> Very very serious
> AC switches
> UTILISE arcs. When a substation contactor opens an arc occurs which is
> channelled up an arc extinguisher. This is a pair of electrodes which
> diverge mechanically. The arc rises thermally and the path
> gets longer until
> too late it realises that it was all a trap and the air path
> cannot support
> its ever increasing length and bzzzzzzz....
> It extinguishes.

Sounds just like a Jacob's Ladder !  So there IS a practical use for what I
thought was just a fun toy ;)

Rgs
Ian

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