Reply to Think the power lines get buried now?

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[quote=Anonymous][quote=Anonymous]Correct me but I thought buried power lines meant that when there are issues they have to dig and that means longer outages, more costly and so on. Is that not right?[/quote]

Mean Time Between Failures (MTBF) for underground utilities in nearly all places are 8 years or longer, versus several months for above ground utilities on poles.

Mean Time to Repair (MTTR) varies with the root cause of the fault.  For underground power, the fault -nearly always- is substation damage (e.g., blown circuit breaker), which is repaired as a very high priority (and also usually is repaired very quickly). For above ground, many many faults are tree damage in the last mile, which is lower priority and usually longer outage before repair is complete, but they also suffer from substation damage of course.

Generally, actions which restore more customers faster are the higher priority tasks for the limited set of utility crews.

So, the quoted text about longer outages is not really right.[/quote]

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