Specifications include, but are not limited to: Circuit breakers shall be 3 pole, single-throw, gang operated, single pressure puffer type using SF6 gas as the insulation and arc quenching medium. The circuit breaker design shall be dead-tank type with current transformers mounted on each side of the interrupters. Circuit breaker shall be capable of withstanding without damage or internal flashover 1.5 times nominal line-to-ground system voltage under one atmosphere of SF6 gas pressure. Under this condition, the circuit breaker is not required to open or close. Circuit breakers shall be capable of 180 degree out-of-phase switching. Circuit breakers shall be designed and constructed for the wind, ice, seismic withstand, and terminal loading conditions specified on the Circuit Breaker Specification and Data Sheets. All lamps, either for general illumination or for indication, shall be LED.
