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

To me.  the ZW is limited to two trains because it only has two large handles for control.  The other two small handles could ( theoretically ) be used to run two more trains but the two small handles are poorly placed and hard to get at easily,  so the small handles are better  used to just run accessories at a fixed voltage.