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class="mbx2"><a href="/">首頁</a> > <a href="/article.html">技術文章</a> > 接地線的作用是什么?</div> <div id="nxnzvbt5" class="inpage_content"> <div id="nxnzvbt5" class="nr_main_box"> <h1 class="inside_rnewtil">接地線的作用是什么?</h1> <div id="nxnzvbt5" class="inside_rnewtime">點擊次數(shù)：2629 更新時間：2018-07-14</div> <div id="nxnzvbt5" class="inside_rnewcon"><p><span style="font-size:16px"><strong>接地線</strong>在電路系統(tǒng)中，接地線是非常有必要的。那么，接地線有什么作用呢？下面小編給大家介紹一下接地線的作用。<br /><br />庇護接地<br /><br />　　庇護接地是為防備絕緣毀壞造成裝備帶電危及人身平安而設置的庇護裝配，它有接地與接零兩種方法。按電力劃定，凡采納三相四線供電的體系，因為中性線接地，所以應采納接零方法，而把裝備的金屬外殼經(jīng)由過程導體接至零線上，而不容許將裝備外殼直接接地。這在廣電體系的配電房中的開關裝備，中間空調(diào)機、發(fā)射機等電源開關裝備和大耗電裝備中尤其常見。在計劃計劃時，應從地網(wǎng)中引出接地母線至各裝備上，再將呆板外殼用導體連至接地母線上。值得指出的是：接地線應接在裝備的接地公用端子上，另外一端*使用焊接。<br /><br />　　偶然裝備外殼會麻手，這是因為交換泄電而裝備外殼沒接零釀成的。一般可將電源插頭拔出接地線變更一下地位再插入便可辦理。這在一些常挪動的輯錄裝備中，因為接零線經(jīng)常被疏忽，操縱職員有的大概會雙手同時打仗接零和不接零的裝備，就有大概產(chǎn)生上述征象。<br /><br />過壓庇護接地<br /><br />　　這是為防雷電而設置的接地庇護裝配。防雷裝配遍及使用的是避雷針和避雷器。避雷針經(jīng)由過程鐵塔或修建物鋼筋入地，避雷器則經(jīng)由過程公用地線入地。避雷器每一年雷旱季節(jié)到臨以前須查驗，以防生效。如我臺的德律風接入器遭雷擊，便是因話線防雷器生效而至。在防雷引下線上，絕不要毗連其余裝備的地線，防雷引下線只能零丁直接入地，不然雷電會經(jīng)由過程引下線毀壞其余裝備。如某臺衛(wèi)星電視接管機曾數(shù)次遭雷擊，其原困是饋線與房頂金屬護欄磨擦而絕緣毀壞，而金屬護欄與避雷針引下體焊在一塊兒，以致雷電竄入而擊壞接管機。<br /><br />屏障地<br /><br />為防備電磁感到而對視、音頻線的屏障金屬外皮、電子裝備的金屬外殼、屏障罩、修建物的金屬屏障網(wǎng)（如測活絡度、抉擇性等目標的屏障室）進行接地的一種防護步伐。在所有接地中，屏障地復雜，有種說不清，道不明的感受。由于屏障自己既可防外界滋擾，又大概經(jīng)由過程它對外界組成滋擾，而在裝備內(nèi)各元器件之間也須防電磁滋擾。<br /><br />旌旗燈號地<br /><br />　　各類電子電路，都有一個基準電位點，這個基準電位點便是旌旗燈號地。它的感化是包管電路有一個同一的基準電位，不致于浮動而引發(fā)旌旗燈號偏差。<br /><br />旌旗燈號地的毗連是：同一裝備的旌旗燈號輸出端地與旌旗燈號輸入端地不能聯(lián)在一塊兒，而應分隔；前級（裝備）的輸入地只要與后級（裝備）的輸出地相連。不然，旌旗燈號大概經(jīng)由過程地線構成反饋，引發(fā)旌旗燈號的浮動。這在裝備的測試中，旌旗燈號地的毗連特別要引發(fā)細致<br /> </span></p></div> <div id="nxnzvbt5" class="inside_newsthree"> <p id="newsprev">上一篇：<b class="newsprev"><a href="/Article-1587958.html">汽輪機維修用大螺栓電加熱器要求上?？档请姎?/a></b></p> <p id="newsnext">下一篇：<b class="newsnext"><a 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