Specifications include, but are not limited to: QUANTITY OF TWELVE (12) - Three-phase, 60 Hertz, 15 kV Outdoor Vacuum/SF6 Circuit Breaker for use on a 12,470/7,200-volt distribution system; The circuit breaker(s) shall be furnished for operation in the following physical conditions: 2.1 Altitude: 500 to 2000 feet above mean sea level. 2.2 Ambient temperature: -30 degrees F to 110 degrees F. 2.3 Wind load: 80 mph. 2.4 Seismic zone: 2 as defined by UBC. The circuit breaker shall have the following design features: 4.1 Three pole, 1200A, Vacuum/SF6 interrupters with pneumatic, spring, or magnetic operating mechanism. 4.2 Six (6) Sky gray (ANSI-#70) bushings. Solid bushings can be constructed of Porcelain, Epoxy, or Cycloaliphatic material. Bushings shall have Anderson Electric Company Type D2S terminals for two (2) 500 MCM stranded copper conductors per terminal. Proposal shall specify bushing type and manufacturer. 4.3 Welded steel supporting frame with adjustable legs, if required, so that energized metal parts will be a minimum of 9' 10" above foundation. 4.4 Mechanical position indicator, visible from outside the mechanism housing. 4.5 Tank Lifter, if required.