This is clearly ancient history but: many years ago in a time before time .... a guy needed a CC device to light orchard heaters. Nichrome coiled elements in series; must touch off either oil or propane. It used an off-the-shelf SCR feeding (ugh!) an 240 v to 440 v transformer. Indeed the dv/dt's were horrible. Still I got by with plain SCR's not the radar spec ones. On short strings they switched for only about 6 degrees. Amazing what one can do (it helps to be young and dumb and poor) and that was 45 years ago. The project got dumped, I suspect, simply because of liability. However, one could light off 20 A of orchard in about 5 min.
Dave On 05/03/2016 10:39 AM, andy pugh wrote: > On 3 May 2016 at 18:16, Jon Elson <el...@pico-systems.com> wrote: >> Are these name-brand SSRs >> or some china noname units you got on eBay? > Well, the labels say "Fotek" but then the labels are peeling off, and > I today found web pages talking about fake Fotek SSRs. > > Having taken one apart, the triac in my 40-Amp SSR is a BTA16-800B so > rated at 800V (good) but only 16A (bad) > Of course, it isn't necessarily even a real triac :-) > ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
