Take any ZW you have to an antique store. The red light for a short won’t activate to cut power until the transformer overheats. That should take about 25 seconds. Your equipment will be damaged after 1 second or less. Works great with post war though.
I've been powering my DCS/TMCC layout with a Postwar ZW. I have automotive 10 amp fast blow fuses (ATO type) between the TIU power ("hot") input and the ZW output. No issues.