Technical Specifications

FAQ

1. What is the rated output current of the Allen-Bradley 20BW098A0ANNANC0?
The Allen-Bradley 20BW098A0ANNANC0 has a continuous output current rating of 98 A at 932 V DC input. Its normal-duty rating is 90 kW / 90 HP, while the heavy-duty rating is 75 kW / 75 HP. For short-duration overload operation, the drive can provide approximately 123 A for up to 1 minute and 140 A for up to 3 seconds. When selecting a motor, the actual motor full-load current should be compared with the drive’s duty rating rather than selecting the drive based only on motor horsepower.

2. What type of motor control does the 20BW098A0ANNANC0 support?
This PowerFlex 700 drive supports vector-based motor control with 24 V DC I/O. Sensorless vector control can provide improved torque and speed regulation compared with basic V/Hz operation, particularly at lower speeds and during load changes. The drive also supports V/Hz control for applications where a simpler control strategy is sufficient. Proper motor data entry and autotuning are important during commissioning because the control algorithm relies on accurate motor electrical characteristics for stable operation.

3. Does the 20BW098A0ANNANC0 have an internal braking resistor or brake IGBT?
No. The 20BW098A0ANNANC0 is supplied without an internal brake IGBT and without an internal drive-mounted braking resistor. Therefore, applications involving rapid deceleration or high-inertia loads must be evaluated carefully for DC-bus voltage rise. If regenerative energy exceeds what the drive can absorb internally, an appropriate external braking solution or an alternative regenerative system may be required. Deceleration time, load inertia, stopping frequency and operating cycle should all be considered when determining the braking method.

4. Can the 20BW098A0ANNANC0 be integrated with a PLC or DCS system?
Yes. The drive provides six digital inputs, three digital outputs, two analog inputs and two analog outputs for control and status signals. It does not include an internal communication module in this configuration, so network-based PLC or DCS integration requires an appropriate external communication option or interface architecture. Depending on the installed communication hardware, PowerFlex 700 systems can be integrated into industrial networks such as EtherNet/IP, DeviceNet, Modbus or PROFIBUS. For reliable control, the PLC/DCS should monitor drive status, fault information, speed reference and motor operating feedback rather than relying only on a run command.

5. What should be checked if the 20BW098A0ANNANC0 trips on overcurrent?
First check the motor and mechanical load for locked-rotor conditions, excessive friction, damaged bearings or sudden load increases. The motor cable should also be inspected for phase-to-phase faults, insulation problems and incorrect connections. Excessively short acceleration times can produce high current demand, so increasing the acceleration time may help determine whether the trip is caused by acceleration dynamics. Motor nameplate data and vector-control tuning should also be verified. The drive provides programmable current limiting, but current limiting should not be used as a substitute for correcting an improperly sized motor, overloaded machine or mechanical fault.

6. How should DC-bus overvoltage be diagnosed on this PowerFlex 700 drive?
DC-bus overvoltage commonly occurs when a motor regenerates energy during rapid deceleration or when the driven load forces the motor above its commanded speed. Because this model does not contain an internal brake IGBT or braking resistor, the first checks should include deceleration time, load inertia and the operating cycle. Increasing the deceleration time can reduce regenerative energy returned to the DC bus. If the application requires frequent rapid stopping, an external braking solution may be necessary. Incoming DC voltage should also be checked because excessive supply voltage can reduce the available voltage margin for normal operation.

7. What is the maximum output frequency of the 20BW098A0ANNANC0?
The maximum programmable output frequency is 420 Hz. However, operating a motor at frequencies significantly above its base frequency requires verification of motor mechanical limits, insulation capability, cooling characteristics and allowable overspeed. The drive’s maximum frequency should therefore not automatically be interpreted as the recommended operating frequency of the connected motor. For industrial commissioning, the maximum frequency should be established according to the motor manufacturer’s specifications and the mechanical characteristics of the driven equipment.

8. What installation and commissioning checks are important for the 20BW098A0ANNANC0?
Before energizing the drive, verify the DC input voltage, grounding arrangement, protective devices, power-terminal connections and motor cable insulation. Confirm that the motor rating and current are compatible with the 98 A drive rating and that the motor parameters entered into the PowerFlex 700 are correct. Check the control wiring for correct polarity and signal reference, particularly when using analog speed references or digital start/stop commands. During initial commissioning, perform a controlled low-speed test, observe output current and motor direction, and verify acceleration and deceleration behavior before applying the full mechanical load. Because the unit uses vector control without feedback, correct motor data and tuning are especially important for achieving stable speed and torque performance.