> On 3 May 2016 at 10:14, Nicklas Karlsson <[email protected]> wrote: > > If Solid State Relay SSR happen to be a thyristor it will only allow a > > limited dv/dt or it will fail to turn off. A common source of dv/dt is > > inductive or maybe capacitive load and it happens because a thyristor turn > > off at zero current although a reactive load do not have zero voltage at > > zero current. Problem is circumvented by a properly sized capacitor in > > parallel to limit voltage rise during turn off. > > How would one determine "properly sized"?
C*du/dt = i <=> du/dt = i/C In other words i/C should be less than maximum allowed du/dt. Problem might also be because you discharge a voltage into a capacitor and get a very large inrush current but this require a different solution. ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
