The FZW28 outdoor high-voltage AC vacuum vacuum switch. This product uses vacuum arc extinguishing, SF₆ gas insulation, and isolation knife device, which has manual and automatic operating functions. Load switch and control terminal FTU, power transformer supporting installation, can realize the automatic isolation of the fault section of the 12kV power distribution line and the rapid power recovery of the normal section to achieve the automation of the distribution network. The product is suitable for outdoor three-phase AC power distribution systems with a rated voltage of 12kV and a rated frequency of 50Hz. As a use of openings, co-load currents, and short-circuit currents, it has been widely used in substation, industrial and mining enterprises, urban and agricultural network automation matching. Electric networks and frequent operations.