Surge protector, Surge protection module, Power surge protector

The lightning protection system is mainly composed of the following three parts:

One, surge protectorIncluding lightning rods, lightning wires, lightning grids, lightning strips, and lightning arresters, these are the metallic parts that directly receive the lightning strike.

• Lightning rodGenerally installed at the top of high-rise buildings and chimneys, it utilizes the principle of sharp discharge to avoid direct lightning strikes at the installation location. It is typically mounted on frameworks, pillars, or buildings, with its lower end welded to the grounding device via down conductors.

• Lightning RodCommonly used to be installed on high-voltage overhead transmission lines to protect the overhead lines from direct lightning strikes, and can also be used to protect longer single-story buildings. Since the lightning protection wire is both overhead and grounded, it is also known as an overhead ground wire.

• Lightning protection grid and lightning protection stripCommonly used to protect buildings from direct lightning strikes and induced lightning. The lightning rod is usually installed around the roof, 100mm above the roof surface.150mm, supports 1m card spacing1.5m. The lightning rod mesh, in addition to being installed around the roof perimeter, should also be connected into a mesh with round or flat steel bars across the roof surface when necessary.

• Surge protectorThe lightning arrester is a protective device against overvoltage caused by lightning strikes, installed at the input end of the protected equipment. Its upper end is connected to overhead transmission lines, and the lower end is grounded. The lightning arrester is primarily used to protect electrical equipment and is a specialized lightning protection device. Among them, the valve-type lightning arrester is a commonly used lightning protection device for transformers and distribution equipment; the tube-type lightning arrester is generally used on transmission lines; the protective air gap is a simple and cost-effective lightning protection device, also known as a simple lightning arrester, usually installed at the entry point of the circuit to protect meters and other equipment.

  Part Two: Downline RecruitmentThe middle section of the lightning protection device connects to the air terminal above and the grounding device below. Typically installed on the exterior wall of a building, it is grounded through a *short circuit. Each building usually has at least two down conductors. The down conductors are metallic conductors connecting the air terminal to the grounding device, generally using round steel or flat steel, with round steel being preferred. The diameter of the round steel should not be less than 8mm, and the cross-sectional area of the flat steel should not be less than 12mm x 4mm. The down conductors should be laid along the exterior walls of buildings or structures and grounded through the *shortest path. When buried underground, the cross-sectional area should be increased by one grade, meaning the round steel diameter should not be less than 10mm, and the flat steel cross-sectional area should not be less than 20mm x 4mm. Metal components of buildings or structures, such as fire ladders and steel columns, can also serve as down conductors, but electrical paths should be formed between all parts. The down conductors must meet the requirements for mechanical strength, corrosion resistance, and thermal stability.

  Grounding DeviceIncluding the grounding wires and grounding bodies buried underground, in soils with strong corrosiveness, galvanizing or increasing the cross-sectional area should be adopted for anti-corrosion measures. The grounding system is an important part of the lightning protection system, discharging lightning currents into the ground, and limiting the ground voltage of the lightning protection system to prevent it from being too high. In addition to independent lightning rods, as long as the grounding resistance meets the requirements, the lightning protection grounding system can be shared with other grounding systems. Generally, galvanized round steel, angle steel, flat steel, etc., are used to connect into horizontal grounding loops, grounding strips, or vertical grounding bodies, which are buried at a certain depth in moist soil. The reinforced concrete foundation of modern buildings can also serve as a grounding system.