UCanwin yiNkampani yeNkampani yoTshintsho lwaMandla kunye noMvelisi woMbane woMbane
Ulwimi
UCanwin yiNkampani yeNkampani yoTshintsho lwaMandla kunye noMvelisi woMbane woMbane
I-short-circuit current breaking capacity ye-low-voltage side breaker ye-transformer yokusabalalisa incinci kakhulu; impembelelo ye-thermal uzinzo lwangoku lwentambo ayiqinisekiswanga kwinkqubo yokusabalalisa i-voltage ephantsi, ekhokelela kwindawo encinci ye-cross-sectional yezinye iintambo zesekethe zokusabalalisa kwi-low-voltage distribution system.
Kuba idatha yenkqubo yomthamo wesekethe emfutshane kunye nokuphazamiseka kwexesha elifutshane kufuneka kubonelelwe lisebe lobonelelo lombane, uyilo lombane kwiiprojekthi ezininzi zokwakha alwenzi izibalo ezichanekileyo zangoku zesekethe emfutshane ngoku.
Indlela echanekileyo: Bala i-short-circuit current ye-low-voltage side ye-transformers yamandla ahlukeneyo eprojekthi nganye, kubandakanywa ubuncinci bexabiso eliphezulu le-short-circuit current: ip
I-RMS yangoku yeSekethe emfutshane eZinzileyo: Ik
Xa ukhetha i-breaker circuit, ubuncinci ubuncinci obulinganiselweyo bokuphela kwesaphuli sesekethe kufuneka siqinisekiswe:Icu
Hayi ngaphantsi kwe: Ik
Kwiprojekthi nganye, intambo eneyona ndawo incinci ye-cross-sectional kunye nendlela emfutshane kufuneka ikhethwe kwi-short-circuit yangoku yokuqinisekisa ukuzinza kwe-thermal, kunye ne-terminal yomthwalo kunye neyona ndlela ende yokusabalalisa kufuneka ikhethwe ukuhlalutya ukuhla kwamandla ombane. Ukuba i-cable cross-sectional area ayihlangabezani neemfuno, i-cable cross-sectional area kufuneka ilungiswe.
Phantsi komqathango wokuba umthamo wenkqubo awunasiphelo, iiparamitha zangoku zesekethe kwindawo yokuphuma kwicala le-voltage ephantsi ye-transformer ehambelana nomthamo owahlukileyo kunye neeparamitha zombane we-impedance omfutshane kufuneka ibe mkhulu kunomthamo wesekethe yeprojekthi yokwenyani. omthamo wayo wendlela emfutshane wenkqubo awunasiphelo. Ingasetyenziselwa ukujonga ukuhanjiswa kwe-voltage ephantsi. Umthamo wokuqhawula we-breaker circuit yombane.
Ngomnye umzekelo, unokubonwa kwitheyibhile yokukhetha i-short-circuit current ye-low-voltage copper core XLPE cables ukuba i-transformers ye-1000kVA nangaphantsi, indawo enqamlezayo yentambo yokusabalalisa kwibhasi ye-voltage ephantsi ayiyi kungena. ibe ngaphantsi kwe-10mm2; kubaguquli abakhulu kune-1000kVA, indawo ye-cross-sectional yentambo yokusabalalisa ayiyi kuba ngaphantsi kwe-16mm2.
Kwiiprojekthi zolwakhiwo zikawonke-wonke ezinkulu okanye ezibalulekileyo, ukubalwa kwangoku kwesekethe emfutshane kuyacetyiswa xa umsinga omfutshane unempembelelo enkulu ekukhetheni izixhobo.
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