在繼電(dian)器線圈兩端(duan)并(bing)聯一個(ge)二(er)極管,正(zheng)確的(de)說法應該是(shi)稱為(wei)“反(fan)相(xiang)”二(er)極管,當然作用就是(shi)用來保護驅動(dong)三極管不會被電(dian)感的(de)反(fan)電(dian)動(dong)勢擊穿。
在(zai)選用(yong)電(dian)磁電(dian)流(liu)(liu)繼(ji)電(dian)器前,要(yao)先了解必要(yao)的條件:1、控制(zhi)電(dian)路的電(dian)源電(dian)壓,能(neng)提供的最大電(dian)流(liu)(liu);2、被控制(zhi)電(dian)路中(zhong)的電(dian)壓和電(dian)流(liu)(liu)等(deng)。
電(dian)(dian)流繼電(dian)(dian)器(qi)的(de)返(fan)回系數(shu)就是(shi)繼電(dian)(dian)器(qi)的(de)返(fan)回量(liang)數(shu)值與動作量(liang)數(shu)值的(de)比值。
過(guo)電(dian)流(liu)繼電(dian)器(qi)(qi)是用(yong)于回(hui)路中電(dian)流(liu)跨過(guo)設(she)定(ding)值(zhi)時動作,熱繼電(dian)器(qi)(qi)通常(chang)用(yong)于電(dian)機(ji)(ji)的(de)過(guo)載(zai)維護,避免電(dian)機(ji)(ji)過(guo)載(zai);熱繼電(dian)器(qi)(qi)是用(yong)于電(dian)動機(ji)(ji)或其它(ta)電(dian)氣設(she)備、電(dian)氣線路的(de)過(guo)載(zai)維護的(de)維護電(dian)器(qi)(qi)。
電流(liu)繼(ji)電器是過流(liu)動作,小(xiao)于整定值(zhi)后返回;為了避免電流(liu)在(zai)整定值(zhi)附近時導致繼(ji)電器頻(pin)繁啟動返回,一般要設一個(ge)返回值(zhi),例如0.97,電流(liu)小(xiao)于0.97才返回。
如何區分(fen)常(chang)(chang)開(kai)常(chang)(chang)閉(bi)觸(chu)點。電流繼電器其(qi)實分(fen)為常(chang)(chang)開(kai)和常(chang)(chang)閉(bi)觸(chu)點,常(chang)(chang)閉(bi)觸(chu)點就(jiu)是就(jiu)是阻(zu)值(zhi)為零時候的兩端,不過這個(ge)值(zhi)一般都會有幾歐姆(mu),可用萬用表來(lai)測量(liang),測量(liang)電阻(zu)即可。
繼電器的(de)觸點(dian)就(jiu)(jiu)是處(chu)于(yu)常(chang)(chang)開或(huo)者(zhe)常(chang)(chang)閉的(de)狀態(tai),也就(jiu)(jiu)是簡(jian)單的(de)理解(jie)為開關常(chang)(chang)開或(huo)者(zhe)常(chang)(chang)關使信號(hao)接(jie)通(tong)或(huo)者(zhe)斷開的(de)接(jie)點(dian)就(jiu)(jiu)叫繼電器的(de)觸點(dian)。
由于電(dian)(dian)(dian)流(liu)繼電(dian)(dian)(dian)器(qi)觸點(dian)的(de)跳動或(huo)者開(kai)閉的(de)一瞬間(jian)均會引起感性負載的(de)變化,產(chan)生氣體放電(dian)(dian)(dian)現象,但(dan)電(dian)(dian)(dian)流(liu)繼電(dian)(dian)(dian)器(qi)觸點(dian)通斷的(de)電(dian)(dian)(dian)流(liu)較小,觸點(dian)間(jian)不會出(chu)(chu)現電(dian)(dian)(dian)弧,但(dan)會出(chu)(chu)現“火花放電(dian)(dian)(dian)”。
熱電流繼電器的(de)復位方式(shi)有(you)手動(dong)復位和自動(dong)復位兩種方式(shi)。
現在有(you)一種新型的星三角時間繼(ji)電器,具有(you)記(ji)憶功能,有(you)兩個線(xian)圈(quan),一個是(shi)吸zhidao合(he)線(xian)圈(quan),加(jia)上電壓繼(ji)電器吸合(he),但吸合(he)線(xian)圈(quan)斷電后繼(ji)電器仍然保持(chi)吸合(he)狀態。
電(dian)流(liu)繼電(dian)器(qi)主(zhu)要是反(fan)映電(dian)流(liu)變化(hua),在電(dian)器(qi)設備的(de)電(dian)氣回(hui)路(lu)中(zhong)可(ke)以起到電(dian)流(liu)保護和(he)控制的(de)作用。電(dian)流(liu)繼電(dian)器(qi)是接在主(zhu)回(hui)路(lu)當中(zhong),當回(hui)路(lu)中(zhong)的(de)電(dian)流(liu)達到電(dian)流(liu)繼電(dian)器(qi)規定(ding)范(fan)圍外(wai)的(de)電(dian)流(liu)值(zhi)時(shi)這時(shi)就會跳開主(zhu)回(hui)路(lu)同時(shi)發生(sheng)相關信號。
正(zheng)常情況下,線圈中流(liu)入負(fu)荷電流(liu),為保證繼電器不(bu)動作,可動舌(she)片(pian)受彈(dan)(dan)簧7反作用力(li)(li)的控制(zhi)而保持在(zai)原始位置,此(ci)時彈(dan)(dan)簧產生的力(li)(li)矩(ju)(ju)稱為初拉力(li)(li)矩(ju)(ju)。由于彈(dan)(dan)簧的張力(li)(li)與其(qi)伸長(chang)成正(zheng)比(bi),則舌(she)片(pian)向(xiang)左移動,彈(dan)(dan)簧產生反抗力(li)(li)矩(ju)(ju)=初拉力(li)(li)矩(ju)(ju)+空隙變化的比(bi)例。
控(kong)制繼電(dian)器(qi)是一種自動電(dian)器(qi),它(ta)適用于遠距離接(jie)通和分(fen)斷(duan)交、直流(liu)小容(rong)量控(kong)制電(dian)路,并(bing)在電(dian)力(li)驅動系統(tong)中供(gong)控(kong)制、保護及信(xin)號轉換用。
過電(dian)流繼電(dian)器一直以(yi)來都是人(ren)們(men)生活以(yi)及工作當中的(de)輔助小幫手。其(qi)實很多(duo)人(ren)在生活當中都會運用到這類(lei)裝置(zhi),但是卻完全不(bu)清(qing)楚如何挑選這類(lei)產(chan)品。關于過電(dian)流繼電(dian)器的(de)選擇,其(qi)實是眾多(duo)使用者關注的(de)焦點問題。
在高壓配(pei)電(dian)運行或者低(di)壓維(wei)修過程中(zhong)(zhong),我(wo)們(men)電(dian)力作業人員經常都會碰到(dao)各(ge)種(zhong)各(ge)樣的繼(ji)電(dian)器:中(zhong)(zhong)間繼(ji)電(dian)器,時間繼(ji)電(dian)器,速度繼(ji)電(dian)器等等。
安(an)全繼電(dian)(dian)器(qi)被我(wo)們(men)所熟知,就是我(wo)們(men)日常(chang)生活中(zhong)為了安(an)全,為了預防觸電(dian)(dian)傷(shang)人,為了防止設備過熱等所使(shi)用的(de)一種電(dian)(dian)器(qi)原件,其實這只是安(an)全繼電(dian)(dian)器(qi)其中(zhong)小部分(fen)的(de)作用,安(an)全繼電(dian)(dian)器(qi)還有很多功能是我(wo)們(men)所不知道的(de)。
過(guo)電流(liu)繼電器(qi)與欠電流(liu)繼電器(qi)有什么(me)主要(yao)區(qu)別?定義不同、工(gong)作原理(li)不同、圖形符號不同、工(gong)作特點各(ge)異。
電(dian)流繼(ji)電(dian)器具有接線簡單、動作迅速可靠、維護(hu)(hu)方便(bian)、使用(yong)壽(shou)命長等優點,作為(wei)保護(hu)(hu)元件廣泛應用(yong)于電(dian)動機、變壓器和輸電(dian)線路(lu)(lu)的過載和短路(lu)(lu)的繼(ji)電(dian)保護(hu)(hu)線路(lu)(lu)中。
靜(jing)態(tai)電流繼(ji)電器產(chan)品簡介:用(yong)途、結構(gou)原理、技(ji)術參(can)數、常用(yong)測試等。
電磁式電流(liu)繼電器產品簡介:用途、結構原(yuan)理、原(yuan)理特性、使用維(wei)護等(deng)。
電(dian)流(liu)繼電(dian)器的(de)(de)工作原(yuan)理:在(zai)繼電(dian)器鐵芯(xin)的(de)(de)極面上嵌有(you)短路環(huan),使得(de)繼電(dian)器電(dian)流(liu)線圈所產生(sheng)的(de)(de)磁通(tong)分(fen)兩部分(fen)穿過(guo)圓盤(pan)。
開(kai)關(guan)和(he)繼電(dian)器制造(zao)商正在進一步增(zeng)強其產品(pin)可(ke)靠性的設計(ji),以使之滿足更嚴格的工業和(he)軍事應(ying)(ying)用(yong)需(xu)(xu)求。為這些應(ying)(ying)用(yong)所設計(ji)的產品(pin)經常需(xu)(xu)要(yao)滿足最苛刻的環境(jing)要(yao)求,如防(fang)水、防(fang)熱(re)、防(fang)溶劑、防(fang)塵以及其它(ta)污染物的侵蝕(shi)等。在許(xu)多情況下,它(ta)們還需(xu)(xu)要(yao)抵御高強度的沖擊和(he)振(zhen)動,并且(qie)要(yao)求具有(you)較長的機械壽命(ming)。在過(guo)去半年內,Knitter-Switch、EAO、Electroswitch、ITT Cannon和(he)NKK等幾(ji)家開(kai)關(guan)與繼電(dian)器制造(zao)商,推出了可(ke)以抵抗惡劣環境(jing)的新型(xing)產品(pin)。
功率方向(xiang)繼電(dian)(dian)器電(dian)(dian)壽命(ming)要求有哪些? 【解答(da)】1、繼電(dian)(dian)器觸點應(ying)能接通和(he)分(fen)斷(duan)電(dian)(dian)壓不大(da)于(yu)250V,電(dian)(dian)流不大(da)于(yu)1A的(de)直流有感(gan)負(fu)荷(時間(jian)常數為5ms)的(de)電(dian)(dian)路,分(fen)斷(duan)功率為10W。
? 計(ji)算機網絡作為信息(xi)和數(shu)據通信工(gong)具已(yi)成為信息(xi)時(shi)代的(de)技術支柱,使(shi)人(ren)類生(sheng)產(chan)和社會生(sheng)活的(de)面貌發生(sheng)了根本變化。它深刻(ke)影(ying)響著各個工(gong)業領(ling)域,也為各個工(gong)業領(ling)域提供了強有力的(de)通信手段。到目(mu)前(qian)為止,除了差動保(bao)護和縱聯保(bao)護外,所(suo)有繼電(dian)(dian)保(bao)護裝置都(dou)只(zhi)能反應(ying)保(bao)護安裝處(chu)的(de)電(dian)(dian)氣量(liang)。
繼電(dian)(dian)器(qi)是具有(you)隔離功能的(de)自(zi)(zi)(zi)動(dong)開關元(yuan)件,廣泛(fan)應用于遙控、遙測、通訊、自(zi)(zi)(zi)動(dong)控制、機電(dian)(dian)一(yi)體(ti)化(hua)及電(dian)(dian)力電(dian)(dian)子(zi)設備中(zhong),是最(zui)重要的(de)控制元(yuan)件之一(yi)。根(gen)據國際市場(chang)研究(jiu)機構MarketsandMarkets發布的(de)研究(jiu)報告(gao)認為(wei),受(shou)到配電(dian)(dian)自(zi)(zi)(zi)動(dong)化(hua)投資需求增(zeng)加推動(dong),到2021年(nian),全球自(zi)(zi)(zi)動(dong)繼電(dian)(dian)器(qi)市場(chang)規模將達(da)到10.33億美元(yuan),期間年(nian)復合(he)增(zeng)率達(da)到3.9%。
一(yi)、繼(ji)電(dian)保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)的(de)任務和要求 1.繼(ji)電(dian)保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)的(de)任務 為(wei)保(bao)(bao)(bao)證供配(pei)電(dian)系(xi)統(tong)的(de)安全運行,避免過(guo)(guo)(guo)負荷和短路引(yin)起(qi)的(de)過(guo)(guo)(guo)電(dian)流(liu)對系(xi)統(tong)的(de)影響(xiang),在供配(pei)電(dian)系(xi)統(tong)中(zhong)(zhong)要裝(zhuang)有不(bu)同類(lei)型的(de)過(guo)(guo)(guo)電(dian)流(liu)保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)裝(zhuang)置。常用的(de)過(guo)(guo)(guo)電(dian)流(liu)保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)裝(zhuang)置有熔斷(duan)器保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)、低壓斷(duan)路器保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)和繼(ji)電(dian)保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)。其中(zhong)(zhong)繼(ji)電(dian)保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)廣泛應用于高(gao)壓供配(pei)電(dian)系(xi)統(tong)中(zhong)(zhong),其保(bao)(bao)(bao)護(hu)(hu)(hu)(hu)功能很多,而且是實現供配(pei)電(dian)自動化的(de)基礎。
繼電(dian)器(qi)的(de)定義:繼電(dian)器(qi)是一種(zhong)當輸(shu)入量(電(dian)、磁、聲、光、熱)達到一定值(zhi)時,輸(shu)出(chu)量將發(fa)生跳(tiao)躍(yue)式變化的(de)自動控制器(qi)件(jian)。
1.事件過程 某年5月20日,某機組(zu)2EH油(you)(you)泵(beng)運行,EH油(you)(you)壓低(di),聯鎖啟動(dong)1EH油(you)(you)泵(beng)。11:28:58,汽輪機跳(tiao)閘(zha),首出為EH油(you)(you)壓低(di),鍋爐(lu)MFT,發(fa)變組(zu)跳(tiao)閘(zha),跳(tiao)閘(zha)過程曲線見圖(tu)1。
繼(ji)電器是(shi)(shi)根(gen)據(ju)某種輸(shu)入信號來(lai)接(jie)通或斷開小電流(liu)控制電路,實現遠距離控制和保護的自動(dong)控制電器。其輸(shu)入量(liang)可(ke)以是(shi)(shi)電流(liu)、電壓(ya)等(deng)電量(liang),也可(ke)以是(shi)(shi)溫度、時(shi)間(jian)、速度、壓(ya)力等(deng)非電量(liang),而輸(shu)出則(ze)是(shi)(shi)觸頭(tou)的動(dong)作或者是(shi)(shi)電路參數的變化。
繼(ji)電器(qi)相信大(da)家肯定都不陌生,是(shi)一(yi)種(zhong)控(kong)(kong)制(zhi)器(qi)件,通常作為控(kong)(kong)制(zhi)開關使用(yong)(yong)與(yu)電路(lu)中,通過電磁轉換(huan)來(lai)達到控(kong)(kong)制(zhi)電路(lu)通斷(duan)的目(mu)的,外觀多種(zhong)多樣,但原理相同(tong),繼(ji)電器(qi)可用(yong)(yong)于各種(zhong)各樣的電路(lu),實(shi)現開關,轉換(huan),延(yan)遲功能,但作為漏電保護器(qi)件用(yong)(yong)應(ying)在電路(lu)中卻(que)不多見。
1、繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額(e)(e)(e)定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)選(xuan)擇 繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額(e)(e)(e)定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)是(shi)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)最主(zhu)要的(de)(de)(de)一(yi)項技術參數。在使用繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)時,應(ying)該(gai)首(shou)先考慮所(suo)(suo)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(即繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)線圈(quan)所(suo)(suo)在的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu))的(de)(de)(de)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya),繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)(de)額(e)(e)(e)定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)應(ying)等于所(suo)(suo)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。一(yi)般所(suo)(suo)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)是(shi)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額(e)(e)(e)定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)0.86。注意所(suo)(suo)在電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)工(gong)件電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)千萬不能超過繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額(e)(e)(e)定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya),否則(ze)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)線圈(quan)容易燒毀。另外,有(you)些集成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu),例如(ru)(ru)NE555電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)是(shi)可以直接(jie)驅動繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)工(gong)作(zuo)(zuo)的(de)(de)(de),而有(you)些集成電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu),例如(ru)(ru)COMS電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流小,需要加一(yi)級晶(jing)(jing)體(ti)管(guan)放大(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)(lu)方(fang)可驅動繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi),這(zhe)就應(ying)考慮晶(jing)(jing)體(ti)管(guan)輸(shu)出(chu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流應(ying)大(da)于繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)(de)額(e)(e)(e)定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流。