Technical Specifications

FAQ

1. What are the main electrical specifications of the 20BC170A0ANNANC0?

The 20BC170A0ANNANC0 is a three-phase PowerFlex 700 AC drive designed for industrial variable-speed motor control. It operates from a 380–480 V AC input supply, with a nominal input voltage of 400 V AC, and provides a rated output current of 170 A. The drive is rated at approximately 90 kW for normal-duty operation and 75 kW for heavy-duty applications. These ratings make it suitable for relatively high-power industrial motor applications requiring controlled starting, acceleration, speed regulation, and deceleration. When selecting the drive, the motor’s rated current should be compared carefully with the drive rating. Load inertia, starting torque, acceleration time, operating cycle, and overload requirements should also be evaluated to ensure that the selected rating matches the actual application.

2. What control method does the 20BC170A0ANNANC0 use?

The 20BC170A0ANNANC0 uses vector control technology for three-phase AC motor control. This provides improved control of motor speed and torque compared with basic frequency-based control. Vector control is useful in applications where stable speed regulation, controlled acceleration, and better dynamic response are required, including conveyors, pumps, fans, compressors, and industrial machinery. During commissioning, accurate motor nameplate information should be entered into the drive, including rated voltage, rated current, rated frequency, and rated speed. Correct motor data is important for establishing appropriate control characteristics. Incorrect parameter settings can lead to unstable operation, excessive motor current, reduced torque performance, speed fluctuations, or unnecessary protective trips.

3. Does the 20BC170A0ANNANC0 include an internal braking resistor or brake IGBT?

The 20BC170A0ANNANC0 does not include an internal braking resistor or brake IGBT. This is an important consideration for applications involving high-inertia loads, rapid deceleration, or frequent start-and-stop cycles. During deceleration, the rotating motor and mechanical load can return energy to the drive’s DC bus. This regenerative energy can increase the DC-bus voltage, and excessive regeneration may cause an overvoltage fault. Applications such as hoisting systems, winding machinery, centrifuges, and large conveyor systems should therefore be evaluated carefully. The required deceleration time, load inertia, operating speed, and stopping frequency should be considered when determining whether an external braking or regenerative-energy management solution is required.

4. What I/O configuration is provided by the 20BC170A0ANNANC0?

The 20BC170A0ANNANC0 provides six digital inputs, three digital outputs, two analog inputs, and two analog outputs. The I/O system can be used to connect PLCs, sensors, relays, push buttons, interlocks, and other industrial automation equipment. Digital inputs can be assigned to functions such as start, stop, enable, forward/reverse control, fault reset, and preset-speed commands. Analog inputs can be used for speed references or process-control signals, while analog outputs can provide operating feedback to a PLC or monitoring system. The drive uses 24 V AC/DC I/O, so the external control circuit should be checked carefully before wiring. Each I/O point should be tested during commissioning to verify wiring, parameter assignment, signal response, and PLC logic.

5. What communication protocols are supported by the 20BC170A0ANNANC0?

The PowerFlex 700 platform can support several industrial communication technologies, including DeviceNet, EtherNet/IP, PROFIBUS, CAN, Modbus, TCP/IP, and LON, depending on the communication option installed. The 20BC170A0ANNANC0 configuration does not include an internal communication module, so an appropriate communication adapter may be required for integration with a PLC, SCADA system, HMI, or industrial network. During commissioning, the network address, communication settings, command source, speed-reference source, and communication timeout behavior should be configured correctly. Communication should then be tested using start and stop commands, speed references, drive status, alarms, and fault information. Proper communication-failure handling should also be established so that a network interruption does not result in unexpected machine behavior.

6. What is the difference between the normal-duty and heavy-duty ratings of the 20BC170A0ANNANC0?

The 20BC170A0ANNANC0 has a normal-duty power rating of approximately 90 kW and a heavy-duty power rating of approximately 75 kW. Normal-duty applications generally involve relatively stable loads with moderate starting torque and limited continuous overload requirements. Heavy-duty applications typically involve higher starting torque, greater load inertia, frequent acceleration and deceleration, or more demanding cyclic loading. The appropriate rating should therefore be determined from the actual motor current and machine operating profile rather than from motor power alone. If the motor frequently starts under load, operates at high torque, or experiences repeated overload conditions, the heavy-duty rating should be evaluated carefully to ensure sufficient current and thermal capacity.

7. How should an overcurrent or overload fault on the 20BC170A0ANNANC0 be diagnosed?

The first step is to determine when the fault occurs: during starting, acceleration, constant-speed operation, or deceleration. If the fault occurs during starting or acceleration, inspect the machine for mechanical blockage, excessive friction, bearing problems, excessive inertia, or an unexpected increase in load. The acceleration time should also be checked to determine whether the motor is being accelerated too aggressively. Next, inspect the motor power cables and terminals for loose connections, incorrect wiring, insulation problems, or phase-to-phase faults. The motor parameters stored in the drive should also be compared with the actual motor nameplate. If the fault occurs primarily during deceleration, regenerative energy and the programmed deceleration time should be investigated. Reviewing the drive fault history together with output current, output frequency, and the actual machine load can help distinguish between electrical, mechanical, and parameter-related causes.

8. What environmental conditions should be considered when installing the 20BC170A0ANNANC0?

The 20BC170A0ANNANC0 uses an IP20 / NEMA Type 1 enclosure and includes conformal coating, making it suitable for controlled industrial installation environments. The specified operating temperature can reach up to 50 °C, while relative humidity should remain between 5% and 95% without condensation. Under standard conditions, the maximum installation altitude is 1000 m without derating. Adequate ventilation and heat dissipation must be provided around the drive, particularly when it operates close to its rated output current. The IP20 enclosure is not intended for direct exposure to water, severe moisture, or large quantities of conductive dust, so suitable cabinet or environmental protection should be provided. High-altitude installations, elevated ambient temperatures, and restricted airflow may require additional thermal evaluation and derating. Regular inspection of cooling paths, power terminals, control wiring, and fault history is recommended to maintain reliable long-term operation.