TL;DR — Oko Ufanele Ukwazi
- Iibhloko zesiphelo esinzima ezilinganiswe kwi-150A kunye nokwamkelwa kwentambo ye-35mm² (AWG 2) ziyindlela eqhelekileyo yokusasazwa kwamandla kwiziko lolawulo lweemoto — zibonelela ngeendawo zonxibelelwano ezikhuselekileyo nezicwangcisiweyo zeentambo ze-motor feeder ukuya kuthi ga kwi-50mm².
- Imisinga yokungena kwenjini (6-8× FLA) ifuna iibhloko zesiphelo ezinobunzima obukhulu bobushushu — iibhloko zesiphelo solawulo ezisemgangathweni ezilinganiswe kumbane ofanayo ozinzileyo ziya kusilela phantsi kwemijikelo yomsebenzi we-MCC kuba azinawo umxube wekopolo wokufunxa amandla okungena.
- Indawo emnandi engama-35mm² (AWG 2) ayixhomekekanga kwimfuneko: ilungelelanisa ngokugqibeleleyo ubukhulu (150A kunye nomda wokhuseleko we-25% kwi-40°C), ulawulo lwentambo yoomatshini (i-bend radius
- Ngqo ukusuka kumzi-mveliso wethu, iibhloko zesiphelo esinzima zixabisa ngaphantsi kwama-35-50% kuneempawu zaseYurophu eziqinisekisiweyo yi-IEC/UL — kunye namaxesha okukhokela eeveki ezi-2-3 kwiimveliso zekhathalogu eziqhelekileyo.
- Ulungelelwaniso lwe-SCCR lulona mngcipheko uphezulu wokuthobela imithetho ekukhethweni kwebhloko yesiphelo se-MCC — soloko uqinisekisa ukuba umlinganiselo wamandla ombane we-terminal block uyahambelana ne-SCCR iyonke ye-MCC (ngesiqhelo i-42kA ukuya kwi-65kA kwizixhobo zanamhlanje).
Yintoni echaza iBloko yeTerminal eSebenzayo kakhulu kwiiZiko zoLawulo lweeMoto?
Mandichaze ngqo ukuba lithetha ukuthini igama elithi "umthwalo onzima" — kuba eli gama lisetyenziswa ngokungakhathali kweli shishini. Ibhloko yesiphelo esinzima, ngokwenkcazo ecacileyo, yileyo yenzelwe ukulinganiswa kwamandla aqhubekayo ukusuka kwi-100A ukuya kwi-400A, kunye nobubanzi bokwamkelwa kwentambo obuqala kwi-10mm² (AWG 8) kwaye bufikelele kwi-150mm² (300 kcmil). Ezi azizizo iibhloko zesiphelo ozisebenzisayo kwiintambo ze-PLC I/O okanye ii-4-20mA instrument loops. Ezi ziibhloko ezihlala phakathi kwebhasi ephambili ye-MCC kunye neeyunithi zokuqalisa imoto nganye — ezo zithwala amandla aneleyo okuqhuba i-75kW (100 HP) induction motor.
Kwifektri yethu, sidweba umgca ocacileyo: Ukuba ibhloko yesiphelo ilawula amandla okuhambisa iimoto — hayi amandla okulawula, hayi iingcingo zesignali, kodwa amandla okwenyani ezigaba ezintathu ajikeleza imoto — iwela kudidi lwethu lwemveliso enzima. Lo mgca ukho ngenxa yesizathu esithile sobunjineli: iisekethe zemoto zineengxaki ezintathu zombane ezingazenziyo iisekethe zolawulo, kwaye uyilo lwebhloko yesiphelo kufuneka luqwalasele zontathu ngaxeshanye.
Kutheni Amaziko Olawulo Lweemoto Efuna Iibhloko Zesiphelo Ezahlukeneyo
Iziko lolawulo lweemoto, xa sithetha ngombane, yenye yezona ndawo zinobungozi kakhulu zokunxibelelana kweebhloko zesiphelo. Ndifunde esi sifundo ngo-2012 xa omnye wabathengi bethu bokuqala waxela ukusilela kwebhloko yesiphelo kwi-MCC emva kweenyanga ezisibhozo zokusebenza - iibhloko ezaziphumelele uvavanyo ngalunye lwefektri ngemibala eqaqambileyo. Xa sasiqhuba injineli yethu ngenqwelomoya ukuya kwindawo (ifektri yokuhlanganisa iimoto eMichigan), safumanisa ingxaki kwimizuzu eli-15: Iibhloko zesiphelo zazanele ngokupheleleyo ukusebenza kwe-120A engaguqukiyo, kodwa zaziphantsi koxinzelelo lwe-720A izihlandlo ezintandathu ngeyure njengoko iimoto zomgca wokuvelisa zazihamba kwaye ziphuma.
Utyelelo olunye nje oluya kwindawo ethile lutshintshe kakhulu indlela esiyila ngayo kwaye sinike umlinganiselo kwiibhloko zethu zesiphelo esinzima. Nantsi into efunwa yi-MCC environments ukuba iibhloko zesiphelo esiqhelekileyo zingayiphumezi:
Inrush Current: Umbulali Ofihliweyo
Iimoto ezikhupha i-amperage yazo epheleleyo (FLA) zitsala amaxesha ama-6-8 ngexesha lokuqalisa — imoto engama-75kW ene-140A FLA iya kutsala i-840-1120A malunga nemizuzwana emi-2-5 ngexesha lokuqalisa kumgca wonke. Nangona ii-starters ezithambileyo zithintela ukungena ngokukhawuleza ukuya kwi-3×FLA, usajonge i-420A edlula kuqhagamshelo lwe-terminal block. Ngenxa yokuba iibhloko zesiphelo esiqhelekileyo zivavanywa ukusebenza kobushushu kwi-current elinganisiweyo kuphela, kungekhona ukugqithisa kwexesha elifutshane, i-cross-section yazo yobhedu ayinayo i-thermal mass yokufunxa amandla okungena ngaphandle kokudlula ubushushu obuthambileyo be-PA66 housing.
Ukungcangcazela: Isikhululeli soQhagamshelo
Ii-MCC zizele zii-contactors ze-electromechanical ezivala ngokwasemzimbeni zize zivuleke izihlandlo ezingamawaka ngemini. Umsebenzi ngamnye we-contactor uthumela umothuko woomatshini kulo lonke ulwakhiwo lwecandelo elithe nkqo — kwaye ibhloko nganye yesiphelo efakwe kweso sakhiwo iyayiva. Iibhloko zesiphelo zesikrufu eziqhelekileyo ezine-torque yokuqinisa eyi-1.2-1.5 Nm ziya kukhululeka kancinci phantsi kolu ngcangcazelo. Iibhloko ezinzima zisebenzisa izikrufu zentsimbi ze-M5 okanye ze-M6 ezine-torque eyi-2.5-5.0 Nm, kwaye i-geometry yesikrufu ibandakanya uphawu oluzitshixayo (i-conical spring washer okanye umphezulu woqhagamshelwano olugobileyo) oluthintela ukujikeleza phantsi kongcangcazelo.
Indawo eValiweyo kunye nokuNcitshiswa kobushushu
Iindawo ezithe nkqo ze-MCC zixinene: iibhasi, ii-circuit breakers, ii-contactors, ii-overload relay, ii-control transformers, kunye nee-terminal blocks zonke zikhuphisana ngesithuba kwindawo ebiyelweyo ye-NEMA 1 okanye ye-NEMA 12. Amaqondo obushushu angaphakathi kwi-MCC esebenzayo afikelela rhoqo kwi-50-55°C — 10-15°C ngaphezulu kwesiseko esiqhelekileyo sereyithingi ye-40°C kwiibhloko zesiphelo. Kwi-ambient ye-55°C, umlinganiselo wamandla osebenzayo webhloko yesiphelo kufuneka uncitshiswe yi-12-15%, oko kuthetha ukuba umlinganiselo we-nameplate ye-150A uba ngumthamo oqhubekayo we-128-132A. Iibhloko ezinzima ezineebha ezinkulu zobhedu zigcina umda omkhulu wobushushu kule meko ichanekileyo.
Uluhlu lweeNtambo ezingama-35mm² (AWG 2): Kutheni le nto inguMgangatho we-MCC
Umqhubi we-35mm² uhlala kwindawo apho kukho imida emithathu yobunjineli edibana khona kuyilo lweziko lolawulo lweemoto. Ayilonani elingacwangciswanga — lisiphumo sokuphucula ubungakanani, ukuphathwa ngoomatshini, kunye neendleko.
| Ipharamitha | 25mm² (AWG 4) | 35mm² (AWG 2) | 50mm² (AWG 1/0) |
|---|---|---|---|
| Ubungakanani bombane kwi-40°C (ubhedu, i-3-conductor kwi-conduit) | 110A | 145A | 170A |
| I-Ampacity kwi-55 ° C (i-MCC yangaphakathi, iyancipha) | 93A | 123A | 144A |
| Umda wokhuseleko ongaphezulu kwe-150A block rating | -26% ❌ | +21% ✅ | +42% (ubukhulu obugqithisileyo) |
| Ububanzi obungaphandle bentambo (i-XLPE insulated) | ~14mm | ~16mm | ~19mm |
| Irediyasi egobileyo encinci (nge-NEC nganye) | ~98mm | ~112mm | ~133mm |
| Ixabiso ngemitha nganye (ngokuthelekiswa) | 0.75× | 1.00× | 1.40× |
Itheyibhile iyichaza ngokucacileyo le nto: i-35mm² yi-goldilocks conductor yeesekethe zeemoto ze-150A. Intambo engama-25mm² ayinkulu kangako kune-150A kumaqondo obushushu aphezulu e-MCC — ubuya kuxhomekeka kwi-thermal margin ye-terminal block ukuze ihlawulele i-conductor engankulu kangako, nto leyo engalunganga kubunjineli. Intambo engama-50mm² ikhuselekile kodwa inkulu kakhulu — ibiza ngaphezulu ngama-40%, ifuna indawo engakumbi yokugoba, kwaye ayikufumani nto ekusebenzeni kombane kuba i-terminal block ngokwayo yeyona nto ithintelayo kwi-150A.
Iiteknoloji zoQhagamshelo kwizicelo ezinzima
Xa ucima intambo ye-35mm² motor feeder ngaphakathi kwi-MCC, Itekhnoloji yoqhagamshelo ibaluleke kakhulu njengovavanyo lwebhloko yesiphelo ngokwaso. Senza iintlobo ezine ezahlukeneyo zoqhagamshelo kumgca wethu weemveliso ezinzima, kwaye nganye inomzekelo othile wokusetyenziswa:
Uqhagamshelo lweStud/Bolt (Lucetyiswa kwi ≥35mm²)
I-stud yentsimbi ye-M6 okanye ye-M8 ene-hex nut kunye ne-spring washer yamkela ii-terminals zeringi ezigobileyo. Le yeyona ngcebiso yethu inamandla kuyo nayiphi na i-conductor engama-35mm² nangaphezulu, ngakumbi kwiintambo zonxibelelwano ezisebenzisa umgca (ezingenayo) kwizicelo ze-MCC. Izizathu ziyamangalisa: isiphelo seringi sibonelela ngonxibelelwano olujikeleze i-stud ngama-degree angama-360, uqhagamshelo loomatshini alunakungcangcazela xa luxinzelelwe kakuhle, kwaye — ngokubalulekileyo kulondolozo — Isiphelo seringi sinokuqhawulwa kwaye sidityaniswe kwakhona amaxesha amaninzi ngaphandle kokonakalisa umqhubi, nto leyo ebaluleke kakhulu xa iibhakethi zeMCC kufuneka zitshintshwe ngexesha lokulungiswa kwakhona komgca wemveliso.
I-Power Screw Clamp (Ye-10-35mm²)
Isikrufu sentsimbi i-M5 okanye i-M6 siqhuba ipleyiti yoxinzelelo ecinezela umqhubi kwibha yombane wekopolo. Olu lolona hlobo lwethu loqhagamshelo oludumileyo kwiiphelo ze-motor feeder kuluhlu lwe-10-35mm² kuba ludibanisa ukufakwa ngokukhawuleza (ngaphantsi kwemizuzwana engama-30 ngocingo ngalunye kunye ne-screwdriver esebenza ngamandla) kunye nokuthembeka okuhle kakhulu kwexesha elide. Isikrufu sisebenzisa i-torque eyi-3.0-4.0 Nm — eyaneleyo ukutshixa imicu yomqhubi kwindawo yokudibanisa ubhedu efakwe kwi-tin, nto leyo eyenza uqhagamshelo olungangenisi gesi olumelana nokubola kwe-oxidation kunye nokujikeleza kobushushu.
I-Box Lug/Saddle Clamp (Yee-16-50mm², Iindidi ze-Mixed Conductor)
Isibambo sesihlalo esimile okwe-U esinezikrufu ezimbini senza ukubamba okuzimeleyo kumacala omabini omqhubi. Olu yilo lubalulekile xa kucinywa iileyiti ze-aluminium motor ecaleni kweentambo ze-copper feeder — kuba luhambelana nee-coefficients ezahlukeneyo zokwandisa ubushushu be-aluminium (23×10⁻⁶/K) xa kuthelekiswa ne-copper (17×10⁻⁶/K) ngaphandle kokuvelisa iindawo ezishushu kwindawo yoqhagamshelwano.
Iibhloko zeStud zoSasazo lwaMandla (KwiiNxibelelwano zeBhasi eziPhambili)
Ezi zezona bhloko zethu zinkulu, ezinezikhonkwane ze-M10 okanye ze-M12 ezilinganiswe kwi-250-400A. Zisetyenziswa apho i-busbar ye-MCC ethe nkqo iqhagamshela kwiintambo ze-feeder ezingenayo — indawo yokuqala yoqhagamshelo kwiziko lolawulo lwemoto. Kule nqanaba langoku, ibhloko yesiphelo iba yinxalenye yesakhiwo, kungekuphela nje isixhumi sombane - amandla oomatshini avela kwi-150mm² cable bending kufuneka axhaswe yi-terminal block housing kunye ne-DIN rail mounting yayo, kungekuphela nje nge-copper stud.
Iziqinisekiso: Oko Kuya Kufunwa Yimigaqo Yakho ye-MCC
Iinkcukacha zokuthengwa kweziko lolawulo lweemoto azicacanga malunga neemfuno zesatifikethi se-terminal block. Ukuba ingcaciso ifuna izixhobo ze-MCC ezidweliswe kwi-UL 845 (njengoko phantse zonke ii-MCC zoshishino zaseMntla Melika zisenza), ngoko yonke into engaphakathi - kuquka iibhloko zesiphelo - kufuneka ibe nophawu olufanelekileyo lwe-UL.
Kwiibhloko zesiphelo esinzima kwizicelo ze-MCC, iziqinisekiso ezibalulekileyo zezi:
I-UL 1059 (Umgangatho weeBloko zeTerminal) — igubungela iibhloko zesiphelo ezilinganiselwe ukuya kuthi ga kwi-1500V. Uhlelo lwe-UL 1059. 6-2024, iibhloko zesiphelo kufuneka zivavanyelwe ukumelana ne-dielectric, ukunyuka kobushushu kumbane olinganisiweyo, kunye ukumelana nomsinga we-short-circuit. Iibhloko zethu ezinzima ezidweliswe kwi-UL zithwala amanqaku e-SCCR ukusuka kwi-10kA ukuya kwi-65kA kuxhomekeke kulungelelwaniso lwesixhobo sokukhusela esingaphezulu — kwaye sinikezela ngeetafile zolungelelwaniso lwe-SCCR kwiphepha ledatha lemveliso nganye.
I-CSA C22.2 Inombolo 158 — into efanayo neyaseKhanada, efunekayo kwii-MCC ezifakwe eKhanada. Uvavanyo lwe-CSA longeza uvavanyo olunefuthe elibandayo kwi--35°C olungafunwa yi-UL, olubalulekileyo kufakelo lwe-MCC lwangaphandle kwimozulu yasemantla.
I-IEC 60947-7-1 — umgangatho wamazwe ngamazwe. Ngokwe isilungiso samva nje, iibhloko zesiphelo kufuneka zibhengeze ngokucacileyo umlinganiselo wamandla okumelana nexesha elifutshane (Icw) — umlinganiselo wamandla onokuthi uthwalwe yibhloko umzuzwana omnye ngaphandle komonakalo. Kwibhloko enzima ye-150A, ixabiso le-Icw lidla ngokuba phakathi kwe-3.0kA ukuya kwi-4.5kA (umzuzwana o-1), ekufuneka lihambelane namandla e-MCC's upstream circuit breaker let-through energy.
Ukukhetha umthengisi weTerminal Block onzima: Yintoni eyahlula umgangatho kwiCompromise
Ndifuna ukujongana nale ngongoma ngokuthe ngqo okufanelekileyo kuba Imakethi yebloko yesiphelo igcwele ababoneleli abathengisa iimveliso ezibonakala zifana kwiifoto zekhathalogu kodwa zisebenza ngendlela eyahlukileyo phantsi kweemeko zokusebenza ze-MCC.
Nantsi into esiyifundileyo yokwahlula ibhloko yesiphelo esinzima esisemgangathweni kweyempahla - kunye nento omele uyiqinisekise xa uvavanya nayiphi na umthengisi weebhloko zesiphelo esinzima:
1. Isiqinisekiso sobunyulu bekopolo. Ibhasi yobhedu ye-C11000 yokwenyani ineempepha ezilandelelanisa nayo ukuya kwindawo yokuhluza ubhedu. Ubhedu olungeyonyani okanye oluphinda lusetyenziswe — oluxhaphake kakhulu kwiibhloko zesiphelo ezingabizi kakhulu — luqulethe ukungcola (ngokuyintloko isinyithi kunye neoksijini) okunciphisa ukuhanjiswa kombane nge-5-15% kwaye kudala iindawo ezishushu kwindawo ethile kwimida yeenkozo. Sinikezela ngeziqinisekiso zovavanyo lomatshini kuzo zonke iibhetshi zobhedu ezisetyenziswa kumgca wethu onzima womsebenzi.
2. Ubukhulu bepleyiti yetin. I-tin plating kwi-copper busbar isebenza iinjongo ezimbini: ithintela i-copper oxidation (eyandisa ukumelana nokudibana ngokuhamba kwexesha), kwaye idala umphezulu othambileyo, ohambelanayo odibanisa i-conductor ngokubandayo phantsi koxinzelelo lwe-screw. Ubukhulu beplatingi esemgangathweni weshishini yi-3-5μm; siplatinga ukuya kwi-5-8μm kuba i-2-3μm eyongezelelweyo yandisa ifestile yokukhusela i-oxidation ukusuka kwiminyaka emi-5 ukuya kwi-15+ kwiminyaka kwiindawo ezilawulwayo zangaphakathi.
3. Umgangatho wentsimbi yesikrufu kunye nonyango lobushushu. Izikrufu zokubambelela kwibhloko yesiphelo esinzima kufuneka zigcine iimpawu zazo zoomatshini kumawaka emijikelo yobushushu ukusuka kwi -40°C ukuya kwi +130°C. Sisebenzisa izikrufu zentsimbi yekhabhoni zebanga lesi-8.8 ezineplatingi ye-zinc-nickel kunye ne-chromate conversion coating — olu dibaniso lubonelela ngokumelana nokugqwala kwe-5× kwezikrufu eziqhelekileyo ezineplatingi ye-zinc kwaye lugcina amandla okubamba kuluhlu olupheleleyo lobushushu.
4. Ukwakheka kwezinto zendlu. Iindlu ezininzi zeebhloko zesiphelo ziphawulwe ngokuthi "PA66" ngaphandle kokuchaza umxholo wefayibha yeglasi. Ipesenti yokuqinisa ifayibha yeglasi (ngesiqhelo i-25% okanye i-30%) ichaphazela ngokuthe ngqo uzinzo lobukhulu bendlu phantsi kobushushu — kwi-130°C, indlu ye-PA66 GF25 igcina malunga ne-40% yamandla ayo okutsalwa kobushushu begumbi, ngelixa i-PA66 GF30 igcina i-55%. Kwiibhloko ezinzima ezisebenza kumaqondo obushushu aphezulu e-MCC, umahluko phakathi kwe-GF25 kunye ne-GF30 ngumahluko phakathi kwendlu egcina ukuqina komsonto wesikrufu kunye nenye engagciniyo.
Ukudibanisa iiBhloko zeTerminal eziNzima kwiiMCC Designs: Ubunjineli obuSebenzayo
Ekubeni ndibonelele ngeebhloko zesiphelo kubavelisi be-MCC kunye nabakhi beepaneli kangangeminyaka engaphezu kweshumi, nazi iinkcukacha zokudibanisa ezenza umahluko phakathi kofakelo olucocekileyo kunye noloyiko lokusombulula iingxaki:
Ucwangciso lweNdawo yeWireway. Iindawo ezithe nkqo ze-MCC zihlala zinobubanzi be-wireway obuyi-100-150mm kwicala lasekunene. I-heavy duty terminal block assembly eneendawo ezili-12 kwi-15mm pitch ithatha i-180mm ye-DIN rail — kunye ne-cable bend radii yee-conductors ezingama-35mm² zongeza malunga ne-110mm kwicala ngalinye. Oku kuthetha ukuba ibhloko eneendawo ezili-12 idla ngokufanelekileyo i-400mm yesithuba se-wireway esithe nkqo, ekufuneka sibalwe kumzobo woyilo lwecandelo le-MCC ngaphambi kokuba intambo yokuqala itsalwe.
Ulawulo lobushushu. Indibano yebloko yesiphelo se-150A eneendawo ezisi-8 ezithwala umyinge we-110A kwindawo nganye ivelisa malunga ne-6-8W yobushushu kwindawo nganye ngenxa yokumelana nokuxinana kunye nokulahleka kwe-busbar I²R — malunga ne-50-65W iyonke. Kwicandelo le-NEMA 12 MCC elivaliweyo elingenamoya onyanzelisiweyo, loo 65W iya kunyusa ubushushu bangaphakathi becandelo malunga ne-5-8°C ngaphezu komoya ongqongileyo kwisithuba seeyure ezi-4. Oku kunyuka kobushushu okongezelelweyo kufuneka kongezwe kwi-ambient derating calculation — ngokwenene, ibhloko ye-150A kwi-NEMA 12 MCC egcwele ngokupheleleyo idla ngokusebenza ngokufanelekileyo njengebhloko ye-135A.
Iintambo zokuxhuma iBloko ukuya kwiStarter kwiTerminal. Eyona mpazamo ixhaphakileyo yocingo esiyibonayo entsimini kukusebenzisa iintambo ze-motor feeder ukusuka kwi-terminal block ukuya kwi-motor starter sisebenzisa ii-jumpers ezincinci. Ukuba ibhloko yesiphelo ilinganiswe nge-35mm² engenayo kwaye i-motor starter yamkela ii-35mm² lugs, i-jumper ephakathi kwazo nayo kufuneka ibe yi-35mm² — hayi i-16mm² okanye i-25mm² kuba nje kulula ukuyigoba. I-jumper ye-16mm² kwisekethe ye-150A iya kushushu ngama-30-40°C kunabaqhubi be-35mm² kumacala omabini, nto leyo edala indawo yobuthathaka kubushushu ebonwa ngabahloli ngakumbi.
Ixabiso lilonke lobunini: Ngaphaya kwexabiso lokuthenga
Amaqela okuthenga agxininisa kwixabiso leyunithi; iinjineli zokulungisa zigxininisa ekuthembekeni. Ixabiso lilonke lokubala ubunini lidibanisa le mibono - kwaye kumava ethu, yeyona ngxoxo inamandla yokutyala imali kwiibhloko zesiphelo semisebenzi enzima ezisemgangathweni.
Masibale i-TCO kwi-20-position heavy duty terminal block assembly kwi-MCC — sithelekisa isisombululo se-premium-direct generator kunye ne-commodity import:
| Ixabiso leCandelo | Ibhloko yePremium (J-Guang, ngqo) | Ukungenisa impahla ngaphandle |
|---|---|---|
| Ixabiso lokuthenga lendibano yezikhundla ezingama-20 | $48.00 | $28.00 |
| Umsebenzi wokufakelwa (iiyure ezi-2 × $65/iyure) | $130.00 | $130.00 |
| Ulondolozo lonyaka (ukuhlolwa kwakhona kwe-torque, iiyure eziyi-0.5 × $65/iyure) | $32.50 | $32.50 |
| Amathuba okungaphumeleli kwiminyaka emi-5 yobomi benkonzo | 0.5% | 3.2% |
| Ixabiso ngesiganeko ngasinye sokungaphumeleli (ixesha lokungasebenzi + ukutshintshwa) | $2,800 | $2,800 |
| Ukusilela okulindelekileyo kuxabisa ngaphezulu kweminyaka emi-5 | $14.00 | $89.60 |
| I-TCO yeminyaka emi-5 iyonke | $354.50 | $410.10 |
Ibhloko yeprimiyamu ibiza i-$20 ngaphezulu kwangaphambili kodwa igcina i-$55.60 kwiminyaka emihlanu - imbuyekezo ye-2.8× kutyalo-mali olunyukayo. Kwaye olu balo alubandakanyi iindleko zokungasebenzi kwemveliso ngelixa ibhloko engasebenziyo itshintshwa, ethi kumgca wokuvelisa ovelisa i-$5,000/iyure kwingeniso, yongeze i-$10,000-20,000 ngesiganeko ngasinye sokusilela.
Imibuzo ebuzwa qho
Q: Ngaba iibhloko zesiphelo ezinzima zingasetyenziselwa zombini iileya zemoto yobhedu kunye neye-aluminium?
Ewe — kodwa kuphela ngeempawu ezithile zoyilo. Ii-conductor ze-aluminium zifuna iibhloko zesiphelo ezinee-tin-plated okanye i-silver-plated copper contact surfaces kunye neendlela zoqhagamshelo ezilinganiswe ukusetyenziswa kwe-Al/Cu (bimetallic). I-IEC 60947-7-1, iibhloko zesiphelo ezilinganiswe kwiikhontrakthi ze-aluminium kufuneka zenze uvavanyo olongezelelweyo lokujikeleza kobushushu (ii-cycles ezingama-500 phakathi kwama-25°C kunye nama-110°C) kuba i-CTE ephezulu ye-aluminium idala uxinzelelo olukhulu kwindawo yoqhagamshelwano. Iibhloko zethu ezilinganiswe yi-Al/Cu zisebenzisa iindawo zokudibanisa ezinamazinyo kunye nee-washers zasentwasahlobo zaseBelleville ukugcina uxinzelelo lokudibanisa oluqhubekayo nangona umqhubi we-aluminiyam ekhula ngokwahlukileyo ngobushushu.
Q: Luluphi ulondolozo olufunekayo kwiibhloko zesiphelo esinzima kwinkonzo ye-MCC?
Ukulungiswa kwakhona kwe-torque rhoqo ngonyaka kwazo zonke iintambo zoqhagamshelo lwezikrufu ezifikelelekayo yeyona mfuneko incinci. Sikwacebisa ukuba kuhlolwe i-thermographic (ukuskena ikhamera ye-infrared) ngexesha lokuvalwa kolondolozo rhoqo ngonyaka — ukunyuka kobushushu obungaphezulu kwe-15°C ngaphezulu kweebhloko zesiphelo ezikufutshane kubonisa ukuba kukho uqhagamshelo olukhulayo oluxhathisayo olufuna ingqalelo ekhawulezileyo. Kwiibhloko ezikwicandelo le-MCC elingcangcazela kakhulu (ezo ziqalayo zibhabha ngaphezulu kwe-10 ngeyure), uhlolo lwesiqingatha sonyaka lufanelekile.
Q: Zingaphi iibhloko zesiphelo ezinzima ezinokufakelwa kwireyile enye ye-DIN kwi-MCC?
Izinto ezithintelayo kukutshatyalaliswa kobushushu, kungekhona indawo ebonakalayo. Ireyile ye-DIN eyimitha e-1 eqhelekileyo kwicandelo elime nkqo le-MCC inokuthwala ngokwasemzimbeni izikhundla ezingama-40-50 zeebhloko zesiphelo esinzima kwi-20mm pitch. Nangona kunjalo, ukuba ezo bhloko zonke zithwala umbane ophantse ulinganiswe, umbane ophumayo wobushushu odibeneyo ungadlula amandla okupholisa endalo ecandelo. Isikhokelo sethu sobunjineli: musa ukudlula izikhundla ezinzima ezingama-30 ngemitha nganye yomgca we-DIN rail ngaphandle kokuba icandelo le-MCC libandakanya umoya ophoqelekileyo — kwaye hlala wahlula amaqela eebhloko ezinombane ophezulu ezineendawo ezimbini ezingenanto okanye iibhloko zesignali ezinombane ophantsi ukuze wenze ukuqhekeka kobushushu kwindlela yebhasi.
Q: Ngaba ndifuna iibhloko ezahlukeneyo zee-terminal zeemoto ezidityaniswe ne-VFD xa kuthelekiswa neemoto ezisebenzisa i-alternative-line kwi-MCC efanayo?
Ewe — kwaye le yinkcukacha esoloko ingahoywa. Ii-waveforms ze-VFD eziphumayo ziqulathe ii-harmonics eziphezulu (ii-switching frequency ze-2-16 kHz) ezonyusa impembelelo yesikhumba kwii-copper conductors kwaye zivelise ubushushu be-I²R obongezelelweyo kwii-terminal block connections. Ngokovavanyo lwethu, ibhloko yesiphelo se-150A eqhagamshelwe kwisiphumo se-VFD esisebenza kwi-8kHz switching frequency kufuneka incitshiswe ibe malunga ne-130A (ukunciphisa kwe-13%) ukuze kuthathelwe ingqalelo ukufudumeza okongeziweyo kwe-harmonic. Ukuba uxuba i-VFD kunye neziqalisi ezipheleleyo kwi-MCC efanayo, chaza iibhloko zesiphelo ezisekelwe kwi-VFD yokulinganisa ukuhambelana — ukucacisa ngaphezulu iseti enye yeebhloko kubiza kancinci kunokugcina izinto ezimbini ezahlukeneyo zomgca.
Q: Lingakanani ixesha elifunekayo lokulungiselela iibhloko zesiphelo esinzima?
Kwimveliso yethu eqhelekileyo (80A-400A), iimveliso zekhathalogu zithunyelwa kwiintsuku ezi-5-7 zomsebenzi ukusuka kwiziko lethu laseNingbo. Uqwalaselo olwenziwe ngokwezifiso — ukubalwa kweepali ezingezizo ezisemgangathweni, ukulinganiswa kwamanje okuxutyiweyo, ikhowudi yemibala ekhethekileyo, ukumakishwa okwenziwe ngokwezifiso — kufuna iiveki ezi-2-3 kubandakanya ukuvunywa kobunjineli kunye nokuhlolwa kwenqaku lokuqala. Sigcina isitokhwe se-buffer sazo zonke iiprofayili zebhasi zekopolo ezisemgangathweni kunye neemolds zezindlu, ngoko ke uqwalaselo olwenziwe ngokwezifiso lunqunyelwe kakhulu lixesha lokuhlanganisa kunye nokuvavanya, kungekhona ukufumaneka kwezinto eziluhlaza. sara@nbjguang.com ngeenkcukacha zakho zexesha elifanelekileyo lokunikezelwa.
Kutheni uJ-Guang engumthengisi wakho weTerminal Block onzima
Besisenza iibhloko zesiphelo kangangeminyaka eli-15 — ukusukela ngo-2010. Ngelo xesha, sithumele izithuba ze-terminal block ezingaphezulu kwezigidi ezingama-50 kubathengi abakumazwe angaphezu kwama-40. Umgca wethu wemveliso enzima wenziwe ngokukodwa ngenxa yamava okusilela kwentsimi ka-2012 eMichigan - kwaye isigqibo ngasinye soyilo kwiimveliso zethu zangoku sibuyela emva kwiimeko zokusebenza ze-MCC zehlabathi lokwenyani, kungekuphela nje kwiinkcukacha zovavanyo lwelebhu.
Amandla ethu okuvelisa iibhloko zesiphelo esinzima aquka:
- Uvavanyo lwangoku: 80A, 100A, 125A, 150A, 175A, 200A, 250A, 300A, kunye ne-400A
- Uluhlu lweengcingo: 6mm² ukuya kwi-150mm² (AWG 10 ukuya kwi-300 kcmil)
- Iintlobo zoqhagamshelo: I-Stud/bolt (M5-M12), i-power screw clamp, i-box lug/i-saddle clamp
- Iziqinisekiso: I-UL 1059 idwelisiwe, iphawulwe nge-CE, ithobela i-RoHS/REACH, i-ISO 9001:2008 QMS
- Uvavanyo lwe-SCCR: 10kA ukuya kwi-65kA kunye neetafile zezixhobo zokukhusela ezilungelelanisiweyo
- Izixhobo zezindlu: I-PA66 GF30, UL94 V-0, CTI >400V
- Izakhono ezenziwe ngokwezifiso: Uphawu lwe-OEM, imibala eyenziwe ngokwezifiso, uqwalaselo oluxutyiweyo, uphawu olukhethekileyo
Zonke iibhloko zesiphelo esinzima esizithumelayo zivavanywa ngombane nge-100% — ukumelana ne-dielectric kwi-voltage elinganisiweyo ye-2× + 1000V, umlinganiselo wokumelana nokuqhagamshelana kwindawo nganye yesiphelo, kunye nokuhlolwa okubonakalayo phantsi kokwandiswa kwe-10×. Lo asingomgangatho weshishini; ngumgangatho wethu. Siwamkele kuba ixabiso lokusilela kweshishini - ngokwegama, ukuthembana kwabathengi, kunye nemali yokwenyani - lincinci kunexabiso lovavanyo.
📞 Fumana iKoteshini okanye ucele iisampuli zobuNjineli
Sinikezela ngeesampulu zobunjineli zasimahla kunye namaxwebhu ovavanyo apheleleyo kwiiyure ezingama-48. Nxibelelana neqela lethu ku- sara@nbjguang.com okanye utsalele umnxeba +86 574 63085228.
Khangela uluhlu lwethu olupheleleyo lweemveliso apha: I-NINGBO J-GUANG ELECTRONICS — iibhloko zesiphelo esinzima, iibhloko zesiphelo sesitimela se-DIN, izihlanganisi ze-PCB, kunye nezisombululo zoqhagamshelo olupheleleyo.