Umahluko phakathi kwe-DC fuse Holder kunye ne-Miniature Circuit Breaker

IUmphathi we fuse DCngokuqhelekileyo ifakwe kwisiphaluka kwaye isetyenziswe ukwenzela ukuba kuqinisekiswe ukhuseleko lwesiphaluka ngexesha lokusebenza kwecandelo elibalulekileyo lombane.I-fuses ye-DC ngabakhuseli abanokubonelela ngokhuseleko lwe-short-circuit, kwaye zisetyenziswa ngokubanzi kwiinkqubo zokusasazwa kwamandla, iinkqubo zokulawula, njl.

Nje,I-DC miniature breakers yeseketheingasetyenziselwa ukuhambisa amandla ombane okanye ukuqalisa ii-asynchronous motors ngokungaqhelekanga, kunye nokukhusela iintambo zamandla kunye neenjini.Ukuba i-DC circuit breaker idibana ne-overload enzima, isiphaluka esifutshane, okanye i-undervoltage fault ngexesha lokusebenza, iya kunqumla ngokuzenzekelayo isiphaluka.Umsebenzi we-breaker circuit ufana nokudibanisa i-fuse switch kunye ne-overheating relay.

Inqaku eliqhelekileyo le-DC fuse kunye ne-mini circuit breaker: inokunqumla isiphaluka kakuhle xa isiphaluka sihluleka, ngoko kunokuthiwa zombini zixhobo zokukhusela isiphaluka, ezisetyenziselwa ukukhusela i-breaker circuit kwi-overload kunye nesiphaluka esifutshane.

Yintoni uMsebenzi we-DC Fuse Holder kunye ne-Mini Circuit Breaker?

Imida ye-DC mini ye-breaker circuit i-fuzzy.Umda wokusetyenziswa ngokuqhelekileyo wahlulahlulwe kwi-high-voltage circuit breakers kunye ne-low-voltage circuit breakers.Ngokubanzi, sihlala sibiza ii-voltages ezingaphezulu kwe-3KV njengezaphuli zesekethe ezinombane ophezulu, kunye nezaphuli zesekethe ezisezantsi zikwabizwa ngokuba ziiswitshi ezizenzekelayo.Isixhobo sombane esingenawo ukutshintshwa kwencwadana, kodwa sinezixhobo zokukhusela ezizenzekelayo zokulahleka kwe-voltage, i-undervoltage, i-overload kunye ne-short-circuit.Izaphuli zesekethe ze-DC nazo zohlulwe zibe zii-breaker circuit jikelele kunye ne-molded case circuit breakers.Ngokuqhelekileyo, akukho mfuneko yokutshintsha amacandelo kunye namacandelo emva kokuba i-fault current iphukile, kwaye isetyenziswe ngokubanzi.

Ngelixa i-DC fuse holder ingumkhuseli wangoku okhusela izixhobo zombane ngokusebenza ngoku.Emva kokuba i-current idlula ixabiso elichaziweyo kwixesha elithile, ukushisa okwenziwa yi-fuse ngokwayo kukhuthaza ukunyibilika kokunyibilika, ngaloo ndlela kuphula isiphaluka.I-fuses ye-DC isetyenziswa ngokubanzi kwiinkqubo zokusasazwa kombane ophantsi-voltage kunye neenkqubo zokulawula kunye nezixhobo zombane.Njengokhuseleko olufutshane kunye nokugqithiswa kwangoku, sesinye sezixhobo zokukhusela ezisetyenziswa ngokuqhelekileyo.

Ngoko ke, i-DC circuit breaker ingathatha indawo ye-fuse, ngokude nje ukuba i-current operating current phakathi kwe-fuse kunye ne-breaker circuit ifana ne-breaking current.Kodwa ukuba i-breaker circuit isetyenziswe njenge-fuse, ngaba i-overkill encinci?

Yintoni uMahluko phakathi kwe-DC Fuse Holder kunye ne-Mini Circuit Breaker?

Ukufana phakathi kwe-DC fuse holders kunye ne-circuit breakers kukuba banokuqonda ukhuseleko lwe-short-circuit.Umgaqo we-fuse kukuba: ukusebenzisa i-current flow through conductor kuya kutshisa umqhubi, emva kokufikelela kwindawo yokunyibilika komqhubi, umqhubi uya kunyibilika.Ngoko ke, isiphaluka sinokuqhawulwa ukukhusela izixhobo zombane kunye nemigca ekutshisweni.Kukuqokelelwa kobushushu, ngoko ke ukukhuselwa komthwalo ogqithisileyo kunokuphunyezwa, emva kokuba inyibiliki itshisiwe, inyibilika kufuneka itshintshwe.Xa umthwalo wombane kwisekethe usondele kumthwalo wefuse esetyenziswe ixesha elide, i-fuse iya kutshiswa ngokuthe ngcembe ide idibaniswe.Ukuxutywa kwe-fuse kuyisiphumo sesenzo esidibeneyo sangoku kunye nexesha, elidlala indima yokukhusela umgca.Iyalahlwa.

I-DC circuit breaker inokuqonda isiphaluka esifutshane kunye nokukhuselwa kokugqithiswa komgca, kodwa umgaqo wahlukile.Iqaphela ukhuseleko lwesaphuli sesekethe ngesiphumo sangoku samagnetic (i-electromagnetic tripper), kwaye iqonda ukhuseleko lomthwalo ogqithisiweyo ngesiphumo sobushushu sangoku.Xa i-current in circuit inyuka ngokukhawuleza kwaye idlula umthwalo we-circuit breaker, i-breaker circuit iya kuvula ngokuzenzekelayo.Lukhuselo lokunyusa umbane okhawulezileyo wesekethe, njengaxa ukuvuza kukhulu, isiphaluka esifutshane, okanye umbane okhawulezileyo umkhulu.Emva kokuba isizathu sifunyenwe, sinokuvulwa kwaye siqhubeke sisetyenziswa.

Nokuba imisebenzi kunye nemisebenzi ye-DC breaker yesekethe kunye ne-fuse iyafana, kusekho iiyantlukwano ezininzi, njengomahluko kwiindlela zokukhusela, isantya sokusebenza, amaxesha okusetyenziswa, kunye nemigaqo yokusebenza.Umahluko phakathi kwe-fuse kunye ne-breaker circuit ngolu hlobo lulandelayo:

1. Umahluko wendlela yokukhusela: indlela yokukhusela i-fuse ye-DC ithatha ifom ye-fuse.Emva kokuba i-fault phenomenon isusiwe, i-fuse idinga ukutshintshwa ukuze ubuyisele ukunikezelwa kwamandla, ngoko ke kuphazamiseka ngakumbi ukugcina.Indlela yokukhusela ye-DC ye-circuit breaker ithatha ifom yokukhwela.Emva kokuba iphoso lipheliswe, ukunikezelwa kwamandla okuqhelekileyo kunokubuyiselwa kuphela ngesenzo sokuvala, ngoko ukugcinwa kunye nokubuyisela kuya kuba lula ngakumbi kunefuse.

2. Umahluko kwisantya sokusebenza: isantya sentshukumo ye-fuse ye-fuse ye-DC inokufikelela kwinqanaba le-microsecond (μs), nto leyo ethetha ukuba isantya salo sikhawuleza kakhulu kuneso se-breaker circuit.Obu buchule bukholisa ukuba bufaneleke ngakumbi kwiimfuno zokusika ngokukhawuleza Ufakelo kunye nokusetyenziswa phantsi kweemeko.Isantya sokuhamba se-circuit breaker sikwi-milliseconds (ms).Inokubonwa ukuba icotha kakhulu kune-fuse, ngoko ifanelekile kuphela kwizihlandlo apho isantya sokusika asiphezulu kakhulu.

3. Umahluko kwinani lamaxesha okusetyenziswa: i-fuse ye-DC kufuneka itshintshwe emva kokuba ukhuseleko lwephutha lwenziwe kanye kwaye i-melt ivuthelwe, kwaye i-DC circuit breaker ingaphinda isetyenziswe kwiimeko ezininzi.Nangona kunjalo, ukusuka kumbono wesiphumo sokuphulwa kwesekethe, i-fuse iya kuba namandla ngaphezu kwe-circuit breaker, kwaye ngexesha elifanayo ngokugqithiseleyo.Kwiimeko eziqhelekileyo, i-breaker circuit ifakwe kwindlela yesebe, kwaye i-fuse ifakwe kwindlela enkulu kwiimeko ezininzi ukudlala indima yokukhusela okwesibini.

4. Umahluko kumgaqo wokusebenza: Umgaqo wokusebenza we-DC fuse usekelwe ikakhulu kwimpembelelo ye-thermal yangoku.Xa i-current idlula ixabiso elimiselweyo (izicwangciso ze-fuse ezahlukeneyo nazo zihluke), i-fuse yangaphakathi iya kubetha ukuphula isiphaluka kunye nokukhusela Izixhobo azitshiswa ngumbane ophezulu.Ngelixa kukho iintlobo ezininzi ze-DC abaphuli beesekethe kunye nemigaqo yabo yesakhiwo nayo yahlukile.Ngokuqhelekileyo, i-excitation ye-coil yohambo ibangelwa ngokugqithisileyo kwangoku kubangela ukuba i-breaker circuit yenze isenzo sokuhamba.Ngokuqinisekileyo, i-breaker circuit ayinakufezekisa ukusebenza ngokuzenzekelayo, kodwa nokulawula ngesandla ukuvulwa nokuvala izenzo ze-breaker circuit.

Kwezinye iimeko ezikhethekileyo, kukho imimiselo efunekayo ehambelanayo ecacileyo ekufuneka isebenzise iifuse ze-DC, ezifana nokukhusela ulawulo lwe-elevator, ngoko ke i-DC circuit breakers ayikwazi ukubuyisela ngokupheleleyo i-fuses.Ngaphezu koko, ixesha elifutshane lesiphaluka semodyuli ye-thyristor ye-circuit breaker lifutshane kakhulu.Kule meko, isantya sokuhamba se-breaker circuit asikwazi ukuhlangabezana neemfuno ze-short-circuit, ngoko ke umthamo wokuxubha we-fuse uye waqaphela.I-fuse ye-DC isetyenziswe ngokubanzi ekwakheni i-starter ethambileyo, ukuguqulwa kwamaxesha amaninzi kunye nezinye iinkqubo zokuhambisa.