Chii chinonzi Intrinsically Safe Instrument Cable?
Chii chinonzi Intrinsically Safe Instrument Cable?
Mumaindasitiri akadai sekuchenesa mafuta, kugadzira makemikari, uye kugadzira migodhi, mhepo ine magasi anobvira, utsi, kana guruva. Munzvimbo idzi dzine njodzi, chishamiso chemagetsi chinobva patambo yemidziyo yakakuvara chinogona kukonzera kuputika kukuru.
AnTambo yemidziyo yakachengeteka mukati (IS)ndiyo mhinduro. Kusiyana netambo dzechinyakare dzinodzivirira kuputika (Ex-d) kana maconduit anoedza kudzivirira kuputika mukati menzvimbo yakavharwa, tambo yeIS inodzivirira kuputika zvachose nekuona kuti simba remagetsi rinofamba nepawaya riri pasi.hazvimbofi zvakakwira zvakakwana kuti zvigadzire sparkizvo zvinogona kuunza mhepo.
Gwaro iri rinotsanangura mashandiro anoita tambo dzezvishandiso dzeIS, zvinodiwa pakuvaka kwadzo, maparamita emagetsi akakosha, uye maitiro ekuatsanangura nemazvo pakuisa kwako nzvimbo dzine njodzi.
- Tsanangudzo & Nheyo Yekushanda
Mutemo wepasi roseIEC 60079-11inotsanangura kuchengetedzeka kwemukati senzira yekudzivirira yakavakirwa pamusimboti wekuganhurira simba.
Tsanangudzo Yepamutemo:Dunhu rakachengeteka mukati memunhu ndiro rimwe"umo chero pfari kana kupisa kusingakwanise kukonzera kupisa kwemusanganiswa wezvinhu zvinobvira kana zvinobvira mumhepo pasi pemamiriro ekuyedzwa akatarwa."
(Yakachengeteka mukati memuviri vs. Inodzivirira Kuputika: IS inodzivirira kupiswa nekudzora simba (IEC 60079-11) nepo Ex-d iine kuputika mukati menzvimbo dzakavharwa)
Mashandiro Azvo:
- Kudzivirira (Ex-d):Vaka bhokisi resimbi rinorema rakasimba zvakakwana kuti ridzivirire kuputika mukati.
- Kudzivirira (Ex-i / IS):Deredza voltage, current, uye simba rinopinda munzvimbo ine njodzi zvishoma zvekuti kunyange short circuit inoita kutihapana chishamisouyehapana mhedzisiro yekupisainokwanisa kupisa.
PaDingzun Cable,Tinogadzira tambo dzezvishandiso zveIS dzakagadzirwa kuti dzichengetedze simba iri kunyangwe painenge paine dambudziko, tichiona kuti zvishandiso zvako zvine njodzi zvinoramba zvakachengeteka.
- Zvinodiwa Zvikuru zveIS Instrument Cables (Zvinoenderana neIEC 60079-14)
Haasi mawaya ese anogona kushandiswa musystem yakachengeteka. Mawaya eIS ane zvinodiwa zvekuvaka uye kuzivikanwa kuti ave nechokwadi chekuti system yacho yakasimba.
Tafura 1: Zvinodiwa zveIs Instrument Cable
| Chinodiwa | Tsanangudzo | Chimiro Chekutanga | Nei Zvichikosha |
| Kuganhurirwa Kwesimba | Inofanira kunge yakaparadzaniswa nematunhu asiri eIS | IEC 60079-14 | Inodzivirira kufamba kwesimba rine njodzi munzvimbo ine njodzi |
| Kudzivirira | Zvinodiwa (foil kana kurukwa) kudzivirira EMI coupling | Chikamu 504.30 cheNFPA 70 | Inovhara kukanganiswa kwemafrequency eredhiyo kunogona kukonzera magetsi |
| Kudzora Kudzora (Lc) | Inofanira kunyorwa (µH/m) | IEC 60079-14 | Inodzivirira kukwira kwemagetsi kana maseketi akavhurika |
| Kudzora Kugona Kwemagetsi (Cc) | Inofanira kunge yakanyorwa (nF/km) | IEC 60079-14 | Inoganhurira muripo wakachengetwa unogona kuburitsa sechipfungaidzo |
| Kudzivirirwa kweMichina | Chidimbu chakasimba (PUR kana LSZH) | IEC 60092-502 | Inopona munzvimbo dzakaoma dzemaindasitiri |
| Kuzivikanwa | Chidimbu chekunze chebhuruu rakareruka (RAL 5015) | Mwero wepasi rose (IEC 60079-14) | Kuzivikanwa kwemaziso nekukasika kunodzivirira kubatana netsaona nemagetsi asiri eIS |
| Mutyairi | Mhangura yakasungwa(Kirasi 5 kana 6) | IEEE 1580 | Kuchinjika kwekugadzwa uye kuramba kudedera |
Chinyorwa Chinokosha Pakuziva:IEC 60079-14 inoda kuti macircuit akachengeteka aonekwe neruvara rwebhuruu rakareruka(RAL 5015). Kana sheath yetambo iri nhema, inengekwetezvinotevedzera zvinodiwa zveIS applications.
- Kunyura Zvakadzika: Zvinodiwa zvekudzivirira maCable eIS
Kudzivirira hakudiwi kana paine waya dzemidziyo yeIS—zvinosungirwa kutevedzera NFPA 70 Chikamu 504.30. Asi nei?
Dambudziko:Mumafekitori emaindasitiri, maVariable Frequency Drives (VFDs), maradio transmitters, uye michina yekuwedera zvinogadzira electromagnetic interference (EMI). Iyi EMI inogonakukonzera voltage uye ikozvinopatambo refu yemudziyo. Kunyangwe kana chipingamupinyi chikaganhurira simba kusvika ku1.2W, redhiyo iri pedyo inogona kuunza simba rakakwana patambo isina kudzivirirwa kuti igadzire spark inokwanisa kubatidza.
Mhinduro:Anhoo (yakarukwa kana kuti foil)Inofukidza mapeya anotakura masaini. Inoshanda sekeji yeFaraday, ichiburitsa ruzha rwunokonzerwa zvakachengeteka pasi (panzvimbo imwe chete) isati yasvika kune sensor yenzvimbo ine njodzi.
(Chikamu chetambo yeIntrinsically Safe instrument ine maconductor emhangura akasungirirwa, PE/XLPE low-capacitance insulation, overall copper braid screen, uye light-blue sheath inodiwa sekureva kweIEC 60079-14)
Tafura 2: Mhando dzekudzivirira dze IS Instrument 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, midziyo yekufambisa |
| Yakasanganiswa (Foil + Ruoko) | 100% + kurukwa | Maindasitiri akaomarara, EMI yakakwira | Yakanakira nzvimbo dzekuchenesa, nzvimbo dzemakemikari, nzvimbo dzemagetsi |
Mutemo wekusimbisa IS Shields: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)sezvinodiwa, nesarudzo dzakasanganiswa dzenzvimbo dzakanyanya EMI—uchiva nechokwadi chekuti maseketi ako enzvimbo dzine njodzi anoramba akachengeteka.
- Magadzirirwo Emagetsi: Kugona & Kupinza
Waya iyi haisi kungobatanidza magetsi chete. Inochengeta simba remagetsi mumhando mbiri dzinogona kuva manyuko emoto kana paine dambudziko.
Tafura 3: Maparamita Emagetsi eCritical IS Cable
| Paramita | Chiratidzo | Zviyero | Nei Zvichikosha Pakuchengetedzwa Kwemukati |
| Kukwanisa (Core-Core) | Cc | nF/km | Mawaya anochengeterwa tambo anochaja sebhatiri. Kana akadzima, chaja iyi inobuda semoto. Cc yepamusoro = daro pfupi rakachengeteka |
| Kukwanisa Kugona (Core-Screen) | Cc | nF/km | Zvitoro zvinochaja pakati pekondakita nechidzitiro. Zvakakosha patambo dzakavharirwa |
| Kufambiswa kwesimba | Lc | µH/m kana mH/km | Maseketi eInductive anogadzira ma voltage spikes kana akavhurwa. Higher Lc = simba guru re spark |
| Chiyero cheL/R | L/R | µH/Ω | Inotsanangura nguva isingachinji yedunhu. Inoshandiswa neBS 6704 pakugadzira tambo dzekuchera |
Mhedzisiro Inoshanda:Kana ukashandisa tambo yakajairika, ine simba rakawanda (waya yakachipa yePVC-insulated) pachinzvimbo chetambo yeIS yakasimbiswa (insulation yePE/XLPE ine simba rakaderera), simba rakachengetwa mutambo rinogona kupfuura chitupa chekuchengetedza chechidzitiro—zvichishandura sisitimu "yakachengeteka" kuita inogona kuputika, kunyangwe paine chinodzivirira chakakodzera.
- Pfungwa yeChinhu: Kufananidza Cable, Chipingamupinyi, uye Chishandiso
Kuti sisitimu isimbiswe seIntrinsically Safe,zvikamu zvitatu zvese—chidziviriro, tambo, uye mudziyo wekushandisa—zvinofanira kunge zvine maparamita emagetsi anoenderana. Izvi zvinonziPfungwa yeChinhu.
Tafura 4: MaParameter eEntity eIS System Verification
| Chikamu | MaParamita Akakosha | Tsananguro |
| Chipingamupinyi (Nzvimbo Yakachengeteka) | Izwi(Vhura voltage yedunhu),Isc(Nguva pfupi yedunhu),Izvozvo(Capacitance inobvumidzwa zvakanyanya),Iyo(Inductance inobvumidzwa zvakanyanya) | Inotsanangura kuti chipingamupinyi chinogona kuganhurira simba rakawanda sei |
| Cable yeIS | Cc(Capacitance yetambo/km),Lc(Kupinza kwetambo/km) | Inofanira kunyorwa padheti re data re cable |
| Chiridzwa Chemunda | Ikoko(Kukwanisa kwemukati),Izvozvo(Kupinda kwemukati) | Yakapihwa nemugadziri wezvishandiso |
Mafomuro Ekusimbisa:
- Kuongorora Kugona Kwemagetsi:(Kugona Kwetambo × Kureba) + Kugona Kwechishandiso ≤ Kugona Kwechivhariso ((Cc × L) + Ci ≤ Ca)
- Kuongorora Kufambiswa Kwemuchina:(Kupinza Kwetambo × Kureba) + Kupinza Kwezviridzwa ≤ Kupinda Kwechipingamupinyi ((Lc × L) + Li ≤ La)
Zvinoreva Zvakakosha:Kana mugadziri wetambo asingapeCcuyeLckukosha kwayo, tambo haigone kushandiswa muhurongwa hweIS hwakabvumidzwa. Ndosaka kushandisa "chero tambo yakadzivirirwa" kune njodzi uye kusingatevedzere mitemo.
PaDingzun Cable,tinopamaparamita eLc neCc akasimbiswanekutumira kwese kwe IS cable, zvichikugonesa kuita maverengero chaiwo echinhu uye kuchengetedza kutevedzera mitemo yenzvimbo dzine njodzi.
- Ex-ia vs. Ex-ib: Mazinga eKuchengetedzwa Kwemukati
Maseketi eIS anoiswa muzvikamu zvakasiyana zvichienderana nekukwanisa kwawo kukanganiswa uye nzvimbo inobvumirwa kuiswa.
Tafura 5: Kuyera kweEx-ia vs. Ex-ib kweMatambo eZvishandiso
| Chiyero | Kushivirira Mhosva | Nzvimbo Inoshanda | Kushandiswa Kwakajairika Kwezviridzwa |
| Kubva zvino zvichienda mberi | Zvikanganiso zviviri zvakazvimiririra | Nzvimbo 0(Njodzi inoputika inogara iripo) | Zvishandiso zvekuongorora gasi reMethane, vaongorori veokisijeni |
| Aimbova mumwe chete | Chikanganiso chimwe chete | Nzvimbo 1(Njodzi inogona kuputika) | Zvinotumira kumanikidzwa, masensa ekupisa, mita yekuyerera |
Mhedzisiro Pakusarudza Cable:Maseketi eEx-ia anoda miganho yakamanikana pamatanho eL/C etambo kupfuura Ex-ib kuti ive nechokwadi chekuti yakachengeteka kana paine zvikanganiso zviviri. Gara uchiongorora IS level inodiwa usati wataura tambo.
- Zvinodiwa pakuvaka ma IS Instrument Cables
Tafura 6: Magadzirirwo ekuvaka tambo yezviridzwa zve IS
| Chikamu | Chinodiwa cheIS | Sei |
| Mutyairi | Mhangura yakasungwa(Kirasi 5 kana 6, 7 kusvika 19 tambo) | Kuchinjika kwekugadzwa uye kuramba kudedera |
| Zvinhu zveMutyairi | Mhangura yakachekwa mugaba(inokurudzirwa kumaindasitiri) | Kuramba ngura mumhepo ine hasha |
| Kudzivirira kupisa | PE (Polyethylene)kanaXLPE | Chinogara chichishandiswa nemagetsi chakaderera (ε)ᵣ=2.3) = kugona kwakaderera = kureba kwakachengeteka kwenguva refu |
| Kuzivikanwa kweVaviri | Bhuruu/Dema (rakajairika) kana kuti rine nhamba | Inodzivirira zvikanganiso zvemagetsi |
| Kudzivirira | Rukwa rwemhangura rwakarukwa mugaba(≥85% yehuwandu hwezvinhu) | Inovhara EMI inogona kukonzera simba rinokwanisa kupisa |
| Waya yeDrein | Zvakabatanidzwa(mhangura yakakangwa) | Zvinorerutsa kugumisa nhoo |
| Jekete remukati | LSZH kana PVC | Inowedzera dziviriro yemakanika |
| Muhara weKunze | Bhuruu Rakareruka (RAL 5015), LSZH kana PUR | Chiratidzo chinoratidza IS circuit; LSZH yekuchengetedza moto, PUR yekudzivirira mafuta/abrasion |
| Nzvimbo yekupisa | -40°C kusvika +90°C (yakajairwa); -65°C kusvika +200°C (premium FEP) | Inorarama mumamiriro ezvinhu akaoma emiti |
- Mitemo Yekuisa Matambo eIS Instrument
Kunyangwe tambo yeIS yakanakisisa ichakundikana kana ikaiswa zvisiri izvo.
Tafura 7: Zvinodiwa pakuisa tambo yeIS (IEC 60079-14)
| Mutemo | Chinodiwa | Sei |
| Kuparadzana | Maseketi eIS anofanirwa kunge arikuparadzaniswa panyamakubva kumasekete asiri eIS | Inodzivirira njodzi yesimba |
| Kureba kweKuparadzaniswa | ≥50mm (2 inches) kubva patambo dzisiri dzeIS (kana kuburikidza nekuparadzanisa simbi yakadzika) | Inodzivirira kubatana kwe inductive/capacitive |
| Kuzivikanwa kweChiteshi | Shandisamaterminal ebhuruu rakarerukakana maoko akarembera | Kuongororwa kwekuchengetedzwa kwemaziso kwevashandi vekugadzirisa |
| Masisitimu emugero | Kana mugero uchigovana nevasiri veIS, mugero unofanirwa kunge uripobhuruu rakarerukakana kuti yakanyorwa | Inodzivirira kusanganisa netsaona panguva yekudhonza |
| Hapana Zvidimbu | Dzivisa kubatanidza zvinhu; shandisa waya inoenderera mberi | Zvidimbu zvinogadzira maparamita emagetsi asingazivikanwe |
| Kudzika pasi | Nhoo yakamira pasi papoindi imwe chete(nzvimbo yakachengeteka) | Inodzivirira zvitenderedzo zvepasi zvinogona kuunza simba rine njodzi |
- Mashandisirwo Anoda Matambo eIs Instrument
Tambo dzezvishandiso zveIS dzinosungirwa kushandiswa kune ese maseketi ane simba shoma anopinda munzvimbo dzine njodzi.
(Kuisa tambo yemidziyo yakachengeteka (IS))
Tafura 8: Mashandisirwo e IS Instrument Cable neIndasitiri
| Maindasitiri | Nzvimbo Ine Ngozi | Maitiro Akajairika eIS |
| Oiri neGasi | Nzvimbo 1/2 (matsime emvura, mapuratifomu) | Zvinotumira mweya, mita yekuyerera, zvinoona gasi, maRTD |
| Kugadziriswa kweMakemikoro | Nzvimbo 1 (ma "reactors", matangi ekuchengetera zvinhu) | masensa epH, maprobes ekupisa, maswichi emazinga |
| Mishonga | Nzvimbo 1 (kubata zvinonyungudutsa) | Zvishandiso zvekudzora mabheti, masensa ekuchenesa imba |
| Kuchera (Marasha) | Nzvimbo 0/1 (pasi pevhu) | Zviyereso zveMethane, marambi evhavha, masensa ekuswedera pedyo |
| Mvura Yakasviba | Nzvimbo 1 (zvivakwa zvechigayo) | Methane monitors, okisijeni analyzers |
| Matende ekupenda/kupfapfaidza | Nzvimbo 1 | Masensa emhando yemhepo, mamonita ekupisa |
Nezve Dingzun Cable: Mubatsiri Wako weIs Instrument Cable Engineering
NaMakore makumi maviri+ eruzivo rwekugadzira zvinhu,Cable yeDingzunishamwari inovimbwa nayo yemapurojekiti epasi rose esimba, makemikari, uye migodhi inoda zvitupaTambo dzemidziyo dzakachengeteka mukatiTinosanganisa ruzivo rwakadzama rwenzvimbo dzine njodzi nekugadzirisa zvakanyanyakuti utumire tambo dzinoenderana nezvinodiwa zvako zveIS uye maparamita enhengo.
(Dingzun Cable Intrinsically Safe instrument cable — yakasimbiswa neIEC 60079-11 yekushandiswa kwezvishandiso zvine njodzi munzvimbo)
Kugona Kwedu kwe IS Instrument Cable:
| Kugona | Tsanangudzo yeDingzun |
| Kutevedzera mitemo | IEC 60079-11, IEC 60079-14, NFPA 70, IEEE 1580 |
| Kuongororwa kweIS | Kubva zvino zvichienda mberi(Zone 0) uyeAimbova mumwe chete(Nzvimbo 1) |
| Mutyairi | Mhangura yakakangwa mugaba (Kirasi 5/6, 18-24 AWG) |
| Kudzivirira kupisa | PE kana XLPE(Kukwanisa kushanda kwakaderera ≤150 nF/km) |
| Kudzivirira | Rukwa rwemhangura rwakarukwa mugaba(≥85% yehuwandu hwezvirwere, hwakaongororwa) |
| Waya yeDrein | Yakabatanidzwa kuti ive nyore kugadzika pasi |
| Ruvara rwemuhara | Bhuruu Rakareruka (RAL 5015)—zvinosungirwa maererano neIEC 60079-14 |
| Zvinhu zvemumuhara | LSZH (kuchengetedza moto), PUR (mafuta / abrasion), PVC (general) |
| 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) |
| Kuedzwa | Kuedzwa kwemagetsi kwe100%pa reel yega yega |
Nei Dingzun Cable Inoshandiswa Pakushandisa Zvishandiso Zvako Zvine 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 instrument ine chitupa chekuisa panzvimbo yako ine njodzi here?[Bata timu yedu yehunyanzvi nhasi kuti uwane mazano kana kuti uwane muenzaniso wakagadzirwa nevatengi].