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Imisebenzi Eyisisekelo Yokuvikela I-MCCB Umkhawulo Wokuqalisa
Isikhiphi sesekethe esenziwe ngesimo mccb i-IEC 60947-2 ivikela amasekethe ngokumelene namaphutha amabili. Ukuvikelwa kokugcwala ngokweqile kuphendula ekushiseni ngokweqile okuqhubekayo kusetshenziswa ibhande le-bimetallic elifudumala futhi lihambe ngesimo esiphambene nesikhathi. Ukuvikelwa kwesekethe elifushane kuphendula emithonjeni yephutha ephindwe izikhathi ezingu-5 kuya kwezingu-10 ngaphakathi kwe-millisecond nge-electromagnetic solenoid. Le ndlela yokushisa enamandla kazibuthe iyisisekelo. Ayisebenzisi ukuvikela ukuvuza komhlaba, i-undervoltage, ukulahleka kwesigaba, noma imiyalo ekude edinga amamojula angeziwe.
Ukuphakama kakhulu, Ukugxila Kwesikhathi Esifanayo, Nokuthiwa Kwesikhathi Sokuphakama Kwezinhlobo Zokuthiwa
Isihloko sesandla mccb isandla sokuthiwa sokuphakama kwezinhlobo zokuthiwa sisebenza ngamabili. Isandla sokuphakama — isithuthi esinezinkambo ezimbili esiphakamiswa ngokwesikhathi sokufaka — siphakama ngokuphakamisa I²t, sibonisa ukuphakama kwesandla. Ngokwesikhathi sokuphakama kwe-1.45× sokubhalwe, isandla sokuthiwa kufanele sithiwe ngaphansi kwesikhathi sesihour ngokwesandla sokuthiwa se-IEC 60947-2. Isandla sokuthiwa sokuphakama sithiwa ngokusho (ngaphansi kwemilisekondi eyi-20) lapho isikhathi sokufaka siphakama kude kwezinhlobo zokuthiwa. Lokho okungasebenzi: ukubona ukuphakama kwe-30 mA, ukuthiwa ngokuphakama kwevoltage ngaphansi kwe-70%, noma ukuphendula isignal yesandla sokuthiwa se-BMS.
Isimo Sesikhathi Sokuzo — Isikhathi Sokuzo Sisindela Ukuthiwa Kwesikhathi Sokuzo Kwesandla Sokuzo Kwesandla Sokuzo
Isikhathi sokuzo esincane sekholi yezinto eziphakathi emasipaleni ase-Europe yaMasharli sibona ukuthiwa kwesikhathi sokuzo kwezinye izinhlobo zokuzo mccb izinyanga ezingaphezu kweziyisithupha. Uphenyo lwathola ukuthi lolu daba lwalubangelwa ukuvuza komhlaba okuqoqiwe ukuvuza komshini ngamunye okungu-8 kuya ku-15 mA emishinini engu-40 ehlanganiswe yaba ngu-400+ mA, okwenyuka ngaphezu komkhawulo ongu-500 mA wesikhwama sesikhwama se-incomer ngesikhathi sesimo sezulu Isixazululo, esakhiwe ne-HONGXINAIOT (Xiamen Hongxin Intelligent Technology), ibhizinisi lobuchwepheshe obuphezulu elineminyaka engu-24 yesipiliyoni sokusabalalisa ugesi mccb amayunithi anezimodyuli zokuvuza komhlaba ezisethiwe ku-100 mA ngegatsha ngalinye. Ukuhamba okubangela ukucasuka kwaphela. Ukuqapha emagatsheni kwenza amaqembu okugcina izinto zisesimweni esihle akwazi ukubona ukuvuza okukhulu ngaphambi kokuba kuqale ukuguqula ukuphazamiseka kube ukugcinwa okuhleliwe.
Amamojula Wokuvikela Engeza Okhulisa Amandla E-MCCB
I-Shunt Trip, Ukukhululwa Kwe-Undervoltage, I-Earth-Leakage Module, Nokuvikelwa Kwezimoto
Umthombo wokudla wokusha mccb iyathola amaqembu amane wezinkokhelo zokugcinwa ezinguqukileyo ngaphandle kokubuyisela isikhundla sokuvula. Isikhundla sokuvula esihlanganisiweyo — esibhekiswe ngomkhawulo wokuvula kusuka kwezinkampani zokuphatha ukuphuma kwemifula, isithonjana sokuvula kusuka kwezinkampani zokuphatha ukuphuma kwemifula, noma isikhundla sokuvula kusuka kwe-BMS — sivula isikhundla sokuvula ngendlela engafihli ngaphandle kwe-50 ms emva kokuthola umkhawulo. Isikhundla sokuvula ngokungabi nesifunda (UVR) sivula isikhundla sokuvula lapho umkhawulo wokufaka ungafihli kusukela ku-70% ku-35% kwe-nominal futhi lisikhuba ukubuyisela kusukela kwe-85%, lokhu lisigcina amamotori ukuzwakala futhi ukubuyisela ngaphansi kwezinhlobo zokusebenza. Isikhundla sokuvula ngokungabi nesifunda kwezinye izindawo (earth-leakage module) nge-CBCT eyangaphandle iyathola umkhawulo wokungabi nesifunda ngapansi kwe-30 mA ukucinca abantu noma ngapansi kwe-100 mA ku-30 A ukucinca izinkampani, lokhu lisengeza isikhundla sokuvula ngokungabi nesifunda kwisekhundla sokuvula esisodwa. Isikhundla sokucinca amamotori lisengeza ukuthola ukungabi nesifunda kwezinhlobo zokusebenza nokungabi nesifunda kwezinhlobo zokusebenza — okuyisisekelo sokuthola ukungabi nesifunda kwezinhlobo zokusebenza eziyisikhombisa ukuthi amamotori ayizwakala ngaphansi kwezinhlobo zokusebenza.
Amathuluzi Eshishini Sokuvula — Ukuthenga Kwezinkokhelo Nokuxhumana
Amakuruvu Okukhula Okunokuguqulwa, Ukugcina Amadatha, nokuhlanganiswa kwe-Modbus/Fieldbus
Ithrip yamaphethini yendlela yokubeka isikhathi esifixed sokuqondisa okwesibonelo kusuka ku- mccb nokuthi yisikhathi sokuphatha ngomkhombisi wokuphatha amandla. Amaph advantages ayisithathu. Amakuruvu okukhula okunokuguqulwa — ukuphatha kwesikhathi esidala kusuka ku-0.4 ku-1.0× kwezinhloko zokuphatha, ukuphatha kwesikhathi esinye kusuka ku-1.5 ku-10×, ukuphatha kwezikhathi eziningi kusuka ku-2 ku-15× — kunceda ukuphatha kwezinhloko zokuphatha kuzo zonke izindawo zokuphatha ngaphandle kokuguqula izinto ezinamandla. Ukugcina amadatha — ithrip yamaphethini igcina ubukhulu nokusaga kwesikhathi sokugcina kwezinkambo eziyisihlanu ku-10 zokuphatha, kufaka ukubhalwa kwamandla okwesikhathi esinye, nokuthi yiliphi iphase yamandla, nokuthi yiliphi uhlobo lokuphatha (ukuphatha kakhulu, ukuphatha kwezinhloko, ukuphatha kwezinye) — kunceda ukuvavanya ukuthi yiliphi indlela yokuphatha emva kokuphatha. Ukuxhumana — izikhathi zokuxhumana zesi-Modbus RTU, Modbus TCP, noma Profibus — kuhlanganisa izinhloko zokuphatha kwi-SCADA yekhaya okanye kwisevisi yokuqondisa amandla ukukhombisa amandla okwesikhathi esinye, ukubhalwa kwamandla, nokuthi ukuphatha ngaphandle kwesikhathi esinye/ukuthi ukuphatha ngaphandle kwesikhathi esinye. I mccb nge-electronic trip unit kanye ne-communication module iba inzwa yekhwalithi yamandla, hhayi nje umshini wokuvikela.
Isiqondiso Sokumiswa Kwe-MCCB Esikhethekile Esiqondiswe Esicelweni
Izakhiwo Zezentengiselwano, Ukulawulwa Kwezimoto Ezimbonini, Nezinhlelo Zamandla Avuselelekayo
Ukuthengiswa kwezakhiwo zezentengiselwano a mccb ukuvikela ibhodi lokuhlukanisa ukudla, ukukhanyisa kanye nemigqa yesokhethi inenzuzo ye-earth-leakage module ehlelwe ku-300 mA yokuvikela umlilo ngokwe-IEC 60364. Ukulawula imoto yezimboni isiphazamisi esondla imoto yepompo engu-30 kW sidinga imodyuli yokuvikela imoto enokuhlonza ukulahleka kwesigaba nokukhululwa kwevolthi ephansi ukuvimbela ukuqala kabusha okuzenzakalelayo ngemuva kokuvalwa. Izinhlelo zamandla avuselelekayo amabhokisi okuhlanganisa i-AC inverter solar adinga iziphazamisi ezihloselwe ukugeleza kwamanje kokubili nokushisa okuphezulu kwe-ambient (50 °C kuya ku-60 °C ngaphakathi kwesakhiwo se-inverter) nge-derating efanele. I-HONGXINAIOT inikeza izixazululo ezenziwe ngezifiso zokuhlukanisa amandla kuhlanganise mccb izinkundla nezindlela zokufaka izithuthukisi ezihambisana nezinhloso — kuzo zonke izwe ngezinhloso zezifundo zezinye izindawo.
Imibuzo Evame Ukubuzwa
Ingakwazi ukubona ukuphuma kwamandla kwe-MCCB?
Isahluko esisodwa mccb akaboni ukuphuma kwamandla. Ukufaka isahluko sokuphuma kwamandla nesikhombisa sesikhathi sokubaluleka sokugcina amandla sokuqondwa kusuka ku-30 mA ukuze kube 30 A, kusukela kulesikhombisa esikhethiwe. i-HONGXINAIOT isinika izithuthukisi ezihambisana.
Ukuchanya phakathi kwe-shunt trip kunye ne-undervoltage release kukuphi?
I-shunt trip e-MCCB mccb iyathatha isibindi xa iphumelela isignal yamandla esigqibeleni — isetshenziselwa ekugcineni kwezinye izinto zokuphila nokuthintela okungcono. I-undervoltage release iyathatha isibindi xa amandla ayaphela futhi ayavikela ukubuyisela kusukela emva kokubuyisa amandla — isetshenziselwa ekuvikeleni kwezimotolo.
Ingakwazi ukuxhumana i-MCCB ne-building management system?
Yebo. I mccb ngokusebenzisa i-trip unit yamandla ne-modbus RTU/TCP noma i-modbus Profibus, isishwana sesikhathi samandla, i-voltage, i-power, kunye ne-data yezinkinga kufakwa kwi-BMS noma kwi-SCADA system ukusukuma ukubonwa kwekhanda kanye nokuphatha kwamandla.
Kuzodingeka ukuthi kwenziwe nini ukuthinteka okudala kwe-motor circuit MCCB?
I-motor circuit mccb kufanele ibe ne-phase-loss kunye ne-phase-unbalance detection, i-undervoltage release ukukhindela ukubuyisela kwe-brownout, kanye nokukhetha i-earth-leakage module. I-standard thermal-magnetic trip unit ngokwesibonelo akasikwazi ukuthinteka kwe-motor.
Ukuthinteka kwe-multiple MCCBs kuchazwa njani?
Ukuthinteka phakathi kwe- mccb i-units kusebenzisa i-time-current curve analysis — i-downstream breaker kufanele ikhishone kabefore i-upstream breaker ngokwesinye isikhathi sokulinga esihlukene ngaphakathi kwebhlokhi yakho. I-electronic trip units ene-curves ezinokuguqulwa zinconywa ukuthinteka ngaphandle kokuguqula izinto zokusebenza.
Ngakwenzeka noma-ke i-MCCB ekhasimende yesolar PV system?
Yebo. I mccb kubanqandu lwe-solar PV AC yokuqondana kufanele kube nesivumelwano sokugcina amandla okukhanya, kubanqandu lwe-50°C ku-60°C lezinsizakwane zokuphakamisa ngaphakathi kwesibhalo, futhi kufanele kubhekwe ukuthi kubonakala ngokwesivumelwano sokugcina amandla okukhanya xa kusetshenziswa ngaphansi kwesivumelwano sokugcina amandla okukhanya. HONGXINAIOT inawabika iziphakamiso zezinhlobo zezinkundla zokusebenza.