On Mon, 1 Apr 2019 at 23:18, David C Brown wrote: > I have now read the article and the test installation used required, > because of frequency of large farm machinery, the cables to be buried. = I > would be very cautious about burying 2kV cables directly into the ground > without substantial protection, which would tent to detract from the > el-cheapo diy approach expounded in the article. > > Implementation details left as an exercise for the student :-). Using beer bottle insulators and #12 fencing wire (possibly with a ground return :-) ) one could get "a few kilometres" at acceptable losses with a 2 kVish overhead line. The great gain is of course from the I^2R losses (especially if the target system is 120 VAC based as in the paper) so that you get a loss reduction of (Vhv/Vlv)^2. For say 2000 V and 120 V that's ~=3D 275:1 and even at 230 VAC it's a 75 x reduction in losses. Discovering 2000 VAC on a beer bottle insulated overhead line may be "a bit of a shock". Russell --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .