Cov xov hlau uas muaj ntaub thaiv, raws li lub npe qhia, yog ib txoj hlua uas muaj peev xwm tiv thaiv kev cuam tshuam hluav taws xob sab nraud uas tsim los ua ib txoj hlua xa xov nrog ib txheej tiv thaiv. Qhov hu ua "shielding" ntawm cov qauv cable kuj yog ib qho kev ntsuas los txhim kho kev faib tawm ntawm cov teb hluav taws xob. Tus neeg xyuas hluav taws xob ntawm txoj hlua yog tsim los ntawm ntau txoj hlua hlau, uas yooj yim los tsim qhov sib txawv ntawm nws thiab txheej rwb thaiv tsev, thiab qhov chaw ntawm tus neeg xyuas hluav taws xob tsis du, uas yuav ua rau muaj kev sib sau ua ke ntawm cov teb hluav taws xob.
1. Txheej tiv thaiv kab hlau
(1). Ntxiv ib txheej tiv thaiv ntawm cov khoom siv semi-conductive rau ntawm qhov chaw ntawm tus neeg xyuas hluav taws xob, uas yog equipotential nrog tus neeg xyuas hluav taws xob tiv thaiv thiab nyob rau hauv kev sib cuag zoo nrog txheej rwb thaiv tsev, yog li ntawd kom tsis txhob muaj kev tawm ib nrab ntawm tus neeg xyuas hluav taws xob thiab txheej rwb thaiv tsev. Txheej tiv thaiv no kuj tseem hu ua txheej tiv thaiv sab hauv. Kuj tseem yuav muaj qhov sib txawv ntawm qhov sib cuag ntawm qhov chaw rwb thaiv tsev thiab lub hnab, thiab thaum lub cable raug khoov, qhov chaw rwb thaiv tsev ntawm cov roj-ntawv cable yooj yim ua rau tawg, uas yog cov yam uas ua rau muaj kev tawm ib nrab.
(2). Ntxiv ib txheej tiv thaiv ntawm cov khoom siv semi-conductive rau ntawm qhov chaw ntawm cov txheej rwb thaiv tsev, uas muaj kev sib cuag zoo nrog cov txheej rwb thaiv tsev tiv thaiv thiab muaj peev xwm sib npaug nrog lub plhaub hlau, kom tsis txhob muaj kev tawm ib nrab ntawm cov txheej rwb thaiv tsev thiab lub plhaub.
Yuav kom ua tau raws li lub hauv paus thiab rwb thaiv hluav taws xob, cov xov hluav taws xob nruab nrab thiab siab 6kV feem ntau muaj ib txheej tiv thaiv tus neeg coj hluav taws xob thiab ib txheej tiv thaiv rwb thaiv tsev, thiab qee cov xov hluav taws xob qis tsis muaj txheej tiv thaiv. Muaj ob hom txheej tiv thaiv: semi-conductive shielding thiab hlau tiv thaiv.
2. Cov xov hlau tiv thaiv
Cov txheej tiv thaiv ntawm cov xov hlau no feem ntau yog braided rau hauv ib lub network ntawm cov xov hlau lossis ib zaj duab xis hlau, thiab muaj ntau txoj hauv kev sib txawv ntawm ib qho kev tiv thaiv thiab ntau qhov kev tiv thaiv. Ib qho kev tiv thaiv txhais tau tias yog ib qho kev tiv thaiv net lossis zaj duab xis tiv thaiv, uas tuaj yeem qhwv ib lossis ntau cov xov hlau. Hom kev tiv thaiv ntau yog ntau lub network tiv thaiv, thiab zaj duab xis tiv thaiv nyob hauv ib lub cable. Qee qhov siv los cais cov kev cuam tshuam electromagnetic ntawm cov xov hlau, thiab qee qhov yog ob txheej tiv thaiv siv los txhawb cov nyhuv tiv thaiv. Lub tshuab ntawm kev tiv thaiv yog av cov txheej tiv thaiv kom cais cov hluav taws xob cuam tshuam ntawm cov xov hlau sab nraud.
(1). Daim ntaub thaiv semi-conductive
Cov txheej tiv thaiv semi-conductive feem ntau yog teeb tsa rau ntawm qhov chaw sab nraud ntawm lub plawv hlau conductive thiab qhov chaw sab nraud ntawm cov txheej rwb thaiv tsev, feem ntau hu ua txheej tiv thaiv semi-conductive sab hauv thiab txheej tiv thaiv semi-conductive sab nraud. Cov txheej tiv thaiv semi-conductive yog tsim los ntawm cov khoom siv semi-conductive uas muaj qhov tsis kam qis heev thiab tuab nyias. Cov txheej tiv thaiv semi-conductive sab hauv yog tsim los ua kom lub zog hluav taws xob sib npaug ntawm qhov chaw sab nraud ntawm lub plawv hlau conductor thiab zam kev tso tawm ib feem ntawm cov hlau conductor thiab rwb thaiv tsev vim qhov chaw tsis sib npaug ntawm cov hlau conductor thiab qhov sib txawv ntawm huab cua los ntawm lub plawv hlau stranded. Cov hlau semi-conductive sab nraud yog nyob rau hauv kev sib cuag zoo nrog qhov chaw sab nraud ntawm cov txheej rwb thaiv tsev, thiab yog equipotential nrog lub plhaub hlau kom tsis txhob muaj kev tso tawm ib feem nrog lub plhaub hlau vim muaj qhov tsis zoo xws li tawg ntawm qhov chaw rwb thaiv tsev cable.
(2). Lub ntaub thaiv hlau
Rau cov xov hluav taws xob nruab nrab thiab qis tsis muaj cov hlau sheaths, ntxiv rau kev teeb tsa ib txheej semi-conductive shield, tab sis kuj ntxiv ib txheej hlau shield. Cov txheej hlau shield feem ntau yog qhwv los ntawmdaim kab xev tooj liablos yog hlau tooj liab, uas feem ntau ua lub luag haujlwm ntawm kev tiv thaiv lub teb hluav taws xob.
Vim tias qhov tam sim no los ntawm lub xov hluav taws xob loj heev, lub teb sib nqus yuav raug tsim nyob ib puag ncig qhov tam sim no, kom tsis txhob cuam tshuam rau lwm yam khoom, yog li cov txheej tiv thaiv tuaj yeem tiv thaiv lub teb hluav taws xob no hauv lub cable. Tsis tas li ntawd, cov txheej tiv thaiv cable tuaj yeem ua lub luag haujlwm hauv kev tiv thaiv av. Yog tias lub cable core puas lawm, cov tam sim no xau tuaj yeem ntws raws li cov dej ntws laminar tiv thaiv, xws li lub network av, los ua lub luag haujlwm hauv kev tiv thaiv kev nyab xeeb. Nws tuaj yeem pom tias lub luag haujlwm ntawm cov txheej tiv thaiv cable tseem loj heev.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-14-2024