Iikhrayitheriya ezibalulekileyo zokukhetha i-MCCB enezibonda ezi-4

UkukhethaI-MCCB yePole ezi-4kufuna okungaphezulu nje kokulinganisa amanqaku angoku. Kwiinkqubo zanamhlanje zokusasazwa kwamandla, ukhetho olufanelekileyo luqinisekisa ukhuseleko lombane, uzinzo lwenkqubo, kunye nokuthobela imigangatho yamazwe ngamazwe, ingakumbi kwiinkqubo zamanqanaba amathathu apho ukhuseleko olungathathi cala lubaluleke kakhulu.

1. Iimfuno zoMgangatho wangoku nowokuPhuculwa koMgangatho

Umbane olinganisiweyo kufuneka uhambelane neemeko zomthwalo wokwenyani ngelixa uvumela indawo yokwandiswa kwexesha elizayo. Okubaluleke ngokulinganayo kukubakho kokwaphuka, okumisela amandla esixhobo okuphazamisa ngokukhuselekileyo imisinga yempazamo. Ukwaphuka okunganelanga kunokubangela umonakalo omkhulu kwizixhobo ngexesha leziganeko ze-short-circuit.

2. Ukuhambelana kweVoltage yeSystem kunye neFrequency

Ukuhambelana ne-voltage yenkqubo kunye ne-frequency kubalulekile ukuze kusebenze ngokuzinzileyo. Iinkqubo zokusasazwa kwe-voltage ephantsi zihlala zisebenza kumanqanaba e-voltage aqhelekileyo kunye ne-frequency, kwaye ukukhetha izixhobo ezenzelwe ezi parameters kunceda ukuthintela uxinzelelo lwe-insulation, ubushushu obugqithisileyo, kunye nokungasebenzi kakuhle kwangaphambi kwexesha.

3. Ukhuseleko lwePole engathathi cala kunye noQwalaselo lokuTshintsha

Uyilo lwepali engathathi cala ludlala indima ebalulekileyo kukhuseleko lwenkqubo. Ngokuxhomekeke kwisicelo, ipali engathathi cala inokukhuselwa ngokupheleleyo, itshixwe kuphela, okanye iqhagamshelwe ngokuqinileyo. Ikhethwe ngokufanelekileyoI-MCCB yePole ezi-4kunceda ukunciphisa iingozi ezinxulumene nemithwalo engalinganiyo, imisinga ye-harmonic, kunye neziphene zomqhubi ongathathi cala.

4. Uhlobo lweYunithi yohambo kunye nemisebenzi yokukhusela

Iyunithi yokuhamba ichaza indlela i-circuit breaker esabela ngayo kwiimeko ezingaqhelekanga. Iiyunithi zokuhamba ze-thermal-magnetic zibonelela ngokhuseleko olusisiseko oluthembekileyo, ngelixa iiyunithi zokuhamba ze-elektroniki zibonelela ngoseto oluhlengahlengiswayo, ukhuseleko oluchanekileyo, kunye nokubeka esweni okuphambili. Ukukhetha kufuneka kusekelwe kubunzima kunye nobunzima benkqubo yombane.

5. Imigangatho yoFakelo kunye neMigangatho yokuThotyelwa kweMigangatho

Izinto ezikwimo engqongileyo ezifana nobushushu, ukufuma, ukungcangcazela, kunye neemfuno zokuvala zichaphazela ubomi bemveliso kunye nokusebenza kwayo. Ukuthobela imigangatho yamazwe ngamazwe efana ne-IEC okanye i-UL kuqinisekisa ukuba isixhobo sihlangabezana nemigangatho yokhuseleko kunye nokusebenza eyaziwayo, okwenza kube lula ukuvunywa kunye neenkqubo zokuhlola.

Isiphelo

Ukukhetha okulungileyoI-MCCB yePole ezi-4kubandakanya ukulinganisela ukulinganiswa kombane, iimpawu zokhuseleko, ukuphathwa okungathathi cala, kunye nokuqwalaselwa kwendalo. Isisombululo esifanelekileyo siphucula ukuthembeka kwenkqubo, siphucula ukhuseleko, kwaye sixhasa ukusebenza kakuhle kwexesha elide kuzo zonke izicelo zoshishino kunye nezorhwebo.

FAQ

Q1: Kutheni ukutshintsha iipali ezingathathi cala kubalulekile kwiinkqubo zezigaba ezintathu?
A: Ukutshintsha iipali ezingathathi cala kunceda ukulawula imithwalo engalinganiyo kwaye kunciphisa umngcipheko wokushisa kakhulu kwe-conductor engathathi cala okanye ukungazinzi kwe-voltage.

Umbuzo 2: Ngaba iiyunithi zokuhamba nge-elektroniki zisoloko zingcono kunezo ze-thermal-magnetic?
A: Akunjalo rhoqo. Iiyunithi zokuhamba nge-elektroniki zibonelela ngokuguquguquka nokuchaneka ngakumbi, kodwa iiyunithi ze-thermal-magnetic zihlala zanele ukusetyenziswa lula.

Umbuzo 3: Ngaba i-circuit breaker efanayo ingasetyenziswa kwiindawo ezahlukeneyo?
A: Kuphela xa ihlangabezana neemfuno zokusingqongileyo kunye nokuvalwa kwendawo nganye yokufaka.

Iingxelo zoMxholo

1. I-IEC 60947-2–Iswitshi ye-voltage ephantsi kunye ne-controlgear - Ii-circuit breakers
   IKhomishini yeHlabathi ye-Electrotechnical (IEC)

2. UL 489–Umgangatho wee-Molded-Case Circuit Breakers
   IiLebhu ze-Underwriters (UL)

3. Umbutho weMigangatho ye-IEEE
   Iindlela eziCetyisiweyo ze-IEEE kwiiNkqubo zamandla eMizi-mveliso nezoRhwebo

4. Izikhokelo zoBugcisa zeSchneider Electric
   Ukukhethwa kunye noSetyenziso lweSiqhekezo seSigqekembe seTyala eliMolded Case

5. Amaxwebhu oMbane we-ABB
   Izixhobo zoKhuseleko zoSasazo lwaMandla aPhantsi