@gunrunnerjohn posted:Well, the PSX-AC is solid state switching, so in theory it could interrupt power in microseconds. The PH180 has electronic sensing, but a relay is actually used to interrupt the power, so it's reaction time is probably a few milliseconds.
I don't really know if the difference is all that significant as far as failure rates of locomotives is concerned. I personally consider the protection of the PH180 circuit breakers sufficient for my use.
I've never had an issue with the circuit breakers on my PH180s letting anything die. I also don't see the need to add a PSX-AC in front of them.
To be honest most failed modern circuit boards I've seen have been caused by the combo of Postwar ZW and no other circuit protection.
