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style="text-indent:25px">成套基礎(chǔ)知識(shí)：1、什么是高壓隔離開關(guān)？它有何用途？它是一種沒有滅弧裝置的開關(guān)設(shè)備，一般只用來關(guān)合和開斷有電壓無負(fù)荷的線路。主要用在斷路器分閘后建立可靠的絕緣間隙，將被檢修線路和調(diào)和與電源隔開，根據(jù)運(yùn)行需要換接線路，以及開斷和關(guān)合短線路的充電電流和小容量的空載變壓器的勵(lì)磁電流。2、什么是接地開關(guān)？它有何用途？接地開關(guān)就是用于將回路接地的一種機(jī)械式開關(guān)裝置。它通常裝在降壓變壓器的高壓側(cè)。當(dāng)輸電線路向只有一個(gè)變壓器的終端電站供電時(shí)，在受電端發(fā)生故障的情況下，接地開關(guān)應(yīng)關(guān)合，造成人為接地短路，迫使送電端分閘，切斷故障。低壓開關(guān)柜可以根據(jù)不同的電氣負(fù)荷優(yōu)先級(jí)進(jìn)行調(diào)整和分配。遼寧低壓配電箱定制</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="遼寧低壓配電箱定制,低壓開關(guān)柜" src="https://img01.71360.com/file/read/www/M00/25/7B/rBwBHmSj0K-AfvRwAAP96Xx6dqA587.png"></p><p style="text-indent:25px">本次介紹的低壓開關(guān)柜適用于交流400伏的一個(gè)系統(tǒng)。低壓開關(guān)柜主要是由柜體你、一次元器件、二次元器件、母排等組成；開關(guān)柜的寬度一般有600cm、800cm、1m、1.2m、，深度一般有600cm、800cm、1m，高度一般為2.2m。一套完整的開關(guān)柜系統(tǒng)，一般有進(jìn)線柜、無功補(bǔ)償柜、饋線柜雙電源柜等組成。打開門我們會(huì)看到低壓框架斷路器，左邊是二次端子；關(guān)上門，儀表門上依次有數(shù)顯表、指示燈、按鈕；進(jìn)線柜后面會(huì)看到計(jì)量用的電流互感器、測(cè)量用電流互感器、進(jìn)線柜的浪涌保護(hù)器。抽屜式低壓開關(guān)柜費(fèi)用低壓開關(guān)柜可以應(yīng)用于智能家居和智能建筑領(lǐng)域。</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="遼寧低壓配電箱定制,低壓開關(guān)柜" src="https://img01.71360.com/file/read/www/M00/25/7A/rBwBHmSj0IyAFxyvAAPSYbCOpcM269.png"></p><p style="text-indent:25px">目前應(yīng)用較廣的有電磁阻尼式、空氣阻尼式、電動(dòng)機(jī)式和電子式時(shí)間繼電器。按延時(shí)方式可分為以下兩類：1.通電延時(shí)型。該繼電器線圈在獲得輸入信號(hào)（或通電）后，立即開始延時(shí)，待延時(shí)完，其執(zhí)行部分（即觸頭）才輸出信號(hào)（即動(dòng)作）。當(dāng)輸入信號(hào)消失，繼電器恢復(fù)動(dòng)作前狀態(tài)。其動(dòng)作情況，即從線圈通電到觸頭動(dòng)作所經(jīng)歷的時(shí)間（T）稱通電延時(shí)時(shí)間。2.斷電延時(shí)型。該繼電器與前者相反，當(dāng)獲得輸入信號(hào)（通電）后，執(zhí)行部分立即輸出信號(hào)，當(dāng)輸入信號(hào)消失，（斷電）繼電器經(jīng)一定延時(shí)，才能恢復(fù)到動(dòng)作前狀態(tài)，從線圈斷電到觸頭復(fù)位所需時(shí)間為斷電延時(shí)時(shí)間。</p><p style="text-indent:25px">有關(guān)成套設(shè)備型號(hào)含義：低壓BSL：B表示低壓；S表示雙面維護(hù)；L表示動(dòng)力。GGD：G1表示交流低壓配電屏；G2表示元件固定、固定接線；D表示電力用柜。動(dòng)力箱XL—10，X—箱式結(jié)構(gòu)；L—?jiǎng)恿ε潆?；F—防塵；M—照明；R—嵌入式；W—戶外。GG—1A，GG：固定式高壓開關(guān)柜。XGN：X—箱式開關(guān)柜；G—固定式；N—戶內(nèi)裝置。有關(guān)國(guó)家標(biāo)準(zhǔn)含義：GB—國(guó)家標(biāo)準(zhǔn)；JG—建筑工業(yè)標(biāo)準(zhǔn)；DL—電力工業(yè)標(biāo)準(zhǔn)；JB—機(jī)械工業(yè)標(biāo)準(zhǔn)。SDJ—水力工業(yè)標(biāo)準(zhǔn)。在成套配電系統(tǒng)中，工作與控制的電壓有交流（AC）直流（DC）之區(qū)分，“J、Z”、AC、DC、（+、—），交流額定電壓有380V、220V、10kV、6kV，簡(jiǎn)稱低壓、高壓。低壓開關(guān)柜可以提供電氣設(shè)備的遠(yuǎn)程報(bào)警和監(jiān)控功能。</p><p style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="遼寧低壓配電箱定制,低壓開關(guān)柜" src="https://img01.71360.com/file/read/www/M00/25/7A/rBwBHmSj0KqAYbCnAAW_hxH26hY445.png"></p><p style="text-indent:25px">電路圖有一次系統(tǒng)圖、電器平面布置圖、控制保護(hù)圖（又稱原理圖）、二次接線安裝圖，我們作為參與生產(chǎn)、安裝成套產(chǎn)品者應(yīng)該知道、懂得、熟悉系統(tǒng)中大部分圖形、文字、符號(hào)、代號(hào)、作用與功能、含義。在電氣施工圖中常用的符號(hào)含義：U：電壓，單位“V”；I：電流，單位“A”；R：電阻，單位“Ω”；U：額定電壓；UE：額定工作電壓；UI：額定絕緣電壓；UC：額定輔助電路電壓；IE：額定工作電流；I：電流瞬時(shí)值；ICW：額定短時(shí)耐變電流；COSΦ：功率因素；AC：交流；DC：直流；IP：外殼防護(hù)等級(jí)；PE：保護(hù)導(dǎo)體；N：中性導(dǎo)體；PEN：接地的中性導(dǎo)體；安全工作電壓：50V；安全工作電流：30MA；安全工作電阻：1700Ω。低壓開關(guān)柜可以提供可靠的電氣分配和控制功能。抽屜式低壓開關(guān)柜費(fèi)用</p><p style="text-indent:25px">低壓開關(guān)柜具有靈活的布局和可擴(kuò)展性，適應(yīng)不同規(guī)模和需求的電力系統(tǒng)。遼寧低壓配電箱定制</p><p style="text-indent:25px">成套基礎(chǔ)知識(shí)：1、什么叫墊過載脫扣器？利用流過脫扣器電流產(chǎn)生的墊效應(yīng)（包括延時(shí)）而反時(shí)限動(dòng)作的脫扣器。2、什么叫分勵(lì)脫扣器？由電壓源激勵(lì)的脫扣器（該電源與主電路電壓無關(guān)）。3、什么叫欠電壓脫扣器？當(dāng)脫扣器的端電壓降至某一規(guī)定值范圍時(shí)，使電器有延時(shí)，延幾條地動(dòng)作的脫扣器，（欠電壓脫扣器在85%額定電壓及以上時(shí)，電器能正常閉合，在70%額定電壓及以上時(shí)能保證不能斷開，在35%額定電壓以下時(shí)，應(yīng)能釋放的脫扣器。）4、什么叫開距？開關(guān)在斷開位置時(shí)，動(dòng)靜觸頭向與其連接導(dǎo)體的總電氣間隙。遼寧低壓配電箱定制</p></div> </div> <div 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