Indlela yokukhetha i-breaker circuit efanelekileyo?

Ukukhetha okufanelekileyoumephuli wojikelezoifuna uvavanyo olubanzi lweeparamitha zesekethe, iimpawu zomthwalo, indawo yokufakela, kunye neemfuno zokukhusela. Iingqwalasela eziphambili ziqinisekisa ukuba i-voltage elinganisiweyo ihambelana ne-voltage yenkqubo, i-current rated current inkulu kunomthwalo wangoku kodwa ingaphantsi kwe-conductor current-carrying capacity, kunye nomthamo wokuqhawula (i-Icu) uphezulu kunoko kulindelwe i-short-circuit current.

UKhetho lweParameter engundoqo

I-Voltage elinganisiweyo: Kufuneka ibe ≥ i-voltage elinganisiweyo yomgca (umzekelo, isetyenziswa ngokuqhelekileyo kumakhaya 220V / 380V). I-voltage yokukhupha i-undervoltage kufuneka ihambelane ne-voltage yenkqubo.

Ikalwe ngoku:

Bala ubuninzi bokusebenza ngoku komthwalo (Ib). Khetha iumephuli wojikelezongombane olinganisiweyo (In) ohlangabezana nale miqathango ilandelayo: Ib < Ku-≤ umqhubi we-conductor okhuselekileyo ophethe amandla akhoyo (umzekelo, i-6mm² ucingo lobhedu lunomthamo okhoyo ngoku malunga ne-40A, khetha i-≤40A i-breaker circuit).

Umsebenzi okhutshwayo uyafuneka kwiindawo ezinobushushu obuphezulu (>40℃).

Ukwaphulwa kwesakhono (Icu):

Kufuneka ibe mkhulu kunomgca olindelekileyo we-short-circuit current (Ik), onokubalwa kusetyenziswa iifomyula okanye ngokubhekisela kwiitheyibhile (umzekelo, kwi-transformer umthamo we-1600kVA, Ik≈38.5kA). 3

Beka izinto ezibalulekileyo kwindawo yokuqalaabaphuli beesekethenge-Icu ≥ 50kA; kwizicelo zokuhlala, ≥ 6kA yanele.