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避(bi)雷(lei)器(qi)是(shi)電(dian)力(li)係(xi)統(tong)很(hen)重(zhong)要(yao)的(de)一(yi)種(zhong)電(dian)氣(qi)保(bao)護(hu)裝(zhuang)置(zhi),能(neng)夠(gou)有(you)效(xiao)的(de)限(xian)製(zhi)電(dian)網(wang)過(guo)電(dian)壓(ya)幅(fu)值(zhi),從(cong)而(er)有(you)效(xiao)保(bao)護(hu)電(dian)器(qi)設(she)備(bei)免(mian)遭(zao)過(guo)電(dian)壓(ya)的(de)危(wei)害(hai)。金(jin)屬(shu)氧(yang)化(hua)鋅(xin)避(bi)雷(lei)器(qi)(MOA, Metal Oxide Arrester)是shi最zui常chang用yong的de一yi種zhong,在zai長chang期qi的de運yun行xing中zhong,由you於yu金jin屬shu氧yang化hua鋅xin避bi雷lei器qi長chang期qi承cheng受shou著zhe運yun行xing電dian壓ya,內nei部bu的de閥fa片pian會hui逐zhu漸jian老lao化hua,同tong時shi結jie構gou工gong藝yi上shang的de瑕xia疵ci也ye容rong易yi導dao致zhi密mi封feng不bu嚴yan,閥fa片pian容rong易yi受shou潮chao,會hui進jin一yi步bu破po壞huai避bi雷lei器qi的de性xing能neng,泄xie漏lou電dian流liu也ye會hui進jin一yi步bu增zeng大da。泄xie漏lou電dian流liu中zhong的de阻zu性xing成cheng分fen將jiang產chan生sheng有you功gong損sun耗hao,產chan生sheng的de熱re量liang會hui導dao致zhi閥fa片pian的de溫wen度du升sheng高gao,嚴yan重zhong時shi可ke能neng形xing成cheng熱re崩beng潰kui,導dao致zhi避bi雷lei器qi損sun壞huai甚shen至zhi爆bao炸zha,從cong而er可ke能neng引yin發fa電dian力li係xi統tong事shi故gu。