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if (JS_ChkReg(keyWords, "^[中文\\w][中文\\w\\-\\+\\(\\)\\,，、]*$") == false) { if (keyWords == "") { alert("請輸入搜索關鍵詞！"); } else { alert("查找關鍵字只能是中文或者英文數字"); } $("#keyword").focus(); return false; } else { return true; } }); </script> <div class="publicWidth pageLocation"> <a href="/" class="title1">首頁</a> >><a href="/list/?167.html">NF社區</a> >><a href="/list/?262_1.html">行業快訊</a> </div> <div class="publicWidth articleDetails"> <h1 id="article-title"> 電機綜合保護器技術探討 </h1> <div class="inforArticle"> <span class="author"> <strong>作者：</strong>?？滤? <strong>來源：</strong>網絡 <strong>發布：</strong> 2014-4-5 14:25:35 </span> <span class="fontsize">[<a href="javascript:articleSize('16','30')">大</a>] [<a href="javascript:articleSize('14','24')">中</a>] [<a href="javascript:articleSize('12','21')">小</a>]</span> </div> <div id="article" class="word"> <br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">一．為什么傳統的電機綜合保護器保護效果不甚理想？</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">傳統的</font></font><a href="www.003lm.com" target="_blank"><font color="#000000"><b>電機綜合保護器</b></font></a><font color="#323232"><font face="Arial, Helvetica, sans-serif">保護裝置以熔斷器、熱繼電器為主。</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">熔斷器是使用最早、最簡單的保護裝置。其實，熔斷器主要是用于短路故障時，斷開供電線路，減小故障范圍的擴大。認為熔斷器可以保護電機短路或過載，不按電機的起動電流選擇熔絲，而是按額定電流來選擇，是不科學的。豈不知，這樣更容易造成電動機因斷相運行而損壞電機。</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">熱繼電器是應用最廣的電機過載保護裝置。但熱繼電器功能單一，靈敏度低、誤差大、穩定性差，已為廣大電氣者所認識，所有這些缺陷造成電機保護不可靠。事實也正是這樣；盡管許多設備安裝了熱繼電器，但電機損壞而影響正常生產的現象還是存在。</font></font><font color="#323232"><font face="Arial, Helvetica, sans-serif">二．為什么現在的電動機比過去更容易燒毀？</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">由于絕緣技術的不斷發展，在電動機的設計上要求增加出力，又要求減小體積，使新型電動機的熱容量越來越小，過負荷能力越來越弱；再由于生產自動化程度的提高，要求電動機經常運行在頻繁的起動、制動、正反轉以及變負荷等多種方式，對<b>電機綜合保護器</b>裝置沒提出了更高的要求。另外，電動機的應用面更廣于環境極為惡劣的場合，如潮濕、高溫、多塵、腐蝕等場合。再加上電機修造上的不規范，設備管理上的疏漏。所有這些，造成了現在的電動機比過去更容易損壞。</font></font> <br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">三、理想的<b>電機綜合保護器</b>？</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">理想的<b>電動機保護器</b>不是功能最多，也不是所謂最先進的，而是應該最實用的。</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">什么是實用呢？實用應滿足可靠、經濟、方便等要素，具有較高的性能比。</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">可靠性:可靠首先應滿足功能的可靠，如過電流、斷相功能必須對各種場所、各種過程、各種方式發生的過電流、斷相均能可靠的保護動作。其次自身的可靠（既然保護器是保護別的，尤其應具有很高的可靠性）必須具有對各種惡劣環境的適應性穩定性、耐久性。</font></font> <br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">四．<b>電機綜合保護器</b>選擇的原則？</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif">選用電動機保護器的目的:既能使電動機充分發揮過載能力，又能免于損壞，而且還能提高電力拖動系統的可靠性和生產的連續性。同時選擇保護裝置時，必須考慮幾個互相矛盾的因素，即可靠性、經濟性、結構簡單、操作、維護方便等。在能滿足保護要求的情況下首先考慮最簡單保護裝置，只有當簡單的保護裝置不能滿足要求時，或對保護特性提出更高要求時，才考慮應用復雜的保護裝置。</font></font><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif"><b>電機綜合保護器</b>方便性：必須在安裝、使用、調整、接線等方面，至少應類同于熱繼電器，盡可能的更簡易方便。</font></font><br /><br /><font color="#323232"><font face="Arial, Helvetica, sans-serif"><b>電機綜合保護器</b>經濟性：采用先進的設計、合理的結構，專業化、規?；纳a，降低產品成本，給用戶帶來極高的經濟效益。</font></font><br /><script src="/inc/AspCms_VisitsAdd.asp?id=1954"></script> </div> <div id="C_wechat_link" style="display: none;"></div> <iframe style="display: none;width:100%;border-width: 0;overflow: hidden;" id="iFrame" width="100%"></iframe> <script> function getUrl(URL) { let http = (window.location.protocol === 'http:' ? 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