Gapless Lightning Arrester

Why was the gapless ZnO arrester developed over the valve-type lightning arrester? In valve-type lightning arresters, spark gaps are connected in series with non-linear resistors. This is necessary because silicon carbide (SiC) has a relatively low non-linearity coefficient (α ≈ 5–7). As a result, the knee point in the V–I characteristic of an SiC resistor … Read more