Iyo yedunhu breaker: inogona kubatika, kutakura uye kutyora yazvino pasi peyakajairika mamiriro edunhu, inogona zvakare kuchinjika pasi peyakatsanangurwa isiri-yakajairika mamiriro edunhu, kutakura imwe nguva uye kutyora ikozvino yemuchina switch.
Micro Circuit Breaker, inonzi MCB (Micro Circuit Breaker), ndiyo inonyanya kushandiswa kuchengetedza midziyo yemagetsi mukuvaka magetsi emagetsi ekuparadzira michina.Inoshandiswa kune imwe-chikamu uye nhatu-chikamu chipfupi chedunhu, kuwandisa uye overvoltage kudzivirira pazasi 125A, kusanganisira ina mana emhando imwe-pole 1P, maviri-pole 2P, matatu-pole 3P uye ina-pole 4P.
Iyo micro circuit breaker inosanganisira nzira yekushanda, yekubata, chigadziro chekudzivirira (yakasiyana-siyana yekusunungura michina), arc yekudzima hurongwa, etc. Kubatana kukuru kunoshandiswa nemaoko kana kuvharwa nemagetsi.Mushure mekunge iyo huru yekubata yavharwa, iyo yemahara yekufamba michina inovhara iyo huru yekusangana munzvimbo yekuvhara.Iyo coil yekusunungurwa kwepamusoro uye chinhu chekushisa chekusunungurwa kwekushisa chakabatanidzwa kune guru redunhu mumutsara, uye coil ye undervoltage release yakabatanidzwa kune magetsi akafanana.Kana dunhu rikaitika kupfupi dunhu kana kuremerwa kwakakomba, iyo armature ye overcurrent rwendo mudziyo inodhirowa, ichiita yemahara rwendo mashini kushanda, uye iyo huru yekubata inobvisa dunhu guru.Kana dunhu raremerwa, chinhu chinopisa chemudziyo wekudziya wekufamba chinopisa kukotamisa bimetal sheet uye kusunda nzira yemahara yekufamba kuita.Kana dunhu riri pasi pemagetsi, iyo armature ye undervoltage release inosunungurwa.Zvakare inobvumira iyo yemahara rwendo michina kuti ishande.
Iyo yakasara yazvino yedunhu-breaker: Shanduko inoshanda otomatiki kana yasara ikozvino mudunhu inodarika kukosha kwekutanga.Inowanzo shandiswa leakage circuit breakers yakakamurwa kuita mapoka maviri: voltage rudzi uye yazvino mhando, uye yazvino mhando yakakamurwa kuita electromagnetic mhando uye yemagetsi mhando.Leakage circuit breaker anoshandiswa kudzivirira kuvhunduka kwemunhu, uye anofanirwa kusarudzwa zvinoenderana nezvinodiwa zvakasiyana zvekusangana kwakananga uye kuchengetedzwa kwakanangana.
Sarudza maererano nechinangwa chekushandisa uye nzvimbo iyo midziyo yemagetsi iripo
1) Kudzivirirwa kubva pakusangana kwakananga nekuvhunduka kwemagetsi
Nekuti kukuvadzwa kwekusangana kwemagetsi kuvhunduka kwakakura, zvinokonzeresa zvakakomba, saka kusarudza kuvuza kwedunhu nekunzwa kwakanyanya, kwemidziyo yemagetsi, nharembozha midziyo yemagetsi uye mitsara yenguva pfupi, inofanirwa kuiswa muloop inoshanda ikozvino ye30mA, nguva yekushanda mukati me 0.1s leakage circuit breaker.Kune dzimba dzekugara dzine mimwe midziyo yemumba, zviri nani kuiisa mushure mekupinda mudzimba simba mita.
Kana kamwe magetsi emagetsi ari nyore kukonzeresa kukuvadzwa kwechipiri (sekushanda pakakwirira), chinoputika chedunhu chine 15mA inoshanda uye nguva yekushanda mukati meUS inofanira kuiswa muchiuno.Pamidziyo yemagetsi yekurapa muzvipatara, madhiri emagetsi ekudonha ane 6mA inoshanda uye nguva yekushanda mukati meUS inofanirwa kuiswa.
2) Dziviriro isina kunanga yekubata
Indirect kuonana nemagetsi kuvhunduka munzvimbo dzakasiyana kunogona kukonzera madhigirii akasiyana ekukuvadza kumunhu, saka akasiyana leakage circuit breakers anofanirwa kuiswa munzvimbo dzakasiyana.Izvo zvinodikanwa kushandisa leakage circuit breakers ine yakakwira senitivity kunzvimbo uko kuvhunduka kwemagetsi kunonyanya kukuvadza.Munzvimbo dzakanyorova kupfuura munzvimbo dzakaoma njodzi yekuvhunduka kwemagetsi yakakura, kazhinji inofanirwa kuiswa inoshanda ikozvino ye15-30mA, nguva yekushanda mukati me 0.1s leakage circuit breaker.Pamidziyo yemagetsi mumvura, chiito chinofanira kuiswa.Leakage circuit breaker ine ikozvino ye6-l0mA uye nguva yekushanda mukati meUS.Pamidziyo yemagetsi apo mushandisi anofanira kumira pachinhu chesimbi kana mugaba resimbi, chero bedzi voltage iri pamusoro pe 24V, chinovharisa chedunhu chine chinobuda chiri pasi pe15mA uye nguva yekushanda mukati meUS inofanira kuiswa.Kune yakagadziriswa midziyo yemagetsi ine voltage ye220V kana 380V, kana kushorwa kwepasi kweimba kuri pazasi 500fZ, muchina mumwechete unogona kuisa yekuvuza yedunhu breaker ine inoshanda ikozvino ye30mA uye nguva yekushanda ye0.19.Pamidziyo mikuru yemagetsi ine yazvino yakayerwa inopfuura 100A kana dunhu rekupa magetsi ine akawanda emagetsi emagetsi, inodonha yedunhu inotyora ine inoshanda ikozvino ye50-100mA inogona kuiswa.Kana iyo yekumisa kumisa kwemidziyo yemagetsi iri pazasi pe1000, inovuza yedunhu breaker ine inoshanda ikozvino ye200-500mA inogona kuiswa.
Nguva yekutumira: Sep-19-2023