Ingabe Izivikeli Zokukhuphuka Zivimbela Imililo?
Ngicishe ngalahlekelwa yigumbi leseva ngenxa yekhebula elilodwa elibi. Lelo phunga lepulasitiki elivuthayo ngo-2 ekuseni lisangivusa.
Yebo, izivikelo zokushisa zingavimba imililo eminingi kagesi. Zivimba ukujiya kwamandla kagesi okungazelelwe okuncibilikisa izintambo futhi kuthungele ipulasitiki eseduze. Aziphelele, kodwa zinciphisa ingozi yomlilo ngamaphesenti afinyelela ku-70 ekuhlolweni kwami kwemboni.
Qhubeka ufunda futhi ngizokukhombisa ngqo ukuthi zisebenza kanjani, ukuthi zehluleka kuphi, nokuthi ngenzenjani ukuze ngigcine amakhasimende ami ephephile.
Asebenza Kanjani Amadivayisi Okuvikela Ukuqhuma? Ingabe Angawumisa Ngempela Umlilo?
Ngisebenzisa isitshalo sokuvikela ukukhuphuka kwamandla kagesi eWenzhou. Sihlola nsuku zonke. Idivayisi enhle inciphisa i-spike engu-6 000 V iye ku-330 V ngaphansi kwesekhondi elilodwa. Leyo clip esheshayo ivimba izintambo ekushiseni ngokweqile nasekuqaleni umlilo.
Ngaphakathi kwe-Metal-Oxide Varistor (MOV)
I-MOV iyidiski encane ye-ceramic. Ihlala phakathi kwentambo ebukhoma nentambo engathathi hlangothi. Ku-230 V evamile ayenzi lutho. Lapho kufika i-spike, ukumelana kwe-MOV kwehla cishe kube yi-zero. Amandla engeziwe ageleza entanjeni engathathi hlangothi futhi kude nomthwalo. Ukushisa kuncane futhi i-MOV iyaphola futhi.
| Ingxenye | Umsebenzi | Impilo Ejwayelekile |
| I-MOV | Sika i-spike | Imicimbi engu-5 000 |
| I-fuse yokushisa | Vula uma i-MOV ishisa | Isikhathi esisodwa |
| Ipayipi legesi | Phatha umbani omkhulu | Imicimbi eyi-100 |
Ukuhlolwa Komlilo Wangempela Elabhorethri Lami
Sithathe izinti ezimbili zamandla. Esinye sasino-MOV, esinye sasingenayo. Safaka i-spike engu-4 000 V izikhathi eziyi-100. Isinti esingenayo i-MOV safika ku-180 °C futhi ipulasitiki yaqala ukuncibilika. Isinti esine-MOV sahlala ku-35 °C. Isithombe esingezansi sibonisa isinti esincibilikile. Akukho langabi elivele, kodwa ingozi yayisobala.
Kungani Kusaqhubeka Imililo Eminye
I-MOV ingahluleka ukujikeleza okufushane. Uma i-fuse yokushisa ingekho, i-MOV iyaqhubeka nokushisa. Sifaka i-fuse yesibili kanye nendlu engashi. Yingakho isitshalo sethu saseWenzhou sisebenzisa ipulasitiki ye-UL 94 V-0. Imisa ilangabi ngaphansi kwemizuzwana eyi-10.
Iyini isixhumanisi phakathi kokuqhuma kwamandla kagesi kanye nemililo?
Ngibone imbobo engu-1 cm ishiswa kwi-PCB ngemva kokuqhuma okubi kanye. I-spike ithole umkhondo obuthakathaka futhi yawuguqula waba yindawo eshisayo engu-300 °C. Leyo ndawo yakhanyisa ibhokisi lepulasitiki.
Lapho Ukushisa Kuvela Khona
Intambo iyi-resistor. Uma i-voltage iphindaphindwa kabili, amandla akhuphuka kane. I-trace encane ku-PCB eshibhile ingasebenza njenge-fuse. Iyakhanya ebomvu bese ishisa ibhodi. Ithebula libonisa izibalo.
| I-Voltage(V) | I-Powerin1Ωtrace(W) | I-Temprisein1s(°C) |
| 230 | 52 900 | 120 |
| 1 000 | 1 000 000 | 2 300 |
Indaba Yangempela Evela Kumthengi WaseJalimane
Umakhi wephaneli eMunich uthenge imichilo eshibhile kumthengisi ongaziwa. Isiphepho sasehlobo sashaya. Ukuqhuma kwathola umkhondo ongu-0.5 mm ebhodini lokudlulisa. Ibhodi lasha kwathi lonke iphaneli kwadingeka lishintshwe. Umlilo wababiza u-80 000 €. Ngemva kwalokho bathenga imichilo ene-UL 1449 4th edition kuphela. Manje sithumela izingcezu ezingu-2 000 kubo njalo ngenyanga.
Kungani Umlilo Uvame Ukuqala Ngaphakathi Kwedivayisi
Ikhebula langaphandle libukeka lihle. Umonakalo ufihliwe kwi-PCB. Yingakho ngicela amakhasimende ami ukuthi ahlole i-voltage ye-let-through. Sibanika umbiko wokuhlola wamahhala nge-batch ngayinye. Uma i-let-through ingaphezu kuka-400 V, siyayenqaba i-batch.
Amadivayisi Okuvikela Ukukhuphuka Asiza Kanjani Ukuvimbela Imililo?
Ngifaka izendlalelo ezintathu emikhiqizweni yami: i-MOV ukuze ikliphulwe, i-fuse ukuze inqunywe, kanye ne-V-0 housing ukuze igcinwe. Lokhu kuthathu kunciphisa ingozi yomlilo ngo-70% ocwaningweni lwethu lwango-2023 kuzo zonke izikebhe eziyi-1 200 e-Italy.
Isendlalelo 1 - Sika i-Spike
Sikhetha amadiski e-MOV angu-14 mm ububanzi. Angathatha ama-6 500 A nge-shot eyodwa. Idiski enkulu isakaza ukushisa. Lokho kugcina izinga lokushisa lingaphansi kwama-80 °C ngisho nangemva kokushaya okungu-3 kA.
Isendlalelo 2 - Sika Amandla
Sifaka i-fuse yokushisa eduze kwe-MOV. Uma i-MOV ishisa ku-115 °C, i-fuse ivuleka ngemizuzwana engama-30. Amandla ayaphela futhi uchungechunge lomlilo luyama. I-fuse isebenza kanye kuphela, kodwa isindisa isakhiwo.
Isigaba 3 - Vimbela Ilangabi
Ikesi liyipulasitiki ye-UL 94 V-0. Siphinde sengeze isivikelo sensimbi esingu-1 mm nxazonke ze-MOV. Ekuhlolweni kwethu kwegumbi lokusha, ilangabi liyafa ngemizuzwana engu-8. Akukho pulasitiki ewayo, akukho ukusabalala.
| I-TestItem | Umphumela | Umkhawulo we-UL1449 |
| Isikhathi selangabi | 8 imizuzwana | ≤ 60 imizuzwana |
| Ukuhlolwa kokulahla | Awekho amaconsi | Amaconsi angu-0 |
| Vumela kudlule | 330V | ≤ 400V |
Ubufakazi Bensimu obuvela eFrance
Isikhungo sedatha eduze kwaseParis sifake ama-rack bars ethu angu-800. Ibha eyodwa yashaya ngamandla angu-6 kA. Ibha yavala, i-fuse yavuleka, futhi i-rack yaqhubeka isebenza nge-bypass. Akukho mlilo, akukho sikhathi sokungasebenzi. Umphathi wesayithi ungithumelele isithombe sebha eshile kanye nencwadi yokubonga. Leso sithombe manje sisewebhusayithi yethu.
Yiziphi Izimo Zomlilo Ezingavinjelwa Amadivayisi Okuvikela Ukwanda?
Ngitshela wonke umthengi iqiniso: idivayisi yami imisa ama-spikes, hhayi ama-short circuits. Uma ucingo oluxegayo luthinta ikesi, i-surge bar ngeke isize. Usadinga i-breaker kanye ne-wiring enhle.
Imililo Egcwele Umthwalo Ongaphezulu
I-heater idonsa u-15 A ku-strip engu-10 A. Ithusi elingaphakathi liyashisa ku-150 °C. Akukho spike ekhona, ngakho-ke i-MOV ayisebenzi. I-breaker kuphela engakusindisa. Ngiphrinta isilinganiso se-amp ngokugqamile ebhokisini ngalinye.
Imililo Emibi Yokuxhuma Izintambo
Izakhiwo ezindala zinezintambo ezingu-0.75 mm². I-screw terminal iyakhululeka ngokuhamba kwesikhathi. Isikhala siyashisa futhi siqhumise. Lokho kushisa kuqala umlilo ngaphakathi kodonga. Ibha yokungena ngaphandle kodonga ayikwazi ukukuzwa. Ngiyeluleka amakhasimende ami ukuthi afake ama-arc-fault breakers kuphaneli.
Ukushaya Okuqondile Kombani
Ukushaya okuqondile okungu-200 kA ophahleni kuzoncibilikisa noma iyiphi i-MOV. Ibha iba ibhola lomlilo. Yingakho sengeza induku yombani yekilasi I emnyango wenkonzo. Induku ithola ukushaywa okukhulu kanti ibha ibona kuphela okusele okungu-10%. Ngithengisa yomibili imikhiqizo futhi ngihlala ngiyibhangqa.
Isiphetho
Ibha yokudonsa enhle inqamula i-spike, inciphise ukushisa, futhi igcine ilangabi ebhokisini. Kuyisiqinisekiso esishibhile ngokumelene nemililo eminingi, kodwa akuyona imilingo. Yisebenzise ngama-breaker, ucingo oluhle, kanye nenduku yombani, futhi ama-rack akho azohlala epholile ngisho nangobusuku besiphepho esibi kakhulu.