Makadhi eDunhu Akaumbwa Akavhurika
A muchina wekupwanya dunhu wekesi wakaumbwa (MCCB)imhando yecircuit breaker inoshandiswa zvakanyanya kudzivirira magetsi munzvimbo dzemaindasitiri nedzemabhizinesi nekuda kwekugona kwayo kupa dziviriro yakavimbika uye yakachengeteka kubva pamagetsi akawandisa, mapfupi uye mamwe matambudziko emagetsi. Muchinyorwa chino, tichaongorora zvakadzamaMCCBsuye kurukurai hunhu hwadzo, misimboti yekushanda, mavakirwo adzo, uye mashandisirwo adzo.
Hunhu hweMCCBs
MaMCCB akagadzirwa nemabasa akati wandei anobatsira kuchengetedza masisitimu emagetsi nenzira yakachengeteka uye yakavimbika. Zvimwe zvinhu zvakakosha zveMCCB zvinosanganisira:
- Kukwanisa kukuru kwekuputsa:Makaputsi edunhu akaumbwaanokwanisa kupwanya mafungu emvura anosvika zviuru zveampere, zvichiita kuti ave akakodzera kushandiswa nesimba guru.
- Nzira yekufamba nemhepo ine simba remagineti:Makaputsi edunhu akaumbwashandisa nzira yekufamba nemhepo ine magneti kuti uone uye upindure kumhepo ine voltaic yakawanda uye mapfupi. Zvinhu zvekufamba nemhepo zvine voltaic zvinopindura kune zvakawanda, nepo zvinhu zvekufamba nemagnetic zvichipindura kune mapfupi.
- Kugadziriswa Kwerwendo: MCCBs dzine kugadziridzwa kwerwendo, izvo zvinoita kuti dzikwanise kuiswa padanho rakakodzera rekushandisa kwaunoda.
- Saizi dzakasiyana-siyana dzemafuremu: MaMCCB anowanikwa muhukuru hwakasiyana-siyana hwemafuremu, izvo zvinoita kuti ashandiswe mumhando dzakasiyana-siyana dzemashandisirwo. Nheyo yekushanda yemuchina wekupwanya dunhu wekesi wakaumbwa Nheyo yekushanda yeMCCB yakavakirwa pakushandisa thermal-magnetic tripping mechanism. Chinhu chekufamba nemhepo chinodziya chinonzwa kupisa kunogadzirwa nekuyerera kwemagetsi mudunhu uye chinopwanya muchina wekupwanya dunhu kana magetsi adarika chiyero cherwendo. Chinhu chekufamba nemhepo chinodziya chinonzwa simba remagineti rinogadzirwa nepfupi mudunhu, zvichipwanya muchina wekupwanya dunhu nekukurumidza. Maumbirwo emuchina wekupwanya dunhu wekesi wakaumbwa
- MCCB ine imba yepurasitiki yakagadzirwa nesimbi ine michina yekufamba, zvinhu zvinobatana uye zvikamu zvemagetsi zvinotakura zvinhu.
- Macontact acho akagadzirwa nezvinhu zvinofambisa mhepo zvakanyanya zvakaita semhangura, nepo nzira yekufamba nayo iine bimetallic strip uye magnetic coil.
Kushandiswa kweMCCB
MCCB dzinowanzoshandiswa mumhando dzakasiyana siyana dzakadai se:
- Sisitimu yekugovera simba
- Nzvimbo Yekudzora Mota
- Michina yeindasitiri
- Matransformer
- Seti yejenareta
mukupedzisa
Ma "molded case circuit breakers" akavimbika uye anoshanda zvakanaka pakudzivirira magetsi. Magadzirirwo awo uye hunhu hwawo zvinoita kuti akwanise kushandiswa mumhando dzakasiyana-siyana dzakadai sema "transformers", masisitimu ekuparadzira magetsi, uye nzvimbo dzekudzora mota. Maitiro awo e "thermal-magnetic trip mechanism", kugona kwawo kuputsa magetsi zvakanyanya uye ma "trip settings" anogadziriswa anoita kuti ave sarudzo yakakurumbira yekudzivirira magetsi munzvimbo dzekutengeserana nemaindasitiri.
Nguva yekutumira: Kurume-10-2023