在繼電器線(xian)圈兩(liang)端并聯(lian)一個二(er)極(ji)管(guan)，正確的說法應該(gai)是稱為“反相”二(er)極(ji)管(guan)，當然作(zuo)用就是用來保護驅動三極(ji)管(guan)不會被電感的反電動勢擊穿。
在選用電(dian)磁電(dian)流(liu)繼電(dian)器前，要(yao)先了解必要(yao)的條(tiao)件：1、控制電(dian)路的電(dian)源(yuan)電(dian)壓(ya)，能提供的最大電(dian)流(liu)；2、被控制電(dian)路中的電(dian)壓(ya)和(he)電(dian)流(liu)等。
電流繼(ji)電器(qi)的返(fan)(fan)回系數(shu)就是繼(ji)電器(qi)的返(fan)(fan)回量(liang)數(shu)值與動(dong)作(zuo)量(liang)數(shu)值的比值。
過電(dian)(dian)(dian)流(liu)繼(ji)電(dian)(dian)(dian)器(qi)是用(yong)于回路中電(dian)(dian)(dian)流(liu)跨過設定值時動(dong)作，熱繼(ji)電(dian)(dian)(dian)器(qi)通常用(yong)于電(dian)(dian)(dian)機(ji)(ji)的過載維護，避免(mian)電(dian)(dian)(dian)機(ji)(ji)過載；熱繼(ji)電(dian)(dian)(dian)器(qi)是用(yong)于電(dian)(dian)(dian)動(dong)機(ji)(ji)或其它電(dian)(dian)(dian)氣設備(bei)、電(dian)(dian)(dian)氣線路的過載維護的維護電(dian)(dian)(dian)器(qi)。
電(dian)流(liu)繼電(dian)器是過流(liu)動作(zuo)，小于整(zheng)定值(zhi)后返回；為(wei)了避免電(dian)流(liu)在(zai)整(zheng)定值(zhi)附近時導致繼電(dian)器頻繁啟動返回，一般要設一個(ge)返回值(zhi)，例如0.97，電(dian)流(liu)小于0.97才(cai)返回。
如(ru)何區分常(chang)(chang)開(kai)常(chang)(chang)閉觸(chu)點。電(dian)流(liu)繼電(dian)器其實分為常(chang)(chang)開(kai)和常(chang)(chang)閉觸(chu)點，常(chang)(chang)閉觸(chu)點就(jiu)(jiu)是(shi)就(jiu)(jiu)是(shi)阻(zu)值為零時候的兩端，不過這個值一般都會有幾(ji)歐姆，可用萬用表來測(ce)量(liang)，測(ce)量(liang)電(dian)阻(zu)即可。
繼電器的觸(chu)點(dian)就(jiu)是處于常(chang)(chang)開(kai)或(huo)者(zhe)常(chang)(chang)閉的狀態(tai)，也就(jiu)是簡單的理解為開(kai)關常(chang)(chang)開(kai)或(huo)者(zhe)常(chang)(chang)關使信號接通或(huo)者(zhe)斷開(kai)的接點(dian)就(jiu)叫(jiao)繼電器的觸(chu)點(dian)。
由于電流繼電器觸(chu)點的(de)跳(tiao)動或(huo)者(zhe)開(kai)閉(bi)的(de)一瞬間均會引起(qi)感性(xing)負載的(de)變化，產生(sheng)氣(qi)體放電現象，但電流繼電器觸(chu)點通(tong)斷的(de)電流較小，觸(chu)點間不會出(chu)現電弧，但會出(chu)現“火花放電”。
熱電流(liu)繼電器的(de)復(fu)位(wei)方式有手動(dong)(dong)復(fu)位(wei)和自動(dong)(dong)復(fu)位(wei)兩種方式。
現在(zai)有一種新型的星三(san)角時間繼電(dian)器(qi)，具有記憶功能，有兩個線(xian)圈(quan)，一個是吸zhidao合(he)線(xian)圈(quan)，加上(shang)電(dian)壓繼電(dian)器(qi)吸合(he)，但吸合(he)線(xian)圈(quan)斷電(dian)后繼電(dian)器(qi)仍然保持(chi)吸合(he)狀態。
電(dian)流(liu)(liu)繼電(dian)器(qi)主(zhu)要是反映電(dian)流(liu)(liu)變化，在(zai)電(dian)器(qi)設備的(de)電(dian)氣回路中可(ke)以起到(dao)(dao)電(dian)流(liu)(liu)保護和控制的(de)作用。電(dian)流(liu)(liu)繼電(dian)器(qi)是接在(zai)主(zhu)回路當中，當回路中的(de)電(dian)流(liu)(liu)達到(dao)(dao)電(dian)流(liu)(liu)繼電(dian)器(qi)規定(ding)范圍外的(de)電(dian)流(liu)(liu)值時(shi)這時(shi)就會跳開主(zhu)回路同時(shi)發(fa)生相關(guan)信號。
正常(chang)情況(kuang)下，線圈中流入(ru)負荷電流，為保證繼(ji)電器不動作(zuo)，可(ke)動舌片受(shou)彈(dan)簧7反(fan)作(zuo)用力(li)的(de)控制而保持(chi)在原始位置，此時彈(dan)簧產生的(de)力(li)矩(ju)稱為初拉力(li)矩(ju)。由于(yu)彈(dan)簧的(de)張(zhang)力(li)與其伸長成(cheng)正比，則(ze)舌片向左(zuo)移動，彈(dan)簧產生反(fan)抗力(li)矩(ju)=初拉力(li)矩(ju)+空(kong)隙(xi)變(bian)化的(de)比例。
控(kong)(kong)(kong)制(zhi)繼電(dian)器(qi)是(shi)一種自動(dong)電(dian)器(qi)，它適用(yong)于遠距離接通和分(fen)斷(duan)交、直流(liu)小容量控(kong)(kong)(kong)制(zhi)電(dian)路(lu)，并在(zai)電(dian)力驅動(dong)系統(tong)中供控(kong)(kong)(kong)制(zhi)、保護及信號轉(zhuan)換用(yong)。
過電(dian)(dian)流繼(ji)電(dian)(dian)器(qi)一(yi)直(zhi)以來都是人們(men)生(sheng)活以及工作當(dang)中(zhong)的輔(fu)助小幫手。其實很多人在(zai)生(sheng)活當(dang)中(zhong)都會(hui)運用到這類裝置，但是卻完(wan)全(quan)不清楚如(ru)何挑選(xuan)這類產品。關于過電(dian)(dian)流繼(ji)電(dian)(dian)器(qi)的選(xuan)擇，其實是眾多使(shi)用者關注的焦點問題(ti)。
在(zai)高壓(ya)配電(dian)(dian)運行或者(zhe)低壓(ya)維修過程(cheng)中(zhong)，我們電(dian)(dian)力作業(ye)人員經常都會碰到各(ge)(ge)種各(ge)(ge)樣的繼(ji)電(dian)(dian)器(qi)：中(zhong)間繼(ji)電(dian)(dian)器(qi)，時間繼(ji)電(dian)(dian)器(qi)，速度繼(ji)電(dian)(dian)器(qi)等等。
安全(quan)繼電器(qi)被我們所熟(shu)知，就是我們日常生活中為了安全(quan)，為了預防觸(chu)電傷人，為了防止設(she)備過熱等所使用的(de)一(yi)種電器(qi)原(yuan)件(jian)，其實這(zhe)只(zhi)是安全(quan)繼電器(qi)其中小部(bu)分的(de)作(zuo)用，安全(quan)繼電器(qi)還(huan)有很多功能是我們所不知道的(de)。
過電流繼電器(qi)與欠(qian)電流繼電器(qi)有什(shen)么主(zhu)要區別？定義不(bu)同(tong)(tong)、工(gong)(gong)作原理不(bu)同(tong)(tong)、圖形符號不(bu)同(tong)(tong)、工(gong)(gong)作特(te)點各異。
電流繼電器具有接線(xian)(xian)簡單、動作(zuo)迅(xun)速可靠(kao)、維護(hu)方(fang)便(bian)、使用壽命長等優點,作(zuo)為(wei)保(bao)護(hu)元件廣泛應(ying)用于電動機、變壓(ya)器和輸電線(xian)(xian)路的(de)過載和短路的(de)繼電保(bao)護(hu)線(xian)(xian)路中。
靜(jing)態電(dian)流繼電(dian)器產品簡介：用(yong)途、結(jie)構原理(li)、技術(shu)參數、常用(yong)測試等。
電(dian)磁式電(dian)流繼電(dian)器產品(pin)簡介：用途、結構原(yuan)理(li)、原(yuan)理(li)特性(xing)、使(shi)用維護等(deng)。
電(dian)流(liu)繼電(dian)器的工作原理：在(zai)繼電(dian)器鐵芯(xin)的極面上嵌有短路環，使(shi)得繼電(dian)器電(dian)流(liu)線圈(quan)所產(chan)生(sheng)的磁通分兩部分穿過圓盤。
開(kai)關(guan)和繼電器制造(zao)商正(zheng)在進一步增強其產品(pin)可(ke)靠性的設計，以(yi)(yi)使之滿足更(geng)嚴格的工業和軍事(shi)應用(yong)需求。為這些應用(yong)所(suo)設計的產品(pin)經常需要滿足最苛刻的環境要求，如防水、防熱(re)、防溶(rong)劑、防塵以(yi)(yi)及其它污染物(wu)的侵蝕等。在許多(duo)情(qing)況下，它們(men)還需要抵(di)御高強度的沖(chong)擊(ji)和振動(dong)，并且要求具有較(jiao)長的機(ji)械壽(shou)命。在過去半年內(nei)，Knitter-Switch、EAO、Electroswitch、ITT Cannon和NKK等幾家開(kai)關(guan)與繼電器制造(zao)商，推出了可(ke)以(yi)(yi)抵(di)抗惡劣環境的新型產品(pin)。
功率(lv)方向(xiang)繼(ji)電器電壽命要求(qiu)有哪(na)些？ 【解答】1、繼(ji)電器觸點應能(neng)接通和分斷電壓不大(da)于(yu)250V，電流不大(da)于(yu)1A的直(zhi)流有感負荷（時間常數(shu)為5ms）的電路，分斷功率(lv)為10W。
? 計算機網絡作為(wei)信(xin)(xin)息和數據通信(xin)(xin)工(gong)具已成為(wei)信(xin)(xin)息時代的技術支柱，使人(ren)類生產和社會生活的面貌(mao)發生了(le)根本變化。它深刻(ke)影(ying)響著各個(ge)工(gong)業領(ling)域，也為(wei)各個(ge)工(gong)業領(ling)域提(ti)供(gong)了(le)強有力的通信(xin)(xin)手(shou)段(duan)。到目前為(wei)止，除(chu)了(le)差動保(bao)護(hu)和縱聯(lian)保(bao)護(hu)外，所有繼(ji)電(dian)保(bao)護(hu)裝置都只能反應保(bao)護(hu)安裝處的電(dian)氣量。
繼電器是(shi)具有隔離功能的自(zi)動(dong)(dong)(dong)開(kai)關元件(jian)(jian)，廣泛應用于遙(yao)控(kong)、遙(yao)測、通訊、自(zi)動(dong)(dong)(dong)控(kong)制、機電一(yi)(yi)體化及電力電子設備中，是(shi)最重要的控(kong)制元件(jian)(jian)之一(yi)(yi)。根據國際市(shi)場(chang)研究機構MarketsandMarkets發布(bu)的研究報告認為，受(shou)到(dao)配電自(zi)動(dong)(dong)(dong)化投(tou)資需求增加推動(dong)(dong)(dong)，到(dao)2021年(nian)，全(quan)球(qiu)自(zi)動(dong)(dong)(dong)繼電器市(shi)場(chang)規模將達到(dao)10.33億美元，期間年(nian)復(fu)合增率達到(dao)3.9%。
一、繼電(dian)(dian)保(bao)護的(de)(de)任務(wu)和要(yao)求 1.繼電(dian)(dian)保(bao)護的(de)(de)任務(wu) 為保(bao)證(zheng)供(gong)配(pei)(pei)電(dian)(dian)系統(tong)的(de)(de)安全(quan)運行(xing)，避免過(guo)負荷(he)和短路(lu)(lu)引起的(de)(de)過(guo)電(dian)(dian)流對系統(tong)的(de)(de)影響，在供(gong)配(pei)(pei)電(dian)(dian)系統(tong)中要(yao)裝有(you)不同類型的(de)(de)過(guo)電(dian)(dian)流保(bao)護裝置。常用的(de)(de)過(guo)電(dian)(dian)流保(bao)護裝置有(you)熔(rong)斷器保(bao)護、低壓(ya)斷路(lu)(lu)器保(bao)護和繼電(dian)(dian)保(bao)護。其(qi)中繼電(dian)(dian)保(bao)護廣(guang)泛應用于高壓(ya)供(gong)配(pei)(pei)電(dian)(dian)系統(tong)中，其(qi)保(bao)護功能很多，而且是(shi)實現供(gong)配(pei)(pei)電(dian)(dian)自動化的(de)(de)基礎。
繼電器的定義：繼電器是一種當(dang)輸(shu)入量(電、磁、聲(sheng)、光(guang)、熱)達到(dao)一定值(zhi)時，輸(shu)出(chu)量將發生跳躍式變化(hua)的自動控制(zhi)器件。
1.事件(jian)過程(cheng) 某年(nian)5月20日，某機組(zu)(zu)2EH油(you)泵(beng)運行(xing)，EH油(you)壓(ya)低，聯鎖啟動1EH油(you)泵(beng)。11:28:58，汽輪機跳(tiao)閘(zha)，首(shou)出為EH油(you)壓(ya)低，鍋爐MFT，發變(bian)組(zu)(zu)跳(tiao)閘(zha)，跳(tiao)閘(zha)過程(cheng)曲(qu)線(xian)見圖1。
繼電(dian)器是(shi)根(gen)據某種(zhong)輸(shu)入(ru)(ru)信(xin)號(hao)來接通或斷開小電(dian)流控(kong)制(zhi)電(dian)路(lu)，實現遠距離控(kong)制(zhi)和保(bao)護的自(zi)動控(kong)制(zhi)電(dian)器。其輸(shu)入(ru)(ru)量可以是(shi)電(dian)流、電(dian)壓等電(dian)量，也可以是(shi)溫(wen)度(du)、時間、速(su)度(du)、壓力等非(fei)電(dian)量，而輸(shu)出則(ze)是(shi)觸(chu)頭的動作或者是(shi)電(dian)路(lu)參(can)數的變(bian)化。
繼電(dian)(dian)器相信(xin)大家肯定都不陌生，是(shi)一種控制器件(jian)，通常作(zuo)為控制開關使用與電(dian)(dian)路中，通過電(dian)(dian)磁轉(zhuan)換來達(da)到(dao)控制電(dian)(dian)路通斷(duan)的(de)目的(de)，外觀多(duo)種多(duo)樣(yang)，但原理相同，繼電(dian)(dian)器可用于各種各樣(yang)的(de)電(dian)(dian)路，實現開關，轉(zhuan)換，延遲功能(neng)，但作(zuo)為漏電(dian)(dian)保護器件(jian)用應在電(dian)(dian)路中卻不多(duo)見。
1、繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)額定(ding)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)選(xuan)擇(ze) 繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)額定(ding)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)是繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)最主要的(de)一項技術參數。在(zai)使用繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)時，應該(gai)首(shou)先考(kao)慮所(suo)(suo)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(即繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)線(xian)圈所(suo)(suo)在(zai)的(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu))的(de)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)額定(ding)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)應等于所(suo)(suo)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。一般(ban)所(suo)(suo)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)是繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)額定(ding)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)的(de)0.86。注(zhu)意所(suo)(suo)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)工(gong)件電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)千(qian)萬不能超過繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)額定(ding)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)，否則繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)線(xian)圈容易燒毀。另外，有(you)些集成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，例(li)如NE555電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)是可以直接驅動(dong)繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)工(gong)作的(de)，而有(you)些集成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)，例(li)如COMS電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流小，需要加(jia)一級(ji)晶體(ti)管(guan)放大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)方可驅動(dong)繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)，這就應考(kao)慮晶體(ti)管(guan)輸出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流應大于繼(ji)(ji)(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)額定(ding)工(gong)作電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流。
