Allen Bradley 20BD248A3ANNAND0 PowerFlex 700 AC Drive

Industrial Applications and Motor Control

The 20BD248A3ANNAND0 is designed for large motor-control systems where precise speed management, programmable operating characteristics, and reliable variable-frequency operation are required.

Typical applications include:

• Large conveyor and material-handling systems
• Industrial pumping equipment
• Cooling tower and ventilation fans
• Compressors and process machinery
• Extrusion and production lines
• Mining and bulk-material handling
• Steel and metal-processing equipment
• Paper and converting machinery
• Large machine tools
• Industrial HVAC systems
• Automated production equipment
• Heavy industrial process systems

The 248 A continuous output rating provides substantial motor-control capacity for large industrial loads. The drive can also accommodate temporary higher current demands, with specified output capability of 273 A for one minute and 372 A for three seconds.

For machines with different load characteristics, programmable acceleration and deceleration parameters allow commissioning engineers to control how quickly the motor reaches operating speed or stops. This is particularly useful for high-inertia mechanical systems where abrupt speed changes could create excessive mechanical stress.

Key Features for High-Power Automation

480 VAC three-phase operation
The 20BD248A3ANNAND0 is designed for 480 VAC three-phase industrial power and is rated for 248 A continuous output. Its normal-duty rating is 200 HP, while the heavy-duty rating is 150 HP.

Vector control with 120V I/O
This specific catalog configuration uses vector control with 120V I/O. The control arrangement should be considered carefully when replacing an existing PowerFlex 700 because different catalog configurations can use different I/O voltages.

High-current Frame 6 design
The Frame 6 architecture provides the physical and electrical capacity required for large motor applications. Its large-frame construction is appropriate for industrial control cabinets designed around high-power drives.

LCD full numeric keypad
The local interface provides an LCD display and full numeric keypad for parameter configuration, operational monitoring, and drive diagnostics.

Integrated EMC filtering
An EMC filter and common-mode choke are included in the configuration, helping control conducted electrical noise and supporting integration into industrial electrical systems.

No internal brake resistor
The 20BD248A3ANNAND0 does not include a drive-mounted brake resistor or brake IGBT. Applications involving substantial regenerative energy should therefore be evaluated separately for an appropriate braking solution.

Flexible stopping functions
The PowerFlex 700 platform provides several programmable stopping methods, including coast, DC braking, fast braking, and other configurable stopping functions.

Programmable acceleration and deceleration
Acceleration and deceleration times can be configured independently, allowing the drive to be adapted to different motor inertia and mechanical load requirements.

Multiple control and reference options
The drive supports different speed-reference and control arrangements, allowing it to work within standalone motor-control applications as well as larger automated systems.

10 Technical FAQs

1. What is the input voltage for the 20BD248A3ANNAND0?
The drive is designed for a 480 VAC, three-phase supply at 60 Hz. It belongs to the 380–480 VAC PowerFlex 700 voltage class.

2. What is the continuous output current?
The continuous output current is 248 A. The specified short-duration output capability is 273 A for one minute and 372 A for three seconds under the applicable operating conditions.

3. What is the horsepower rating?
The 20BD248A3ANNAND0 is rated for 200 HP in normal-duty applications and 150 HP in heavy-duty applications.

4. Does this model use vector control?
Yes. The A3 configuration is associated with vector-control operation. This model uses vector control with 120V I/O.

5. Does the drive have encoder feedback?
The 20BD248A3ANNAND0 is configured without a feedback option. Applications requiring encoder-based closed-loop operation should use a PowerFlex configuration equipped with the appropriate feedback hardware.

6. Does the drive have an internal braking resistor?
No. This model does not include a brake IGBT or an internal drive-mounted brake resistor. External braking equipment may be required for applications with high regenerative energy or rapid stopping requirements.

7. Can the 20BD248A3ANNAND0 be connected to a PLC?
Yes. PowerFlex 700 drives can be integrated into PLC-based automation systems using suitable control wiring and communication options. The exact communication architecture must be matched to the installed drive configuration.

8. What should be checked before installing the drive?
Incoming voltage, motor nameplate current, horsepower, motor wiring, grounding, control-I/O voltage, braking requirements, environmental conditions, and parameter settings should all be verified before commissioning.

9. What can cause an overcurrent fault during startup?
Common causes include incorrect motor data, excessively short acceleration time, mechanical blockage, incorrect motor wiring, excessive load torque, or inappropriate drive tuning. Increasing acceleration time and verifying motor parameters are common initial diagnostic steps.

10. How should this model be selected as a replacement?
The complete catalog number should be matched whenever possible. In particular, engineers should compare voltage, output current, duty rating, control-I/O voltage, feedback configuration, communication options, braking functions, and enclosure requirements rather than selecting a replacement based only on horsepower.