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Substation Equipment: Lightning Arresters
 
Lightning Arresters
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 1. Lightning arresters on bus structures
Figure 2. Lightning arrester on distribution pole transformer
Figure 2. Lightning arrester on distribution pole transformer
 
Figure 3. Lightning arresters
Figure 3. Lightning arresters
Figure 4. Lightning arrester on substation power transformer
Figure 4. Lightning arrester on substation power transformer
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