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20G11LD960AN4NNNNN — Detailed Product Information, Technical Parameters, Applications, Advantages and Related Models

The 20G11LD960AN4NNNNN is a high-power, air-cooled variable-frequency AC drive in the PowerFlex 755 family. It is intended for large three-phase motor applications where high current capacity, adjustable speed, controlled acceleration and industrial automation integration are required.

This model is a 480 VAC, three-phase, 960 A, Frame 9 drive. Its configuration is based on an 800 mm deep MCC-style enclosure, with Type 1 / IP20 protection, an EMC filter, AC input with precharge/DC terminals and a door-mounted HIM arrangement. The model is designed for large industrial machinery rather than small or medium-sized motor applications.

The following information is presented as a practical technical description. For dimensions and weight, values that depend on the final cabinet configuration are identified as such rather than assigning an unsupported figure.

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1. Product Overview

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2. Product Introduction

The 20G11LD960AN4NNNNN is a large-capacity AC drive designed to regulate the speed and operating characteristics of high-power three-phase motors.

Unlike a conventional motor starter, which primarily connects a motor to the electrical supply, a variable-frequency drive can control the frequency and voltage supplied to the motor. This provides much greater control over motor acceleration, deceleration and operating speed.

The 960 A output rating places this unit in the high-capacity range of industrial drives.

It is therefore more appropriate for large equipment such as major conveyor systems, large pumps, industrial fans, blowers, material-handling equipment and other high-power machinery.

The drive is also designed to operate as part of an industrial automation system. Embedded EtherNet/IP communication makes it suitable for applications in which motor commands, status information, faults and operating data need to be exchanged with a higher-level control system.

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3. Product Series

The product belongs to the:

PowerFlex 755 Series

The PowerFlex 755 series is intended for demanding industrial motor-control applications.

Compared with smaller general-purpose drives, the 755 platform is aimed at installations where motor control, automation integration, diagnostics and application flexibility are important.

Typical functions associated with this type of drive include:

• Variable-speed motor control
• Controlled acceleration
• Controlled deceleration
• Speed reference control
• Motor monitoring
• Fault and alarm handling
• Network communication
• Process integration
• Local operator control
• Drive diagnostics
• High-power motor operation

The 20G11LD960AN4NNNNN represents a particularly large-capacity configuration within the series.

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4. Main Electrical Parameters

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5. 960 A Output Current

One of the most important characteristics of this drive is its 960 A output current rating.

This makes the unit suitable for high-power motors and large industrial machinery.

When selecting a drive for a motor, however, horsepower should not be the only consideration.

The following values should be checked:

• Motor rated voltage
• Motor full-load current
• Motor power
• Motor service factor
• Required overload
• Starting torque
• Acceleration time
• Deceleration time
• Load inertia
• Operating cycle
• Ambient temperature
• Installation altitude
• Braking requirements

The 960 A rating provides substantial capacity, but the correct final selection should always be based on the motor’s actual electrical requirements and the mechanical characteristics of the load.

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6. Duty Ratings

The drive has different application capacities depending on the duty classification.

This distinction is particularly important for industrial machinery.

A large centrifugal fan may have a relatively predictable torque requirement.

A conveyor carrying heavy material can have much higher starting requirements.

A machine with high inertia or frequent acceleration and deceleration can also impose additional demands on the drive.

For demanding applications, the heavy-duty rating should be considered rather than simply selecting the drive according to the motor nameplate horsepower.

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7. 480 VAC Three-Phase System

The 20G11LD960AN4NNNNN is designed for a 480 VAC three-phase industrial power system.

This makes it appropriate for large industrial electrical installations.

Because the unit operates at a high current level, the associated electrical infrastructure needs to be designed appropriately.

Important installation considerations include:

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8. Embedded EtherNet/IP

The drive includes embedded EtherNet/IP communication.

This is a useful feature for modern industrial automation systems.

A control system can use the network to exchange information with the drive rather than relying entirely on individual hardwired signals.

Depending on the control architecture, typical information can include:

• Start command
• Stop command
• Speed reference
• Direction
• Drive ready status
• Running status
• Fault status
• Warning status
• Actual speed
• Motor current
• Operating information
• Diagnostic information

For a large production line containing multiple drives, this type of communication can simplify system integration.

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9. Door-Mounted HIM

The AN4 configuration is associated with a door-mounted Human Interface Module arrangement.

This provides local access to the drive.

The local interface can be useful during:

• Initial commissioning
• Parameter configuration
• Troubleshooting
• Preventive maintenance
• Local testing
• Fault investigation
• Drive monitoring

A technician working at the electrical cabinet can access important drive information without having to operate the entire system from a remote control station.

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10. IP54 / NEMA 12 Class HIM Protection

The door-mounted operator interface is associated with an IP54 / NEMA 12 class arrangement.

This is useful where the operator interface needs additional protection from the surrounding industrial environment.

It is important to distinguish the HIM protection from the overall drive enclosure.

The drive itself is specified as Type 1 / IP20, while the door-mounted interface has its own environmental protection characteristics.

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11. Air-Cooled Construction

The drive uses a forced-air cooling arrangement.

At 960 A, heat management is a major part of the installation.

The cabinet should therefore have appropriate:

• Air circulation
• Ventilation
• Cooling capacity
• Ambient temperature control
• Service access
• Fan maintenance
• Air-path cleanliness

Dust accumulation around cooling components can negatively affect thermal performance.

For installations in dusty industrial environments, maintenance planning is particularly important.

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12. EMC Filter

The configuration includes an EMC filter.

Electromagnetic compatibility is an important consideration when installing a large variable-frequency drive.

A good installation should consider the complete electrical system, including:

• Grounding
• Motor cable routing
• Shielding
• Cable length
• Control wiring
• Network wiring
• Cabinet bonding
• Separation between power and signal cables

The EMC filter is one part of the overall EMC design.

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13. Dynamic Braking

The specified configuration does not include a dynamic-braking transistor.

This should be considered when the application has significant stopping requirements.

Applications that may require additional braking analysis include:

• High-inertia conveyors
• Large rollers
• Hoisting equipment
• Winders
• Unwinders
• Large fans
• High-speed rotating machinery
• Heavy rotating assemblies

The mechanical energy generated during deceleration needs to be considered when determining the appropriate braking strategy.

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14. Enclosure and Cabinet Construction

The drive is specified with a:

Type 1 / IP20 / 800 mm Deep MCC-Style enclosure.

This is a large floor-standing industrial arrangement.

It is intended for installation inside an appropriate electrical or industrial environment.

The equipment should be protected from unsuitable environmental conditions such as:

• Direct water exposure
• Rain
• Condensation
• Conductive contamination
• Excessive dust
• Corrosive substances
• Excessive ambient temperatures

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15. Dimensions

The catalog configuration identifies an 800 mm deep MCC-style cabinet.

Because this is a large packaged drive, the exact overall dimensions can depend on the final configuration and cabinet arrangement.

For actual mechanical installation, the dimensional drawing for the supplied unit should be used rather than estimating the cabinet width or height.

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16. Weight

The complete weight should be treated as configuration dependent.

This is especially important for a Frame 9 packaged drive because cabinet construction, options and associated equipment can affect the final shipping and installed weight.

For transportation and installation planning, the actual equipment documentation and nameplate information should be used to confirm the final weight in kg.

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17. Main Applications

17.1 Large Conveyor Systems

Large conveyors are an excellent application for a high-current variable-frequency drive.

Controlled acceleration can help reduce sudden mechanical loading.

Potential applications include:

• Mining conveyors
• Aggregate conveyors
• Cement conveyors
• Bulk-material conveyors
• Port material-handling systems
• Large production conveyors

The drive can provide controlled speed operation and allow the process system to adjust conveyor speed according to production requirements.

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17.2 Mining Machinery

Mining operations often require high-power electric motors.

Potential applications include:

• Ore conveyors
• Material transfer systems
• Mine ventilation
• Dewatering pumps
• Processing systems
• Bulk-material handling

The 960 A capacity makes this model appropriate for very large motor-driven systems.

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17.3 Cement Plants

Large cement facilities contain numerous high-power motors.

The drive can be considered for:

• Large fans
• Process blowers
• Conveyors
• Pumps
• Material handling
• Dust extraction
• Process equipment

Variable-speed control can help match motor operation to actual process requirements.

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17.4 Aggregate Processing

Aggregate processing plants frequently use large motors for:

• Conveyors
• Feeders
• Screens
• Pumps
• Fans
• Material transfer equipment

The drive’s high current capacity is particularly useful for large material-handling systems.

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17.5 Large Pumps

Large pumps are another important application.

Variable-speed control can regulate:

• Flow
• Pressure
• Process demand
• Starting conditions
• Operating speed

For suitable centrifugal-pump applications, reducing speed can provide considerable operating efficiency compared with continuously operating the motor at full speed.

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17.6 Large Fans and Blowers

Large fans and blowers are often operated according to process demand.

Potential applications include:

• Industrial ventilation
• Mine ventilation
• Furnace air systems
• Process exhaust
• Dust extraction
• Cooling systems
• Large industrial blowers

The ability to vary motor speed can provide better process control than simple full-speed operation.

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18. Product Advantages

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19. Energy Management Benefits

One of the main practical benefits of a variable-frequency drive is the ability to operate a motor at a speed appropriate to the actual process requirement.

This can be especially valuable with centrifugal pumps and fans.

For example, a pump that does not need full flow does not necessarily need to operate at full motor speed.

Similarly, a ventilation fan may not need maximum airflow continuously.

Reducing speed can help reduce unnecessary motor power consumption.

Potential benefits include:

• Reduced operating speed
• Better process matching
• Reduced mechanical losses
• Improved flow control
• Improved pressure control
• Lower unnecessary energy consumption
• Reduced mechanical stress

Actual energy savings depend on the machine and operating profile.

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20. Mechanical Advantages

Large motors can produce substantial mechanical forces during direct starting.

A variable-frequency drive can provide controlled acceleration.

This can reduce sudden torque transfer through:

• Shafts
• Couplings
• Gearboxes
• Bearings
• Conveyor belts
• Pump assemblies
• Fan assemblies

The result can be smoother machine operation.

It can also help reduce mechanical shock during normal starting and stopping.

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21. Automation Advantages

The embedded EtherNet/IP interface is particularly useful when the drive is part of a larger automated production system.

Possible control functions include:

• Remote start
• Remote stop
• Speed reference
• Direction control
• Status monitoring
• Fault monitoring
• Warning monitoring
• Process interlocking
• Drive diagnostics

This allows the drive to operate as part of a coordinated automation system rather than as an isolated motor controller.

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22. Maintenance Advantages

The local HIM can be useful for maintenance technicians.

Typical activities include:

• Checking drive status
• Reading fault information
• Monitoring operating values
• Adjusting parameters
• Performing local tests
• Investigating warnings
• Checking operating conditions

For a large industrial drive, local access can save time during commissioning and troubleshooting.

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23. Maintenance Considerations

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24. Five Same-Series or Closely Related Models

The following models are suitable for comparison within the high-power PowerFlex 755 range.

The AN0, AN2 and AN4 versions should not be treated as identical products. The suffix configuration affects the installed options and operator-interface arrangement.

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25. Five Additional Related Models

These models are related configurations rather than guaranteed direct replacements.

For replacement work, the entire catalog number should be compared carefully.

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26. Five Popular Models from the Same Brand

The following selection provides a broader comparison across smaller and larger drive capacities.

The first two models are considerably smaller than the subject product and are intended for different motor sizes.

The 753 and 755 platforms are more appropriate for larger industrial installations.

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27. Application Comparison

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28. Detailed Mechanical Parameters

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29. Detailed Electrical Parameters

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30. Product Advantages in Practical Use

High Current Capacity

The 960 A output rating allows this drive to control very large industrial motors.

Suitable for Large Machinery

The drive is particularly appropriate for equipment where motor power is too high for compact general-purpose drives.

Variable-Speed Operation

The motor does not have to operate continuously at full speed.

This allows the machine to be matched more closely to process requirements.

Controlled Acceleration

The drive can provide a smoother starting process than direct motor starting.

Industrial Network Integration

Embedded EtherNet/IP provides a convenient connection to an industrial automation network.

Local Operation

The door-mounted HIM gives maintenance and commissioning personnel local access to the drive.

Large Cabinet Construction

The MCC-style cabinet provides a practical arrangement for a large-capacity industrial drive.

Broad Application Range

The product can be applied to pumps, fans, conveyors, blowers and many other high-power motor systems.

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31. Important Points Before Purchasing or Replacing

The 20G11LD960AN4NNNNN is a highly specific catalog configuration.

The complete model number should therefore be retained when specifying a replacement.

Do not select a replacement solely because it has:

• The same voltage
• The same current
• The same horsepower
• The same PowerFlex series

The complete catalog number determines the configuration.

Particular attention should be paid to:

1. Input configuration.
2. Operator-interface configuration.
3. Enclosure arrangement.
4. EMC filtering.
5. Braking configuration.
6. Communication capability.
7. Duty rating.
8. Cabinet dimensions.
9. Cooling arrangement.
10. Actual product weight.

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32. Recommended Selection Checklist

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33. Overall Technical Summary

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34. Final Product Evaluation

The 20G11LD960AN4NNNNN is a high-capacity industrial variable-frequency drive designed for large three-phase motor applications.

Its 960 A output rating, 480 VAC three-phase input, Frame 9 construction and 900 HP / 800 HP / 700 HP LD-ND-HD rating structure place it firmly in the large industrial-drive category.

The PowerFlex 755 platform makes the unit suitable for applications where speed control needs to be combined with industrial automation, network communication, diagnostics and local operator access.

The embedded EtherNet/IP interface is useful for connecting the drive to a larger control system, while the door-mounted HIM provides convenient local access during commissioning and maintenance.

The 800 mm deep MCC-style cabinet is appropriate for a large electrical-room installation, but it also means that cabinet space and service clearance must be planned carefully.

The drive is especially suitable for:

• Large conveyors
• Mining equipment
• Cement machinery
• Aggregate handling systems
• Large pumps
• Large fans
• Large blowers
• Industrial ventilation
• Bulk-material handling
• High-power process machinery

The most important specifications to verify before final selection are the 960 A output current, motor full-load current, LD/ND/HD duty requirement, 480 VAC supply, braking requirements, cabinet dimensions, cooling conditions and actual product weight in kg.

For transportation, cabinet design and installation, the actual supplied unit’s dimensional and weight information should be used, because the complete packaged configuration can affect the final width, height and weight.