One aspect of 3-phase power metrology that’s not very well-known is that it’s possible to fully quantify the system with just 2 voltage/current measurements. This is commonly referred to as a, “corner grounded delta” configuration or sometimes as the “two meter method.” One day I decided to see if I could derive this from first principles on my white board and got lucky on the first try. This is a picture of my derivation which my colleagues jokingly called, “Yaney’s Conjecture.” [read full article]