On 6 January 2016 at 02:05, Gene Heskett <ghesk...@wdtv.com> wrote: > What do you think? Is that a safe and workable idea?
I have seen NC SSRs. I don't know how they do it, and they are expensive. I have been using normally-closed mechanical relays to do this, with a 240V coil connected to incoming power. Ideally it needs to be a force-guided relay, with the main power feed (or surrogate thereof) through a second set of terminals so that if the cap-drain contacts weld shut you can't power up the system with the drain resistor in circuit. You have to ensure that the PSU isn't powered up until the caps are discharged. I do this in HAL because my drives feed-back bus voltage to HAL. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
