Entering such a section, the power supply from the substation used before entering the section is utilized initially, but when the entrance of the train to the section is detected, the power supply is switched to the one from the substation on the other side.
最初は進入側の変電所から饋電し、列車が切替区間に入ったことを検知すると進出側の変電所からの饋電に切り替える。