Nheyo yekushanda yeCircuit Breaker

muputsi wedunhuinowanzova sisitimu yekubata, sisitimu yekudzima arc, nzira yekushanda, trip unit, uye casing.
Basa remuchina wekupwanya dunhu nderekucheka nekubatanidza circuit yekutakura, uye kutema circuit isina kunaka, kuitira kudzivirira kukura kwetsaona uye kuona kuti inoshanda zvakachengeteka. Muchina wekupwanya dunhu une voltage yakawanda unofanirwa kupwanya 1500V, uye magetsi ari 1500-2000A arc, uye ma arc aya anogona kutambanudza kusvika 2m uye achiramba achitsva asingadzime. Saka, kudzima dunhu idambudziko rinofanira kugadziriswa kune vanopwanya dunhu vane voltage yakawanda.
Maputsi edunhu ane simba shoma, inozivikanwawo sekuti otomatikimaswichi emhepo, inogona kushandiswa kubatidza nekudzima macircuit ekutakura, uye inogonawo kushandiswa kudzora mota dzinotanga kashoma. Basa rayo rakaenzana nehuwandu hwemamwe kana ese emabasa ekubikisa banga, over-current relay, voltage loss relay, thermal relay uye leakage protector. Ichi chishandiso chakakosha chekudzivirira mu network yekugovera ine voltage shoma.
Ma "low-voltage circuit breakers" ane mabasa akawanda ekudzivirira (overload,dunhu pfupi, dziviriro isina simba, nezvimwewo), kukosha kwekushanda kunogadziriswa, kugona kukuru kwekutyoka, kushanda kuri nyore, kuchengetedzeka, nezvimwewo, saka zvinoshandiswa zvakanyanya. Maumbirwo nepfungwa yekushanda. Low-voltage circuit breaker inoumbwa nekushandisa, kubatana, zvishandiso zvekudzivirira (zvakasiyana-siyana zvinoburitswa), arc extinguishing system nezvimwewo.
Kubata kukuru kwe low-voltage circuit breaker kunovharwa nemaoko kana nemagetsi. Mushure mekunge kubata kukuru kwavharwa, free tripping mechanism inovhara kubata kukuru munzvimbo yakavharwa. Coil yekuburitsa overcurrent uye chinhu chekupisa chekuburitsa kupisa zvakabatana zvakatevedzana nedunhu guru,uye coil yekusunungurwa kwe undervoltage yakabatana pamwe chete nemagetsi. Kana dunhu rapfupika kana kuti rakawandisa zvakanyanya, armature yekusunungurwa kwe over-current ichadhonza kuti free tripping mechanism ishande, uye main contact ichabvisa main circuit. Kana dunhu rakawandisa, the thermal element yekusunungurwa kwe thermal ichagadzira kupisa kuti ikotamise bimetal sheet, ichisundidzira free release mechanism kuti ishande. Kana dunhu rakaderera, armature yekusunungurwa kwe undervoltage inoburitswa. Inoitawo kuti free tripping mechanism ishande. Shunt release inoshandiswa kure. Munguva yekushanda kwakajairika, coil yayo inodzimwa. Kana distance control ichidiwa, tinya bhatani rekutanga kuti upe simba coil.