Reply to "Post war ZW transformer circuit breaker pops after 5 - 10 minutes of running 3 trains simultaneously; what's up?"

I use the 1.5KE36CA TVS diodes. Additionally, the smoke may indicate a loose contact in the arm and account for increased current draw under higher loads. 15 amp is the correct size breaker for the internal breaker, and is meant to protect the transformer, not the items it powers. Smaller breakers on each output is definitely the way to go in addition to the properly servicing the internals of the ZW.