My layout has two loops, an inner and and outer. A train can pass from the inner loop to the outer loop via either of two pairs of switches. The center rails are electrically isolated via fiber pins where the switches meet, so I can operate two conventional trains simultaneously.
Each loop has its own transformer, which I think are phased properly because nothing has blown up yet.
What is the proper way to traverse from one loop to the other? Ideally I would like the train to scoot across and continue on without disruption, but I am worried that having both transformers powered would cause some sort of problem in the moment when the pickup rollers are on opposite sides of the fiber pin.
Right now, I let the locomotive coast across the border until it loses power, power down the first transformer, then power up the other transformer. Of course, the locomotive then goes into neutral or reverses direction so there's a mad dash to stop it before it backs up too far...