MCB (diki redunhu mudariki)
Hunhu
Yakatemerwa zvazvino kwete anopfuura 125 A.
• Maitiro erwendo kazhinji haachinjike.
• Thermal kana kupisa-magineti mashandiro.
MCCB (yakaumbwa kesi redunhu mudariki)
Hunhu
Rated parizvino kusvika 1600 A.
• Rwendo rwazvino runogona kuchinjika.
• Thermal kana kupisa-magineti mashandiro.
Dunhu redunhu mudariki
Hunhu
Rated parizvino kusvika zviuru gumi A.
• Mafambiro ehurwendo anowanzo gadziridzwa zvizere kusanganisira anofungidzirwa ekufamba rwendo uye kunonoka.
• Kazhinji zvinodzorwa nemagetsi-mamwe mamodheru microprocessor inodzorwa.
• Inowanzo shandiswa kugovana simba hombe mune hombe maindasitiri chirimwa, uko mabhureki akarongwa mumadhizaini ekudhirowa kuitira nyore kugadzirisa.
Vacuum redunhu mudariki
Hunhu
Neyakavhenekwa parizvino kusvika 3000 A,
• Aya mabhureki anovhiringidza arc mubhodhoro remuchina.
• Izvi zvinogona kuiswa pane anosvika zviuru makumi matatu nemashanu V. Mafuro edunhu ekutsuka anowanzove netarisiro yehupenyu hwakareba pakati pekugadzirisa kupfuura zvinoita mhepo dzinotenderera mhepo.
RCD (yakasara yazvino mudziyo / RCCB (residualcurrent redunhu mudariki)
Hunhu
• Chikamu (mutsetse) neNeutral waya ese akabatana kuburikidza neRCD.
• Inodonha iyo dunhu kana paine iko kukanganisa kwenyika parizvino.
• Huwandu hwazvino kuyerera kuburikidza nechikamu (mutsetse) hunofanira kudzoka kuburikidza nekusarerekera.
• Inoona neRCD. chero kusanzwisisika pakati pemvura mbiri dzinoyerera kuburikidza nechikamu uye kwazvakarerekera kuona ne -RCD uye kukomberedza dunhu mukati me30Miliseconed.
• Kana imba iine system yepasi yakabatana netambo yepasi uye kwete iyo huru inopinda tambo, saka inofanira kunge iine macircuits ese akachengetedzwa neRCD (nekuti iwe mite haukwanise kuwana yakakwana mhosva yazvino yekukanganisa MCB)
• RCDs inzira inoshanda zvakanyanya yekudzivirira kwekuvhunduka
Iyo inonyanya kushandiswa ndeye 30 mA (milliamp) uye zana maMaoni. Kuyerera kwazvino kwe30 mA (kana 0.03 amps) yakaringana diki zvekuti zvinoita kuti zvive zvakaoma kwazvo kuwana kushamisika kune njodzi. Kunyangwe zana mA chiumbwa chidiki kana ichienzaniswa neyazvino inogona kuyerera mupasi kukanganisa isina kudzivirirwa kwakadaro (mazana emaap)
Iyo 300/500 mA RCCB inogona kushandiswa panongoda chete kudzivirira moto. semuenzaniso., pamagetsi emagetsi, uko njodzi yekuvhunduka kwemagetsi iri diki.
Kuganhurirwa kweRCCB
• Standard electromechanical RCCBs yakagadzirirwa kushanda pane zvakajairika mafomu ekushambadzira uye haigone kuvimbiswa kuti ishande pasina kana akajairwa mafomati mafomu anogadzirwa nemitoro. Iyo yakanyanya kujairika ndeye hafu wave yakagadziriswa waveform fomu dzimwe nguva inonzi pulsating dc inogadzirwa nemamhanyisa ekudzora michina, semi semi ma conductor, makomputa uye kunyange madhimoni.
• Zvakasarudzika RCCBs zviripo zvinoshanda pane zvakajairwa ac uye pulsating dc.
MaRCD haape dziviriro kubva pakuwandisa kwazvino: maRCD anoona kusaenzana mune ariko uye asina kwazvakarerekera mafungu. Kuwedzeredza kwazvino, kunyangwe hombe, hakugone kuwanikwa. Icho chinowanzo kukonzeresa matambudziko nema novice kutsiva MCB mune fuse bhokisi ine RCD. Izvi zvinogona kuitwa mukuyedza kuwedzera kudzivirirwa kwekuvhunduka. Kana mhenyu-isina kwayakarerekera mhosva ikaitika (dunhu diki, kana kuwandisa), iyo RCD haifambe, uye inogona kukuvara. Mukuita, iyo MCB huru yezvivakwa ingangogumburwa, kana fiyuzi yebasa, saka mamiriro acho haatomboita kuti apinde munjodzi; asi zvingasava nyore.
• Izvozvi zvave kugona kuwana MCB uye uye RCD muchikamu chimwe chete, chinonzi RCBO (ona pazasi). Kutsiva MCB neRCBO yeiyo yakafanana chiyero kunowanzo chengeteka.
Kunetseka kwekugumburwa kweRCCB: Kuchinja kamwe kamwe mumagetsi kunogona kukonzera kuderera, kupfupika kwazvino kuyerera pasi, kunyanya mumidziyo yekare. RCDs dzinotarisisa uye dzinoshanda nekukurumidza zvakanyanya; vangangogumburwa kana mota yefriji yekare yadzima. Mimwe michina inozivikanwa kuti 'inodonha', ndiko kuti, inogadzira diki, inogara ichiyerera iripo iye zvino kupasi. Dzimwe mhando dzemidziyo yemakomputa, uye makuru terevhizheni, zvinonzi zvinowanzo kwidzwa kukonzera matambudziko.
• RCD haizodziviriri pachikwata chine soketi netambo dzayo chaidzo uye dzisina kwadzakarerekera nenzira isiri iyo.
• RCD haizodzivirirwe pakupisa kunoguma kana ma conductor asina kukamurwa zvakanaka kumatemu avo.
• RCD haizodziviriri pakurwisa-kwekusarerekera kuvhunduka, nekuti izvozvi zviri kurarama uye zvisina kwazvakarerekera zvakaenzana. Saka kana iwe uchibata vapenyu uye vasina kwavakarerekera ma conductor panguva imwe chete (semuenzaniso, ese ma terminals eakagadzika magetsi), unogona achiri kuwana kushamisika kushamisika.
ELCB (Pasi Rekugera Circuit Remake)
Hunhu
• Phase (mutsetse), Neutral uye Earth waya yakabatana kuburikidza neECBB.
• ELCB iri kushanda zvichibva paPasi rekudonha pari zvino.
Inoshanda Nguva yeECBB:
Muganhu wakachengetedzeka weNguva ino unogona kudzivirirwa neMuviri weMunhu ndeye 30ma sec.
• Ngatiti Kurwisa Kwemunhu Kwemunhu kuri 500Ω uye Voltage pasi ndeye 230 Volt.
• Muviri wazvino uno unenge uri 500/230 = 460mA.
• Nekudaro ELCB inofanirwa kushanda mu30maSec / 460mA = 0.65msec.
RCBO (Residual Circuit Breaker ine OverLoad)
Musiyano uripo pakati peESBB neRCCB
• ELCB ndiro zita rekare uye rinowanzoreva zvishandiso zvinoshandiswa nemagetsi izvo zvisingawanikwe uye zvinokurudzirwa kuti utsive kana wawana imwe.
• RCCB kana RCD ndiro zita idzva rinotsanangura zvinoitwa (saka zita idzva kusiyanisa nemagetsi anoshandiswa).
RCCB nyowani yakanakisa nekuti ichaona chero iko kukanganisa kwepasi. Rudzi rwemagetsi runoona chete zvikanganiso zvepasi zvinoyerera zvichidzika kuburikidza nepasi huru waya saka ndosaka zvikarega kushandiswa.
• Iyo nzira iri nyore yekuudza wekare magetsi akashandiswa rwendo ndeye kutsvaga huru yepasi waya waya yakabatana kuburikidza nayo.
• RCCB inongova nemutsara uye kwazvakarerekera kubatana.
• ELCB iri kushanda zvichibva paPasi rekudonha pari zvino. Asi RCCB haisi kuona kana kubatana kwePasi, nekuti zvakadzama Phase yazvino yakaenzana neyakarerekera ikozvino muchikamu chimwe chete. Ndosaka RCCB ichigona kugumbuka kana ese mairi masaisai akasiyana uye inomira kusvika kune ese magetsi akafanana. Ose asina kwaakarerekera uye echikamu mafungu akasiyana izvo zvinoreva kuti iyezvino arikuyerera kuburikidza nepasi.
• Pakupedzisira vese vari kushandira zvakafanana, asi chinhu kubatanidza mutsauko.
• RCD haidi kuti ive nehukama hwepasi pachahwo (inongotarisa chete vapenyu uye vasina kwavakarerekera) .Uyezve inoona kuyerera kwazvino kuenda pasi kunyangwe mumidziyo isina ivhu pachayo
• Izvi zvinoreva kuti RCD ichaenderera ichipa dziviriro yekuvhunduka mumidziyo ine ivhu rakaipa. Izvo zvinhu izvi zvakaita kuti RCD iwedzere kufarirwa kupfuura vavakwikwidzi vayo. Semuenzaniso, pasi-leakage circuit breakers (ELCBs) akashandiswa zvakanyanya makore gumi apfuura. Midziyo iyi yakayera voltage pane conductor yepasi; kana iri voltage rakanga risiri zero izvi zvairatidza kubuda kwazvino pasi. Dambudziko nderekuti ELCBs inoda inonzwika pasi kubatana, sezvinoita midziyo yainodzivirira. Nekuda kweizvozvo, kushandiswa kweECBBs hakuchina kukurudzirwa.
MCB kusarudzwa
• Hunhu hwekutanga kuwandisa kwakanangana nekudzivirira kuwandisa kwetsaona kwetambo mune isina mhosva mamiriro. Iko kumhanyisa kweMCB kutumbuka kunosiyana nedhigirii rekuwandisa. Izvi zvinowanzo goneswa nekushandisa kwechigadzirwa chinopisa muMCB.
• Hwechipiri hunhu hwedziviriro yemagineti, inoitirwa kushanda kana mhosho yasvika padanho rakafanotemerwa uye yekukanganisa MCB mukati megumi chechipiri chechipiri. Iyo nhanho yeiyi magnetic rwendo inopa iyo MCB mhando yayo hunhu seinotevera:
|
Type |
Kuchekerera Izvozvi |
Inoshanda Nguva |
| Rudzi B |
3 To 5 nguva yakazara mutoro uripo |
0.04 Kusvika 13 Sek |
| Type C |
5 kusvika kagumi yakazara mutoro uripo |
0.04 Kusvika 5 Sek |
| Type D |
10 kusvika makumi maviri nguva yakazara mutoro uripo |
0.04 Kusvika 3 Sek |
• Hunhu hwechitatu kuchengetedzwa kwedunhu kupfupi, kunoitirwa kuchengetedza kubva pazvikanganiso zvinorema zvimwe muzviuru zvemamipi zvinokonzerwa nezvikanganiso zvidiki zvedunhu.
Iko kugona kweMCB kushanda pasi pemamiriro aya kunopa kupfupika kwedunhu muKilo amps (KA). Kazhinji zviyero zvevatengi 6KA yekukanganisa mwero inokwana nepo kumabhizimusi mabhodhi 10KA kukanganisa kugona kana pamusoro kunogona kudikanwa.
Fuse uye MCB hunhu
• Mafusi neMCB anoverengerwa mumaps. Iyo amp chiyero chakapihwa pane fuse kana MCB muviri ndiyo huwandu hwazvino huchapfuura uchienderera. Izvi zvinowanzo kunzi yakatemerwa zvazvino kana zita razvino.
Vanhu vazhinji vanofunga kuti kana pari zvino ikadarika yazvino uno, mudziyo unogumbuka, ipapo ipapo. Saka kana chiyero chiri makumi matatu amps, yazvino ye30.00001 amps ichaikanganisa, handiti? Ichi hachisi chokwadi.
Iyo fiyuzi uye MCB, kunyangwe hazvo mazita avo akafanana, ane zvinhu zvakasiyana.
Semuenzaniso, Kune 32Amp MCB uye 30 Amp Fuse, kuve nechokwadi chekugumburwa mumasekonzi 0.1, iyo MCB inoda yazvino ye128 amps, nepo iyo fuse inoda 300 amps.
Iyo fiyuzi inonyatsoda yakawanda yazvino kuti irifuridze panguva iyoyo, asi cherekedza kuti makuru sei mairi ese magetsi pane iyo '30 amps 'yakatarwa ratidziro yazvino.
• Pane mukana mudiki wekuti mukati menguva, toti, mwedzi, 30-amp fuse ichagumbuka pakutakura makumi matatu amps. Kana iyo fiyuzi yakave nekuwandisa kuwanda zvisati zvaitika (izvo zvingangodaro zvisina kana kutomboonekwa) izvi zvingangoita. Izvi zvinotsanangura kuti nei mafiyuzi dzimwe nguva anogona 'kuputika' pasina chikonzero chiri pachena.
• Kana iyo fiyuzi yakanyorwa kuti '30 amps', asi ichinyatso kumira makumi mana amps kweinopfuura awa, tingaite sei kuti tifunge kuti i'30 amp 'fuse? Mhinduro ndeyekuti iwo ekuremekedza hunhu hwemafusi akagadzirirwa kuenzanisa zvivakwa zvetambo dzazvino. Semuenzaniso, tambo yemazuva ano yePVC-yakasungirirwa inomira yakadarika 50% kweawa imwe, saka zvinoita sezvine musoro kuti fiyuzi iite futi.
Post nguva: Dec-15-2020