Is Your Transformer OK? Enhanced safety is the reason PG&E has internal fault detection on all new overhead transformers

摘要

Catastrophic failure of an overhead transformer is a rare occurrence, but it does happen. Electrical systems are designed so protective devices, like fuses, operate first and protect more important devices, like transformers. A blown fuse is not uncommon and can be caused by several fault conditions: wildlife getting between energized conductors, cars hitting utility poles, lightning strikes and overloaded circuits.