Free Huawei H20-681-ENU Exam Dumps Questions & Answers

Islanding Effect refers to the effect that the grid-connected photovoltaic power generation system still maintains the power supply status to the adjacent part of the grid when the power grid suddenly loses pressure.

• A.  True
• B.  False

Using the USB flash drive, you can perform ( ) to SmartLogger2000. (Multiple Choice)

• A.  Upgrade the application
• B.  Full file export
• C.  Data export
• D.  Full file import

Which of the following description about the operation of the software are correct? (Multiple choice)

• A.  Whenever the equipment/system is found to be operating abnormally, it is necessary to communicate with the equipment supplier or relevant responsible person in time to detect or prevent the failure as soon as possible.
• B.  After the on-site operation is completed, the customer site logbook must be updated in a timely manner.
• C.  Before performing important software operation tasks, you need to submit a software operation application and get approval of the customer and Huawei service manager.
• D.  Develop a system fallback mechanism. If unexpected results are produced, start the system fallback mechanism as soon as possible, end the work, and re-enact the implementation plan.

When installing the AC line of the Huawei SUN2000 inverter, it is recommended that the stripping length of the insulation layer be 2mm~3mm longer than the crimping area of the OT terminal sub cable for convenient wiring. After pressing the terminal, the place of line needs to be covered with a heat shrinkable T bush or insulating rubber tape.

• A.  True
• B.  False

When the PV sub-array adopts Huawei PLC communication networking, the knife-melting switch needs to be added between the box-changing busbar and the Huawei PL CCO module. The rated current of the fuse cannot be less than ____.

• A.  5
• B.  15
• C.  10
• D.  6