LW3-12 outdoor pole-mounted SF6 circuit breaker is a new-generation product developed by our company in response to the new requirements for the integration of primary and secondary circuits of the State Grid for one-time and two-time integrated pole-mounted switches. The switch configuration fully complies with the requirements of the State Grid's one-time and two-time integrated one-time and two-time integrated packaging, facilitating unified purchase by the State Grid and batch production. The switch has a compact structure, reasonable layout, complete functions, and all indicators meet the requirements of the State Grid's one-time and two-time integrated. It adopts protection CTs, zero-sequence CTs and zero-sequence voltage sensors with unified parameters, featuring a wide measurement range, high measurement accuracy, and high reliability. The analog quantities are complete, facilitating accurate determination of various faults in the line.