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

That breaker does not have any mounting or connecting hardware - you will need an additional socket like the BP/HHU pictured below. It has a mounting hole in the cap that may mount in the same place as the ZW-232. I would also stick to the stock 15 AMP rating for the breaker, but being a socket setup, you could easily swap out if you find it necessary. At these relatively toy voltages and currents, the 14V rating may slightly de-rate the breakers amperage rating at higher voltages, about 7.7 amps at 18V, but would be perfectly acceptable.