Kodi Chingwe Chotetezeka Chamkati ndi Chiyani?
Kodi Chingwe Chotetezeka Chamkati ndi Chiyani?
M'mafakitale monga kuyeretsa mafuta, kukonza mankhwala, ndi migodi, mpweya uli ndi mpweya woyaka, nthunzi, kapena fumbi. M'madera oopsa awa, mphamvu yamagetsi yochokera ku chingwe cha chipangizo chowonongeka ingayambitse kuphulika kwakukulu.
AnChingwe cha chida chotetezeka mkati (IS)ndiye yankho. Mosiyana ndi zingwe kapena machubu achikhalidwe osaphulika (Ex-d) omwe amayesa kuletsa kuphulika mkati mwa mpanda wotsekedwa, chingwe cha IS chimaletsa kuphulikako kwathunthu poonetsetsa kuti mphamvu yamagetsi yodutsa mu waya ndi yolondola.sizikwera mokwanira kuti zipange chezazomwe zingayatse mlengalenga.
Bukuli likufotokoza momwe zingwe za IS zimagwirira ntchito, zofunikira pakupanga, magawo ofunikira amagetsi, ndi momwe mungawadziwitsire molondola pa malo anu oopsa.
- Tanthauzo ndi Mfundo Yogwirira Ntchito
Muyezo wapadziko lonse lapansiIEC 60079-11Amatanthauzira chitetezo chamkati ngati njira yotetezera yozikidwa pa mfundo yochepetsera mphamvu.
Tanthauzo Lovomerezeka:Dera lotetezeka mwachibadwa ndi limodzi"momwe mphamvu iliyonse ya kutentha kapena cheza sichingayambitse kuyaka kwa zinthu zoyaka kapena zoyaka mumlengalenga motsatira miyezo yovomerezeka."
(Chotetezeka Mwachilengedwe vs. Chosaphulika: IS imaletsa kuyaka mwa kuchepetsa mphamvu (IEC 60079-11) pomwe Ex-d ili ndi kuphulika mkati mwa malo otsekedwa)
Momwe Zimagwirira Ntchito:
- Kuletsa (Kupatula d):Pangani bokosi lachitsulo cholemera lolimba mokwanira kuti liteteze kuphulika kwa mkati.
- Kupewa (Ex-i / IS):Chepetsani mphamvu ya magetsi, mphamvu yamagetsi, ndi mphamvu yolowera m'dera loopsa kwambiri moti ngakhale circuit yochepa imapangapalibe mphezindipalibe mphamvu ya kutenthawokhoza kuyatsa moto.
Pa Dingzun Cable,Timapanga zingwe za zida za IS zopangidwa kuti zisunge mphamvu zokhwima ngakhale zitakhala kuti zili ndi vuto, kuonetsetsa kuti zida zanu zowopsa zimakhala zotetezeka.
- Zofunikira Zofunikira pa Zingwe za Zipangizo za IS (Malinga ndi IEC 60079-14)
Si zingwe zonse zomwe zingagwiritsidwe ntchito mu dongosolo lotetezeka mwachibadwa. Zingwe za IS zili ndi zofunikira zinazake zomangira ndi kuzizindikira kuti zitsimikizire kuti dongosololi ndi lolondola.
Gome 1: Zofunikira pa Chingwe cha Zipangizo cha IS
| Chofunikira | Kufotokozera | Muyezo Woyambira | Chifukwa Chake Ndi Chofunika |
| Kuchepa kwa Mphamvu | Ayenera kukhala kutali ndi ma circuits omwe si a IS | IEC 60079-14 | Zimaletsa kusamuka kwa mphamvu zoopsa kupita kudera loopsa |
| Kuteteza | Chofunika (chojambula kapena choluka) kuti tipewe kulumikizana kwa EMI | Gawo la NFPA 70 504.30 | Zimaletsa kusokoneza kwa ma frequency a wailesi komwe kungayambitse magetsi |
| Kulamulira kwa Inductance (Lc) | Ziyenera kulembedwa (µH/m2) | IEC 60079-14 | Zimaletsa kukwera kwa magetsi pamene mabwalo atsegulidwa |
| Kulamulira Mphamvu (Cc) | Ziyenera kulembedwa (nF/km) | IEC 60079-14 | Kuchepetsa ndalama zosungidwa zomwe zingatuluke ngati spark |
| Chitetezo cha Makina | Chidebe cholimba (PUR kapena LSZH) | IEC 60092-502 | Imapulumuka malo ovuta a mafakitale |
| Kudziwika | Chikwama chakunja cha buluu wopepuka (RAL 5015) | Muyezo wapadziko lonse (IEC 60079-14) | Kuzindikira mwachangu maso kumalepheretsa kulumikizana mwangozi ndi mphamvu yosakhala ya IS |
| Woyendetsa | Mkuwa wopindika(Kalasi 5 kapena 6) | IEEE 1580 | Kusinthasintha kwa kukhazikitsa ndi kukana kugwedezeka |
Chidziwitso Chofunika Kwambiri Pa Kuzindikira:IEC 60079-14 imafuna kuti ma circuit otetezeka azitha kuzindikirika ndimtundu wabuluu wopepuka(RAL 5015). Ngati chingwe cha chingwe chili chakuda, ndiye kuti chili chakuda.osatizogwirizana ndi mapulogalamu a IS.
- Kuzama Kwambiri: Zofunikira Zoteteza Ma Cable a IS
Kuteteza sikofunikira pa zingwe za zida za IS—ndikofunikira malinga ndi NFPA 70 Gawo 504.30. Koma chifukwa chiyani?
Vutolo:Mu mafakitale, ma Variable Frequency Drives (VFDs), ma radio transmitters, ndi zida zowotcherera zimapanga electromagnetic interference (EMI). EMI iyi imathakuyambitsa magetsi ndi magetsipa chingwe chaching'ono choyendera nthawi yayitali. Ngakhale chotchingacho chikachepetsa mphamvu kufika pa 1.2W, chotumizira wailesi chapafupi chingapangitse mphamvu yokwanira pa chingwe chosatetezedwa kuti chipange mphamvu yoyatsira moto.
Yankho:Achishango (cholukidwa kapena chopangidwa ndi foil)Imaphimba mawiri onyamula zizindikiro. Imagwira ntchito ngati khola la Faraday, kutulutsa phokoso lochokera pansi mosamala (pamalo amodzi) isanafike pa sensor ya malo oopsa.
(Gawo lodutsa chingwe chovomerezeka cha Intrinsically Safe chomwe chili ndi ma conductors amkuwa otsekedwa, PE/XLPE low-capacitance insulation, chophimba cha mkuwa chonse, ndi chivundikiro cha buluu chofunikira malinga ndi IEC 60079-14)
Gome 2: Mitundu Yotetezera Zingwe za IS Instrument
| Mtundu wa Chishango | Kuphimba | Ntchito Yabwino Kwambiri | Kuyenerera kwa IS |
| Chishango cha Zojambulazo | 100% | Kukhazikitsa kosasinthika, EMI yapamwamba kwambiri | Yovomerezeka pa kuthamanga kwaufupi komanso kosasinthasintha |
| Chishango Cholukidwa | 70-95% | Mapulogalamu osinthasintha/osinthasintha, EMI yotsika pafupipafupi | Akulimbikitsidwa kugwiritsa ntchito migodi, maloboti, ndi zida zoyendera |
| Chosakaniza (Foil + Luid) | 100% + kuluka | Mafakitale ovuta, EMI yapamwamba | Zabwino kwambiri pa mafakitale oyeretsera zinthu, mafakitale a mankhwala, ndi malo opangira magetsi |
Lamulo Loyambira la Zishango za IS:Chishango chiyenera kukhazikika pansi pamfundo imodzi yokha(nthawi zambiri pamalo otetezeka pa chotchinga) kuti apewe kuzungulira kwa nthaka komwe kungabweretse mphamvu zoopsa.
Pa Dingzun Cable,Zingwe zathu za zida za IS zimakhala ndi mawonekedwechitetezo cha mkuwa chokulungidwa m'chitini (≥85% ya kuphimba)monga mwachizolowezi, ndi njira zosiyanasiyana zogwirira ntchito m'malo ovuta kwambiri a EMI—kuonetsetsa kuti malo anu oopsa akukhala otetezeka.
- Magawo amagetsi: Capacitance & Inductance
Chingwechi sichimangokhala cholumikizira chokha. Chimasunga mphamvu zamagetsi m'njira ziwiri zomwe zingakhale magwero oyatsira moto pakagwa vuto.
Gome 3: Magawo amagetsi a Critical IS Cable
| Chizindikiro | Chizindikiro | Mayunitsi | Chifukwa Chake Ndi Chofunika Pa Chitetezo Chamkati |
| Kuchuluka kwa Mphamvu (Core-Core) | Cc | nF/km | Masitolo a chingwe amachajidwa ngati batire. Akachotsedwa, chaji iyi imatuluka ngati spark. Cc yapamwamba = mtunda waufupi wotetezeka |
| Kuchuluka kwa Mphamvu (Chophimba Chapakati) | Cc | nF/km | Masitolo amachaja pakati pa kondakitala ndi chishango. Chofunika kwambiri pa zingwe zotetezedwa |
| Kuyendetsa | Lc | µH/m kapena mH/km | Ma circuits oyambitsa magetsi amapanga ma spikes amagetsi akatsegulidwa. Lc yapamwamba = mphamvu yayikulu ya spark |
| Chiŵerengero cha L/R | L/R | µH/Ω | Imatanthauzira nthawi yokhazikika ya dera. Yogwiritsidwa ntchito ndi BS 6704 pa zingwe zamigodi |
Zotsatira Zothandiza:Ngati mugwiritsa ntchito chingwe chokhazikika, chokhala ndi mphamvu zambiri (waya wotsika wa PVC-insulated) m'malo mwa chingwe chovomerezeka cha IS (chotsika-capacitance PE/XLPE insulation), mphamvu yosungidwa mu chingwecho ikhoza kupitirira chitsimikizo cha chitetezo cha chotchingacho—kusandutsa dongosolo "lotetezeka" kukhala lotha kuphulika, ngakhale ndi chotchinga choyenera.
- Lingaliro la Chigwirizano: Kufananiza Chingwe, Cholepheretsa, ndi Chida
Kuti dongosolo litsimikizidwe kuti ndi Lotetezeka Mwachilengedwe,zigawo zonse zitatu—chotchinga, chingwe, ndi chida chakumunda—ziyenera kukhala ndi magawo amagetsi ogwirizana. Izi zimatchedwaLingaliro la Bungwe.
Gome 4: Magawo a Entity a IS System Verification
| Chigawo | Magawo Ofunika | Kufotokozera |
| Chotchinga (Malo Otetezeka) | Mawu(Voteji yotseguka ya dera),Isc(Mpweya wafupi wa dera),Zimenezo(Kuchuluka kololedwa kwa capacitance),The(Kuchuluka kwa inductance komwe kumaloledwa) | Imafotokoza kuchuluka kwa mphamvu zomwe chotchingacho chingachepetse |
| Chingwe cha IS | Cc(Capacitance ya chingwe/km),Lc(Kulowa kwa chingwe/km) | Iyenera kulembedwa pa datasheet ya chingwe |
| Chida Chakumunda | Apo(Kutha kwa mphamvu mkati),Zimenezo(Kulowa mkati) | Yoperekedwa ndi wopanga zida |
Mafomula Otsimikizira:
- Kuwunika Mphamvu:(Kuchuluka kwa Chingwe × Kutalika) + Kuchuluka kwa Chida ≤ Kuchuluka kwa Chotchinga ((Cc × L) + Ci ≤ Ca)
- Kuwunika kwa Inductance:(Kulowa kwa Chingwe × Kutalika) + Kulowa kwa Chida ≤ Kulowa kwa Chotchinga ((Lc × L) + Li ≤ La)
Kutanthauza Kofunika Kwambiri:Ngati wopanga chingwe saperekaCcndiLcMakhalidwe ake, chingwecho sichingagwiritsidwe ntchito mu dongosolo lovomerezeka la IS. Ichi ndichifukwa chake kugwiritsa ntchito "chingwe chilichonse chotetezedwa" ndikoopsa komanso kosatsatira malamulo.
Pa Dingzun Cable,timaperekamagawo ovomerezeka a Lc ndi Ccndi kutumiza kulikonse kwa chingwe cha IS, zomwe zimakupatsani mwayi wochita mawerengedwe olondola a bungwe ndikusunga kutsatira malamulo a malo oopsa.
- Ex-ia vs. Ex-ib: Miyezo ya Chitetezo Chamkati
Ma circuits a IS amagawidwanso m'magulu malinga ndi kulekerera kwawo zolakwika ndi malo ololedwa okhazikitsa.
Gome 5: Kuwerengera kwa Ex-ia vs. Ex-ib kwa Zingwe za Zipangizo
| Mlingo | Kulekerera Zolakwa | Malo Oyenera | Kugwiritsa Ntchito Zida Zachizolowezi |
| Kuyambira pano kupita mtsogolo | Zolakwa ziwiri zodziyimira pawokha | Gawo 0(Chiwopsezo chopitirira muyeso) | Zowunikira mpweya wa methane, zowunikira mpweya |
| Wakale | Cholakwika chimodzi | Gawo 1(Chiwopsezo choopsa kwambiri) | Zotumizira kuthamanga, masensa otenthetsera, zoyezera kuyenda kwa mpweya |
Zotsatira pa Kusankha Chingwe:Ma circuit a Ex-ia amafuna malire okhwima kwambiri pa ma parameter a L/C a chingwe kuposa Ex-ib kuti atsimikizire chitetezo pansi pa mikhalidwe ya zolakwika ziwiri. Nthawi zonse onetsetsani mulingo wofunikira wa IS musanatchule chingwe.
- Zofunikira pa Kapangidwe ka Zingwe za IS Instrument
Tebulo 6: Mafotokozedwe a Kapangidwe ka Chingwe cha Zipangizo za IS
| Chigawo | Chofunikira cha IS | Chifukwa chiyani |
| Woyendetsa | Mkuwa wopindika(Kalasi 5 kapena 6, 7 mpaka 19) | Kusinthasintha kwa kukhazikitsa ndi kukana kugwedezeka |
| Zinthu Zoyendetsera Kondakitala | Mkuwa wopangidwa mu chitini(yolangizidwa kwa mafakitale) | Kukana dzimbiri mumlengalenga woopsa |
| Kuteteza kutentha | PE (Polyethylene)kapenaXLPE | Chokhazikika cha dielectric chochepa (εᵣ=2.3) = mphamvu yochepa = mtunda wautali wotetezeka |
| Kuzindikiritsa Awiri | Buluu/Chakuda (chokhazikika) kapena cholembedwa manambala | Zimaletsa zolakwika za waya |
| Kuteteza | Luki ya mkuwa yonse yokhala ndi chitini(≥85% ya kufalikira) | Zimaletsa EMI yomwe ingayambitse mphamvu zoyatsira moto |
| Waya Wokhetsera | Zikuphatikizidwa(mkuwa wopangidwa mu chitini) | Kumachepetsa kutha kwa chishango |
| Jekete lamkati | LSZH kapena PVC | Zimawonjezera chitetezo cha makina |
| Chigoba chakunja | Buluu Wopepuka (RAL 5015), LSZH kapena PUR | Chowonera chimazindikira dera la IS; LSZH yoteteza moto, PUR yoteteza mafuta/kutupa |
| Kuchuluka kwa Kutentha | -40°C mpaka +90°C (muyezo); -65°C mpaka +200°C (premium FEP) | Imapulumuka nyengo zovuta kwambiri za zomera |
- Malamulo Okhazikitsa Zingwe za IS Instrument
Ngakhale chingwe chabwino kwambiri cha IS chingalephereke ngati chitayikidwa molakwika.
Tebulo 7: Zofunikira pa Kukhazikitsa Chingwe cha IS (IEC 60079-14)
| Lamulo | Chofunikira | Chifukwa chiyani |
| Kulekana | Ma circuits a IS ayenera kukhalakulekanitsidwa mwakuthupikuchokera ku ma circuits omwe si a IS | Zimaletsa kufalikira kwa mphamvu zoopsa |
| Mtunda Wopatukana | ≥50mm (mainchesi awiri) kuchokera ku zingwe zosakhala za IS (kapena kudzera mu cholekanitsa chitsulo chokhazikika) | Zimalepheretsa kulumikizana kwa inductive/capacitive |
| Kuzindikiritsa Malo Osungira Zinthu | Gwiritsani ntchitomalo otsetsereka abuluu wowalakapena manja | Kuwunika chitetezo cha maso kwa ogwira ntchito yokonza zinthu |
| Machitidwe a Ngalande | Ngati mugwiritsa ntchito njira yolumikizirana ndi anthu omwe si a IS, njira yolumikizirana iyenera kukhalabuluu wopepukakapena zolembedwa | Zimaletsa kusakaniza mwangozi panthawi yokoka |
| Palibe Ma Splices | Pewani kulumikiza zingwe; gwiritsani ntchito chingwe chopitilira | Ma splices amapanga magawo osadziwika amagetsi |
| Kuyika pansi | Chishango chakhazikika pansi pamfundo imodzi yokha(malo otetezeka) | Zimaletsa kuzungulira kwa nthaka komwe kungayambitse mphamvu zoopsa |
- Mapulogalamu Ofunika Zingwe za Chida cha IS
Zingwe za zida za IS ndizofunikira pa ma circuits onse opanda mphamvu zambiri omwe amalowa m'malo oopsa.
(Kukhazikitsa chingwe cha zida zotetezeka mwachilengedwe (IS))
Gome 8: Kugwiritsa Ntchito Chingwe cha Zipangizo za IS Malinga ndi Makampani
| Makampani | Malo Oopsa | Mapulogalamu Odziwika a IS |
| Mafuta ndi Gasi | Chigawo 1/2 (mitunda ya zitsime, nsanja) | Zotumizira mpweya, zoyezera kuthamanga kwa magazi, zoyezera mpweya, ma RTD |
| Kukonza Mankhwala | Gawo 1 (ma reactor, matanki osungiramo zinthu) | Masensa a pH, ma probe a kutentha, ma switch a level |
| Mankhwala | Gawo 1 (kusamalira zosungunulira) | Zida zowongolera magulu, masensa oyeretsa chipinda |
| Migodi (Malasha) | Chigawo 0/1 (pansi pa nthaka) | Zozindikira za Methane, nyali zophimba, zowunikira pafupi |
| Madzi otayira | Gawo 1 (nyumba zosungiramo zinthu) | Oyang'anira a Methane, owunikira mpweya |
| Malo Opaka Utoto/Opopera | Gawo 1 | Zosewerera mpweya wabwino, zowunikira kutentha |
Zokhudza Dingzun Cable: Mnzanu Wopanga Chingwe cha IS Instrument
NdiZaka 20+ zogwira ntchito yapadera yopanga zinthu,Chingwe cha Dingzunndi mnzawo wodalirika wa mapulojekiti apadziko lonse lapansi a mphamvu, mankhwala, ndi migodi omwe amafunika satifiketiZingwe za zida zotetezeka mkatiTimaphatikiza ukatswiri wa malo oopsa kwambiri ndikusintha kwakukulukuti mupereke zingwe zomwe zikukwaniritsa zofunikira zenizeni za IS ndi magawo a bungwe lanu.
(Chingwe cha Dingzun Cable Intrinsically Safe — chovomerezeka ndi IEC 60079-11 kuti chigwiritsidwe ntchito pa malo oopsa)
Mphamvu Zathu za Chingwe cha IS Instrument:
| Kutha | Mafotokozedwe a Dingzun |
| Kutsatira malamulo | IEC 60079-11, IEC 60079-14, NFPA 70, IEEE 1580 |
| Mavoti a IS | Kuyambira pano kupita mtsogolo(Zone 0) ndiWakale(Gawo 1) |
| Woyendetsa | Mkuwa wopangidwa ndi zitini (Kalasi 5/6, 18-24 AWG) |
| Kuteteza kutentha | PE kapena XLPE(Kuchepa kwa mphamvu ≤150 nF/km) |
| Kuteteza | Luki ya mkuwa yonse yokhala ndi chitini(≥85% ya kufalikira, yoyesedwa) |
| Waya Wokhetsera | Yaphatikizidwa kuti ikhazikike mosavuta |
| Mtundu wa Chigoba | Buluu Wopepuka (RAL 5015)—zofunikira malinga ndi IEC 60079-14 |
| Zofunika pa Chidebe | LSZH (chitetezo chamoto), PUR (mafuta / abrasion), PVC (yambiri) |
| Magawo amagetsi | Lc Yovomerezeka (µH/m) ndi Cc (nF/km)zoperekedwa powerengera mabungwe |
| Kuchuluka kwa Kutentha | -40°C mpaka +90°C (muyezo); -65°C mpaka +200°C (premium FEP) |
| Kuyesa | Kuyesa kwamagetsi 100%pa reel iliyonse |
Chifukwa Chake Chingwe cha Dingzun Chogwiritsira Ntchito Zida Zanu Zoopsa:
- Kusintha kwakukulu— Chiwerengero cha awiriawiri (1 mpaka 100+), choyezera cha conductor, kuchuluka kwa zotchingira, zinthu zomangira m'chimake—zonsezi zimagwirizana ndi pulogalamu yanu ya IS
- Gulu la akatswiri aukadaulo— Chithandizo cha kuwerengera magawo a entity (Ca/La matching) kuti zitsimikizire kuti chotchinga chikugwirizana
- Kulankhulana mwachindunji ndi akatswiri— Ma quotes ofulumira, ma datasheet athunthu aukadaulo okhala ndi ma Lc/Cc values, ndi kutumiza padziko lonse lapansi
- Zolemba zonse— Malipoti a mayeso, zikalata zosonyeza kuti munthu akutsatira malamulo, komanso kutsata zomwe zatumizidwa
Mukufuna chingwe chovomerezeka cha IS kuti muyike malo anu owopsa?[Lumikizanani ndi gulu lathu laukadaulo lero kuti mukambirane kapena kuti mupereke chitsanzo chanu].