View single post by oztrainz
 Posted: Tue Nov 22nd, 2016 02:58 am
PMQuoteReplyFull Topic
oztrainz



Joined: Wed Apr 10th, 2013
Location: Unanderra, Australia
Posts: 935
Status: 
Offline
Hi Peter,
having let he magic smoke out of a Peco side-mount Peco point motor as shown below, earlier this year with straight AC and being surprised by how hot these coils can get in how short a time, I'd suggest the Peco CDU. The culprit was a single strand of wire that bridges across the switch contacts. I forgot to put my high-power spec on when soldering the wires to the switch when testing without a CDU :doh:)



Now I fire my points with Jaycar push button switches for each path like https://www.jaycar.com.au/black-miniature-pushbutton-spst-momentary-action-125v-1a-rating/p/SP0711 in tandem with a larger push button switch like
The reason for the double switch approach is that one of the clubs I was with had some of the smaller switches fail from burned contacts over prolonged use with a CDU. The work around was to close the small switch first then dump the current through it by closing the higher-rated larger switch. This defeated the problem.

I hope that this makes some sense for you,



____________________
Regards,
John Garaty
Unanderra in oz
Close Window