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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"> 觸點壓力表怎么樣接到水泵控制箱 </h1> <div class="inforArticle"> <span class="author"> <strong>作者：</strong>?？滤? <strong>來源：</strong>網絡 <strong>發布：</strong> 2017-1-21 9:28:24 </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"> <div align="left">　電接點壓力表有上限接點和下限接點（共用中點）。下限接點（水少啟動，并聯接觸器常開接點自保持）接水泵接觸器線圈；上限接點（水滿停止）接中間繼電器線圈，中間繼電器的常閉接點串入水泵接觸器的線圈回路，動作時斷開接觸器線圈電源。要是接觸器很大，則下限接點先經另一個繼電器放大。</div><div align="left">　　利用電接點壓力表自動控制水泵控制箱電路圖：</div><div align="center"><img src="http://www.003lm.com:8011/bbs/data/attachment/forum/201701/21/092704f02zwg2z044cof23.jpg" alt="" /></div><br /><div align="left">　　圖<font face="Times New Roman">1</font><font face="宋體">為水泵自動上水電接點壓力表控制接線圖，工作過程：當水壓降低時電接點壓力表中間觸點與低限觸點接通</font><font face="Times New Roman">--</font><font face="宋體">經</font><font face="Times New Roman">K1</font><font face="宋體">常閉觸點到達接觸器</font><font face="Times New Roman">K</font><font face="宋體">（主接觸器），</font><font face="Times New Roman">K</font><font face="宋體">線圈得電吸合，</font><font face="Times New Roman">K</font><font face="宋體">輔助常開觸點接通，使</font><font face="Times New Roman">K</font><font face="宋體">形成自保持電路（這時因壓力上升電接點壓力表中間觸點與低限觸點已離開），</font><font face="Times New Roman">K</font><font face="宋體">得電帶動主觸點接通電源供給水泵工作。當壓力上升到設定壓力時，電接點壓力表中間觸點與高限觸點接通，經</font><font face="Times New Roman">K</font><font face="宋體">輔助觸點到達</font><font face="Times New Roman">K1</font><font face="宋體">（繼電器）線圈，</font><font face="Times New Roman">K1</font><font face="宋體">吸合，</font><font face="Times New Roman">K1</font><font face="宋體">輔助常閉觸點斷開</font><font face="Times New Roman">K</font><font face="宋體">線圈釋放，主觸點斷開停止給水泵工作電源。</font><font face="Times New Roman">K1</font><font face="宋體">線圈串入輔助觸點</font><font face="Times New Roman">K</font><font face="宋體">的目的是為了</font><font face="Times New Roman">K1</font><font face="宋體">能夠可靠關斷，因壓力表在高壓區壓力抖動造成電接點有時也會接觸不可靠，所以串入輔助觸點</font><font face="Times New Roman">K</font><font face="宋體">，一但</font><font face="Times New Roman">K1</font><font face="宋體">進入失電</font><font face="Times New Roman">K</font><font face="宋體">也失電，</font><font face="Times New Roman">K</font><font face="宋體">失電，</font><font face="Times New Roman">K</font><font face="宋體">的輔助觸點會將</font><font face="Times New Roman">K1</font><font face="宋體">的回路可靠斷開。</font></div><div align="center"><img src="http://www.003lm.com:8011/bbs/data/attachment/forum/201701/21/092800idizg2s8ruugpi0z.jpg" alt="" /></div><br /><div align="left">　　圖<font face="Times New Roman">2</font><font face="宋體">是手動開啟的自動控制電路，有時停電以后，再來電時不希望水泵自動運轉，加了一個手動啟動停止電路，當按下啟動按鈕時</font><font face="Times New Roman">K3</font><font face="宋體">得電吸合輔助常開觸點</font><font face="Times New Roman">K3</font><font face="宋體">連通取代啟動按鈕，形成自保持電路，一但停電，再來電時不按啟動按鈕是不會自己轉起來的。</font></div><br /><br /><br /><font size="2"><font color="gray"> <img src="http://www.003lm.com/bbs/xwb/images/bgimg/icon_logo.png" border="0" alt="" style="max-width:400px" /> 該貼已經同步到 <a target="_blank">admin的微博</a></font></font><script src="/inc/AspCms_VisitsAdd.asp?id=2507"></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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