Musoro: Kunzwisisa Kukosha kweZvidziviriro zveDunhu reKudonhedza Mvura
suma
Munyika yanhasi uko kuchengetedzeka kwemagetsi kuri chinhu chakakosha,maresidual current circuit breakers (RCCBs)vanoita basa guru mukuchengetedza kuchengetedzeka kwehupenyu hwevanhu nezvinhu zvavo. Kunyange hazvo vazhinji vangave vasingazive izwi iri,RCCBschikamu chakakosha chechero sisitimu yemagetsi. Chinyorwa chino chinangwa ndechekujekesa kukosha kwema residual current circuit breakers, basa rawo uye zvakanakira pakudzivirira kuiswa kwemagetsi.
Ndima 1: Chii chinonzichinhu chinopwanya dunhu chinobuda pasi?
Chinopwanya dunhu chinosara, chinowanzozivikanwa seRCCB, chishandiso chemagetsi chakagadzirirwa kuchengetedza vanhu nemidziyo yemagetsi kubva mukuvhunduka kwemagetsi uye njodzi dzemoto dzinokonzerwa nekubuda kwemagetsi. Zvichitaurwa zviri nyore,RCCBInotarisa magetsi ari mudunhu uye inokanganisa magetsi kana ikaona kusawirirana kwemagetsi. Kusawirirana uku kunogona kukonzerwa nekubuda kwemvura, zvikanganiso zvekudzivirira kupisa, kana kusangana zvakananga nema conductors aripo.
Ndima 2: Chii chinoita kutibasa rekupwanya dunhu rekubuda kwepasi?
Ma "leakage current breakers" ane ma "sensitive current transformers" ayo anoyera current kuburikidza nema "live" ne "neutral conductors". Chero nguva paine musiyano pakati pe "input current" ne "return current", zvinoreva kuti pane "leakage" kana kuti "fault".RCCBInoona musiyano uyu uye inokurumidza kukanganisa circuit, ichicheka simba kudzivirira kukuvara kwakawanda.
Ndima yechitatu: zvakanakira ma "leakage circuit breakers"
Kuisa chinodzivirira kubuda kwemhepo (earth leakage circuit breaker) kune mabhenefiti akawanda panyaya dzekuchengetedza nekudzivirira. Chekutanga, zvinogona kuderedza zvakanyanya njodzi yekuvhunduka kwemagetsi nekuona kusawirirana kudiki mudunhu uye kukanganisa simba nekufamba kwenguva. Chechipiri,RCCBsZvakakosha pakudzivirira moto unokonzerwa nemagetsi, sezvo uchikurumidza kupindura kumagetsi asingaenderane nemamiriro ezvinhu, zvichideredza mukana wekupisa zvakanyanya uye kutenderera kwemagetsi.
Pamusoro pezvo, ma "leakage circuit breakers" anogona kukurumidza kubvisa magetsi kana paine kubuda kwemvura kana kutadza kushanda, zvichipa dziviriro yekuwedzera kumidziyo nemidziyo. Nekuita izvi, michina inokosha inogona kudzivirirwa kubva mukukuvadzwa kunogona kuitika, zvichikonzera kuchengetedza mari uye hupenyu hurefu.
Ndima 4: Mhando dzema "earth leakage circuit breakers"
Kune mhando mbiri huru dzeRCCBs: Mhando yeAC nerudzi rweA. Mhando yeAC RCCBs dzinowanzo shandiswa munzvimbo dzekugara kudzivirira kubva kumafungu emvura anochinja-chinja e sinusoidal. Aya maRCCBs akakodzera kudzivirira kubva kuzvinhu zvinowanzobuda mvura zvakaita sekusawirirana, waya dzakakuvara, uye kutadza kwemidziyo.
Kune rumwe rutivi, maRCCB erudzi rweA akanyanya kunaka uye anopa dziviriro yakawedzerwa nekuwedzera alternating current nepulsating direct current (DC). MaRCCB aya anowanzoiswa mumabasa ehunyanzvi akadai sezvipatara, nzvimbo dzemaindasitiri uye uko kunoshandiswa michina yemagetsi inonzwisisika. MaRCCB erudzi rweA anodzivirira zvizere kubva kuzvikanganiso zveAC neDC pasina mukana wekukanganisa.
Ndima 5: Kukosha kwekugara uchiverengaRCCBkuyedzwa nekugadzirisa
Kunyange zvazvo ma residual current circuit breakers akakosha zvikuru pakuchengetedzwa kwemagetsi, zvakakoshawo kunzwisisa kukosha kwekuyedza nekugadzirisa nguva dzose. Kufanana nemimwe michina yemagetsi,RCCBskukwegura nekufamba kwenguva, zvichideredza kushanda kwazvo kana kutokundikana. Nokudaro, kuyedzwa nekugadzirisa nguva dzose kunofanirwa kurongwa kuti kuve nechokwadi chekutiRCCBiri kushanda zvakanaka uye inodzivirira njodzi dzemagetsi dzingangoitika.
Ndima 6: Mhedziso
Mukupedzisa, ma residual current circuit breakers chikamu chakakosha chemagetsi emazuva ano, zvichipa dziviriro yakakosha kubva mukuvhunduka kwemagetsi nenjodzi dzemoto. RCCB inogona kuona kusawirirana kwemagetsi nekukanganisa dunhu nenguva, izvo zvinogona kuvandudza zvakanyanya kuchengetedzeka kwekushandiswa kwemagetsi nekuchengetedza hupenyu nepfuma. Nekudyara mari muRCCB dzemhando yepamusoro, kusarudza mhando yakakodzera yekushandisa kwega kwega, uye kuita bvunzo nekugadzirisa nguva dzose, tese tinogona kugadzira nharaunda yakachengeteka yemagetsi kwatiri nezvizvarwa zvinotevera.
Nguva yekutumira: Chikunguru-06-2023