posted on Mar, 14 2011 @ 05:40 AM
This sounds very much like flashes from a fault on an overhead high voltage feeder caused by contact with a branch or an animal/bird (possums in
particular) and these usually have auto-reclosers which reclose the circuit breaker at the supply end a short time after it trips (as little as 5
seconds and up to a minute or so). We have multi-shot auto reclose relays in remote areas which will attempt as many as 10 recloses before locking
out in an attempt to blast the fault off the line. A locked out feeder requires a patrol to locate the fault and clear it before supply can be
restored (takes a long time) with a very good chance of a phase conductor being broken and on the ground requiring re-stringing.
The flashes from those faults light up the sky at night in a spectacular fashion and are visible from many miles away especially when there's any
cloud cover or mist in the air.