I want to install a tvs, but i am not sure if it should go on transformer,or on the power master,also can someone post a picture on how this is done. There was a thread recently, but i could not find it,i would appreciate any help. thank you very much.
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Dale,does it make any difference if the tvs goes on the transformer or powermaster?
No but it should be on the track side of an external breaker or fuse if used. that way there is still a path to common for a spike if the breaker trips.
Dale H
Thanks Dale, i appreciate your help.
FWIW, although I don't see universal agreement, I believe the best place for the TVS is directly across the pickups of each locomotive. The closer it is to the circuitry being protected, the better. I'm not saying it isn't effective across the tracks, just that IMO it's better to protect each locomotive.
John's suggestion is a good one adding one to each loco, but a lot of people will not go to the trouble. However 1 on the loop is a lot better than doing nothing.
Dale H
I have always advocated a second TVS wired between the engine frame and pickup wire as the ultimate protection. However many, if not most, will be reluctant to open an engine and install the TVS. [At my age I am far too shakey to fool with engine innards]
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So, I believe the first priorty is at the transformer or just downstream, beyond external fuse or breaker protection, at a T-strip as Dale suggested. Voltage spikes emerge from the transformer itself and nearby is a good place to snub one.
I certainly don't disagree Dewey, any protection from transients is better than none. I use the belt-n-suspenders approach, I am putting them in all the locomotives and tenders with electronics, and also wiring them across each output to the track. I agree that the place for them is on the track side of any over-current protection.
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