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1. Product Overview

The Allen-Bradley 20G1G4D800KNANNNNN is a high-power PowerFlex 755 AC drive designed for large industrial motor-control applications.

It is an air-cooled, floor-mounted packaged drive configuration intended for demanding three-phase AC motor installations. The model belongs to the PowerFlex 755 family and is associated with the 480 VAC class, Frame 9 high-power drive range. Catalog information identifies the exact model as an air-cooled PowerFlex 755 packaged drive.

The D800 rating is positioned in the upper portion of the 480 VAC PowerFlex 755 range. The published PowerFlex 755 selection data gives the D800 rating family a 960 A light-duty rating, 800 A normal-duty rating, and 710 A heavy-duty rating, corresponding to approximately 800 hp, 700 hp, and 600 hp respectively.

This makes the 20G1G4D800KNANNNNN suitable for large motors used in pumps, fans, blowers, compressors, conveyors, material-handling systems, process machinery, water treatment, mining, cement production, utilities, and other heavy industrial equipment.

The packaged construction is particularly useful where a large drive needs to be installed as part of a centralized electrical-room or motor-control arrangement rather than as a compact wall-mounted inverter.

The exact catalog number is also documented as a PowerFlex 755 AC Drive and appears in the PowerFlex 755 product family listings together with closely related D-series ratings such as D710, D740, D800, and D960.

2. Brand and Product Series

Item	Description
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755
Model	20G1G4D800KNANNNNN
Product Type	Air-Cooled 755 AC Packaged Drive
Drive Class	High-Power AC Variable Frequency Drive
Voltage Class	480 VAC
Input Phase	Three Phase
Normal-Duty Current	800 A
Light-Duty Current	960 A
Heavy-Duty Current	710 A
Normal-Duty Motor Rating	700 hp
Light-Duty Motor Rating	800 hp
Heavy-Duty Motor Rating	600 hp
Frame	Frame 9
Cooling	Air Cooled
Mounting	Floor Mounted / Packaged
Enclosure Configuration	K-type packaged configuration, associated with IP54 / NEMA 12, 800 mm deep construction
Typical Application	Large industrial AC motors

The published PowerFlex 755 selection data identifies the D800 class as Frame 9, with 960 A / 800 hp light duty, 800 A / 700 hp normal duty, and 710 A / 600 hp heavy duty. The same selection documentation identifies the K enclosure option as an 800 mm deep IP54 / NEMA 12 configuration with MCC power-bus provisions.

3. Detailed Technical Parameters

Parameter	Specification
Model	20G1G4D800KNANNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	Air-Cooled 755 AC Packaged Drive
Drive Category	Variable Frequency AC Drive
Input Voltage	480 VAC class
Input Phase	3 Phase
Frequency	50 / 60 Hz system dependent
Light-Duty Current	960 A
Light-Duty Motor Rating	800 hp
Normal-Duty Current	800 A
Normal-Duty Motor Rating	700 hp
Heavy-Duty Current	710 A
Heavy-Duty Motor Rating	600 hp
Frame Size	Frame 9
Cooling	Forced Air / Air Cooled
Mounting	Floor Mounted
Enclosure Depth	Approx. 800 mm for the K enclosure configuration
Enclosure Class	IP54 / NEMA 12 associated with K configuration
Package Type	Factory-configured packaged drive
Motor Type	Three-phase AC motor
Control Type	PowerFlex 755 advanced AC motor control
Typical Motor Size	Up to approximately 700 hp at normal duty
Typical Application	Large industrial variable-speed machinery
Approx. Dimensions	Approx. 2100–2300 mm H × 1200–1800 mm W × 800 mm D*
Approx. Weight	Approx. 800–1200 kg*
Installation Environment	Industrial electrical room / protected industrial area
Application Level	Large industrial / heavy-duty motor control

*The dimensions and weight above are engineering planning estimates, not certified mechanical dimensions for every possible packaged configuration. Frame 9 floor-mounted equipment can vary in width and total weight depending on cabinet arrangement, incoming protection, disconnect equipment, power options, filters, auxiliary sections, bus configuration, and other selected options. The final mechanical drawing for the exact configured unit should be used for transportation, foundation, lifting, and installation calculations.

The electrical rating information is substantially more certain: the D800 PowerFlex 755 rating family is documented at 960 A LD / 800 hp, 800 A ND / 700 hp, and 710 A HD / 600 hp.

4. Understanding the D800 Rating

The “D800” portion of the model designation corresponds to a major high-power rating position in the PowerFlex 755 480 VAC range.

For light-duty operation, the published rating is 960 A and 800 hp.

For normal-duty operation, the rating is 800 A and 700 hp.

For heavy-duty operation, the rating is 710 A and 600 hp.

This distinction is important because the correct drive selection should not be based solely on the horsepower printed on a motor nameplate.

A large conveyor, crusher, compressor, or similar machine can have considerably different overload and starting requirements from a centrifugal pump or fan.

The motor’s full-load current, required acceleration torque, overload duration, operating speed range, load inertia, braking requirements, and actual process duty should all be considered before final selection.

5. Product Introduction

The 20G1G4D800KNANNNNN is a large-frame PowerFlex 755 AC drive intended for applications where motor power requirements are too high for compact variable-frequency drives.

The 800 A normal-duty rating places this model in the high-capacity range of the PowerFlex 755 platform.

The drive converts incoming three-phase AC power into a controlled variable-frequency and variable-voltage output suitable for operating an AC motor at adjustable speed.

This allows the motor to operate according to process requirements rather than simply running continuously at full speed.

For large pumps and fans, this can provide better control of flow and pressure.

For conveyors, it allows controlled acceleration and deceleration.

For compressors and process machinery, it provides adjustable motor speed and operating control.

For material-handling equipment, it can provide smoother machine operation and more controlled starting characteristics.

The floor-mounted packaged design is intended for industrial electrical installations where the drive is installed as a substantial piece of power equipment rather than as a small cabinet-mounted electronic module.

The model is specifically identified in product listings as an air-cooled PowerFlex 755 AC packaged drive.

6. Main Functional Characteristics

High-Power AC Motor Control

The main purpose of the 20G1G4D800KNANNNNN is to control large three-phase AC motors.

With an 800 A normal-duty rating and 700 hp normal-duty capacity, it is designed for substantial industrial machinery.

The drive can regulate motor speed and operating conditions while providing controlled starting and stopping.

Air-Cooled Power Conversion

The drive uses an air-cooled architecture.

At this power level, heat management becomes an important part of the installation design.

The electrical room must provide suitable ventilation and heat removal, and the drive should be installed with the required service and airflow clearances.

Floor-Mounted Packaged Construction

The unit is designed as a large floor-mounted packaged drive.

This arrangement is appropriate for industrial electrical rooms, centralized drive rooms, process plants, and large motor-control installations.

The packaged construction also provides a more organized arrangement for high-current power connections and associated control equipment.

High Current Capability

The 800 A normal-duty rating provides considerable capacity for large motors.

The 960 A light-duty rating provides additional capacity for suitable variable-torque or other applications where the light-duty rating is applicable.

The 710 A heavy-duty rating is intended for applications requiring more demanding overload characteristics but at a lower continuous horsepower rating.

7. Typical Applications

Large Water Pumps

The 20G1G4D800KNANNNNN is suitable for large water-pumping installations.

Typical applications include raw-water pumps, cooling-water pumps, circulation pumps, high-capacity process pumps, and municipal pumping equipment.

Variable-speed operation allows the motor speed to be adjusted according to pressure, flow, or process requirements.

Wastewater Treatment

Large wastewater treatment plants use substantial motors for pumping, aeration, sludge handling, filtration, and circulation.

A high-power variable-frequency drive can provide controlled motor operation for these systems.

The ability to adjust motor speed is particularly useful when process demand changes throughout the day.

Large Fans and Blowers

Industrial fans and blowers are often suitable applications for large PowerFlex drives.

Examples include ventilation fans, combustion-air fans, induced-draft fans, forced-draft fans, exhaust systems, dust-collection systems, and process blowers.

Variable-speed control allows airflow to be adjusted without continuously operating the motor at full speed.

Compressors

Large compressors can require hundreds of horsepower and substantial starting torque.

The 20G1G4D800KNANNNNN can be considered for suitable compressor applications where variable-speed AC motor control is required.

The exact compressor application should be evaluated for minimum-speed requirements, acceleration torque, pressure control, operating envelope, and overload characteristics.

Conveyors

Large conveyor systems are another important application area.

Mining conveyors, bulk-material conveyors, port equipment, cement conveyors, and heavy manufacturing conveyors can require very large motors.

Controlled acceleration can help reduce mechanical shock to belts, couplings, gearboxes, and other drivetrain components.

Mining Equipment

Mining operations use large motors throughout the production process.

Potential applications include conveyors, crushers, feeders, pumps, ventilation systems, material-handling equipment, and processing machinery.

The high current capacity of the D800 configuration makes it suitable for large motor installations where a smaller frame would not provide sufficient current capacity.

Cement and Aggregate Equipment

Cement plants contain numerous large motors.

Typical equipment includes large fans, conveyors, crushers, pumps, separators, and process machinery.

The PowerFlex 755 platform can be integrated into these applications where adjustable-speed operation is required.

Steel and Heavy Manufacturing

Steel plants and heavy manufacturing facilities use large motors for cooling systems, pumps, fans, conveyors, process lines, and auxiliary machinery.

The floor-mounted high-power configuration is well suited to centralized electrical rooms serving these types of industrial loads.

Material Handling

Large material-handling systems frequently require controlled acceleration and deceleration.

Applications may include bulk conveyors, feeders, transfer systems, elevators, and other large rotating machinery.

8. Major Product Advantages

1. High-Power Capability

The 800 A normal-duty rating allows the drive to handle large motors.

This is one of the primary reasons to select a D800 configuration rather than a smaller PowerFlex 755 rating.

2. Three Duty Classes

The same D800 rating family provides different operating capacities for light-duty, normal-duty, and heavy-duty applications.

Duty Class	Current	Horsepower
Light Duty	960 A	800 hp
Normal Duty	800 A	700 hp
Heavy Duty	710 A	600 hp

This allows the drive to be matched to different load characteristics rather than using a single horsepower figure for every application.

3. Large Motor Compatibility

The model is intended for large three-phase AC motors.

Its 700 hp normal-duty rating places it well beyond the range of ordinary compact industrial VFDs.

4. Controlled Acceleration

Large motors can produce significant mechanical stress when started directly across the line.

A variable-frequency drive provides controlled acceleration so that motor speed can be increased progressively.

This is useful for conveyors, fans, pumps, compressors, and other high-inertia equipment.

5. Controlled Deceleration

The drive can also control motor deceleration.

This is particularly useful where sudden stopping could create mechanical shock or disturb the production process.

6. Variable-Speed Process Control

The motor can operate at different speeds according to process requirements.

For pumps and fans, this can improve flow and pressure control.

For conveyors and process machinery, it can improve production flexibility.

7. Floor-Mounted Industrial Construction

The floor-mounted arrangement is suitable for large electrical rooms and centralized drive systems.

It provides a practical physical arrangement for high-power equipment and associated cabling.

8. Enclosed Industrial Configuration

The K configuration is associated with an 800 mm deep IP54 / NEMA 12 enclosure arrangement.

This provides a substantially more protected physical configuration than an open-frame drive and is appropriate for many industrial electrical-room installations.

9. Broad Industrial Application Range

The same basic drive platform can be used across pumping, ventilation, conveying, compression, processing, and material-handling applications.

This makes it a versatile high-power drive platform for industrial automation projects.

10. Suitable for Centralized Automation

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

The drive can therefore form part of a larger motor-control architecture rather than operating as an isolated speed controller.

9. Five Same-Series or Closely Related Models

The following models are useful related PowerFlex 755 configurations around the same high-power D-series range.

Model	Voltage Class	Light Duty	Normal Duty	Heavy Duty	Frame
20G1G4D617JNDNNNNN	480 VAC, 3 PH	765 A / 650 hp	617 A / 500 hp	545 A / 450 hp	Frame 8
20G1G4D710JNDNNNNN	480 VAC, 3 PH	765 A / 650 hp class	710 A / 600 hp	545 A / 450 hp	Frame 8
20G1G4D740MNDNNNNN	480 VAC, 3 PH	Approx. 800 A class	Approx. 740 A / 650 hp	Approx. 617 A / 500 hp	Large-frame
20G1G4D800KNANNNNN	480 VAC, 3 PH	960 A / 800 hp	800 A / 700 hp	710 A / 600 hp	Frame 9
20G1G4D960LNDNNNNN	480 VAC, 3 PH	Approx. 1045 A / 900 hp	960 A / 800 hp	795 A / 700 hp	Frame 9

The D800 and D960 positions are adjacent high-power configurations in the PowerFlex 755 range, while the D617, D710, and D740 positions provide lower-capacity alternatives. Exact suffixes should be checked because the enclosure and option characters can materially affect the final physical configuration. The catalog listings also show D710, D740, D800, and D960 configurations as PowerFlex 755 AC drives.

10. Five Same-Brand Models for Comparison

The following models are useful same-brand comparison models for large AC motor-control projects.

Model	Series	Voltage Class	Normal-Duty Reference	Frame / Class	Typical Application
20G1G4C650JNDNNNNN	PowerFlex 755	400 VAC	650 A / 355 kW class	Frame 8	Large pumps, fans, conveyors
20G1G4C750JNDNNNNN	PowerFlex 755	400 VAC	750 A / 400 kW class	Frame 8	Large industrial machinery
20G1G4C920JNDNNNNN	PowerFlex 755	400 VAC	920 A / 500 kW class	Large frame	Heavy process machinery
20G1G4D740MNDNNNNN	PowerFlex 755	480 VAC	740 A / 650 hp class	Large frame	Pumps, compressors, conveyors
20G1G4D800KNANNNNN	PowerFlex 755	480 VAC	800 A / 700 hp	Frame 9	High-power industrial equipment

The PowerFlex 755 catalog family includes both 400 V C-series and 480 V D-series configurations, allowing system designers to select the appropriate voltage class and current rating for the motor installation.

11. C-Series and D-Series Difference

One of the most important selection considerations is the voltage class.

The C-series configurations are associated with the 400 VAC class, while the D-series configurations are associated with the 480 VAC class.

The 20G1G4D800KNANNNNN therefore belongs to the high-power 480 VAC D-series range.

This distinction is important because two models may have similar current ratings while having different voltage classes and therefore different usable motor-power ranges.

12. D710 vs D740 vs D800 vs D960

Parameter	D710	D740	D800	D960
Voltage Class	480 VAC	480 VAC	480 VAC	480 VAC
Normal-Duty Current	Approx. 710 A	Approx. 740 A	800 A	960 A
Typical ND Horsepower	600 hp class	650 hp class	700 hp	800 hp
Relative Capacity	High	Higher	Very High	Extremely High
Typical Frame Range	8	8 / large-frame	9	9
Cooling	Air Cooled	Air Cooled	Air Cooled	Air Cooled
Typical Use	Large motors	Large motors	Very large motors	Very large motors
Installation	Floor / packaged	Floor / packaged	Floor / packaged	Floor / packaged

The D800 model occupies an important position between the D740 and D960 classes, providing 800 A normal-duty output capacity and 700 hp normal-duty motor capacity.

13. Electrical System Considerations

An 800 A-class variable-frequency drive represents a substantial electrical load.

The incoming power system must therefore be designed with suitable transformer capacity, feeder conductors, overcurrent protection, grounding, disconnecting means, short-circuit considerations, and coordination with the facility electrical system.

The installation should not be treated as a simple replacement for a smaller VFD.

The upstream switchgear and protection equipment must be selected for the actual drive configuration.

Motor-side cabling must also be evaluated carefully.

Cable length, motor insulation, grounding, installation method, switching characteristics, and motor construction can influence the final design.

14. Thermal and Ventilation Requirements

Because this is an air-cooled high-power drive, heat dissipation is an important part of the installation.

The electrical room must have adequate ventilation or HVAC capacity to remove the heat generated by the drive and associated equipment.

The drive should have sufficient clearance around air-intake and exhaust areas.

Dust, moisture, corrosive contaminants, and ambient temperature should also be considered when determining the final installation environment.

15. Mechanical Installation

The 20G1G4D800KNANNNNN should be treated as large floor-mounted electrical equipment.

A preliminary planning envelope of approximately:

2100–2300 mm height

1200–1800 mm width

800 mm depth

can be used for early electrical-room layout work.

The K enclosure configuration is associated with an 800 mm deep IP54 / NEMA 12 arrangement in the PowerFlex 755 selection documentation.

The actual cabinet width can vary substantially depending on the exact packaged arrangement.

For shipping and installation planning, an approximate equipment weight range of:

800–1200 kg

can be used as a preliminary planning value.

This should not be confused with the 96 kg shipping/product weight shown on one third-party listing for the exact catalog number. That figure is not consistent with the physical scale normally expected for a complete Frame 9 packaged 800 A cabinet, so it should not be used for foundation, lifting, or transportation engineering.

16. Recommended Motor-Selection Method

When applying the 20G1G4D800KNANNNNN, motor current should be checked first.

The motor nameplate current should be compared with the applicable drive duty rating.

For a variable-torque pump or fan, the light-duty capacity may be relevant.

For a conventional industrial motor application, the normal-duty rating may be the appropriate reference.

For a conveyor, crusher, hoist-related system, or other application requiring substantial overload torque, the heavy-duty rating should be evaluated carefully.

The final selection should consider:

• Motor rated current
• Motor voltage
• Motor horsepower or kW
• Required starting torque
• Continuous torque
• Overload duration
• Acceleration time
• Load inertia
• Minimum operating speed
• Maximum operating speed
• Braking requirements
• Ambient temperature
• Installation altitude
• Motor cable length
• Process duty cycle

17. Typical Application Matrix

Application	Suitability	Main Reason
Large Water Pump	High	High current and adjustable speed
Cooling-Water Pump	High	Flow and pressure control
Wastewater Pump	High	Variable process demand
Large Fan	High	Adjustable airflow
Industrial Blower	High	Variable process airflow
Conveyor	High	Controlled acceleration
Mining Conveyor	High	Large motor capacity
Crusher	Application dependent	High torque requirements must be checked
Compressor	High / application dependent	Motor current and torque profile must be verified
Cement Equipment	High	Large motor control
Steel Plant Auxiliary Equipment	High	High-capacity variable-speed control
Material Handling	High	Controlled motor operation
Process Machinery	High	Adjustable speed and torque
HVAC Chiller Pump	High	Variable flow control
Industrial Cooling Tower Fan	High	Adjustable fan speed

18. Advantages in Pump Applications

For centrifugal pumps, variable-speed control can be particularly useful because pump output can be adjusted according to actual process demand.

Instead of continuously operating a motor at full speed and using downstream throttling, the drive can regulate motor speed according to the required operating point.

This can provide smoother pressure and flow control.

It can also reduce unnecessary operation at maximum motor speed when process demand is lower.

19. Advantages in Conveyor Applications

Conveyor systems can experience considerable mechanical stress during starting.

A large motor connected directly to the power system can produce a rapid acceleration event.

A variable-frequency drive allows the acceleration profile to be controlled.

This can help reduce shock loading on belts, couplings, gearboxes, shafts, and other mechanical components.

For long conveyors, controlled starting can also help manage the behavior of the conveyor belt and material load.

20. Advantages in Fan Applications

Fans are frequently operated under varying process conditions.

The D800 drive can allow the motor speed to be adjusted to match actual airflow requirements.

This is useful for large ventilation systems, process exhaust, dust extraction, combustion air, and cooling applications.

The drive therefore becomes part of the process-control system rather than simply functioning as an electronic motor starter.

21. Advantages in Heavy Industrial Plants

The main value of a drive at this power level is not simply the ability to start a motor.

It provides a method of controlling a large rotating machine as part of a larger production process.

Speed can be adjusted.

Acceleration can be controlled.

Stopping can be controlled.

Motor operating conditions can be monitored.

The drive can be integrated with other industrial control equipment.

This makes a high-power PowerFlex 755 installation suitable for plants where motor operation is directly connected to production performance.

22. Product Identification Summary

Identification	Details
Brand	Allen-Bradley
Model	20G1G4D800KNANNNNN
Product Family	PowerFlex
Series	PowerFlex 755
Product Type	Air-Cooled 755 AC Packaged Drive
Voltage	480 VAC class
Phase	Three Phase
Frame	Frame 9
Light Duty	960 A / 800 hp
Normal Duty	800 A / 700 hp
Heavy Duty	710 A / 600 hp
Cooling	Air Cooled
Mounting	Floor Mounted
Enclosure	K configuration, associated with IP54 / NEMA 12, 800 mm deep
Approx. Dimensions	2100–2300 × 1200–1800 × 800 mm*
Approx. Weight	800–1200 kg*
Typical Motor	Large three-phase AC motor
Main Applications	Pumps, fans, compressors, conveyors, mining, process machinery
Application Level	High-power industrial

*Planning estimates only. Final dimensions and weight should be taken from the exact configured mechanical documentation.

23. Final Product Description

The Allen-Bradley 20G1G4D800KNANNNNN is a high-capacity PowerFlex 755 AC drive designed for large industrial motor-control applications.

Its 480 VAC three-phase configuration, 800 A normal-duty rating, 700 hp normal-duty capacity, and Frame 9 construction place it firmly in the high-power section of the PowerFlex 755 family.

The drive is supplied as an air-cooled packaged configuration and is intended for floor-mounted industrial installations. Product listings specifically identify the exact 20G1G4D800KNANNNNN catalog number as an air-cooled 755 AC packaged drive.

The 960 A light-duty rating gives the drive additional capacity for suitable variable-torque or light-duty applications, while the 710 A heavy-duty rating provides a lower continuous current level for applications with more demanding overload requirements.

The K enclosure configuration is associated with an 800 mm deep IP54 / NEMA 12 packaged arrangement, making this configuration particularly relevant to protected industrial electrical-room installations.

The 20G1G4D800KNANNNNN is therefore well suited to large pumps, fans, blowers, compressors, conveyors, mining machinery, cement equipment, water-treatment systems, material-handling equipment, and other high-power industrial machinery where controlled AC motor operation is required.

For procurement and engineering work, the most important specifications to verify are the 480 VAC input class, 800 A normal-duty rating, 960 A light-duty rating, 710 A heavy-duty rating, 700 hp normal-duty motor rating, Frame 9 construction, air-cooled design, and exact K-enclosure configuration.

The final physical dimensions, shipping weight, power-cable arrangement, protective-device configuration, and auxiliary equipment should be confirmed against the exact configured unit before installation.