[Gllug] OT: Merging UPS outputs

[Chris Hunter]

John Winters wrote:

> 15A plugs are used in theatres for a very simple reason - they don't
> have fuses in them.  Every time a bulb blows it will take the fuse out
> and a single lantern might be connected through several pieces of tail,
> each with a plug and socket.  Working through all of those to replace
> the fuses would be impossible.  Instead each circuit is individually
> fused back at the dimmer rack (with special fast-blow fuses to protect
> the dimmers) so you know exactly where to go to replace the fuse.

There are NO fuses that fail fast enough to protect triacs!  The only 
way is to use grossly over-rated triacs, or to use a different approach 
- back-to-back thyristors.

Chris


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