I will remove the "voltage:primary" and "voltage:secondary".

Many transmission "lines" have two circuits (6 cables).  Each circuit is named for the terminating substations.  Many times, the circuit on one side of the towers has a different termination substations than the circuit on the other side of the towers.  Therefore, there are four names.  "A-B;C-D

https://www.itc-holdings.com/projects-and-initiatives/project-detail/meyer-substation
