I-Metal-Clad vs. I-Metal-Enclosed Switchgear: Umehluko Oyinhloko kanye Nemibandela Yokukhetha
I-Metal-clad switchgear iyindlela echazwe ngokucacile ye-switchgear evalwe ngensimbi, hhayi okuphambene nayo. Kumatemu e-IEEE, ukuhlangana okugqoke insimbi kunekhompathimenti ethile kanye nezinhlelo zokuthibela futhi kusebenzisa ama-breaker circuit asebenza ngogesi. I-Metal-enclosed ichaza umndeni obanzi; izidingo eziqondile zincike ezingeni lempahla kanye namadivayisi angaphakathi kwendawo ebiyelwe. Ikhabethe lensimbi elinezicabha aligqoki ngensimbi ngokuzenzakalelayo.
Kunjiniyela wephrojekthi oqhathanisa i-metal-clad vs. metal-enclosed switchgear, imibuzo ewusizo yilena: Yiliphi izinga elisebenzayo? Yini ephazamisa futhi ehlukanise isekethe? Ahlukaniswa kanjani amabhasi amakhulu, ukuxhunywa kwekhebula nezinsimbi? Ikuphi ukufinyelela kwesondlo okudingekayo? Futhi ingabe amarekhodi okuhlola afana nempahla e-odiwe? Le mibuzo ithembeke kakhulu kunokukhetha ngokubukeka kwekhabethe noma ilebula yomkhiqizo womphakeli.
Uyini Umehluko Phakathi Kwe-Metal-Clad ne-Metal-Enclosed Switchgear?
Insimbi-evaliwe kusho ukuthi izinto zikagesi zifakwa endaweni ebiyelwe yinsimbi. Kuyincazelo ebanzi, futhi izidingo ezinemininingwane zivela ezingeni elisebenzayo lemishini. Imihlangano eneziphazamisi zokushintsha, amafuse, amadivaysi angaguquki noma ama-circuit breaker angavalwa ngensimbi. Ezinye zihlukaniswe zaba izingxenye eziningana; abanye banezinhlelo ezahlukene zangaphakathi.
Izigqoko zensimbi , ngaphansi kwe-IEEE C37.20.2-2025, iwukwakhiwa kwe-medium-voltage ethile. Ububanzi obushicilelwe bezinga buchaza ama-breaker circuit asebenza ngogesi namakhompathimenti ahlukanisa izingxenye eziyinhloko njengebhasi elikhulu, uxhumo olungenayo naphumayo, kanye nezinsimbi ngezithiyo zensimbi ezisekelwe phansi. Izidingo eziphelele zinemininingwane eminingi kunale ncazelo emfushane; isimangalo esifanele kufanele sibhekisele kumhlangano othize kanye nohlelo lwezinga.
Lo mehluko ubalulekile ngoba ilebula ebanzi “yemishini yokushintsha insimbi evaliwe” iyodwa ayikwazi ukutshela umthengi ukuthi i-breaker iyakhishwa, noma amakhompathimenti anezinsimbi ezihlukene ezihlukene noma yiziphi izindawo zokulungisa ezihlinzekwayo. Futhi ayibonisi ukuthobela ukuhlukaniswa kwe-arc yangaphakathi.
| Ukuqhathanisa | Ukwakhiwa kwensimbi ye-IEEE | Imishini evalwe ngensimbi ngobubanzi |
|---|---|---|
| Amagama | Umhlangano ochazwe ngokuqondile ngaphansi kwe-IEEE C37.20.2. | Umndeni obiyelwe ngensimbi obanzi; nquma isigaba esiqondile semishini kanye nezinga elilawulayo. |
| Idivayisi yokushintsha enkulu | I-Drawout i-circuit breaker esebenza ngogesi njengoba kuchazwe kububanzi be-IEEE metal-clad. | Ingafaka amaswishi okuphazamisa, amafuse, ama-circuit breaker noma amanye amadivaysi afanele izinga. |
| Ukuhlukaniswa kwesekethe okuyisisekelo | Ukuhlukaniswa kwensimbi okusekelwe phansi okuchazweyo kwama-elementi ayinhloko ayinhloko. | Ukwakhiwa kwegumbi kuyahlukahluka; eminye imihlangano evalwe ngensimbi nayo inokwehlukana okubanzi. |
| Indlela yesevisi | Izikhundla zedivayisi yokudonsa kanye nokukhiya okuhlobene kuyizici ezibalulekile zedizayini. | Kuncike kumadivayisi angaguquki noma akhiphekayo, ukuhlelwa kokuhlukaniswa nomklamo wokufinyelela. |
| Okufakazelwa ilebula | Kuphela njengoba umhlangano obhaliwe kanye nezinga lawo elifunwayo lisekela ngempela. | Indawo ebiyelwe iyodwa ayitholi uhlobo lwe-breaker noma ukusebenza kwe-arc okuhloliwe. |
Ama-Compartments, Izithiyo kanye Namalungiselelo Okuphula Isekethe
Kungani ukuhlukaniswa kungaphezu kwemininingwane yesakhiwo sekhabhinethi
Ibha yebhasi, i-circuit breaker kanye nokunqanyulwa kwekhebula kunemisebenzi ehlukene kanye nezidingo zokuhlola. Izithiyo zensimbi ezisekelwe phansi phakathi kwezingxenye zesekhethi ezinkulu zingachaza imingcele yokufinyelela futhi zinciphise ukuchayeka ngengozi ezingxenyeni eziyinhloko ezingahlobene bukhoma phakathi nezinqubo ezigunyaziwe. Kodwa-ke, isithiyo asithathi indawo yokuhlukaniswa, ukuqinisekiswa kokungabikho kwamandla kagesi noma imithetho yokuphepha kagesi yesayithi.
Umthengi kufanele acele umdwebo wekhompathimenti wangempela, anganciki esithombeni seminyango yangaphambili. Buza ukuthi ibhasi elikhulu ligijima kuphi, lapho izintambo zinqamula khona, lapho iziguquli zezinsimbi zimi kuphi nokuthi indawo yokulawula ihlukaniswa kanjani. Cacisa ukuthi kwenzekani lapho umnyango wokungena uvulwa nokuthi yiziphi izingxenye okufanele zenziwe ziphephe kuqala.
Ama-Drawout breakers ngokumelene namadivayisi ashintshayo angashintshi
Isinqamuli sokudonsa sisebenzisa indlela ekhethiwe ukuhamba phakathi kwezindawo ezivunyelwe ukwakheka kwaso. Ukuhlukaniswa okuyisisekelo okufanele, ukuxhumana kwesibili nokuziphatha okuxhumene kuncike ekuhlanganiseni okuqondile. Iswishi yesiphazamisi esingaguquki noma isiphazamisi sesekethe esingaguquki singadinga ukulungiswa okuhlukile nokunqanyulwa kwenqubo. Akukho nokukodwa ukucupha okumele kuthiwe kuphephile kulo lonke uhlelo lokusebenza kuphela ngoba kulungisiwe noma kuyahoxiswa.
Isibonelo, iyunithi yokukhipha ingase yenze kube lula ukukhipha isinqamuleli ukuze uthole isevisi, kodwa ukususa isiqhephusi akukwenzi nje ukuthi ibhasi nezingxenye zekhebula ziphephe ukusondela. Izindlela zokuxhumanisa ezidingekayo, izinhlelo zokuzihlukanisa kanye nenqubo yokufinyelela kufanele kuhlolwe ndawonye.
I-JSGK ibala i-KYN, i-XGN kanye nemindeni yekhabhinethi ehlobene kuyo i-high-voltage switchgear range . Lezi izinkomba eziwusizo zomkhiqizo womndeni lapho kuxoxwa ngezidingo zesakhiwo, kodwa igama le-KYN noma i-XGN lilodwa aliqinisekisi ukuthi ukulungiselelwa okuthile kwe-JSGK kuhlangabezana nokucaciswa okugcwele kwe-IEEE kwensimbi.
I-IEEE ne-IEC Basebenzisa Izindlela Ezihlukene Zokuchaza I-Switchgear
Ukuthenga okuwela umngcele kuvame ukuhluleka uma igama lempahla lithathwa njengokuhumusha okuqondile kwezinga lobuchwepheshe. Iphrojekthi yase-US ingase icacise i-IEEE metal-clad switchgear, kuyilapho iphrojekthi esekelwe ku-IEC ingase icele i-switchgear evalwe ngensimbi enegama lokuqhubeka kwesevisi kanye nezigaba zangaphakathi ze-arc. Amagama ayagqagqana ngolimi olujwayelekile, kodwa izidingo zawo zokuqinisekisa kufanele zihlolwe ngokwehlukana.
IEEE C37.20.2 kanye ne-IEEE C37.20.3
I-IEEE C37.20.2-2025 imboza i-metal-clad medium-voltage switchgear nama-drawout ama-circuit breaker asebenza ngogesi kanye nokuhlanganisa okuhlobene okuhlotshaniswayo. I-IEEE C37.20.3-2023 imboza i-switchgear evalekile yensimbi elinganiselwe ngaphezulu kwe-1 kV AC kuze kufike futhi ihlanganise no-48.3 kV AC, ehlanganisa amaswishi eziphazamisi, amafuse, ukulungiselelwa okuthile kokuphula isekethe kanye nezisetshenziswa ezihlobene njengoba kucaciswe yilelo zinga. Lawa mazinga amabili awazona izitifiketi zomkhiqizo ezishintshekayo.
I-IEC 62271-200:2021 kanye nesichibiyelo 1:2024
I-IEC 62271-200 amakheli emishini yokushintsha efakwe ngaphambili yensimbi ye-AC efakwe ngaphambili kanye negiya lokulawula lama-voltage akalwe ngenhla kwe-1 kV nokufika futhi ahlanganise nama-52 kV, ukuze afakwe ngaphakathi noma ngaphandle. Ingahlanganisa ukwakhiwa kwamakhompathithi ahlukene kanye nezinhlelo zokufakwa kwe-insulation. Ukucaciswa kwe-IEC kungase kuhlanganise ukulahlekelwa kokuqhubeka kwesevisi (LSC) futhi ukuhlukaniswa kwe-arc yangaphakathi (IAC) izidingo uma zikhona.
I-LSC iphathelene nezimo ezihambisana nokugcina isevisi iqhubeka ngesikhathi sokufinyelela emagumbini achaziwe; akusona isithembiso esiphelele sokuthi wonke umsebenzi ungenziwa ngamandla. I-IAC isho ukusebenza okumenyezelwe kwangaphakathi kwe-arc ngaphansi kwezimo ezishiwo, hhayi nje ukuba khona kwe-flap yokukhulula ingcindezi noma udonga lwensimbi. Akukho ukuhlukaniswa okuwukuhumusha okukodwa kokukodwa kwegama le-IEEE elithi “metal-clad.”
| Ireferensi | Lokho okukhulunywa yi-scope eshicilelwe | Umbuzo womthengi |
|---|---|---|
| IEEE C37.20.2-2025 | I-Metal-clad medium-voltage switchgear enama-circuit breaker. | Ingabe umhlangano othile onikeziwe uyahlangabezana nalokhu kwakhiwa kanye nezidingo zephrojekthi? |
| IEEE C37.20.3-2023 | I-switchgear yesiphazamisi esifakwe ngensimbi kanye nezigaba zayo ezifakiwe zedivayisi. | Iyiphi ilungiselelo lesiphazamisi, i-fuse noma i-breaker elihlongozwayo ngempela? |
| I-IEC 62271-200:2021 + AMD1:2024 | I-switchgear yensimbi ene-AC engaphezu kuka-1 kV ukuya ku-52 kV. | Yiziphi izigaba ze-IEC, izilinganiso nezivivinyo ezishiwo kulo mhlangano? |
Uhlelo olujwayelekile nanoma yiluphi udaba lokutholwa kwendawo. Unjiniyela akufanele amukele isimangalo sokulingana esisezingeni elihlukile ngaphandle kwesigatshana ngasinye esibhaliwe noma ukuhlola okusekelwe kumfuneko okwenziwa amaqembu afanelekayo.
Ingabe I-Metal-Clad Ihlala Isho Ukuvikelwa Kwe-Arc Okungcono?
Cha. Ukuhlukaniswa kwekhompathimenti enesisekelo kuyisici sokwakha esibalulekile, kodwa akumisi ngokuzenzakalelayo ukumelana nawo wonke umcimbi we-arc yangaphakathi noma isilinganiso samaphutha esiphezulu. Izakhiwo ezintathu ezivame ukudideka kufanele zihlolwe ngokwehlukana.
- Isilinganiso sokuphazamisa isiyingi esifushane: ukuthi idivayisi yokushintsha eshiwo ingaphazamisa amandla amanje ahambisanayo ngaphansi kwezimo zayo ezilinganiselwe.
- Ukusebenza kokumelana nesikhathi esifushane: ukuthi isifunda esiyinhloko esimisiwe singakwazi yini ukumelana nephutha elithile ngesikhathi esinqunyiwe.
- Ukusebenza kwe-arc yangaphakathi: noma ngabe umhlangano uhlolwe ngaphansi kwesigaba esisebenzayo, izimo zokuhlola kanye nokuhlelwa kokufinyeleleka.
Ikhabhinethi ingaba nezithiyo zensimbi eziqinile kodwa ayinaso isimemezelo sokuhlola sangaphakathi se-arc. Ngokuphambene, inhlanganisela idivayisi yayo eyinhloko engeyona i-IEEE-clad metal-clad drawout ingase ibe nezici zokuvikela ezibhaliwe ezihambisana nezidingo zephrojekthi. Qhathanisa ubufakazi esikhundleni sokuthatha isigaba sokuphepha emagameni kuphela.
Nganoma yikuphi ukusebenza kwe-arc yangaphakathi efunwayo, buyekeza ukuhlukaniswa okumenyezelwe, izinhlangothi ezifinyelelekayo, ukulungiselelwa kokuhlolwa nezimo ezisebenzayo zokufaka. Uxhumo lwangempela lwekhebula, umzila wokungenisa umoya kanye nesakhiwo segumbi kungaba nendaba ukuthi i-switchgear efakiwe isetshenziswa kanjani. Imibhalo yomkhiqizi kanye nohlelo lokuphepha kukagesi wephrojekthi kuhlala kubalulekile.
Ukufinyelela Kwesondlo Kungashintsha Isinqumo Sokuthenga
Ukuhlela isevisi akuyona nje inketho yokufinyelela ngaphambili noma iminyango yokungena ngemuva. Kuqala ngokukhomba ukuthi iyiphi ingxenye okufanele ihlolwe noma ishintshwe, noma ngabe idivayisi iyakwazi ukuhoxiswa nokuthi yimaphi amasekhethi aseduze okufanele ahlukaniswe ukuze afinyeleleke.
Isikhungo esinezidingo zokuhlola ama-breaker njalo singabiza indlela yokukhipha ebhaliwe kanye nemishini eshintshwayo. Indawo yokusabalalisa ehlangene enomsebenzi ohlukile wokushintsha ingase inikezwe kangcono ukuhlelwa kwesiphazamisi esivalwe ngensimbi esihlangabezana nezidingo zayo zangempela zokusebenza. Asikho nesisodwa isinqumo esingenziwa ngaphandle kohlelo lukagesi kanye nemiyalelo yokuwulungisa egunyaziwe.
Cela ukuhlelwa kwekhabhinethi, izidingo zohlangothi lokufinyelela, imvume yokukhipha ama-breaker, ukufinyeleleka kwegumbi lekhebula kanye nokuxhumanisa okuqondile okuhlinzekiwe. Lezi zilinganiso zithinta uhlelo lwegumbi likagesi futhi kufanele luhlolwe ngaphambi kokuba umklamo womphakathi uphothulwe. Ikhabethe elingena ngaphambili alinakho ukunakekelwa ngokwemvelo, futhi izindawo ezifinyelelekayo azisusi amandla ngokuzenzakalelayo.
Lapho ukusabalalisa kwendandatho ehlangene kufanele khona, i-JSGK iphinda ifake ohlwini lwamayunithi ayizindandatho ezinkulu namakhabethe afakwe igesi. Imisebenzi yabo yokushintsha kanye namazinga amisiwe kufanele kubuyekezwe ngokwehlukana kunokuba kwethulwe njengelinye igama le-switchgear yensimbi.
Yikuphi Ukwakhiwa Okufanele Iphrojekthi Icaciswe?
Sebenzisa imisebenzi kagesi yephrojekthi kanye nezinga eliyisibopho njengendawo yokuqala. Uma inkontileka idinga ngokusobala i-IEEE C37.20.2 i-metal-clad switchgear, ukuhlangana okunikezwayo kufanele kuhlolwe ngokuphikisana naleyo mfuneko. Uma icacisa okokusebenza kwe-IEC 62271-200 okunezidingo ezithile ze-LSC noma ze-IAC, hlola lezo zimo ezishiwo esikhundleni sokungenisa ulimi lwe-IEEE njengento ebambele.
Ukuze uthole isinqumo esisebenzayo, khomba okulandelayo ukuze:
- Okujwayelekile kanye nendawo yokulawula: uhlelo lwenkontileka, noma yisiphi isigaba sendawo kanye nesigaba sempahla edingekayo.
- Umsebenzi oyinhloko wokushintsha: ukuhlelwa kwe-breaker noma i-switch-fuse; ukuvikela, ukuhlukaniswa kanye nokulandelana kokusebenza.
- Izilinganiso zikagesi: I-voltage elinganiselwe, yamanje eqhubekayo, i-short-circuit kanye nezidingo ze-dielectric ezifanele uhlelo.
- Izidingo zegumbi nokufinyelela: izithiyo zokuzihlukanisa, ukuhlelwa okungaguquki/kokukhipha, izindawo zokulungisa kanye nokufinyelela okugunyaziwe.
- Ukuvikela nokuhlola: ubufakazi obufanele bokushintshwa kwedivayisi, ukuhlolwa kohlobo lokuhlanganisa, ne-LSC/IAC ecacisiwe noma ezinye izigaba.
- Isixhumi esibonakalayo sesayithi: izimo zangaphakathi/zangaphandle, indlela yekhebula, izindawo zokuvula umoya, ukungena komoya kanye nobubanzi bokugunyazwa.
Ibhidi yobuchwepheshe kufanele ikhombe ukuchezuka ngokusobala. Isibonelo, umphakeli angase anikeze ikhabhinethi evalwe ngensimbi ye-IEC lapho kucelwe khona imininingwane ye-IEEE yengubo yensimbi. Lena enye indlela yobuchwepheshe edinga ukugunyazwa, hhayi okulingana okuzenzakalelayo ngenxa nje yokuthi kokubili kuqukethe izithiyo zensimbi.
Bukeza Umhlangano Onikeziwe Ngaphambi Kokugunyazwa
Ubufakazi obuwusizo kakhulu isethi engaguquki yamadokhumenti abhekisela kumhlangano ofanayo. Idatha ye-nameplate, umdwebo womugqa owodwa, ukuhlelwa kwekhabhinethi namarekhodi okuhlola kufanele kuhlonze izilinganiso ezihambisanayo nemininingwane yokumisa. Ibhukwana lomndeni womkhiqizo ohlobene ayanele ukufakazela ukuhambisana kweyunithi ehlukile enikeziwe.
| Ubufakazi | Okufanele uhlole | Kungani kubalulekile |
|---|---|---|
| Ukucaciswa kwezisetshenziswa | Izinga elibusayo, uhlelo, uhlobo lwemishini, i-voltage elinganiselwe/yamanje kanye nomsebenzi onephutha. | Ichaza idivayisi yenkontileka kanye nemfuneko yokusebenza. |
| Ukuhlelwa okujwayelekile / umdwebo wengxenye | Ibhasi, i-breaker, ikhebula, insimbi, izithiyo, iminyango yokungena kanye nezindawo zokungena. | Ibonisa ukwakhiwa kwangempela kunesigaba sokumaketha. |
| Umdwebo womugqa owodwa | Amasekhethi angenayo/aphumayo, imisebenzi yokuvikela, i-earthering kanye ne-interlock. | Iqinisekisa umsebenzi kagesi nohlelo lokusebenza. |
| Ubufakazi bokuhlola | Imodeli ehloliwe, indinganiso, izilinganiso, ukumisa, idethi kanye nemikhawulo eshiwo. | Ichaza lokho umbiko okubonisayo ngempela. |
| Ukufakwa nokugcinwa kwemibhalo | Izidingo zokufinyelela, ukuhoxa, ukuzihlukanisa, imvelo kanye negumbi. | Isekela ukuqaliswa okuphephile kanye nokuhlelwa kwesevisi yesikhathi esizayo. |
Amakhasi e-switchgear e-JSGK ahlonza imindeni yekhabhinethi enamandla kakhulu esetshenziselwa ukwamukela, ukusatshalaliswa, ukuvikela kanye nokulinganisa, ngokucushwa kokugcina kubuyekezwe ngokumelene nemidwebo yephrojekthi kanye nokucaciswa. Ngephrojekthi ethile, thumela i-JSGK izinga elidingekayo, umdwebo womugqa owodwa, izilinganiso nezimfuneko zokufinyelela kanye nokucela imibhalo yekhabhinethi enikeziwe enembe. Umehluko obalulekile awukona “ukugqokwa kwensimbi uma kuqhathaniswa nokuvalwe ngensimbi” njengesiqubulo; ukuthi ingabe umhlangano oqinisekisiwe ufana nendlela edingekayo, umsebenzi kagesi kanye nendlela yokuwulungisa.