On Sun, 02 Feb 2014 18:07:19 +0000, GB wrote:

Saves the DNO having to send an engineer out to reset after
transient
faults like lightning or a small branch touching the line.

Does the small branch cease to exist after the first touch (what a way
to go, in a puff of smoke!), or what stops it touching the line again?

As you summise a small branch gets exploded. There is a lot of energy
available from an 11kV line, just 100 A fault current @ 11 kV is 1.1
MW of power. A branch doesn't stand a chance...


--
Cheers
Dave.