I was running my eight car Daylight Special consist of K-Line 18" heavyweights and a Williams GS-4 and after approximately 8-12 laps around the track the breaker on my Z-1000 would trip. Of course, the train would stop. After about 20 seconds the breaker would reset itself and the train was good for another dozen laps or so.
I took the problem to the techie at my LHS and this is what he told me.
Each cars has four lights. So, that is 8 x 4 or 32 separate bulbs. As they heat they draw more current and exceed, along with the engine, the capacity of the Z-1000's breaker.
He said that the breaker gets a little more sensitive with age. It might be 5 or 6 years old by my best recollection.
His suggested solution was to either reduce the number of cars on the train or replace the bulbs with LED's.
What do you think?