Kodi ma volts 24 ndi otetezeka mkati mwake?
Yankho Lolunjika ndi: Ayi.
Chidule
Voliyumu ya 24V DC/AC imagwiritsidwa ntchito kwambiri mu zida zamafakitale, ma circuits owongolera otsika mphamvu, ndi makina olumikizira mawaya m'mafakitale onse a chingwe. Malingaliro olakwika omwe amapezeka m'makampani ambiri amaona ma circuits onse a 24V ngati otetezeka mwachibadwa (IS) pakugwiritsa ntchito malo oopsa. Nkhaniyi ikufotokoza tanthauzo lalikulu la chitetezo chamkati, ikuwunika ngati voltiyumu ya 24V yokha ikukwaniritsa zofunikira zachitetezo chamkati, ndikufotokozera zinthu zofunika kwambiri, mikhalidwe yoletsa, kusankha chingwe ndi zofunikira pakuyika ma circuits a 24V IS, mogwirizana ndi miyezo ya IEC 60079-11, ATEX ndi GB 3836 yadziko lonse komanso yapadziko lonse lapansi. Imapereka malangizo okhwima aukadaulo pakupanga chingwe, kusankha mitundu ndi kapangidwe kaukadaulo m'malo oopsa ophulika.
1. Tanthauzo Lofunika la Chitetezo Chamkati
Chitetezo chamkati (Exi) ndi njira yotetezeka kwambiri yotetezera kuphulika kwa magetsi opanda mphamvu zambiri. Mfundo yake yaikulu ndi kuchepetsa mphamvu zamagetsi mosamalitsa: pansi pa mikhalidwe yabwinobwino yogwirira ntchito komanso mikhalidwe yodziwika bwino ya vuto limodzi kapena angapo (short circuit, open circuit, component failure), mphamvu yayikulu yomwe imatulutsidwa ndi dera (magetsi amphamvu ndi kutentha) nthawi zonse imakhala yotsika kuposa Minimum Ignition Energy (MIE) ya mpweya wozungulira wophulika, kotero kuti palibe kuyatsa kapena kuphulika komwe kungachitike.
Chidziwitso Chofunika: Ndikofunikira kutsindika kuti chitetezo chamkati ndi chizindikiro cha dongosolo la kayendetsedwe ka zinthu, osati chizindikiro cha magetsiPalibe mphamvu imodzi yokha yamagetsi yomwe ingatanthauze dera lokha ngati lotetezeka mwachibadwa. Mphamvu yamagetsi ndi imodzi mwa magawo oletsa mphamvu, osati muyezo wokhawo woweruza.
2. Chigamulo Chofunika: Kodi Volti ya 24V Ndi Yotetezeka Mwachibadwa?
Pomaliza: 24V yokha siili yotetezeka mwachibadwaKungodalira mphamvu yamagetsi yotsika ya 24V sikungavomereze kuti circuit kapena chingwe chikhale chovomerezeka ndi IS.
Malinga ndi miyezo ya chitetezo ya IEC 60079-11 ndi GB 3836.4, malire a voltage wamba a ma IS circuits ndi ≤30V DC, zomwe zikutanthauza kuti 24V ndi mkati mwa mphamvu yovomerezeka yamagetsi pa ma circuit achitetezo amkati. Komabe, kutsatira ma voltage sikutanthauza kutsatira mphamvu zonse. Chitetezo chamkati cha circuit ya 24V chimadalira magawo atatu a mphamvu nthawi imodzi.
Gome 1 Malire Aakulu a Ma Circuits Otetezeka Mwamkati (IEC 60079-11)
| Chizindikiro | Malire Okhazikika a Ma Circuits a IS | Circuit Yachizolowezi ya 24V Yosakhala ya IS | Zotsatira Zotsatira |
|---|---|---|---|
| DC Yogwira Ntchito Voltage | ≤ 30V | 24 V | Kutsatira malamulo |
| Cholakwika Chambiri Chamakono | ≤ 300 mA | Kupitirira 300 mA | Zosatsatira malamulo |
| Mphamvu Yotulutsa Yokwanira | ≤ 1.3 W (Ex ia/ib) | Kupitirira 1.3 W | Zosatsatira malamulo |
Mphamvu yamagetsi ya 24V yachizolowezi yopanda chitetezo choletsa mphamvu imatha kutulutsa mphamvu zambiri komanso mphamvu zambiri pakagwa vuto la short-circuit. Ngakhale kuti voltage ndi 24V yokha, mphamvu ya spark yomwe imabwera chifukwa cha short-circuit discharge ndi yokwanira kuyatsa mpweya wambiri woyaka komanso wophulika, kotero imalephera kukwaniritsa zofunikira zachitetezo chamkati.
3. Zofunikira pa Ma Circuits Otetezeka a 24V
Seti ya 24V imatha kuzindikirika ngati yotetezeka mwachilengedwe pokhapokha ngati dongosolo lonse likukwaniritsa malire a mphamvu ndi kapangidwe kofananira. Zinthu zofunika kwambiri ndi izi:
3.1 Zipangizo Zovomerezeka Zochepetsa Mphamvu
Mphamvu yamagetsi ya 24V iyenera kukhala ndi chotchinga chachitetezo cha IS chovomerezeka kapena chotchinga chachitetezo chodzipatula. Chotchingacho chingathe kuletsa mphamvu yamagetsi, kuchepetsa mphamvu yamagetsi ndikuwononga mphamvu yochulukirapo pansi pa vuto, kuonetsetsa kuti mphamvu yamagetsi isapitirire malire oyatsira magetsi azinthu zoopsa. Mphamvu zamagetsi zosinthira zachizolowezi ndi mphamvu zamagetsi zolunjika zopanda chiphaso cha IS sizingagwiritsidwe ntchito pamabwalo achitetezo amkati a 24V.
3.2 Kufananiza Chingwe Chochepa ndi Kutsika kwa Inductance
Zingwe ndi zinthu zofunika kwambiri zomwe zimakhudza kusungidwa kwa mphamvu m'mabwalo a 24V IS. Zingwe zowongolera za 24V wamba zimakhala ndi mphamvu zambiri komanso mphamvu yogawa. Pakachitika vuto, mphamvu yosungidwa mu chingwecho imatulutsidwa kachiwiri, zomwe zimayambitsa zoopsa zoyatsira. Chifukwa chake, mabwalo a 24V IS ayenera kugwiritsa ntchito zingwe zapadera zotetezeka mwachilengedwe yokhala ndi capacitance yochepa komanso inductance yochepa, yomwe imalamulira mosamala kusungidwa kwa mphamvu ya mzere mkati mwa mulingo wovomerezeka.
3.3 Kupatula ndi Kukhazikitsa Kokhazikika
Zingwe za 24V IS ziyenera kuchotsedwa m'malo osakhala a IS amphamvu kwambiri, ndi mipata yokhazikika ya mawaya ndi njira zolekanitsira. Pakadali pano, zingwe za IS zimagwiritsa ntchito chizindikiritso cha buluu chogwirizana monga momwe zafotokozedwera mu miyezo, kuti zisalumikizane ndi mawaya wamba komanso kuwononga dongosolo lachitetezo lamkati.
Gome 2 Zofunikira ndi Zofunikira pa 24V IS System
| Gawo la Dongosolo | Zofunikira Zaukadaulo | Ndemanga |
|---|---|---|
| Chigawo cha Mphamvu cha 24V | Ndi satifiketi yovomerezeka ya Ex i, chitetezo chomangidwa mkati mwa mphamvu yamagetsi yochulukirapo komanso yowonjezereka | Magetsi wamba saloledwa |
| Chotchinga Chotetezera | Chitsimikizo cha IS, chogwirizana ndi mphamvu ya dera ndi magetsi | Gawo loletsa mphamvu |
| Chingwe cha M'munda | Capacitance yogawa yotsika & inductance, chidendene chakunja chabuluu | Chingwe chapadera cha IS |
| Chida Chakumunda | Ex ia / Ex ib yovomerezeka mwachinsinsi | Yogwirizana ndi mulingo wa mphamvu ya dongosolo |
| Kulumikiza ndi Kukonza Mawaya | Kulekanitsa mawaya a IS ndi mawaya osakhala a IS | Tsatirani IEC 60079-14 |
4. Malingaliro Olakwika Omwe Amafala M'makampani
4.1 Lingaliro Lolakwika 1: Ma circuits onse a 24V otsika mphamvu ndi otetezeka mwachibadwa
Mphamvu yamagetsi yochepa sikutanthauza chitetezo chamkati. Chitetezo chamkati chimayang'ana kwambiri mphamvu zochepa zowongolera pansi pa zochitika zonse zogwirira ntchito ndi zolakwikaMa circuit wamba a 24V alibe njira zochepetsera mphamvu, ndipo mphamvu yawo yolakwika ndi yopanda malire, yomwe ndi ya ma circuit otetezeka omwe si amkati.
4.2 Lingaliro Lolakwika 2: Zingwe zowongolera za 24V wamba zitha kulowa m'malo mwa zingwe za IS
Zingwe zowongolera wamba zimakhala ndi capacitance yayikulu komanso inductance yogawidwa. Ngakhale magetsi a 24V akutsogolo ali ndi chotchinga chachitetezo, mphamvu yochuluka yosungidwa ya chingwecho idzadutsa malire a mphamvu ya dongosolo la IS, zomwe zimapangitsa kuti ntchito yolimbana ndi kuphulika isagwire bwino ntchito.
4.3 Lingaliro Lolakwika 3: Ma circuits a 24V IS safuna chitetezo chokonza
Makina a 24V IS amakhala otetezeka pokhapokha ngati magetsi onse, zotchinga, zingwe ndi zida za m'munda zagwirizana ndipo zili bwino. Kuwonongeka kwa kutchinjiriza kwa zingwe, kusakaniza mizere, ndi kukalamba kwa zotchinga zachitetezo zonse zidzapangitsa kuti makina a 24V ataye makhalidwe achitetezo.
5. Mafotokozedwe a Kusankha Chingwe cha Machitidwe Otetezeka a 24V
Pa mabwalo a zida zachitetezo za 24V DC omwe amagwiritsidwa ntchito kwambiri m'malo opangira mafuta, mankhwala, migodi ndi malo ena oopsa, kusankha chingwe kuyenera kutsatira zomwe IEC 60079-14 ndi GB 3836.15 imanena. Gome 3 likuwonetsa zizindikiro zazikulu zaukadaulo za zingwe za IS ndi zingwe zowongolera wamba kuti zigwiritsidwe ntchito.
Gome 3 Kuyerekeza Magwiridwe Abwino Kwambiri: Chingwe cha IS vs Chingwe Cholamulira Chachizolowezi cha 24V
| Chinthu | Chingwe Chotetezeka Mwachilengedwe | Chingwe Chowongolera Chachizolowezi cha 24V |
|---|---|---|
| Mtundu wa Chigoba Chakunja | Buluu wofanana (chizindikiritso chokhazikika) | Zakuda, imvi kapena mitundu ina |
| Kugawa Mphamvu | Zochepa kwambiri (mtengo wotsika) | Pamwamba kwambiri |
| Kugawika kwa Inductance | Zochepa kwambiri (mtengo wotsika) | Pamwamba kwambiri |
| Woyendetsa | Mkuwa wothira m'chitini (IEC 60228 Gulu 5) | Mkuwa wolimba kapena wamba wokhazikika |
| Kugwiritsa Ntchito Kwambiri | Malo oopsa ophulika, ma IS circuits | Kulamulira mafakitale konse, madera omwe si oopsa |
| Chitsimikizo Chosaphulika | Ex i certified | Palibe satifiketi yachitetezo chamkati |
Mfundo zazikulu zosankhira:
- Magawo amagetsi: Kugawa mphamvu ndi inductance mochepa kwambiri kuti zitsimikizire kuti mphamvu yonse ya dongosolo ikukwaniritsa zofunikira za Ex ia/ib zomwe sizingaphulike.
- Kapangidwe ka kapangidwe ka nyumba: Zipangizo zapadera zotetezera kutentha zomwe sizimawononga mphamvu zambiri, mphamvu zamagetsi zokhazikika komanso mphamvu zabwino kwambiri zoletsa ukalamba.
- Kugwira ntchito koletsa kusokoneza: Kapangidwe kotetezedwa ndi kosankha kuti tipewe kusokonezeka kwa ma elekitiromagineti komwe kungayambitse kusinthasintha kwa magawo a circuit ndikukhudza chitetezo cha dongosolo.
6. Mapeto
24V ndi mkhalidwe wa magetsi oyenera kapangidwe ka chitetezo chamkati, koma osati mphamvu yamagetsi yotetezeka mwachibadwa. Kaya dera la 24V ndi zingwe zake zofanana zili ndi chitetezo chamkati zimatengera kapangidwe ka mphamvu yonse, kapangidwe kotsimikizika ka zotchinga zachitetezo, kugwiritsa ntchito chingwe chapadera cha IS komanso kukhazikitsa ndi kukonza kokhazikika.
Pakupanga mainjiniya a mawaya ndi kumanga pamalopo, ndikofunikira kusiya kwathunthu chidziwitso cholakwika cha "24V low voltage imafanana ndi chitetezo chamkati". Kusankha mosamala mawaya otetezeka mkati ndi zida zamagetsi zogwirizana mogwirizana ndi miyezo yapadziko lonse lapansi ndi dziko lonse ndiye chitsimikizo chachikulu cha magwiridwe antchito otetezeka komanso okhazikika amagetsi m'malo oopsa ophulika.
Chifukwa chiyani Chingwe cha Dingzun Pakukhazikitsa Malo Anu Oopsa:
Mukufuna chingwe chovomerezeka cha IS kuti mugwiritse ntchito zida zanu zowopsa?
[Lumikizanani ndi gulu lathu laukadaulo lero kuti mukambirane kapena kuti mupereke chitsanzo chanu].