Joe Allen posted:Hi George,
The only Z-4000 rated at165 VA was the first run from March 1998. The ones from the second run on are rated 180 VA. I have both and they have 12 amp breakers.
If you are using the Z-4000 side receiver, it will shut down the transformer at 9 volts with the least little short or spark extremely quick, which I use most of the time.
Using the Z-4000 without the side receiver you should be able to run up to 11 to 12 amps with no problem, at least I can. I just got a chance to make sure I was right by running 3 loops and 3 engines plus passenger cars on 1 TIU channel today without the side receiver.
Hi Joe,
Running 12 amps at 18 volts would be 216 watts, which would exceed the rating of the unit. If the amp rating actually controls the unit, which I doubt, the most you could theoretically run at 12 amps would be 15 volts. Most people run command (DCS with a TIU) at 18 volts. That means the breaker is over-rated at 12 amps. It should be 10 amps, unless there is circuitry in the Z4000 that prevents it from driving to 12 amps at 18 volts. This is Watt's law.
George
