絕緣防火電纜對(dui)(dui)于充(chong)油電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)基(ji)本上沒有局部(bu)發(fa)電(dian)(dian)(dian)(dian)(dian)(dian)；油紙電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)即使(shi)有局部(bu)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)，通(tong)常也是很(hen)(hen)微弱(ruo)的(de)(de)(de)如幾個PC，因此(ci)這些電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)在(zai)出(chu)廠(chang)試(shi)驗中(zhong)可(ke)(ke)以不(bu)測(ce)(ce)局部(bu)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)。對(dui)(dui)于擠塑電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)，不(bu)但產(chan)生局部(bu)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)可(ke)(ke)能性大，而且局部(bu)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)對(dui)(dui)塑料(liao)、橡皮的(de)(de)(de)破壞(huai)也比(bi)較嚴重，隨著電(dian)(dian)(dian)(dian)(dian)(dian)壓等(deng)級的(de)(de)(de)提高(gao)，工(gong)作場(chang)強的(de)(de)(de)提高(gao)，這問題就顯得更加嚴重，因此(ci)對(dui)(dui)高(gao)壓擠塑電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)，在(zai)出(chu)廠(chang)試(shi)驗中(zhong)都(dou)要做局部(bu)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)測(ce)(ce)量(liang)。局部(bu)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)測(ce)(ce)量(liang)方法很(hen)(hen)多，可(ke)(ke)以根(gen)(gen)據(ju)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)產(chan)生的(de)(de)(de)瞬(shun)時電(dian)(dian)(dian)(dian)(dian)(dian)荷交換，測(ce)(ce)量(liang)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)脈沖(chong)（電(dian)(dian)(dian)(dian)(dian)(dian)測(ce)(ce)法）；也可(ke)(ke)根(gen)(gen)據(ju)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)時產(chan)生的(de)(de)(de)超聲波，測(ce)(ce)量(liang)其(qi)電(dian)(dian)(dian)(dian)(dian)(dian)壓，還可(ke)(ke)根(gen)(gen)據(ju)放(fang)(fang)(fang)(fang)電(dian)(dian)(dian)(dian)(dian)(dian)產(chan)生的(de)(de)(de)光，測(ce)(ce)量(liang)光的(de)(de)(de)強度。對(dui)(dui)于電(dian)(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)基(ji)本上都(dou)是采用電(dian)(dian)(dian)(dian)(dian)(dian)測(ce)(ce)法。

絕緣防火電纜老化試驗即是在應力作用下，能否保持性能穩定的穩定性試驗。熱老化試驗：簡單的熱老化試驗是考慮試驗品在熱的作用下發生老化的特性，把試品放在高于額定工作溫度溫度一定值的環境中，經歷規定時間后，測量某些敏感性能在老化前后的變化來評定老化特性。

絕緣防火電(dian)(dian)纜也(ye)可以(yi)用提高溫度加(jia)速試品(pin)老(lao)(lao)化(hua)，再加(jia)上受(shou)潮、震動、電(dian)(dian)場(chang)等熱、機(ji)、電(dian)(dian)等應力組成一個(ge)老(lao)(lao)化(hua)周期(qi)，每個(ge)老(lao)(lao)化(hua)周期(qi)之(zhi)后，測(ce)定(ding)(ding)(ding)(ding)某(mou)些(xie)選定(ding)(ding)(ding)(ding)的(de)敏感性(xing)能參數(shu)。直到該性(xing)能下降到表認壽(shou)命之(zhi)值，熱穩(wen)定(ding)(ding)(ding)(ding)性(xing)能是電(dian)(dian)纜通過(guo)電(dian)(dian)流的(de)同時還(huan)承受(shou)一定(ding)(ding)(ding)(ding)的(de)電(dian)(dian)壓，在經歷一定(ding)(ding)(ding)(ding)周期(qi)加(jia)熱之(zhi)后，測(ce)定(ding)(ding)(ding)(ding)某(mou)些(xie)敏剛(gang)的(de)性(xing)能參數(shu)來評定(ding)(ding)(ding)(ding)絕緣的(de)穩(wen)定(ding)(ding)(ding)(ding)性(xing)。

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