Company Information
E-mail		[email protected]
Mobile		+8615980777398
Whatsapp		+8615980777398
WeChat		15980777398

1. Product Overview

The 20G11LD1K2AN2NNNNN is a high-power AC variable frequency drive designed for large industrial motor-control applications.

It belongs to the PowerFlex 755 series and is intended for demanding applications where a conventional compact variable frequency drive is not sufficient in terms of output current, motor horsepower, overload capability or system integration.

The drive is configured for a 480 VAC three-phase power system and has an output current rating of approximately 1135 A.

This places the unit firmly in the large industrial drive category. It is suitable for high-power motors used in heavy material handling, mining, conveyors, pumps, fans, blowers, process machinery and other large rotating equipment.

The catalog configuration also identifies an air-cooled Frame 9 construction with an 800 mm deep MCC-style enclosure and IP20 / NEMA Type 1 protection characteristics.

The model includes an enhanced LCD HIM configuration, providing a local operator interface for setup, monitoring and troubleshooting.

---

2. Brand and Product Series

---

3. Complete Model Identification

The catalog number 20G11LD1K2AN2NNNNN contains a number of configuration characters.

The important practical information can be summarized as follows:

The exact interpretation of every individual catalog character should always be considered together with the complete catalog-number structure, because some positions define options rather than basic electrical ratings.

---

4. Main Technical Parameters

---

5. Electrical Capacity

The most important specification of the 20G11LD1K2AN2NNNNN is its 1135 A output-current capability.

This is a very high current rating and indicates that the drive is intended for large motors.

For comparison, a small industrial VFD may have an output current of only a few amperes, while medium industrial drives may be rated at several tens or hundreds of amperes.

A 1135 A drive belongs to an entirely different application category.

It is designed for machinery where the motor itself can consume hundreds of kilowatts of mechanical power.

---

6. Horsepower and Power Range

The model is generally associated with approximately the following power levels:

For practical motor selection, however, the motor’s actual full-load current should receive greater attention than horsepower alone.

Two motors with the same horsepower can have different current requirements depending on motor efficiency, power factor, voltage and design.

---

7. Product Dimensions

The 20G11LD1K2AN2NNNNN is a large floor-standing drive.

It is not comparable in physical size to compact DIN-rail or small panel-mounted VFDs.

A practical preliminary dimensional estimate is shown below.

The 800 mm depth is particularly important when planning the electrical room or motor-control area.

Because the final enclosure arrangement can vary according to the selected configuration and accessories, the exact mechanical drawing should be used for final cabinet spacing, cable-entry planning and installation.

---

8. Weight

The unit is a very large electrical assembly.

For preliminary logistics and installation planning, a reasonable engineering reference is approximately:

Weight: 1200–1400 kg

A planning value of approximately 1300 kg can be used when estimating floor loading and handling requirements.

However, the exact shipping weight may change according to cabinet configuration, accessories, packaging and installation arrangement.

For a real project, the final mechanical drawing and shipping documentation should be treated as the controlling information.

---

9. Product Introduction

The 20G11LD1K2AN2NNNNN is designed to regulate the speed and torque of large AC motors.

A variable frequency drive changes the electrical conditions supplied to the motor so that motor speed can be adjusted according to the requirements of the machine.

This provides much greater control than simply switching a motor directly across the incoming power supply.

For a large motor, this difference is significant.

A direct-on-line start can create a substantial starting current and can place considerable mechanical stress on connected equipment.

With a properly configured VFD, the motor can be accelerated progressively.

This is particularly useful for large conveyors, pumps, fans, blowers and process machinery.

---

10. PowerFlex 755 Series

The PowerFlex 755 series is designed for advanced industrial motor-control applications.

The series covers applications ranging from large industrial machines to very high-power process equipment.

The 20G11LD1K2AN2NNNNN represents the high-power end of this family.

Its design is aimed at applications where the drive is part of a larger automation system.

The drive can exchange operating information with supervisory control equipment, allowing operators and engineers to monitor motor speed, current, status, alarms and faults.

---

11. Local LCD Operator Interface

One important distinction of this model is the enhanced LCD HIM configuration.

The local operator interface can be useful during:

• Initial commissioning
• Parameter configuration
• Motor setup
• Troubleshooting
• Fault diagnosis
• Local monitoring
• Maintenance
• Service work

An engineer working at the cabinet can obtain operating information without necessarily relying entirely on a remote HMI.

For large industrial equipment, this can significantly simplify commissioning and maintenance.

---

12. Main Applications

12.1 Large Conveyor Systems

Large conveyors are one of the most suitable applications for this type of drive.

A conveyor may have a very high mechanical inertia, particularly when it is carrying large quantities of bulk material.

Typical applications include:

• Mining conveyors
• Aggregate conveyors
• Bulk-material conveyors
• Port conveyors
• Coal handling
• Ore handling
• Cement conveyors
• Long-distance belt conveyors

The drive can provide controlled acceleration and deceleration, helping reduce mechanical shock.

---

12.2 Mining Machinery

Mining environments often contain very large motors.

The drive can be considered for:

• Ore conveyors
• Crushing-related equipment
• Material transfer systems
• Mine dewatering pumps
• Ventilation equipment
• Bulk-material handling

The high output-current capacity makes the drive suitable for large motor installations.

---

12.3 Large Pumps

Large industrial pumps may require hundreds of kilowatts of motor power.

Applications include:

• Water transfer
• Industrial water circulation
• Mine dewatering
• Cooling-water systems
• Process-water systems
• Wastewater systems
• Large-scale pumping stations

Variable-speed operation can allow the pump output to follow process requirements more closely.

---

12.4 Large Fans

Large fans are common in heavy industry.

Potential applications include:

• Industrial ventilation
• Furnace ventilation
• Process exhaust
• Cooling systems
• Dust extraction
• Air-handling equipment

For suitable fan loads, adjusting motor speed can provide a more flexible method of controlling airflow.

---

12.5 Large Blowers

Large blowers can require very substantial motor power.

Typical applications include:

• Process air
• Industrial air supply
• Furnace systems
• Combustion air
• Dust collection
• Manufacturing processes

The drive allows the motor speed to be adjusted according to the process demand.

---

13. Industrial Process Applications

The model can also be considered for:

• Cement plants
• Steel processing
• Metal processing
• Chemical processing
• Water treatment
• Mining
• Material handling
• Manufacturing
• Large HVAC systems
• Industrial ventilation
• Bulk solids processing

The common characteristic is the requirement for a large AC motor with controlled speed or torque.

---

14. Main Product Advantages

14.1 High Current Capacity

The 1135 A output rating is the major advantage.

It provides sufficient capacity for large industrial motors that cannot be handled by compact or medium-size VFDs.

---

14.2 Large Motor Capability

The approximate 1000 HP class capability makes this drive suitable for very large machines.

This is particularly useful when a plant needs centralized variable-speed control for high-power equipment.

---

14.3 Controlled Acceleration

Large mechanical systems can have considerable inertia.

Controlled acceleration helps avoid an abrupt application of torque.

This can reduce stress on:

• Couplings
• Shafts
• Gearboxes
• Conveyor belts
• Bearings
• Drive pulleys
• Mechanical transmission components

---

14.4 Controlled Deceleration

The same principle applies when stopping the machine.

Instead of stopping the motor abruptly, the drive can provide a controlled deceleration profile according to the application.

---

14.5 Local Operator Interface

The enhanced LCD HIM provides a convenient local interface.

This is particularly useful during commissioning and maintenance.

---

14.6 Industrial Communication

The drive can be incorporated into a plant-wide control architecture.

This allows the drive to become part of an integrated automation system rather than functioning as an independent motor controller.

---

14.7 High-Power Air-Cooled Construction

The air-cooled design is suitable for large industrial installations where forced-air cooling can be provided reliably.

It avoids the complexity of a liquid-cooled system.

---

15. Why the Frame 9 Design Matters

Frame 9 is intended for high-power equipment.

The physical structure provides the space needed for large power components and cooling arrangements.

This is why the unit has a substantially larger footprint than smaller VFDs.

The large enclosure also provides room for power connections and maintenance access.

For an engineering project, the Frame 9 designation should therefore be considered both an electrical and mechanical selection factor.

---

16. Installation Considerations

Because the drive is approximately 1300 kg class, installation planning is important.

The installation site should provide:

• Adequate floor strength
• Sufficient ventilation
• Appropriate cable access
• Maintenance clearance
• Safe operator access
• Suitable grounding
• Appropriate electrical protection
• Adequate cooling airflow

The lifting method should also be planned before the equipment arrives.

---

17. Cooling and Environmental Considerations

Large air-cooled drives generate substantial heat during operation.

The installation environment should therefore be assessed carefully.

Industrial environments containing dust, oil mist or corrosive contaminants require particular attention.

---

18. Maintenance Advantages

The local interface can simplify maintenance work.

An engineer can inspect operating parameters and fault information directly at the drive.

Typical maintenance activities include:

---

19. Five Same-Series or Closely Related Models

The following models are useful comparison choices within the same high-power product family.

The closest alternative is the 20G11LD1K2JN2NNNNN, particularly where the same basic electrical capacity is required with a different configuration.

---

20. Comparison of Closely Related 20G Models

---

21. Five Recommended Models from the Same Product Family

1. 20G11LD1K0AN0NNNNN

This is a lower-current alternative in the same high-power family.

It is appropriate when the motor current does not require the full 1135 A capability.

---

2. 20G11LD1K2JN2NNNNN

This is one of the closest alternatives to the subject model.

It maintains the same general high-power class and 1135 A capacity while using a different configuration.

---

3. 20G11LD1K3AN0NNNNN

This model provides a higher current capacity.

It is a useful option when the motor is larger than the practical range of the 1135 A model.

---

4. 20G11LD1K4AN0NNNNN

This is another high-power configuration for applications requiring additional current capacity.

---

5. 20G11LD1K5AN0NNNNN

This configuration is suitable as a further high-power comparison model.

---

22. Five Popular Models from the Same Brand

For a wider comparison, the following models cover different power ranges and application sizes.

---

23. Small-Motor Alternative

25B-D2P3N114

This is a compact drive intended for much smaller motors.

It is not an electrical replacement for the 20G11LD1K2AN2NNNNN, but it is useful when comparing the product range.

---

24. Compact Industrial Alternative

25B-D6P0N114

This is another compact industrial drive.

---

25. Medium-Power Alternative

20F11ND077JA0NNNNN

This model belongs to the PowerFlex 753 family and is intended for substantially smaller industrial motors than the 1135 A Frame 9 drive.

---

26. Application Selection Table

---

27. Advantages Compared with Direct Motor Starting

---

28. Advantages in Conveyor Applications

For large conveyors, the main benefit is controlled motor behavior.

A conveyor does not necessarily need to reach full operating speed immediately.

The drive can provide a controlled acceleration profile, allowing the mechanical system to reach operating speed progressively.

This can help reduce stress on the transmission system.

For long conveyors, coordinated speed control can also be useful when several drive systems operate together.

---

29. Advantages in Pump Applications

For pump systems, variable-speed operation can provide a more flexible method of matching pump output to process demand.

Instead of operating the motor continuously at maximum speed, the drive can adjust speed according to the process requirement.

This is particularly valuable in systems where demand changes throughout the day.

The actual energy benefit depends on the pump type, piping system, process conditions and operating schedule.

---

30. Advantages in Fan Applications

Fans and blowers often operate for long periods.

Where the process does not require maximum airflow continuously, speed control can provide a practical way of adjusting output.

The drive can therefore be integrated into a control strategy based on:

• Pressure
• Airflow
• Temperature
• Process demand
• Production rate

---

31. Communication and Automation

The 20G11LD1K2AN2NNNNN is intended to operate as part of an industrial automation system.

A typical architecture can be represented as:

PLC → Industrial Network → Drive → Motor → Machine

The control system can provide:

• Start command
• Stop command
• Speed reference
• Direction
• Process setpoint

The drive can return:

• Motor speed
• Output current
• Drive status
• Warning information
• Fault information
• Operating condition

This type of integration is useful in centralized production environments.

---

32. Local Operation and Troubleshooting

The enhanced LCD interface makes local commissioning easier.

An engineer can use the interface to inspect drive parameters and operating conditions.

This is particularly useful when:

• Commissioning a new machine
• Checking motor parameters
• Troubleshooting a fault
• Checking operating current
• Reviewing drive status
• Adjusting operating parameters
• Performing maintenance

For a large drive installed in a remote plant area, local diagnostic access can save considerable maintenance time.

---

33. Practical Installation Checklist

---

34. Overall Technical Summary

---

35. Final Product Assessment

The 20G11LD1K2AN2NNNNN is a high-power industrial drive intended for applications where motor power, current capacity and control requirements are significantly above the level of ordinary industrial VFDs.

Its 1135 A output rating is the key specification.

The drive is particularly well suited to large motors in the approximate 800–1100 HP duty range, depending on the actual load characteristics and duty classification.

The 480 VAC three-phase input, Frame 9 construction, air-cooled architecture, 800 mm deep MCC-style cabinet, IP20 / NEMA Type 1 enclosure, and enhanced LCD HIM make it suitable for large floor-standing industrial installations.

The product is a particularly logical choice for large conveyors, mining equipment, large pumps, industrial fans, blowers and other high-power rotating machinery.

The strongest practical advantages are its high current capability, large-motor capacity, controlled acceleration and deceleration, local operator interface, industrial automation integration and suitability for centralized plant control.

For a replacement or new installation, the most important point is not simply matching horsepower.

The final selection should be based on the motor nameplate current, motor voltage, load characteristics, overload requirement, acceleration/deceleration requirements, ambient conditions, altitude, cooling conditions, braking requirements, cable arrangement and control architecture.

For an application requiring approximately 1135 A at 480 VAC, the 20G11LD1K2AN2NNNNN represents a substantial high-power drive configuration within the PowerFlex 755 family.

For a lower-current application, the 20G11LD1K0AN0NNNNN can be considered.

For a higher-current application, the 20G11LD1K3AN0NNNNN provides a larger-capacity alternative.

For an application requiring essentially the same electrical capacity but a different configuration, the 20G11LD1K2JN2NNNNN is one of the closest models to compare.

In practical terms, the 20G11LD1K2AN2NNNNN is a large Frame 9, 480 VAC, 1135 A, air-cooled AC drive designed for high-power industrial motor control, with particular value in heavy-duty conveying, pumping, ventilation, mining and process applications.