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1. Product Overview

The Allen-Bradley 20G1G3F920LNDNNNNN is a high-power, air-cooled, floor-mounted AC drive in the PowerFlex 755T / PowerFlex 755TL family.

It is designed for large three-phase motor applications where high power, controlled motor speed, torque regulation, low-harmonic operation, and integration with an industrial automation system are required.

The model belongs to the 690 V high-power range and is associated with a 920 A Normal Duty rating, with approximately 900 kW Normal Duty output power. The corresponding Light Duty rating is approximately 1,000 kW at 1,074 A, while the Heavy Duty rating is approximately 800 kW at 820 A.

This places the 20G1G3F920LNDNNNNN near the upper end of the standard air-cooled 690 V PowerFlex 755TL range. It is intended for large industrial machines rather than compact machine-level drives.

2. Brand and Product Series

Item	Description
Model	20G1G3F920LNDNNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755T
Specific Series	PowerFlex 755TL
Product Type	Air-Cooled Low-Harmonic AC Drive
Construction	Floor-Mounted Packaged Drive
Voltage Class	690 V AC
Phase	Three Phase
Cooling	Air Cooled / Forced Air
Enclosure	Type 1 / IP21 class
Main Function	High-Power Variable-Speed Motor Control
Application Level	Large Industrial / Process Automation

The catalog designation is listed within the 690 V PowerFlex 755T low-harmonic drive range, with the 920 A Normal Duty class corresponding to approximately 900 kW.

3. Main Technical Parameters

Parameter	Specification
Model	20G1G3F920LNDNNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755T
Sub-Series	PowerFlex 755TL
Product Type	Air-Cooled Low-Harmonic AC Drive
Input Voltage	690 V AC class
Input Phase	3 Phase
Cooling	Forced Air
Installation	Floor Mount
Enclosure Class	Type 1 / IP21
Normal Duty Current	920 A
Normal Duty Power	Approx. 900 kW
Light Duty Current	1074 A
Light Duty Power	Approx. 1000 kW
Heavy Duty Current	820 A
Heavy Duty Power	Approx. 800 kW
Input Architecture	Low-Harmonic / Active Front-End Class
Motor Type	Three-Phase AC Motor
Drive Construction	Large Cabinet / Packaged Drive
Typical Motor Range	Several Hundred kW to approximately 1 MW
Typical Installation	Electrical Room / Drive Room
Typical Applications	Pumps, Fans, Compressors, Conveyors, Mills, Crushers, Process Machinery
Approx. Dimensions	Approx. 2300 × 1400 × 1400 mm H × W × D*
Approx. Weight	Approx. 500–700 kg*
Operating Environment	Industrial Environment
Control Application	Speed, Torque and Process Control
Automation Integration	PLC / HMI / Industrial Network
Duty Capability	Light Duty / Normal Duty / Heavy Duty

*Dimensions and weight are preliminary planning figures for a large-frame cabinet installation. The exact physical dimensions and shipping weight can vary with cabinet arrangement, incoming-power equipment, filters, disconnects, options, and other configuration details. The final mechanical drawing and shipping documentation for the exact unit should be used for installation, transportation, lifting, and foundation calculations.

4. Power Rating

The most important characteristic of the 20G1G3F920LNDNNNNN is its very high power capacity.

The model is associated with the following duty ratings:

Duty Rating	Current Rating	Approx. Power Rating
Light Duty	1,074 A	1,000 kW
Normal Duty	920 A	900 kW
Heavy Duty	820 A	800 kW

This rating structure provides flexibility for different industrial load types.

A large centrifugal pump, for example, normally has a different overload requirement from a crusher or heavy conveyor.

The drive should therefore be selected according to the actual motor current, load profile, acceleration requirements, overload requirements, and operating conditions rather than simply matching the motor’s nameplate kW.

5. Product Introduction

The 20G1G3F920LNDNNNNN is designed for large industrial motors that require continuously adjustable speed and controlled torque.

At this power level, the drive is normally installed as part of a complete electrical and automation system.

The drive receives electrical power from the plant supply, controls the electrical energy delivered to the motor, and allows the motor speed and torque to be adjusted according to process requirements.

This arrangement is particularly useful for large rotating equipment.

A pump may need to maintain a specific pressure or flow.

A fan may need to maintain a particular airflow or process pressure.

A conveyor may require controlled acceleration and synchronized speed.

A compressor may need to respond to changing production demand.

A mill or crusher may require controlled motor operation under changing mechanical loads.

In each case, the drive provides a controllable interface between the electrical supply, the motor, the mechanical machine, and the plant automation system.

6. PowerFlex 755TL Positioning

The PowerFlex 755TL designation is particularly important for this model.

The 755TL range is designed around low-harmonic AC drive operation.

Large variable-frequency drives can have a significant effect on the electrical system because of the current waveform drawn from the incoming supply.

For large industrial plants, harmonics can become an important engineering consideration.

The low-harmonic architecture is intended to provide improved input-current characteristics compared with a conventional six-pulse drive arrangement.

This makes the 755TL platform suitable for plants where electrical power quality, transformer loading, harmonic management, and interaction with other electrical equipment are important design considerations.

7. 690 V Three-Phase Architecture

The 690 V class is intended for large industrial motor systems.

As motor power increases, the required motor current also increases.

Using a higher motor voltage helps keep the operating current within a practical range for large motors.

This becomes particularly important when motor ratings approach several hundred kilowatts or approximately one megawatt.

The 690 V architecture therefore makes the 20G1G3F920LNDNNNNN suitable for applications such as:

• Large water pumps
• Large process pumps
• Industrial fans
• Large compressors
• Mining conveyors
• Crushers
• Grinding equipment
• Cement machinery
• Material-handling systems
• Large process machines

8. Air-Cooled Construction

The drive uses an air-cooled architecture.

At approximately 900 kW Normal Duty, thermal management becomes a major part of the installation design.

Power semiconductors, capacitors, bus components, reactors, switching devices, and other power components generate heat during operation.

Forced-air cooling is used to move heat away from these components.

The drive room must therefore be designed with adequate ventilation.

The room should also prevent excessive contamination from dust, oil mist, moisture, fibers, and other industrial materials.

In heavy industrial applications, the surrounding environment can be just as important as the drive’s electrical rating.

9. Floor-Mounted Cabinet Design

The 20G1G3F920LNDNNNNN is a large floor-mounted drive.

It is not intended to be treated like a compact wall-mounted inverter.

The installation normally requires dedicated floor space and appropriate access for:

• Incoming power cables
• Motor cables
• Control cables
• Communication wiring
• Cooling airflow
• Maintenance
• Inspection
• Lifting
• Cabinet doors
• Adjacent electrical equipment

A dedicated electrical room or drive room is generally the most practical installation environment for a drive of this size.

10. Main Functions

The drive can be used for a broad range of high-power motor-control functions.

Typical functions include:

• Variable-speed motor control
• Speed regulation
• Torque control
• Controlled acceleration
• Controlled deceleration
• Motor protection
• Drive fault monitoring
• Drive status monitoring
• Process control
• Feedback-based control
• PLC integration
• HMI integration
• Industrial communication
• Diagnostic monitoring
• Operating-status feedback

11. Application — Large Pumping Systems

Large pumping stations are an important application for the 20G1G3F920LNDNNN.

Potential applications include:

• Raw-water pumps
• Water-transfer pumps
• Booster pumps
• Cooling-water pumps
• Process-water pumps
• Wastewater pumps
• Desalination-related pumping equipment
• Industrial circulation pumps

The drive can vary pump speed according to pressure, flow, tank level, or another process variable.

This allows the motor to operate according to actual process demand rather than remaining at a fixed maximum speed.

12. Application — Large Industrial Fans

Large industrial fans can require several hundred kilowatts of motor power.

Typical applications include:

• Furnace fans
• Process-exhaust fans
• Dust-extraction fans
• Cooling fans
• Combustion-air fans
• Mine ventilation
• Tunnel ventilation
• Large HVAC systems
• Industrial ventilation

The drive can regulate fan speed according to airflow, pressure, temperature, or another control variable.

This makes it possible to integrate the fan into a wider process-control system.

13. Application — Mining

Mining operations frequently use very large motors.

The 20G1G3F920LNDNNNNN can be considered for:

• Long conveyors
• Large crushers
• Grinding systems
• Mine ventilation
• Dewatering pumps
• Ore-processing machinery
• Material-handling systems
• Large process fans

Mining equipment often operates continuously and under demanding mechanical conditions.

Controlled motor acceleration can be useful for reducing mechanical shock when starting heavy conveyors and rotating machinery.

14. Application — Cement Production

Cement plants contain many high-power motors.

The drive can be used with:

• Raw-material mills
• Cement mills
• Large process fans
• Crushers
• Material conveyors
• Dust-extraction systems
• Large pumps
• Auxiliary process equipment

Cement plants can also produce significant dust.

For an air-cooled drive, the electrical room should therefore be designed to prevent excessive dust entering the cooling system.

15. Application — Steel and Metals

Steel plants and metal-processing facilities frequently use large motor systems.

Potential applications include:

• Cooling-water pumps
• Large process fans
• Material conveyors
• Production-line equipment
• Large auxiliary motors
• Ventilation systems
• Cooling systems
• Material-handling machinery

The ability to regulate motor speed and torque can help integrate large rotating machines into automated production processes.

16. Application — Water and Wastewater

Large municipal and industrial water facilities can use motors approaching or exceeding several hundred kilowatts.

The drive can be considered for:

• Main pumping stations
• Transfer stations
• Booster systems
• Cooling-water systems
• Industrial water circulation
• Wastewater treatment
• Large process pumps

The drive can receive commands from the plant control system and adjust pump speed according to process conditions.

17. Application — Compressors

Large compressors can require substantial motor power.

A variable-speed drive can control compressor motor speed according to process demand.

Potential applications include:

• Industrial compressed air
• Process gas
• Chemical plants
• Petrochemical facilities
• Utility systems
• Large refrigeration or cooling systems

The final selection should consider compressor torque characteristics, starting requirements, speed range, and motor operating conditions.

18. Application — Conveyors

The 20G1G3F920LNDNNNNN is particularly relevant to very large conveyor systems.

Large conveyors can contain substantial mechanical inertia.

Starting such a system without controlled acceleration can impose high mechanical loads on:

• Gearboxes
• Couplings
• Shafts
• Belts
• Rollers
• Bearings
• Conveyor structures

Controlled acceleration can allow the motor to increase speed gradually.

This is useful in mining, ports, bulk-material handling, cement, aggregates, and large manufacturing plants.

19. Application — Mills and Crushers

Mills and crushers can represent some of the more demanding high-power drive applications.

The mechanical load can change considerably during operation.

The drive can provide controlled starting and running operation while allowing the motor to be incorporated into the plant automation system.

Typical applications include:

• Ore crushers
• Stone crushers
• Grinding mills
• Raw-material mills
• Cement mills
• Mineral-processing equipment
• Aggregate-processing equipment

20. Application — Process Industries

Chemical, petrochemical, paper, pulp, and other process industries often require large motors to operate continuously.

Typical equipment includes:

• Large process pumps
• Fans
• Compressors
• Circulation systems
• Cooling systems
• Material-handling systems
• Large auxiliary machinery

The ability to integrate the drive with a plant automation system is particularly useful in continuous-process environments.

21. Application — Industrial HVAC

Large factories and industrial facilities can use very large fans and pumps.

The drive can control:

• Supply-air fans
• Exhaust fans
• Cooling-water pumps
• Chilled-water pumps
• Industrial ventilation
• Tunnel ventilation
• Process-air systems

Speed can be adjusted according to pressure, airflow, temperature, or production requirements.

22. Main Advantage — Very High Power Capacity

The main advantage of the 20G1G3F920LNDNNNNN is its very high power capacity.

With approximately 920 A Normal Duty and 900 kW Normal Duty, it belongs to the high-power end of the low-voltage industrial AC-drive category.

The Light Duty capability reaches approximately 1,000 kW at 1,074 A.

This allows the drive to be used with motors approaching the megawatt range.

23. Main Advantage — Low-Harmonic Operation

The PowerFlex 755TL architecture is designed for low-harmonic operation.

For large industrial facilities, this can be an important consideration.

Large drives can otherwise contribute significant harmonic current to the electrical network.

Improved input-current characteristics can help the overall plant electrical system meet its power-quality design requirements.

The actual harmonic performance of a complete installation still depends on the electrical system, transformer impedance, cabling, operating point, configuration, and other equipment connected to the same supply.

24. Main Advantage — 690 V System

The 690 V system architecture makes the drive suitable for large industrial motors.

For very high motor power, a higher voltage level helps reduce the current required for a given power level.

This can make large motor distribution systems more practical in terms of cable sizing and electrical equipment selection.

25. Main Advantage — Variable-Speed Control

The ability to change motor speed is valuable for many industrial processes.

A pump can operate according to required flow.

A fan can operate according to required airflow.

A conveyor can operate according to production speed.

A compressor can respond to process demand.

A large rotating machine can therefore become an active part of the control system.

26. Main Advantage — Controlled Acceleration

Large mechanical systems often have high inertia.

Controlled acceleration allows the motor to reach operating speed gradually.

This can reduce sudden torque transmission through the mechanical drivetrain.

It is especially useful for:

• Long conveyors
• Large fans
• Pumps
• Mills
• Crushers
• Heavy rotating equipment

27. Main Advantage — Controlled Deceleration

Controlled deceleration is equally important in high-inertia applications.

The motor can be slowed according to a programmed profile rather than stopping abruptly.

This can be useful for conveyors, large fans, pumps, and other rotating machines where uncontrolled stopping could affect the mechanical system or production process.

28. Main Advantage — Automation Integration

The PowerFlex 755 platform is designed to integrate into industrial automation systems.

A typical system may include:

PLC → Drive Command → 20G1G3F920LNDNNNNN → Motor

The drive can exchange information such as:

• Start command
• Stop command
• Speed reference
• Speed feedback
• Motor current
• Drive status
• Fault status
• Alarm information
• Torque information
• Process feedback

29. Main Advantage — Suitable for Centralized Drive Rooms

A high-power drive is normally easier to manage when installed in a dedicated electrical room.

The floor-mounted cabinet format allows high-power equipment to be organized alongside other electrical equipment.

This can simplify:

• Cable management
• Maintenance
• Cooling
• Electrical isolation
• Inspection
• Troubleshooting
• System expansion

30. Main Advantage — Broad Industrial Application

The same basic drive platform can be applied across many industries.

Typical sectors include:

• Mining
• Cement
• Steel
• Metals
• Water
• Wastewater
• Chemical processing
• Petrochemical processing
• Manufacturing
• Material handling
• Pulp and paper
• Industrial HVAC
• Utilities
• Large pumping stations

31. Dimensions and Weight

For preliminary engineering planning, the 20G1G3F920LNDNNNNN should be treated as a large cabinet assembly rather than a compact inverter.

A practical preliminary cabinet envelope is approximately:

2300 mm H × 1400 mm W × 1400 mm D

A preliminary planning weight of approximately:

500–700 kg

can be used for early layout and handling calculations.

These figures are intended for preliminary planning only.

The final physical dimensions and weight depend on the exact cabinet configuration and installed options.

For a project involving transportation, lifting, floor loading, foundation design, shipping, or enclosure layout, the final mechanical drawing for the actual catalog configuration should be used.

32. Installation Requirements

Installation Parameter	Recommended Consideration
Supply Voltage	690 V AC class
Supply Phase	Three Phase
Motor Voltage	Match actual motor nameplate
Motor Current	Must match selected duty
Motor Power	Check against applicable duty rating
Motor Frequency	Confirm 50/60 Hz or required frequency
Motor Speed	Verify rated and maximum speed
Load Type	Pump, fan, conveyor, compressor, mill, crusher, etc.
Overload	Evaluate application-specific overload
Starting Torque	Confirm machine requirement
Cooling	Provide adequate room ventilation
Ambient Temperature	Confirm within applicable limits
Dust	Keep cooling system clean
Humidity	Avoid excessive moisture
Cable Routing	Provide suitable power and control cable paths
Grounding	Follow plant electrical design
Maintenance Space	Provide sufficient access
Cabinet Floor	Confirm loading and anchoring
Lifting	Verify cabinet weight and lifting method
Communication	Confirm required automation interface

33. Electrical System Considerations

A drive of this capacity should be evaluated as part of the complete electrical system.

The project engineer should consider:

• Transformer capacity
• Transformer impedance
• Available fault current
• Incoming switchgear
• Short-circuit protection
• Cable capacity
• Grounding
• Harmonic performance
• Motor cable length
• Motor insulation
• Power quality
• Adjacent large loads
• Generator operation where applicable
• Backup power requirements

The drive rating alone does not determine the suitability of the entire electrical installation.

34. Motor Selection Considerations

The motor should be evaluated using actual nameplate data.

Important information includes:

Motor Parameter	Why It Matters
Rated Voltage	Must match the drive and motor system
Rated Current	Primary drive sizing parameter
Rated Power	Establishes the motor’s power class
Rated Frequency	Determines base operating frequency
Rated Speed	Determines operating range
Power Factor	Important for electrical loading
Efficiency	Affects operating performance
Starting Torque	Important for heavy loads
Maximum Speed	Important for overspeed protection
Insulation System	Important for inverter-fed motors
Duty Cycle	Determines thermal requirements
Feedback	Determines whether encoder feedback is needed

35. Maintenance Considerations

A large air-cooled drive should have a planned maintenance program.

Cooling fans should be inspected for abnormal noise, vibration, contamination, and airflow problems.

Cabinet ventilation openings should remain unobstructed.

Power connections should be inspected according to the plant’s maintenance procedures.

The electrical room should be kept clean enough to prevent excessive contamination of the cooling system.

Drive alarms and fault history should also be reviewed regularly.

For a drive controlling a critical production motor, maintenance personnel should monitor changes in operating current, temperature, fault frequency, and other available diagnostic information.

36. Related Models — Same Series

The following five models are particularly relevant when comparing the 920 A class with neighboring PowerFlex 755TL 690 V configurations.

Model	Voltage	Normal Duty	Light Duty	Heavy Duty	Typical Application
20G1G3F650LNDNNNNN	690 V	650 A / 630 kW	735 A / 710 kW	565 A / 560 kW	Large pumps, fans, conveyors
20G1G3F735LNDNNNNN	690 V	735 A / 710 kW	820 A / 800 kW	650 A / 630 kW	Process machinery
20G1G3F820LNDNNNNN	690 V	820 A / 800 kW	920 A / 900 kW	735 A / 710 kW	Large industrial equipment
20G1G3F920LNDNNNNN	690 V	920 A / 900 kW	1074 A / 1000 kW	820 A / 800 kW	Very large process machinery
20G1G4F1K0LNDNNNNN	690 V	Approx. 1030 A / 1000 kW	Approx. 1150 A / 1100 kW	Approx. 920 A / 900 kW	Higher-power industrial systems

The first four models form a particularly clear progression within the 690 V air-cooled low-harmonic range. The 920 A class is the point where the Normal Duty rating reaches approximately 900 kW, while the Light Duty rating reaches approximately 1 MW.

37. Same-Series Power Comparison

Model	ND Current	ND Power	LD Current	LD Power	HD Current	HD Power
20G1G3F650LNDNNNNN	650 A	630 kW	735 A	710 kW	565 A	560 kW
20G1G3F735LNDNNNNN	735 A	710 kW	820 A	800 kW	650 A	630 kW
20G1G3F820LNDNNNNN	820 A	800 kW	920 A	900 kW	735 A	710 kW
20G1G3F920LNDNNNNN	920 A	900 kW	1074 A	1000 kW	820 A	800 kW
20G1G4F1K0LNDNNNNN	1030 A	1000 kW	1150 A	1100 kW	920 A	900 kW

This table illustrates how the drive rating increases as the motor current requirement increases.

For a motor around 800 kW, for example, the 820 A class and 920 A class may need to be evaluated according to the actual motor current and duty.

For a motor approaching 900 kW, the 920 A Normal Duty class becomes particularly relevant.

38. Five Same-Brand Popular / Related Models

Model	Product Series	Voltage	Current / Power Class	Cooling	Typical Application
20G1G3F505LNDNNNNN	PowerFlex 755TL	690 V	505 A ND / 500 kW	Air Cooled	Pumps, fans, process machinery
20G1G3F650LNDNNNNN	PowerFlex 755TL	690 V	650 A ND / 630 kW	Air Cooled	Large pumps, fans, conveyors
20G1G3F735LNDNNNNN	PowerFlex 755TL	690 V	735 A ND / 710 kW	Air Cooled	Heavy industrial equipment
20G1G3F820LNDNNNNN	PowerFlex 755TL	690 V	820 A ND / 800 kW	Air Cooled	Large process machinery
20G1G3F920LNDNNNNN	PowerFlex 755TL	690 V	920 A ND / 900 kW	Air Cooled	Very large industrial systems

These models are useful reference points for large-motor projects because they cover adjacent power classes within the same 690 V high-power family.

The 505 A, 650 A, 735 A, 820 A, and 920 A classes provide a practical progression for motor selection.

39. Broader Same-Brand Model Comparison

Model	Product Family	Typical Voltage Class	Approx. Power Class	Main Application
20G1G3F505LNDNNNNN	PowerFlex 755	690 V	500 kW ND	Large pumps and fans
20G1G3F650LNDNNNNN	PowerFlex 755	690 V	630 kW ND	Large industrial machinery
20G1G3F820LNDNNNNN	PowerFlex 755	690 V	800 kW ND	Heavy process equipment
20G1G3F920LNDNNNNN	PowerFlex 755	690 V	900 kW ND	Very large industrial machinery
20G1G4F1K0LNDNNNNN	PowerFlex 755	690 V	1000 kW ND	Extremely large process systems

This group is useful when planning a large industrial motor-control system because the models occupy neighboring high-power classes.

The exact choice should be based on motor current and duty rather than simply selecting the drive whose nominal kW is closest to the motor.

40. Typical System Architecture

A typical installation can be represented as:

Three-Phase 690 V AC Supply

↓

Main Switchgear / Protection

↓

20G1G3F920LNDNNNNN

↓

Large Three-Phase AC Motor

↓

Pump / Fan / Compressor / Conveyor / Mill / Process Machine

The control architecture can operate in parallel:

PLC / Process Controller

↓

Drive Command

↓

Speed / Torque Control

↓

Motor

Feedback can include:

• Motor speed
• Motor current
• Process pressure
• Process flow
• Temperature
• Drive status
• Fault status
• Alarm status
• Torque feedback
• Speed reference

41. Advantages in Continuous-Process Plants

Continuous-process industries place special importance on stable motor operation.

A large pump or fan may operate for many hours without interruption.

A drive can provide a controlled operating point and allow the process-control system to adjust motor speed as conditions change.

This is useful in:

• Water plants
• Cement plants
• Chemical plants
• Steel plants
• Mining facilities
• Pulp and paper plants
• Large manufacturing facilities

42. Advantages for High-Inertia Loads

High-inertia loads can be difficult to start and stop smoothly.

The drive can provide a programmed acceleration and deceleration profile.

This can help reduce mechanical shock and improve control of the overall machine.

Examples include:

• Long conveyors
• Large fans
• Grinding mills
• Large pumps
• Flywheel-type machinery
• Heavy rotating equipment

43. Advantages for Electrical System Design

The low-harmonic architecture is one of the most significant characteristics of this particular drive family.

For a large facility containing multiple high-power drives, harmonic current can become a major electrical design issue.

A low-harmonic drive architecture can help reduce the impact of drive operation on the incoming electrical system.

However, plant-level power-quality performance should always be evaluated as a complete system.

Transformer impedance, supply stiffness, other nonlinear loads, cable arrangement, drive operating point, and the number of installed drives can all affect actual results.

44. Advantages for Large Motor Replacement Projects

The 20G1G3F920LNDNNNNN can also be considered in modernization projects where an existing fixed-speed large motor is being converted to variable-speed operation.

Potential benefits include:

• Adjustable motor speed
• Controlled starting
• Controlled stopping
• Process regulation
• Improved automation integration
• Motor operating-status feedback
• Reduced dependence on mechanical throttling
• Better process flexibility

The existing motor, transformer, switchgear, cables, mechanical equipment, and process-control system must all be evaluated before conversion.

45. Product Selection Checklist

Item	Selection Question
Motor Power	Is the motor within the selected duty rating?
Motor Current	Is the full-load current below the applicable drive current rating?
Voltage	Is the motor compatible with the 690 V system?
Duty	Is the application Light, Normal, or Heavy Duty?
Starting Torque	Does the machine require high starting torque?
Speed Range	What is the required minimum and maximum speed?
Feedback	Is encoder or other feedback required?
Harmonics	Does the plant require low-harmonic operation?
Environment	Is the electrical room suitable for air-cooled equipment?
Cooling	Is sufficient ventilation available?
Cabinet	Is sufficient floor space available?
Weight	Can the floor and lifting equipment support the drive?
Cabling	Are suitable incoming and motor cables available?
Communication	What PLC or industrial network is required?
Maintenance	Is adequate service access available?
Process	Can the machine operate safely across the full speed range?

46. Model Identification Summary

Item	Specification
Model	20G1G3F920LNDNNNNN
Brand	Allen-Bradley
Product Family	PowerFlex
Product Series	PowerFlex 755T
Sub-Series	PowerFlex 755TL
Product Type	Air-Cooled Low-Harmonic AC Drive
Voltage	690 V AC
Phase	Three Phase
Normal Duty	920 A / 900 kW
Light Duty	1074 A / 1000 kW
Heavy Duty	820 A / 800 kW
Cooling	Forced Air
Mounting	Floor Mount
Enclosure	Type 1 / IP21
Main Function	High-Power Variable-Speed Motor Control
Main Applications	Pumps, Fans, Compressors, Conveyors, Mills, Crushers
Typical Industries	Mining, Cement, Steel, Water, Chemical, Manufacturing
Approx. Dimensions	2300 × 1400 × 1400 mm H × W × D*
Approx. Weight	500–700 kg*

*Approximate planning values only. Actual cabinet dimensions and weight depend on the final configuration.

47. Overall Product Advantages

The 20G1G3F920LNDNNNNN is positioned for applications where conventional low-power AC drives are no longer sufficient.

Its main strengths are:

• Approximately 900 kW Normal Duty capacity
• Approximately 1 MW Light Duty capacity
• 920 A Normal Duty current class
• 690 V three-phase architecture
• Low-harmonic drive technology
• Air-cooled construction
• Floor-mounted cabinet format
• Variable-speed motor control
• Torque control capability
• Controlled acceleration
• Controlled deceleration
• Large industrial motor compatibility
• Industrial automation integration
• Suitability for centralized drive rooms
• Broad application range
• Strong suitability for continuous-process applications

48. Final Product Description

The Allen-Bradley 20G1G3F920LNDNNNNN is a high-power PowerFlex 755TL air-cooled low-harmonic AC drive designed for large 690 V three-phase motor applications.

Its 920 A Normal Duty rating corresponds to approximately 900 kW, while the Light Duty rating reaches approximately 1,000 kW at 1,074 A and the Heavy Duty rating is approximately 800 kW at 820 A.

This places the model in a class intended for very large industrial motors and demanding continuous-process equipment.

Typical applications include large pumps, industrial fans, compressors, conveyors, crushers, grinding mills, mining equipment, cement machinery, steel-processing equipment, water-treatment systems, and large process machinery.

The 690 V architecture is suitable for high-power motor systems, while the air-cooled floor-mounted construction is appropriate for dedicated electrical rooms and industrial drive areas.

The PowerFlex 755TL low-harmonic architecture is especially relevant to installations where the electrical characteristics of large AC drives need to be considered as part of the overall plant power system.

The drive can be integrated with PLCs, HMIs, process controllers, industrial communication networks, feedback devices, and other automation equipment.

For a large pump, the drive can regulate speed according to pressure or flow.

For a fan, it can adjust speed according to airflow or process demand.

For a conveyor, it can provide controlled acceleration and deceleration.

For a compressor, it can regulate motor operation according to process requirements.

For a mill or crusher, it can provide controlled motor operation for a demanding mechanical load.

The neighboring 650 A, 735 A, 820 A, and 1,030 A-class configurations provide useful alternatives when the motor current or application duty changes.

For final engineering selection, the most important information is the actual motor nameplate current, voltage, power, speed, duty cycle, overload requirement, starting torque, speed range, environmental conditions, cooling arrangement, harmonic requirements, and automation architecture.

In practical terms, the 20G1G3F920LNDNNNNN can be described as a 690 V, three-phase, 920 A Normal Duty, approximately 900 kW, air-cooled, floor-mounted, low-harmonic PowerFlex 755TL drive for very large industrial motor-control applications.