Peter Blodow wrote: > I hoped Jim Coleman would be the one looking like an idiot.... but > couldn't someone explain to a poor non-US citizen what kind of animals > RCD and GFCI are? Is there an abbreviation of Aggressive Acronyme > Addiction, maybe AAA? > In the US, we have GFI (ground Fault Interrupter) and GFCI (Ground Fault Circuit Interrupter) the same thing, compares current on line and neutral, and if they differ by more than a small amount, cuts off power very quickly.
The British have apparently had several names for them over the years, the current one seems to be RCD (Residual Current Disconnect), as far as I know they work identically to the US version. I'm sure other countries have their own acronyms for the same type of device. There are also similar units used all the way up to high tension transmission feeders, and they still work pretty much the same way. They have a balance transformer at each end, with three coils, so the three delta mains are equally centered to ground. If a tree branch touches one wire, it unbalances the main, and current flows in the balance transformer, tripping the GFI. Jon ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
