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    高壓隔離開關(guān)工作機(jī)理

    2014/1/8 9:32:44      點(diǎn)擊:
    高壓隔離開關(guān)  保證了高壓電器及裝置在檢修工作時(shí)的安全,起隔離電壓的作用,不能用與切斷、投入負(fù)荷電流和開斷短路電流,僅可用于不產(chǎn)生強(qiáng)大電弧的某些切換操作,即是說它不具有滅弧功能;按安裝地點(diǎn)不同分為,屋內(nèi)式和屋外式,按絕緣支柱數(shù)目分為,單柱式,雙柱式和三柱式,各電壓等級(jí)都有可選設(shè)備。還可將高壓配電裝置中需要停電的部分與帶電部分可靠地隔離,以保證檢修工作的安全。高壓隔離開關(guān)的觸頭全部敞露在空氣中,具有明顯的斷開點(diǎn),隔離開關(guān)沒有滅弧裝置,因此不能用來切斷負(fù)荷電流或短路電流,否則在高壓作用下,斷開點(diǎn)將產(chǎn)生強(qiáng)烈電弧,并很難自行熄滅,甚至可能造成飛。ㄏ鄬(duì)地或相間短路),燒損設(shè)備,危及人身安全,這就是所謂“帶負(fù)荷拉隔離開關(guān)”的嚴(yán)重事故。
    高壓隔離開關(guān)還可以用來進(jìn)行某些電路的切換操作,以改變系統(tǒng)的運(yùn)行方式。例如:在雙母線電路中,可以用高壓隔離開關(guān)將運(yùn)行中的電路從一條母線切換到另一條母線上。
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