LW58-12KV outdoor pole-mounted SF6 circuit breaker is a product developed by our company in response to the new requirements of the State Grid's 10kV primary and secondary integrated pole-mounted circuit breaker access to the grid. The switch configuration fully meets the State Grid's primary and secondary integrated requirements, which is convenient for the State Grid's unified procurement and batch production. The switch has a compact structure, reasonable layout, and complete functions. All indicators meet the State Grid's primary and secondary integration requirements; it uses protection CT, zero-sequence CT and zero-sequence voltage sensor with unified parameters, which has the characteristics of wide measurement range, high measurement accuracy and high reliability. The complete analog quantity facilitates accurate judgment of various line faults.