applications requiring dissipation of significant regenerative energy need additional engineering consideration.

For example, a large pump that naturally decelerates over a relatively long period may have very different braking requirements from a large conveyor that must stop quickly.

15. Dimensions

The model is specified as a 600 mm deep MCC-style PowerFlex 755 configuration.

Because large Frame 9 drives can have configuration-dependent mechanical arrangements, the final height and width should be taken from the applicable mechanical drawing rather than estimated.

Mechanical Parameter	Specification
Model	20G11BC1K4JN2NNNNN
Frame	Frame 9
Cabinet style	MCC style
Depth	600 mm
Height	Configuration dependent
Width	Configuration dependent
Cooling	Air cooled
Enclosure	IP20 / NEMA Type 1 class
Installation	Industrial electrical room / MCC

The 600 mm depth should be considered during the initial cabinet-layout stage.

16. Weight

The listed weight is approximately 2,800 lb, equivalent to approximately 1,270 kg.

Weight Information	Value
Model	20G11BC1K4JN2NNNNN
Weight	Approximately 1,270 kg
Imperial weight	Approximately 2,800 lb
Metric mass	Approximately 1.27 tonnes
Equipment class	Heavy industrial electrical equipment

This weight is significant enough that transportation and lifting must be included in the project plan.

The installation team should verify the actual shipping configuration and lifting requirements before moving the equipment.

17. Typical Applications

Application	Suitability	Typical Reason
Large centrifugal pumps	Excellent	Variable flow control
Water-treatment pumps	Excellent	Flow and pressure regulation
Wastewater systems	Excellent	Process flow control
Large fans	Excellent	Airflow regulation
Large blowers	Excellent	Process-air control
Cooling-water pumps	Excellent	Cooling demand control
Industrial ventilation	Excellent	Variable airflow
Large conveyors	Very good	Controlled acceleration
Mining equipment	Very good	High-power motor control
Cement equipment	Very good	Large process motors
Material handling	Very good	Speed and torque control
Process machinery	Very good	Variable-speed operation
High-inertia equipment	Good	Requires braking analysis

18. Application — Large Pumps

Large pumping systems are among the most suitable applications for this drive.

Potential applications include:

• Raw-water pumps.
• High-pressure pumps.
• Cooling-water pumps.
• Circulation pumps.
• Wastewater pumps.
• Process pumps.
• Irrigation pumps.

The ability to adjust motor speed can help the process respond to changing flow requirements.

19. Application — Water Treatment

Water-treatment facilities often contain large motors that operate for long periods.

The drive can be considered for:

• Raw-water transfer.
• Water distribution.
• Filtration systems.
• Process circulation.
• Aeration blowers.
• Wastewater pumping.
• Sludge-processing systems.

20. Application — Large Fans

Large fans can require hundreds of kilowatts of motor power.

Typical applications include:

• Furnace exhaust.
• Industrial ventilation.
• Dust extraction.
• Mine ventilation.
• Tunnel ventilation.
• Process exhaust.
• Combustion air.

Variable-speed operation allows airflow to be adjusted to process demand rather than relying exclusively on fixed-speed operation.

21. Application — Blowers

Large blowers are common in process industries and wastewater facilities.

The drive can regulate blower speed based on process requirements.

Potential benefits include:

• Improved airflow control.
• Reduced mechanical stress.
• Smoother acceleration.
• Better process response.
• Centralized monitoring.

22. Application — Mining

Mining applications can involve extremely large motors.

The PowerFlex 755 platform can be considered for:

• Conveyors.
• Dewatering pumps.
• Ventilation fans.
• Material-handling systems.
• Processing equipment.
• Auxiliary process machinery.

Mining applications require additional consideration of dust, vibration, ambient temperature and maintenance access.

23. Application — Cement Plants

Cement plants contain many high-power rotating machines.

Typical applications include:

• Large process fans.
• Exhaust fans.
• Conveyors.
• Blowers.
• Pumps.
• Dust-collection systems.
• Material-handling equipment.

The high current capability of the 20G11BC1K4JN2NNNNN makes it suitable for major motor loads within this type of facility.

24. Application — Conveyors

Large conveyors often have substantial mechanical inertia.

A controlled acceleration profile can reduce mechanical shock.

This can be beneficial for:

• Belts.
• Gearboxes.
• Couplings.
• Shafts.
• Bearings.
• Mechanical drive components.

For long or inclined conveyors, the actual starting torque and regenerative behavior should be analyzed carefully.

25. Application — Industrial Ventilation

Industrial ventilation systems often operate under changing process conditions.

The drive can adjust fan speed according to:

• Temperature.
• Pressure.
• Airflow.
• Production demand.
• Process requirements.

This makes variable-speed control particularly useful for large industrial ventilation systems.

26. Main Product Advantages

Advantage	Description
Very high current capacity	1,465 A
High Normal Duty rating	800 kW
High Light Duty rating	850 kW
Heavy Duty rating	630 kW
Frame 9 construction	Designed for large motors
Air cooling	Practical for engineered electrical rooms
Embedded EtherNet/IP	Networked automation capability
Local LCD/HIM	Convenient commissioning and diagnostics
EMC filtering	Helps manage electrical noise
AC precharge	Appropriate for high-power DC-link systems
600 mm MCC-style depth	Suitable for centralized installations
PowerFlex 755 platform	Broad industrial application range
High-power capability	Suitable for major industrial motors

27. Advantage — High Current Capacity

The approximately 1,465 A output-current rating is the defining feature of this model.

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

This allows the drive to control motors that are far beyond the range of compact variable-frequency drives.

28. Advantage — 850 kW Light Duty

The 850 kW Light Duty rating is particularly useful for variable-torque applications.

Typical examples include:

• Centrifugal pumps.
• Large fans.
• Cooling systems.
• Certain blowers.

In these applications, the motor load can vary substantially with speed.

29. Advantage — 800 kW Normal Duty

The 800 kW Normal Duty rating provides a large operating range for industrial motor applications.

It is particularly relevant when the motor operates under relatively stable loading conditions.

30. Advantage — 630 kW Heavy Duty

The 630 kW Heavy Duty rating provides a reference for more demanding load profiles.

Heavy Duty selection should be considered when the application requires significant overload capability or starting torque.

The actual motor current and duty cycle should always be checked before final selection.

31. Advantage — Local Operator Interface

The JN2 configuration provides a local enhanced LCD/full-numeric interface.

This can make commissioning more convenient.

A technician can inspect the drive without always needing to connect through a remote control system.

This is particularly useful during:

• Initial startup.
• Maintenance.
• Fault diagnosis.
• Parameter verification.
• Motor testing.

32. Advantage — Industrial Ethernet

Embedded EtherNet/IP simplifies integration into an industrial control architecture.

This is particularly useful for facilities that already use Ethernet-based PLC and HMI systems.

33. Advantage — Air-Cooled Construction

Air cooling eliminates the need for a dedicated liquid-cooling circuit.

This can simplify the overall installation.

However, the electrical room must be capable of handling the heat generated by a drive of this size.

34. Advantage — Industrial Enclosure

The IP20 / NEMA Type 1 class arrangement is suitable for a controlled electrical-room environment.

It is not intended to be treated as a weatherproof or washdown enclosure.

Outdoor or harsh environments require additional enclosure and environmental engineering.

35. Advantage — Standardized Platform

A facility using multiple PowerFlex 755 drives can standardize many aspects of:

• Maintenance.
• Troubleshooting.
• Operator training.
• Parameter management.
• Spare-parts planning.
• Network integration.

This can be valuable in large plants with many variable-speed motors.

36. Installation Considerations

Because this drive operates at very high current, installation requires considerably more planning than a small VFD.

Important considerations include:

• Transformer capacity.
• Short-circuit current.
• Protection coordination.
• Incoming cable sizing.
• Motor-cable sizing.
• Grounding.
• EMC.
• Ventilation.
• Cabinet clearance.
• Mechanical support.
• Lifting requirements.

37. Electrical Room Requirements

The installation area should provide sufficient space for:

• Incoming cables.
• Motor cables.
• Network cables.
• Ventilation.
• Maintenance.
• Inspection.
• Isolation.
• Heat removal.

The 600 mm cabinet depth must be incorporated into the layout from the beginning.

38. Thermal Management

An air-cooled drive of this power level generates substantial heat.

The electrical room should therefore be designed around the actual thermal load.

Poor ventilation can cause:

• Higher component temperatures.
• Cooling-fan stress.
• Thermal trips.
• Reduced service life.
• Increased maintenance.
• Unexpected downtime.

39. Floor Loading and Mechanical Handling

With a weight of approximately 1,270 kg, the drive is a major mechanical load.

Before installation, the project team should check:

• Floor loading.
• Raised-floor capacity.
• Door dimensions.
• Corridor clearance.
• Elevator capacity.
• Forklift capacity.
• Crane capacity.
• Lifting points.
• Final cabinet location.

40. Cable Considerations

The approximately 1,465 A current level makes cable engineering particularly important.

The installation may require multiple parallel conductors depending on the system design.

The following should be evaluated:

• Conductor size.
• Number of parallel conductors.
• Cable temperature.
• Installation method.
• Voltage drop.
• Short-circuit withstand.
• Terminal arrangement.
• Grounding conductors.

41. Motor Selection

The drive should be matched to the actual motor nameplate.

Important parameters include:

Motor Parameter	Importance
Motor voltage	Must match drive voltage class
Motor current	Primary drive-sizing parameter
Motor kW	General power reference
Motor frequency	Required operating frequency
Motor speed	Defines operating range
Motor torque	Important for load matching
Starting torque	Important for demanding loads
Duty cycle	Determines thermal requirements
Acceleration time	Influences current demand
Deceleration time	Determines braking requirements
Motor cable length	Influences installation
Motor insulation	Important for inverter operation

42. Motor Current vs. Motor Power

Motor kW alone should not be used as the only basis for selecting the drive.

Actual motor current depends on:

• Motor voltage.
• Efficiency.
• Power factor.
• Motor construction.
• Operating conditions.
• Load characteristics.

The motor nameplate current should therefore be compared against the appropriate drive current rating.

43. Braking Requirements

Because this configuration has no internal dynamic-braking transistor, braking requirements should be evaluated during system design.

A large pump may naturally decelerate slowly.

A large conveyor may need much faster deceleration.

A high-inertia machine can also return substantial energy to the drive during deceleration.

The engineering team should determine whether the application requires:

• Natural deceleration.
• Controlled deceleration.
• Dynamic braking.
• Regenerative operation.
• Another energy-management solution.

44. Preventive Maintenance

A high-power drive should be included in a structured preventive-maintenance program.

Maintenance Item	Recommended Inspection
Cooling fans	Check operation and abnormal noise
Air passages	Keep clear
Cabinet	Check for dust and contamination
Power connections	Inspect for overheating
Grounding	Verify continuity and condition
Control wiring	Inspect connections
Ethernet cables	Check condition
Fault history	Review periodically
Motor cable	Inspect insulation and termination
Parameters	Maintain backup
Ambient temperature	Monitor
Vibration	Investigate abnormal changes

45. Commissioning Procedure

A practical commissioning process can be organized as follows.

Step 1 — Verify the Catalog Number

Confirm:

20G11BC1K4JN2NNNNN

The complete catalog number should match the engineering documentation.

Step 2 — Verify Incoming Power

Confirm:

• 400 V class supply.
• Three-phase configuration.
• Frequency.
• Grounding.
• Protection.

Step 3 — Verify Motor Data

Check the motor nameplate for:

• Voltage.
• Current.
• Power.
• Frequency.
• Speed.
• Power factor.
• Duty.

Step 4 — Enter Motor Parameters

Enter the actual motor nameplate information rather than relying on generic values.

Step 5 — Verify Rotation

Perform a controlled low-speed test.

Step 6 — Check Current

Observe the motor current under no-load and operating conditions.

Step 7 — Test Acceleration

Gradually increase speed and monitor the mechanical system.

Step 8 — Test Deceleration

Confirm that the selected deceleration profile is suitable for the load.

Step 9 — Test Local HIM

Use the JN2 interface to verify:

• Status.
• Parameters.
• Fault history.
• Operating values.

Step 10 — Test Network Communication

Verify:

• Start command.
• Stop command.
• Speed reference.
• Status feedback.
• Fault feedback.
• Alarm information.

46. Recommended Same-Series Models

The following five models are useful comparisons within the same PowerFlex 755 high-power family.

Model	Voltage	Output Current	LD	ND	HD	Frame	Depth	Weight
20G11BC910JN2NNNNN	400 V	910 A	560 kW	500 kW	400 kW	9	600 mm	Configuration dependent
20G11BC1K2JN2NNNNN	400 V	1,175 A	710 kW class	710 kW	560 kW	9	600 mm class	~1,250 kg class
20G11BC1K4JN0NNNNN	400 V	1,465 A	850 kW	800 kW	630 kW	9	600 mm	~1,270 kg
20G11BC1K4JN4NNNNN	400 V	1,465 A	850 kW class	800 kW	630 kW	9	600 mm	~1,270 kg class
20G11BC1K5JN2NNNNN	400 V	~1,480 A class	Higher-power class	~850 kW class	~710 kW class	9	600 mm class	Configuration dependent

These models are closely related to the target model and can be useful when selecting a replacement, comparing current capacity or choosing a different operator-interface configuration.

The PowerFlex 755 product family includes multiple configurations of the 910 A, 1,175 A, 1,465 A and higher-current classes.

47. Recommended Model 1 — 20G11BC910JN2NNNNN

The 20G11BC910JN2NNNNN is a lower-current Frame 9 PowerFlex 755 configuration.

Parameter	Specification
Model	20G11BC910JN2NNNNN
Series	PowerFlex 755
Voltage	400 V AC
Output current	910 A
Light Duty	560 kW
Normal Duty	500 kW
Heavy Duty	400 kW
Frame	Frame 9
Cooling	Air cooled
Enclosure	IP20 / Type 1 class
Cabinet depth	600 mm
Filtering	Yes
CM jumper	Installed
Dynamic braking	None
HIM	JN2
Depth	600 mm
Height	Configuration dependent
Width	Configuration dependent
Weight (kg)	Configuration dependent

This is useful when the target motor current is substantially lower than 1,465 A.

48. Recommended Model 2 — 20G11BC1K2JN2NNNNN

The 20G11BC1K2JN2NNNNN provides a lower current level while remaining in the same general high-power family.

Parameter	Specification
Model	20G11BC1K2JN2NNNNN
Series	PowerFlex 755
Voltage	400 V AC
Output current	1,175 A
Normal Duty	710 kW
Heavy Duty	560 kW
Frame	Frame 9
Cooling	Air cooled
Enclosure	IP20 / Type 1 class
Cabinet style	600 mm MCC style
Filtering	Yes
CM jumper	Installed
Dynamic braking	None
HIM	JN2
Depth	600 mm class
Height	Configuration dependent
Width	Configuration dependent
Weight (kg)	Approximately 1,250 kg class

This model is a practical alternative when the 1,465 A capacity of the target model is not necessary.

49. Recommended Model 3 — 20G11BC1K4JN0NNNNN

The 20G11BC1K4JN0NNNNN is electrically very close to the target model.

Parameter	Specification
Model	20G11BC1K4JN0NNNNN
Series	PowerFlex 755
Voltage	400 V AC
Output current	1,465 A
Light Duty	850 kW
Normal Duty	800 kW
Heavy Duty	630 kW
Frame	Frame 9
Cooling	Air cooled
Enclosure	IP20 / Type 1 class
Cabinet depth	600 mm
Filtering	Yes
CM jumper	Installed
Dynamic braking	None
HIM	JN0 / no local HIM
Depth	600 mm
Height	Configuration dependent
Width	Configuration dependent
Weight (kg)	Approximately 1,270 kg

The main practical difference is the local-interface configuration.

50. Recommended Model 4 — 20G11BC1K4JN4NNNNN

The 20G11BC1K4JN4NNNNN is another closely related 1K4 configuration.

Parameter	Specification
Model	20G11BC1K4JN4NNNNN
Series	PowerFlex 755
Voltage	400 V AC
Output current	1,465 A
Light Duty	850 kW class
Normal Duty	800 kW
Heavy Duty	630 kW
Frame	Frame 9
Cooling	Air cooled
Enclosure	IP20 / Type 1 class
Cabinet depth	600 mm
Input	AC with precharge
Filtering	Yes
Dynamic braking	None
HIM configuration	JN4
Depth	600 mm
Height	Configuration dependent
Width	Configuration dependent
Weight (kg)	Approximately 1,270 kg class

This is useful when the application needs the same general 1K4 electrical rating but a different interface configuration.

51. Recommended Model 5 — 20G11BC1K5JN2NNNNN

The 20G11BC1K5JN2NNNNN is a higher-capacity related configuration.

Parameter	Specification
Model	20G11BC1K5JN2NNNNN
Series	PowerFlex 755
Voltage	400 V AC class
Output current	Approximately 1,480 A class
Normal Duty	Approximately 850 kW class
Heavy Duty	Approximately 710 kW class
Frame	Frame 9
Cooling	Air cooled
Enclosure	IP20 / Type 1 class
Cabinet	MCC style
Filtering	Yes
Dynamic braking	None
HIM	JN2
Depth	600 mm class
Height	Configuration dependent
Width	Configuration dependent
Weight (kg)	Configuration dependent

This option is worth considering when the motor operating point requires more capacity than the 1K4 configuration.

52. Five Popular / Recommended Models Under the Same Brand

For a broader selection, the following five models cover several different power ranges.

Model	Series	Voltage	Current / Power	Frame	Dimensions	Weight
20G11BC1K4JN2NNNNN	PowerFlex 755	400 V	1,465 A / 800 kW ND	9	600 mm deep	~1,270 kg
20G11BC1K2JN2NNNNN	PowerFlex 755	400 V	1,175 A / 710 kW ND	9	600 mm class	~1,250 kg class
20G11BC910JN2NNNNN	PowerFlex 755	400 V	910 A / 500 kW ND	9	600 mm	Configuration dependent
20G11BC1K5JN2NNNNN	PowerFlex 755	400 V	~1,480 A / ~850 kW ND class	9	600 mm class	Configuration dependent
25B-D030N114	PowerFlex 525	380–480 V	~30 A / ~15 kW class	D	Compact	~18 kg class

53. Smaller PowerFlex Alternative

The 25B-D030N114 is substantially smaller than the target drive.

It is intended for machine-level applications rather than 800 kW-class industrial motor systems.

Parameter	Specification
Model	25B-D030N114
Series	PowerFlex 525
Voltage	380–480 V AC
Input phase	Three phase
Output current	Approximately 30 A
Normal Duty power	Approximately 15 kW
Heavy Duty power	Approximately 11 kW
Frame	Frame D
Cooling	Forced air
Enclosure	IP20 class
Communication	Embedded EtherNet/IP
Dimensions	Compact Frame D configuration
Weight (kg)	Approximately 18 kg class

It is therefore not a direct replacement for the 20G11BC1K4JN2NNNNN.

It is included as a same-brand alternative for applications where the motor size is dramatically smaller.

54. Same-Series Comparison

Model	Current	LD	ND	HD	Frame	Cooling	Depth	Approx. Weight
20G11BC910JN2NNNNN	910 A	560 kW	500 kW	400 kW	9	Air	600 mm	Configuration dependent
20G11BC1K2JN2NNNNN	1,175 A	710 kW class	710 kW	560 kW	9	Air	600 mm class	~1,250 kg
20G11BC1K4JN0NNNNN	1,465 A	850 kW	800 kW	630 kW	9	Air	600 mm	~1,270 kg
20G11BC1K4JN2NNNNN	1,465 A	850 kW	800 kW	630 kW	9	Air	600 mm	~1,270 kg
20G11BC1K4JN4NNNNN	1,465 A	850 kW class	800 kW	630 kW	9	Air	600 mm	~1,270 kg

55. Application Selection Guide

Application	Recommended Configuration
Large centrifugal pump	1K2 / 1K4
Very large centrifugal pump	1K4
Large cooling-water pump	1K4
Water-treatment blower	1K2 / 1K4
Large process fan	1K4
Mine ventilation fan	1K4
Large conveyor	1K2 / 1K4
Heavy conveyor	1K4 with braking evaluation
Cement-process fan	1K4
Industrial ventilation	1K4
Smaller industrial motor	910 A class or lower
Machine-level motor	PowerFlex 525 class

56. Why the 20G11BC1K4JN2NNNNN Is Attractive for Large Plants

For a large industrial facility, selecting a drive is not only about motor power.

The engineering team also has to consider:

• Network integration.
• Operator interface.
• Maintenance.
• Spare parts.
• Cooling.
• Cabinet dimensions.
• Installation weight.
• Motor-cable requirements.
• Braking.
• Duty cycle.

The 20G11BC1K4JN2NNNNN provides a combination of high current capacity and industrial-control functionality that makes it suitable for centralized motor-control applications.

57. Local Control vs. Remote Control

The JN2 configuration can be advantageous when both local and remote control are required.

During normal plant operation, the drive can be controlled through the automation system.

During maintenance, the local HIM provides another convenient interface for technicians.

This dual approach can simplify commissioning and troubleshooting.

58. Maintenance Advantages of the JN2 Configuration

A local operator interface can make troubleshooting faster.

For example, a technician can inspect drive information directly at the cabinet instead of depending completely on the central control room.

This can be especially useful when:

• The PLC is offline.
• Network communication is unavailable.
• The machine is undergoing commissioning.
• A technician is working directly at the MCC.
• A fault needs to be diagnosed locally.

59. Industrial Reliability Considerations

The drive’s reliability depends on more than the electronic hardware itself.

The installation environment is equally important.

A properly engineered installation should control:

• Temperature.
• Dust.
• Humidity.
• Condensation.
• Vibration.
• Electrical noise.
• Cooling airflow.
• Grounding.

60. Environmental Considerations

The IP20 / NEMA Type 1 class enclosure means that the drive should be installed in an appropriate controlled environment.

It should not be treated as a standalone outdoor enclosure.

For harsh environments, the overall installation may require:

• Additional cabinet protection.
• Environmental filtration.
• Air conditioning.
• Controlled ventilation.
• Corrosion protection.
• Dust management.

61. Transportation and Installation

A drive weighing approximately 1,270 kg requires serious logistics planning.

The project team should establish the transportation route before delivery.

The following should be checked:

Factory loading

Truck transportation

Plant entrance

Unloading equipment

Forklift or crane

Floor capacity

Final positioning

Cable access

Maintenance clearance

62. Spare-Parts Planning

For a plant with several PowerFlex 755 units, spare-parts planning can reduce downtime.

Potentially important spare categories include:

• Cooling fans.
• Control components.
• Interface components.
• Network-related components.
• Power components.
• Fuses and protection devices.
• Connection hardware.

The exact spare-parts list should be based on the complete installed configuration.

63. Parameter Backup

The drive parameters should be backed up after commissioning.

A backup can be useful if:

• The control hardware is replaced.
• Parameters are accidentally changed.
• A major maintenance event occurs.
• The drive needs to be replaced.
• A troubleshooting procedure requires restoring known-good settings.

64. Troubleshooting Strategy

A systematic troubleshooting process should begin with the fault information.

A useful sequence is:

Drive Fault

↓

Check Fault Code

↓

Check Incoming Power

↓

Check Motor Current

↓

Check Motor

↓

Check Mechanical Load

↓

Check Cooling

↓

Check Parameters

↓

Check Communication

This avoids unnecessarily replacing expensive drive components when the actual problem is external.

65. High-Power Drive Safety

Because this equipment operates at high electrical power, maintenance must be performed using appropriate industrial electrical safety procedures.

Particular attention should be paid to:

• Isolation.
• Lockout/tagout.
• Verification of absence of voltage.
• Stored electrical energy.
• DC-link discharge.
• Grounding.
• Arc-flash requirements.
• Qualified personnel.

The large DC-link system should never be treated as if it were a small low-power drive.

66. Overall Product Advantages

The 20G11BC1K4JN2NNNNN combines several characteristics that are valuable for major industrial applications.

Its 1,465 A output capacity allows it to control very large motors.

Its 800 kW Normal Duty rating makes it suitable for major process equipment.

Its 850 kW Light Duty rating is particularly useful for variable-torque loads.

Its 630 kW Heavy Duty rating provides a lower power limit for more demanding load conditions.

Its Frame 9 / 600 mm MCC-style construction is designed for centralized industrial installations.

Its air-cooled design can be integrated into a properly ventilated electrical room.

Its embedded EtherNet/IP capability makes it suitable for networked automation.

Its JN2 local HIM provides convenient access for commissioning and troubleshooting.

67. Final Detailed Specification Table

Category	Specification
Model	20G11BC1K4JN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product	PowerFlex 755 Air-Cooled AC Drive
Product category	High-power variable-frequency drive
Lifecycle	Active
Voltage	400 V AC
Input phase	3 phase
Input frequency	47–63 Hz
Output current	1,465 A
Light Duty	850 kW
Normal Duty	800 kW
Heavy Duty	630 kW
Approx. horsepower	1,400 HP
Frame	Frame 9
Cooling	Air cooled / forced air
Enclosure	IP20 / NEMA Type 1
Cabinet style	600 mm Deep MCC Style
Input	AC input with precharge / DC terminals
Filtering	Filtered
CM jumper	Installed
Dynamic braking	None
Internal braking transistor	No
Communication	Embedded EtherNet/IP
Local interface	Enhanced LCD / Full Numeric HIM
DC bus voltage	Approximately 540 V DC
Depth	600 mm
Height	Configuration dependent
Width	Configuration dependent
Weight (kg)	Approximately 1,270 kg
Approximate mass	1.27 metric tons
Main applications	Pumps, fans, blowers, conveyors, mining, water treatment, cement, process equipment
Installation environment	Controlled industrial electrical room / MCC

68. Final Conclusion

The 20G11BC1K4JN2NNNNN is a high-power Allen-Bradley PowerFlex 755 AC drive intended for large industrial motor-control applications.

Its core electrical specification is centered around a 400 V AC three-phase supply, 1,465 A output current, 850 kW Light Duty, 800 kW Normal Duty and 630 kW Heavy Duty ratings. It uses a Frame 9, air-cooled, 600 mm deep MCC-style configuration.

The model is particularly suitable for large pumps, fans, blowers, conveyors, cooling systems, water-treatment equipment, mining machinery, cement equipment and other major process loads.

One of its practical advantages over the JN0 configuration is the local enhanced LCD/full-numeric HIM, which can be valuable during commissioning, maintenance and troubleshooting.

The embedded EtherNet/IP interface also makes it suitable for modern plant automation, allowing the drive to communicate with PLCs and other industrial control equipment.

The approximate 1,270 kg weight should not be overlooked.

This is a very large piece of electrical equipment, and the project must consider floor loading, transportation, lifting, ventilation, cable installation, maintenance access and electrical protection before installation.

For a lower-power alternative within the same family, the 20G11BC910JN2NNNNN and 20G11BC1K2JN2NNNNN are useful candidates.

For an electrically similar configuration without the same local HIM arrangement, the 20G11BC1K4JN0NNNNN is a close comparison.

For another 1K4 configuration with a different interface arrangement, the 20G11BC1K4JN4NNNNN is also worth considering.

For applications requiring still greater capacity, the 20G11BC1K5JN2NNNNN can be evaluated.

Overall, the 20G11BC1K4JN2NNNNN is best characterized as a large-frame, high-current, air-cooled PowerFlex 755 industrial drive with embedded EtherNet/IP and local LCD/HIM capability, intended for major motor loads where centralized automation, high-power speed control and practical local maintenance access are important.