content: Most faults are not permenant. Many tripping schemes will include one or more automatic reclose cycles. Power lines are protected by relay devices that are not unlike a computer with input signals from the power system. These devices detect directionality of power flow as well as distance of the fault based on measured impedance. If the fault is calculated to be in the relay's "zone of protection" it will trip the breaker. If the fault is on a single phase, it will then attempt to reclose the breaker in an attempt to keep the line in service in the event of a transient fault (lightning strike, branch falling, squirrel making contact and subsequently exploding, etc). If the relay no longer detects a fault, it will keep the breaker closed. The scheme may be designed to do this several times before "lockout" at which point it will no longer attempt to close the breaker and keep the line out of service. The interval between when the line is cleared and when a reclose is attempted (open interval) is unusually long in this case. This may be because the line is a lower voltage distribution line and the scheme was designed with a longer open interval or it may be the result of an operator attempting to manually close the line to see if it will stay in service. For a higher voltage transmission line, the open interval is usually 0.2s to a little over 1 second. EDIT: On second view, the open interval doesn't seem all that long. This is likely the result of an automatic reclose. Typically you don't see a scheme with this many automatic reclose attempts though. I think something is wrong with the logic used to implement reclosing in this case and it is never reaching lockout state. It could be related to how long it takes the scheme to trip. The reset time may be satisfied before the relay trips the line out again so that each reclose appears to be the first attempt to the reclosing relay. Reset times are usually set in the order of minutes but it could be set incorrectly in this case. Perhaps the engineer set it to 5 in this case meaning 5 minutes, but the actual setting is in cycles (60cycles/sec) so the reset time would then be around 0.08s by mistake. Generally, if someone has enough time to take out their phone and start recording a fault, something is not operating as intended.