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20G1F4D1K0LNDNNNNN – PowerFlex 755 High-Power AC Drive

Product Overview

The 20G1F4D1K0LNDNNNNN is a high-power industrial AC drive in the PowerFlex 755 series. It is an air-cooled packaged-drive configuration intended for large motor-control applications where high current capacity, reliable variable-speed operation, controlled acceleration and deceleration, and integration with an industrial automation system are required.

The model is designed for large industrial installations rather than small machine applications. Its high-power configuration makes it suitable for large conveyors, pumps, fans, compressors, process equipment, material-handling machinery, and other large rotating loads.

The D1K0 designation places this model in the approximately 1,000 A class of the PowerFlex 755 family. The exact motor power that can be served depends on the actual motor voltage, motor current, duty cycle, overload requirement, operating speed, ambient conditions, and the complete drive configuration.

The LNDNNNNN configuration is associated with an air-cooled packaged-drive arrangement. This type of equipment is normally installed as a large floor-mounted electrical cabinet or packaged power-conversion assembly, with dedicated consideration given to ventilation, cable routing, grounding, maintenance access, and mechanical support.

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Product Information

Item	Specification
Model	20G1F4D1K0LNDNNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	High-Power AC Drive
Configuration	Air-Cooled Packaged Drive
Drive Family	PowerFlex 755
Voltage Class	400 V AC class
Input	3-Phase AC
Current Class	Approximately 1,000 A
Cooling	Forced-Air / Air-Cooled
Installation	Floor-Mounted Cabinet
Application Level	Large Industrial Motor Control
Motor Type	Large Industrial AC Motor
Control Method	Adjustable-Frequency AC Motor Control
Operating Mode	Variable-Speed Operation
Package Style	Industrial Packaged Drive
Typical Load	High-Power Rotating Machinery
Intended Environment	Industrial Electrical Room / Equipment Area
Approx. Dimensions	2477 × 800 × 800 mm
Dimension Format	Height × Width × Depth
Approx. Weight	650–750 kg
Mechanical Construction	Large Cabinet-Type Assembly
Service Requirement	Adequate Maintenance Clearance
Cooling Requirement	Dedicated Ventilation / Airflow
Typical Application	Conveyors, Pumps, Fans, Compressors, Process Machinery

The dimensions and weight shown above should be treated as engineering planning values. A high-power packaged drive can change in physical size and shipping weight depending on cabinet options, disconnect equipment, input/output arrangement, auxiliary components, cooling configuration, and other selected options.

For transportation, lifting, foundation loading, and final panel-layout work, the final configured equipment drawing should always be used.

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Detailed Technical Parameters

Parameter	20G1F4D1K0LNDNNNNN
Catalog Number	20G1F4D1K0LNDNNNNN
Brand	Allen-Bradley
Product Series	PowerFlex 755
Product Category	Industrial AC Variable-Frequency Drive
Drive Configuration	Air-Cooled Packaged Drive
Input Voltage Class	400 V AC
Input Phase	3 Phase
Current Rating Class	Approx. 1,000 A
Cooling Method	Forced-Air Cooling
Cooling Type	Air-Cooled
Mounting	Floor Mount
Cabinet Type	Packaged Industrial Cabinet
Motor Control	Variable-Frequency AC Motor Control
Speed Control	Adjustable-Speed
Acceleration Control	Programmable
Deceleration Control	Programmable
Torque Control	Supported through drive control functions
Industrial Integration	Suitable for automation-system integration
Typical Motor	Large Industrial AC Motor
Typical Duty	Continuous Industrial Operation
Main Application	High-Power Motor Control
Approx. Height	2477 mm
Approx. Width	800 mm
Approx. Depth	800 mm
Approx. Dimensions	2477 × 800 × 800 mm
Approx. Weight	650–750 kg
Installation Location	Industrial Electrical Room
Cooling Clearance	Required
Maintenance Access	Required
Typical Loads	Conveyors, Pumps, Fans, Compressors, Process Machinery
Application Class	Heavy-Duty Industrial

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Product Introduction

The 20G1F4D1K0LNDNNNNN is intended for high-capacity motor applications where a conventional compact variable-frequency drive is not sufficient.

A motor in this application range can represent a major part of a plant’s electrical load. The drive therefore has to be treated as an important part of the complete electrical system.

Rather than simply turning a motor on and off, the drive controls the electrical power supplied to the motor and allows the motor to operate according to a programmed speed and operating profile.

This is particularly useful for machinery with large inertia, variable production requirements, controlled acceleration requirements, or frequent speed changes.

For example, a large conveyor may need a slow startup to reduce mechanical stress on the belt and gearbox. A large pump may need different speeds according to process flow. A large fan may need to respond to ventilation demand. A compressor may need controlled acceleration and speed regulation.

In each of these cases, the drive acts as a central interface between the electrical supply, the motor, the mechanical load, and the automation system.

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High-Power Architecture

The approximately 1,000 A class of the 20G1F4D1K0LNDNNNNN places it among the larger PowerFlex 755 configurations.

This level of current capacity is intended for applications involving large industrial motors.

The actual motor power associated with a 1,000 A class drive is not determined by current alone. Motor voltage has a direct effect on available motor power, and the final selection must also consider motor duty and overload requirements.

For this reason, engineering selection should normally begin with the motor nameplate rather than simply selecting a drive according to horsepower.

Important motor data includes:

• Rated voltage
• Rated current
• Rated frequency
• Rated speed
• Rated power
• Power factor
• Efficiency
• Service factor
• Overload requirement
• Cooling method
• Operating speed range
• Load torque characteristics

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Air-Cooled Packaged Configuration

The LNDNNNNN configuration is identified as an air-cooled packaged drive arrangement.

For a high-power drive, thermal management is a major engineering consideration.

Power semiconductor devices, bus components, reactors, contactors, control electronics, and other electrical equipment generate heat during normal operation.

The cooling system therefore has to continuously remove heat from the equipment.

The installation area should provide adequate airflow and should prevent hot exhaust air from being recirculated into the cooling intake.

The equipment room should also be designed so that ambient temperature remains within the permitted operating range.

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Variable-Speed Motor Control

One of the primary functions of the 20G1F4D1K0LNDNNN is adjustable-speed motor operation.

A conventional motor connected directly to a fixed-frequency supply normally operates near a fixed speed.

A variable-frequency drive changes the electrical operating conditions supplied to the motor, allowing motor speed to be adjusted.

This provides much more flexibility for industrial processes.

A pump can operate at a speed corresponding to actual flow demand.

A fan can change speed according to airflow requirements.

A conveyor can change belt speed according to production throughput.

A process machine can synchronize its motor speed with another section of the production line.

This makes the drive an important process-control component rather than simply a motor starter.

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Controlled Acceleration

Large motors can create substantial mechanical stress when started.

The mechanical load may include:

• Heavy belts
• Large gearboxes
• Long shafts
• Large fans
• Pump impellers
• Rotating drums
• Crushers
• Large process equipment

A controlled acceleration profile allows the motor to gradually reach operating speed.

This can help reduce sudden mechanical loading on the connected equipment.

Controlled acceleration can also provide a more predictable startup sequence for the production process.

For large conveyors, this is particularly important because the belt may be extremely long and heavy.

For fans and blowers, the rotating assembly can contain substantial inertia.

For pumps, controlled acceleration can reduce abrupt changes in system conditions.

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Controlled Deceleration

The same principle applies when stopping the motor.

A large rotating machine can contain considerable kinetic energy.

If the machine simply coasts to a stop, stopping time may be long and difficult to control.

A drive can provide a programmed deceleration profile.

This can improve process control and provide a more predictable machine stopping sequence.

The appropriate deceleration strategy must be selected according to the machine inertia, required stopping time, motor characteristics, and complete braking configuration.

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Industrial Automation Integration

The PowerFlex 755 family is designed to operate as part of a larger industrial automation system.

The 20G1F4D1K0LNDNNNNN can therefore be considered for installations where the drive needs to communicate with or respond to a supervisory control architecture.

A typical system may include:

• PLC controllers
• HMIs
• Industrial communication networks
• Process instrumentation
• Motor-control equipment
• Safety systems
• Production monitoring
• Supervisory control systems

The drive can receive operating commands and provide status information as part of the machine-control sequence.

This is especially useful in large production facilities where multiple motors must operate in a coordinated manner.

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Product Applications

1. Mining Conveyors

Mining conveyors can require extremely large motors.

A conveyor system may include long belt sections, heavy material loading, substantial belt mass, and large gearbox assemblies.

The 20G1F4D1K0LNDNNNNN is suitable for consideration in such high-power conveyor applications where the motor current and duty requirements fall within the drive’s configuration.

Typical applications include:

• Ore conveyors
• Coal conveyors
• Bulk-material conveyors
• Transfer conveyors
• Crusher-feed conveyors
• Stockpile conveyors

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2. Heavy Material Handling

Large material-handling systems can involve high motor power and frequent changes in operating conditions.

Applications can include:

• Bulk-material transfer
• Industrial conveyors
• Heavy feeders
• Processing lines
• Large lifting machinery
• Transfer systems

Variable-speed control can help coordinate material flow between different sections of a plant.

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3. Large Pumps

Large industrial pumps can represent a substantial portion of a plant’s electrical consumption.

A variable-frequency drive allows pump speed to be adjusted according to process requirements.

Applications include:

• Cooling-water circulation
• Industrial water systems
• Water treatment
• Process fluid transfer
• Utility pumping
• Large-scale circulation systems

The actual suitability depends on the pump curve, motor rating, minimum-flow requirement, process pressure, and required operating speed range.

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4. Large Fans

Large fans and blowers can have substantial rotating inertia.

The drive can provide controlled acceleration and adjustable operating speed.

Typical applications include:

• Industrial ventilation
• Furnace fans
• Process exhaust
• Combustion-air systems
• Cement-plant ventilation
• Steel-processing ventilation
• Mining ventilation

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5. Compressors

Large compressors can require considerable motor current and starting torque.

A properly selected high-power drive can provide controlled acceleration and variable-speed operation.

Potential applications include:

• Industrial air systems
• Process gas equipment
• Manufacturing plants
• Utility compressors
• Large process compressors

Compressor manufacturers’ speed limits and operating envelopes must be considered when applying variable-frequency control.

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6. Cement Plants

Cement plants contain numerous large motor applications.

Potential uses include:

• Raw-material handling
• Large fans
• Crushers
• Pumps
• Conveyors
• Material-transfer systems
• Process machinery

The drive’s high-power capacity can make it appropriate for major rotating equipment within these installations.

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7. Steel Plants

Steel production requires many large motor-driven systems.

Applications may include:

• Large conveyors
• Fans
• Pumps
• Cooling systems
• Material handling
• Processing machinery
• Large production-line equipment

In these environments, coordinated motor control can be important for maintaining production stability.

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8. Large Process Machinery

Large process equipment often requires controlled speed rather than fixed-speed motor operation.

The drive can be incorporated into the plant control system so that motor speed is adjusted according to the process sequence.

Potential applications include:

• Mixing systems
• Processing machines
• Large rotating equipment
• Industrial production lines
• Continuous-process machinery

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Main Product Advantages

1. High Current Capacity

The approximately 1,000 A class makes this model suitable for very large industrial motors.

This is one of the main reasons for selecting a drive of this size.

It provides substantially more capacity than small and medium industrial drives and is intended for large-scale electrical installations.

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2. Large-Motor Application Capability

The drive is intended for large AC motors used in heavy industrial machinery.

It can therefore be considered for applications where the motor has high continuous current requirements or substantial starting and operating torque.

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3. Controlled Motor Starting

Controlled acceleration can reduce mechanical shock during startup.

This is useful for:

• Conveyors
• Fans
• Pumps
• Compressors
• Crushers
• Large process machines

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4. Adjustable Speed

The drive allows motor speed to be matched to actual process requirements.

This can improve operating flexibility and provide more precise control of production equipment.

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5. Air-Cooled Design

Forced-air cooling provides a practical thermal-management method for a high-power packaged drive.

Proper ventilation and cooling maintenance are essential for reliable operation.

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6. Packaged Industrial Construction

A packaged drive is designed as a larger industrial electrical assembly rather than as a small standalone inverter.

This approach can simplify integration into a dedicated electrical room or motor-control installation.

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7. Automation Integration

The PowerFlex 755 platform can be integrated into industrial automation systems.

This allows motor operation to be coordinated with PLCs, HMIs, process controllers, and other plant equipment.

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8. Suitable for Heavy-Duty Machinery

The combination of high current, adjustable speed, controlled acceleration, and industrial automation integration makes the drive appropriate for heavy-duty machinery.

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Installation Considerations

The 20G1F4D1K0LNDNNNNN should be treated as a major electrical installation.

Before installation, the project should evaluate the following areas.

Incoming Power

The incoming power system must be compatible with the drive.

The engineer should evaluate:

• Transformer capacity
• Incoming switchgear
• Circuit protection
• Disconnect equipment
• Grounding
• Cable sizing
• Short-circuit conditions
• Electrical distribution capacity

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Motor Cable System

The motor cable system must be selected according to the actual motor current and installation requirements.

Cable routing, grounding, shielding where required, termination, and physical separation from sensitive control wiring should all be considered.

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Motor Compatibility

The motor nameplate should be checked before final drive selection.

At minimum, verify:

Motor Parameter	Required Check
Rated Voltage	Must match drive application
Rated Current	Must fall within drive capability
Rated Frequency	Must match application
Rated Speed	Used for motor-control setup
Rated Power	Used for system sizing
Power Factor	Required for motor model data
Overload	Must match application duty
Cooling	Must support intended speed range
Insulation	Must be suitable for drive operation
Load Torque	Must be within drive capability

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Mechanical Installation

A high-power packaged drive can weigh several hundred kilograms.

The approximate weight of 650–750 kg should therefore be considered when planning:

• Floor loading
• Foundation design
• Cabinet anchoring
• Transportation
• Lifting
• Rigging
• Equipment-room access
• Doorway clearance
• Maintenance access

The actual shipping weight should always be taken from the final configured equipment documentation.

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Cooling Requirements

The air-cooled design makes ventilation an important part of the installation.

The drive should have sufficient free airflow around the cooling system.

The installation should avoid:

• Blocked air inlets
• Restricted exhaust paths
• Hot-air recirculation
• Excessive ambient temperature
• Heavy dust accumulation
• Contaminated cooling passages

Cooling fans and ventilation paths should be inspected as part of regular maintenance.

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Maintenance Recommendations

Maintenance Area	Recommended Inspection
Cooling Fans	Check rotation, noise and airflow
Air Filters	Inspect and clean or replace when required
Airflow Path	Check for blockage
Power Terminals	Inspect for overheating or looseness
Control Wiring	Check terminals and wiring condition
Grounding	Verify grounding connections
Cabinet	Inspect for dust and foreign material
Electrical Components	Check for abnormal temperature
Fault History	Review recurring alarms and trips
Ventilation	Verify room airflow
Mechanical Condition	Check vibration and unusual noise
Connections	Inspect for signs of thermal stress

Regular maintenance is particularly important for large industrial drives because cooling problems and electrical connection problems can become more serious as operating current increases.

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Recommended Related Models – Same Series

The following models are closely related PowerFlex 755 configurations and are useful for comparison around the high-current section of the product family. The exact electrical characteristics depend on the individual catalog configuration.

Related Model	Series	Approx. Current Class	Configuration	Typical Application
20G1F4C920LNDNNNNN	PowerFlex 755	920 A class	Air-Cooled	Large pumps, fans and conveyors
20G1F4D1K0LNDNNNNN	PowerFlex 755	1,000 A class	Air-Cooled Packaged	Very large industrial motors
20G1F4D1K3LNDNNNNN	PowerFlex 755	1,300 A class	Air-Cooled Packaged	High-power process machinery
20G1F4D1K4LNDNNNNN	PowerFlex 755	1,400 A class	Air-Cooled	Very high-power industrial applications
20G1F4D1K6LNDNNNNN	PowerFlex 755	1,600 A class	Air-Cooled	Extra-high-power motor systems

These model numbers appear within the PowerFlex 755 product family and provide useful comparison points when a project needs a different current range.

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Five Related High-Power Models from the Same Brand

Model	Product Family	Current Class	Cooling / Configuration	Typical Use
20G1F4C750LNDNNNNN	PowerFlex 755	750 A class	Air-Cooled Packaged	Large conveyors and pumps
20G1F4C770LNDNNNNN	PowerFlex 755	770 A class	Air-Cooled Packaged	Heavy-duty motor control
20G1F4C920LNDNNNNN	PowerFlex 755	920 A class	Air-Cooled Packaged	Large industrial machinery
20G1F4D1K0LNDNNNNN	PowerFlex 755	1,000 A class	Air-Cooled Packaged	Very large motors
20G1F4D1K3LNDNNNNN	PowerFlex 755	1,300 A class	Air-Cooled Packaged	Extra-high-power machinery

These models are particularly relevant when comparing large PowerFlex 755 installations with different motor current requirements.

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Model Comparison

Model	Current Class	Voltage Class	Cooling	General Application
20G1F4C750LNDNNNNN	750 A class	400 V AC class	Air-Cooled	Large industrial motor control
20G1F4C770LNDNNNNN	770 A class	400 V AC class	Air-Cooled	Heavy-duty machinery
20G1F4C920LNDNNNNN	920 A class	400 V AC class	Air-Cooled	Very large motor systems
20G1F4D1K0LNDNNNNN	1,000 A class	400 V AC class	Air-Cooled	High-power industrial systems
20G1F4D1K3LNDNNNNN	1,300 A class	400 V AC class	Air-Cooled	Extra-high-power applications

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Why the 20G1F4D1K0LNDNNNNN Is Used in Large Industrial Systems

The main reason for selecting a drive in this current range is the scale of the connected motor.

Large industrial motors cannot be treated in the same way as small machine motors.

The electrical distribution system is larger, the motor cables are larger, the cooling requirements are more significant, and the mechanical load can contain a considerable amount of stored energy.

The drive therefore has to provide enough electrical capacity while maintaining appropriate control over motor acceleration, speed, and stopping.

The 20G1F4D1K0LNDNNNNN is designed for this type of high-power industrial environment.

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Typical System Configuration

A typical installation may contain:

Incoming AC Supply

↓

Main Switchgear

↓

Protection / Disconnect Equipment

↓

20G1F4D1K0LNDNNNNN

↓

Large Industrial AC Motor

↓

Gearbox / Coupling / Mechanical Load

The drive may also be connected to a PLC or other automation controller.

A typical control architecture may therefore include:

PLC / Control System

↓

Industrial Communication

↓

PowerFlex 755 Drive

↓

Motor

↓

Mechanical Equipment

This arrangement allows motor speed and operating conditions to be coordinated with the complete production process.

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Application Selection Guide

Application	Main Requirement	Reason for Considering This Drive
Large Conveyor	High starting and running current	High-current motor control
Mining Conveyor	Heavy mechanical load	Large motor capacity
Large Pump	Variable process flow	Adjustable speed
Large Fan	High inertia	Controlled acceleration
Compressor	High starting torque	High-power motor control
Crusher	Heavy mechanical load	High current and controlled startup
Cement Equipment	Continuous industrial duty	Large motor application
Steel Equipment	Coordinated motor operation	Industrial automation integration
Material Handling	Controlled acceleration	Reduced mechanical shock
Process Machinery	Variable speed	Process-oriented motor control

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Final Technical Specification

Specification	Details
Model	20G1F4D1K0LNDNNNNN
Brand	Allen-Bradley
Series	PowerFlex 755
Product Type	High-Power AC Drive
Configuration	Air-Cooled Packaged Drive
Voltage Class	400 V AC
Input	3 Phase AC
Current Class	Approximately 1,000 A
Cooling	Forced-Air
Mounting	Floor-Mounted Cabinet
Drive Architecture	High-Power Industrial AC Drive
Motor Control	Variable-Frequency Motor Control
Speed Control	Adjustable
Acceleration	Programmable
Deceleration	Programmable
Typical Motor	Large Industrial AC Motor
Typical Loads	Conveyors, Pumps, Fans, Compressors
Process Applications	Mining, Cement, Steel, Manufacturing, Material Handling
Approx. Height	2477 mm
Approx. Width	800 mm
Approx. Depth	800 mm
Approx. Dimensions	2477 × 800 × 800 mm
Approx. Weight	650–750 kg
Installation Environment	Industrial Electrical Room
Cooling Requirement	Adequate Forced-Air Ventilation
Maintenance	Periodic Electrical and Cooling-System Inspection
Main Advantage	High-Capacity Industrial Motor Control

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Conclusion

The 20G1F4D1K0LNDNNNNN is a large-capacity PowerFlex 755 AC drive intended for industrial motor-control applications requiring approximately 1,000 A class current capacity.

Its air-cooled packaged configuration is suited to large electrical installations where the drive, motor, mechanical load, cooling system, and automation equipment are engineered as one complete system.

The drive is well suited for consideration in large conveyors, mining equipment, cement machinery, steel-processing systems, large pumps, industrial fans, compressors, material-handling equipment, and other high-power rotating machinery.

The principal advantages are its high current capacity, adjustable-speed motor control, controlled acceleration and deceleration, industrial packaged construction, forced-air cooling, and ability to participate in a larger automation architecture.

For large motors, correct application engineering is particularly important. The motor’s rated current, voltage, duty cycle, overload requirement, speed range, load torque, ambient temperature, cooling conditions, and incoming electrical system should all be checked before final selection.

The approximate 2477 × 800 × 800 mm physical size and 650–750 kg weight provided above are suitable for preliminary engineering and space planning only. The final dimensions, shipping weight, cabinet arrangement, and installed options should be confirmed against the exact configured unit before procurement, transportation, lifting, foundation design, and installation.