... Isolating Switch Fuse1. Description:DNH1(HR17) series NH fuse switch disconnector used for rated current 40A-630A, can be bus type or ... closing, arc extinguishing equipment and touch protection parts, with fuse matched inside. and self-closing test hole in the switch ... and 630ANumber of poles: 3P,Assorted fuse links: NT00 for 160A, NT1 for 250A, NT2 for 400A and NT3 for 630ARated currents: 4, 6, 10 ...