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Allen-Bradley 20G11BC1K2AN4NNNNN — Detailed Product Specifications, Introduction, Applications, Advantages and Recommended Models

1. Product Overview

The 20G11BC1K2AN4NNNNN is a high-power PowerFlex 755 AC Packaged Drive designed for large industrial motor-control systems.

It belongs to the Allen-Bradley PowerFlex 755 series and is intended for demanding applications where a large three-phase AC motor needs accurate speed control, torque control, controlled acceleration and integration with a larger industrial automation system.

This model is a 400 V AC, Frame 9, air-cooled drive with a nominal output-current rating of 1,175 A. Its published rating is approximately 800 kW for Light Duty, 710 kW for Normal Duty and 560 kW for Heavy Duty, making it a substantial high-power drive for large industrial machinery.

The AN4 configuration is particularly important because it uses the higher-protection local operator-interface arrangement. Compared with the AN2 configuration, the AN4 version is intended for an enhanced local interface arrangement with a higher enclosure protection level at the operator interface, making it more suitable where the drive may need to be operated or serviced from a less controlled industrial environment.

The drive uses an AC input with precharge, an EMC filter, and has no internal dynamic-braking transistor in this catalog configuration.

The exact 20G11BC1K2AN4NNNNN catalog number has been discontinued, with the listed discontinuation date of June 30, 2024. The identified direct replacement is 20G11BC1K2JN4NNNNN.

2. Brand and Product Series

Item	Specification
Model	20G11BC1K2AN4NNNNN
Brand	Allen-Bradley
Product family	PowerFlex
Series	PowerFlex 755
Product type	PowerFlex 755 AC Packaged Drive
Drive category	High-power AC variable frequency drive
Cooling	Air cooled
Frame	Frame 9
Voltage class	400 V AC
Rated output current	1,175 A
Light Duty rating	Approximately 800 kW
Normal Duty rating	710 kW
Heavy Duty rating	560 kW
Enclosure	IP20 / Type 1
Cabinet style	600 mm Deep MCC Style
Input configuration	AC Input with Precharge
EMC configuration	EMC Filter
Dynamic braking	None
Operator interface	AN4 configuration
Product status	Discontinued
Direct replacement	20G11BC1K2JN4NNNNN

The PowerFlex 755 family is positioned for large industrial motor applications and provides a much broader control platform than a basic compact variable-frequency drive.

The 20G11BC1K2AN4NNNNN is therefore best understood as a large industrial drive system, rather than a small standalone panel-mounted inverter.

3. Main Technical Parameters

Parameter	Specification
Model	20G11BC1K2AN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	Air-Cooled 755 AC Packaged Drive
Input voltage class	400 VAC
Nominal supply voltage	400 VAC
Typical mains range	380–480 VAC class
Input phase	Three-phase
Output phase	Three-phase
Output current	1,175 A
Light Duty	Approximately 800 kW
Normal Duty	710 kW
Heavy Duty	560 kW
Frame size	Frame 9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet style	600 mm Deep MCC Style
Input type	AC Input with Precharge
EMC filtering	EMC Filter
Dynamic braking	None
Operator interface	AN4 configuration
Mounting	Large industrial packaged configuration
Depth	600 mm
Overall dimensions	Frame 9 MCC-style configuration; exact height and width should be confirmed from the applicable mechanical drawing
Weight (kg)	Approximately 1,246 kg class
Product status	Discontinued
Replacement	20G11BC1K2JN4NNNNN

The most firmly established mechanical dimension for this configuration is the 600 mm cabinet depth. The product documentation provides dedicated standard dimension drawings and 2D/3D mechanical drawings for the active replacement configuration, so exact cabinet height and width should be taken from the final mechanical drawing rather than estimated.

For weight, a value of approximately 1,246 kg is a reasonable Frame 9 equipment-class figure for this configuration, but actual shipping weight should be confirmed against the equipment’s final mechanical and packaging documentation before transportation planning.

4. Power Rating

The drive’s power capability can be summarized as follows.

Duty Rating	Output Power
Light Duty	Approximately 800 kW
Normal Duty	710 kW
Heavy Duty	560 kW

The different duty ratings are important because industrial motors do not all experience the same torque requirements.

A large centrifugal pump normally behaves differently from a crusher.

A large fan has a different load profile from a conveyor.

A conveyor carrying heavy material may require high torque during acceleration, while a fan may operate for long periods with relatively predictable load characteristics.

For this reason, selecting the correct duty rating is more important than simply matching the drive’s kW number to the motor’s nameplate kW.

5. 1,175 A High-Current Capability

The 1,175 A output-current rating is one of the defining characteristics of this model.

This is a high-current industrial drive intended for very large AC motors.

Potential applications include:

• Large process pumps.
• Cooling-water pumps.
• Large industrial fans.
• High-capacity blowers.
• Long conveyors.
• Mining conveyors.
• Crushers.
• Cement-processing equipment.
• Large compressors.
• Material-handling machinery.
• Industrial ventilation equipment.

A current rating at this level also means that the electrical installation must be designed carefully.

The incoming supply, motor conductors, grounding, protection, cable routing, cabinet ventilation and maintenance access all become major engineering considerations.

6. 400 V AC Class

The 20G11BC1K2AN4NNNNN is designed for the 400 V AC industrial voltage class.

This voltage class is common in large industrial facilities and process plants.

The drive converts incoming AC power into controlled AC output for the motor.

The output frequency and voltage can be adjusted to control motor speed and torque.

This allows the motor to operate according to actual process requirements instead of simply running at one fixed speed.

7. Frame 9 Construction

The drive uses a Frame 9 architecture.

Frame 9 is intended for large-power drive applications and is physically much larger than compact VFDs.

The frame provides space for the power-conversion components, cooling system, control electronics, high-current connections and associated drive hardware required at this power level.

A Frame 9 drive should therefore be considered as part of a properly engineered electrical room or MCC lineup.

It is not a drive that should be selected purely on the basis of electrical specifications without considering the mechanical installation.

8. 600 mm Deep MCC-Style Cabinet

The catalog configuration is specified as a 600 mm Deep MCC Style enclosure.

The 600 mm depth is particularly relevant when designing the electrical room.

Before installation, engineers should consider:

• Cabinet depth.
• Cabinet height.
• Cabinet width.
• Front access.
• Cable entry.
• Cable bending radius.
• Maintenance space.
• Cooling airflow.
• Floor loading.
• Transportation access.
• Lifting equipment.

For a drive weighing around 1.25 metric tons, mechanical planning is not a minor detail.

9. Dimensions and Weight

The following table summarizes the mechanical information that should be used for preliminary engineering.

Mechanical Item	Specification
Model	20G11BC1K2AN4NNNNN
Frame	Frame 9
Cabinet type	MCC style
Cabinet depth	600 mm
Enclosure	IP20 / Type 1
Cooling	Air cooled
Mounting	Industrial packaged / floor-mounted arrangement
Overall height	Configuration dependent
Overall width	Configuration dependent
Overall depth	600 mm class
Weight (kg)	Approximately 1,246 kg class
Approximate metric weight	Approximately 1.25 metric tons

For a final engineering drawing, the exact height and width should be verified from the product-specific mechanical drawing.

This is especially important if the drive must fit into an existing MCC lineup or electrical room with restricted access.

The approximate 1,246 kg weight should also be treated as a planning value rather than a substitute for the final shipping weight.

10. AN4 Configuration

The AN4 portion of the catalog number distinguishes this model from similar PowerFlex 755 configurations.

The operator-interface arrangement is one of the most important practical differences between AN0, AN2 and AN4 versions.

The AN4 configuration is associated with the enhanced LCD, full-numeric local interface with IP66/NEMA 4X/12 protection at the operator interface.

This makes it especially useful where operators need local access to the drive but the local interface may be exposed to a more demanding industrial environment.

It can be useful in areas where there is:

• Dust.
• Moisture.
• Industrial contamination.
• Frequent operator interaction.
• Local maintenance activity.
• Higher enclosure-protection requirements at the interface.

The AN4 configuration therefore has a practical advantage over a basic no-HIM arrangement when local operation is an important part of the system.

11. Local Operator Interface

A local operator interface is valuable for a large industrial drive.

Maintenance technicians can use the interface to inspect operating information directly at the equipment.

Depending on system configuration, information may include:

• Output frequency.
• Motor speed.
• Output current.
• Drive status.
• Fault information.
• Alarm conditions.
• Parameter values.
• Operating commands.
• Diagnostic information.

This can make commissioning and troubleshooting considerably easier.

Instead of depending entirely on a control-room HMI or PLC screen, a technician can work directly at the drive.

12. IP66 / NEMA 4X/12 Operator Interface Advantage

The AN4 configuration is particularly interesting because of its higher-protection local interface.

This is useful when the operator interface is installed in a location where ordinary indoor operator-panel protection may not be sufficient.

Possible environments include:

• Process plants.
• Pump stations.
• Water-treatment facilities.
• Industrial production areas.
• Dust-prone process areas.
• Areas requiring frequent washdown around the surrounding equipment.

The protected interface should not be confused with turning the entire drive cabinet into an IP66/NEMA 4X enclosure.

The main drive enclosure remains an IP20 / Type 1 MCC-style configuration.

Therefore, the surrounding electrical installation still needs appropriate environmental protection.

13. EMC Filter

The model is configured with an EMC filter.

Variable frequency drives use high-speed switching power electronics.

This switching activity can create electrical interference.

The EMC filter helps control conducted interference within a correctly engineered electrical installation.

However, the final EMC performance depends on the complete system.

Engineers should consider:

• Motor cable construction.
• Cable length.
• Shielding.
• Grounding.
• Cabinet layout.
• Control wiring.
• Communication cables.
• Cable separation.
• Termination practices.

The EMC filter is therefore an important part of the design, but it is not a replacement for correct installation practices.

14. Dynamic Braking

The catalog configuration specifies no internal dynamic-braking transistor.

This is perfectly reasonable for many applications.

Large centrifugal pumps and fans, for example, may not require rapid braking.

However, some loads can require significant braking energy.

Examples include:

• High-inertia conveyors.
• Centrifuges.
• Hoists.
• Large rotating machines.
• Some material-handling equipment.

Where rapid deceleration is required, the braking requirements should be calculated from the motor speed, load inertia and required stopping time.

15. AC Input with Precharge

The drive uses an AC Input with Precharge configuration.

Precharge is important in large power-conversion systems because the DC bus contains substantial energy-storage components.

During startup, the precharge arrangement manages the initial charging process.

At this power level, the complete input system should be engineered carefully.

Important considerations include:

• Incoming circuit protection.
• Short-circuit capacity.
• Isolation.
• Grounding.
• Power quality.
• Cable sizing.
• Protective coordination.
• Maintenance access.

16. Product Introduction

The 20G11BC1K2AN4NNNNN is designed to control large industrial AC motors where variable-speed operation is required.

Its role is not simply to turn a motor on and off.

It provides a controlled interface between the industrial power system and the motor.

The drive can adjust motor speed and torque according to the production process.

This can be especially useful when a machine needs different operating speeds at different stages of production.

17. Why Large Industrial Motors Use Variable-Speed Drives

Many large motors do not need to operate continuously at maximum speed.

A process may require:

• 100% speed during peak production.
• 80% speed during normal production.
• 60% speed during reduced production.
• Controlled acceleration during startup.
• Controlled deceleration during shutdown.

A VFD allows these operating points to be managed electronically.

This can improve process flexibility and, for appropriate loads, reduce energy consumption.

18. Applications

18.1 Large Water Pumps

Large water pumps are one of the most suitable applications for this type of drive.

Possible uses include:

• Raw-water pumping.
• Water transfer.
• Cooling-water circulation.
• Industrial process water.
• Wastewater treatment.
• Water-distribution systems.
• Irrigation systems.

The drive can adjust pump speed according to pressure, flow or level requirements.

18.2 Process Pumps

Industrial process pumps often need variable flow.

The drive can adjust motor speed based on process conditions.

This may help control:

• Flow.
• Pressure.
• Tank level.
• Production rate.
• Process temperature.
• Recirculation.

A variable-speed pump can be more flexible than a fixed-speed pump controlled only by valves.

18.3 Cooling-Water Pumps

Large industrial facilities can use very large cooling-water pumps.

The drive can adjust the pump speed according to the actual cooling demand.

During periods of lower production, the pump may not need to operate at maximum speed.

During periods of high production, the speed can be increased.

19. Large Industrial Fans

Large fans are another major application.

Typical equipment includes:

• Furnace fans.
• Exhaust fans.
• Cooling fans.
• Dust-collection fans.
• Industrial ventilation fans.
• Mine ventilation systems.
• Process-air fans.

Variable-speed operation can provide better airflow control and may reduce unnecessary energy consumption.

20. Large Blowers

Large blowers can require hundreds of kilowatts.

Potential applications include:

• Wastewater aeration.
• Process air.
• Combustion air.
• Pneumatic conveying.
• Industrial drying.
• Furnace systems.

The drive can provide controlled blower speed according to actual process requirements.

21. Conveyor Systems

Large conveyors can create substantial starting torque and acceleration requirements.

A conveyor may contain:

• Long belts.
• Heavy material.
• Large rollers.
• Gearboxes.
• Couplings.
• High inertia.

A controlled acceleration profile can reduce mechanical shock.

Potential benefits include:

• Smoother starting.
• Lower belt stress.
• Reduced gearbox shock.
• Lower coupling stress.
• Improved material handling.
• Adjustable production speed.

22. Mining Industry

Mining equipment often contains some of the largest motors found in industrial facilities.

Potential applications include:

• Long conveyors.
• Crushers.
• Dewatering pumps.
• Ventilation fans.
• Material handling.
• Ore-processing equipment.

The 1,175 A current capacity makes this drive suitable for consideration in very large mining motor systems.

23. Cement Industry

Cement plants contain many large motor loads.

Possible applications include:

• Crushers.
• Large fans.
• Conveyors.
• Blowers.
• Pumps.
• Material-handling systems.
• Process ventilation.
• Grinding-related equipment.

The drive’s large current capability makes it suitable for major motor applications within this type of facility.

24. Compressor Applications

Large compressors can require high-power electric motors.

Potential applications include:

• Industrial air compressors.
• Process compressors.
• Gas-handling equipment.
• Utility compressors.
• Large refrigeration-related systems.

The exact suitability depends on the compressor’s torque characteristics, operating speed range and acceleration requirements.

25. Industrial HVAC and Ventilation

Large industrial buildings can have substantial ventilation requirements.

The drive can be used to regulate:

• Supply-air fans.
• Exhaust fans.
• Cooling fans.
• Process ventilation.
• Industrial air-handling equipment.

Variable-speed operation can provide airflow that more closely follows actual demand.

26. Advantages of the 20G11BC1K2AN4NNNNN

Feature	Advantage
1,175 A output	Suitable for very large industrial motors
800 kW LD class	High capacity for suitable variable-torque applications
710 kW ND	Strong continuous capacity for normal-duty loads
560 kW HD	Suitable for demanding loads within the applicable rating
Frame 9	Designed for large industrial installations
400 V AC	Suitable for common industrial power systems
Air cooled	Practical for properly ventilated electrical rooms
600 mm MCC style	Suitable for large electrical lineups
EMC filter	Supports controlled electrical interference
AC precharge	Appropriate for large DC-bus architecture
AN4 operator interface	Higher-protection local operator access
PowerFlex 755 platform	Suitable for sophisticated industrial motor control
High-current architecture	Suitable for major plant machinery

The biggest advantage of this model is the combination of very high motor-current capability and advanced industrial drive functionality.

It is designed for applications where the drive itself is a major part of the production system.

27. Energy Efficiency Potential

Variable-speed operation can provide significant energy benefits in the right applications.

The largest opportunities are often found in:

• Centrifugal pumps.
• Fans.
• Blowers.

For these loads, reducing speed can substantially reduce power demand.

However, actual savings depend on the complete system.

Important factors include:

• Motor efficiency.
• Pump efficiency.
• Fan efficiency.
• Operating hours.
• Process demand.
• Speed profile.
• Mechanical transmission.
• Control strategy.

Energy savings should therefore be calculated from actual plant operating conditions.

28. Process-Control Advantages

The PowerFlex 755 platform provides more than simple frequency adjustment.

A properly engineered system can use the drive for:

• Speed control.
• Torque control.
• Acceleration control.
• Deceleration control.
• Process control.
• Fault monitoring.
• Alarm monitoring.
• Remote operation.
• Diagnostic functions.
• Automation-system integration.

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

29. Automation Integration

The PowerFlex 755 family is designed for integration into larger automation systems.

This is particularly valuable in large industrial plants where many drives need to be monitored and controlled from centralized automation equipment.

A typical system may include:

PLC → Industrial Network → PowerFlex 755 → Motor → Mechanical Load

The control system can issue commands while receiving information about drive status and operating conditions.

This can simplify centralized monitoring and production management.

30. Maintenance Advantages

The local AN4 operator interface can be useful during maintenance.

Technicians can inspect drive information at the equipment itself.

Typical maintenance tasks can include:

• Checking drive status.
• Reviewing faults.
• Checking motor current.
• Verifying operating frequency.
• Inspecting parameters.
• Confirming commands.
• Testing local operation.

This can shorten troubleshooting time, particularly when the drive is located far from the central control room.

31. Cooling and Thermal Management

Because this is a high-power air-cooled drive, thermal management is important.

Power semiconductors, bus components and other electrical hardware generate heat during operation.

The electrical room should therefore provide suitable airflow.

Maintenance should include:

• Cooling fan inspection.
• Airflow inspection.
• Cabinet cleanliness.
• Ventilation checks.
• Temperature monitoring.
• Inspection for dust accumulation.

A high-power drive should not be installed in an environment where cooling airflow can become restricted.

32. Environmental Considerations

The main drive enclosure is specified as IP20 / Type 1.

This means the drive should be installed in an appropriate electrical environment rather than directly exposed to uncontrolled outdoor conditions.

Protection should be provided against:

• Direct water.
• Excessive dust.
• Corrosive contaminants.
• Severe environmental exposure.

The AN4 operator interface has a higher protection arrangement, but this does not change the environmental rating of the main drive cabinet.

33. Transportation and Installation

At approximately 1,246 kg, this is a very heavy industrial component.

The installation plan should consider:

• Floor loading.
• Door dimensions.
• Access route.
• Forklift capacity.
• Crane capacity.
• Lifting points.
• Electrical-room clearance.
• Cabinet installation position.
• Maintenance access.
• Final cable-routing arrangement.

The equipment should be treated as a roughly 1.25-ton class electrical assembly for preliminary handling planning.

34. Electrical Installation Considerations

A 1,175 A drive requires careful electrical engineering.

Important considerations include:

Incoming Power

The incoming supply must be suitable for the drive voltage and current requirements.

Protective Devices

Input protection should be properly coordinated with the installation’s fault level and protection system.

Motor Cables

Motor conductors should be sized according to current, installation method, ambient temperature and applicable electrical requirements.

Grounding

Proper grounding is essential for both safety and drive performance.

EMC

Power and control wiring should be routed correctly to reduce interference.

Short-Circuit Protection

The available fault current should be considered during system design.

Maintenance Access

The electrical room should provide enough space for safe inspection and service.

35. Motor Selection

The drive should be selected according to the actual motor current and application duty.

Motor Selection Parameter	Why It Matters
Motor voltage	Must match drive voltage class
Motor full-load current	Critical drive-sizing parameter
Motor power	Determines approximate capacity
Motor frequency	Establishes base operating point
Motor speed	Determines operating range
Motor torque	Determines load compatibility
Starting torque	Important for heavy loads
Overload requirement	Determines duty selection
Acceleration time	Affects current demand
Deceleration time	Determines braking requirements
Duty cycle	Influences thermal loading
Cable length	Affects installation and EMC
Motor insulation	Important for VFD operation

The motor should therefore not be selected solely by comparing its kW value with the drive’s kW value.

36. Recommended Same-Series Models

The following models are closely related PowerFlex 755 configurations and can be considered depending on motor current and application requirements.

Model	Series	Output Current Class	LD / ND / HD Power	Frame	Main Application	Dimensions	Weight (kg)
20G11BC910AN4NNNNN	PowerFlex 755	~910 A	~560 / 500 / 400 kW	9	Large pumps and fans	600 mm deep MCC style	~1,250
20G11BC1K0AN4NNNNN	PowerFlex 755	~1,040 A	~630 / 560 / 500 kW	9	Large industrial motors	600 mm deep MCC style	~1,250
20G11BC1K1AN4NNNNN	PowerFlex 755	~1,090 A	~710 / 630 / 500 kW	9	Pumps, fans, conveyors	600 mm deep MCC style	~1,250
20G11BC1K2JN4NNNNN	PowerFlex 755	1,175 A	800 / 710 / 560 kW	9	Direct replacement	600 mm deep MCC style	~1,246
20G11BC1K5AN4NNNNN	PowerFlex 755	~1,480 A	~900 / 850 / 710 kW	9	Very large motors	600 mm deep MCC style	Configuration dependent

The most important model in this group is 20G11BC1K2JN4NNNNN, because it is the identified direct replacement for the discontinued target model. The replacement retains the same 1,175 A, 710 kW ND and 560 kW HD class, along with the 600 mm Frame 9 architecture.

37. Direct Replacement — 20G11BC1K2JN4NNNNN

The 20G11BC1K2JN4NNNNN should be the first model considered when replacing the target drive.

Parameter	Specification
Model	20G11BC1K2JN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	Air-Cooled 755 AC Drive
Voltage	400 VAC
Output current	1,175 A
Light Duty	Approximately 800 kW
Normal Duty	710 kW
Heavy Duty	560 kW
Frame	9
Cooling	Air cooled
Input	AC with precharge
Dynamic braking	None
Size	600 mm
Depth	600 mm
Dimensions	Frame 9; exact height and width from mechanical drawing
Weight (kg)	Approximately 1,246 kg class
Lifecycle	Active

The replacement product is listed as active, while the original AN4 catalog number is discontinued.

This makes the replacement model particularly important for future procurement and modernization projects.

38. Related Model — 20G11BC1K1

The 20G11BC1K1 family is one step below the 1,175 A class.

Parameter	Specification
Model	20G11BC1K1AN4NNNNN
Series	PowerFlex 755
Voltage	400 VAC class
Output current class	Approximately 1,090 A
Light Duty	Approximately 710 kW
Normal Duty	Approximately 630 kW
Heavy Duty	Approximately 500 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm Deep MCC style
Dimensions	Frame 9; 600 mm depth
Weight (kg)	Approximately 1,250 kg class

This model is useful when the motor’s actual full-load current is below the 1,175 A requirement.

39. Related Model — 20G11BC1K0

The 20G11BC1K0 family provides another step down in capacity.

Parameter	Specification
Model	20G11BC1K0AN4NNNNN
Series	PowerFlex 755
Voltage	400 VAC class
Output current class	Approximately 1,040 A
Light Duty	Approximately 630 kW
Normal Duty	Approximately 560 kW
Heavy Duty	Approximately 500 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm Deep MCC style
Dimensions	Frame 9; 600 mm depth
Weight (kg)	Approximately 1,250 kg class

It can be considered where a 1,175 A drive would provide more capacity than necessary.

40. Related Model — 20G11BC910

The 910 A class is useful for applications with lower motor current.

Parameter	Specification
Model	20G11BC910AN4NNNNN
Series	PowerFlex 755
Voltage	400 VAC class
Output current class	Approximately 910 A
Light Duty	Approximately 560 kW
Normal Duty	Approximately 500 kW
Heavy Duty	Approximately 400 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm Deep MCC style
Dimensions	Frame 9; 600 mm depth
Weight (kg)	Approximately 1,250 kg class

This model is suitable for large motor applications where the target 1,175 A drive is oversized.

41. Related Model — 20G11BC1K5

The 20G11BC1K5 family moves in the opposite direction and provides greater capacity.

Parameter	Specification
Model	20G11BC1K5AN4NNNNN
Series	PowerFlex 755
Voltage	400 VAC class
Output current class	Approximately 1,480 A
Light Duty	Approximately 900 kW
Normal Duty	Approximately 850 kW
Heavy Duty	Approximately 710 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet	600 mm Deep MCC style
Dimensions	Frame 9; approximately 600 mm depth
Weight (kg)	Configuration dependent; approximately 1,250 kg class

This model should only be considered when the motor and load actually require the additional current capacity.

42. Five Same-Brand Popular Model Recommendations

The following models are useful for comparison across the wider Allen-Bradley PowerFlex product range.

Model	Series	Voltage Class	Current / Power Class	Frame / Size	Typical Application	Dimensions	Weight (kg)
20G11BC1K1JN0NNNNN	PowerFlex 755	400 VAC	~1,090 A / ~710 kW LD class	Frame 9	Large pumps, fans, conveyors	600 mm deep MCC	~1,250
20G11BC1K0JN0NNNNN	PowerFlex 755	400 VAC	~1,040 A class	Frame 9	Large industrial motors	600 mm deep MCC	~1,250
20G11BC910JN0NNNNN	PowerFlex 755	400 VAC	~910 A class	Frame 9	Pumps, fans and conveyors	600 mm deep MCC	~1,250
20F1ANC456JA0NNNNN	PowerFlex 753	400 VAC class	456 A class	Frame 7 class	General industrial machinery	Configuration dependent	Configuration dependent
25B-D030N114	PowerFlex 525	480 VAC class	~30 A class	Compact	Machine-level motor control	Compact	Configuration dependent

The first three are the closest alternatives because they belong to the PowerFlex 755 family.

The PowerFlex 753 is better suited to applications that do not need the full high-power architecture of the PowerFlex 755.

The PowerFlex 525 belongs to a much smaller drive class and should be considered for smaller machines rather than as a direct replacement.

43. PowerFlex 753 Alternative

The 20F1ANC456JA0NNNNN represents a lower-capacity industrial drive option.

Parameter	Specification
Model	20F1ANC456JA0NNNNN
Series	PowerFlex 753
Voltage class	400 VAC
Output current	456 A
Power class	Approximately 250 kW class
Frame	Frame 7 class
Cooling	Air cooled
Product type	Industrial AC drive
Typical application	Pumps, fans, conveyors and general machinery
Dimensions	Frame 7; configuration dependent
Weight (kg)	Configuration dependent

This drive is substantially smaller than the 20G11BC1K2AN4NNNNN and should be considered only when the motor requirements are significantly lower.

44. PowerFlex 525 Alternative

The 25B-D030N114 is a compact drive intended for a much smaller motor range.

Parameter	Specification
Model	25B-D030N114
Series	PowerFlex 525
Voltage class	480 VAC class
Current class	Approximately 30 A
Product type	Compact AC drive
Typical application	Machine-level motor control
Cooling	Air cooled
Mounting	Compact panel mounting
Dimensions	Compact frame; configuration dependent
Weight (kg)	Configuration dependent

It is not a direct replacement for the target Frame 9 drive.

It is included because it is a common smaller PowerFlex option for plants that use several drive sizes throughout different parts of the production system.

45. Comparison of Closely Related PowerFlex 755 Models

Model	Current	LD	ND	HD	Frame	Depth	Weight (kg)
20G11BC910	~910 A	~560 kW	~500 kW	~400 kW	9	600 mm	~1,250
20G11BC1K0	~1,040 A	~630 kW	~560 kW	~500 kW	9	600 mm	~1,250
20G11BC1K1	~1,090 A	~710 kW	~630 kW	~500 kW	9	600 mm	~1,250
20G11BC1K2	1,175 A	800 kW	710 kW	560 kW	9	600 mm	~1,246
20G11BC1K4	~1,465 A	~850 kW	~800 kW	~630 kW	9	600 mm	Configuration dependent
20G11BC1K5	~1,480 A	~900 kW	~850 kW	~710 kW	9	600 mm	Configuration dependent

The PowerFlex 755 rating progression shows why the 20G11BC1K2 family occupies an important position.

It provides substantially more current than the 910 A and 1,040 A classes while remaining below the larger 1,465 A and 1,480 A configurations.

46. Selection Based on Motor Current

A practical way to compare these models is by motor current.

Approximate Motor Current Requirement	Suitable PowerFlex 755 Class
Up to ~900 A	20G11BC910 class
Up to ~1,040 A	20G11BC1K0 class
Up to ~1,090 A	20G11BC1K1 class
Up to ~1,175 A	20G11BC1K2 class
Above ~1,175 A	Consider 20G11BC1K4 / 1K5 class
Significantly below 400 A	Consider smaller PowerFlex family

The actual selection should be based on the motor nameplate current, overload requirements and load profile rather than this table alone.

47. Application Matching

Application	Suitability	Reason
Large centrifugal pump	Excellent	High current and variable-speed capability
Large cooling-water pump	Excellent	Suitable for high-power continuous operation
Industrial fan	Excellent	Good fit for variable-speed airflow control
Large blower	Excellent	Suitable for high-power process-air systems
Long conveyor	Very good	High-current capability and controlled acceleration
Mining conveyor	Very good	Large motor capacity
Crusher	Application dependent	Torque and overload requirements must be checked
Compressor	Application dependent	Compressor torque profile must be evaluated
Centrifuge	Application dependent	Braking requirements need analysis
Small machine	Poor fit	Drive is physically and electrically oversized
Small pump	Poor fit	Smaller drive would be more practical

48. Commissioning Recommendations

Before commissioning the drive, the following information should be checked against the motor nameplate:

• Motor voltage.
• Motor current.
• Motor frequency.
• Motor power.
• Motor speed.
• Motor power factor.
• Motor efficiency.
• Motor connection.
• Encoder information, if applicable.

The drive should then be configured according to the actual motor and load.

A practical commissioning sequence is:

1. Confirm the catalog number.
2. Confirm incoming voltage.
3. Confirm motor nameplate data.
4. Confirm motor wiring.
5. Confirm grounding.
6. Configure motor parameters.
7. Configure control source.
8. Configure speed reference.
9. Verify minimum speed.
10. Verify maximum speed.
11. Test motor direction.
12. Perform a low-speed test.
13. Check current.
14. Check acceleration.
15. Check deceleration.
16. Verify faults and alarms.
17. Test remote control.
18. Test communication.
19. Save the final parameter set.
20. Record commissioning results.

49. Maintenance Recommendations

Because the drive is used in a high-power application, preventive maintenance is strongly recommended.

Maintenance personnel should periodically inspect:

• Cooling fans.
• Airflow.
• Cabinet cleanliness.
• Power connections.
• Grounding connections.
• Motor cable terminations.
• Control wiring.
• Communication connections.
• Operator interface.
• Fault history.
• Alarm history.
• Operating temperature.
• Drive parameters.
• Ventilation paths.

A parameter backup should also be maintained.

For critical production equipment, the final drive configuration should be documented so that replacement or troubleshooting can be performed without reconstructing the entire configuration from memory.

50. Replacement Planning

The target model is discontinued.

The listed direct replacement is 20G11BC1K2JN4NNNNN.

This is important for anyone working with existing equipment.

When replacing the old unit, the following should be checked:

Replacement Item	Check
Voltage	Confirm 400 V class
Output current	Confirm 1,175 A
LD rating	Confirm 800 kW class
ND rating	Confirm 710 kW
HD rating	Confirm 560 kW
Frame	Confirm Frame 9
Depth	Confirm 600 mm
Cabinet arrangement	Confirm MCC configuration
Cooling	Confirm air-cooled arrangement
EMC	Confirm filter arrangement
Operator interface	Confirm AN4 equivalent
Dynamic braking	Confirm none / application requirement
Communication	Confirm control-system compatibility
Mechanical dimensions	Verify final drawing
Weight	Verify actual shipping configuration

The replacement should therefore be treated as an engineering substitution rather than simply a catalog-number exchange.

51. Why the AN4 Version Is Attractive

The main practical difference between this configuration and the AN2 version is the local operator interface protection.

For installations where the operator needs to access the drive directly, AN4 can be particularly useful.

Examples include:

• Pump rooms.
• Process areas.
• Utility areas.
• Industrial production floors.
• Water-treatment installations.
• Areas where the local interface may experience dust or moisture.

The protected local interface can make the drive more practical for direct operator access while keeping the main drive in its industrial MCC-style configuration.

52. Major Advantages at a Glance

The 20G11BC1K2AN4NNNNN can be summarized through the following characteristics.

High current capacity: 1,175 A provides substantial motor-control capability.

High power capability: 710 kW Normal Duty and 560 kW Heavy Duty make it suitable for large industrial loads.

Large Frame 9 construction: Appropriate for high-power electrical installations.

400 V AC class: Suitable for common industrial motor systems.

Air cooling: Practical for appropriately ventilated electrical rooms.

600 mm MCC-style depth: Designed for integration into large industrial electrical lineups.

EMC filtering: Supports electrical-noise management.

AC precharge: Appropriate for a large DC-bus drive architecture.

AN4 local interface: Provides a higher-protection local operator interface.

PowerFlex 755 platform: Provides advanced motor-control and automation capabilities.

Broad application range: Suitable for pumps, fans, blowers, conveyors, mining equipment and other large motor-driven machinery.

53. Complete Product Specification Summary

Category	Specification
Model	20G11BC1K2AN4NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product family	PowerFlex
Product type	PowerFlex 755 AC Packaged Drive
Lifecycle	Discontinued
Direct replacement	20G11BC1K2JN4NNNNN
Voltage	400 VAC
Input phase	Three-phase
Output phase	Three-phase
Output current	1,175 A
Light Duty	Approximately 800 kW
Normal Duty	710 kW
Heavy Duty	560 kW
Frame	9
Cooling	Air cooled
Enclosure	IP20 / Type 1
Cabinet style	600 mm Deep MCC Style
Input type	AC Input with Precharge
EMC	EMC Filter
Dynamic braking	None
Operator interface	AN4 / enhanced local interface configuration
Operator interface protection	IP66 / NEMA 4X/12 class
Depth	600 mm
Overall dimensions	Frame 9 configuration; exact H × W should be confirmed from the applicable mechanical drawing
Weight (kg)	Approximately 1,246 kg class
Typical applications	Pumps, fans, blowers, conveyors, mining equipment, cement equipment, compressors
Main advantage	High-current, high-power industrial motor control
Replacement status	Direct replacement available

54. Final Conclusion

The 20G11BC1K2AN4NNNNN is a high-capacity Allen-Bradley PowerFlex 755 AC Packaged Drive designed for large industrial motor applications.

Its 1,175 A output rating, 800 kW Light Duty capability, 710 kW Normal Duty rating and 560 kW Heavy Duty rating put it firmly into the high-power industrial-drive category.

The Frame 9 construction and 600 mm Deep MCC Style configuration make it suitable for integration into large electrical rooms and industrial MCC lineups.

The air-cooled architecture provides a practical thermal-management approach for installations with suitable ventilation.

The EMC filter and AC input with precharge are important parts of the drive’s high-power electrical configuration.

The most distinctive feature of this particular catalog number is the AN4 local operator-interface configuration, which provides a higher-protection interface suitable for direct operation and maintenance in more demanding industrial environments.

This makes the AN4 configuration especially interesting for applications such as water-treatment facilities, large pump stations, process plants, industrial ventilation systems, mining installations, cement plants and other heavy industrial facilities.

The drive is particularly well suited to large pumps and fans because variable-speed operation can allow the motor to respond to actual process demand.

For conveyors and other high-inertia machinery, the high current capacity can provide substantial motor-control capability, although braking and overload requirements must be evaluated separately.

For compressors, crushers, centrifuges and similar machinery, the motor’s actual torque profile and acceleration/deceleration requirements should be checked before selecting the drive.

From a mechanical standpoint, this is also a substantial piece of equipment.

The 600 mm depth should be incorporated into the electrical-room layout, while the approximate 1,246 kg weight class means that transportation, floor loading, lifting and installation access need to be considered well before delivery.

The exact overall height and width should be taken from the final Frame 9 mechanical drawing rather than estimated from the catalog number.

The most important procurement point is that the exact 20G11BC1K2AN4NNNNN configuration is discontinued.

The identified direct replacement is 20G11BC1K2JN4NNNNN, which is listed as an active PowerFlex 755 configuration with the same 400 V class, 1,175 A, 710 kW ND, 560 kW HD and 600 mm Frame 9 rating class.

For existing installations, the original 20G11BC1K2AN4NNNNN remains an important identification number for maintenance, repair, spare-unit planning and equipment documentation.

For new installations, the replacement configuration should normally be evaluated first.

The replacement should still be checked against the existing system’s mechanical dimensions, operator interface, control architecture, communication configuration, motor parameters and installation requirements before it is treated as a final one-for-one substitution.

Overall, the 20G11BC1K2AN4NNNNN is best characterized as a large, high-current, Frame 9 industrial AC drive for demanding motor-control applications.

Its strongest points are the 1,175 A current capacity, 710 kW Normal Duty rating, 560 kW Heavy Duty rating, 800 kW Light Duty class, air-cooled construction, 600 mm MCC-style configuration, EMC filtering, precharge input and AN4 higher-protection local operator interface.

For a slightly lower motor-current requirement, the 20G11BC910, 20G11BC1K0 and 20G11BC1K1 families are logical alternatives.

For an equivalent replacement, 20G11BC1K2JN4NNNNN is the key model to evaluate.

For a higher-power application, the 20G11BC1K4 and 20G11BC1K5 classes provide a path toward greater current and power capacity.

For substantially smaller motors, PowerFlex 753 or PowerFlex 525 products may be more appropriate.

In practical industrial use, the 20G11BC1K2AN4NNNNN is not simply a variable-frequency drive for adjusting motor speed.

It is a major power-conversion component that can sit at the center of a large motor-control system.

When properly sized and installed, it can provide controlled motor operation, smoother acceleration, flexible process-speed control, centralized automation integration and a practical local maintenance interface for some of the largest motor-driven equipment found in industrial facilities.