A Needle In A Haystack
Late winter and early spring weather in Nebraska can range from devasting blizzard conditions all the way to higher temperatures that haven’t been reached since last fall. They can include high humidity or drought and dry conditions.
Regardless of the timing, the weather in Nebraska is famous for changing significantly in a short period of time.
During one spring week a customer reported 3 early morning outages over the course of 4 consecutive days. As a customer, it can be quite frustrating to call in over and over again. Especially after normal operating hours and waiting for a crew to respond before getting your own day started.
It can be equally frustrating for a crew to respond to the same location multiple times without finding an obvious reason for the outage. But there are simply times that finding and repairing the cause can be like finding a needle in a haystack.
Most of the time, crews are looking for something obvious that may have broken along the line. Poles, wires or insulators broken or out of place are easy to spot and usually indicative of the problem.
However, it is not entirely unusual for a responding crew to arrive and find nothing out of the ordinary along the stretch of line believed to be the source of the fault. In our industry the events themselves are usually caused by one of three things: man, machine or environment. Weather, wild animals, heavy equipment and human interactions that may have caused this outage could be long gone by the time the utility crews arrive leaving no evidence of their activities. Large birds, critters, vehicles or even high humidity exposing an opportunity for a fault might not be visible during line patrol.
Such was the case as indicated by the pictures you see here. After the 3rd call, lines were isolated and non-residential services were disconnected for about a week to allow for a pole-top to pole-top inspection of the area suspected to be near the source of the outage.
An intact insulator that became dirty and corroded and a steel cutout that carried the fault searching for ground, the top of the pole was eventually determined to be the culprit. Without a broken insulator, hanging wire or electrical arcing visible from the ground line patrol at 3:00 am, this was a cause crews were simply unable to observe. The high humidity of fog or precipitation in the air was a contributing factor. However once the fog lifted and weather conditions were normal, this was not detectible. The burn mark on the outside of the pole seems insignificant, but to a trained eye, it signifies a problem.


