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Allen-Bradley 20G11BC1K0AN2NNNNN — Detailed Product Specifications, Product Introduction, Applications, Advantages and Related Model Recommendations

1. Product Overview

The 20G11BC1K0AN2NNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control applications.

It is an air-cooled, three-phase AC drive with a 400 VAC input class, a 1,040 A output-current rating, and a Frame 9 mechanical configuration.

The drive provides a very large power capacity, with approximately 630 kW Low Duty, 560 kW Normal Duty and 500 kW Heavy Duty ratings. This places it firmly in the large industrial-drive category and makes it suitable for major pumps, fans, conveyors, compressors, process equipment, mining machinery and other large rotating machines.

The model uses a 600 mm deep MCC-style cabinet configuration, with IP20 / NEMA Type 1 protection, forced-air cooling, EMC filtering and an AC input with precharge and DC terminals.

A particularly important feature of this exact catalog number is the N2 configuration. The drive does not use an internal dynamic-braking transistor, while the 2 configuration specifies an enhanced LCD, full-numeric, door-mounted HIM with IP20/NEMA Type 1 protection.

This makes the 20G11BC1K0AN2NNNNN different from a visually similar model ending in N0, because the operator-interface configuration is different.

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2. Brand and Product Series

Item	Specification
Brand	Allen-Bradley
Product family	PowerFlex
Product series	PowerFlex 755
Product type	High-Power AC Variable Frequency Drive
Catalog number	20G11BC1K0AN2NNNNN
Drive type	Air-Cooled AC Drive
Input voltage class	400 VAC
Input phase	Three-phase
Output current	1,040 A
Low Duty rating	630 kW
Normal Duty rating	560 kW
Heavy Duty rating	500 kW
Frame	Frame 9
Enclosure	IP20 / NEMA Type 1
Cabinet type	600 mm deep MCC style
Cooling	Forced air
Input configuration	AC input with precharge
DC terminals	Included
Filtering	EMC filter
CM capacitor jumper	Removed
Dynamic braking	No internal dynamic-braking transistor
Operator interface	Enhanced LCD, full numeric, door-mounted HIM
HIM protection	IP20 / NEMA Type 1
Communication	Industrial network capable
Main application	Large industrial motor control

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3. Main Technical Parameters

Parameter	Specification
Model	20G11BC1K0AN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product category	Industrial AC Variable Frequency Drive
Input voltage	400 VAC
Input phase	3 phase
Output phase	3 phase
Output current	1,040 A
Low Duty power	630 kW
Normal Duty power	560 kW
Heavy Duty power	500 kW
Frame size	Frame 9
Cooling	Air cooled / forced air
Input type	AC input with precharge
DC terminals	Yes
Enclosure type	IP20 / NEMA Type 1
Cabinet style	MCC style
Cabinet depth	600 mm
Filtering	EMC filter
CM jumper	Removed
Dynamic braking	No internal transistor
HIM	Door-mounted enhanced LCD, full numeric
HIM enclosure rating	IP20 / NEMA Type 1
Control architecture	PowerFlex 755
Installation	MCC / electrical cabinet
Approx. dimensions H × W × D	2453 × 1200 × 600 mm
Weight (kg)	Approximately 1,246 kg

The dimensions and weight above correspond to the Frame 9, IP20/NEMA Type 1, MCC-style 600 mm-deep configuration.

For an actual installation, the overall lineup dimensions can be larger when additional option cabinets, wiring compartments, input equipment, reactors, disconnect equipment or other accessories are included.

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4. Catalog Number Interpretation

The catalog number 20G11BC1K0AN2NNNNN contains several important configuration details.

Catalog Number Section	General Configuration
20G	PowerFlex 750-series drive identification
11	PowerFlex 755 AC drive
B	400 VAC class
C	Air-cooled packaged configuration
1K0	1,040 A current class
A	EMC filtering with CM jumper removed
N	No internal dynamic-braking transistor
2	Door-mounted enhanced LCD/full-numeric HIM, IP20/NEMA Type 1
NNNNN	No additional selected configuration in the remaining positions

The 1K0 portion is especially significant because it identifies the 1,040 A current class.

The A filtering code indicates filtering with the common-mode capacitor jumper removed.

The N dynamic-braking code means there is no internal dynamic-braking transistor.

The 2 operator-interface code is also important. It identifies the enhanced LCD/full-numeric door-mounted HIM configuration.

Therefore, this is not simply a 1,040 A PowerFlex 755. It is a specific high-power cabinet configuration with a particular filtering arrangement, braking arrangement and operator interface.

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5. Electrical Rating

The 20G11BC1K0AN2NNNNN is designed for very large three-phase motors.

Its principal duty ratings are:

Duty Classification	Power Rating
Low Duty	630 kW
Normal Duty	560 kW
Heavy Duty	500 kW
Output current	1,040 A

The 560 kW Normal Duty rating is one of the most useful reference points when evaluating this drive for continuous industrial operation.

The 500 kW Heavy Duty rating is important for machines that require greater torque or more demanding overload capability.

The Low Duty rating provides a higher power figure for applications with less demanding overload requirements.

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6. What Makes the 1,040 A Rating Important

The 1,040 A output rating places this drive at the high-power end of the conventional industrial AC-drive range.

A drive of this size is normally used with large motors rather than small machine motors.

Typical motor sizes can reach several hundred kilowatts, depending on the motor voltage, motor current, duty cycle and application characteristics.

The actual motor should always be selected according to its nameplate current and operating conditions.

For a large motor, the current rating is generally more important than simply comparing kW numbers.

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7. 400 VAC Three-Phase Design

The 20G11BC1K0AN2NNNNN is configured for a 400 VAC three-phase industrial power system.

This voltage class is widely used in industrial facilities.

For large motors, a 400 VAC system can result in very high current levels, which explains the substantial 1,040 A output capacity of the drive.

At this power level, the installation requires careful attention to:

• Incoming power distribution.
• Protective devices.
• Motor cable sizing.
• Grounding.
• EMC considerations.
• Cabinet ventilation.
• Thermal management.
• Cable termination.
• Short-circuit protection.
• Maintenance access.

The drive should therefore be regarded as part of a complete high-power electrical system rather than as an isolated electronic component.

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8. Product Introduction

The main purpose of the 20G11BC1K0AN2NNNNN is to provide controlled variable-speed operation for large three-phase AC motors.

A conventional fixed-speed motor connected directly to an AC supply normally operates close to a fixed speed determined by supply frequency and motor characteristics.

A variable frequency drive changes the electrical frequency and voltage supplied to the motor.

This allows the motor to operate at different speeds according to the machine’s actual requirements.

For a pump, this can mean adjusting flow and pressure.

For a fan, it can mean controlling airflow.

For a conveyor, it can mean controlling production speed and acceleration.

For a compressor, it can mean adjusting output according to demand.

For process machinery, it can mean synchronizing motor speed with other production variables.

At a power level of several hundred kilowatts, these capabilities can have a major impact on overall plant operation.

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9. High-Power Frame 9 Architecture

The drive uses a Frame 9 architecture.

Frame 9 is designed for very high-power applications and requires considerably more installation space than smaller PowerFlex drive frames.

For the IP20/NEMA Type 1 MCC-style configuration, the approximate dimensions are:

2453 mm high × 1200 mm wide × 600 mm deep

The approximate weight is:

1,246 kg

This is substantial equipment.

Transportation, lifting, floor loading, cabinet positioning and service access should all be considered during project planning.

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10. Dimensions and Weight

Mechanical Parameter	Specification
Frame	Frame 9
Enclosure	IP20 / NEMA Type 1
Cabinet style	MCC style
Height	Approximately 2453 mm
Width	Approximately 1200 mm
Depth	600 mm
Dimensions H × W × D	2453 × 1200 × 600 mm
Weight (kg)	Approximately 1,246 kg
Cooling	Forced air
Installation	Floor-mounted MCC / electrical cabinet
Cabinet depth option	600 mm for this configuration

The approximately 1,246 kg value is a cabinet-level Frame 9 reference weight.

If the system includes additional option cabinets or other equipment, the complete lineup can be considerably heavier.

For transportation, the final configured equipment weight should be confirmed before lifting or installation.

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11. Enclosure and Protection

The drive is configured as IP20 / NEMA Type 1.

This type of enclosure is intended for installation in a suitable industrial electrical environment.

It is not designed to be treated as an outdoor weatherproof enclosure.

The installation area should be protected from:

• Direct water exposure.
• Excessive moisture.
• Conductive dust.
• Corrosive chemicals.
• Oil contamination.
• Excessive vibration.
• Foreign objects.
• Excessive ambient temperature.

A suitable electrical room or enclosure environment is therefore recommended.

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12. Air-Cooled Construction

The drive uses forced-air cooling.

At 1,040 A and several hundred kilowatts of motor power, the amount of heat generated by the power electronics is significant.

The cooling system must maintain the internal components within their allowable operating temperature.

A suitable installation should provide:

• Adequate airflow.
• Correct ventilation.
• Clean cooling air.
• Proper filter maintenance where applicable.
• Sufficient clearance.
• Appropriate cabinet ventilation.
• Correct ambient temperature.
• Consideration of installation altitude.

Cooling should not be treated as a secondary issue for a drive of this size.

Poor thermal management can shorten component life and may cause unnecessary drive trips.

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13. EMC Filtering

The 20G11BC1K0AN2NNNNN includes an EMC filter.

The purpose of EMC filtering is to reduce conducted electromagnetic interference generated by the switching operation of the power electronics.

This is particularly useful in industrial facilities containing:

• PLC systems.
• Sensors.
• Communication equipment.
• Instrumentation.
• Measurement equipment.
• Other variable frequency drives.
• Industrial computers.
• Control networks.

The filter does not eliminate the need for correct cable routing and grounding.

Motor cables, control cables and communication cables should still be installed according to appropriate industrial wiring practices.

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14. CM Jumper Removed

The catalog number uses the A filtering configuration, which corresponds to the common-mode capacitor jumper being removed.

This is an important electrical configuration detail.

The common-mode configuration can influence how the drive interacts with the plant grounding system.

For that reason, an apparently similar PowerFlex 755 model should not automatically be considered an electrical equivalent.

When replacing an existing drive, the filtering and grounding configuration should be checked carefully.

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15. Dynamic Braking Configuration

The N braking configuration indicates that the drive does not contain an internal dynamic-braking transistor.

This is particularly important for high-inertia loads.

When a large motor decelerates, energy can flow from the motor back into the drive’s DC bus.

If the deceleration is sufficiently rapid, the DC-bus voltage can rise significantly.

Depending on the application, the system may require:

• External braking equipment.
• Regenerative equipment.
• Longer deceleration times.
• Mechanical braking.
• A dedicated energy-management arrangement.

For applications with relatively slow acceleration and deceleration, this may not be a major concern.

For applications with frequent rapid stopping, it should be evaluated during the initial drive-selection process.

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16. Door-Mounted HIM

One of the key differences between the 20G11BC1K0AN2NNNNN and the corresponding N0 configuration is the operator interface.

The 2 configuration specifies an enhanced LCD, full-numeric, door-mounted HIM with IP20/NEMA Type 1 protection.

This provides an operator interface mounted on the cabinet door rather than requiring the operator to access the drive’s internal electronics.

This is particularly useful in large MCC installations.

An operator can use the interface to perform tasks such as:

• Viewing drive status.
• Checking operating values.
• Viewing faults.
• Reviewing alarms.
• Adjusting parameters.
• Starting or stopping equipment where permitted.
• Checking motor speed.
• Checking output frequency.
• Checking current.
• Performing basic diagnostic work.

For a large industrial drive, a door-mounted interface is a practical feature because the main power equipment may be located in a restricted electrical area.

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17. Embedded Control and Networking

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

This makes the drive suitable for large installations where multiple motors need to be coordinated.

Typical control information can include:

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

This type of integration is especially valuable in centralized industrial control systems.

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18. Product Advantages

18.1 Very High Power Capacity

The largest advantage of the 20G11BC1K0AN2NNNNN is its high power rating.

With a 560 kW Normal Duty rating and 500 kW Heavy Duty rating, it is designed for very large motor applications.

This allows one drive platform to handle equipment that would otherwise require substantially different motor-control arrangements.

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18.2 High Current Capability

The 1,040 A output rating gives the drive substantial current capacity.

This is suitable for large motors with high full-load current.

The current rating also provides flexibility when dealing with machines with significant starting or operating torque requirements.

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18.3 Advanced Operator Interface

The door-mounted enhanced LCD/full-numeric HIM is a useful advantage for operators and maintenance personnel.

It allows important drive information to be viewed without opening the main electrical cabinet.

This can simplify routine troubleshooting and operational checks.

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18.4 Large Industrial Cabinet Design

The Frame 9 MCC-style design is suitable for large industrial electrical installations.

The equipment is physically designed for applications where substantial electrical power must be handled.

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18.5 EMC Filtering

The integrated EMC filter helps improve electromagnetic compatibility within the overall installation.

This can be particularly useful in facilities containing sensitive instrumentation and communication systems.

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18.6 Flexible Industrial Applications

The drive can be applied to many different types of large rotating machinery.

Its application range includes:

• Pumps.
• Fans.
• Blowers.
• Conveyors.
• Compressors.
• Process machinery.
• Material-handling equipment.
• Mining machinery.
• Heavy industrial production systems.

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19. Typical Applications

19.1 Large Water Pumps

Large water pumps are one of the most natural applications for a high-power variable frequency drive.

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

Potential applications include:

• Water-transfer systems.
• Industrial cooling-water pumps.
• Water-treatment facilities.
• Process-water systems.
• Large circulation pumps.
• Municipal pumping systems.
• Industrial pressure systems.

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19.2 Large Fans

Industrial fans can consume substantial amounts of electrical power.

A variable frequency drive allows fan speed to follow actual airflow demand.

Typical applications include:

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

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19.3 Large Conveyors

Large conveyors often require controlled acceleration and deceleration.

The drive can gradually increase motor speed instead of applying the full load immediately.

This can reduce mechanical stress on:

• Conveyor belts.
• Gearboxes.
• Couplings.
• Bearings.
• Shafts.
• Rollers.

For conveyors with heavy loads and rapid stopping requirements, braking and regeneration should receive special attention.

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19.4 Compressors

Large industrial compressors may benefit from variable-speed operation.

The drive can adjust motor speed according to process demand.

Potential benefits include:

• Better process matching.
• Reduced unnecessary operation.
• Improved pressure control.
• Smoother motor operation.
• Reduced mechanical stress.

The final suitability depends on the compressor type and its torque characteristics.

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19.5 Mining Equipment

Mining equipment often contains very large motors.

Potential applications include:

• Long conveyors.
• Crushers.
• Large fans.
• Pumps.
• Material-handling systems.

The high current capacity of the 20G11BC1K0AN2NNNNN makes it suitable for many large mining applications, although environmental and safety requirements must be considered separately.

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19.6 Cement and Heavy Industry

Cement production and other heavy industrial processes frequently use large motors.

Potential applications include:

• Kiln fans.
• Exhaust fans.
• Crushers.
• Conveyors.
• Large pumps.
• Material-handling equipment.
• Process blowers.

The drive’s high power rating provides considerable capacity for this type of machinery.

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20. Application Suitability Table

Application	Suitability	Main Reason
Large water pump	Excellent	High power and variable-speed control
Process pump	Excellent	Good process-control capability
Large fan	Excellent	High-power variable-speed operation
Large blower	Excellent	High current and power capacity
Conveyor	Excellent	Controlled acceleration and speed
Mining conveyor	Excellent	Suitable for large motors
Crusher	Very Good	High-power motor control
Compressor	Very Good	Suitable depending on load characteristics
Cement equipment	Very Good	Designed for large industrial motors
Cooling-tower fan	Excellent	Variable-speed airflow control
Large HVAC pump	Excellent	Efficient speed regulation
Hoist	Requires detailed evaluation	Braking and safety requirements
Crane	Requires detailed evaluation	Regeneration and braking
Small machine	Not recommended	Drive is substantially oversized

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21. Five Recommended Models from the Same Series

The following models are useful comparisons within the PowerFlex 755 family.

Model	Series	Voltage	Output Current	Power Rating	Frame	Dimensions / Weight
20G11BC910AN2NNNNN	PowerFlex 755	400 VAC	910 A	Approx. 500 kW ND / 400 kW HD class	Frame 9	Approx. 2453 × 1200 × 600 mm; approx. 1246 kg
20G11BC1K0JN2NNNNN	PowerFlex 755	400 VAC	1,040 A	Approx. 560 kW ND / 500 kW HD	Frame 9	Approx. 2453 × 1200 × 600 mm; approx. 1246 kg
20G11BC1K1JN2NNNNN	PowerFlex 755	400 VAC	1,110 A class	Higher-power Frame 9 configuration	Frame 9	Approx. Frame 9 MCC dimensions; weight configuration dependent
20G11BC1K2AN2NNNNN	PowerFlex 755	400 VAC	1,200 A class	Higher-power Frame 9 configuration	Frame 9	Approx. Frame 9 MCC dimensions; weight configuration dependent
20G11BC1K4JN2NNNNN	PowerFlex 755	400 VAC	1,400 A class	Very-high-power Frame 9/large-drive application	Frame 9	Large MCC-style cabinet; weight configuration dependent

The 20G11BC910AN2NNNNN is a useful lower-current alternative when the motor does not require the full 1,040 A capacity.

The 20G11BC1K0JN2NNNNN is particularly close to the subject model because it maintains the same basic current and power class while changing the filtering/CM-capacitor configuration.

The higher-current models are more appropriate when the motor load is beyond the 1,040 A class.

For all large Frame 9 configurations, the final physical dimensions and weight should be checked against the complete cabinet configuration because additional option sections can substantially increase the overall size and mass.

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22. Five Recommended Popular Models from the Same Brand

Model	Series	Typical Voltage	Current / Power	Main Application	Dimensions / Weight
20F1ANF263JN0NNNNN	PowerFlex 753	690 VAC	263 A / 250 kW ND / 200 kW HD	Large industrial motor control	Approx. 881.5 × 430 × 349.6 mm; approx. 48 kg
20G11BC910JN2NNNNN	PowerFlex 755	400 VAC	910 A / approx. 500 kW ND class	Large industrial motor control	Frame 9 MCC style; approx. 2453 × 1200 × 600 mm class
20G11BF590JN0NNNNN	PowerFlex 755	690 VAC	590 A class / approx. 560 kW ND class	High-voltage large motor control	Frame 9; configuration dependent
25B-D030N114	PowerFlex 525	480 VAC class	Approx. 30 A class	Compact industrial machinery	Compact frame; configuration dependent
20G1AND248AN0NNNNN	PowerFlex 755	480 VAC class	248 A / approx. 150 kW class	General industrial motor control	Frame dependent; approximately 46 kg class

These five models represent different areas of the product range.

The PowerFlex 753 is useful for high-power general industrial applications.

The PowerFlex 755 models are better suited to advanced industrial systems and larger motor installations.

The PowerFlex 525 is considerably smaller and is more appropriate for compact machines.

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23. PowerFlex 755 vs PowerFlex 753

Feature	PowerFlex 753	PowerFlex 755
Product positioning	Industrial AC drive	Advanced industrial AC drive
Large motor applications	Yes	Yes
High-power Frame 9	Limited	Yes
Embedded I/O	Yes	Yes
Industrial networking	Available	Extensive
Advanced control	Good	Excellent
Motion-related functions	More limited	More extensive
Cabinet configurations	Available	Extensive
Large MCC applications	Limited	Strong
Typical applications	Pumps, fans, conveyors	Large pumps, conveyors, process and advanced machinery
Best use	General industrial control	High-performance and complex industrial systems

The 20G11BC1K0AN2NNNNN belongs to the PowerFlex 755 family, making it particularly suitable when the project requires a high-power industrial drive with more advanced control and integration capability.

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24. Operator Interface Advantages

The door-mounted HIM configuration is especially useful in large installations.

A Frame 9 drive can be installed inside a dedicated electrical room where direct access to the internal drive assembly is inconvenient or restricted.

With the door-mounted HIM, operators and maintenance personnel can access important information from the cabinet front.

Typical information includes:

• Drive operating status.
• Motor speed.
• Output frequency.
• Current.
• Fault status.
• Alarm status.
• Parameter information.
• Diagnostic information.

This can reduce the need to open the electrical cabinet during routine inspection.

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25. Maintenance Advantages

Large industrial drives represent a significant investment.

Maintenance personnel therefore benefit from clear operating information and diagnostic capability.

The 20G11BC1K0AN2NNNNN can support maintenance activities by providing information about the drive’s operating state.

Potential benefits include:

• Faster troubleshooting.
• Easier fault identification.
• Better visibility of operating conditions.
• Reduced diagnostic time.
• Easier operator access.
• More organized maintenance procedures.

For a large plant, these benefits can be important because a failed high-power drive can affect a major part of the production process.

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26. Energy-Saving Potential

A variable frequency drive can provide significant energy-management benefits in variable-torque applications.

Pumps and fans are particularly suitable.

If the process requires less output, the motor can run at a lower speed instead of continuously operating at full speed.

This can reduce unnecessary energy consumption.

Potential benefits include:

• Reduced motor speed.
• Reduced throttling losses.
• Better process matching.
• Reduced mechanical stress.
• Improved system flexibility.

Actual energy savings depend on the load profile and operating hours.

The presence of a VFD does not automatically guarantee a particular percentage of energy savings.

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27. Large Pump Application Example

Consider a large industrial pump that does not always need maximum flow.

A fixed-speed motor may continuously operate near full speed while a valve is used to reduce flow.

With a variable frequency drive, the motor speed can instead be adjusted to the required flow.

The drive can therefore respond to changing process demand.

A typical operating sequence may be:

1. The process requires a certain flow.
2. A sensor measures the process condition.
3. The control system compares the actual value with the desired value.
4. The drive receives a speed command.
5. Motor speed increases or decreases.
6. Pump output changes.
7. The process approaches the desired operating point.

This is one of the reasons variable-speed drives are widely used in large pumping systems.

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28. Large Fan Application Example

Large fans frequently operate at different airflow requirements throughout the day.

The 20G11BC1K0AN2NNNNN can adjust the motor speed according to the actual airflow requirement.

This can be useful for:

• Factory ventilation.
• Furnace exhaust.
• Mine ventilation.
• Industrial cooling.
• Process-air systems.
• Dust removal.

The ability to reduce fan speed when full airflow is not needed can also provide significant energy-management advantages.

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29. Conveyor Application Example

Large conveyors can experience substantial mechanical stress when starting.

A variable frequency drive can provide controlled acceleration.

Instead of immediately applying the full motor speed, the drive can gradually ramp the motor up.

This can reduce sudden forces on the mechanical transmission.

Potential benefits include:

• Reduced belt shock.
• Reduced gearbox stress.
• Reduced coupling stress.
• Smoother material movement.
• Adjustable production speed.
• Better coordination between conveyor sections.

For conveyors with very large inertia, deceleration and regenerative energy should be analyzed separately.

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30. Heavy-Duty Application Considerations

The Heavy Duty rating of this drive is approximately 500 kW.

This rating should be used when the machine requires a more demanding torque or overload profile.

Examples can include:

• Heavy conveyors.
• Crushers.
• Certain mixers.
• Heavy process machinery.
• Material-handling equipment.

The correct rating depends on the actual motor current and load characteristics.

A 500 kW motor does not automatically mean that the drive should be operated at its Heavy Duty limit.

The motor nameplate and machine torque profile should always be reviewed.

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31. Normal Duty Application Considerations

The Normal Duty rating is approximately 560 kW.

This rating is particularly relevant to applications with relatively stable load characteristics.

Typical examples include:

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

For these applications, the motor can often operate continuously without the same overload demands experienced by highly dynamic machinery.

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32. Low Duty Application Considerations

The Low Duty rating reaches approximately 630 kW.

Low Duty applications generally have less demanding overload requirements.

This higher power figure should not be interpreted as meaning that every 630 kW motor can be connected to the drive.

The actual motor current, duty cycle and load characteristics must still remain within the applicable drive limits.

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33. Installation Requirements

A drive of this size requires careful installation planning.

Important considerations include:

Installation Item	Recommended Consideration
Cabinet space	Provide sufficient room for the complete Frame 9 system
Floor loading	Check the approximately 1,246 kg equipment weight
Lifting	Plan appropriate lifting and positioning equipment
Ventilation	Provide adequate forced-air circulation
Power cables	Select suitable high-current cables
Motor cables	Correctly size and route motor conductors
Grounding	Provide appropriate protective grounding
EMC	Maintain correct cable separation and grounding
Service access	Allow room for maintenance
Heat dissipation	Consider total cabinet heat
Ambient conditions	Keep within the applicable operating range
Braking	Evaluate regeneration requirements
Operator access	Provide safe access to the door-mounted HIM

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34. Motor Selection

The drive should be matched to the motor using several parameters.

Motor Parameter	Importance
Motor voltage	Must be compatible with the drive system
Rated current	Critical for drive sizing
Motor power	Must fit the selected duty
Frequency	Must be compatible with the motor
Speed	Determines required speed-control range
Torque	Determines load suitability
Starting requirement	Important for heavy loads
Overload requirement	Important for Heavy Duty selection
Regenerative behavior	Important for braking
Cable length	May influence output filtering and EMC
Motor insulation	Important for VFD operation
Duty cycle	Determines thermal requirements

The actual motor nameplate current should be compared with the drive’s 1,040 A rating before final selection.

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35. Braking and Regenerative Energy

The absence of an internal dynamic-braking transistor is especially important for high-inertia machines.

Consider a large conveyor carrying a heavy material load.

When the conveyor is commanded to stop, the motor and mechanical system may continue rotating.

The mechanical energy can return through the motor into the drive.

If the drive cannot dissipate or transfer this energy appropriately, DC-bus voltage can rise.

Possible solutions include:

• Longer deceleration time.
• External braking system.
• Regenerative drive system.
• Mechanical braking.
• Process-control strategies that reduce regenerative energy.

The correct solution depends on the machine.

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36. Physical Installation Planning

The approximate physical dimensions of the subject configuration are:

2453 mm × 1200 mm × 600 mm

This is a very large cabinet.

The equipment also weighs approximately:

1,246 kg

Therefore, installation planning should begin before the equipment arrives.

The project should consider:

• Doorway dimensions.
• Transportation route.
• Floor strength.
• Lifting points.
• Crane or lifting equipment.
• Electrical-room clearance.
• Service access.
• Cable-entry locations.
• Ventilation.
• Adjacent cabinet spacing.

A drive can have excellent electrical characteristics and still become difficult to install if the mechanical requirements are ignored.

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37. Main Advantages at a Glance

Advantage	Practical Benefit
1,040 A output	Handles very large motor currents
560 kW Normal Duty	Suitable for large continuous industrial loads
500 kW Heavy Duty	Suitable for demanding applications
630 kW Low Duty	High capacity for less demanding loads
400 VAC	Suitable for industrial three-phase systems
Frame 9	Designed for very high-power applications
MCC-style cabinet	Good fit for centralized electrical installations
EMC filter	Helps manage conducted interference
CM jumper removed	Defined grounding/filter configuration
Door-mounted HIM	Convenient operation and diagnostics
Enhanced LCD	Clear parameter and status display
Full-numeric interface	Convenient parameter adjustment
Air cooled	Appropriate thermal management for high-power equipment
DC terminals	Supports the specified DC-bus architecture
PowerFlex 755 platform	Advanced industrial motor-control capability

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38. Five Same-Series Model Comparison

Model	Voltage	Current	ND Power	HD Power	Frame	Dimensions / Weight
20G11BC910AN2NNNNN	400 VAC	910 A	Approx. 500 kW	Approx. 400 kW	9	Approx. 2453 × 1200 × 600 mm; approx. 1246 kg
20G11BC1K0AN2NNNNN	400 VAC	1,040 A	560 kW	500 kW	9	Approx. 2453 × 1200 × 600 mm; approx. 1246 kg
20G11BC1K0JN2NNNNN	400 VAC	1,040 A	560 kW	500 kW	9	Approx. 2453 × 1200 × 600 mm; approx. 1246 kg
20G11BC1K1JN2NNNNN	400 VAC	1,110 A class	Higher-power class	Higher-power class	9	Frame 9 MCC style; configuration dependent
20G11BC1K2AN2NNNNN	400 VAC	1,200 A class	Higher-power class	Higher-power class	9	Frame 9 MCC style; configuration dependent

The closest alternative is 20G11BC1K0JN2NNNNN.

It maintains the same 1,040 A class and the same basic PowerFlex 755 Frame 9 architecture, while the filtering/CM-capacitor configuration is changed from the A configuration to the J configuration.

The 20G11BC910AN2NNNNN is useful when the motor current requirement is below the 1,040 A class.

The larger-current versions are more appropriate when the motor requires additional current capacity.

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39. Five Related Popular Models

Model	Series	Voltage	Current / Power	Application	Approx. Dimensions / Weight
20F1ANF263JN0NNNNN	PowerFlex 753	690 VAC	263 A / 250 kW ND / 200 kW HD	Large pumps, fans and conveyors	Approx. 881.5 × 430 × 349.6 mm; approx. 48 kg
20G11BC910JN2NNNNN	PowerFlex 755	400 VAC	910 A class	Large industrial motor control	Frame 9 MCC; approx. 2453 × 1200 × 600 mm
20G11BF590JN0NNNNN	PowerFlex 755	690 VAC	590 A class	High-voltage large motor systems	Frame 9; configuration dependent
25B-D030N114	PowerFlex 525	480 VAC class	Approx. 30 A class	General machine control	Compact frame; configuration dependent
20G1AND248AN0NNNNN	PowerFlex 755	480 VAC class	248 A / approx. 150 kW class	Industrial motor control	Configuration dependent

These models are not direct electrical replacements for one another.

They represent different voltage classes, current levels, physical formats and application ranges.

The most appropriate alternative depends on motor voltage, motor current, load type, duty requirement and installation environment.

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40. Selection Comparison

Requirement	Recommended Direction
Around 500–560 kW motor, 400 VAC	20G11BC1K0AN2NNNNN
Around 400–500 kW, lower current	20G11BC910AN2NNNNN
Same current but different CM configuration	20G11BC1K0JN2NNNNN
Larger motor current	Higher-current Frame 9 configuration
690 VAC large motor	PowerFlex 755 690 VAC configuration
Around 250 kW, 690 VAC	PowerFlex 753 263 A class
Small industrial machine	PowerFlex 525 family
Advanced high-power plant system	PowerFlex 755 family

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41. Product Lifecycle Consideration

The exact catalog number 20G11BC1K0AN2NNNNN is a legacy/discontinued configuration.

For an existing installation, this is important because the model may be encountered as:

• Existing installed equipment.
• Spare equipment.
• Maintenance stock.
• Refurbished equipment.
• Replacement equipment.

When replacing an existing drive, it is important to compare the complete catalog number rather than replacing it solely based on the 1,040 A rating.

The filtering configuration, CM jumper configuration, operator interface, braking configuration and cabinet arrangement should all be checked.

A direct replacement configuration may use a different catalog number while retaining the major electrical characteristics.

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42. Replacement Considerations

When replacing 20G11BC1K0AN2NNNNN, the following parameters should be checked carefully:

Check Item	Reason
Input voltage	Must remain compatible
Output current	Must meet motor requirements
Duty rating	ND/HD requirement must be maintained
Frame	Mechanical replacement must fit
Cabinet depth	Must match available space
HIM	Existing operator interface requirements
Filtering	EMC requirements
CM jumper	Grounding-system compatibility
Dynamic braking	Must match machine braking requirements
DC terminals	Required for the application if used
Network communication	Must match control architecture
Physical dimensions	Critical for MCC installation
Weight	Important for transportation and floor loading

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43. Overall Product Assessment

The 20G11BC1K0AN2NNNNN is a very large industrial AC drive designed for high-power motor applications.

Its 1,040 A output, 560 kW Normal Duty rating, 500 kW Heavy Duty rating and 630 kW Low Duty rating make it suitable for equipment operating at several hundred kilowatts.

The Frame 9 MCC-style construction is intended for centralized industrial electrical installations.

The combination of EMC filtering, door-mounted operator interface, advanced PowerFlex 755 control architecture and large current capacity makes it well suited to major industrial motor systems.

Its physical size is significant.

At approximately 2453 × 1200 × 600 mm and approximately 1,246 kg, it requires professional planning for transportation, installation, ventilation and maintenance.

The absence of an internal dynamic-braking transistor is not inherently a disadvantage.

It simply means that applications with significant regenerative energy must be evaluated separately.

For large pumps and fans, this configuration can be highly suitable.

For conveyors, crushers and other high-inertia machinery, braking and acceleration requirements should receive additional attention.

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44. Final Product Summary

The 20G11BC1K0AN2NNNNN is an Allen-Bradley PowerFlex 755 high-power air-cooled AC drive designed for large industrial motors.

Its principal specifications are:

Key Parameter	Specification
Model	20G11BC1K0AN2NNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product type	High-Power AC Variable Frequency Drive
Input voltage	400 VAC
Input phase	3 phase
Output current	1,040 A
Low Duty power	630 kW
Normal Duty power	560 kW
Heavy Duty power	500 kW
Frame	Frame 9
Cooling	Air cooled
Enclosure	IP20 / NEMA Type 1
Cabinet style	MCC style
Cabinet depth	600 mm
Filtering	EMC filter
CM jumper	Removed
Dynamic braking	No internal dynamic-braking transistor
Input type	AC input with precharge
DC terminals	Yes
Operator interface	Door-mounted enhanced LCD/full-numeric HIM
HIM protection	IP20 / NEMA Type 1
Dimensions H × W × D	Approximately 2453 × 1200 × 600 mm
Weight (kg)	Approximately 1,246 kg

The strongest features of this model are its very high 1,040 A current capability, 560 kW Normal Duty rating, 500 kW Heavy Duty rating, 400 VAC three-phase design, Frame 9 construction, EMC filtering and door-mounted enhanced LCD operator interface.

It is particularly suitable for large pumps, fans, blowers, conveyors, compressors, mining machinery, crushers, cooling systems, material-handling equipment and other large industrial rotating machinery.

For projects where the motor requires approximately 500–560 kW at 400 VAC, the 20G11BC1K0AN2NNNNN is a high-capacity solution within the PowerFlex 755 family.

The most important selection criteria are the motor nameplate current, motor voltage, duty classification, load torque, overload requirement, acceleration and deceleration characteristics, braking requirements, cabinet dimensions and communication requirements.

For an existing installation, the complete catalog number should be retained as the primary reference because the A filtering configuration, N braking configuration and 2 door-mounted HIM configuration are meaningful parts of the product specification.

In practical terms, this is a large, heavy-duty industrial drive intended for high-power motor control rather than small machine applications. Its large Frame 9 cabinet, approximately 1,246 kg weight and several-hundred-kilowatt power capability make it most appropriate for large-scale industrial facilities where motor speed control, process regulation and centralized electrical integration are required.