What feature is designed to protect a distribution transformer from lightning?

A lightning arrester serves a critical function in protecting distribution transformers from the damaging effects of lightning strikes. When lightning hits power lines or nearby infrastructure, it can cause a massive surge of electrical energy. The lightning arrester acts as a protective device that diverts this excess voltage away from the transformer and safely grounds it, thereby preventing electrical overloads and potential damage.

In contrast, while a fuse link is designed to protect against overload and short circuits, it doesn't specifically target the transient voltages caused by lightning. A surge suppressor, although it also aims to protect electrical equipment from voltage spikes, typically functions in a slightly different context and may not directly address the unique characteristics of lightning-induced surges. Grounding rods provide a path for electrical current to safely dissipate into the ground but do not actively engage during transient lightning events unless integrated with other protective measures.

Thus, the role of the lightning arrester is specialized for handling the unique and sudden influx of energy from lightning strikes, making it the most appropriate choice for protecting distribution transformers from these specific risks.