Lightning arresters are protective devices for limiting surge voltages due to lightning strikes or equipment faults or other events, to prevent damage to equipment and disruption of service. Also called surge arresters.
Lightning arresters are installed on many different pieces of equipment such as power poles and towers, power transformers, circuit breakers, bus structures, and steel superstructures in substations.
 Figure 1. Lightning arresters on bus structures |
 Figure 2. Lightning arrester on distribution pole transformer |
 Figure 3. Lightning arresters |
 Figure 4. Lightning arrester on substation power transformer |
