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            高壓電纜頭制作的基本要求

            電纜終端頭是將電纜與其他電氣設備連接的部件,電纜中間頭是將兩根電纜連接起來(lái)的部件,電纜終端頭與中間頭統稱(chēng)為電纜附件,包括熱縮電纜附件(也稱(chēng)熱縮電纜頭)、冷縮電纜附件(也稱(chēng)冷縮電纜頭)等。電纜附件應與電纜本體一樣能長(cháng)期安全運行,并具有與電纜相同的使用壽命。良好的電纜附件應具有以下性能:   線(xiàn)芯聯(lián)接好: 主要是聯(lián)接電阻小而且聯(lián)接穩定,能經(jīng)受起故障電流的沖擊;長(cháng)期運行后其接觸電阻不應大于電纜線(xiàn)芯本體同長(cháng)度電阻的1.2倍;應具有一定的機械強度、耐振動(dòng)、耐腐蝕性能;此外還應體積小、成本低、便于現場(chǎng)安裝?!〗^緣性能好: 電纜附件的絕緣性能應不低于電纜本體,所用絕緣材料的介質(zhì)損耗要低,在結構上應對電纜附件中電場(chǎng)的突變能完善處理,有改變電場(chǎng)分布的措施。

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