The difference between lightning arrester and lightning rod

1. Concept difference: A lightning arrester is an electrical appliance used to protect electrical equipment from high transient overvoltage and limits the freewheeling time and often limits the freewheeling value; the lightning rod, also known as a lightning protection rod, is used to protect buildings , tall trees and other devices to avoid lightning strikes.

2. Differences in types: Lightning rods mainly include direct lightning rods, special lightning rods, advance pre-discharge lightning rods, etc.; lightning arresters are divided into metal oxide arresters, line-type metal oxide arresters, gapless line-type metal oxide arresters, and fully insulated composite jackets. Metal oxide arresters, detachable arresters, etc.

3. Difference in scope of application: Lightning arresters are suitable for overvoltage protection of transformers, transmission lines, distribution panels, switch cabinets, power metering boxes, vacuum switches, parallel compensation capacitors, rotating electrical machines and semiconductor devices. The protection range of one lightning rod is when the height of the lightning rod h≤hr.

4. Principle difference: The lightning protection of a lightning rod is that it can guide lightning from above the protective object to itself and discharge it into the earth through itself. Therefore, its lightning inducing performance and discharge performance are crucial; the role of lightning arrester It is used to protect various electrical equipment in the power system from damage caused by lightning overvoltage, operating overvoltage, and power frequency transient overvoltage impact.