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href="news_160.html">行業知識</a> ? <a>挖沙船發電機的外部短路保護措施</a> </div> </div></div> <div style="clear:both"></div> </div></div><div id="mfid7" class="mf" style="margin: 15px; width: 96.8586%;"><div id="_ctl5_box" class="box166_1"> <div class="title"> <h2 class="title1" style="font-size: 20px; color: #333; margin-bottom: 10px; font-weight: normal;">挖沙船發電機的外部短路保護措施</h2> <p> <span class="fromF">來源：</span> <span class="timeM">時間：2019-08-12 09:29:22</span> <span class="timeM">瀏覽次數：<label id="_ctl5_ClickRead" class="ClickRead"></label></span> </p> </div> <div class="contMain"> <div id="_ctl5_nsNoteDiv" class="tiyao">像我們常用的挖沙船低壓發電機的電壓大多在50OV以下，實際上發電機內部發生短路的概率相當小，在加上我們在使用過程中都會進行定期的絕緣檢查，因此大多數企業一般不會給發電機配備內部保護裝置。短路的概率小并不等于完全沒有可能，而且挖沙船發電機的外部一旦發生短路將產生巨大的短路電流，</div> <div class="content"> <div id="_ctl5_nsContentDiv" class="nscontent"><p style="text-indent:2em;"> 像我們常用的<strong><u><a href="http://www.cosanvuongiare.com"><span style="color:#ff0000;">挖沙船</span></a></u></strong>低壓發電機的電壓大多在50OV以下，實際上發電機內部發生短路的概率相當小，在加上我們在使用過程中都會進行定期的絕緣檢查，因此大多數企業一般不會給發電機配備內部保護裝置。 </p> <p style="text-indent:2em;"> 短路的概率小并不等于完全沒有可能，而且挖沙船發電機的外部一旦發生短路將產生巨大的短路電流，它對電力系統設備有巨大的破壞作用，將造成電網電壓急劇下降，使得電動機停轉甚至跳閘引起全船停電，所以我么總結了一些挖沙船發電機的外部短路保護措施，下面就為大家展開講解一下。 </p> <p align="center"> <img src="/uFile/90212/image/201981293332942.jpg" alt="挖沙船發電機的外部短路保護措施" title="挖沙船發電機的外部短路保護措施" width="450" height="300" align="" /> </p> <p style="text-indent:2em;"> 挖沙船發電機的外部短路保護原則是既要保護發電機，又要盡可能不中斷供電。為兼顧保護的快速性和選擇性，通常采用時間原則和電流原則相結合的方法。 </p> <p style="text-indent:2em;"> 挖沙船的發電機的外部短路保護裝置中，一般設有兩套電流保護裝置，他們分別時短路短延時保護和短路瞬時動作保護，短路短延時保護的啟動電流整定為3～5倍的發電機額定電流，動作時限整定為0.2～0.6s，作用于發電機跳閘;短路瞬時動作保護的啟動電流整定為5～10倍的發電機額定電流，作用于發電機跳閘。 </p> <p style="text-indent:2em;"> 它們根據短路電流的大小實行短延時或瞬時動作保護。發電機的外部短路保護由自動空氣斷路器中的過電流脫扣器，或由綜合保護裝置中的過電流繼電器實現，或由多個保護裝置共同作用實現。 </p> <p style="text-indent:2em;"> 關于<strong><span style="color:#ff0000;">挖沙船</span></strong>發電機的外部短路保護措施的相關講解就先簡單的為您介紹到這里，希望通過以上內容的介紹，能對您有所幫助。<span style="color:#337FE5;">如果您還想進一步了解，可以咨詢廠家熱線：0536-3837236/3836888</span> </p> <p style="text-indent:2em;"> <br /> </p></div> <div id="nsKey" class="key" >關鍵字：<a href="search.html?sear_key=挖沙船" target="_blank">挖沙船</a> <a href="search.html?sear_key=挖沙船發電機的外部短路保護措施" target="_blank">挖沙船發電機的外部短路保護措施</a> </div> <div id="nsKey1" class="key" >本文網址：<a href="http://www.cosanvuongiare.com/news_view_400_160.html">http://www.cosanvuongiare.com/news_view_400_160.html</a></div> <div id="_ctl5_isHidePage" class="change"> <p>上一篇：<a href="news_view_326_160.html">影響絞吸式挖沙船價格的因素有哪些？</a></p> <p>下一篇：<a href="news_view_376_160.html">挖沙船故障的類型以及故障的原因</a></p> <p><span><a href="javascript:history.go(-1)">返回</a></span></p> </div> </div> <div class="newslist" > <h2>相關新聞</h2> <ul> <li> <a href="news_view_422_160.html" title="絞吸式挖泥船的鉸刀是如何轉動的?"> 絞吸式挖泥船的鉸刀是如何轉動的? </a> </li> <li> <a href="news_view_245_160.html" 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