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Hello.  I've got a question regarding my current setup.  I am dipping my toe into command control and I think I am using more juice than my Powerhouse/Powermaster can handle.

I have a simple loop of track that is about 45 feet around, two TMCC locomotives ( a PRR S-1 and a NYC Dreyfuss Hudson) each with 6 lighted passenger cars (Williams Crown Line Edition 20" aluminum cars).  They are all equipped with power-sucking incandescent bulbs.  I'm running the whole thing with a CAB1 base and remote and powering it with a 180W Powerhouse and a switchable Powermaster.

After I got it all set up, the Powermaster tripped immediately when flipping the switch on.  I can run both trains for a while with only three cars on each.  They go for  while , but eventually the Powermaster has enough.  Usually once they start picking up speed.  My assumption is that I'm drawing too much amperage with my antiquated lighting.  I'm planning to convert at least the passenger cars to led lighting in the future.

My questions are:

Am I harming my locomotives when it all shuts down?  Or my Powermaster?

Do I need more juice to the track?  

I'm slowly collecting equipment and track to eventually build a larger layout with a couple mainlines, reversing loops and a siding.  Nothing too huge, but more fun than an oval.  I'm beginning to realize the wiring will be more complicated than I originally thought and the power demands for these two trains might be more than I bargained for.  

Thanks!

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Running too low on amps is not good for motors either. They can get hot,need more volts, etc.

The led swap can get you an amp or so back. Each bulb has an amp rating (or watt) add them up (watts convert to amp @ X volts, etc) to see how much they eat (watch for decimals). It's that simple. (leds use milliamps)

A motor will also have a "peak amp" reached during starts/accelration/heavy loads/etc. This can be quite high on some, low on others. We often just speak of continuous amps; leave some excess for peaks. (You should only expect to use about 70%-80% of an electrical rating, leave a 20%+ margin for error unless you have big confidence; to account for for quality, and/or heat issues) There was something else too, but fighting spellwreck AND keeping my mind on electrical is maddening today.... sorry.

Anyhow, the new age transformers don't like big peaks. They assume too fast that there is a short. Go easy raising throttles, that should help.

Once at speed the amp use should drop off, however it is possible the back EMF of modern units might cause some variance to that drop off. (? kinda deep/design question)

Sitting down with a meter to watch, and the roster to run can be a very useful learning experience.  More useful than explaining some things that really need some experience to get anyhow. Simply read the meter and react to that .

 

The LED lighting in the passenger cars will certainly make a huge difference.  The typical passenger car with incandescent lighting consumes 1/3 to 1/2 amp of current.  Put a dozen on the tracks, and that can be more than half the 10 amps of current you have available!

bmoran4 posted:

It would be wise to measure the current draw to confirm your suspicions vs. just jumping in.

This is never a bad idea, while it seems likely that you have excessive current draw, a $15 clamp-on current meter from Harbor Freight is a very useful tool to have around the layout.

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