... ,1minbetween the homopolar terminal1000V,AC50HZ,1minbetween different terminal 2000V,AC50HZ,1minEndure Dibratility 50HZ,1.2mmEndure Impact≥10gLifeauto-return button1000000auto-return button,selector ... button500000emergency stop button , key button 100000Installation hole size Type ABCircle≥18mm≥18mmSquare≥18mm ...