1,widely used in 500V power system,rural power transformer low voltage side outlet and so on 2, ... switch (hereinafter referred to as isolating switch), widely used in rural power transformer low voltage side outlet, branch feeders, are affixed ... -0.5 0.5200 1250 3150 4 5 2 34005006008001000 500V GWR-0.5, Low Voltage Isolate Switch/Porcelain or Zinc ...