Iingcingo zidla ngokuthi "iintambo".Zingabathwali bokuhambisa amandla ombane kwaye ziimeko ezisisiseko zokwenza iilophu phakathi kwezixhobo zombane.Amacandelo abalulekileyo okuhanjiswa kwecingo ngokuqhelekileyo ayenziwe ngobhedu okanye izinto ze-aluminium.
Iindleko zeengcingo ezisetyenziswa kwizicelo ezahlukeneyo zihlukile.Ngokomzekelo, izinto zentsimbi ezixabisekileyo azifane zisetyenziswe njengeingcingo.Iingcingo zinokwahlulwa ngokwemiqathango yesicelo.Umzekelo, ukuba umsinga mkhulu, siya kusebenzisa iingcingo eziphezulu.
Ke ngoko, iingcingo zibhetyebhetye kakhulu kwizicelo zangempela.Ngoko ke, xa sikhetha ukuthenga, luhlobo luni lobudlelwane obungenakuphepheka obukhoyo phakathi kobubanzi bocingo kunye nekhoyo ngoku.
Ubudlelwane phakathi kwedayimitha yocingo kunye neyangoku
Kubomi bethu bemihla ngemihla, iingcingo eziqhelekileyo zincinci kakhulu.Isizathu kukuba umsinga abawuphetheyo xa besebenza umncinci kakhulu.Kwinkqubo yamandla, imveliso yangoku yecala eliphantsi le-voltage ye-transformer ngokuqhelekileyo isixa sangoku esisetyenziswe ngumsebenzisi, ukusuka kumakhulu ambalwa ama-ampere ukuya kumawaka ama-ampere.
Emva koko sikhetha i-diameter enkulu yocingo ukuhlangabezana nomthamo owaneleyo we-overcurrent.Ngokucacileyo, i-diameter ye-wire ilingana ne-current, oko kukuthi, i-current, i-higher ye-cross-sectional area yocingo.
Ubudlelwane phakathi kwendawo enqamlezayo yocingo kunye neyangoku icacile kakhulu.Umthamo wangoku wokuthwala ucingo nawo unxulumene nobushushu.Ukuphakama kweqondo lokushisa, ubukhulu be-resistivity bocingo, ukuxhathisa okukhulu, kunye nokusetyenziswa kwamandla amakhulu.
Ngoko ke, ngokubhekiselele ekukhethweni, sizama ukukhetha ucingo olukhudlwana kunomlinganiselo wangoku, onokuthi uphephe ngokufanelekileyo le meko ingentla.
Indawo enqamlezileyo yocingo ibalwa ngokubanzi ngokwefomula ilandelayo:
Ucingo lobhedu: S = (IL) / (54.4 △U)
Ucingo lweAluminiyam: S = (IL) / (34 △U)
Apho: Mna — Ubuninzi bangoku obugqitha ngocingo (A)
L — Ubude bocingo (M)
△U — Ukuhla kwamandla ombane okuvumelekileyo (V)
S - Indawo enqamlezileyo yocingo (MM2)
Umjelo onokuthi uqhele ukudlula kwindawo enqamlezileyo yocingo unokukhethwa ngokwexabiso elipheleleyo langoku ekufuneka liqhube, elinokuthi ligqitywe ngokuhambelana nale jingle ilandelayo:
Isicengcelezo socingo kwindawo enqamlezileyo kunye neyangoku
Ishumi elinesihlanu, ikhulu linesibini, mbini isihlanu ntathu isihlanu emine imida emithathu, amashumi asixhenxe anesithoba anesihlanu amabini anesiqingatha amaxesha, ucingo lobhedu luphucula ukubala
Kwiingcingo ze-aluminium ngaphantsi kwe-10 mm2, phinda-phinda i-square millimeters nge-5 ukwazi i-ampere yangoku yomthwalo okhuselekileyo.Kwiingcingo ezingaphezulu kwe-100 square millimeters, phinda-phinda indawo ye-cross-sectional nge-2;kwiingcingo ezingaphantsi kwe-25 square millimeters, ziphindaphinda ngo-4;kwiingcingo ezingaphezulu kwe-35 square millimeters, ziphindaphinde ngo-3;kwiingcingo phakathi kwe-70 kunye ne-95 ye-square millimeters, phindaphinda ngo-2.5.Kwiingcingo zobhedu, nyuka kwinqanaba, umzekelo, i-2.5 square millimeters yocingo lwethusi ibalwa njenge-4 millimeters square.(Qaphela: Oku kungasentla kunokusetyenziswa kuphela njengoqikelelo kwaye akuchanekanga kakhulu.)
Ukongeza, ukuba ingaphakathi, khumbula ukuba iingcingo zobhedu ezinendawo enqamlezayo engaphantsi kwe-6 mm2, ikhuselekile ukuba i-millimeter yangoku nganye ayidluli kwi-10A.
Ngaphakathi kweemitha ezili-10, ukuxinana kwangoku kocingo yi-6A/mm2, i-10-50 yeemitha, i-3A/mm2, i-50-200 yeemitha, i-2A/mm2, kwaye ingaphantsi kwe-1A/mm2 kwiingcingo ezingaphezu kweemitha ezingama-500.I-impedance yocingo ilingana nobude bayo kwaye ihambelane ngokungafaniyo nobubanzi bocingo.Nceda uhlawule ingqalelo ekhethekileyo kwizinto zocingo kunye nedayimitha yocingo xa usebenzisa umbane.Ukuthintela umsinga ogqithisileyo ekutshiseni iingcingo nokubangela ingozi.
Ixesha lokuposa: Jul-01-2024
