Xa ukhetha i-air circuit breaker, kufuneka uhlolisise izalathisi eziphambili zobugcisa.

Xa kuyilwa kwaye kukhethwa ii-air circuit breakers, izalathisi zobugcisa eziphambili ekufuneka zihlolwe zezi zilandelayo. Ezi zalathisi zobugcisa zidlala indima ebalulekileyo ekuqinisekiseni ukhuseleko kunye nokusebenza kakuhle kwenkqubo yombane apho kufakwa khona ii-air circuit breakers.

Okokuqala, ireyithingi ye-voltage yeiqhekeza lesekethe yomoyayinto ephambili ekufuneka iqwalaselwe.I-ACBkufuneka ihambelane neemfuno ze-voltage zenkqubo yombane. Uluhlu lwe-voltage olulinganisiweyo yi-AC200 ukuya kwi-690V kunye ne-DC250 ukuya kwi-400V, ngoko ke i-voltage elinganisiweyo ye-air circuit breaker kufuneka ihambelane ne-voltage yenkqubo.

Esinye isibonakaliso esibalulekileyo sobuchwephesha yi-rated current (Inm) yesakhelo se-low-voltage circuit breaker. Iintlobo ezahlukeneyo zeempawu zinemigangatho eyahlukeneyo yamandla kwaye kubalulekile ukuphonononga ngononophelo ulwazi lobuchwephesha lwemveliso ukuqinisekisa ukuba iyahlangabezana neemfuno zenkqubo yombane.

Umlinganiselo wangoku (In) we-low voltage circuit breaker nawo ubalulekile. Ukhetho kufuneka lusekelwe kumthamo we-transformer oyiliweyo (kV·A) kunye nohlalutyo oluneenkcukacha lwedatha yobugcisa yemveliso efunekayo.

Umthamo wokwaphuka kokusebenza olinganiselweyo (ii-Ics) luphawu oluphambili lokusebenza kunye nokuthembeka kwe-air circuit breaker. Kubalulekile ukukhetha imveliso enomthamo wokwaphuka ofanelekileyo ngokusekelwe kumanqanaba omthwalo, uhlobo lolwakhiwo kunye neemeko zemali.

Ukongeza, umthamo wokuqhekeza oqikelelweyo (Icu), umthamo wokuxhathisa oqikelelweyo wexesha elifutshane (Icw), inani leepali, njl. zonke ziyimpawu ezibalulekileyo zobugcisa ekufuneka zivavanywe xa kukhethwa i-air circuit breaker.

Xa uphonononga ezi nkcukacha, kubalulekile ukuqwalasela iimfuno ezithile kunye neempawu zenkqubo yombane apho kufakwe khona i-air circuit breaker. Ngokuvavanya ngononophelo ezi nkcukacha, i-air circuit breaker inokukhethwa ukuze ihambelane neemfuno zenkqubo yakho yombane, ukuqinisekisa ukhuseleko, ukuthembeka kunye nokusebenza kakuhle.