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Hi OGR Group,

Please read and advise 'what is really needed' ... I am building this new layout with only conventional experience from 30 years ago ...

I go back and forth on my questions below even after several unclear replies from Lionel. My uncertainties are:

(1) do I need PowerMasters between the ZW(L) and track? I think not as I understand they are built into that transformer).

(2) Do need PowerMassters between the either of the ZW(R) transformers and what they run? I think maybe the first ZW(R) below, but unsure as most everything will be some level of set voltage? See details below.

(3) do I need TMCC Lockons between either the ZW(L) and the track, or between the ZW(R)s and  what they are running? See details below.

BACKGROUND DETAILS:

My Operating intent: will run newer Legacy and Vision engines/trains, as well as older post-war engines/trains, possibly in conventional mode. Here's my current environment, control & transformers setup:

- Have Legacy CAB II control (the '990' product and the '993' expansion product. All track is Fastrack. Layout is 24' x 24' in size.

- One new ZW(L) transformer to run four loops: two Main Line on A- and D- terminals, one minor sub-loop off one Main on B- terminal, one separate Trolley line off standalone C- terminal. All terminals  will be on Common Ground.

- One fully refurbished post-war ZW(R) - 275 watt with plans for terminals: 14v for switches on A- terminal, 14v for uncouple and operating track on B-terminal, track signals and crossing signals on 14v C- terminal, and LCS device power for WIFI, ASC2, BPC2, and Sensor Tracks. All terminals  will be on Common Ground.

- One fully refurbished post-war ZW(R) - 275 watt wit plans for terminals: A- for lights to streets, B- for lights to buildings, C- for lower/constant voltage for accessories, D- for possible higher voltage needing accessories. May or may not need to be on Common Ground.

THANKS IN ADVANCE FOR READING AND OFFERING YOUR VIEWS!

- Ken

Original Post

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No Powermasters are necessary for the ZW-L. It has PM features built in. If you have good circuit protection in your refurbished Postwar ZWs, you will not need the lock-ons. The ZW-L has superior circuit protection over the lock-ons, so you will not need lock-ons for that either.

Have all transformer outputs with common ground. Common ground makes things easier and faster to wire. Also, phase all transformers together. Lionel has a video that shows how to do that.

If you have good circuit protection in your refurbished Postwar ZWs, you will not need the lock-ons.

Dylan's right on the mark, but ...

Unfortunately "Good circuit protection in your refurbished Postwar ZWs" won't fit inside those ZW's.  But you do have several alternatives, and you've mentioned one of them, the TMCC Lock-On.

Some folks here don't like them because they reset automatically, with no manual reset option, but their main purpose is to cut current flow quickly and they do this well enough.

You can also use an in-line circuit breaker, but it has to be fast.  There are several recommendations and many threads on the forum covering this approach.  Suggested breakers are either Lionel No. 91 from back in the day (postwar), or Airpax PP11 Series (Instant Trip):

Airpax Large

Another alternative is a PSX-1 AC, but these will only work above 10 VAC, in other words only for command control applications.

Which ever you choose, all of these will be located external to the ZW's; no two ways about it.

Mike

Last edited by Mellow Hudson Mike

Thank you both 'Dylan the Train Man' and 'Mellow Hudson Mike' for your replies.

Glad to have your combined practiced expertise and confirmation that the ZW(L) has the Powermasters built in as I heard of them. Believe it or not I had Lionel tell me once no I did not need them, them later another time yes I do need them - so thank you!

While I have a lot of faith in the two refurbished ZW(R)s I have acquired - which were in effect broken down and fully cleaned and upgraded as much as possible on the inside - I am going to go with the TMCC Lockons initially. Their fast-shut off will help at least until I get more electrically sophisticated myself ... these TMCC Lockons will help prevent against my own learning break-in possible mistakes with Legacy, along with what I hope to be my young grandchildren's break-in usage. I will learn more about the Airpax PP11 Series (Instant Trip) as I suspect they could be used around the layout in key spots.

Happy railroading guys!

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