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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>廣東微機(jī)綜合保護(hù)系統(tǒng)公司,微機(jī)綜合保護(hù)系統(tǒng)</p><p><span>***更新：</span>2021-01-27 03:06:37</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="f5jfzie" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海麥哥思電氣有限公司</a></p><p><span>聯(lián)系人：</span>高先生</p><p><span>郵箱: </span>945506508@qq.com</p><p><span>電話: </span>18916582772</p><p><span>傳真: </span>021_33592772</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-33592771</p><p><span>地址: </span>元江路5500號第1幢</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="onuw98i" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="kovnxbc" class="box"><p><p style="text-indent:25px">目前國內(nèi)中、低壓柜母線保護(hù)的方法有哪些？答：（1）變壓器后備過流保護(hù)方案：目前應(yīng)用******的中，廣東微機(jī)綜合保護(hù)系統(tǒng)公司、低壓母線保護(hù)方案，在電網(wǎng)變電站里保護(hù)跳閘時間一般整定為 1.2-2.0s，在廠礦變電站里保護(hù)跳閘時一般整定為300-500ms, 顯然不能滿足快速切除中壓母線故障的要求。（2）饋線過流元件閉鎖進(jìn)線過流保護(hù)方案：近年來國外提出的利用微機(jī)過流保護(hù)實現(xiàn)的中、低壓母線保護(hù)方案。保護(hù)動作時間為300-400ms ，仍不能滿足100ms 以內(nèi)快速切除弧光短路故障的要求，且邏輯與接線較為復(fù)雜，沒有得到****的應(yīng)用，廣東微機(jī)綜合保護(hù)系統(tǒng)公司。（3）采用環(huán)流原理的高阻抗母線保護(hù)方案：某些重要工程曾采用的**中壓母線保護(hù)方案，保護(hù)動作時間一般為 35-60ms 。這種方案接線復(fù)雜、對CT的要求高，安裝在 3KV -35KV 母線上比較復(fù)雜，也很不經(jīng)濟(jì)。此外，廣東微機(jī)綜合保護(hù)系統(tǒng)公司，這種由于其保護(hù)范圍由于受到 CT 安裝位置的限制，不能保護(hù)到發(fā)生故障幾率較高的電纜接頭處的故障，并且也不能提供故障定位。因此在中壓母線保護(hù)也沒有得到****應(yīng)用。質(zhì)量微機(jī)綜合保護(hù)裝置生產(chǎn)商上海麥哥思電氣。廣東微機(jī)綜合保護(hù)系統(tǒng)公司</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東微機(jī)綜合保護(hù)系統(tǒng)公司,微機(jī)綜合保護(hù)系統(tǒng)" src="https://tyunfile.71360.com/UploadFile/shmgsdq/637244451985136719/8810575.jpg"></div><p style="text-indent:25px">另外，微機(jī)綜合保護(hù)裝置硬件選型還應(yīng)注意以下問題： 1). 采用封閉、加強(qiáng)型機(jī)箱，抗強(qiáng)振動、強(qiáng)干擾，安裝尺寸較小，適合于惡劣環(huán)境及柜體安裝。 2). 采用工業(yè)級雙CPU結(jié)構(gòu)，每個裝置內(nèi)包含一個主CPU及一個通訊CPU，兩CPU之間采用互檢方式工作，提高裝置的響應(yīng)時間及精度，避免保護(hù)裝置誤動作或拒動作，提高穩(wěn)定性和可靠性。 3). 全范圍溫度自動補(bǔ)償，裝置可長期工作在-20~+60C環(huán)境中。 4). 測量和保護(hù)信號在裝置內(nèi)分開處理，既可滿足精度要求又可滿足保護(hù)范圍及可靠性的要求。 5). 采用專門的頻率采樣電路，使得采樣頻率可精確地****電網(wǎng)頻率，使電氣量計算更精確。 6). 開關(guān)量輸入、輸出采用光電隔離措施，柜內(nèi)接線電纜采用屏蔽電纜，有效地防范外界干擾信號，提高裝置的抗干擾能力。 7). 采用大屏幕液晶顯示器及軟鍵盤，使得裝置數(shù)值顯示更清晰，操作更容易。遼寧口碑好微機(jī)綜合保護(hù)系統(tǒng)微機(jī)綜合保護(hù)系統(tǒng)推薦上海生產(chǎn)商麥哥思電氣。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東微機(jī)綜合保護(hù)系統(tǒng)公司,微機(jī)綜合保護(hù)系統(tǒng)" src="https://tyunfile.71360.com/UploadFile/shmgsdq/637244451982011719/6508946.jpg"></div><p style="text-indent:25px">智能弧光保護(hù)裝置的產(chǎn)品優(yōu)勢： 1.動作迅速可靠：采用了可靠的快速算法，可以在短時間內(nèi)判斷弧光變化信號和電流變化信號并迅速出口，從發(fā)現(xiàn)故障到出口跳閘時間間隔優(yōu)于7ms，確保開關(guān)柜內(nèi)設(shè)備的弧光在100ms以內(nèi)切除。 2.全數(shù)字化設(shè)計：智能弧光保護(hù)裝置采用全數(shù)字化設(shè)計，配置靈活，動作精度高，而且排除了由于旋鈕或其他機(jī)械設(shè)計導(dǎo)致的誤差****。 3.保護(hù)原理簡單、合理：根據(jù)弧光產(chǎn)生時的特點，AZ-EAP智能弧光保護(hù)裝置裝置采用弧光和電流雙重判據(jù)，判據(jù)簡單且可以有效的保證動作的準(zhǔn)確性</p><p style="text-indent:25px">公用測控屏柜的作用公用測控屏主要用于除間隔以外的模擬量（如母線電壓）、開關(guān)量（如GPS裝置）的采集。還可以通過串口通訊采集各裝置的內(nèi)部信息，這樣一個保護(hù)的信息基本可以做到一覽無余了，想投退保護(hù)都有記錄。發(fā)電機(jī)保護(hù)屏的主要特點發(fā)電機(jī)保護(hù)屏作為一個完整系統(tǒng)，具有的電源，CPU及的操作回路，完成對電站對應(yīng)間隔的保護(hù)、測量、控制等功能，各裝置在軟、硬件設(shè)計上是完全的，不依賴通訊網(wǎng)。發(fā)電機(jī)保護(hù)測控屏的主要用途發(fā)電機(jī)保護(hù)屏集保護(hù)、測量、通訊于一身、真正意義上實現(xiàn)無人值守。主要適用于中小型水電站和火電站項目，用于對水輪發(fā)電機(jī)組和汽輪發(fā)電機(jī)組的控制與保護(hù)。線路保護(hù)測控屏由哪幾部分組成？線路保護(hù)測控裝置、分段保護(hù)測控裝置、短線路光纖縱差保護(hù)裝置、備用電源自投裝置、柜體、電氣開元件和一些輔助線材組成。質(zhì)量微機(jī)綜合保護(hù)系統(tǒng)生產(chǎn)商上海麥哥思電氣。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東微機(jī)綜合保護(hù)系統(tǒng)公司,微機(jī)綜合保護(hù)系統(tǒng)" src="https://tyunfile.71360.com/UploadFile/shmgsdq/637244451983623047/465130.jpg"></div><p style="text-indent:25px">2）接地故障電弧起火：由于“接地故障發(fā)生的幾率遠(yuǎn)大于帶電導(dǎo)體間的短路”，所以“接地故障電弧引起的火災(zāi)遠(yuǎn)多于帶電導(dǎo)體間的電弧火災(zāi)”。這是因為“在電氣線路施工中，穿鋼管拉電線時帶電導(dǎo)體絕緣外皮之間并無因相對運(yùn)動而產(chǎn)生的摩擦，但帶電導(dǎo)體絕緣外皮與鋼管間的摩擦卻使絕緣摩薄或受損。另外，發(fā)生雷擊時地面上出現(xiàn)瞬變電磁場，它對電氣線路將感應(yīng)瞬態(tài)過電壓”，此時“芯線上感應(yīng)的瞬態(tài)過電壓是基本相同的，而電纜梯架則因接地而為地電壓”，所以，芯線對地的電位差較大。從摩損和電位差大兩方面分析，接地故障電弧起火率自然偏高。 3）爬電起火：爬電是指電弧不是建立在空氣間隙中的電弧，而是出現(xiàn)在設(shè)備絕緣表面上的電弧。例如電源插頭的絕緣表面上的一個或多個相線插腳和PE線插腳，它們之間的絕緣表面可能發(fā)生爬電。質(zhì)量微機(jī)綜合保護(hù)裝置上海麥哥思電氣。遼寧口碑好微機(jī)綜合保護(hù)系統(tǒng)</p><p style="text-indent:25px">質(zhì)量微機(jī)綜合保護(hù)系統(tǒng)麥哥思電氣。廣東微機(jī)綜合保護(hù)系統(tǒng)公司</p><p style="text-indent:25px">中、低壓開關(guān)柜內(nèi)電弧光產(chǎn)生的主要原因是什么？答：引起開關(guān)柜弧光短路故障的原因很多，一般分為以下5類： (1) 絕緣故障。主要是柜中絕緣材料爬距不足，未滿足加強(qiáng)絕緣要求，在臟污環(huán)境、天氣潮濕下發(fā)生絕緣故障。另一方面，由于絕緣材料材質(zhì)****，運(yùn)行時間年限較長，一些開關(guān)柜在強(qiáng)磁場電場作用下絕緣老化，也可能造成絕緣損壞而導(dǎo)致故障。 (2) 載流回路不良。如由于一些接頭截面不夠，緊固螺栓松動，手車柜觸頭接觸不良，在大電流流過時引起發(fā)熱、起火，進(jìn)而引起相間、相對地?fù)舸┑取?(3) 外來物體進(jìn)入。如小動物(老鼠等)進(jìn)入開關(guān)柜內(nèi)部，或維修人員在工作完成后將工具遺留在開關(guān)柜內(nèi)。 (4) 人為操作錯誤。如走錯間隔、誤操作、忘記對工作區(qū)域進(jìn)行接地和驗電等。 (5) 系統(tǒng)方面。如系統(tǒng)容量增大、接地方式的改變、電纜應(yīng)用的增多、保護(hù)及自控裝置配置不當(dāng)、系統(tǒng)諧振過電壓等。廣東微機(jī)綜合保護(hù)系統(tǒng)公司</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3026908.html</p></div></div></div></div></div><div id="bf2onof" class="page-right twoColRt"><div id="fubiczz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="qnxjiub" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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