Buyini ubudlelwano phakathi kwendawo ephambanayo yekhebula kanye nomsinga wekhebula, futhi ithini ifomula yokubala?

Izintambo zivame ukubizwa ngokuthi "amakhebula".Zingabathwali bokudlulisa amandla kagesi futhi ziyizimo eziyisisekelo zokwenza izihibe phakathi kwezinto zikagesi.Izingxenye ezibalulekile zokudlulisa ucingo ngokuvamile zenziwe ngezinto zethusi noma ze-aluminium.

Izindleko zezintambo ezisetshenziswa ezinhlelweni ezahlukene zihlukile.Isibonelo, izinto zensimbi eziyigugu azivamile ukusetshenziswa njengezintambo.Izintambo zingabuye zihlukaniswe ngokuvumelana nezimo zokufaka isicelo.Isibonelo, uma i-current inkulu, sizosebenzisa izintambo zamanje.

Ngakho-ke, izintambo ziguquguquka kakhulu ekusebenzeni kwangempela.Ngakho-ke, lapho sikhetha ukuthenga, hlobo luni lobuhlobo obungenakugwemeka obukhona phakathi kobubanzi be-wire kanye namanje.

Ubudlelwano phakathi kwedayimitha yocingo kanye neyamanje

Empilweni yethu yansuku zonke, izintambo ezivamile zincane kakhulu.Isizathu ukuthi umsinga abawuphethe uma besebenza mncane kakhulu.Kuhlelo lwamandla, amandla aphumayo ohlangothini oluphansi lwe-voltage ye-transformer ngokuvamile isamba samanje esisetshenziswa umsebenzisi, kusukela kumakhulu ambalwa ama-ampere kuya ezinkulungwaneni zama-ampere.

Bese sikhetha i-diameter enkulu yocingo ukuhlangabezana nomthamo owanele we-overcurrent.Ngokusobala, i-diameter yocingo ilingana ne-current, okungukuthi, i-current enkulu, indawo ephambanayo yocingo iyaqina.

Ubudlelwano phakathi kwendawo ephambanayo yocingo kanye neyamanje busobala kakhulu.Umthamo wamanje wokuthwala ucingo nawo uhlobene nezinga lokushisa.Ukuphakama kwezinga lokushisa, kukhulu ukuphikiswa kocingo, kukhulu ukumelana, futhi kukhulu ukusetshenziswa kwamandla.

Ngakho-ke, mayelana nokukhethwa, sizama ukukhetha ucingo olukhudlwana kunolwemanje olulinganiselwe, olungagwema ngokuphumelelayo lesi simo esingenhla.

Indawo ye-cross-sectional yocingo ngokuvamile ibalwa ngokuvumelana nefomula elandelayo:

Intambo yethusi: S = (IL) / (54.4 △U)

Intambo ye-Aluminium: S = (IL) / (34 △U)

Lapho: I - Ubuningi bamanje obudlula ocingweni (A)

L - Ubude bentambo (M)

△U - Ukwehla kwamandla kagesi okuvunyelwe (V)

S - Indawo ye-Cross-sectional yocingo (MM2)

I-current evame ukudlula endaweni enqamula ingxenye yocingo ingakhethwa ngokuya ngenani eliphelele lamanje okudingeka iqhutshwe, elinganqunywa ngokulandela i-jingle elandelayo:

Imvumelwano ye-wire cross-sectional area kanye neyamanje

Ishumi yisihlanu, ikhulu kubili, kubili kuhlanu kuhlanu kune imingcele emithathu, amashumi ayisikhombisa nesishiyagalolunye nanhlanu izikhathi ezimbili nengxenye, ukubala kokuthuthukiswa kocingo lwethusi

Ngezintambo ze-aluminium ezingaphansi kuka-10 mm2, phindaphinda amamilimitha ayisikwele ngo-5 ukuze wazi i-ampere yamanje yomthwalo ophephile.Ngezintambo ezingaphezu kuka-100 square millimeters, phindaphinda indawo ye-cross-sectional ngo-2;ngezintambo ezingaphansi kuka-25 square millimeters, phindaphinda ngo-4;ngezintambo ezingaphezu kuka-35 square millimeters, phindaphinda ngo-3;ngezintambo eziphakathi kuka-70 no-95 square millimeters, phindaphinda ngo-2.5.Ngezintambo zethusi, khuphuka izinga, isibonelo, amamilimitha-skwele angu-2.5 ocingo lwethusi abalwa njengamamilimitha-skwele angu-4.(Qaphela: Okungenhla kungasetshenziswa kuphela njengesilinganiso futhi akunembile kakhulu.)

Ngaphezu kwalokho, uma ingaphakathi endlini, khumbula ukuthi izintambo zethusi ezinendawo ephakathi nendawo engaphansi kuka-6 mm2, iphephile uma i-current per square millimeter ingeqi ku-10A.

Ngaphakathi kwamamitha angu-10, ukuminyana kwamanje kocingo kungu-6A/mm2, amamitha angu-10-50, 3A/mm2, amamitha angu-50-200, 2A/mm2, futhi angaphansi kuka-1A/mm2 ezintanjeni ezingaphezu kwamamitha angu-500.I-impedance yocingo ilingana nobude bayo futhi ilinganisa ngokuphambene nobubanzi bayo bocingo.Sicela unake ngokukhethekile okubalulekile kocingo kanye nobubanzi bocingo lapho usebenzisa ukunikezwa kwamandla.Ukuze uvimbele umthamo owedlulele ekushiseni ngokweqile izintambo nokudanga ingozi.