Please see below an informal case study involving the recent use of a DFA recurrent fault report to learn of and locate a tree branch that was hanging on a line. The utility person learned of the recurrent fault, from the DFA website, when he came into work in the morning. The problem was located and corrected by late morning.
Also below is an older, published case study that details a situation in which a utility similarly had a tree branch hanging on a line. In that case, the utility was unaware of the condition. The consequence was that the line burned down. The two cases provide a good side-by-side comparison of what happens today on circuits that do not have DFA, versus what can be done when the utility has DFA-provided awareness
Use of DFA to Learn of and Locate Tree Branch on Line
A broken tree branch hung on a single-phase line, representing an incipient fault that caused four faults over a period of ten hours. The DFA technology system provided the utility’s only notice of the problem. Prompted by DFA, the utility used DFA and the circuit model to efficiently locate and correct the problem. The problem was resolved less than 24 hours after it began, with minimal crew effort, saving the circuit’s customers from additional interruptions and a possible outage, and preventing additional damage to utility infrastructure.
Tree Limb Burns Down Line, Causes Outage
DFA Technology Could Have Prevented Damage, Outage