Much ado about nothing.
The guy is powering each TIU channel from a separate postwar ZW and is
worried about bridging power districts when an engine or passenger car
sits across the rail gap between two power districts. When the bridging
a gap occurs he is paralleling the outputs from two ZW's. This should
only be an issue if there is a short circuit at the same time as the
engine or passenger car rollers are bridging the gap. The two ZW's being
in parallel increases the current available for the short. The fix is to
use good circuit breakers on the output of each ZW. The 7 amp thermal
breakers he is using are probably too slow so he should use some kind of
fast acting electronic breaker like a PSX-AC on each ZW output.
However, why do that when he would be far better off buying one Lionel
PH180 transformer and using it to power all four channels. The breaker
on the PH is one of the best I've ever seen. It will trip on any short
no mater how minor. The 10 amp output from a PH180 should be enough to
run a lot of trains. I use just one PH feeding 3 TIU channels. If 10
amps isn't enough, get two and feed two channels with one PH. Postwar
ZW's should be used for the postwar AC motored trains they were designed
for.
Ken
On 6/15/2018 1:15 PM, Thomas Gilsdorf wrote:
I read it. As I understand Barry's answer, this is a non-issue. My layout has four transformers, power districts, and fixed TIU channels
Thomas Gilsdorf
tlg225ccr94@xxxxxxxxxxx
-----Original Message-----
From: Peter Condro <pcondro@xxxxxxxxx>
To: rc3r <rc3r@xxxxxxxxxxxxx>
Sent: Fri, Jun 15, 2018 8:44 am
Subject: [rc3r] Has anyone seen this TIU power thread?
https://ogrforum.ogaugerr.com/topic/power-districts-w-separate-power-supplies-negatively-impact-tius?reply=79987520860883019#79987520860883019
.......and what do u think?
Peter
Sent from my iPad
