Zvimiro zveResidual Current Devices (RCDs)

Residual Current Devices (RCDs), inozivikanwawo seResidual Current Circuit Breakers (RCCBs), zvakakosha zvekuchengetedza maturusi mumagetsi masisitimu. Vanodzivirira vanhu kubva kumagetsi uye vanobatsira kudzivirira moto unokonzerwa nematambudziko emagetsi. RCDs inoshanda nekutarisa nguva dzose magetsi anoyerera kuburikidza newaya. Kana vakacherechedza kuti mamwe magetsi ari kubuda paasingafaniri kubuda, vanobva vadzima magetsi. Ichi chiito chekukurumidza chinogona kuponesa hupenyu nekumisa majekiseni ane njodzi emagetsi zvisati zvaitika.

MaRCD anonyanya kukosha munzvimbo dzinosangana mvura nemagetsi, senge dzimba dzekugezera nekicheni, nekuti mvura inogona kuita kuti magetsi awedzere. Izvo zvakakoshawo panzvimbo dzekuvaka uye kune dzimwe nzvimbo uko njodzi dzemagetsi dzinogona kuitika nyore. MaRCD anogona kuona kunyange mashoma emagetsi ari kurasika, izvo zvinoita kuti ave akanaka kwazvo pakuchengetedza vanhu. Ivo vanoshanda pamwe chete nemamwe matanho ekuchengetedza, senge wiring yakakodzera uye pasi, kuita kuti masisitimu emagetsi ave akachengeteka sezvinobvira. Munyika dzakawanda, mitemo inoda kuti maRCD aiswe mudzimba nenzvimbo dzebasa nekuti akanyanya kunaka pakudzivirira tsaona. Pakazere, maRCD anoita basa rakakosha mukuita kuti kushandisa kwedu kwemazuva ese kwemagetsi kuve kwakachengeteka.

Zvimiro zveResidual Current Devices (RCDs)

High Sensitivity to Leakage Current

MaRCD akagadzirirwa kuona mashoma mashoma emagetsi ari kuenda kwaasingafanirwe kuenda. Izvi zvinonzi leakage current. MaRCD mazhinji anogona kuona kuvuza kudiki se30 milliamps (mA), chinova chikamu chidiki chemagetsi anowanzo kuyerera mudunhu. Mamwe maRCD anoshandiswa munzvimbo dzinowedzera-sensitive anogona kuona zvishoma se10 mA. Uku kunzwisiswa kwepamusoro kwakakosha nekuti kunyange magetsi mashoma anoyerera nemuviri wemunhu anogona kuva nengozi. Nekuona uku kudonha kudiki, maRCD anogona kudzivirira kuvhunduka kwemagetsi asati akuvadza. Ichi chimiro chinoita kuti RCDs ive yakachengeteka kupfuura yakajairwa yedunhu breakers, iyo inongobata kune akakura matambudziko.

Fast Tripping Mechanism

Kana RCD yaona dambudziko, inoda kuita nekukurumidza kudzivirira kukuvadza. RCDs dzakagadzirirwa "kufamba" kana kuvhara simba muchikamu chechipiri. MaRCD mazhinji anogona kucheka simba mune isingasviki 40 milliseconds (ndiyo 40 zviuru zvesekondi). Kumhanya uku kwakakosha nekuti kunogona kuita mutsauko pakati pekukatyamadzwa kwakapfava nekukatyamadza kana kuuraya magetsi. Iyo inokurumidza kutsika meshini inoshanda nekushandisa yakakosha switch iyo inokonzereswa nekuonekwa kwekudonha kwazvino. Ichi chiito chekukurumidza ndicho chinoita kuti maRCD ashande pakudzivirira kukuvara kwemagetsi.

Otomatiki Reset Kugona

MaRCD mazhinji emazuva ano anouya neotomatiki reset chimiro. Izvi zvinoreva kuti mushure mekunge RCD yagumburwa uye dambudziko ragadziriswa, rinogona kutendeuka pacharo pasina mumwe munhu anofanirwa kuigadzirisa nemaoko. Izvi zvinobatsira mumamiriro ezvinhu apo nyaya yenguva pfupi inogona kunge yakakonzera RCD kuti ifambe, sekunge simba rinoputika panguva yekutinhira. Zvisinei, zvakakosha kuziva kuti kana RCD ikaramba ichitsika, zvinowanzoreva kuti pane dambudziko rinoramba riripo rinoda kugadziriswa nenyanzvi yemagetsi. Iyo otomatiki reset chimiro chakagadzirirwa kuenzanisa nyore nekuchengetedza, kuve nechokwadi chekuti simba rinodzoserwa nekukurumidza kana zvakachengeteka kuzviita.

Test Bhatani

RCDs dzinouya nebhokisi rekuedza rinobvumira vashandisi kutarisa kana chigadzirwa chiri kushanda zvakanaka. Paunodzvanya bhatani iri, rinogadzira diki, rinodzorwa rekudonha kwezvino. Izvi zvinoteedzera mamiriro ekukanganisa, uye kana RCD iri kushanda nemazvo, inofanira kukurumidza kufamba. Zvinokurudzirwa kuedza maRCD nguva dzose, kazhinji kamwechete pamwedzi, kuti uone kuti ari kushanda nemazvo. Ichi chakareruka chimiro chinopa vashandisi nzira iri nyore yekuona kuti yavo yekuchengetedza yakagadzirira kuvadzivirira kana kukanganisa chaiko kukaitika. Kugara uchiyedzwa kunobatsira kubata chero matambudziko neRCD pachayo pasati paitika njodzi.

Sarudzo uye Nguva-inononoka Sarudzo

Mamwe maRCD, kunyanya ayo anoshandiswa mumasisitimu makuru kana akaomarara emagetsi, anouya nesarudzo kana nguva-inononoka sarudzo. Aya maficha anobvumira iyo RCD kurongeka nemamwe maturusi ekudzivirira muhurongwa. RCD inosarudza inogona kusiyanisa pakati pechikanganiso mudunhu rayo uye chikanganiso chinopfuurira pasi pemutsara, ichigumburwa chete kana zvichidikanwa kuparadzanisa nzvimbo ine dambudziko. Nguva-inononoka maRCD anomirira nguva pfupi asati agumburwa, achibvumira kuvhiya kwechinguvana kupfuura pasina kucheka simba. Idzi sarudzo dzinonyanya kubatsira mumaindasitiri ezvivakwa kana zvivakwa zvakakura uko kuchengetedza magetsi kwakakosha, uye uko kune akawanda akaturikidzana ekudzivirira aripo.

Dual Basa: RCD uye Circuit Breaker Yakasanganiswa

Midziyo mizhinji yemazuva ano inosanganisa mabasa eRCD neayo enguva dzose anotyora dunhu. Aya anowanzo kunzi RCBOs (Residual Current Breaker neOvercurrent protection). Iri basa rehuviri rinoreva kuti mudziyo unogona kudzivirira kubva kune ese ari maviri ekudonha ikozvino (seyakajairwa RCD) uye yakawandisa kana mapfupi maseketi (seyakajairwa wedunhu breaker). Izvi zvakasanganiswa kushanda zvinochengetedza nzvimbo mumapanera emagetsi uye zvinopa kuchengetedzwa kwakazara mumudziyo mumwe chete. Zvinonyanya kubatsira mudzimba nemabhizinesi madiki uko nzvimbo yemidziyo yemagetsi inogona kushomeka.

Yakasiyana Sensitivity Ratings kune akasiyana maApplication

MaRCD anouya neakasiyana sensitivity ratings kuti aenderane akasiyana maapplication. Chiyero chakajairika chekushandiswa kwemhuri ndeye 30 mA, iyo inopa chiyero chakanaka pakati pekuchengetedza uye kudzivirira kutsika kusingakoshi. Zvisinei, mune mamwe mamiriro ezvinhu, kunzwisiswa kwakasiyana kunodiwa. Semuyenzaniso, munzvimbo dzemaindasitiri panoshandiswa michina mikuru, rwendo rwepamusoro (se100 kana 300 mA) runogona kushandiswa kudzivirira kugumburwa kunokonzerwa nekushanda kwemuchina. Nekune rimwe divi, munzvimbo dzisingatarisirwi dzakaita semadziva ekushambira kana zvivakwa zvekurapa, mafambiro ekufamba (se10 mA) anogona kushandiswa kuchengetedza zvakanyanya. Uhu huwandu hwekunzwa hunobvumira RCDs kuti igadziriswe kune chaiyo inodiwa yenzvimbo dzakasiyana.

Mhedziso

Residual Current Devices (RCDs)zvakakosha pakuchengetedzwa kwemagetsi mudzimba dzedu nenzvimbo dzebasa. Vanokurumidza kuona uye kumisa kubuda kwemagetsi kune ngozi, kudzivirira kuvhunduka uye moto. Iine maficha akadai seyakanyanya kunzwa, kukurumidza kuita, uye kuyedza kuri nyore, maRCD anopa dziviriro yakavimbika. Vanogona kushanda munzvimbo dzakasiyana-siyana, kubva kudzimba dzekugezera kusvika kumafekitari, vachigadzirisa kune zvakasiyana-siyana zvinodiwa. Mamwe maRCD anotobatanidza mabasa akawanda, achiita kuti abatsire zvikuru. Kugara tichiyedzwa kunobatsira kuona kuti vanogara vakagadzirira kutidzivirira. Sezvatinoshandisa mamwe magetsi emagetsi muhupenyu hwedu hwezuva nezuva, maRCD anotonyanya kukosha. Zvinotipa rugare rwepfungwa, tichiziva kuti takadzivirirwa pangozi dzemagetsi. Pakazara, maRCD anoita basa rakakosha kutichengeta takachengeteka pamagetsi.