He’s using a flyback transformer with a zero voltage switching (ZVS) driver. This produces about 50 kV, which is more than enough to toast the marshmallow. ZVS is a technique that triggers the ...

This is achieved by providing power from Traction Substations (TSS) using 50 KV transformers, with intermediate autotransformers supplying 25 KV power to the rolling stock. This system ensures ...