Cov Cheebtsam tseem ceeb ntawm Cable

Ib lub cable yog ib qho khoom siv hluav taws xob sib kis tau yooj yim los ntawm ntau yam khoom. Nws cov khoom tseem ceeb tuaj yeem muab faib ua plaub qhov tseem ceeb: tus neeg xyuas pib, txheej txheej rwb thaiv tsev, txheej thaiv, thiab txheej txheej sheath. Qee cov cables tshwj xeeb kuj tseem muaj cov txheej txheem muab tub lim lossis cov qauv siv zog. Cov hauv qab no muab cov ncauj lus kom ntxaws tsom xam ntawm txhua feem los ntawm kev ua haujlwm thiab kev pom zoo:

Tus neeg xyuas pib txheej: Lub hauv paus ntawm kev sib kis tam sim no
Tus neeg xyuas pib yog "cov hlab ntsha" ntawm lub cable, lub luag haujlwm rau kev xa hluav taws xob hluav taws xob lossis cov teeb liab. Cov khoom siv feem ntau suav nrog tooj liab, aluminium, thiab alloys. Copper conductors, vim lawv cov conductivity siab (kwv yees li 58 MS / m) thiab muaj zog oxidation tsis kam, account rau ntau tshaj 80% ntawm cov lag luam sib koom, tshwj xeeb tshaj yog haum rau high -voltage thiab high- zaus daim ntawv thov; aluminium conductors, vim lawv cov nqi qis (kwv yees li 1/3 ntawm tooj liab) thiab lub teeb yuag (qhov ntom yog 30% ntawm tooj liab), feem ntau yog siv rau hauv cov nyiaj siv ua haujlwm lossis nruab nrab thiab qis -voltage fais fab faib. Tus neeg xyuas pib cov qauv tau muab faib ua cov khoom thiab cov khoom sib khi. Stranded conductors, los ntawm cov kauv winding ntawm ntau cov xov hlau nyias, tuaj yeem txhim kho kev yooj yim (khoov vojvoog tuaj yeem txo mus rau 6 npaug ntawm txoj kab uas hla) thiab txo cov nyhuv ntawm daim tawv nqaij (tam sim no concentration ntawm qhov chaw thaum lub sij hawm siab - zaus kis tau tus mob).

Rwb thaiv tsev txheej: Lub Barrier rau hluav taws xob kev nyab xeeb
Cov txheej txheej rwb thaiv tsev yuav tsum ua kom tau raws li cov yam ntxwv ntawm kev ua haujlwm siab (feem ntau ntau dua lossis sib npaug li 3 npaug ntawm qhov ntsuas hluav taws xob), tsis tshua muaj hluav taws xob poob (tanδ Tsawg dua lossis sib npaug rau 0.01%), thiab kev laus tsis kam (tsis tawg tom qab 720 teev ntawm 158 degree). Cov ntaub ntawv uas muaj xws li:

• Polyvinyl chloride (PVC): Tus nqi qis (kwv yees li 2 yuan / meter), qhov kub thiab txias -15℃~ 70 degree, feem ntau yog siv rau hauv tsev hluav taws xob qis hluav taws xob;
• Hla-txuas polyethylene (XLPE): Kub tiv taus mus txog 90℃~ 125 degree, dielectric zog nce 30%, thiab yog lub ntsiab kev xaiv rau siab -voltage cables (siab tshaj 110kV);
• Silicone roj hmab: Kub tsis kam -60℃~ 200 degree, yooj yooj yim, feem ntau siv hauv cov khoom siv txawb xws li aviation thiab kho mob.

Kev Tiv Thaiv Txheej Txheem: Tus Saib Xyuas ntawm Lub Teeb Pom Kev purity
Cov txheej thaiv tiv thaiv txo kev cuam tshuam los ntawm kev sib cais ntawm electromagnetic, thiab muab faib ua cov ntawv ci hlau thaiv (txhuas ntawv ci / tooj liab ntawv ci, attenuation Ntau dua lossis sib npaug li 40dB) thiab hlau braided shielding (tooj liab hlau braiding, kev pab them nqi ntau dua lossis sib npaug li 85%). Nyob rau hauv cov ntaub ntawv cables (xws li CAT6), ob chav shielding (aluminium foil + braiding) tuaj yeem txo cov lus sib tham kom qis dua 0.1%; nyob rau hauv lub hwj chim cables, steel daim kab xev armor (thickness 0.5mm ~ 1.2mm) muaj peev xwm ob leeg tiv thaiv electromagnetic teb thiab txhim khu kev tiv thaiv txhua yam (compressive zog ntau dua los yog sib npaug rau 10N / mm²).