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Huawei H20-681-ENU Exam Syllabus Topics:

Huawei Certified Field Specialist -Smart PV Controller Sample Questions:

1. When the Huawei SUN2000 inverter is alarmed and cannot be connected to the network, the alarm ID is 313-1 (low insulation resistance). Which of the following measures can be taken to troubleshoot or try to solve? (Multiple Choice)

A) Check the AC insulation resistance value
B) Reduce the insulation resistance protection threshold in the setting
C) Connect to the DC string one by one and try to start troubleshooting the fault string.
D) Use one test tool such as a shaker to detect the insulation resistance of each string one by one.

2. When the equipment in the common photovoltaic power station communicates via RS485, the communication distance cannot exceed 1000 meters.

A) False
B) True

3. Huawei SmartLogger cannot find Huawei PID module when debugging, what is the possible reason? (Multiple choice)

A) The 85485 address of the PID module conflicts with the address of other devices connected to the SmartLogger
B) SmartLogger with PID version of the module does not match
C) The PID module communication parameter setting in SmartLogger is incorrect.
D) The communication line between PID module and SmartLogger is not connected.

4. The Huawei PID module is only used in the isolated grid-connected system, and there is no electrical connection between the AC side and the DC side of the inverter.

A) False
B) True

5. 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) False
B) True

Solutions: