Lightning arresters are essential protective devices used in electrical systems to safeguard equipment from voltage surges caused by lightning strikes or switching events. They divert excess voltage to the ground, preventing damage to sensitive components. Common types include rod gaps, expulsion arresters, and metal-oxide varistors (MOVs). Key features include high discharge capacity, fast response time, and durability. Typical products in this category may include surge protectors, distribution-class arresters, station-class arresters, and transient voltage suppressors. These devices are critical for ensuring the reliability and longevity of automation systems, power distribution networks, and industrial machinery.