Well, I have settled the issue with the voltage. I now have a new problem. My outer loop is on one VAR output and the inner loop is on the second VAR. They are interconnected by two pairs of switches. When an engine crosses the switches to go from one loop to the other, the power to the estimation loop dies. Between each pair of switches is a short track section which has the cut center rail and I have removed the jumper between the two outer rails. Am I trying to do something that just isn’t possible?