... and standardized operating mechanism, Stable and reliable ,Convenient for maintenanceFully insulated pole with high protection level and ability of anti-corrosionTulip ... ,2500,3150,5Rated short-circuit breaking currentkA20,25,31.5,40,5020,25,31.56Rated short time withstand currentkA20,25,31 ... .5,40,5020,25,31.57Rated peak withstand current50,63,80,100 ...