Lightning Arrester

Arrester is a special lightning arrester used to protect buildings and electrical equipment from the hazards of lightning.

Main function:
The main function of the arrester is to introduce lightning current into the earth under lightning strike, thereby protecting buildings and electrical equipment from direct lightning strikes or induced overvoltage damage.

Working principle:
Different types of arresters have different working principles. For example, zinc oxide arresters use the nonlinear resistance characteristics of zinc oxide materials to limit overvoltage. When lightning strikes, its resistance drops sharply, discharging the energy of overvoltage to achieve the effect of protection. Gap arresters use the air gap discharge between electrodes to limit overvoltage.

Common types:

Zinc oxide arresters: It has the advantages of fast response speed, low residual pressure, and strong pollution resistance. It is a widely used type of arrester.
Gap arresters: It has a simple structure, but the discharge voltage is unstable, and it is suitable for occasions where the discharge voltage is not required.
Tube type arrester: It has a discharge gap and an arc extinguishing device, which can quickly extinguish the arc after discharge and has a good voltage limiting effect.

Structural features: Arrester is usually made of conductive materials, such as copper, aluminum or galvanized steel, to ensure good conductivity. In addition, the structure of the arrester is strong and can withstand the mechanical stress under lightning strikes.

Application scenarios: Arrester is widely used in various buildings, power systems and electrical equipment, such as power stations, substations, power lines and motors, to protect these facilities from the harm of lightning.

A complete set of lightning protection devices: It usually includes lightning arresters (such as lightning rods), down conductors (lightning conductors) and grounding devices. As an important component, the arrester, together with the lightning arrester and down conductor, constitutes a complete lightning protection system.

In summary, the arrester plays a vital role in the lightning protection system and is an important device to protect buildings and electrical equipment from the harm of lightning.