Chii Chinorehwa neIntrinsically Safe Cable?
- Nhanganyaya: Nei "Kuchengetedzwa Kwemukati" Kuchikosha
Mumaindasitiri akadai senzvimbo dzinocheneswa mafuta, mafekitori emakemikari, nzvimbo dzinogadzira gasi, migodhi yemarasha yepasi pevhu, uye kugadzira mishonga, mhepo ine magasi anobvira moto, utsi, kana guruva rinobvira. Munzvimbo idzi dzine njodzi, chishamiso chemagetsi chinobva patambo yakakuvara kana kubatana kwakasununguka kunogona kukonzera kuputika kukuru.
(Dhayagiramu yehurongwa hweIntrinsically Safe (IS))
Apa ndipo panowanikwatambo dzakachengeteka (IS)kuva nechinangwa chakakosha pabasa.
Tambo yakachengeteka zvikuru yakagadzirwa kutikusagadzira kana kuchengetedza simba remagetsi rakakwanakukonzera kupisa—kunyangwe mumamiriro ezvinhu asina kunaka akadai sema "short circuits" kana "ground faults". Kusiyana nenzira dzinodzivirira kuputika (Ex-d) dzine kuputika mukati me "hombe" yakavharirwa, kuchengetedzeka kwemukati kunodzivirira kuputika kuti kusaitike pakutanga.
Gwaro iri rinotsanangura zvinorehwa netambo dzakachengeteka, mashandiro adzo, basa guru re capacitance uye inductance, uye nei kodhi yeruvara rwebhuruu ichidikanwa pasi rose pakuisa nzvimbo dzine njodzi.
- Tsanangudzo: Chii chinonzi Intrinsically Safe Cable?
Tsanangudzo Yepamutemo:Dunhu rakachengeteka mukati medu "iro risingakwanise kukonzera kupisa kana kupisa musanganiswa wezvinhu zvinobvira kana zvinobvira mumhepo pasi pemamiriro ekuyedzwa akatarwa" (IEC 60079-11).
Inoshandiswa patambo, Eland Cables inopa tsananguro inoshanda:
"Tambo dzemagetsi dzakavharirwa zvakanyanya saka dzinogona kuonekwa sedzakachengeteka mune mamwe mashandisirwo kana dzakadzivirirwa kubva mukukuvadzwa, kunze kwemagetsi kana magineti (EMI), uye dzakaparadzaniswa nematunhu asina kuchengetedzeka mukati."
Nemashoko akareruka:Waya yakachengeteka, kana ikashandiswa sechikamu chehurongwa hweIS hwakabvumidzwa hune zvipingamupinyi zvakakodzera zvemagetsi, haizombofi yakaburitsa spark inopisa zvakakwana kana kuti ine simba rekupisa mhepo ine njodzi yakapoteredza.
Musiyano Wakakosha:
| Nzira yekudzivirira | Mashandiro Azvo | Basa reCable |
| Kudzivirira Kuputika (Ex-d) | Ine kuputika mukati menzvimbo inorema, isingatsvi moto | Waya inopinda nepaburi rinodzivirira moto; nzvimbo yacho inoita basa rekudzivirira |
| Kuchengetedzwa Kwemukati (Ex-i / IS) | Inodzivirira kupisanekuderedza simba remagetsi pasi pemiganhu yekupisa | Maparamita emagetsi etambo (capacitance, inductance) anofanira kudzorwa; chivharo chinofanira kudzivirira EMI induction |
PaDingzun Cable,Tambo dzedu dzemidziyo dzakachengeteka dzakagadzirwa nemidziyo ine simba shoma, ine inductance shoma uye masheath ebhuruu anotevedzera IEC 60079-14—zvichivimbisa kuti michina yako yenzvimbo ine njodzi inoramba yakachengeteka uye ine chitupa.
- Mashandiro Azvo: Nheyo Yekuganhurira Simba
Sisitimu yakachengeteka zvikuru haivimbi nemakomba anorema. Asi, inovimbakuganhurirwa kwesimba.
3.1 Kugadzirwa kweSystem yeIS
Chimiro cheIS chinowanzo shandiswa chine zvikamu zvitatu zvinoshanda pamwe chete:
| Chikamu | Nzvimbo | Basa |
| Chipingamupinyi cheIS(Zener Diode kana Galvanic Isolator) | Nzvimbo Yakachengeteka (Imba Yekudzora) | Inoderedza voltage, current, uye simba rese kusvika padanho rakachengeteka (kazhinjipasi pe1.3 watts, kazhinji |
| Cable yeIS | Nzvimbo Ine Ngozi (Zone 0/1/2) | Inotumira simba shoma panguvakusachengeta simba rekuwedzeraizvo zvinogona kuburitswa sechishamiso |
| Chishandiso cheMunda cheIS | Nzvimbo Ine Ngozi (semuenzaniso, Zone 1) | Yakagadzirirwa kushanda zvakachengeteka mukati mesimba shoma |
3.2 Dambudziko reKuchengeta Simba: Nei Kugona uye Kupinda Kwesimba Zvichikosha
Kunyangwe paine chipingamupinyi chakakwana chinoganhurira simba kusvika tambo pachayoinogona kuchengetedza simba remagetsi mumhando mbiri:
Kukwanisa (C):Waya inoshanda se capacitor. Kondakita yega yega, nenzvimbo iri pakati pekondakita nechidzitiro, inochengetedza chaji yemagetsi. Kana waya ikabviswa kana kupfupika, chaji iyi yakachengetwa inobuda sespark.Kukwanisa kukuru = spark yakakura = njodzi yakakura yekubatidza.
Kupinza (L):Chinotenderera chetambo chinochengetedza simba remagineti. Kana dunhu racho ravhurwa, simba iri remagineti rinodonha, zvichiita kuti voltage iwedzere inogona kuburitsa spark.Kukwira kwemagetsi kwakakwira = kukwira kwemagetsi kwakawanda = njodzi huru yekubatidza.
Tafura 1: Nei Kukwanisa Kushoma uye Kuderera Kwemagetsi Zvichikosha paMatambo eIS
| Paramita | Chiratidzo | Zviyero | Njodzi | Chinodiwa cheIS |
| Kukwanisa (Core-Core) | Cc | nF/km kana pF/m | Cable inochengetedza chaji yemagetsi. Kana chaji ikapfupikiswa, inobuda sechaji. Cc yepamusoro = chaji yakakura | Inofanira kunge yakaderera( |
| Kukwanisa Kushanda (Core-Shield) | Cc | nF/km kana pF/m | Zvitoro zvinochaja pakati pekondakita nechidzitiro. Zvakakosha patambo dzakavharirwa | Zvinofanira kunyorwa pasi |
| Kufambiswa kwesimba | Lc | µH/m kana mH/km | Chinotenderera chetambo chinochengetedza simba remagineti. Kana chakavhurwa, simba rinodonha rinoita kuti voltage ikwire zvakanyanya | Inofanira kunge yakaderera uye ichidzorwa |
| Chiyero cheL/R | L/R | µH/Ω | Nguva isingachinji yedunhu; inoshandiswa pakupihwa chitupa chetambo yekuchera (BS 6704) | Inofanira kuenderana nezvinodiwa zvechidziviriro |
Zvinoreva Kushanda:Tambo yakajairika, ine simba rakawanda (semuenzaniso, waya yakachipa yePVC-insulated) inochengetedza simba rakawanda kupfuura tambo yeIS ine simba rakaderera (PE kana XLPE insulation). Kushandisa tambo isina certification ine IS barrier yakasimbiswa kunogona kukanganisa system yekuchengetedza zvachose—nekuti tambo pachayo inova sosi yekupisa.
PaDingzun Cable,tambo dzedu dzeIS dzinoshandisaPE (Polyethylene) kana kuti XLPE insulationine dielectric constant yakaderera (εᵣ=2.3), zvichipa simba remuchina kubva pakufambisa kuenda kumudziyo≤150 nF/km—kuona kuti simba rakachengetedzwa munzvimbo dzine njodzi.
- Kodhi yeRuvara rweBhuruu: Nei Matambo Ari Bhuruu
Pasi rose, tambo dzinoshandiswa pakuisa macircuit akachengeteka dzinozivikanwa nesheya rekunze rebhuruu(kazhinji kacho kakaita sebhuruu rakachenuruka, RAL 5015).
(tambo dzakachengeteka (IS) kuisirwa)
Tafura 2: Zvinodiwa paKodhi yeRuvara rweBhuruu (IEC 60079-14)
| Chinodiwa | Tsanangudzo | Nei Zvichikosha |
| Ruvara rwemuhara | Bhuruu Rakareruka (RAL 5015) | Kuonekwa nekukasika panguva yekuisa nekugadzirisa |
| Kumaka | Chiratidzo chinogara kwenguva refu: "Ex-ia" kana "Ex-ib" | Inosimbisa chiyero cheIntrinsic Safety chetambo |
| Zviteshi | Mateminari ebhuruu rakareruka kana maoko | Inodzivirira kubatanidzwa netsaona kune macircuit emagetsi asiri eIS |
| Masisitimu emugero | Kana ikashandiswa, mugero unofanirwa kunge wakanyorwa bhuruu kana kuti wakanyorwa kuti | Kupatsanurwa kubva kumatunhu asiri eIS |
Nei Kunyora Mavara Kwakakosha?
Vagadziri vemagetsi nevashandi vekugadzirisa vanoshanda munzvimbo dzine njodzi vanofanira kusiyanisa maseketi eIS (simba rakachengeteka) kubva kumaseketi emagetsi asiri eIS (simba rine njodzi). Kana nyanzvi ikabatanidza netsaona tambo yemagetsi isiri yeIS (semuenzaniso, 120V AC) kune IS terminal block, simba rinobuda rinogona kudarika chiyero chekuchengetedza chebhanhire—zvichishandura sisitimu "yakachengeteka" yakasimbiswa kuita njodzi inoputika.
Cherechedza Kutevedzera Mutemo:Kana sheya yetambo yako iri nhema, grey, kana chero ruvara rwusiri rwebhuruu rakachenuruka, inenge irikweteinoenderana nemaseketi eIS zvichienderana neIEC 60079-14—zvisinei nekushanda kwayo kwemagetsi.
PaDingzun Cable,Tambo dzedu dzakachengeteka dzinesheya rekunze rebhuruu rakareruka (RAL 5015)nechiratidzo cheEx-ia/Ex-ib chakasimba—kuva nechokwadi chekuti nzvimbo dzine njodzi dzinotevedzera zvinodiwa ipapo ipapo.
- Pfungwa yeChikamu: Nei MaParamita eCable Achifanira Kusimbiswa
Kuti sisitimu yeIS irambe yakanyoreswa,zvikamu zvitatu zvese—chidziviriro, tambo, uye mudziyo wekushandisa—zvinofanira kunge zvine maparamita emagetsi anoenderana. Izvi zvinonziPfungwa yeChinhu.
Tafura 3: MaParameter eEntity eIS System Verification
| Chikamu | MaParamita Akakosha | Tsananguro |
| Chipingamupinyi (Nzvimbo Yakachengeteka) | Izwi (V), Isc (A),Ca (Capacitance inobvumirwa zvakanyanya),La (Inductance inobvumirwa zvakanyanya) | Inotsanangura kuti tambo inogona kushivirira simba rakawanda sei rakachengeteka |
| Cable yeIS | Cc (Capacitance yetambo/km),Lc (Kubatidza kwetambo/km) | Inofanira kunyorwa padheti re data re cable |
| Chiridzwa Chemunda | Ci (Kukwanisa kwemukati), Li (Kupinda kwemukati) | Yakapihwa nemugadziri wezvishandiso |
Mafomuro Ekusimbisa:
- Kuongorora Kugona Kwemagetsi:(Cc × Kureba kweCable) + Ci ≤ Ca
- Kuongorora Kufambiswa Kwemuchina:(Lc × Kureba kweCable) + Li ≤ La
Zvinoreva Zvakakosha:Kana mugadziri wetambo asingapeCc(capacitance) uyeLc(inductance), tambo haigone kushandiswa musystem yeIS ine certification. Ndosaka kushandisa "chero tambo yakadzivirirwa" munzvimbo ine njodzi kune njodzi uye kusingatevedzere mitemo—haugone kusimbisa maparamita echinhu pasina data.
PaDingzun Cable,tinopamaparamita eLc (µH/m) uye Cc (nF/km) akasimbiswanekutumira kwese kwe IS cable—zvichikubatsira kuti uite kuverenga kwakarurama kwechinhu uye kuchengetedza kutevedzera mitemo yenzvimbo dzine njodzi.
- Ex-ia vs. Ex-ib: Mazinga eKuchengetedzwa Kwemukati
Maseketi eIS anoiswa muzvikamu zvakasiyana zvichienderana nekusagona kwawo kukanganiswa uye nzvimbo ine njodzi inobvumirwa.
Tafura 4: Kuyera Matambo eEx-ia vs. Ex-ib
| Chiyero | Kushivirira Mhosva | Nzvimbo Inoshanda | Zvinodiwa neCable |
| Kubva zvino zvichienda mberi | Zvikanganiso zviviri zvakazvimiririra | Nzvimbo 0(Njodzi inoputika inogara iripo) | ZvinodiwazvakamanikanaMiganhu yeL/C; kuchengetedzeka kwakanyanya |
| Aimbova mumwe chete | Chikanganiso chimwe chete | Nzvimbo 1(Njodzi inogona kuputika) | Zvinodiwapakati nepakatiMiganhu yeL/C; tambo yeIS yakajairwa yakakwana |
| Ex-ic | Hapana chikanganiso (kushanda kwakajairika chete) | Nzvimbo yechipiri(Hazvigoneki, kwenguva pfupi) | Hapana miganhu yakakosha yeL/C; tambo yakajairwa inogona kugamuchirwa |
Mhedzisiro Pakusarudza Cable:Maseketi eEx-ia anoda miganho yakaderera ye capacitance uye inductance kupfuura Ex-ib kuti ive nechokwadi chekuti yakachengeteka kana paine zvikanganiso zviviri. Gara uchitarisa IS level inodiwa usati wasarudza waya.
- Zvinodiwa zvekudzivirira maCable eIS
Sekureva kweNFPA 70 Chikamu 504.30,kudzivirira kunodiwakuti pave nemasekete akachengeteka ekudzivirira kubatana kweEMI.
Nei Kudzivirira Kuchikosha:Madhiraivha eVariable Frequency (VFDs), maradio transmitters, uye michina yekuwedera zvinogadzira electromagnetic interference (EMI). Iyi EMI inogonakukonzera voltage uye ikozvinopatambo refu yemudziyo—kunyangwe chipingamupinyi chikaganhurira simba kusvika ku1.2W, sosi yekunze yeEMI inogona kukonzera simba rakakwana kugadzira spark inokwanisa kubatidza.
(kukuruka waya yemhangura yakavharirwa nefoil yealuminium uye yakarukwa nesimbi)
Tafura 5: Sarudzo dzekudzivirira dze IS Cables
| Rudzi rweNhoo | Kufukidza | Kushandiswa Kwakanakisisa | Kukodzera kweIS |
| Nhoo yeFoil | 100% | Kuiswa kwakasimba, high-frequency EMI | Zvinogamuchirwa kumhanya kwenguva pfupi, kusingachinji |
| Nhoo Yekurukwa | 70-95% | Mashandisirwo anochinja-chinja/anochinjika, EMI yakaderera | Zvinokurudzirwa zvekuchera migodhi, marobhoti |
| Yakasanganiswa (Foil + Ruoko) | 100% + kurukwa | Maindasitiri akaomarara, EMI yakakwira | Yakanakira nzvimbo dzekuchenesa, zvirimwa zvemakemikari |
Mutemo weKudzika:Nhoo inofanira kugadzikwa pasipoindi imwe chete(kazhinji munzvimbo yakachengeteka pamucheto) kudzivirira zvitenderedzo zvepasi zvinogona kuunza simba rine njodzi.
PaDingzun Cable,Tambo dzedu dzeIS dzinoshandachifukidziro chesimbi chemhangura chakarukwa mugaba (≥85% kufukidza)sechinowanzoitwa—kudzivisa EMI induction uku uchiramba uchitevedzera IS.
- Magadzirirwo Akakosha Ehunyanzvi eIS Cables
Paunenge uchitsanangura tambo dzakachengeteka munzvimbo dzine njodzi, simbisa izvi zvakakosha:
Tafura 6: Rondedzero yekutarisa Specification ye IS Cable
| Paramita | Chinodiwa cheIS | Nei Zvichikosha |
| Kukwanisa (Core-Core) | ≤150 nF/km(PE/XLPE insulation) | Inoganhurira muripo wekuchengetedza; inoita kuti chinhu chienderane nemutengo weCa |
| Kukwanisa Kushanda (Core-Shield) | ≤250 nF/km | Zvakakosha patambo dzakavharirwa; zvinokanganisa simba rakachengetwa |
| Kufambiswa kwesimba | ≤0.8 mH/km | Inoderedza kukwira kwemagetsi kana maseketi akavhurika |
| Ruvara rwemuhara | Bhuruu Rakareruka (RAL 5015) | Kuzivikanwa kwekuona zvichienderana neIEC 60079-14 |
| Kudzivirira | Kurukwa kwese kwese (≥85% kufukidza) | Inovhara kupinda kweEMI munzvimbo ine njodzi |
| Waya yeDrein | Zvinosanganisirwa (mhangura yakakangwa) | Zvinorerutsa kudzika kwenzvimbo imwe chete |
| Kudzivirira kupisa | PE kana XLPE (yakaderera εᵣ) | Kugara kwenguva refu kwe dielectric = kugona kwakaderera |
| Mutyairi | Mhangura yakakangwa mugaba | Kuchinjika + kuramba ngura |
| Kuyera Tembiricha | -40°C kusvika +90°C (zvishoma) | Inopona munzvimbo dzemaindasitiri |
| Chiyero cheMurazvo | IEC 60332-1-2 kana kupfuura | Kuchengetedzwa kwemoto |
- Ngano Dzakajairika Nezve Cables Dzakachengeteka Mukati
| Ngano | Chokwadi |
| "Chero waya yakavharirwa ine IS-rated." | Nhema. Tambo dzeIS dzinoda maparamita eCc/Lc akadzorwa uye sheathing yebhuruu. Tambo dzakajairwa dzakadzivirirwa hadzina maparamita akabvumidzwa. |
| "Chidziviriro ichi chinoita basa rese rekuchengetedza—waya haina basa." | Nhema. Waya iyi inochengetedza simba (capacitance/inductance). Waya ine capacitance yakawanda inogona kukunda kuchengetedzeka kwechinhu chinovhara. |
| "Waya yebhuruu ingori ruvara rwekushambadzira." | Nhema. Bhuruu inorayirwa neIEC 60079-14 kuti ionekwe sekiteshi yeIS. Waya isina bhuruu haiteereri mitemo. |
| "Is tambo yakawandisa pakushandisa kwangu." | Zvinoenderana. Kana uine gasi/utsi/guruva rinobvira riri kushanda zvakajairika, IS (kana Ex-d) inosungirwa nekodhi yemagetsi. |
| "Ndinogona kubatanidza tambo yeIS nezvinobatanidza zvakajairwa." | Nhema. Ma splices anogadzira ma parameter emagetsi asingazivikanwe (Ci, Li) ayo anoita kuti kuverenga kwezvinhu kusashande. |
Nezve Dingzun Cable: Mubatsiri Wako weUinjiniya weCable Yakachengeteka Mukati
NaMakore makumi maviri+ eruzivo rwekugadzira zvinhu,Cable yeDingzunishamwari inovimbwa nayo yemapurojekiti epasi rose esimba, makemikari, migodhi, uye mishonga inoda zvitupaTambo dzemidziyo dzakachengeteka mukatiTinosanganisa ruzivo rwakadzama rwenzvimbo dzine njodzi nekugadzirisa zvakanyanyakuna d tambo dze eliver dzinoenderana nezvinodiwa zvako chaizvo zveIS uye maparamita enhengo.
Kugona Kwedu Kwetambo yeIS:
| Kugona | Tsanangudzo yeDingzun |
| Kutevedzera mitemo | IEC 60079-11, IEC 60079-14, NFPA 70, IEEE 1580 |
| Kuongororwa kweIS | Kubva zvino zvichienda mberi(Nzvimbo 0),Aimbova mumwe chete(Nzvimbo 1),Ex-ic(Nzvimbo 2) |
| Ruvara rwemuhara | Bhuruu Rakareruka (RAL 5015)— zvinosungirwa maererano neIEC 60079-14 |
| Zvinhu zvemumuhara | LSZH (kuchengetedza moto), PUR (mafuta / abrasion), PVC (general) |
| Kudzivirira kupisa | PE kana XLPE— capacitance yakaderera (≤150 nF/km) |
| Kudzivirira | Rukwa rwemhangura rwakarukwa mugaba(≥85% kufukidza) + waya yekudhonza mvura |
| Mutyairi | Mhangura yakakangwa mugaba (Kirasi 5/6, 18-24 AWG) |
| Magadzirirwo emagetsi | Chitupa cheLc (µH/m) neCc (nF/km)zvakapihwa pakuverenga kwemasangano |
| Nzvimbo yekupisa | -40°C kusvika +90°C (yakajairwa); -65°C kusvika +200°C (premium FEP) |
| Chiyero cheMurazvo | IEC 60332-1, IEC 60332-3 (sarudzo dzeLSZH) |
| Kuedzwa | Kuedzwa kwemagetsi kwe100%pa reel yega yega |
Sei Cable yeDingzun yekuisa Nzvimbo Yako Ine Ngozi:
- Kugadziriswa kwakanyanya— Kuwanda kwevaviri (1 kusvika 100+), conductor gauge, shielding density, sheath material—zvese zvakagadzirirwa IS application yako
- Chikwata chenyanzvi dzeinjiniya— Rutsigiro rwekuverenga maparamita echinhu (Ca/La matching) kuti ive nechokwadi chekuti chipingamupinyi chinoenderana
- Kutaurirana kwehunyanzvi zvakananga— Mashoko ekukurumidza, mapepa eruzivo rwehunyanzvi akazara ane kukosha kweLc/Cc, uye kutumira kwepasi rose
- Magwaro akazara— Mishumo yebvunzo, zvitupa zvekutevedzera mitemo, uye kurongeka kwekutumira kwega kwega
Unoda tambo yeIS ine chitupa chekushandisa pakushandisa zvinhu zvine njodzi munzvimbo yako here?