gunrunnerjohn posted:Well, two different people have told me that they repeatedly blow the 20A fuse in the TIU with the Z-1000 brick as input, it has, I believe, a 6A breaker! The reason the TIU has that fuse it to protect against excessive current through the traces. FWIW, the fuse in the TIU is a fast blowing fuse.
IMO, if you're blowing even a 10A slow-blow fuse, you need to address the reason why, not increase the size of the fuse.
I know why the fuses blow, derailments caused by Grandkids, my switching ability prowess or lack thereof and an issue I have with one of my NJ switch machine's leaf contacts. I'd just like the easy to reset breakers to pop instead of the pita due to location fuses. So, most fuse pops are dead short derailments. Since this is a race condition, maybe at test is in order. I could jumper out the TIU. Start with a 10 A slow blow, short the track and see what happens. If the fuse goes first, I could up the anti to 15 A slow blow and repeat the test. If, the fuse still blows, I might as well stick with the 10 A fast blow. Postwar ZW 's feed my TIU's.
I do have 5 A breakers in series with 10 A fast blow fuses fed by a Z1000 powering individual trolley lines. The breaker pops first with derailment.
