Kev txiav txim siab yog tias lub photovoltaic DC cable yog kev laus yuav tsum muaj kev ntsuam xyuas zoo ntawm nws cov rwb thaiv tsev kev ua tau zoo, kev siv lub zog, thiab kev ua haujlwm ruaj khov, ua ke nrog kev tshuaj xyuas qhov muag, kev ntsuas hluav taws xob, kev soj ntsuam ib puag ncig, thiab cov qauv kev sim.
1. Kev tshuaj xyuas qhov muag
Saib xyuas cov kab mob saum npoo qhov muag pom lossis nrog cov cuab yeej magnifying:
Discoloration lossis Embrittlement: Cov rwb thaiv tsev ib txwm muaj cov xim sib xws (xws li dub, grey). Yellowing, whitening, los yog poob ntawm elasticity qhia cov khoom aging.
Cracks lossis delamination: Ua kom pom tseeb ntawm kev kuaj xyuas cov kab nrib pleb thiab sheath tev ntawm khoov thiab pob qij txha, tshwj xeeb tshaj yog tom qab raug tshav ntuj thiab los nag ntev.
Bulging lossis Deformation: Localized expansion tej zaum yuav yog vim nyob rau hauv cov dej noo los yog thermal aging ua rau ntim expansion.
Mechanical Damage: Txheeb xyuas cov ntawv txheeb, khawb, lossis cov cim tsiaj tom. Cov conductors raug nthuav tawm ua rau muaj kev pheej hmoo ntawm luv luv circuits.
2. Kev Ntsuas Hluav Taws Xob
Rwb thaiv tsev Resistance Test
Siv lub megohmmeter (piv txwv li, 500V / 1000V ntau) los ntsuas qhov rwb thaiv tsev tiv thaiv ntawm tus neeg xyuas pib thiab hauv av.
Kev tiv thaiv kev tiv thaiv ntawm cov cables tshiab yuav tsum siab dua lossis sib npaug li 100 MΩ·km. Yog tias nws qis dua 1 MΩ, nws qhia tias muaj kev tiv thaiv kev laus hnyav thiab yuav tsum tau hloov tam sim.
Cov ntaub ntawv yuav tsum tau sau tsis tu ncua. Yog tias qhov nruab nrab txhua xyoo txo qis dua 20%, nws qhia tias kev laus zuj zus.
