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        RW3跌落式開關

        更新:2013/9/26 13:19:49      點擊:
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        • 產(chǎn)品型號   RW3
        • 產(chǎn)品描述

          RW3跌落式開關,是上海人民電氣有限公司 http://www.mauscontracting.com 為您提供的關于RW3跌落式開關型號,RW3跌落式開關價格,有關RW3跌落式開關的相關資料,上海人民電氣有限公司...

        產(chǎn)品介紹

        跌落式熔斷器及拉負荷跌落式熔斷器是戶外高壓保護電器。它裝置在配電變壓器高壓側(cè)或配電線支干線路上、用作變壓器和線路的短路、過載保護及分、合負荷電流。跌落式熔斷器由絕緣支架和熔絲管二部分組成,靜觸頭安裝在絕緣支架兩端,動觸頭安裝在熔絲管兩端,熔絲管由內(nèi)層的消弧管和外層的酚醛紙管或環(huán)氧玻璃布管組成。拉負荷跌落式熔斷器增強彈性輔助觸頭及滅弧罩,用以分,合負荷電流。
        跌落式熔斷器在正常運行時,熔絲管借助熔絲張緊后形成閉合位置。當系統(tǒng)發(fā)生故障時,故障電流時熔絲迅速熔斷,并形成電弧,消弧管受電弧灼熱,分解出大量的氣體,使館內(nèi)形成很高壓力,并沿管道形成縱吹,電弧被迅速拉長而熄滅。熔絲熔斷后,下部動觸頭失去張力二下翻,鎖緊機械,釋放熔絲管,熔絲管跌落,形成明顯的開斷位置。當需要拉負荷時,用絕緣桿拉開動觸頭,此時主動、靜動觸頭仍然接觸,繼續(xù)用絕緣桿拉動觸頭,輔助觸頭也分離,在輔助觸頭之間產(chǎn)生電弧,電弧在滅罩狹縫中被拉長,同時滅弧罩產(chǎn)生氣體,在電流過零時,將電弧熄滅。

        壓器過載和短路保護,分合額定負荷電流只用,機械壽命≥2000次。
        1.適用于環(huán)境溫度上限40℃,下限-30℃之內(nèi)。
        2.海拔不超過1000m,風速不大于35m/s
        3.熔斷器不適用于下述場所
        3.1有燃料或爆炸危險的場所。
        3.2有劇烈震動或沖擊的場所。
        3.3有異電化學氣體作用及嚴重空氣污穢,煙霧地區(qū)。

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