TL;DR — Zimene Muyenera Kudziwa
- Ma block a terminal olemera omwe ali ndi 150A okhala ndi waya wa 35mm² (AWG 2) wovomerezeka ndi muyezo wa kugawa mphamvu pakati pa malo owongolera mota — zomwe zimapereka malo olumikizira otetezeka komanso okonzedwa bwino a zingwe zodyetsa mota mpaka 50mm².
- Mafunde olowera mu injini (6-8× FLA) amafuna ma block a terminal okhala ndi kutentha kwakukulu — ma blocks olamulira okhazikika omwe ali ndi ma volti ofanana ndi omwewo adzalephera pansi pa ntchito za MCC chifukwa alibe gawo la mkuwa loti lizitha kuyamwa mphamvu yolowera.
- Malo okoma a 35mm² (AWG 2) sichosankha: chimagwirizanitsa bwino kukula kwa magetsi (150A ndi 25% chitetezo cha magetsi pa 40°C), kusinthasintha kwa waya wamakina (kupindika kwa radius
- Molunjika kuchokera ku fakitale yathu, ma block olemera amawononga ndalama zochepa ndi 35-50% poyerekeza ndi mitundu yofanana ya ku Europe yotsimikiziridwa ndi IEC/UL — ndi nthawi yotsogolera ya masabata awiri kapena atatu pazinthu zodziwika bwino za katalogu.
- Kugwirizana kwa SCCR ndiye chiopsezo chachikulu pakutsata malamulo pakusankha MCC terminal block — nthawi zonse onetsetsani kuti mphamvu yamagetsi ya terminal block ikugwirizana ndi SCCR yonse ya MCC (nthawi zambiri 42kA mpaka 65kA pazida zamakono).
Kodi Chigawo Cholimba Chogwiritsira Ntchito Malo Oyendetsera Magalimoto Chimatanthauza Chiyani?
Ndiloleni ndinene momveka bwino tanthauzo la "ntchito yolemetsa" — chifukwa mawuwa amangogwiritsidwa ntchito molakwika mumakampani awa. Chipika cholemera, malinga ndi tanthauzo lililonse, ndi chomwe chapangidwira kuti chikhale ndi mphamvu yopitilira ya 100A mpaka 400A, yokhala ndi ma waya oyambira pa 10mm² (AWG 8) ndikufikira 150mm² (300 kcmil). Izi si ma block a terminal omwe mumagwiritsa ntchito polumikizira PLC I/O kapena ma lupu a zida za 4-20mA. Izi ndi ma block omwe amakhala pakati pa basi yayikulu ya MCC ndi mayunitsi oyambira a mota imodzi - omwe ali ndi mphamvu yokwanira yoyendetsera mota yoyambira ya 75kW (100 HP).
Ku fakitale yathu, timalemba mzere womveka bwino: Ngati chipika cha terminal chikugwira ntchito ndi mphamvu yodyetsa injini — osati mphamvu yowongolera, osati mawaya a chizindikiro, koma mphamvu yeniyeni ya magawo atatu yomwe imazungulira mota — imagwera m'gulu lathu la zinthu zolemera. Mzerewu ulipo pazifukwa zenizeni zaukadaulo: ma motor circuits amakhala ndi mphamvu zamagetsi zitatu zomwe ma control circuits samachita, ndipo kapangidwe ka terminal block kayenera kuwerengera zonse zitatu nthawi imodzi.
Chifukwa Chake Malo Oyendetsera Magalimoto Amafuna Ma Terminal Blocks Osiyanasiyana
Malo owongolera magalimoto, ponena za magetsi, ndi amodzi mwa malo ovuta kwambiri olumikizira ma terminal block. Ndinaphunzira phunziro ili mu 2012 pamene m'modzi mwa makasitomala athu oyambirira adanena kuti MCC yalephera kugwira ntchito patatha miyezi isanu ndi itatu yokha - mabuloko omwe adapambana mayeso onse a fakitale ndi mitundu yosiyanasiyana. Titayendetsa mainjiniya athu kupita kumalo osungira magalimoto ku Michigan, tinapeza vutoli mkati mwa mphindi 15: Ma block a terminal anali okwanira bwino kugwiritsa ntchito 120A yokhazikika, koma anali kuchitiridwa 720A inrush spikes kasanu ndi kamodzi pa ola limodzi pamene ma motors opanga anali kuyendetsa ndi kuzima.
Ulendo umodzi umenewo unasintha kwambiri momwe timapangira ndi kuwerengera ma terminal block athu akuluakulu. Izi ndi zomwe malo a MCC amafuna kuti ma terminal blocks wamba asapereke:
Inrush Current: Wakupha Wobisika
Ma injini oyambitsa amakoka mphamvu yamagetsi (FLA) nthawi 6-8 poyambira — injini ya 75kW yokhala ndi 140A FLA imakoka mphamvu yamagetsi ya 840-1120A kwa masekondi pafupifupi 2-5 poyambira. Ngakhale kuti ma soft starter amatha kuletsa kuthamanga kwa 3×FLA, mukuyang'anabe 420A yomwe ikudutsa mu terminal block connection. Popeza ma terminal blocks okhazikika amayesedwa kuti aone ngati kutentha kumayendera bwino pamagetsi okha, osati chifukwa cha kuchuluka kwa nthawi yochepa, gawo lawo la mkuwa silikhala ndi mphamvu yokwanira yoyamwa mphamvu yolowera popanda kupitirira kutentha kofewa kwa nyumba ya PA66.
Kugwedezeka: Chomasula Cholumikizira
Ma MCC ali ndi ma contactor amagetsi omwe amatseka ndikutsegula kambirimbiri patsiku. Ntchito iliyonse ya contactor imatumiza kugwedezeka kwa makina kudzera mu kapangidwe konse koyima - ndipo chipika chilichonse chomangira chomwe chili pa kapangidwe kameneko chimachimva. Mabuloko okhazikika a screw terminal okhala ndi torque yomangika ya 1.2-1.5 Nm adzamasuka pang'onopang'ono pansi pa kugwedezeka kumeneku. Mabuloko olemera amagwiritsa ntchito ma screw achitsulo a M5 kapena M6 okhala ndi torque ya 2.5-5.0 Nm, ndipo mawonekedwe a screw amaphatikizapo mawonekedwe odzitsekera okha (conical spring washer kapena serrated contact surface) omwe amaletsa kuzungulira pansi pa kugwedezeka.
Malo Ocheperako ndi Kutentha Kwambiri
Magawo ozungulira a MCC ali odzaza kwambiri: mabasi, ma circuit breakers, ma contactor, ma overload relay, ma control transformers, ndi ma terminal blocks onse amapikisana kuti apeze malo mu NEMA 1 kapena NEMA 12 enclosure. Kutentha kwa malo mkati mwa MCC yogwira ntchito nthawi zonse kumafika 50-55°C — 10-15°C kuposa muyezo wa 40°C wa ma terminal blocks. Pa kutentha kwa 55°C, mphamvu yamagetsi ya block ya terminal iyenera kuchepetsedwa ndi 12-15%, zomwe zikutanthauza kuti mphamvu ya 150A nameplate imakhala mphamvu yokhazikika ya 128-132A. Ma block olemera okhala ndi mipiringidzo yayikulu yamkuwa amasunga mphamvu yayikulu ya kutentha pamlingo womwewo.
Ma waya a 35mm² (AWG 2): Chifukwa Chake Iyi Ndi Muyezo wa MCC
Kondakitala wa 35mm² ali pamalo olumikizirana a zopinga zitatu zaukadaulo zomwe zimalumikizana popanga malo owongolera magalimoto. Si nambala yongochitika mwachisawawa — ndi zotsatira za kukulitsa kukula kwa ntchito, kuyendetsa bwino makina, ndi mtengo wake.
| Chizindikiro | 25mm² (AWG 4) | 35mm² (AWG 2) | 50mm² (AWG 1/0) |
|---|---|---|---|
| Kuchuluka kwa mphamvu pa 40°C (mkuwa, 3-conductor mu mkondo) | 110A | 145A | 170A |
| Ampacity pa 55 ° C (MCC mkati, derated) | 93A | 123A | 144A |
| Malire a chitetezo pamwamba pa 150A block rating | -26% ❌ | +21% ✅ | +42% (wamkulu kwambiri) |
| Chingwe chakunja kwa m'mimba mwake (XLPE yotetezedwa) | ~14mm | ~16mm | ~19mm |
| Utali wocheperako wopindika (pa NEC) | ~98mm | ~112mm | ~133mm |
| Mtengo pa mita imodzi (woyerekeza) | 0.75× | 1.00× | 1.40× |
Tebulo limafotokoza nkhaniyi momveka bwino: 35mm² ndiye chowongolera cha goldilocks cha ma circuits a mota a 150A. Chingwe cha 25mm² sichimakula kwambiri pa 150A pa kutentha kwa MCC kokwera — mungadalire malire a kutentha a terminal block kuti agwirizane ndi kondakitala wocheperako, zomwe ndi njira yolakwika yaukadaulo. Chingwe cha 50mm² ndi chotetezeka koma chachikulu kwambiri — chimawononga ndalama zochulukirapo ndi 40%, chimafuna malo ochulukirapo kuti chipinde, ndipo sichimakupindulitsani chilichonse pakugwira ntchito kwamagetsi chifukwa terminal block yokha ndiyo yoletsa pa 150A.
Ukadaulo Wolumikizirana wa Ntchito Zolemera
Mukatseka chingwe chodyetsera mota cha 35mm² mkati mwa MCC, Ukadaulo wolumikizira ndi wofunika kwambiri monga momwe chiwerengero cha terminal block chimakhalira. Timapanga mitundu inayi yolumikizirana ya mzere wathu wolemera wazinthu, ndipo iliyonse ili ndi mtundu wake wogwiritsira ntchito:
Kulumikiza kwa Stud/Bolt (Koyenera pa ≥35mm²)
Chitsulo chachitsulo cha M6 kapena M8 chokhala ndi ulusi wokhala ndi hex nut ndi makina ochapira a spring chimalandira ma terminal a mphete opindika. Uwu ndiye upangiri wathu wamphamvu kwambiri kwa kondakitala iliyonse ya 35mm² ndi kupitirira apo, makamaka pazolumikizira za mbali ya mzere (zolowera) mu mapulogalamu a MCC. Zifukwa zake n'zomveka: cholumikizira cha mphete chimapereka kukhudzana kwa madigiri 360 mozungulira stud, kulumikizana kwa makina sikugwedezeka ngati kwakonzedwa bwino, ndipo - makamaka pakukonza - Cholumikizira cha mphete chingadulidwe ndikulumikizidwanso kangapo popanda kuwononga kondakitala, zomwe ndizofunikira kwambiri pamene mabaketi a MCC akufunika kusinthidwa panthawi yokonzanso mzere wopanga.
Chotsekera cha Power Screw (Cha 10-35mm²)
Sikuluu yachitsulo ya M5 kapena M6 imayendetsa mbale yokakamiza yomwe imakanikiza kondakitala motsutsana ndi bala lamagetsi la mkuwa. Uwu ndi mtundu wathu wodziwika kwambiri wolumikizira ma terminals a injini omwe ali pamtunda wa 10-35mm² chifukwa umaphatikiza kuyika mwachangu (pansi pa masekondi 30 pa waya uliwonse ndi screwdriver yoyendetsedwa ndi magetsi) komanso kudalirika kwabwino kwa nthawi yayitali. Chokulungiracho chimagwiritsa ntchito mphamvu ya 3.0-4.0 Nm — yokwanira kulumikiza ulusi wa kondakitala pamalo olumikizirana ndi mkuwa omwe ali ndi tin, ndikupanga kulumikizana kosagwira mpweya komwe kumalimbana ndi okosijeni ndi kuwonongeka kwa kutentha.
Chotsekera cha Bokosi/Saddle (Cha 16-50mm², Mitundu Yosakanikirana ya Kondakitala)
Chomangira cha mpando chooneka ngati U chokhala ndi zomangira ziwiri chimapereka chomangira chodziyimira pawokha mbali zonse ziwiri za kondakitala. Kapangidwe kameneka n'kofunika kwambiri pothetsa ma lead a injini ya aluminiyamu pamodzi ndi zingwe zodyetsera zamkuwa — chifukwa zimagwirizana ndi ma coefficients osiyanasiyana a kutentha kwa aluminiyamu (23×10⁻⁶/K) poyerekeza ndi mkuwa (17×10⁻⁶/K) popanda kupanga malo otentha pamalo olumikizirana.
Ma Stud Blocks Ogawa Mphamvu (Pa Main Basi Connections)
Izi ndi mabuloko athu akuluakulu, okhala ndi ma stud a M10 kapena M12 omwe ali ndi ulusi wa 250-400A. Amagwiritsidwa ntchito pomwe busbar yoyimirira ya MCC imalumikizana ndi zingwe zotumizira zomwe zikubwera - malo oyamba olumikizirana pakati pa injini. Pa mulingo wamakono uwu, chipika cha terminal chimakhala gawo la kapangidwe kake, osati cholumikizira chamagetsi chokha - mphamvu zamakina zochokera ku kupindika kwa chingwe cha 150mm² ziyenera kuthandizidwa ndi nyumba ya chipika cha terminal ndi choyikira chake cha DIN, osati ndi stud yamkuwa yokha.
Ziphaso: Zomwe MCC Yanu Idzafuna
Mafotokozedwe a malo oyendetsera magalimoto ndi omveka bwino pankhani ya zofunikira pa satifiketi ya terminal block. Ngati mfundozo zikufuna zida za MCC zomwe zili m'ndandanda wa UL 845 (monga momwe zimachitira pafupifupi makampani onse a ku North America a MCC), ndiye kuti gawo lililonse mkati - kuphatikizapo ma terminal block - liyenera kukhala ndi chizindikiro choyenera cha UL.
Pa ma terminal block olemera mu ntchito za MCC, ziphaso zofunika ndi izi:
UL 1059 (Muyezo wa Ma Terminal Blocks) — imaphimba ma terminal blocks omwe ali ndi ma terminal blocks okwana 1500V. UL 1059 Mkonzi. 6-2024, ma terminal blocks ayenera kuyesedwa kuti awone ngati ali ndi dielectric standing, kutentha kukwera pa rated current, ndi short-circuit current standing. Ma block athu olemera omwe ali pa mndandanda wa UL ali ndi ma rating a SCCR kuyambira 10kA mpaka 65kA kutengera kulumikizana kwa chipangizo choteteza cham'mwamba - ndipo timapereka matebulo ogwirizanitsa a SCCR mu datasheet iliyonse yazinthu.
CSA C22.2 Nambala 158 — chofanana ndi cha ku Canada, chofunikira pa ma MCC omwe aikidwa ku Canada. Kuyesa kwa CSA kumawonjezera mayeso ozizira pa -35°C omwe UL siifuna, zomwe ndizofunikira pa kukhazikitsa ma MCC akunja m'nyengo yakumpoto.
IEC 60947-7-1 — muyezo wapadziko lonse lapansi. Pa kusintha kwaposachedwa, ma block a terminal ayenera kulengeza momveka bwino kuti current yokhazikika nthawi yochepa (Icw) ndi mphamvu yomwe block ingathe kunyamula kwa sekondi imodzi popanda kuwonongeka. Pa block yolemera ya 150A, mtengo wa Icw nthawi zambiri umakhala pakati pa 3.0kA ndi 4.5kA (sekondi imodzi), zomwe ziyenera kugwirizanitsidwa ndi mphamvu ya MCC yotulutsa ma circuit breaker yomwe imayendetsa magetsi.
Kusankha Wogulitsa Malo Olemera Kwambiri: Chomwe Chimasiyanitsa Ubwino ndi Kusagwirizana
Ndikufuna kukamba nkhaniyi momveka bwino chifukwa Msika wa terminal block wadzaza ndi ogulitsa omwe akupereka zinthu zomwe zimawoneka zofanana muzithunzi za katalogi koma zimagwira ntchito mosiyana kwambiri pansi pa mikhalidwe yeniyeni ya MCC.
Apa ndi zomwe taphunzira kusiyanitsa malo osungira katundu olemera ndi katundu - ndi zomwe muyenera kuzitsimikizira mukamayesa chilichonse wogulitsa zinthu zolemera zogulira malo osungira katundu:
1. Chitsimikizo cha kuyera kwa mkuwa. Busbar yeniyeni ya mkuwa ya C11000 yokhala ndi zikalata zosonyeza kuti yachokera ku fakitale yoyeretsera mkuwa. Mkuwa wonyenga kapena wobwezerezedwanso — womwe umapezeka kwambiri m'maboloko otsika mtengo — uli ndi zinthu zosafunika (makamaka chitsulo ndi mpweya) zomwe zimachepetsa mphamvu ya mpweya ndi 5-15% ndikupanga malo otentha m'malire a tirigu. Timapereka satifiketi yoyesera mphero pa gulu lililonse la mkuwa lomwe limagwiritsidwa ntchito pantchito yathu yolemera.
2. Kukhuthala kwa chidebe cha zitini. Chophimba cha chitsulo pa busbar ya mkuwa chimagwira ntchito ziwiri: chimaletsa kukhuthala kwa mkuwa (komwe kumawonjezera kukana kukhudzana pakapita nthawi), ndipo chimapanga malo ofewa, ogwirizana ndi zomwe zimalumikizana ndi kondakitala mozizira pansi pa mphamvu ya screw. Kukhuthala kwa pulasitala komwe kumayendetsedwa ndi mafakitale ndi 3-5μm; timayika pulasitala mpaka 5-8μm chifukwa 2-3μm yowonjezera imakulitsa zenera loteteza okosijeni kuyambira pafupifupi zaka 5 mpaka zaka 15+ m'malo olamulidwa ndi anthu.
3. Siliva yachitsulo ndi mankhwala otentha. Zomangira zomangira zomwe zili mu terminal block yolemera ziyenera kusunga mphamvu zawo zamakaniko pa kutentha kwa mafunde ambiri kuyambira -40°C mpaka +130°C. Timagwiritsa ntchito zomangira zachitsulo cha kaboni za kalasi 8.8 zokhala ndi zinc-nickel plating ndi chromate conversion coating — kuphatikiza kumeneku kumapereka kukana kwa dzimbiri kwa 5× kwa zomangira zokhazikika za zinc-plated ndipo kumasunga mphamvu yomangirira mu kutentha konse.
4. Kapangidwe ka zinthu za m'nyumba. Nyumba zambiri zosungiramo zinthu zomangira nyumba zimalembedwa kuti "PA66" popanda kufotokoza kuchuluka kwa ulusi wagalasi. Kuchuluka kwa ulusi wagalasi (nthawi zambiri 25% kapena 30%) kumakhudza mwachindunji kukhazikika kwa chipindacho kutentha - pa 130°C, nyumba ya PA66 GF25 imasunga pafupifupi 40% ya mphamvu yake yolimba kutentha kwa chipinda, pomwe PA66 GF30 imasunga 55%. Pa ma block olemera omwe amagwira ntchito pa kutentha kwa MCC kokwera, kusiyana pakati pa GF25 ndi GF30 ndi kusiyana pakati pa nyumba yomwe imasunga ulusi wa screw ndi yomwe siyisunga ulusiwo.
Kuphatikiza Ma Terminal Blocks Olemera Mu Mapangidwe a MCC: Uinjiniya Wothandiza
Popeza ndapereka ma terminal blocks kwa opanga ma MCC ndi omanga ma panel kwa zaka zoposa khumi, nazi mfundo zogwirizanitsa zomwe zimapangitsa kusiyana pakati pa kukhazikitsa koyera ndi vuto lalikulu lothetsa mavuto:
Kukonzekera Malo a Wireway. Magawo ozungulira a MCC nthawi zambiri amakhala ndi m'lifupi mwa waya wa 100-150mm mbali yakumanja. Cholumikizira cha block yolemera yokhala ndi malo 12 pa 15mm pitch chimakhala ndi 180mm ya DIN rail - komanso ma radii opindika a chingwe a ma conductor a 35mm² amawonjezera pafupifupi 110mm mbali iliyonse. Izi zikutanthauza kuti chipika cha malo 12 chimagwiritsa ntchito bwino malo okwana 400mm a waya woyimirira, omwe ayenera kuwerengedwa mu chithunzi cha kapangidwe ka gawo la MCC waya woyamba usanakokedwe.
Kusamalira Kutentha. Cholumikizira cha terminal block cha 150A chokhala ndi malo 8 okhala ndi avareji ya 110A pa malo aliwonse chimapanga pafupifupi 6-8W ya kutentha pa malo aliwonse chifukwa cha kukana kukhudzana ndi kutayika kwa busbar I²R - pafupifupi 50-65W yonse. Mu gawo lotsekedwa la NEMA 12 MCC lopanda mpweya wokakamiza, 65W imeneyo idzakweza kutentha kwa mkati mwa gawolo ndi pafupifupi 5-8°C kuposa mlengalenga mkati mwa maola anayi. Kukwera kowonjezera kwa kutentha kumeneku kuyenera kuwonjezeredwa ku kuwerengera kwa dera lozungulira — kwenikweni, chipika cha 150A mu NEMA 12 MCC yodzaza mokwanira nthawi zambiri chimagwira ntchito bwino ngati chipika cha 135A.
Kulumikiza Mawaya a Terminal Block-to-Starter. Cholakwika chachikulu chomwe timachiwona pa waya ndikugwiritsa ntchito zingwe zoperekera ma mota kuchokera pa terminal block kupita ku choyambira ma mota pogwiritsa ntchito ma jumpers osakula kwambiri. Ngati chipika cha terminal chili ndi 35mm² yolowera ndipo choyambira cha mota chimalandira ma lug a 35mm², jumper pakati pawo iyeneranso kukhala 35mm² — osati 16mm² kapena 25mm² chifukwa chakuti ndi zosavuta kupindika. Chojambulira cha 16mm² mu circuit ya 150A chidzatentha kwambiri ndi 30-40°C kuposa ma conductor a 35mm² mbali zonse ziwiri, zomwe zimapangitsa kuti kutentha kukhale kofooka komwe oyang'anira amaona kuti ndi koyenera.
Mtengo Wonse wa Umwini: Kupitirira Mtengo Wogula
Magulu ogula zinthu amaika patsogolo mtengo wa chipangizocho; mainjiniya okonza zinthu amaika patsogolo kudalirika. Mtengo wonse wa kuwerengera umwini umalumikiza malingaliro awa - ndipo malinga ndi zomwe takumana nazo, ndi mfundo yokhutiritsa kwambiri yogwiritsira ntchito ndalama mu ma block apamwamba a katundu wolemera.
Tiyeni tiwerengere TCO ya malo 20 ogwirira ntchito yolemera mu MCC — kuyerekeza yankho lapamwamba kwambiri la wopanga mwachindunji ndi katundu wolowetsedwa kunja:
| Mtengo Wofunika | Block ya Premium (J-Guang, Direct) | Kutumiza Zinthu Kunja |
|---|---|---|
| Mtengo wogulira wa malo 20 | $48.00 | $28.00 |
| Ntchito yokhazikitsa (maola awiri × $65/ola) | $130.00 | $130.00 |
| Kukonza pachaka (kuyang'aniranso mphamvu ya magetsi, maola 0.5 × $65/ola) | $32.50 | $32.50 |
| Kuthekera kwa kulephera pa moyo wautumiki wa zaka 5 | 0.5% | 3.2% |
| Mtengo pa chochitika chilichonse cholephera (nthawi yopuma + kusinthidwa) | $2,800 | $2,800 |
| Kulephera komwe kukuyembekezeka kumatenga zaka zoposa 5 | $14.00 | $89.60 |
| Chiwerengero cha TCO cha Zaka 5 | $354.50 | $410.10 |
Chogulitsira chapamwambachi chimawononga ndalama zokwana $20 pasadakhale koma chimasunga $55.60 pazaka zisanu - phindu la 2.8× pa ndalama zomwe zayikidwa pang'onopang'ono. Ndipo kuwerengera kumeneku sikukuphatikizapo mtengo wa nthawi yogwira ntchito yopanga zinthu pamene chipika cholephera chikusinthidwa, chomwe pa mzere wopanga zinthu womwe umapanga ndalama zokwana $5,000/ola, chimawonjezera $10,000-20,000 pa chochitika chilichonse cholephera.
Mafunso Ofunsidwa Kawirikawiri
Q: Kodi ma block olemera angagwiritsidwe ntchito pa ma lead a mota zamkuwa ndi aluminiyamu?
Inde — koma kokha ndi mawonekedwe enieni a kapangidwe. Ma conductor a aluminiyamu amafunikira ma terminal block okhala ndi malo olumikizirana amkuwa opakidwa ndi tin kapena siliva komanso njira zolumikizira zomwe zimagwiritsidwa ntchito pa Al/Cu (bimetallic). IEC 60947-7-1, ma terminal blocks omwe amayesedwa kuti azigwira ntchito ndi aluminiyamu ayenera kuyesedwanso kutentha (ma cycle 500 pakati pa 25°C ndi 110°C) chifukwa kuchuluka kwa CTE ya aluminiyamu kumabweretsa kupsinjika kwakukulu pa malo olumikizirana. Mabuloko athu a Al/Cu-rated amagwiritsa ntchito malo olumikizirana okhala ndi serrated ndi mawaya a Belleville spring washers kuti asunge mphamvu yolumikizirana nthawi zonse ngakhale kutentha kwa kondakitala ya aluminiyamu kumawonjezeka mosiyana.
Q: Kodi ma terminal block olemera amafunika kukonza kotani mu ntchito ya MCC?
Kukonzanso ma screw onse omwe akupezeka mosavuta pachaka ndiye chinthu chofunikira kwambiri. Tikulimbikitsanso kuyang'anira kutentha kwa dzuwa (kusanthula kamera ya infrared) panthawi yokonza yotsekedwa pachaka - kukwera kwa kutentha kopitilira 15°C pamwamba pa malo olumikizirana pafupi kumasonyeza kuti pali kulumikizana kolimba komwe kumafunika chisamaliro chachangu. Pa mabuloko omwe ali m'magawo a MCC omwe amagwedezeka kwambiri (omwe ali ndi oyambira onse omwe amayendetsa njinga nthawi zoposa 10 pa ola limodzi), kuwunika kawiri pachaka ndikofunikira.
Q: Kodi ndi mabuloko angati olemera omwe angaikidwe pa njanji imodzi ya DIN mu MCC?
Zinthu zomwe zimalepheretsa kutentha ndi kutaya kutentha, osati malo enieni. Sitima ya DIN ya mita imodzi mu gawo loyima la MCC imatha kunyamula malo 40-50 a ma terminal block olemera pa 20mm pitch. Komabe, ngati ma block onsewo ali ndi mphamvu yamagetsi yofanana, mphamvu ya kutentha yophatikizidwa ikhoza kupitirira mphamvu yachilengedwe ya convection yozizira ya gawolo. Malangizo athu aukadaulo: musapitirire malo olemera 30 pa mita imodzi ya njanji ya DIN pokhapokha ngati gawo la MCC lili ndi mpweya wokwanira — ndipo nthawi zonse patulani magulu a mabuloko amphamvu okhala ndi malo osachepera awiri opanda kanthu kapena mabuloko amphamvu otsika kuti mupange mabuleko a kutentha munjira ya busbar.
Q: Kodi ndikufunika ma terminal block osiyanasiyana a ma VFD-fed motors ndi ma across-the-line motors mu MCC yomweyo?
Inde — ndipo ichi ndi tsatanetsatane womwe nthawi zambiri umanyalanyazidwa. Ma waveform a VFD output ali ndi ma harmonics apamwamba kwambiri (ma frequency osinthasintha a 2-16 kHz) omwe amawonjezera mphamvu ya khungu mu ma conductors amkuwa ndikupanga kutentha kwina kwa I²R mu ma terminal block connections. Malinga ndi mayeso athu, chipika cha terminal cha 150A cholumikizidwa ku VFD output chomwe chikuyenda pa 8kHz switching frequency chiyenera kuchepetsedwa kufika pa 130A (kuchepa kwa 13%) kuti chiwerengere kutentha kowonjezera kwa harmonic. Ngati mukusakaniza VFD ndi zoyambira zonse mu MCC yomweyo, tchulani ma terminal blocks kutengera VFD derating kuti ikhale yogwirizana — kutchula mopitirira muyeso gulu limodzi la ma blocks ndikotsika mtengo kuposa kusunga zinthu ziwiri zosiyana.
Q: Kodi nthawi yotsogolera yokonza ma terminal block olemera ndi yotani?
Pa mzere wathu wamba wazinthu zolemera (80A-400A), zinthu za katalogu zimatumizidwa mkati mwa masiku 5-7 antchito kuchokera ku fakitale yathu ya Ningbo. Makonzedwe apadera — kuwerengera kwa mitengo yosakhala yokhazikika, ma rating osakanikirana amagetsi, kulemba mitundu yapadera, kulemba mwamakonda — kumafuna milungu 2-3 kuphatikiza kuvomerezedwa ndi uinjiniya ndi kuwunika koyamba. Timasunga buffer stock ya ma profiles onse a mkuwa ndi ma mold okhala, kotero makonzedwe apadera amakhala ochepa makamaka chifukwa cha nthawi yopangira ndi kuyesa, osati kupezeka kwa zinthu zopangira. sara@nbjguang.com ndi zofunikira zanu kuti zitheke nthawi yeniyeni yoperekera.
Chifukwa Chake J-Guang Ndi Wogulitsa Wanu Wamphamvu Kwambiri wa Terminal Block
Takhala tikupanga ma terminal blocks kwa zaka 15 — kuyambira mu 2010. Munthawi imeneyo, tatumiza malo opitilira 50 miliyoni a malo oimika magalimoto kwa makasitomala m'maiko opitilira 40. Mzere wathu wazinthu zolemera unapangidwa makamaka poyankha zomwe zidachitika mu 2012 ku Michigan - ndipo chisankho chilichonse chopanga zinthu zathu zaposachedwa chimachokera ku momwe MCC imagwirira ntchito, osati kungoyang'ana momwe mayeso a labotale amagwirira ntchito.
Mphamvu yathu yopangira zinthu zogwirira ntchito zazikulu imaphatikizapo:
- Mavoti apano: 80A, 100A, 125A, 150A, 175A, 200A, 250A, 300A, ndi 400A
- Ma waya osiyanasiyana: 6mm² mpaka 150mm² (AWG 10 mpaka 300 kcmil)
- Mitundu yolumikizira: Stud/bolt (M5-M12), chomangira cha screw chamagetsi, chomangira cha bokosi/chomangira cha saddle
- Ziphaso: UL 1059 yolembedwa, yolembedwa ndi CE, yogwirizana ndi RoHS/REACH, ISO 9001:2008 QMS
- Mavoti a SCCR: 10kA mpaka 65kA yokhala ndi matebulo ogwirizana a zida zotetezera
- Zipangizo za nyumba: PA66 GF30, UL94 V-0, CTI >400V
- Zotheka mwamakonda: Kutsatsa kwa OEM, mitundu yapadera, makonzedwe osakanikirana, zolemba zapadera
Malo aliwonse olemera omwe timatumiza amayesedwa ndi magetsi 100% — dielectric imapirira pa 2 × rated voltage + 1000V, muyeso wa kukana kukhudzana ndi malo aliwonse olumikizirana, ndikuwunika kowoneka pansi pa kukula kwa 10 ×. Iyi si muyezo wa makampani; ndi muyezo wathu. Tinaugwiritsa ntchito chifukwa mtengo wa kulephera kwa ntchito — m'mbiri, m'kudalira makasitomala, komanso m'ndalama zenizeni — ndi wocheperapo mtengo woyesera.
📞 Pezani Mtengo kapena Pemphani Zitsanzo za Uinjiniya
Timapereka zitsanzo zauinjiniya zaulere ndi zikalata zonse zoyeserera mkati mwa maola 48. Lumikizanani ndi gulu lathu pa sara@nbjguang.com kapena imbani +86 574 63085228.
Yang'anani mndandanda wathu wonse wazinthu pa NINGBO J-GUANG ELECTRONICS — ma block a terminal olemera, ma block a DIN rail terminal, zolumikizira za PCB, ndi mayankho onse olumikizirana.