I've had problems with SSRs shorting out in certain applications. Because of that I limit the use of SSRs to simply switching power to a load and that is it. For instance; they are very useful for driving heaters for time proportioned outputs schemes to control heat output. I also use them when switching heavy DC heavy loads (of course the SSRs must be rated for DC to do that).
Other than that, I avoid them and use plain old contactors and relays. If a relay is properly sized, and not cycled beyond specifications, they will last a very long, and predictable time. Avoid the super cheap relays and contactors. I have used hundreds of the Automation Direct relays and contactors over the last few years and I can only think of one that was bad out of the box. I don't know if you can get Automation Direct products in the UK or not? Dave On 5/2/2016 9:09 PM, andy pugh wrote: > On 3 May 2016 at 02:05, andy pugh <bodge...@gmail.com> wrote: >> knows a good place to ask. > Addendum: Good places would be places where the question gets answered > with reasoned arguments, not statements that "that is not to code" > (unless backed up with an explanation about what the code is based > on). > > (Sorry, had a bad time on another forum recently where any suggestion > of actually experimenting with mains voltage prompted strangely > vehement vituperation) > ------------------------------------------------------------------------------ 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
