Company Information
E-mail		[email protected]
Mobile		+8615980777398
Whatsapp		+8615980777398
WeChat		15980777398

Allen-Bradley 20G11BC1K5AN0NNNNN — PowerFlex 755 AC Drive Detailed Product Guide

Note: The information below is organized as a technical product reference based on the model designation and known PowerFlex 755 product architecture. The requested model is an older/discontinued configuration, so some mechanical data—especially exact overall cabinet dimensions and shipping/net weight—can vary by enclosure arrangement and cannot be stated responsibly without the original dimensional drawing or nameplate. I have therefore marked those fields rather than inventing a number.

1. Product Overview

Model: 20G11BC1K5AN0NNNNN

Brand: Allen-Bradley

Product Series: PowerFlex 755

Product Family: PowerFlex 750-Series AC Drives

Product Type: Air-Cooled AC Variable Frequency Drive / Variable Speed Drive

Drive Class: Architecture-Class AC Drive

Frame: Frame 9

Input: 3-phase, approximately 400 VAC class

Rated Output Current: Approximately 1,480 A

Normal-Duty Power Rating: Approximately 850 kW

Heavy-Duty Power Rating: Approximately 710 kW

Enclosure / Installation Style: IP20, 600 mm deep MCC-style construction

Cooling: Forced-air / air-cooled

Dynamic Braking: None in the specified configuration

Communication: Embedded EtherNet/IP

EMC Configuration: Filtered configuration, with the model suffix indicating the original jumper configuration

HMI: Blank configuration / no HIM supplied in the stated model

Lifecycle: The exact 20G11BC1K5AN0NNNNN configuration is an older/discontinued version of the PowerFlex 755 family. A later configuration with a closely related catalog number is available as a replacement configuration.

---

2. Understanding the Model Number

The catalog number 20G11BC1K5AN0NNNNN contains a considerable amount of configuration information.

Rather than treating it as an ordinary motor inverter, it is better to understand it as a highly configurable industrial drive platform.

The exact interpretation of every individual character should be checked against the drive’s original nameplate when replacing an installed unit because PowerFlex catalog numbers contain configuration information that affects filtering, enclosure, communications, braking, control, and other options.

---

3. Main Technical Parameters

The following table summarizes the most important technical characteristics of 20G11BC1K5AN0NNNNN.

---

4. Dimensions and Weight

Dimensions are particularly important for this model because it is not a small standalone wall-mounted inverter.

The 20G11BC1K5AN0NNNNN belongs to a very high-current Frame 9 PowerFlex 755 configuration and uses a 600 mm deep MCC-style construction.

The 600 mm figure should not be interpreted as the complete dimensions of the drive. It is associated with the cabinet/depth configuration. The complete height and width depend on the particular enclosure arrangement and configuration.

Important: For a drive rated around 1,480 A / 850 kW, the physical assembly can be considerably different from a conventional compact VFD. The actual shipping package can also include additional cabinet sections, reactors, disconnect equipment, control equipment, or other factory-installed components. For that reason, assigning a single weight in kilograms without the original mechanical drawing would be misleading.

---

5. Product Introduction

The 20G11BC1K5AN0NNNNN is a high-power member of the PowerFlex 755 AC drive family.

It is designed for demanding industrial applications where a large AC motor requires variable-speed operation, controlled acceleration and deceleration, process-speed regulation, and integration into an industrial automation system.

With an output-current class of approximately 1,480 A, this is not intended for small pumps, fans, conveyors, or machine tools. It is aimed at large industrial motors and high-power mechanical systems.

The approximately 850 kW normal-duty rating places the unit firmly in the high-power drive category. Its approximately 710 kW heavy-duty rating provides a lower power rating when the application requires greater overload capability.

The air-cooled construction uses forced ventilation to remove heat generated by the power semiconductors and other internal components.

The embedded EtherNet/IP capability is particularly useful where the drive needs to exchange operating commands, speed references, status information, diagnostic data, and other process information with a higher-level control system.

---

6. Electrical Characteristics

The drive uses a three-phase AC input architecture and belongs to the 400 VAC class.

The high-current output stage is designed for large industrial motors. At approximately 1,480 A, the drive is capable of controlling motor systems far beyond the capacity of typical compact industrial VFDs.

The difference between the normal-duty and heavy-duty ratings is important.

For applications such as pumps or fans where the motor load is relatively predictable, the higher normal-duty rating can be particularly useful.

For applications with more demanding acceleration, higher torque requirements, or frequent overload conditions, the lower heavy-duty power rating should be considered when sizing the drive.

---

7. Control and Communication

One of the important features of the PowerFlex 755 architecture is its integration capability.

The specified configuration includes embedded EtherNet/IP, allowing the drive to communicate with an industrial control system without necessarily requiring a separate basic communication adapter.

Typical information exchanged between a drive and the control system can include:

• Start and stop commands
• Speed reference
• Actual motor speed
• Output frequency
• Output current
• Drive status
• Fault information
• Warning information
• Acceleration and deceleration control
• Parameter information
• Process feedback
• Diagnostic information

This makes the drive suitable for centralized automation architectures in which multiple large motors are controlled from a common supervisory or machine-control system.

---

8. Main Applications

The 20G11BC1K5AN0NNNNN is most appropriate for large industrial motor applications.

8.1 Large Pumps

The drive can be used for large water, process, circulation, cooling, and industrial pumping systems.

Variable-speed operation allows the pump motor to respond to changing process demand instead of operating continuously at a fixed speed.

This can help improve process control and, depending on the system characteristics, reduce unnecessary energy consumption.

---

8.2 Large Fans and Blowers

Industrial ventilation, combustion-air systems, cooling systems, process-air systems, and large exhaust systems can require motors in the hundreds of kilowatts.

A high-power drive allows the fan or blower speed to be adjusted according to the actual process requirement.

---

8.3 Conveying Systems

Large mining, material-handling, bulk-material, and manufacturing conveyors can require very high motor power.

The drive can provide controlled starting and speed regulation instead of applying full line voltage directly to the motor.

This can be especially valuable for systems with high mechanical inertia.

---

8.4 Mining Equipment

High-power variable-speed drives are frequently used in demanding mining applications.

Potential applications include:

• Conveyors
• Crushers
• Material handling
• Large fans
• Pumps
• Hoisting-related equipment
• Processing machinery

The exact suitability depends on the motor, load profile, environmental conditions, braking requirements, and system design.

---

8.5 Heavy Industrial Processing

The drive can also be considered for large rotating machinery in:

• Metals processing
• Cement production
• Chemical processing
• Water treatment
• Pulp and paper
• Material processing
• General heavy manufacturing

---

9. Product Advantages

9.1 High Power Capacity

One of the biggest advantages is the very high current capacity.

With an output-current class of approximately 1,480 A, the unit can control large industrial motors that are far outside the range of ordinary low-power drives.

---

9.2 High Motor Power Rating

The approximately 850 kW normal-duty rating makes it suitable for large-scale industrial equipment.

The approximately 710 kW heavy-duty rating provides another sizing reference for applications where more demanding operating conditions are expected.

---

9.3 Integrated Industrial Networking

The embedded EtherNet/IP capability simplifies integration with industrial control architectures.

Instead of treating the drive as an isolated power-control device, it can become part of a broader automation system.

---

9.4 Flexible Application Architecture

The PowerFlex 755 platform was designed as a configurable architecture-class drive.

This allows the same general product family to cover a wide range of motor-control requirements through different current ratings, voltage classes, options, feedback arrangements, communications, and other configurations.

---

9.5 Suitable for Large Industrial Loads

The Frame 9 configuration is intended for applications where motor power and current are substantial.

This makes it a better fit for heavy industrial machinery than small general-purpose VFD families.

---

9.6 Air-Cooled Construction

Air cooling avoids the complexity of liquid cooling for many installations.

However, because of the very high power level, the ventilation system must be designed properly and the surrounding cabinet/environment must provide adequate airflow and heat dissipation.

---

9.7 Industrial Control Integration

The PowerFlex 755 architecture is well suited to applications where the drive must interact continuously with PLC, DCS, SCADA, or other industrial automation equipment.

This can simplify centralized monitoring and operational management.

---

10. Limitations and Points to Consider

The drive is powerful, but its size and electrical rating also introduce several considerations.

Physical Size

This is a large industrial drive rather than a compact inverter.

The 600 mm deep MCC-style construction means the installation needs suitable cabinet or MCC space.

Heat Dissipation

An approximately 850 kW-class drive can generate significant heat.

Ventilation, cabinet temperature, airflow, and clearance must therefore be carefully considered.

Electrical Infrastructure

A drive operating around 1,480 A requires substantial upstream electrical infrastructure.

The transformer, incoming switchgear, protection system, cabling/busbar system, grounding arrangement, and motor connection all need to be appropriately engineered.

Motor Compatibility

The motor must be correctly matched to the drive’s voltage, current, power, insulation system, speed range, and operating profile.

Braking

The specified configuration has no dynamic braking.

If the application has rapid deceleration, high inertia, or regenerative energy, an appropriate braking or regeneration strategy may be necessary.

---

11. Five Same-Series Recommended Models

The following models belong to the PowerFlex 755 family and are closely related to the requested unit.

Mechanical Parameters for the Same-Series Models

Among these, 20G11BC1K4AN0NNNNN is especially close to the requested model because its current and power class are very similar.

For a higher-power application, 20G11BC1K6AN0NNNNN provides additional current capacity.

---

12. Five Same-Brand Popular / Commonly Encountered Models

The following are representative Allen-Bradley models from other PowerFlex families and are useful when comparing drive sizes and application ranges.

The first three are particularly useful when the requirement remains in the high-power PowerFlex 755 range.

The PowerFlex 753 models are more appropriate when the application does not require the very high power and advanced architecture of the largest PowerFlex 755 installations.

---

13. Comparison: Target Model vs. Closest Alternatives

---

14. Why Choose the 20G11BC1K5AN0NNNNN?

For an existing system designed around approximately 1,480 A, the original model is a very specific high-power solution.

Its main strengths are its combination of:

• High current capacity
• High motor-power capability
• 400 VAC class operation
• Three-phase industrial architecture
• EtherNet/IP integration
• PowerFlex 755 platform compatibility
• Large industrial motor control
• Air-cooled construction
• MCC-style installation
• Flexible automation integration

The model is particularly attractive when an existing facility already uses the PowerFlex 755 architecture and needs to maintain consistency in drive control, communication, spare parts, parameter management, and maintenance practices.

---

15. Replacement Consideration

A particularly important point for anyone purchasing or replacing this model is that the exact catalog number 20G11BC1K5AN0NNNNN is an older configuration.

A closely related later model is:

20G11BC1K5JN0NNNNN

This model remains within the PowerFlex 755 family and has a very similar high-power electrical rating.

Its commonly specified characteristics include:

Although this is a very close successor configuration, it should not be treated as a simple one-for-one substitution without checking the complete electrical, mechanical, control, communication, braking, filtering, and installation requirements.

---

16. Application Selection Guide

---

17. Selection Recommendations

If the application requires approximately 1,480 A and 850 kW normal-duty capacity, the 20G11BC1K5 configuration is the closest match.

If the application requires slightly less current, a 20G11BC1K1 or 20G11BC1K4 configuration may be considered depending on the exact motor rating and duty cycle.

If additional current and power margin are required, 20G11BC1K6 becomes a more appropriate candidate.

For substantially smaller motors, moving to a lower-current PowerFlex 755 configuration or a PowerFlex 753 configuration can reduce physical size and overall system cost.

---

18. Advantages of Staying Within the Same Series

Using another PowerFlex 755 model instead of changing to a completely different drive family can provide several practical advantages.

Control Architecture Consistency

Existing engineers and maintenance personnel may already be familiar with the PowerFlex 755 operating philosophy.

Parameter Management

A common drive family can simplify parameter backup, commissioning, troubleshooting, and replacement.

Communication Architecture

Existing industrial Ethernet-based communication structures can be easier to maintain when the replacement remains within the same drive family.

Spare Parts Management

Keeping similar drives in the same facility can reduce the number of different product families that maintenance personnel need to support.

Training

Technicians can apply existing knowledge of PowerFlex 755 configuration and troubleshooting to additional installations.

---

19. Key Technical Summary

---

20. Final Assessment

The 20G11BC1K5AN0NNNNN is a very high-power PowerFlex 755 AC drive designed for large three-phase industrial motors.

Its approximately 1,480 A output-current capability, 850 kW normal-duty rating, 710 kW heavy-duty rating, Frame 9 construction, IP20 protection, 600 mm MCC-style depth, and embedded EtherNet/IP make it particularly suitable for large pumps, fans, conveyors, process machinery, mining equipment, and other heavy industrial applications.

The main advantage of this model is not compactness or low-power flexibility. Its strength is the ability to provide sophisticated variable-speed control for very large industrial motor systems while remaining part of a broader industrial automation architecture.

For replacement purposes, the most logical candidates are other PowerFlex 755 configurations with comparable voltage, current, power, frame, filtering, communication, and enclosure characteristics. Among the models discussed above, 20G11BC1K4AN0NNNNN, 20G11BC1K5JN0NNNNN, and 20G11BC1K6AN0NNNNN deserve particular attention because they are electrically close to the target model.

One important purchasing point is that the exact physical dimensions and weight in kilograms should not be estimated from the catalog number alone. For a drive of this size, the final mechanical configuration can materially affect width, height, shipping weight, and installation requirements. The safest specification is therefore to confirm the original nameplate and dimensional drawing before preparing a replacement, cabinet, transportation, or installation plan.