Technical Specifications

FAQ

1. What are the main electrical specifications of the 20BC170A0ANNANA0?

The 20BC170A0ANNANA0 is a three-phase PowerFlex 700 AC drive designed for industrial variable-speed motor applications. It operates from a 380–480 V AC supply, with 400 V AC as the nominal input voltage, and provides a rated output current of 170 A. The drive is rated for approximately 90 kW under normal-duty operation and 75 kW under heavy-duty conditions. These ratings make it suitable for relatively high-power industrial motors where controlled acceleration, speed regulation, and reliable operation are required. When selecting the drive, the motor’s rated current should be compared with the drive output rating, while load inertia, starting torque, acceleration time, overload requirements, and operating duty should also be considered.

2. What type of motor control is provided by the 20BC170A0ANNANA0?

The 20BC170A0ANNANA0 is part of the PowerFlex 700 AC drive family and is designed for advanced control of three-phase AC motors. Its vector-control architecture provides improved speed and torque control compared with basic frequency-based control. This makes the drive suitable for applications where stable speed regulation and controlled acceleration are important. Before operation, the motor nameplate information should be entered accurately into the drive parameters. Rated voltage, rated current, rated frequency, and rated speed are particularly important for establishing suitable motor-control characteristics. Incorrect motor data can result in unstable operation, excessive current, poor speed regulation, or unnecessary drive faults.

3. Does the 20BC170A0ANNANA0 have an internal braking resistor or brake IGBT?

No. The 20BC170A0ANNANA0 does not include an internal braking resistor or brake IGBT. This should be taken into consideration when applying the drive to high-inertia machinery or equipment requiring rapid and repeated deceleration. During deceleration, the motor can return regenerative energy to the drive’s DC bus, causing the DC-bus voltage to increase. If the regenerated energy is not properly managed, an overvoltage condition may occur. For applications involving rapid stopping, large rotating masses, hoisting, winding, centrifuges, or frequent start-stop cycles, the braking requirements should be evaluated during system design. An external braking solution or another appropriate regenerative-energy management method may be required.

4. What I/O capabilities are available on the 20BC170A0ANNANA0?

The 20BC170A0ANNANA0 provides six digital inputs, three digital outputs, two analog inputs, and two analog outputs. These I/O points allow the drive to be integrated with PLCs, control panels, sensors, relays, and other industrial automation equipment. Digital inputs can be configured for functions such as start, stop, enable, direction control, fault reset, or preset-speed commands. Analog inputs can be used for speed references or process-control signals, while analog outputs can provide operating feedback and monitoring information. The drive uses 24 V AC/DC I/O, so the control voltage should be verified before connecting external devices. During commissioning, each I/O function should be tested to confirm correct wiring, parameter assignment, signal response, and PLC logic.

5. Which communication protocols can be used with the 20BC170A0ANNANA0?

The PowerFlex 700 platform supports several industrial communication technologies, including DeviceNet, EtherNet/IP, PROFIBUS, CAN, Modbus, TCP/IP, and LON, depending on the communication option installed. The 20BC170A0ANNANA0 configuration does not include an internal communication module. If network-based control is required, an appropriate communication adapter should therefore be selected according to the PLC or automation network architecture. During commissioning, the network address, communication parameters, command source, speed-reference source, and communication timeout behavior should be configured correctly. Communication testing should include start and stop commands, speed references, drive status, alarms, and fault information to confirm that the drive and control system exchange data correctly.

6. How should the 20BC170A0ANNANA0 be configured for normal-duty and heavy-duty applications?

The 20BC170A0ANNANA0 has different power capabilities depending on the application duty. Its normal-duty rating is approximately 90 kW at 170 A, while the heavy-duty rating is approximately 75 kW. Normal-duty applications are generally associated with loads that have moderate starting and overload requirements, while heavy-duty applications can involve higher starting torque, greater cyclic loading, or more demanding acceleration conditions. The appropriate rating should be determined from the actual motor current and load profile rather than simply selecting the drive based on nominal motor power. If the application requires frequent acceleration, high starting torque, or sustained overload operation, the heavy-duty rating should be considered when determining whether the drive provides sufficient capacity.

7. How should an overcurrent or overload fault on the 20BC170A0ANNANA0 be diagnosed?

Troubleshooting should begin by determining when the fault occurs. If the fault appears during startup or acceleration, inspect the driven machine for mechanical blockage, excessive friction, excessive inertia, or an acceleration time that is too short. If the fault occurs during normal operation, check whether the process load has increased unexpectedly and inspect the motor, cables, terminals, and mechanical transmission system. The motor parameters stored in the drive should also be compared with the motor nameplate to ensure that rated voltage, current, frequency, and speed are correct. Loose motor terminals, incorrect phase connections, insulation problems, or motor faults can also cause abnormal current. If an overvoltage fault occurs mainly during deceleration, regenerative energy and the deceleration setting should be investigated. Reviewing the fault history together with output current, output frequency, and actual machine conditions can help identify the root cause.

8. What environmental conditions should be considered when installing the 20BC170A0ANNANA0?

The 20BC170A0ANNANA0 is specified for operation at temperatures up to 50 °C under the stated 400 V AC conditions. The allowable relative humidity is 5–95% without condensation, and the standard maximum installation altitude is 1000 m without derating. The drive uses an IP20 / NEMA Type 1 enclosure with conformal coating, so the installation environment should still be protected from direct water exposure, excessive moisture, conductive contamination, and corrosive atmospheres. Adequate ventilation is essential because the drive generates heat during operation, particularly when operating near its rated current. The installation area should also provide sufficient clearance for maintenance and airflow. At higher altitudes or in unusually high ambient temperatures, thermal performance should be evaluated and appropriate derating may be necessary. Regular inspection of cooling paths, electrical terminals, and drive fault records can help maintain reliable long-term operation.