On Sun, 21 Jan 2018 19:17:23 -0000, James Wilkinson Sword wrote:

What, even when Toothless Dave brings down the overhead line to
my
house with the combine?

One assumes the DNO will come along and repair the line. Which
will
need that section to be isolated and thus will be recorded. The
auto-recloser feeding that section will also have phoned home to
say
it's tripped or (hopefully) locked out.

If it takes out more than one house perhaps.

Unlikely that an auto-recloser will only be feeding one house unless
that house is the only place supplied on the end of a long line,
think miles.

Auto-reclosers tend to be near the primary substation that is feeding
the 11 kV distribution lines for an area. Those lines can be tens of
miles long and made of multiple sections with interconnects between
different lines. Some interconnects may have an auto-recloser but
most are just an manual air switch. Not sure how they "phone home"
but as they are all connected back to the primary substation the
obvious way to achieve the first hop is over the power lines.

--
Cheers
Dave.