Reply to "TIU and power supply problem"

Engineer-JoeOGR Forum Member SUPPORTING MEMBER

@gunrunnerjohn posted:
....
I've seen a failure of the circuit protection in one PH180 in our modular train club layout, but it was a random component failure, not the result of any abuse.

So the TVS failed shorted, and (possibly) took out the PH180?

Could the PH180 have taken out the TVS somehow?

This seems interesting to me. The PH180s seem to trip so fast, and for lighter reasons than anything else I have. I have inline fuses on my circuits and the breakers on the PH180 will trip first. The Z4000 for example, will keep supplying power on the same circuit for longer periods, depending on the short?

I mainly run 2 rail and haven't lost an internal TVS yet, after maybe 15 + years. I have changed out plenty of external 10 amp auto fuses using different power supplies. So I use them even on the PH180 circuits.

4/4/219:27 AM

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