@turkey_hollow_rr posted:I apologize if my information is dated about PSX and the DCS signal. Still, however, if the PSX is that much faster than the ph 180 breaker I can't see any advantage to having one after the TIU. It will protect just as well placed before the TIU I would think.
I don’t see any way the PSX AC can be any faster than a 180 watt brick. This is for AC not DC. AC passes through zero 120 times a second. You can’t sense a short circuit when there is no current. Only as it approaches max voltage can it sense a change in current.
On a DC layout it can respond faster than 8 ms but not AC.
Folks using these after a modern transformer, they are really only useful if you want to limit the current on a section to less than ten amps which is what a modern higher power transformer of at least 180 watts trips at.
Want to turn your Post War ZW into a modern transformer? Use a PSX1-AC.
Pete
