I believe the The Lionel TMCC Direct Lockon SKU: 6-34120 (135W setting) breaker's trip current would a bit too high to provide adequate protection with the Z-1000.
There are a few electrical fundamentals in addition to the trip delay time one should understand when choosing a breaker. The transformer Output ratings are a good place to start. Here's what they mean:
Volts - (electrical energy potential) in Conventional operation this sets the train speed.
Amps (current flow) - More Locos, cars and such (and shorts) pull more current through the circuit from the transformer. The transformer only delivers as much current as required by the load, up to a point. This point is it's Output rating.
AC Transformer Output ratings are usually given in either Watts or VoltAmps, both of which have essentially the same meaning when choosing breaker size.
Watts = Volts x Amps = VA or Watts/Volts = Amps
From the MTH website: Z-1000 Owner's Manual
It shows a 6Amp breaker inside the transformer housing. This is presumably a thermal (slower) breaker designed to protect the transformer from overload.
Output: 14VAC 80W
18VAC 100W
Current at 18V = 5.56 Amps, or at 14V = 5.7 Amps
Given all this information, if you are interested in providing faster protection than the Z-1000 internal 6A thermal breaker, I believe the 5A Airpax Instant might be a good choice for you, especially if you also add TVS protection are recommended.
PP11-0-5.00A-OB-V https://www.onlinecomponents.c...00aobv-10090638.html
I hope this helps.
