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Allen-Bradley 20G1G4F1K4MNDNNNNN PowerFlex 755 AC Drive

1. Product Overview

The Allen-Bradley 20G1G4F1K4MNDNNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control systems where high voltage, high current capacity, variable-speed operation, and reliable packaged construction are required.

This model belongs to the PowerFlex 755 family and is configured as an air-cooled 755 AC packaged drive. The F-series configuration is associated with the 690 VAC class, making this model suitable for large motors and high-power installations where a 690 V motor system is preferred. Catalog listings identify the exact 20G1G4F1K4MNDNNNNN as an air-cooled PowerFlex 755 packaged drive.

The F1K4 rating places this model near the upper end of the 690 V PowerFlex 755 range. The surrounding F-series catalog family includes F505, F565, F650, F735, F820, F920, F1K0, F1K1, F1K4 and other high-current configurations, providing a broad selection for large 690 V industrial motors.

The drive is intended for large industrial applications such as pumps, fans, compressors, conveyors, material-handling systems, mining equipment, cement machinery, water-treatment systems, process equipment, marine-related auxiliary systems, and other large motor-driven machinery.

Because of its high-voltage and high-current design, this model is much more suited to centralized electrical rooms and large process installations than to compact machine-level drive cabinets.

The M configuration is part of the packaged-drive configuration and is commonly associated with the large-frame PowerFlex 755 air-cooled arrangements used for high-power applications. The exact mechanical arrangement should be confirmed against the final configured catalog documentation before installation.

2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Model	20G1G4F1K4MNDNNNNN
Product Type	Air-Cooled 755 AC Packaged Drive
Drive Type	High-Power AC Variable Frequency Drive
Voltage Class	690 VAC
Input	Three-Phase AC
Cooling	Air Cooled
Mounting	Floor-Mounted / Packaged
Configuration	M-Series Packaged Configuration
Main Application	Large Industrial AC Motors
Typical Load	Pumps, fans, compressors, conveyors and process machinery
Application Level	High-Power Industrial

The exact catalog number is listed among PowerFlex 755 air-cooled packaged-drive configurations. Related catalog records also identify the F-series models as PowerFlex 755 AC drives.

3. Detailed Technical Parameters

Parameter	Specification
Model	20G1G4F1K4MNDNNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	Air-Cooled 755 AC Packaged Drive
Voltage Class	690 VAC
Input Phase	3 Phase
Input Frequency	50 / 60 Hz system dependent
Drive Architecture	PowerFlex 755
Cooling Method	Forced Air / Air Cooled
Mounting	Floor Mounted
Package Type	Industrial Packaged Drive
Rating Class	F1K4 High-Current Class
Approximate Current Class	1,400 A class*
Motor Application	Large 690 V Three-Phase AC Motors
Control	Advanced AC Motor Control
Typical Installation	Electrical Room / Drive Room
Enclosure	Packaged industrial enclosure
Approx. Height	2200–2400 mm*
Approx. Width	1600–2200 mm*
Approx. Depth	900–1200 mm*
Approx. Weight	1200–1800 kg*
Installation Orientation	Floor Standing
Typical Application	Pumps, fans, compressors, conveyors, process equipment
Industrial Duty	Continuous / Variable-Speed Industrial Applications

*The current figure, dimensions, and weight above should be treated as engineering planning values rather than certified mechanical specifications for every possible configuration. The catalog family confirms the F1K4 model position and packaged-drive construction, but the exact final cabinet size and shipping mass depend on the complete configured package.

The F1K4 designation indicates a very-high-current 690 V class configuration. For final electrical sizing, the actual nameplate current, applicable duty class, overload requirements, and exact catalog configuration should be checked against the final technical documentation.

4. Voltage Class and Application Position

The F-series PowerFlex 755 models are associated with the 690 VAC class.

This voltage level is commonly used in large industrial installations because increasing motor voltage allows very high motor power to be transmitted at lower current than would be required at a lower voltage.

For very large motors, this can provide practical benefits in cable sizing, switchgear arrangement, transformer utilization, and overall electrical-system design.

The 20G1G4F1K4MNDNNNNN therefore belongs to a class of equipment intended for large industrial motors rather than ordinary low-power machinery.

The surrounding F-series catalog contains configurations such as F505, F565, F650, F735, F820, F920 and larger ratings, demonstrating the broad high-power range available within this voltage class.

5. Product Introduction

The 20G1G4F1K4MNDNNNNN is designed to provide variable-speed control for very large three-phase AC motors.

Instead of connecting a large motor directly to the electrical supply and allowing it to operate at essentially fixed speed, the drive regulates the electrical output supplied to the motor.

This makes it possible to control motor speed according to actual process requirements.

For a pump, the motor can be operated at a speed corresponding to the required flow and pressure.

For a fan or blower, the motor can be adjusted according to airflow requirements.

For a conveyor, acceleration and deceleration can be controlled to reduce mechanical shock.

For a compressor, the motor can be operated within the required process-speed range.

For heavy process equipment, the drive can become an important part of the overall automation system rather than simply functioning as an electronic motor starter.

The high-voltage 690 V architecture is particularly appropriate for very large motors where the electrical distribution system is designed around high-voltage industrial motor loads.

6. High-Power Construction

The 20G1G4F1K4MNDNNNNN is not a compact wall-mounted inverter.

It is a large packaged drive intended for floor-mounted installation.

At this power level, the drive system contains substantial power-conversion equipment, cooling components, bus structures, switching devices, control electronics, protection components, and high-current connection points.

The floor-mounted design allows the drive to be incorporated into a larger electrical lineup or centralized drive room.

This arrangement is especially practical in large factories, processing plants, mines, utilities, water-treatment facilities, and other industrial sites where large motors are controlled from dedicated electrical rooms.

7. Main Functional Characteristics

High-Voltage Motor Control

The 690 VAC class allows the drive to serve large industrial motors while keeping the motor current within a manageable range compared with equivalent-power lower-voltage systems.

This makes the F-series particularly relevant to large motor installations.

Very High Current Capacity

The F1K4 designation represents a very-high-current configuration within the PowerFlex 755 F-series.

This gives the model the capacity required by very large industrial motors.

The actual motor current must still be checked against the final duty rating and motor nameplate before selection.

Variable-Speed Operation

The drive provides controlled motor speed rather than fixed-speed operation.

This is valuable when process requirements change during production.

Speed can be adjusted according to flow, pressure, material throughput, temperature, ventilation, or other process conditions.

Controlled Acceleration

Large motors can have substantial rotating inertia.

A controlled acceleration profile can reduce the sudden mechanical loading that would otherwise occur during direct starting.

This is particularly useful for conveyors, fans, pumps, compressors, and other large rotating systems.

Controlled Deceleration

The drive can also control motor stopping behavior.

This can be useful where sudden stopping would create mechanical shock or where the process requires a controlled rundown.

Air-Cooled Architecture

The model is configured as an air-cooled packaged drive.

At very high power levels, cooling becomes a major part of the installation design.

The electrical room therefore needs adequate airflow, ventilation, temperature control, and service clearance.

8. Typical Applications

Large Industrial Pumps

Large pumps are one of the most common applications for high-power AC drives.

Examples include raw-water pumps, cooling-water pumps, circulation pumps, industrial process pumps, mine dewatering pumps, and large wastewater pumps.

Variable-speed operation allows pump output to follow actual system demand.

Water and Wastewater Systems

Large water-treatment installations often contain motors with substantial power requirements.

The drive can be used for pumping, circulation, aeration-related equipment, filtration systems, and other large rotating machinery.

Adjustable speed provides a practical method for responding to changes in water flow and process demand.

Large Fans

Industrial ventilation systems frequently use large motors.

Potential applications include induced-draft fans, forced-draft fans, exhaust fans, cooling fans, combustion-air systems, and large process ventilation systems.

The drive can adjust fan speed to match airflow requirements.

Industrial Blowers

Large blowers used in wastewater treatment, chemical processing, steel production, cement plants, and industrial ventilation can benefit from variable-speed control.

The ability to change speed provides process flexibility and avoids operating the blower continuously at maximum speed when lower airflow is sufficient.

Compressors

Large compressors can require very high motor power.

A 690 V high-power drive can provide adjustable motor speed where the compressor system is designed for variable-speed operation.

Compressor-specific requirements such as minimum speed, pressure control, acceleration torque, operating envelope, and anti-surge control must be considered during system engineering.

Mining Conveyors

Mining conveyors can contain extremely large motors and long mechanical drivetrains.

Controlled acceleration is particularly important for large conveyor systems because the belt and material load can have significant inertia.

The drive can provide controlled speed changes and help coordinate motor operation with the overall material-handling process.

Crushers and Processing Equipment

Crushers, mills, feeders, and other heavy processing machinery can require large motor systems.

The final drive selection must account for the machine’s torque profile and overload requirements.

Cement Plants

Large fans, conveyors, pumps, mills, and material-handling systems are found throughout cement plants.

A high-power 690 V drive can be used where adjustable motor speed is required.

Steel Plants

Steel plants contain numerous large motors for cooling, pumping, ventilation, conveying, and process machinery.

The PowerFlex 755 platform can provide variable-speed control for suitable large-motor applications.

Marine and Heavy Industrial Auxiliary Systems

High-voltage motors are also used in large auxiliary systems where substantial power must be controlled.

Applications can include pumps, fans, compressors, and other rotating equipment.

9. Major Product Advantages

1. Designed for Very Large Motors

The 20G1G4F1K4MNDNNNNN belongs to the high-power end of the PowerFlex 755 family.

Its F-series 690 V architecture makes it suitable for large motor installations where lower-voltage drives would require substantially higher current.

2. 690 V Industrial Voltage Class

The higher motor voltage allows very large power levels to be handled without requiring the same current that would be necessary at lower motor voltages.

This can simplify certain aspects of large-motor electrical distribution.

3. High Current Capability

The F1K4 rating represents one of the larger current positions within the 690 V F-series range.

This makes it suitable for very large industrial equipment.

4. Variable-Speed Process Control

The drive allows motor speed to follow process requirements.

This can provide better control of pumping, ventilation, conveying, compression, and processing equipment.

5. Controlled Starting

Large motors can create substantial mechanical and electrical stress during starting.

Controlled acceleration can reduce the abrupt application of torque.

6. Flexible Industrial Applications

The same high-power drive platform can be applied across many industries.

Pumps, fans, conveyors, compressors, and process machinery can all use variable-speed AC drive technology when the motor and process characteristics are appropriate.

7. Floor-Mounted Packaged Construction

The packaged floor-standing arrangement is suitable for centralized electrical rooms.

It also provides a practical physical structure for large power connections and service access.

8. Air-Cooled Design

Air cooling provides a familiar industrial thermal-management approach.

The installation can be integrated into a suitably ventilated electrical room without requiring a liquid-cooling system.

9. Automation Integration

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

This allows the drive to function as part of a larger machine or plant control architecture.

10. Suitable for Large Centralized Drive Rooms

The physical design is particularly suitable for installations where multiple large drives are grouped together in an electrical or motor-control room.

10. Five Same-Series or Closely Related Models

The following models are closely related F-series PowerFlex 755 configurations and are useful when comparing high-power 690 V drive options.

Model	Voltage Class	Approx. Current Class	Configuration	Typical Application
20G1G4F565MNDNNNNN	690 VAC	565 A class	Air Cooled / Packaged	Large pumps, fans, conveyors
20G1G4F650MNDNNNNN	690 VAC	650 A class	Air Cooled / Packaged	Large industrial motors
20G1G4F735MNDNNNNN	690 VAC	735 A class	Air Cooled / Packaged	Large pumps, compressors
20G1G4F920MNDNNNNN	690 VAC	920 A class	Air Cooled / Packaged	Very large process equipment
20G1G4F1K4MNDNNNNN	690 VAC	1.4 kA class	Air Cooled / Packaged	Very large industrial motors

The listed F-series models are all cataloged as PowerFlex 755 AC drive configurations, and the exact requested F1K4 model is specifically listed as an air-cooled 755 AC packaged drive.

The F650 model is also documented as a 690 V AC PowerFlex 755 drive with a 650 A current specification, confirming the 690 V F-series application class.

11. Five Same-Brand Models for Comparison

The following are useful same-brand PowerFlex models for comparison across different voltage and power ranges.

Model	Series	Voltage Class	Current Class	Product Type	Typical Application
20G1G4C650JNDNNNNN	PowerFlex 755	400 VAC	650 A	Air-Cooled Packaged Drive	Large pumps and fans
20G1G4C750JNDNNNNN	PowerFlex 755	400 VAC	750 A	Air-Cooled Packaged Drive	Large industrial machinery
20G1G4D800KNANNNNN	PowerFlex 755	480 VAC	800 A	Air-Cooled Packaged Drive	High-power industrial equipment
20G1G4F920MNDNNNNN	PowerFlex 755	690 VAC	920 A class	Air-Cooled Packaged Drive	Very large motors
20G1G4F1K4MNDNNNNN	PowerFlex 755	690 VAC	1.4 kA class	Air-Cooled Packaged Drive	Extremely large industrial motors

These models provide a useful comparison between the 400 V, 480 V, and 690 V PowerFlex 755 configurations. The exact catalog family includes the C-, D-, and F-series configurations and numerous packaged-drive variants.

12. F-Series Model Progression

The F-series can be viewed as a high-voltage progression of increasing current capability.

Rating Position	Approximate Current Class	Typical Application Level
F505	500 A class	Large industrial motor
F565	565 A class	Large industrial motor
F650	650 A class	Large industrial motor
F735	735 A class	Very large motor
F820	820 A class	Very large motor
F920	920 A class	Very large process equipment
F1K0	1,000 A class	Extremely large motor
F1K4	1,400 A class	Extremely large industrial motor

The existence of these F-series configurations is reflected in catalog listings that include F505, F565, F650, F735, F820, F920, F1K0 and F1K4 packaged-drive models.

13. Comparison: F920 vs F1K4

Parameter	20G1G4F920MNDNNNNN	20G1G4F1K4MNDNNNNN
Voltage Class	690 VAC	690 VAC
Current Class	920 A	1,400 A class
Product Family	PowerFlex 755	PowerFlex 755
Cooling	Air Cooled	Air Cooled
Package	Packaged Drive	Packaged Drive
Application	Very large motors	Extremely large motors
Installation	Floor Mounted	Floor Mounted
Typical Use	Pumps, fans, compressors	Very large pumps, fans, compressors, process equipment

The F1K4 configuration provides a substantially higher current class than F920, making it appropriate for a different scale of motor installation.

14. Comparison: F735 vs F1K4

Parameter	20G1G4F735MNDNNNNN	20G1G4F1K4MNDNNNNN
Voltage	690 VAC	690 VAC
Current Class	735 A	1,400 A class
Product Family	PowerFlex 755	PowerFlex 755
Cooling	Air Cooled	Air Cooled
Installation	Floor Mounted	Floor Mounted
Motor Size	Large	Extremely Large
Typical Application	Pumps, fans, conveyors	Very large industrial machinery
Electrical Room Requirement	Large	Very large

The F735 and F1K4 are both part of the same 690 V PowerFlex 755 family but occupy substantially different current ranges.

15. Application in Pumping Systems

For a large pump, the ability to vary motor speed can be more useful than simply switching the motor on and off.

Pump demand may change throughout the production cycle.

The drive can respond to changes in required pressure or flow.

This can reduce unnecessary full-speed operation and provide more stable process control.

Large industrial pumps are also often associated with high inertia, making controlled acceleration and deceleration useful from a mechanical-system perspective.

16. Application in Large Fans

Large fans are another strong application for high-power AC drives.

Industrial ventilation requirements can vary significantly.

The drive can regulate fan speed according to airflow demand.

This is useful for process ventilation, combustion-air systems, cooling systems, exhaust systems, and large dust-removal installations.

The high-voltage architecture is particularly useful when the fan motor itself is a large 690 V machine.

17. Application in Conveyors

Long conveyors can contain large quantities of material and therefore have considerable inertia.

Starting the conveyor too aggressively can place additional mechanical stress on belts, gearboxes, shafts, and couplings.

A high-power variable-frequency drive provides a controlled acceleration profile.

Speed can also be adjusted to match material flow and upstream or downstream equipment.

18. Application in Mining

Mining operations frequently use high-power motors.

Examples include:

• Long conveyors
• Crushers
• Pumps
• Ventilation systems
• Feeders
• Processing machinery
• Material-transfer systems

The 690 V class is particularly relevant to large mining installations because of the high motor-power levels commonly encountered.

19. Application in Cement Production

Cement plants contain many high-power motor loads.

Typical equipment includes:

• Process fans
• Conveyors
• Crushers
• Pumps
• Mills
• Material-handling systems
• Dust-extraction equipment

The 20G1G4F1K4MNDNNNNN can be considered where the process requires variable-speed operation of a suitably sized 690 V motor.

20. Application in Steel and Heavy Manufacturing

Steel production and other heavy manufacturing processes require large amounts of mechanical power.

Large pumps, fans, cooling systems, conveyors, and process machines can use high-power variable-speed drives.

The drive can provide controlled motor operation while becoming part of the plant automation system.

21. Electrical Installation Considerations

A 690 V drive with very high current capacity requires careful electrical engineering.

The incoming transformer, switchgear, feeder, grounding system, protection devices, and motor cabling should all be designed around the actual drive configuration.

The motor cable system must also be evaluated for current capacity, voltage drop, insulation system, installation environment, and cable length.

Grounding is especially important for large drive systems.

The electrical installation should also consider harmonic behavior, electromagnetic compatibility, protective coordination, and the requirements of the overall plant electrical system.

22. Thermal Management

The drive is air cooled, so heat removal is an important installation requirement.

The electrical room must have sufficient cooling capacity to remove heat generated by the drive and associated equipment.

The room should also provide adequate airflow around the equipment.

High ambient temperature can affect the usable capacity of power electronics, so the final installation conditions should be checked against the applicable operating requirements.

23. Mechanical Installation

The 20G1G4F1K4MNDNNNNN should be considered large floor-standing electrical equipment.

For preliminary layout planning, the following approximate envelope can be used:

Height: 2200–2400 mm

Width: 1600–2200 mm

Depth: 900–1200 mm

For preliminary transportation and floor-loading calculations, an approximate planning weight of:

1200–1800 kg

can be used.

These values are not certified mechanical dimensions.

A large packaged drive can change substantially in width and weight depending on the power arrangement, cabinet sections, disconnect equipment, input/output configuration, cooling arrangement, filters, bus systems, auxiliary components, and other options.

The final mechanical drawing should therefore be used for actual foundation design, lifting calculations, shipping arrangements, and installation clearance.

24. Recommended Selection Procedure

For a project using this model, drive selection should begin with the motor nameplate.

The following information should be collected:

Selection Parameter	Required Information
Motor Voltage	690 VAC
Motor Current	Nameplate current
Motor Power	kW / hp
Motor Frequency	50 or 60 Hz
Motor Speed	Rated RPM
Starting Torque	Required torque
Continuous Torque	Application requirement
Overload	Required overload percentage and duration
Acceleration	Required acceleration time
Deceleration	Required stopping time
Load Inertia	Mechanical inertia
Duty Type	Variable torque / constant torque / heavy duty
Motor Cable	Length and construction
Ambient	Temperature and altitude
Installation	Indoor / protected industrial location

This information should then be compared with the exact PowerFlex 755 rating and configured package.

25. Parameter Summary

Parameter	Value
Model	20G1G4F1K4MNDNNNNN
Brand	Allen-Bradley
Family	PowerFlex
Series	PowerFlex 755
Product Type	Air-Cooled 755 AC Packaged Drive
Voltage Class	690 VAC
Phase	Three Phase
F-Series	Yes
F1K4 Rating	Approximately 1.4 kA class
Cooling	Air Cooled
Mounting	Floor Mounted
Package	Industrial Packaged Drive
Motor Type	Three-Phase AC
Typical Motor Level	Very Large Industrial Motors
Approx. Height	2200–2400 mm*
Approx. Width	1600–2200 mm*
Approx. Depth	900–1200 mm*
Approx. Weight	1200–1800 kg*
Typical Applications	Pumps, fans, compressors, conveyors, mining, cement, steel, process machinery
Installation	Industrial Electrical Room
Application Level	Very High Power

*Approximate planning values only.

26. Product Advantages at a Glance

Advantage	Description
High Voltage	690 VAC class for very large motor systems
High Current	F1K4 high-current configuration
Large Motor Capacity	Designed for very large industrial motors
Variable Speed	Motor speed can follow process requirements
Controlled Start	Reduced mechanical shock during acceleration
Controlled Stop	Controlled deceleration of large rotating loads
Air Cooling	Industrial forced-air thermal management
Floor Mounting	Suitable for centralized drive rooms
Packaged Construction	Integrated high-power industrial arrangement
Broad Application	Pumps, fans, conveyors, compressors and process equipment
Automation Integration	Suitable for larger industrial control architectures

27. Overall Product Description

The Allen-Bradley 20G1G4F1K4MNDNNNNN is a high-power PowerFlex 755 AC packaged drive intended for very large industrial motor applications.

Its 690 VAC F-series architecture and F1K4 high-current designation place it at the upper end of the PowerFlex 755 high-voltage drive range.

The exact catalog number is listed as an air-cooled 755 AC packaged drive, while the surrounding F-series catalog includes F565, F650, F735, F820, F920 and larger configurations.

This makes the model particularly appropriate for applications where a large 690 V motor must be operated with variable speed and controlled acceleration and deceleration.

Typical applications include large pumps, industrial fans, blowers, compressors, mining conveyors, cement equipment, steel-plant auxiliary machinery, water-treatment systems, and other high-power process equipment.

The major engineering advantage of using a 690 V high-power drive is that very large motor power can be handled at a comparatively lower current than would be required by an equivalent lower-voltage system.

The large floor-mounted packaged construction also makes the drive suitable for centralized electrical rooms and dedicated motor-control installations.

For procurement and engineering work, the most important points to verify are the exact 690 VAC configuration, applicable F1K4 current rating, motor duty, enclosure arrangement, cooling requirements, cable system, installation clearances, and final mechanical dimensions.

The dimensions and weight presented in this profile should be treated as preliminary planning values. For actual transportation, foundation, lifting, and electrical-room construction, the final configured mechanical documentation should always take precedence.