Iyo yakaumbwa kesi redunhu breaker (MCCB) rudzi rwemidziyo yekudzivirira yemagetsi inoshandiswa kuchengetedza dunhu remagetsi kubva kune akawandisa azvino, izvo zvinogona kukonzera kuwandisa kana pfupi dunhu Iine ratidziro yazvino inosvika kusvika 1600A, MCCBs inogona kushandiswa kwakawanda akasiyana ma voltages uye ma frequency ane anochinja marongero erwendo. Aya mabhureki anoshandiswa pachinzvimbo chediki diki mabhureki (MCBs) muhombe PV masisitimu ehurongwa hwekuzviparadzanisa uye kuchengetedza zvinangwa.
Mashandiro anoita MCCB
Iyo MCCB inoshandisa tembiricha sensitiv'e mudziyo (iyo yekupisa chinhu) ine yazvino inovhenekera magetsi remagetsi (iro remagetsi simba) kupa nzira yekufamba yekudzivirira uye kuzviparadzanisa zvinangwa. Izvi zvinogonesa iyo MCCB kupa:
• Kuwedzeredza Kuchengetedzwa,
• Magetsi Kanganiso Kudzivirirwa kubva pfupi dunhu mafungu
• Magetsi Chinja chekubvisa.
Kuwedzeredza Kudzivirirwa
Kuchengetedzwa kwepamusoro kunopihwa neMCCB kuburikidza nechinhu chekupisa chinonzwika. Ichi chinhu chinonyanya kusangana nebimetallic: kontakiti ine simbi mbiri dzinowanda pamitengo yakasiyana kana dzasvitswa kune yakanyanya tembiricha. Pakati peyakajairika mashandiro ezvinhu, bimetallic contact inobvumidza magetsi kuyerera kuburikidza neMCCB. Kana iyo yazvino ikapfuura kukosha kwerwendo, iyo bimetallic kuonana ichatanga kupisa uye kukotama nekuda kweakasiyana ehuremu hwekupisa mukati mehukama. Pakupedzisira, kusangana kwacho kunokombama kusvika padanho rekusundira bhawa rerwendo uye kuburitsa mafoni, zvichikonzera kuti dunhu rikanganiswe.
Kudzivirirwa kwetembiricha yeMCCB kunowanzo kuve nekunonoka kwenguva kubvumidza nguva pfupi yekuwedzeredza iyo inowanzoonekwa mune mamwe mashandiro edhizaini, senge inrush currents dzinoonekwa kana uchitanga mota. Iyi kunonoka kwenguva inobvumira dunhu kuti rirambe richishanda mumamiriro ezvinhu aya pasina kukanganisa MCCB.
Electrical Mhaka Kudzivirirwa kubva pfupi redunhu mafungu
MCCBs inopa mhinduro yekukasira kune pfupi redunhu mhosva, zvinoenderana nesimba remagetsi emagetsi. Iyo MCCB ine solenoid coil iyo inogadzira diki remagetsi magetsi kana iyezvino ichipfuura neMCCB. Munguva yekushanda kwese, iyo electromagnetic munda inogadzirwa neiyo solenoid coil haina basa. Nekudaro, kana pfupi redunhu mhosva ikaitika mudunhu, hombe yazvino inotanga kuyerera kuburikidza nesolenoid uye, semhedzisiro, munda wakasimba wemagetsi unosimbiswa unokwezva rwendo bar uye unovhura iwo maonana.
Magetsi Chinja chekubvisa
Pamusoro pekukanganisa nzira, maMCCB anokwanisa zvakare kushandiswa seanobvisa mabhaisikopo echimbichimbi kana paitika mabasa ekukurumidzira kana ekugadzirisa. Iyo arc inogona kugadzirwa kana iyo yekuvhura ichivhura. Kuti varwisane neizvi, MCCBs dzine zvemukati arc nzira dzekupedza kudzima arc.
Kududzira MCCB Hunhu uye Kuyera
Vagadziri veMCCB vanofanirwa kupa mashandiro eMCCB. Mimwe yemipimo yakajairika inotsanangurwa pazasi:
Yakatemerwa Furemu Razvino (Inm):
Iyo yepamusoro yezvino iyo MCCB yakatarwa kubata. Iyi yakatarwa furemu yazvino inotsanangura muganho wepamusoro werunogadziriswa rwendo rwazvino renji. Iyi kukosha inogadza iyo breaker furemu saizi.
Rated Ikozvino (In):
Iyo yakatarwa kukosha kwazvino inosarudza kana iyo MCCB inofamba nekuda kwekuremerwa kudzivirirwa. Iyi kukosha inogona kugadziriswa, kusvika pakakwirira yeiyo yakatarwa furemu yazvino.
Yakatemwa Insulation Voltage (Ui):
Kukosha uku kunoratidza huwandu hwemagetsi hunogona kudzivirirwa neMCCB mumamiriro ekurapa. Iyo yakatarwa voltage yeMCCB inowanzo kudzika kupfuura iyi kukosha kupa mugove wekuchengetedza.
Yakarongwa Kushanda Voltage (Ue):
Iyi kukosha ndiyo yakatarwa magetsi ekuenderera mberi kwekushanda kweMCCB. Iyo inowanzo fanika senge kana padhuze neiyo system voltage.
Yakatemwa Impulse Kutsungirira Voltage (Uimp):
Kukosha uku ndiko kunodarika kwepamusoro kwemagetsi wedunhu mudariki anogona kumira kubva pakuchinja masaji kana mheni. Ukoshi uhwu hunogonesa kugona kweMCCB kutsungirira kwenguva pfupi pamusoro-voltages. Saizi yakajairwa yekuyedza kushushikana ndeye 1.2 / 50µs.
Inoshanda Pfupi Circuit Kuputsa Kugona (Ics):
Iyi ndiyo yekupedzisira mhosva iripo iyo MCCB inogona kubata isina kukuvara zvachose. MCCBs zvinowanzo shandiswazve mushure mekukanganisa kwekukanganisa mashandiro chero vasingadariki kukosha uku. Iyo yakakwira iyo Ics, inonyanya kuvimbika mudunhu mudariki.
Yekupedzisira Pfupi Dunhu Kuputsa Kugona (Icu):
Uku ndiko kukanganisa kwepamusoro-soro kwazvino kukosheswa neMCCB, kana iko iko iko iko iko iko iko iko iko kudarika uku kukosha, iyo MCCB inozotadza kukwikwidza. Muchiitiko ichi, imwe nzira yekudzivirira ine yakakwira kutyora chinzvimbo chinofanira kushanda. Izvi zvinoratidza kuvimbika kwekushanda kweMCCB. Zvakakosha kucherechedza kuti kana iko iko iko iko iko iko kudarika Ics asi isingapfuure Icu, iyo MCCB inogona kubvisa mhosva, asi inogona kukuvara uye inoda kutsiviwa.
Mechanical Hupenyu: Iyi ndiyo nhamba yekuwanda yenguva iyo MCCB inogona kushandiswa manyore isati yakundikana.
Hupenyu Hwemagetsi: Iyi ndiyo nhamba yekuwanda yenguva iyo MCCB inogona kugumbuka isati yatadza.
Kuyera iyo MCCB
MCCBs mune yemagetsi wedunhu inofanirwa kuve saizi zvinoenderana nedunhu rinotarisirwa mashandiro azvino uye zvinogona kukanganisa mafungu. Idzi nzira nhatu huru pakusarudza MCCBs ndeiyi:
• Iyo yakatarwa inoshanda voltage (Ue) yeMCCB inofanirwa kunge yakafanana neiyo system voltage.
• Iko kukosha kwerwendo rweMCCB kunofanirwa kuchinjiswa zvinoenderana neyazvino inodhonzwa nemutoro.
• Iko kutyora kweMCCB kunofanirwa kuve kwakakwirira kupfuura fungidziro dzinogona kunge dziripo.
Mhando dzeMCCB
Mufananidzo 1: Rwendo rwekufamba kwerudzi B, C, uye D MCCBs
MCCB Kugadziriswa
MCCBs inoiswa pasi pemvura yakakwira; saka kugadziriswa kweMCCBs kwakakosha pakuvimbika kushanda. Dzimwe dzenzira dzekuchengetedza dzinokurukurwa pazasi:
1. Kuongorora kwekuona
Munguva yekutarisisa kunoonekwa kweMCCB, zvakakosha kuti utarise kune vakaremara vekutaurirana kana kutsemuka mune casing kana kuputira. Chero anotsva mamaki pane ekubatana kana casing anofanirwa kurapwa nehungwaru.
2. Mafuta
Mamwe maMCCB anoda lubrication yakakwana kuti ave nechokwadi chekushanda kweyebhuku rekubvisa switch uye zvemukati zvinofamba zvikamu.
3. Kuchenesa
Iyo tsvina inoiswa paMCCBs inogona kushatisa iyo MCCB zvikamu. Kana iyo tsvina ichisanganisira chero kuitisa zvinhu inogona kugadzira nzira yezvazvino uye kukonzera kukanganisa kwemukati.
4. Kuedzwa
Pane miedzo mitatu mikuru inoitwa sechikamu chekugadzirisa maitiro eMCCB.
Insulation Kuramba Bvunzo:
Bvunzo dzeMCCB dzinofanirwa kuitiswa nekubvisa iyo MCCB uye kuyedza kuputira pakati pezvikamu uye nepakati pekupa nekutakura zviteshi. Kana kuyerwa kwekudzivirira kwekudzivirira kwakadzikira pane izvo zvinokurudzirwa nemushambadzi zvekudzivirira kusagadzikana saka iyo MCCB haizokwanisa kupa dziviriro yakakwana.
Bata Kuramba
Bvunzo iyi inoitwa nekuyedza kuramba kwevanosangana nemagetsi. Iyo yakayerwa kukosha inofananidzwa neiyo kukosha kwakataurwa nemugadziri. Pasi pemamiriro ekujairika ekushanda, kusangana kwekushomeka kwakadzika kwazvo nekuti MCCBs dzinofanirwa kubvumidza kushanda kwazvino kuburikidza nekurasikirwa kushoma.
Kutambisa Bvunzo
Bvunzo iyi inoitwa nekuyedza mhinduro yeMCCB pasi pemamiriro ezvinhu akaenzana uye akakanganisa mamiriro. Kuchengetedzwa kwemafuta kweMCCB kunoedzwa nekumhanyisa ruzha rukuru kuburikidza neMCCB (300% yeiyo yakatarwa kukosha). Kana iyo kutyora ikatadza kugumbuka, chiratidzo chekutadza kwekudzivirirwa kwemafuta. Chiyero chekudzivirira kwemagineti chinoitwa nekumhanyisa mapfupi epamusoro epamusoro soro pari zvino. Pasi pemamiriro ezvinhu akajairika, magineti dziviriro iri ipapo. Bvunzo iyi inofanirwa kuitiswa kumagumo sezvo mafungu akakwirira achiwedzera tembiricha yekutaurirana uye kuputira, uye izvi zvinogona kuchinja mhedzisiro yemimwe bvunzo mbiri.
Mhedziso
Sarudzo chaiyo yeMCCBs yekushandisa inodiwa yakakosha pakupa dziviriro yakakwana munzvimbo dzine magetsi emagetsi akakwirira. Izvo zvakakoshawo kuita zviito zvekuchengetedza nguva nenguva uye imwe neimwe nguva mushure mekufamba kwenzira nzira dzekugadzirisa kuchengetedza nzvimbo.
Post nguva: Nov-25-2020