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

20G11BF795AN0NNNNN — Detailed Product Information, Technical Parameters, Applications, Advantages and Related Models

The 20G11BF795AN0NNNNN is a high-power air-cooled AC drive belonging to the PowerFlex 755 series.

It is designed for large three-phase motor applications where high current capacity, variable-speed control, controlled acceleration and reliable industrial operation are required.

This model is in the 690 VAC / 795 A class and is intended for large industrial equipment such as conveyors, pumps, fans, blowers, compressors, mining machinery, cement equipment and other high-power process systems.

The model uses a large Frame 9 construction and is normally installed as a floor-standing industrial electrical cabinet rather than as a small wall-mounted drive.

---

1. Basic Product Information

The dimensional and weight values are intended as practical reference values for the large Frame 9 packaged arrangement. Exact mechanical dimensions can vary with the final equipment configuration, cabinet arrangement and installed options.

For actual installation, lifting, transportation or replacement work, the exact mechanical drawing and equipment nameplate should be treated as the final reference.

---

2. Product Series

The 20G11BF795AN0NNNNN belongs to the PowerFlex 755 series.

The PowerFlex 755 series is positioned toward demanding industrial motor-control applications. It is intended for equipment that requires considerably more capability than a small or medium-power variable-frequency drive.

The series is commonly associated with:

• Large conveyors.
• Pumps.
• Fans.
• Blowers.
• Compressors.
• Mining machinery.
• Cement machinery.
• Material-handling equipment.
• Process machinery.
• Large industrial production systems.

The 795 A configuration is one of the high-current versions of the 690 VAC PowerFlex 755 range.

---

3. Product Introduction

The main purpose of the 20G11BF795AN0NNNNN is to control the speed and operating condition of a large three-phase AC motor.

Instead of connecting the motor directly to a fixed-frequency power source, the drive converts incoming electrical power and produces a controlled output waveform.

A simplified operating sequence is:

690 VAC Three-Phase Power

↓

AC Input / Precharge

↓

DC Bus

↓

Power Switching Section

↓

Variable-Frequency AC Output

↓

Three-Phase Motor

↓

Industrial Machine

This arrangement allows the motor speed to be changed according to the process requirement.

For large machines, this can make a significant difference in starting behavior, process control and mechanical operation.

---

4. Main Technical Parameters

---

5. Electrical Capacity

The most important electrical characteristic of this model is its 795 A output-current rating.

This places the unit firmly in the high-power industrial category.

The approximate power ratings can be summarized as follows:

The duty classification is important.

A machine that operates with continuous heavy torque or substantial overload requirements should not be sized simply according to the motor’s nominal kW rating.

The motor’s full-load current, overload requirement, acceleration requirements and operating cycle should all be considered.

---

6. 690 VAC Voltage Class

The 690 VAC voltage class is intended for high-power industrial motor systems.

At high motor power, using a higher voltage allows the required electrical current to remain within a practical range.

The 690 VAC class is commonly associated with large industrial motors and equipment.

Typical applications include:

• Mining conveyors.
• Large pumps.
• Industrial fans.
• Large blowers.
• Cement processing equipment.
• Material-handling systems.
• Industrial compressors.
• Process machinery.

The drive and motor should be selected as a complete electrical system.

---

7. 795 A Current Rating

The 795 A rating provides a substantial amount of motor current capacity.

This is particularly useful when a motor’s operating current exceeds the practical range of lower-current configurations.

A simplified comparison is shown below.

The 795 A model is especially useful when an application is close to the upper range of the 765 A configuration.

---

8. Frame 9

The drive uses Frame 9 construction.

Frame 9 is a large industrial drive frame designed for high-power applications.

This has several practical consequences.

The installation needs sufficient space for:

• Cabinet access.
• Power cables.
• Control cables.
• Cooling airflow.
• Maintenance.
• Component replacement.
• Transportation.
• Lifting.

Because the equipment is approximately 1270 kg, installation should be treated as a major industrial equipment project.

---

9. Dimensions

The approximate physical envelope is:

2453 mm × 1200 mm × 800 mm

These dimensions are intended for preliminary planning.

The actual finished cabinet can vary depending on the precise configuration and factory-installed options.

For a replacement project, cabinet drawings should be checked before removing existing equipment.

---

10. Weight

The approximate weight is:

1270 kg

This is one of the most important mechanical considerations for the installation.

The floor structure, lifting points, transportation path and installation area should all be evaluated before delivery.

A unit of this size can also create significant logistical requirements if it must pass through narrow doors or be installed on an elevated floor.

---

11. Cooling System

The model uses air cooling.

At approximately 800 kW normal-duty power, thermal management becomes an important part of the overall system design.

The drive generates heat during operation.

The electrical room therefore needs suitable ventilation and heat removal.

Important considerations include:

• Air inlet clearance.
• Air outlet clearance.
• Cooling-fan operation.
• Electrical-room temperature.
• Dust accumulation.
• Airflow restrictions.
• Hot-air recirculation.

If hot exhaust air returns to the drive intake, the internal temperature can increase and the thermal operating margin can decrease.

---

12. EMC Filter Configuration

The model uses an EMC filter configuration.

The filter is intended to help control electrical interference associated with high-frequency power switching.

This can be important when the drive is installed near:

• PLC systems.
• Industrial networks.
• Sensors.
• Instrumentation.
• Communication systems.
• Other drives.
• Control cabinets.

The filter does not replace proper grounding, bonding and cable-routing practices.

The complete installation should be designed with electromagnetic compatibility in mind.

---

13. Common-Mode Capacitor Jumper

The AN0 configuration corresponds to the common-mode capacitor jumper being removed.

This is an important catalog configuration detail.

Common-mode behavior can be affected by:

• Motor cable length.
• Motor insulation.
• Grounding.
• Cable shielding.
• Motor construction.
• Drive configuration.

For this reason, the catalog suffix should not be ignored when replacing the drive.

Two drives may have the same voltage and current rating but still have different factory configurations.

---

14. Dynamic Braking

The model is specified with:

Dynamic Braking: None

This is important for machines that have substantial rotating inertia.

During deceleration, the motor can return energy to the drive’s DC bus.

Applications that require very rapid stopping should therefore be evaluated separately.

Examples include:

• Large conveyors.
• Large fans.
• High-inertia process machines.
• Material-handling equipment.
• Large rotating machinery.

If rapid braking is required, the braking method must be considered during drive selection.

---

15. Main Product Applications

The 20G11BF795AN0NNNNN is suited to many high-power industrial applications.

The most common application categories include:

---

16. Conveyor Applications

Large conveyor systems are an excellent example of where a 795 A drive can be useful.

A conveyor can have substantial inertia, particularly when it is long and heavily loaded.

A direct fixed-speed starting method can create considerable mechanical stress.

With a variable-frequency drive, the acceleration can be controlled.

Potential advantages include:

• Smoother starting.
• Reduced belt shock.
• Reduced gearbox stress.
• Reduced coupling stress.
• Better control of material flow.
• Adjustable conveyor speed.
• Improved coordination between conveyor sections.

For mining and aggregate systems, these characteristics can be particularly valuable.

---

17. Mining Applications

Mining operations frequently use very large electric motors.

Potential applications include:

• Long-distance conveyors.
• Ore conveyors.
• Transfer conveyors.
• Dewatering pumps.
• Large ventilation fans.
• Material-handling machinery.
• Process equipment.

A high-current drive allows the motor to be operated at variable speed while maintaining controlled acceleration.

Mining environments should receive special attention because dust, vibration and temperature can influence electrical equipment performance.

---

18. Cement Industry Applications

Cement plants contain numerous large motors.

The drive can be considered for:

• Process fans.
• Exhaust fans.
• Conveyors.
• Blowers.
• Pumps.
• Material-handling systems.
• Large rotating process machinery.

The ability to vary motor speed allows the equipment to respond to changes in production requirements.

---

19. Pump Applications

Large pumps can require substantial motor power.

The drive can be used in applications such as:

• Water transfer.
• Cooling-water circulation.
• Industrial process water.
• Raw-water pumping.
• Wastewater pumping.
• Large pumping stations.

A simplified control concept is:

Low Demand → Lower Motor Speed

Medium Demand → Medium Motor Speed

High Demand → Higher Motor Speed

This allows the pump to respond to the actual process requirement.

---

20. Fan Applications

Large industrial fans can also benefit from variable-speed control.

Potential applications include:

• Furnace fans.
• Exhaust fans.
• Combustion-air fans.
• Cooling fans.
• Dust-collection fans.
• Process ventilation.
• Industrial ventilation.

Instead of operating permanently at maximum speed, the fan can operate at the speed required by the process.

---

21. Blower Applications

Large blowers can be used in:

• Wastewater aeration.
• Process-air systems.
• Industrial ventilation.
• Combustion systems.
• Pneumatic processes.

Variable-speed operation can allow blower output to follow the process requirement.

---

22. Compressor Applications

Large compressors are another possible application.

Important selection factors include:

The motor and compressor should be evaluated together rather than selecting the drive only from the compressor’s nominal power.

---

23. Main Advantages

23.1 795 A High-Current Capacity

The biggest advantage of the model is its 795 A current rating.

This provides a high-capacity solution for very large motors.

---

23.2 690 VAC Operation

The 690 VAC class makes the drive appropriate for high-power industrial motor systems.

---

23.3 Approximately 800 kW Normal-Duty Rating

The approximately 800 kW normal-duty rating places the drive among the larger industrial AC drive configurations.

---

23.4 Approximately 710 kW Heavy-Duty Rating

The approximately 710 kW heavy-duty rating provides substantial capability for demanding applications.

---

23.5 Variable-Speed Control

The motor speed can be adjusted according to process requirements.

This is especially useful for pumps, fans, conveyors and other variable-load machinery.

---

23.6 Controlled Acceleration

The drive can provide controlled motor acceleration.

This can reduce the mechanical shock associated with starting large rotating equipment.

---

23.7 Air-Cooled Architecture

Air cooling is practical for many large industrial electrical rooms.

It avoids the need for a dedicated liquid-cooling circuit.

---

23.8 Filtered Configuration

The EMC-filtered arrangement can be useful in industrial electrical systems where control equipment and power electronics operate in close proximity.

---

23.9 Large Application Range

The drive can be considered for many different high-power industries.

---

24. Advantages in Conveyor Systems

A large conveyor often operates for long periods.

The drive can provide:

• Controlled starting.
• Adjustable speed.
• Smoother acceleration.
• Better material-flow control.
• Reduced mechanical shock.

For large conveyors, these characteristics can contribute to smoother operation and easier process management.

---

25. Advantages in Pump Systems

For pumps, the major advantage is the ability to control speed according to actual demand.

Potential benefits include:

• Flexible flow control.
• Pressure control.
• Reduced mechanical stress.
• Better process response.
• Potential energy savings.

The actual energy savings depend on the pump system and operating conditions.

---

26. Advantages in Fan Systems

For fans, variable speed can allow airflow to follow actual demand.

This can provide:

• Flexible airflow control.
• Better process control.
• Reduced operation at unnecessary full speed.
• Smoother operation.
• Potential energy savings.

---

27. Advantages in Heavy Industrial Machinery

The model is particularly attractive when the application combines:

• Very high motor power.
• High motor current.
• Long operating periods.
• Large mechanical inertia.
• Variable process demand.
• Industrial automation requirements.

This is where a large PowerFlex 755 configuration provides substantially more capability than a small general-purpose drive.

---

28. Five Related Models from the Same Series

The following models are useful comparison choices within the high-power PowerFlex 755 family.

The 795 A model is positioned above the 765 A version and below the 960 A class.

---

29. Five Closely Related 795 A Models

Different catalog configurations around the same current rating can also be useful when comparing options.

These models should not automatically be treated as interchangeable.

The differences in the catalog suffix can represent important electrical or installation characteristics.

For a replacement project, the complete catalog number should be checked.

---

30. Five Representative Same-Brand Models

For broader product selection, the following are useful representative models from the same brand.

The first three models are substantially smaller products and should not be considered direct replacements for the 795 A Frame 9 drive.

---

31. High-Power Model Comparison

The 795 A configuration provides a useful step above the 765 A version when additional current capacity is required.

---

32. Current Capacity Comparison

The 795 A model can be useful when the motor current is too high for a 765 A drive but still within the practical range of the 795 A configuration.

---

33. Motor Selection Considerations

The drive should not be selected from motor kW alone.

The following motor parameters should be checked.

For a 795 A drive, the motor’s actual nameplate current should be compared with the applicable drive current rating.

---

34. Installation Considerations

Because the equipment is approximately 1270 kg, installation planning should begin before the equipment arrives.

Important considerations include:

Floor Capacity

The supporting structure should be capable of handling the equipment weight.

Transportation

The transportation route should accommodate a cabinet approximately 2.45 m high and 1.2 m wide.

Lifting

Suitable industrial lifting equipment should be used.

Cabinet Clearance

Adequate space should be provided for doors, cables and maintenance.

Ventilation

The room should have sufficient heat-removal capacity.

Cable Routing

Large motor and input cables require appropriate routing and termination planning.

---

35. Preventive Maintenance

A high-power drive should receive regular inspection.

A large drive can be a critical part of the production system, so preventive maintenance is particularly important.

---

36. Application in Large Conveyors

For a large conveyor, the 795 A capacity provides a substantial current range.

A controlled acceleration profile can help reduce sudden mechanical loading.

Potential benefits include:

• Reduced starting shock.
• Smoother belt acceleration.
• Reduced gearbox stress.
• Reduced coupling stress.
• Improved material flow.
• Adjustable conveyor speed.

For long conveyors, the ability to control motor speed can also help coordinate multiple sections of the material-handling system.

---

37. Application in Large Pumps

For large pumps, the drive provides variable-speed operation.

The pump can be operated according to:

• Flow demand.
• Pressure demand.
• Tank level.
• Process conditions.

This can provide a more flexible operating method than simply switching a fixed-speed motor on and off.

---

38. Application in Large Fans

Large fans often operate for long periods.

Variable-speed operation can allow airflow to be adjusted according to the process.

Possible advantages include:

• Better airflow control.
• Reduced unnecessary full-speed operation.
• Better process response.
• Lower mechanical stress.
• Potential energy savings.

---

39. Application in Mining

Mining equipment often requires high-power motors.

The 795 A drive can be considered for:

• Long belt conveyors.
• Ore transport.
• Material handling.
• Dewatering.
• Ventilation.
• Process machinery.

The industrial environment should be carefully evaluated before installation.

---

40. Application in Cement Plants

Cement plants can contain numerous high-power machines.

Potential applications include:

• Process fans.
• Material conveyors.
• Blowers.
• Pumps.
• Ventilation systems.
• Material-handling machinery.

The ability to vary motor speed can make the equipment easier to coordinate with the production process.

---

41. Application in Water Treatment

Large water-treatment systems may require substantial pumping and blower capacity.

The drive can be considered for:

• Raw-water pumping.
• Process-water pumping.
• Wastewater pumping.
• Aeration blowers.
• Cooling-water systems.

The variable-speed function can help the equipment respond to changing demand.

---

42. Product Advantages at a Glance

---

43. Complete Product Parameter Table

---

44. Recommended Related Models Summary

---

45. Recommended Same-Brand Models Summary

---

46. Overall Evaluation

The 20G11BF795AN0NNNNN is a high-capacity industrial AC drive designed for large three-phase motors.

Its main electrical characteristics are:

690 VAC

795 A

Approximately 900 kW light duty

Approximately 800 kW normal duty

Approximately 710 kW heavy duty

Frame 9

Air cooled

AC input with precharge

EMC filter

Common-mode capacitor jumper removed

No dynamic braking

Type 1 enclosure

IP20 drive protection

600 mm deep MCC-style construction

Approximately 2453 × 1200 × 800 mm

Approximately 1270 kg

The strongest feature of this model is its combination of 795 A current capacity and approximately 800 kW normal-duty power capability.

That makes it appropriate for large industrial machinery where a smaller drive would not provide sufficient current capacity.

The model is particularly well suited to large conveyors, mining equipment, pumps, fans, blowers, compressors, cement machinery, water-treatment systems and heavy material-handling equipment.

For conveyor applications, the controlled acceleration capability can help reduce mechanical shock.

For pumps and fans, variable-speed operation allows equipment output to follow process requirements.

For mining and cement applications, the large current capacity provides the electrical capability required by high-power motors.

The Frame 9 construction also means that physical installation should be taken seriously. With an approximate weight of 1270 kg and an approximate cabinet envelope of 2453 × 1200 × 800 mm, the equipment requires appropriate transportation, lifting, floor-loading, ventilation and maintenance planning.

One important characteristic of the AN0 configuration is the removed common-mode capacitor jumper. This configuration detail should be considered when replacing an existing drive because it can affect how the drive interacts with the motor, motor cable and grounding system.

The model also has no dynamic braking. If the application involves rapid stopping or a large amount of regenerative energy, the braking requirement should be evaluated separately.

When choosing between the 650 A, 710 A, 765 A, 795 A and 960 A versions, the most important selection factor is not simply the motor’s nominal kW rating. The motor’s full-load current, duty cycle, overload requirement, starting torque, acceleration time, deceleration requirement and operating environment should all be considered.

For a high-power 690 VAC motor system requiring approximately 795 A, the 20G11BF795AN0NNNNN represents a very large industrial drive configuration with substantial capacity for demanding variable-speed applications.