HR17B rangatū momo fusemomotuhonome te mahi kawenga, e tika ana mo te 40A ~ 1600A o naianei, he 1 roopu, 2 roopu, 3 roopu, 4 roopu tohu. Ka taea te whakauru ki runga i te busbar, ka taea hoki te whakauru ki te pereti kua whakaritea; ka whakaratohia e ia te whakaurunga o runga me te raro me te hanganga whakaputa, me te whakauru maripi-mata me te taputapu arc-mana; me te uhi o te whakahuri he kohao katia katia, he pana tohu hanga-i roto, he pana whakakitenga. ka taea te aroturuki fuse whiriwhiri, ka taea hoki te whakamahi hei pana maripi. Ko te whakawhiti me te ahua ataahua, te pukapuka me te waahanga, ka tutuki i nga paerewa IEC60947-3, GB14048.3.