Zig-zag configuration for ring-bus substation

THE NEW HEDGE SUBSTATION of Sacramento Municipal Utility District, located a few miles southeast of Sacramento, Calif., is designed to receive firming power over two lines from Pacific Gas and Electric Company plus substantial amounts of power from the U. S. Bureau of Reclamation Central Valley Project and from the new Upper American River Project, all at number of disconnecting switches and insulation points is small; extra buses are not required; relaying is not overly difficult; and when a line is disconnected the ring may still be closed.