Lightning protection testing (including acceptance testing and annual testing) refers to the activity of testing the lightning protection devices of buildings. Its purpose is to determine whether the lightning protection devices meet the requirements of national standards, industry standards, and design documents, identify potential accidents, and prevent or reduce the occurrence of lightning disasters. It is also an important component of lightning protection engineering and a necessary measure to ensure the safe operation of buildings.

Implement the policy of "safety first, prevention oriented, and comprehensive management", identify potential lightning hazards and harmful factors in construction projects, point out hidden dangers, and propose supplementary and improved countermeasures and measures to meet the requirements of safety production. At the same time, provide guidance for the renovation of lightning protection projects.

In order to prevent accidents caused by lightning disasters, prevent and reduce personal injuries and fatalities caused by lightning strikes on buildings, reduce significant property losses, and ensure the safety of personnel, as well as equipment, electrical, and electronic systems damaged or operated incorrectly due to electromagnetic pulses from lightning strikes, in accordance with relevant national lightning protection laws, regulations, and technical specifications, safety rectification construction of existing lightning protection devices shall be carried out to meet national regulatory requirements.

SPD is an indispensable device for lightning protection in electronic equipment. Its function is to limit the instantaneous overvoltage that enters power lines or signal transmission lines within the voltage range that the equipment or system can withstand, or to discharge strong lightning currents into the ground, protecting the protected equipment or system from impact, minimizing equipment damage, and reducing property losses.