真空開關管又可(ke)以稱(cheng)為真空滅弧室,它是真空開關中(zhong)的重要(yao)部(bu)件,隨著它的使用越來越廣(guang)泛,很多業內人士也開始(shi)關注該產(chan)品,想要(yao)了解該產(chan)品,我們首先應該要(yao)了解其基本機構和分類。 產(chan)品的基本結構...
按真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi)安(an)裝于開(kai)(kai)關設備的(de)不同(tong),可分為斷(duan)(duan)路器(qi)(qi)(qi)用(yong)(yong)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi)、負(fu)(fu)荷(he)開(kai)(kai)關用(yong)(yong)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi)、接觸器(qi)(qi)(qi)用(yong)(yong)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi)等。斷(duan)(duan)路器(qi)(qi)(qi)用(yong)(yong)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi),在(zai)操動(dong)機構(gou)的(de)控(kong)(kong)制下(xia),能(neng)開(kai)(kai)斷(duan)(duan)、關合(he)、承載(zai)(zai)運行線路的(de)正常(chang)(chang)電流(liu)(liu),也(ye)能(neng)在(zai)規定時(shi)間內(nei)承載(zai)(zai)、關合(he)及開(kai)(kai)斷(duan)(duan)規定的(de)異常(chang)(chang)電流(liu)(liu)(如(ru)短路電流(liu)(liu))。負(fu)(fu)荷(he)開(kai)(kai)關用(yong)(yong)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi),在(zai)操動(dong)機構(gou)的(de)控(kong)(kong)制下(xia),能(neng)關合(he)、開(kai)(kai)斷(duan)(duan)及承載(zai)(zai)線路的(de)正常(chang)(chang)電流(liu)(liu)(包括規定的(de)過載(zai)(zai)電流(liu)(liu)),也(ye)能(neng)在(zai)規定時(shi)間內(nei)承載(zai)(zai)規定的(de)異常(chang)(chang)電流(liu)(liu)(如(ru)短路電流(liu)(liu))。接觸器(qi)(qi)(qi)用(yong)(yong)真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi),能(neng)關合(he)、開(kai)(kai)斷(duan)(duan)及承載(zai)(zai)正常(chang)(chang)電流(liu)(liu)及規定的(de)過載(zai)(zai)電流(liu)(liu)。各類真(zhen)(zhen)(zhen)(zhen)(zhen)空(kong)(kong)滅(mie)弧(hu)室(shi)(shi)用(yong)(yong)途、性能(neng)、特點是不同(tong)的(de)。
用(yong)戶(hu)應根(gen)據不(bu)同的(de)(de)(de)(de)(de)使用(yong)場合,選擇不(bu)同類別的(de)(de)(de)(de)(de)開關設備及真(zhen)空(kong)(kong)(kong)滅(mie)弧室(shi)(shi)。例如(ru):線(xian)路(lu)中有時出現(xian)較大的(de)(de)(de)(de)(de)短(duan)路(lu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu),為(wei)防止事(shi)故擴大,需要開斷(duan)(duan)(duan)(duan)予以(yi)保護(hu),則(ze)選用(yong)真(zhen)空(kong)(kong)(kong)斷(duan)(duan)(duan)(duan)路(lu)器(qi)(qi)及斷(duan)(duan)(duan)(duan)路(lu)器(qi)(qi)用(yong)真(zhen)空(kong)(kong)(kong)滅(mie)弧室(shi)(shi)。正常(chang)負(fu)荷(he)中出現(xian)的(de)(de)(de)(de)(de)短(duan)路(lu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)或過(guo)載電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu),則(ze)可(ke)通過(guo)限流(liu)(liu)(liu)(liu)熔斷(duan)(duan)(duan)(duan)器(qi)(qi)與真(zhen)空(kong)(kong)(kong)負(fu)荷(he)開關相(xiang)互(hu)串聯進(jin)行(xing)開斷(duan)(duan)(duan)(duan)。由限流(liu)(liu)(liu)(liu)熔斷(duan)(duan)(duan)(duan)器(qi)(qi)開斷(duan)(duan)(duan)(duan)短(duan)路(lu)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu),由真(zhen)空(kong)(kong)(kong)負(fu)荷(he)開關開斷(duan)(duan)(duan)(duan)過(guo)載電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(出現(xian)所謂的(de)(de)(de)(de)(de)轉移(yi)電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)或交接電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu))及額定電(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)等,而選用(yong)負(fu)荷(he)開關用(yong)真(zhen)空(kong)(kong)(kong)滅(mie)弧室(shi)(shi)。同樣(yang)容量的(de)(de)(de)(de)(de)真(zhen)空(kong)(kong)(kong)斷(duan)(duan)(duan)(duan)路(lu)器(qi)(qi)和帶(dai)限流(liu)(liu)(liu)(liu)熔斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)(de)(de)真(zhen)空(kong)(kong)(kong)負(fu)荷(he)開關相(xiang)比,帶(dai)限流(liu)(liu)(liu)(liu)熔斷(duan)(duan)(duan)(duan)器(qi)(qi)的(de)(de)(de)(de)(de)真(zhen)空(kong)(kong)(kong)負(fu)荷(he)開關要便宜很多。
對于(yu)(yu)感性負載如電(dian)機或電(dian)弧爐變壓器(qi)等(deng),則(ze)選用(yong)(yong)熔(rong)斷器(qi)與真(zhen)空接觸器(qi)構成的(de)組合(he)電(dian)器(qi)較為合(he)適(shi)。因為接觸器(qi)用(yong)(yong)真(zhen)空滅(mie)弧室的(de)截(jie)流值(zhi)低(一(yi)般在(zai)3A以下(xia),而斷路器(qi)用(yong)(yong)真(zhen)空滅(mie)弧室的(de)截(jie)流值(zhi)為3~10A左右),回路產生(sheng)的(de)過電(dian)壓低。且其機械壽(shou)命和電(dian)壽(shou)命都(dou)很(hen)高,適(shi)于(yu)(yu)頻(pin)繁(fan)操作的(de)場合(he)。
真(zhen)(zhen)空(kong)滅弧(hu)室(shi)的參數(shu)(shu)要(yao)(yao)根據(ju)實際(ji)情(qing)況選(xuan)擇(ze)。如額定(ding)短(duan)路開斷(duan)電(dian)(dian)流、額定(ding)電(dian)(dian)流等,并不是越大越好,適當留有一定(ding)的安(an)全系數(shu)(shu)就(jiu)(jiu)可以了(le)。從實際(ji)使(shi)(shi)用情(qing)況看,有時由于線路過(guo)電(dian)(dian)壓造成極間(jian)放(fang)電(dian)(dian)等原因(yin),波及(ji)真(zhen)(zhen)空(kong)滅弧(hu)室(shi)而使(shi)(shi)其損壞(huai)(多(duo)出現在電(dian)(dian)弧(hu)爐(lu)電(dian)(dian)路中)。但因(yin)為過(guo)流而損壞(huai)的幾(ji)乎沒有。如果真(zhen)(zhen)空(kong)滅弧(hu)室(shi)的機械壽(shou)命(ming)(ming)終了(le),就(jiu)(jiu)漏氣失(shi)效了(le),即使(shi)(shi)電(dian)(dian)壽(shou)命(ming)(ming)余(yu)量再大,也需(xu)要(yao)(yao)更(geng)換真(zhen)(zhen)空(kong)滅弧(hu)室(shi)了(le)。參數(shu)(shu)選(xuan)的過(guo)高(gao),費用就(jiu)(jiu)會增高(gao)。
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