He aha kaʻO ka mea hoʻomaha kaapuni liʻiliʻi DC (MCB)?
Nā hana oDC MCBaAC MCBua like. Mālama lāua ʻelua i nā mea uila a me nā mea ukana ʻē aʻe mai ka overload a me nā pilikia pōkole, a pale i ka palekana kaapuni. akā, ʻokoʻa nā hiʻohiʻona hoʻohana o AC MCB a me DC MCB. ʻO ka mea maʻamau e hilinaʻi ʻia inā paha ka volta i hoʻohana ʻia i nā mokuʻāina o kēia manawa a i ʻole nā mokuʻāina pololei. Hoʻohana ka hapa nui o DC MCB i nā ʻōnaehana o kēia manawa e like me ka ikehu hou, solar PV, a pēlā aku.
ʻO ka ʻokoʻa ma waena o AC MCB a me DC MCB ma nā ʻāpana kino wale nō, loaʻa i ka AC MCB nā lepili o nā pahu e like me LOAD a me LINE mau pahu a ʻo ka DC MCB he hōʻailona maikaʻi (+) a i ʻole ʻino (-) ma kona pahu.
Pehea e hoʻopili pono ai i ka DC MCB?
Ma muli o ka hōʻailona '+' a me '-' DC MCB wale nō, maʻalahi pinepine ka hoʻopili hewa ʻana. Inā hoʻopili ʻia a i ʻole uea pololei ʻia ka DC miniature circuit breaker, aia nā pilikia e hiki mai ana. Inā nui ka ukana a i ʻole kaapuni pōkole, ʻaʻole hiki i ka MCB ke ʻoki i ke au a hoʻopau i ke arc, hiki i kēia ke alakaʻi i ke ahi.
No laila, he hōʻailona '+' a me '-' DC MCB, pono e kaha i ke kuhikuhi kaapuni a me nā kiʻina uwea, e like me ka hōʻike ʻana ma lalo nei.
2P 550V
4P 1000V
E like me ka uea kiʻi, 2P DC MCB i elua uea kaʻina hana, hoʻokahi ka luna i pili i ka maikai a me ka 'ole pole, 'ē aʻe kaʻina o ka lalo i pili i ka maikai a me ka ino pou e like me ka hoailona ana o '+' a me '- '. No ka 4P 1000V DC MCB he ʻEkolu mau ʻano wili, e like me nā mokuʻāina hoʻohana like ʻole, e koho i ke kiʻikuhi wili e pili ana i ka hoʻopili ʻana i ka wili.
Pili anei ʻo AC MCB i nā mokuʻāina DC?
Ke hoʻololi mau nei ka hōʻailona AC i kona waiwai no kēlā me kēia kekona. Hoʻololi ka hōʻailona uila AC mai ka maikaʻi a i ka maikaʻi ʻole i kēlā me kēia kekona o ka minuke. E pio ka MCB arc ma 0 Volts, e pale ʻia ka uwea mai kahi au nui. Akā ʻaʻole ʻokoʻa ka hōʻailona DC, kahe ia ma kahi kūlana mau a hoʻololi wale ʻia ke kumukūʻai o ka volta i ka wā e holo ai ke kaʻapuni a i ʻole e hoʻemi ʻia ke kaapuni e kekahi waiwai. A i ʻole, e hāʻawi ka DC kaapuni i ka waiwai mau o ka volta no kēlā me kēia kekona o ka minuke. No laila, ʻaʻohe wahi 0 Volt ma kahi mokuʻāina DC, ʻaʻole ia e manaʻo e pili ʻo AC MCB i nā mokuʻāina DC.
Ka manawa hoʻouna: ʻAukake-25-2020