In the operation of the PV system, due to the quality of the components, the external environment or improper installation and operation will cause damage to components, circuit failure and other issues. PV power station is generally installed in the wilderness, or the roof, the natural environment is bad, inevitably encounter natural disasters, such as typhoons, snowstorms, dust and other natural disasters; or encounter people cut the cable and other damage. Therefore, the safety of the power station is very important.
