LW36-126(145) outdoor self-energy type circuit breaker is six sulfur hexafluoride gas as insulation and arc extinguishing medium , CT30 spring operation mechanism and the principle self-blown arc extinguishing of single variable pressure distance. The product is suitable for 72.5kV (126kV) three-phase AC 50HZ power system, which is used for points and load current , overload current and short circuit current.