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    HRW11跌落式開關

    更新:2013/9/26 13:16:41      點擊:
    • 產品品牌   
    • 產品型號   HRW11
    • 產品描述

      HRW11跌落式開關,是上海人民電氣有限公司 http://www.hqbet5695.com 為您提供的關于HRW11跌落式開關型號,HRW11跌落式開關價格,有關HRW11跌落式開關的相關資料,上海...

    產品介紹

    被廣泛應用于12kV/15KV配電線路和配電變壓器一次側作為保護和進行設備投、切操作之用。?? 主要分為:陶瓷跌落式開關跟硅橡膠跌落式開關,主要型號:RW3/RW7/RW9/RW10/RW11,硅橡膠隔離開關在型號前面加“H”,根據(jù)地區(qū)的不同,產品的外形也有所不同,隨著現(xiàn)在技術的發(fā)展,現(xiàn)在硅橡膠跌落式開關用途廣泛。?? 一般情況下不允許帶負荷操作跌落式開關,只允許其操作空載設備(線路)。但在農網10kV配電線路分支線和額定容量小于200kVA的配電變壓器允許按下列要求帶負荷操作:?? (1) 操作時由兩人進行(一人監(jiān)護,一人操作),但必須戴經試驗合格的絕緣手套,穿絕緣靴、戴護目眼鏡,使用電壓等級相匹配的合格絕緣棒操作,在雷電或者大雨的氣候下禁止操作。?? (2) 在拉閘操作時,一般規(guī)定為先拉斷中間相,再拉背風的邊相,最后拉斷迎風的邊相。這是因為配電變壓器由三相運行改為兩相運行,拉斷中間相時所產生的電弧火花最小,不致造成相間短路。其次是拉斷背風邊相,因為中間相已被拉開,背風邊相與迎風邊相的距離增加了一倍,即使有過電壓產生,造成相間短路的可能性也很小。最后拉斷迎風邊相時,僅有對地的電容電流,產生的電火花則已很輕微。?? (3) 合閘的時候操作順序拉閘時相反,先合迎風邊相,再合背風的邊相,最后合上中間相。?? (4) 操作熔管是一項頻繁的項目,注意不到便會造成觸頭燒 傷引起接觸不良,使觸頭過熱,? 彈簧退火,促使觸頭接觸更為不良,形成惡性循環(huán)。

    1、環(huán)境溫度:-40℃~40℃; 
    2、海拔不超過1000m;
    3、風速不大于35m/s;
    4、地震烈度不超過8度;
    5、熔斷器不適用于下述場所:
    a、有燃燒或爆炸危險的場所;
    b、有劇烈震動或沖擊的場所;
    c、有異電化學氣體作用及嚴重空氣污穢,鹽霧地區(qū)。
     

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