Design for Repair East Substation Yokota Air Base

Included in the project was the electrical design to replace an existing 66 kilovolt substation with a new substation serving power to the east side of Yokota Air Base. Electrical work included replacement of three oil-filled transformers with three 5000 kVA SF6 transformers, underground transmission and primary distribution cables, SF6 and vacuum circuit breakers, coordination with Tokyo Electric Power Company, and fiber optic cable from the new substation to new remote monitoring equipment at the Base’s Control Building. The project also included a new single story substation building complete with lighting, power, SCADA, and a lightning protection system.