Kungani i-MCCB isetshenziswa kakhulu ekusakheni kwemitha yezimali ephansi emagumbini?

Iziphumo ze-MCCB kulokho okunconywa kakhulu kokulinda imitha yezimali yezindustria

I-MCCB zinikeza izilonda ezibalulekile kumitha yezimali yezindustria ngokusebenzisa iziphumo ezimbili zokufunda. I-MCCB ethu zisakhiwe ukuze zinikeze ukuthembeka kokusebenza kuzo zonke izimo ezinzima eziphathelene nezindustria zemagumbini.

Amabrekha wezindustria wezincamango nezincamango zezinye zinikeza ukuthintwa kwemitha yezimali kwe-10–200 kA nokuthatha kwemitha yezimali kwe-2500 A.

Izikhiphi zesekethe ezenziwe ngezikhwama zinikeza isixazululo sikagesi sokuvikela izitshalo zezimboni. Izitshalo zokukhiqiza zisebenzisa amandla amaningi ukuze zisebenze imishini yazo, okusho ukuthi izitshalo zingabhekana namaphutha kagesi ayingozi kakhulu. Ngokwesibonelo, ucingo olungabonakali lungadala i - short circuit futhi luholele ekugelezeni kwamanje okufinyelela ku - 200,000 A. Lokhu kungase kubangele umonakalo omkhulu, ongalungiseki, futhi mhlawumbe obeka ukuphila engozini. Ama-MCCB anikeza isixazululo ngoba angamelana namanzi aqhubekayo afinyelela ku-2500 amps. Uma kwenzeka iphutha noma inkinga kagesi, ama-MCCB agcina ukuphazamiseka kwawo engxenyeni yohlelo lukagesi lapho iphutha lenzeke khona. Izitshalo zokukhiqiza, ikakhulukazi izitshalo zensimbi, zivame ukubhekana nezingozi ze-arc flash. Lokhu kungenxa yokwanda kwamanje okuphambene okungaphezulu kuka-100 kA. Nokho, izitshalo zensimbi ezihlome nge-MCCB yokuvikela ezenzelwe izimo zephutha ezingu-150 kA zinganciphisa amathuba okuthi kube khona izigameko ze-arc flash. I-MCCB ihlinzeka ngemisebenzi eminingi yokuvikela ukulimala kwe-MCCB, ukuvikela ukulimala kwe-MCCB, ukuvikela ukulimala kwe-MCCB, ukuvikela ukulimala kwe-MCCB, ukuvikela ukulimala kwe-MCCB, ukuvikela ukulimala kwe-MCCB, uku Eqinisweni, ukuvikelwa okuhloswe kahle ngezimo zokuphazamiseka kukagesi kohlelo kungahlotshaniswa nokwehla kuze kufike ku-75% kwezindleko ezihlobene nokushintshwa kwemishini kagesi.

Izisikhombisa sokugcina ukuphakama kwezimithombo, nezisikhombisa sokugcina ukubhekana ngokushesha, zihlinzekile ukuthi zilindise izimithombo ezingaphakamile ngaphandle kokufaka izinto eziningi, futhi ziyasebenza kabusha.

Ngokunikeza ukhuseleko lwesikhathi esihlukile nekuthuluzwa kwezinhlayiya, izinhlangano zokuthuluzwa kwezinhlayiya nezinhlayiya zokuthuluzwa zinikeza ukhuseleko olukhulu kakhulu ngokuphatha kwezinhlayiya. Iqembu lokuthuluzwa libhekisele amandla okuphakama okudlula okuphakamile kakhulu ngokusebenzisa amaphakade amabili, okwenzeka uma amandla ayadlula kakhulu. Lokhu kubalulekile kakhulu kumotola wokuhamba okufanele akhululeke ngokuphakama kwe-130% yamandla ekusukweni. Ukukhuseleka okwengeziwe kufanele kubhekiswe ekuphakamiseni kwamandla okuphakama kakhulu. Amaphakade amathree abhekisele ekuphakamiseni kwamandla okuphakama kakhulu phakathi kwe-500% ne-1000% yamandla okusebenza ngokuzimisa. Izinhlangano zokuthuluzwa kwezinhlayiya (MCCBs) ziyafunekile kunezinhlangano zokuthuluzwa zezinhlayiya ngokuzimisa ngoba zibhekiswe ukuze zibuyiselwe emva kokuphakama, okuvumela ukuthi zibe yizinhlangano ezinokusebenziswa kabusha. Izinhlangano zibiza ukuthi kubonakala ukuthi kubuyiselwa isilinganiso sokuthi $18,000 kubuyiselwa kwezinkokhelo zokulungisa ngokuphakama kwezinkokhelo zokulungisa. Ukuthuthukisa lezi zinhlangano kungasiza ekuthuthukiseni kwezinhlangano zokusebenzisa futhi ukungavikela ukuthi kubulawa kwezinye izinhlangano, njengokubulawa okwenzeka uma kubulawa kwezinhlayiya zokuthuluzwa.

Ukhuseleko lwesinhlangano zokuthuluzwa kwezinhlayiya (MCCB) olufanele kubuyekezwa ngokuchangeza kwezinhlayiya zokusebenza

Izilungiselelo zokugcina izindlela zokusebenza ngokwezinye zikhindela ukuthi isikhundla sesithembiso sishwe kusukela kubukhwekwe bokusebenza kwemotolo, amaqhuba okufaka umoya, nokuguqula kwe-HVAC

Kwimisebenzi yasezindustria, izimali zingahamba ngokuphelele futhi i-MCCBs ziyiphendula lo mlando ngokusebenzisa izilungiselelo zokuthembisa okuzokubhekana nezinhlobo zokuthembisa. Abasebenzi bangalungiselela izinhlobo zokuphendula ukuze bakholelele amaqhuba okuhambisana, kodwa baphinde baphephele. Isibonelo:

Izilungiselelo zokuthembisa zihlala zisikhundla xa izicompressor ze-HVAC ziguqula

Izilungiselelo zokuthembisa zihlanganiswe ukuze bazikholelele amaqhuba okufaka umoya kwemotolo emizini ya-8 ku-12

Lo mlando wokulungiselela wabangela ukuthi kukhishwe ukungasebenzi ngokuphelele ngokulingana ne-47% uma kuchazwa kwi-mccbs ozikhundla zokuthembisa ezifixed kwi-izindawo zokwenza izinto.

Xa kuchazwa ukuthi kuyisibonelo sokulungiselela, i-MCCBs zinakha ukuthi izikhundla zezinye zihlale zizikhundla futhi kuphela izikhundla zezinye zokugcina zithembisa.

Ama-MCCB aqinisekisa ukuhlanganiswa okukhethiwe ngokwenza ngezifiso imivimbo yesikhathi samanje yama-breaker aphezulu naphansi. Sigwema ukucishwa kukagesi okuqhubekayo kuyo yonke imigqa yokukhiqiza njengoba isiphazamisi sesifunda esiyinhloko sivala ngemizuzwana engaphansi kuka-0.03 ukuze sivule isiphazamisi esisezansi. Izici ezibalulekile yilezi:

Amakamelo ezinsiza nezinye izinto ezibalulekile angaqhubeka nokusebenza ngisho nalapho kunesiphazamiso phansi

Ukuhlukanisa amaphutha kunciphisa isikhathi esivamile sokuthola iphutha ngo-68%

Amandla akhishwa kuphela esifundeni lapho kunesici, okunciphisa ingozi yokuduma kwe-arc.

Izinhlelo ezihlanganiswe kahle ziqinisekisa amandla ngesikhathi sephutha kuma-95% wemishini esekethe [NFPA 70E 2023].

Ukuhlanganiswa nokuhambisana ne-MCCB ku-Industrial Low-Voltage Switchgear

Ukuphepha kwemvelo nokuqina emhlabathini wokuhlola indawo yokusebenza okuqhubekayo IL MCCB isiphazamisi esizenzakalelayo se-UL 489 ne-IEC 60947- 2

Emizinhleleni yemithombo, izibhokisi zokuvimbela zemoto (MCCBs) kufanele zibe nesicelo se-UL 489 ne-IEC 60947-2 ukuze zihlale kubhekisekile nokusebenza ngokuphelele. Lezi zinhlelo zidinga izibhokisi zokuvimbela zemoto (MCCBs) zokwenziwa ukusebenza ngokuphelele ngokuphakeme kwezinhlelo zokusebenza. Lezi zinhlelo zidinga izibhokisi zokuvimbela zemoto (MCCBs) zokwenziwa ukusebenza ngokuphelele ngokuphakeme kwezinhlelo zokusebenza. Kulezi zinhlelo, abahleli bakhelwa izibhokisi zokuvimbela zemoto (MCCBs) ukusebenza ngokuphelele ngokuphakeme kwezinhlelo zokusebenza. Lokhu kwenziwa ngokwenza izivivinyo sezintambo zokugcina ukuthi kuzoba kunezinhlelo zokusebenza eziningi kune-6000. Ukuze zilindele izimo ezingavumelekile emshini wokwenziwa, abahleli bezibhokisi zokuvimbela zemoto (MCCBs) bavivinywa ngokudla, ukuchitha, nokuvibratha izibhokisi zokuvimbela zemoto (MCCBs) ukuze bafanise izimo zokusebenza kwisikhumba sokwenziwa. Ukusebenza kwezimo ezingaphakeme kwezinhlelo zokusebenza kuyadingeka ngokushesha, nokuthi ukusebenza okuphelele kufanele kuhlanganise kwi-25°C futhi kwi+70°C. Ukubhekisekile kwezinhlelo zokuxhumana nokuphelele kuyisidingo esifanayo. Ngokubhekisekile kwezinhlelo zokuxhumana nokuphelele ze-IEC TR 61912-2, izibhokisi zokuvimbela zemoto (MCCBs) kufanele bavimbise isikhathi sokungena kwezinto ezingavumelekile ngaphakathi kwe-3 ku-8 milliseconds uma kubhekisa isikhathi sokuvimbela kwezinto ezingavumelekile.

Ukuqiniseka konke lokhu kubonakala ukuthi i-MCCBs kungaqhubeka ngemiphumela yezindawo zokusebenza, njengokugcina kwamaphutha okuphatha umoya nokubhekwa kwezinkimba zokuhlanganisa ezihlukahlukene, ngaphandle kokuvula isistimu yokulondoloza okuyilondoloza izinkampani.

Ukufaka i-MCCB ngokwemvelo kwezindawo zokusakaza amandla kwezindawo zokusebenza

Amcimbi wezinyathelo zokuvula (MCCBs) ayizihlukaniswa futhi asebenza kahle kwezindawo ezithile, ngokuvikela izinhlangano zezimali zemithambo, futhi ngokuba isistimu sibuyela ukuzweleka, ukugcina konke amasistimu akhuselekile. Sebenzisa kwezinyathelo zokuvula zomkhakha wokuqala okuqukethwe kwe-100 ku-2,500 amaphezi njengoba nezinyathelo zokuvula ezinamandla amaningi, lapho izinyathelo zokuvula ezingaphansi azisiza kakhulu. Isici esisodwa kwazo kukuthi kusetyenziswa i-DIN rail mounting option, okunika umlando wokufaka kwezinyathelo zokuvula emaphaneleni okuvikela imotolo futhi kwezinyathelo zokuvula. Lezi MCCBs ziyafiswa kakhulu njengoba kumathuba amabili, konke kubhodi yezindawo kuyisisekelo esibalulekile. Lokhu kwenziwa ngokuphatha kwezimali zokuvikela nokuphatha kwezimali zokuvikela, futhi ngokwesilinganiso sokungavumelekile, kuphela amcimbi amakhulu ayo ayo abe yizinyathelo zokuvula ezivikela izindawo eziphambili, ngakho-ke izinyathelo zokuvula ezingaphansi ziyavikela izinyathelo zokuvula ezingaphansi ngokwesibonelo. Ukunciphisa izindleko ngokukhupha ukungasebenzi kusobala kahle, okubonisa ubuhle bezindleko zezimali zokuvikela ezisondelwe kwezimali zokuvikela zezimali zokuvikela (MSSs), okunika abasayensi ama-740k ngonyaka, ngokwesifundo saseyile ya-Ponemon Institute. Izinkimbinkimbi ezintsha ziyashicile ukujabulisa ukubona ukusetshenziswa kwamandla ngamathekisi, futhi ukusetshenziswa kwamandla okungafanele, kabefore ukungavumelekile.

Ama-MCCB athuthukile ukuze asize ekuphatheni kahle amanethiwekhi kagesi, kunokuba asetshenziswe njengama-switch okuphepha. Ukusebenzisa la mathuluzi ezindaweni ezihlukahlukene zesakhiwo se-grid yokusebenza kwesistimu kuzovumela uhlelo ukuba luvumelane nezingcindezi eziningi zokusebenza ezitholakala emikhakheni yezimboni njengokuqalisa okungazelelwe kwezimoto, ukushisela, nokuvula imijikelezo kumayunithi e-HVAC. Ubuchwepheshe obudala abukwazi ukuzivumelanisa nalezi zinguquko njengoba kunjalo ngama-MCCB.

Imibuzo Evame Ukubuzwa

Yiziphi izinzuzo zama-MCCB ekusetshenzisweni kwezimboni?

Ama-MCCB anezinhlanganisela zezinzuzo ezifana namandla aphezulu okuphuka / okuthwala, ukuqhuma kwe-thermal-magnetic (okusetshenziswa kabusha) ukuvikela, ukuvikelwa okuzivumelanisa nezimo ngezilungiselelo ezilungisekayo zokuvikela, ukuhlukaniswa kwephutha ngokuxhumana okukhethiwe, namazinga

Ama-MCCB angalinciphisa kanjani inkinga yokucasuka okucasulayo?

Am-MCCB angakwakha ukuthi kubhekwe ngokungafanele ngokusebenzisa izimpendulo ezinokuguqulwa okuzosiza ukuthi zilinde amaphuleli athile njengezimpendulo zemotolo noma zokufaka umsindo, ngakho kuyasebenza ukuthi kubhekwe ngokungafanele kodwa kuyasebenza ukuthi kubhekwe ngokungafanele kwezinkinga.

Kufanele am-MCCB abe nenkulumo yani ngokuphatha kwezinhlanganiso nezinciko ukuze bavusekwe emizini?

Am-MCCB kufanele babe nenkulumo ye-IEC 60947-2 ne-UL 489 ukuze kubonwe ukuthi am-MCCB ayisisekelo sezinhlanganiso zokusebenza a) ngokuphathelana ngokuphelele emizini yokusebenza futhi b) ukuthi am-MCCB ayisisekelo sezinhlanganiso ozokufanele kuzo emizini yokusebenza yemizini.

Ngtona indlela am-MCCB ayisiza ukuthi kwenziwe ubuncinane bekungasebenzi?

Am-MCCB ayisiza ukuthi kwenziwe ubuncinane bekungasebenzi ngokuhlanganisa ngokukhethekile okuyisula kuphela isiqondiso esihlukene sesikhala futhi sibeka isikhala esisodwa phambili ngokuphatha ngokushesha kokubhekwa kwesinkinga.