Umahluko phakathi kweVoteji ePhantsi kunye ne-Medium Voltage Switchgear: Yeyiphi eFana iProjekthi?

I-low-voltage kunye ne-medium-voltage switchgear ikhonza izikhundla ezahlukeneyo kwinkqubo yokusasazwa kwamandla, ngoko ke abathengi akufanele bakhethe phakathi kwabo njengokungathi bezinye iisayizi zekhabhinethi. Isixhobo se-Medium-voltage sifumana, sitshintsha kwaye sikhusela amandla okuhambisa phambi kwe-transformer ye-step-down okanye kwi-node yenethiwekhi ye-MV. Isixhobo esine-low-voltage sisasaza amandla emva kokuguqulwa ukuya kumazantsi omlambo, iimotor, izakhiwo, iitshaja okanye eminye imithwalo. Ukhetho oluchanekileyo lulandela umzobo womgca omnye, i-voltage ye-nominal kunye neyona ndlela iphezulu, inqanaba lesiphoso, umhlaba, ifilosofi yokukhusela, ishedyuli yomthwalo, ilungiselelo le-transformer, i-interfaces yekhebula, indawo engqongileyo kunye nomgangatho osebenzayo. Iiprojekthi ezininzi zifuna zombini. Umsebenzi wokuthengwa kwempahla kukuchaza umda wombane wendibano nganye kunye nobungqina-ungagqiba ekubeni iLV okanye iMV "ingcono."

Yintoni uMahluko Osebenzayo phakathi kwe-LV kunye ne-MV Switchgear?

I-low-voltage switchgear ilawula iisekethe kwicala le-low-voltage yenkqubo yokusabalalisa. Imisebenzi yayo inokubandakanya abamkela imivuzo, amacandelo ebhasi, abaxhasi abaphumayo, ulawulo lweemoto, ukulinganisa nokukhusela. Isixhobo sokutshintsha i-Medium-voltage sisebenza kwicala eliluncedo okanye lokuhambisa-voltage kwaye sinokufumana kwaye sisasaze i-fiders, sitshintshe i-transformer okanye sibe yinxalenye yeringi okanye i-radial network.

Isigama kufuneka silandele ulawulo lweprojekthi kunye nomgangatho. Ileyibhile yokuthengisa ayonelanga. Umzobo womgca omnye kufuneka ichonge amandla ombane kwibhasi nganye kunye nesixhobo, ngelixa iinkcukacha zesixhobo zichaza umgangatho osebenzayo kunye neereyithingi.

Qala ngedayagram yomgca omnye kunye neNdawo yoTshintsho

Fumana indawo esetyenziswayo, i-MV eyondlayo engenayo, i-MV switchgear, i-transformer, indibano engundoqo ye-LV kunye nemithwalo esezantsi. Ukuba iprojekthi ifumana amandla ombane aphakathi kwaye iyiguqule kwisiza, idla ngokufuna ukutshintshwa/ukhuseleko lweMV phambi kwe-transformer kunye nokuhanjiswa kweLV emva kwayo. Isiza esincinci esibonelelwe ngokuthe ngqo kumbane ophantsi sinokufuna kuphela iphakheji yeLV.

Musa ukuthenga kuluhlu lomthwalo wedwa. I-SLD kufuneka ibonise imithombo eqhelekileyo kunye neminye imithombo, i-couplers yebhasi, imilinganiselo ye-transformer, i-generator okanye uxhulumaniso oluhlaziyiweyo, ulungelelwaniso olungathathi hlangothi kunye nomhlaba, amanqaku okulinganisa kunye nemida yodwa.

Zeziphi izinto eziguquguqukayo ekufuneka abathengi bathelekise?

Kutheni le nto iVoltage kunye neFault Level zizigqibo ezihlukeneyo?

I-voltage ye-Nominal ichonga iklasi yenkqubo, kodwa ayichazi umlinganiselo opheleleyo we-switchgear. Abathengi kufuneka kwakhona babonelele ngamaza, iimfuno zokugquma, umsinga olindelekileyo wesekethe emfutshane, ixesha leempazamo kunye nolungiselelo lwesiseko. Iiprojekthi ezimbini kwi-voltage efanayo yegama zinokufuna izixhobo ezahlukeneyo kuba amandla womnatha kunye namaxesha okucoca-ukukhusela ahlukile.

Musa ukucela umniki-nkonzo ukuba athathe umsebenzi wempazamo kwi-kVA ye-kVA yodwa. I-Impedans yekhebula, imithombo ehambelanayo, i-impedance ye-transformer kunye negalelo lenethiwekhi ephezulu inokutshintsha umphumo. Sebenzisa isifundo sesiphoso seprojekthi okanye isiseko soyilo esichazwe ngokucacileyo.

Zahluke Njani Iifilosofi Zokhuseleko Nolawulo?

Iindibano ze-LV zihlala zilungelelanisa abamkeli-mali kunye nabaqhekezi besekethe, ukhuseleko lweemoto, ukulinganisa iimitha kunye nolawulo. Iinkqubo ze-MV zidla ngokufuna iireyilayi zokhuseleko, ii-transformers zangoku kunye ne-voltage, ukudibanisa, iisekethe zohambo, imiqondiso ekude kunye nolungelelwaniso kunye nokhuseleko olusebenzayo okanye lwe-transformer.

Umahluko asikokuba iMV “inokhuseleko olungakumbi.” Inkqubo nganye ikhusela izixhobo ezahlukeneyo kunye neendawo eziphosakeleyo. Umthengi kufuneka akhuphe imisebenzi yokhuseleko, iimfuno ze-CT/VT, iindawo zonxibelelwano, amandla ombane olawulo kunye nengqiqo yohambo. Imizobo yababoneleli kufuneka ibonise indlela loo misebenzi iphunyezwa ngayo.

Ingaba iProjekthi iZifuna nini Zombini iLV kunye neMV Switchgear?

I-factory, i-hub yokutshaja, i-complex yezorhwebo okanye i-microgrid efumana unikezelo lwe-voltage ephakathi kunye nokusabalalisa amandla ombane ophantsi ngokuqhelekileyo idinga ikhonkco elidibeneyo: ukufumana i-MV / ukusabalalisa, i-transformer kunye ne-LV engundoqo yokusabalalisa. Iipakethe zinokubonelelwa liqela elinye okanye abaliqela, kodwa ujongano lwazo kufuneka lube ngumkhenkce.

Unxibelelwano oluphambili lubandakanya intambo yesiguquli okanye uqhagamshelo lwebhasi, ulungelelwaniso lokhuseleko, ubunini bemitha, amandla ancedisayo, imiqondiso yolawulo, uxanduva lomhlaba kunye nofakelo. Ukuthenga ipakethe nganye ngokwahlukeneyo ngaphandle kweshedyuli yojongano kunokudala izithuba nokuba ikhabhinethi nganye iyahambelana.

Yintoni umahluko phakathi kweSwitchgear kunye neSwitchboard?

Amagama ngamanye amaxesha asetyenziswa ngokwahlukileyo yimimandla kunye nabavelisi. Abathengi kufuneka bakuphephe ukukhetha ngokweleyibhile. Chaza ukwakhiwa kwendibano, ukwahlukana, uhlobo lokukhusela-isixhobo, ukufikelela, ukugcinwa, imfuno yangaphakathi ye-arc apho kufanelekileyo, ukulinganisa ibhasi, ukulinganiswa kweesekethe ezimfutshane kunye nomgangatho wokulawula.

Ukuba inkcazo isebenzisa omabini la magama, cela inqaku lesigama kunye neshedyuli yesixhobo. Igama lentengiso akufuneki likhuphe ngaphezulu imisebenzi yombane eboniswe kwi-SLD.

Yeyiphi iMigangatho ekufuneka abathengi bayibeke kwiRFQ?

Kwi-low-voltage switchgear kunye neendibano zolawulo, abathengi bahlala bevavanya iindawo ezisebenzayo zoluhlu lwe-IEC 61439. Isixhobo sokutshintsha esifakwe kwintsimbi ephakathi-voltage siqhele ukujongwa ngokweemfuno ze-IEC 62271 ezifanelekileyo. Inxalenye echanekileyo, uhlelo, ukwamkelwa kwendawo kunye nezilungiso zeprojekthi kufuneka zichazwe.

Musa ukusebenzisa i-IEC 60439-1 njengereferensi engagqibekanga yangoku kuba nje ivela kwinkcazo yemveliso endala; ithathelwe indawo sisikhokelo se-IEC 61439. Umthengisi kufuneka abuyisele igatya okanye ishedyuli yokuthobela echaza iitenxa. Imigangatho yesizwe inokubandakanywa apho iprojekthi ifuna khona, kodwa akufanele ithathe indawo yokulawula umthengi.

Ngaba abathengi kufuneka baVavanye Njani i-MNS ye-Voltge Low-Voltage Switchgear?

I udidi izixhobo zombane Dingsheng ibandakanya ukuhanjiswa kwe-LV, isikhululo sokutshintsha kunye neemveliso zesikhululo esilungiselelwe kwangaphambili. Kwiprojekthi ye-low-voltage, i Indibano ye-MNS ye-low-voltage switchgear iphepha iseka imodyuli idrowa-uhlobo usapho ejoliswe unikezelo-voltage ephantsi kunye nemisebenzi motor-ulawulo, kunye noqwalaselo ezikhethiweyo malunga feeder projekthi kunye namacandelo.

Iphepha alichazi indibano epheleleyo yeprojekthi. Abathengi kusafuneka babonelele ngevoltheji yombane, umsinga webhasi, ireyithingi yempazamo, ishedyuli yommkeli kunye nomxhasi, ukhuseleko, ukulinganisa, uhlobo lokwahlula, ukungena kwentambo, indawo ebiyelweyo, imilinganiselo kunye namaxwebhu. Ireferensi yayo epapashiweyo kwiinkqubo ezingaphantsi kwe-4000 A ngumda wentsapho, akuqinisekisi ukuba ikhabhinethi nganye ecatshulweyo inomlinganiselo we-4000 A.

Kufuneka kuqwalaselwe njani isixhobo sombane ophakathi?

Iphepha le-XGW-12 le-Dingsheng lichaza ibhokisi yangaphandle yebhokisi-uhlobo lokutshintsha-isikhululo sentsapho esetyenziselwa ukufumana nokusabalalisa amandla ombane ophakathi, kubandakanywa nenethiwekhi ye-ring-net kunye ne-transformer-feeder applications. Oku kuxhasa ukuqonda kwicala le-MV.

Ngomnikelo we-MV wangempela, qinisekisa i-voltage elinganisiweyo, inqanaba lokugquma, eliqhelekileyo langoku, ixesha elifutshane lokumelana, isixhobo sokutshintsha, i-relay yokukhusela, i-CT / VT, imfuno yangaphakathi ye-arc, i-interlocks, i-earthing switch, ukupheliswa kwekhebula, ukunikezelwa kokuncedisa, i-enclosure kunye nobungqina bokuvavanya. Ungaze udlulisele ireyithingi ukusuka kusapho lweMV ukuya kwenye.

Bubuphi ubungqina okufuneka buxhase ukuVunywa koBugcisa?

Cela i-SLD evunyiweyo, ilungiselelo eliqhelekileyo, ishedyuli ye-feeder, ukulinganiswa kwebhasi kunye nesixhobo, uluhlu lwamacandelo, iidiagram ze-wiring, ukhuseleko kunye neshedyuli yokulinganisa, iinkcukacha zokungena kwekhebula, ukulungiswa komhlaba kunye ne-matrix yokuthotyelwa. Umthengi kufuneka aqinisekise ukuba amaxwebhu onke abhekiselele kuhlaziyo olufanayo kunye noluhlu lwezixhobo.

Chaza ukuqinisekiswa koyilo, ukuqinisekiswa kwesiqhelo, i-FAT kunye novavanyo lwesayithi ngokwemigaqo elawulayo. Isatifikethi okanye ikhathalogu ayithathi indawo yemizobo engqamene neodolo ethile. Izitenxa mazihlale zivulekile de zamkelwe yinjineli enoxanduva.

Zeziphi iimpazamo zoKhetho eziQhelekileyo ezidala umngcipheko?

1. Ukukhetha ngegama lombane kuphela: umsebenzi wesiphoso kunye nokhuseleko kuhlala kungachazwanga.
2. Ukungahoyi indawo yesiguquli: Imida yephakheji ye-MV kunye ne-LV ayicacanga.
3. Ukusebenzisa i-"switchboard" kunye ne "switchgear" ngokutshintshanayo: ulwakhiwo kunye novavanyo olulindelekileyo luyahlukana.
4. Ukucaphula kwi-SLD engagqitywanga: ukubalwa kwesondlo kunye neereyithingi ziyatshintsha emva kokuba ubunjineli buqalisile.
5. Ukusebenzisa ireferensi ephelelwe lixesha okanye engaphelelanga: ababoneleli ngexabiso imida yokuqinisekisa eyahlukeneyo.
6. Ukuthelekisa amaxabiso ekhabhinethi: amacandelo, ukhuseleko, ukulinganisa kunye namaxwebhu awaqhelekanga.

Kufuneka iquke ntoni i-LV/MV Switchgear RFQ?

1. I-SLD kunye nefilosofi yokusebenza kwenkqubo
2. Umbane oqhelekileyo/uphezulu kunye nobuninzi
3. Umthombo kunye nedatha yesiguquli
4. Iireyithingi zebhasi kunye nesondlo
5. Inqanaba lempazamo kunye nobude
6. Inkqubo yomhlaba
7. Ukhuseleko, ukulinganisa kunye nonxibelelwano
8. Umntu ongenayo, i-coupler kunye neshedyuli yesondlo
9. Izinto ezikhethwayo
10. Ukungena kwekhebula kunye nokupheliswa
11. Indawo yangaphakathi/yangaphandle
12. I-enclosure, ukwahlukana kunye neemfuno ze-arc
13. Imigangatho esebenzayo kunye nokuhlelwa
14. Imizobo, ukuqinisekiswa kunye neFAT
15. Ukufakela/ukugunyazisa umda
16. Ubungakanani, indawo ekuyiwa kuyo kunye neshedyuli

Ngenisa amaxwebhu eprojekthi nge Ifomu yesicelo seprojekthi ye-Dingsheng switchgear kwaye ifuna iNgcaciso eQinisekisiweyo, yokutenxa, eyenye okanye iNgeniso yoMthengi efunekayo ngokuchasene nawo wonke umhlaba wemathiriyeli.

Imibuzo Ebuzwa Rhoqo

Ngaba i-medium-voltage switchgear ihlala iphezulu kwi-LV switchgear?

Kwinkqubo ye-step-down eqhelekileyo, ewe, kodwa i-SLD yeprojekthi kunye noxhulumaniso oluluncedo luchaza ilungiselelo langempela.

Ngaba ikhabhinethi ye-MNS ingasitshintsha isixhobo sokutshintsha esiphakathi kombane?

Hayi. I-MNS yintsapho yendibano ye-low-voltage kwaye ayinakuthatha indawo yezixhobo ezifunekayo kwindawo yothungelwano lwe-medium-voltage.

Ngaba ibhasi ephezulu yangoku yenza i-LV switchgear ilungele iMV?

Hayi. Ukulinganisa kwangoku kunye neklasi ye-voltage yahlukile. I-Insulation, utshintsho, ukhuseleko kunye neemfuno zokuvavanya ziyahluka.

Yintoni ekufuneka abathengi bayikhenkce kuqala?

Friza i-SLD, i-voltage, umthombo/idatha yenguqu, inqanaba lempazamo, ukwenza umhlaba, ifilosofi yokhuseleko kunye neshedyuli yesondlo phambi kobunjineli bezixhobo zokugqibela.