Allen Bradley 20BD248A3ANNANC0 PowerFlex 700 AC Drive

Industrial Applications and Motor Control

The 20BD248A3ANNANC0 is designed for applications where reliable speed regulation and controlled motor operation are required at relatively high power levels. Its 248 A output rating allows it to control large three-phase motors while providing configurable acceleration, deceleration, current limiting, and stopping functions.

Typical applications include:

• Large conveyor and material-handling systems
• Industrial pumps and pumping stations
• Cooling and ventilation fans
• Compressors and process equipment
• Extrusion and production machinery
• Mining and bulk-material handling equipment
• Paper, steel, and general manufacturing machinery
• Large machine tools and production lines
• Industrial HVAC motor systems
• Process lines requiring adjustable motor speed

The drive supports multiple programmable stop modes, including coast, DC braking, fast braking, and other configurable stopping strategies. Two independently programmable acceleration and deceleration times can be configured over a broad range, making the drive adaptable to different machine inertia and production requirements.

For motor-control systems where feedback is not required, the vector-control configuration provides a practical solution for maintaining speed and torque performance without adding a feedback device.

Key Features and Industrial Advantages

The 20BD248A3ANNANC0 combines the high-power architecture of the PowerFlex 700 family with a factory-defined control configuration intended for large 480 V AC motor applications.

High-power 480 VAC operation
The drive is designed for 480 VAC three-phase input and provides 248 A continuous output current. Its normal-duty rating is 200 HP, while the heavy-duty rating is 150 HP.

Vector control with 24V DC I/O
The catalog configuration uses vector control with 24V DC I/O, providing improved motor-control capability for applications requiring more precise speed and torque management.

Full numeric LCD interface
The LCD display and full numeric keypad provide a convenient local interface for parameter configuration, drive status monitoring, fault diagnosis, and operational adjustment.

EMC filtering and common-mode choke
The configuration includes an EMC filter with a common-mode choke, helping the drive integrate into industrial electrical systems where electromagnetic compatibility is an important consideration.

No internal brake resistor
The 20BD248A3ANNANC0 does not include a drive-mounted brake resistor or brake IGBT. Applications requiring regenerative braking or controlled braking energy dissipation should therefore be engineered with the appropriate external braking solution where applicable.

IP20 / NEMA Type 1 construction
The drive uses an IP20 / NEMA/UL Type 1 enclosure configuration and is intended for installation inside a suitable industrial control enclosure.

Flexible motor-control modes
The PowerFlex 700 platform supports sensorless vector and V/Hz motor-control methods, allowing the drive to be configured according to the requirements of the connected motor and machine.

High overload capability
The drive provides 110% overload capability for up to one minute and 150% overload capability for up to three seconds under the specified operating conditions.

Large-frame industrial architecture
With Frame Size 6 construction, the drive is intended for high-power applications where substantial motor current and robust industrial control functionality are required.

10 Technical FAQs

1. What is the rated input voltage of the 20BD248A3ANNANC0?
The drive is designed for 480 VAC, three-phase input at 60 Hz. Its specified drive voltage range is based around the 380–480 VAC class.

2. What motor power can the 20BD248A3ANNANC0 control?
The drive is rated for 200 HP under normal-duty operation and 150 HP under heavy-duty operation. Motor selection should always consider actual load current, duty cycle, acceleration requirements, and application conditions rather than horsepower alone.

3. What is the continuous output current?
The continuous output current rating is 248 A. The drive can provide 273 A for one minute and 372 A for three seconds under the specified normal-duty conditions.

4. Does this model have an internal brake resistor?
No. The 20BD248A3ANNANC0 is supplied without an internal brake resistor and without a brake IGBT. If the application requires dynamic braking, the braking system must be designed separately according to the required stopping energy.

5. Does the drive support vector control?
Yes. This specific catalog configuration uses vector control with 24V DC I/O. Sensorless vector and V/Hz control capabilities are available within the PowerFlex 700 architecture.

6. Does the 20BD248A3ANNANC0 include an encoder feedback interface?
This catalog configuration is specified without a feedback option. Applications requiring closed-loop feedback should use a properly configured PowerFlex solution with the necessary feedback hardware.

7. What type of local operator interface is provided?
The drive is configured with an LCD display and full numeric keypad. This interface can be used for parameter setup, monitoring operating values, viewing diagnostic information, and managing drive functions locally.

8. Can the drive be used with PLC-based control systems?
Yes. The PowerFlex 700 family is designed for integration into industrial control systems. The exact communication method must match the installed drive configuration and available control hardware. The 20BD248A3ANNANC0 itself does not include an internal communication module.

9. What should be checked before replacing an existing PowerFlex 700 drive with this model?
Engineers should verify input voltage, motor full-load current, horsepower, overload requirements, control mode, I/O voltage, feedback requirements, braking requirements, enclosure conditions, and communication architecture. The complete catalog number and installed options should be compared before replacement.

10. What are common causes of faults during commissioning?
Typical commissioning problems can result from incorrect motor data, unsuitable acceleration or deceleration settings, excessive mechanical load, incorrect control wiring, insufficient incoming power, motor insulation problems, or improperly configured protection parameters. Checking the motor nameplate data and drive parameter settings before applying full load is an important commissioning step.