在(zai)繼電器線圈兩端并聯一個二(er)極(ji)(ji)管(guan),正確的說法(fa)應該是稱為“反相”二(er)極(ji)(ji)管(guan),當然(ran)作(zuo)用就是用來(lai)保護(hu)驅動(dong)三極(ji)(ji)管(guan)不會被(bei)電感的反電動(dong)勢(shi)擊穿。
在選(xuan)用電磁電流繼電器前,要先了解必(bi)要的條件:1、控制電路(lu)的電源(yuan)電壓,能提供的最大電流;2、被(bei)控制電路(lu)中的電壓和電流等。
電(dian)(dian)流繼(ji)電(dian)(dian)器的(de)返回系數就是繼(ji)電(dian)(dian)器的(de)返回量數值(zhi)與(yu)動作量數值(zhi)的(de)比值(zhi)。
過(guo)電(dian)(dian)(dian)流繼電(dian)(dian)(dian)器是(shi)用(yong)(yong)于回路(lu)中(zhong)電(dian)(dian)(dian)流跨過(guo)設定值時動作,熱(re)繼電(dian)(dian)(dian)器通(tong)常用(yong)(yong)于電(dian)(dian)(dian)機的過(guo)載維護(hu),避免電(dian)(dian)(dian)機過(guo)載;熱(re)繼電(dian)(dian)(dian)器是(shi)用(yong)(yong)于電(dian)(dian)(dian)動機或其它電(dian)(dian)(dian)氣(qi)設備、電(dian)(dian)(dian)氣(qi)線路(lu)的過(guo)載維護(hu)的維護(hu)電(dian)(dian)(dian)器。
電流繼(ji)電器是過流動作,小(xiao)于整定值(zhi)后(hou)返回(hui);為了避免電流在整定值(zhi)附近(jin)時導致(zhi)繼(ji)電器頻(pin)繁啟動返回(hui),一(yi)般要設一(yi)個返回(hui)值(zhi),例(li)如0.97,電流小(xiao)于0.97才(cai)返回(hui)。
如何區分常開常閉觸點。電流(liu)繼電器其實分為常開和常閉觸點,常閉觸點就是就是阻(zu)值(zhi)為零時(shi)候的(de)兩端,不(bu)過這個值(zhi)一般都會有幾歐姆,可(ke)用(yong)萬用(yong)表來測量,測量電阻(zu)即可(ke)。
繼電(dian)器的(de)觸點就是(shi)處于常開或(huo)者常閉的(de)狀態(tai),也就是(shi)簡單的(de)理解為開關常開或(huo)者常關使信號接通或(huo)者斷開的(de)接點就叫繼電(dian)器的(de)觸點。
由(you)于電(dian)(dian)(dian)流繼電(dian)(dian)(dian)器觸點(dian)的(de)跳動或者開閉的(de)一瞬(shun)間均會(hui)引起感性負載的(de)變化(hua),產(chan)生氣體(ti)放(fang)電(dian)(dian)(dian)現(xian)象,但(dan)電(dian)(dian)(dian)流繼電(dian)(dian)(dian)器觸點(dian)通斷的(de)電(dian)(dian)(dian)流較小,觸點(dian)間不會(hui)出現(xian)電(dian)(dian)(dian)弧,但(dan)會(hui)出現(xian)“火花(hua)放(fang)電(dian)(dian)(dian)”。
熱電(dian)流(liu)繼(ji)電(dian)器(qi)的復位方式有手動(dong)復位和自動(dong)復位兩種(zhong)方式。
現(xian)在有一種(zhong)新(xin)型的星三角時間繼電(dian)(dian)器(qi),具有記憶功能(neng),有兩個線(xian)圈,一個是吸zhidao合(he)線(xian)圈,加上電(dian)(dian)壓繼電(dian)(dian)器(qi)吸合(he),但吸合(he)線(xian)圈斷電(dian)(dian)后(hou)繼電(dian)(dian)器(qi)仍然(ran)保持吸合(he)狀態。
電(dian)(dian)流繼電(dian)(dian)器(qi)(qi)主(zhu)要是反映(ying)電(dian)(dian)流變化,在電(dian)(dian)器(qi)(qi)設備的(de)(de)(de)電(dian)(dian)氣回(hui)(hui)路(lu)中(zhong)可以(yi)起到電(dian)(dian)流保護和控(kong)制的(de)(de)(de)作用。電(dian)(dian)流繼電(dian)(dian)器(qi)(qi)是接(jie)在主(zhu)回(hui)(hui)路(lu)當中(zhong),當回(hui)(hui)路(lu)中(zhong)的(de)(de)(de)電(dian)(dian)流達(da)到電(dian)(dian)流繼電(dian)(dian)器(qi)(qi)規定范圍外的(de)(de)(de)電(dian)(dian)流值時(shi)這時(shi)就會跳開(kai)主(zhu)回(hui)(hui)路(lu)同時(shi)發(fa)生相關(guan)信(xin)號。
正常情況(kuang)下,線圈中流入(ru)負荷電流,為保(bao)證繼電器不動作(zuo),可動舌片(pian)受(shou)彈簧7反作(zuo)用力的(de)控制而保(bao)持在原始位置(zhi),此時彈簧產(chan)生的(de)力矩(ju)稱(cheng)為初拉力矩(ju)。由于彈簧的(de)張力與其(qi)伸長成正比,則舌片(pian)向左移動,彈簧產(chan)生反抗力矩(ju)=初拉力矩(ju)+空(kong)隙變化的(de)比例(li)。
控(kong)制(zhi)繼(ji)電(dian)器是一(yi)種自動電(dian)器,它適用于遠距離接通和分斷交、直(zhi)流(liu)小容量控(kong)制(zhi)電(dian)路,并在電(dian)力驅動系(xi)統中供控(kong)制(zhi)、保護及信(xin)號(hao)轉換用。
過電(dian)流繼電(dian)器一(yi)直以(yi)來都是(shi)人(ren)們(men)生(sheng)活以(yi)及工作當(dang)中的(de)輔助小幫手。其實(shi)很多(duo)(duo)人(ren)在(zai)生(sheng)活當(dang)中都會(hui)運用到這類(lei)裝(zhuang)置,但是(shi)卻(que)完全不清(qing)楚如(ru)何(he)挑選(xuan)這類(lei)產品。關(guan)(guan)于過電(dian)流繼電(dian)器的(de)選(xuan)擇,其實(shi)是(shi)眾多(duo)(duo)使用者關(guan)(guan)注的(de)焦點(dian)問題。
在高壓配電(dian)運行或者低壓維修過程中(zhong),我們電(dian)力(li)作業(ye)人員經常都(dou)會碰(peng)到(dao)各(ge)種各(ge)樣的繼(ji)(ji)電(dian)器(qi):中(zhong)間繼(ji)(ji)電(dian)器(qi),時間繼(ji)(ji)電(dian)器(qi),速度(du)繼(ji)(ji)電(dian)器(qi)等等。
安全繼(ji)電器(qi)被我們(men)(men)所(suo)(suo)(suo)熟知,就(jiu)是(shi)我們(men)(men)日常生活中(zhong)為(wei)了安全,為(wei)了預防觸電傷人,為(wei)了防止設備(bei)過(guo)熱(re)等所(suo)(suo)(suo)使(shi)用(yong)的一種電器(qi)原件,其實這只是(shi)安全繼(ji)電器(qi)其中(zhong)小部分的作用(yong),安全繼(ji)電器(qi)還有很多功能是(shi)我們(men)(men)所(suo)(suo)(suo)不知道(dao)的。
過電(dian)(dian)(dian)流繼電(dian)(dian)(dian)器與(yu)欠電(dian)(dian)(dian)流繼電(dian)(dian)(dian)器有什(shen)么(me)主要區別?定(ding)義不(bu)同、工作原理不(bu)同、圖形符號不(bu)同、工作特(te)點各(ge)異。
電流繼電器具有接線(xian)簡單、動作迅速可靠(kao)、維(wei)護(hu)方便(bian)、使用壽(shou)命(ming)長等優點,作為保護(hu)元件廣(guang)泛應(ying)用于電動機、變壓(ya)器和輸電線(xian)路的過載和短(duan)路的繼電保護(hu)線(xian)路中。
靜態電流繼電器產品簡介:用途、結構原理、技術參數、常用測試等。
電(dian)(dian)磁式電(dian)(dian)流(liu)繼(ji)電(dian)(dian)器產品簡介(jie):用途、結構原理(li)、原理(li)特性、使用維護(hu)等。
電(dian)流(liu)繼(ji)(ji)電(dian)器(qi)(qi)(qi)的(de)工(gong)作原理:在繼(ji)(ji)電(dian)器(qi)(qi)(qi)鐵芯的(de)極(ji)面上嵌有短路環(huan),使得繼(ji)(ji)電(dian)器(qi)(qi)(qi)電(dian)流(liu)線圈所產生的(de)磁通分(fen)兩部分(fen)穿(chuan)過圓(yuan)盤。
開(kai)(kai)關和(he)(he)(he)繼(ji)電器制(zhi)造商正(zheng)在(zai)進一步(bu)增強其產(chan)品可靠性的(de)(de)(de)設計(ji)(ji),以使之滿足更嚴格的(de)(de)(de)工(gong)業和(he)(he)(he)軍(jun)事應用需求。為這些應用所設計(ji)(ji)的(de)(de)(de)產(chan)品經常需要(yao)滿足最(zui)苛(ke)刻的(de)(de)(de)環境(jing)要(yao)求,如防(fang)(fang)水、防(fang)(fang)熱、防(fang)(fang)溶(rong)劑、防(fang)(fang)塵以及其它(ta)污染物的(de)(de)(de)侵蝕等(deng)。在(zai)許(xu)多情況下,它(ta)們還(huan)需要(yao)抵御高強度(du)的(de)(de)(de)沖擊和(he)(he)(he)振動,并且要(yao)求具有較長的(de)(de)(de)機械壽(shou)命。在(zai)過去(qu)半(ban)年內,Knitter-Switch、EAO、Electroswitch、ITT Cannon和(he)(he)(he)NKK等(deng)幾(ji)家(jia)開(kai)(kai)關與繼(ji)電器制(zhi)造商,推出了可以抵抗惡劣(lie)環境(jing)的(de)(de)(de)新型產(chan)品。
功(gong)率(lv)(lv)方向繼電(dian)器電(dian)壽命(ming)要求有(you)哪些? 【解答】1、繼電(dian)器觸點應能接通和分斷電(dian)壓不(bu)大于250V,電(dian)流不(bu)大于1A的直流有(you)感(gan)負荷(時間常數(shu)為5ms)的電(dian)路,分斷功(gong)率(lv)(lv)為10W。
? 計(ji)算(suan)機(ji)網絡作為(wei)信息和數(shu)據通信工具(ju)已成為(wei)信息時代的技術支柱,使人類生(sheng)(sheng)產(chan)和社(she)會生(sheng)(sheng)活的面貌發生(sheng)(sheng)了(le)根本(ben)變化。它(ta)深刻影響著各個(ge)工業領域,也(ye)為(wei)各個(ge)工業領域提供了(le)強有(you)(you)力的通信手段。到目前(qian)為(wei)止(zhi),除了(le)差動保(bao)護(hu)和縱(zong)聯保(bao)護(hu)外(wai),所有(you)(you)繼電(dian)保(bao)護(hu)裝置都只能反應(ying)保(bao)護(hu)安裝處的電(dian)氣量(liang)。
繼電器(qi)是(shi)具有隔離(li)功能(neng)的自(zi)動開關元(yuan)件,廣泛應用于(yu)遙控(kong)、遙測、通訊(xun)、自(zi)動控(kong)制、機電一(yi)體化(hua)及電力電子設備(bei)中,是(shi)最重要的控(kong)制元(yuan)件之一(yi)。根據(ju)國際市(shi)場研究機構MarketsandMarkets發(fa)布(bu)的研究報告(gao)認為,受到配(pei)電自(zi)動化(hua)投資需(xu)求(qiu)增(zeng)加推動,到2021年(nian),全球(qiu)自(zi)動繼電器(qi)市(shi)場規(gui)模將達(da)到10.33億美元(yuan),期間年(nian)復(fu)合增(zeng)率達(da)到3.9%。
一、繼(ji)電(dian)(dian)(dian)保(bao)(bao)護的(de)(de)(de)任(ren)務和要(yao)求(qiu) 1.繼(ji)電(dian)(dian)(dian)保(bao)(bao)護的(de)(de)(de)任(ren)務 為保(bao)(bao)證供配電(dian)(dian)(dian)系(xi)統(tong)(tong)的(de)(de)(de)安全運行(xing),避(bi)免(mian)過(guo)(guo)負荷和短路引起的(de)(de)(de)過(guo)(guo)電(dian)(dian)(dian)流(liu)對系(xi)統(tong)(tong)的(de)(de)(de)影響,在(zai)供配電(dian)(dian)(dian)系(xi)統(tong)(tong)中(zhong)要(yao)裝(zhuang)(zhuang)有不同類型(xing)的(de)(de)(de)過(guo)(guo)電(dian)(dian)(dian)流(liu)保(bao)(bao)護裝(zhuang)(zhuang)置。常用的(de)(de)(de)過(guo)(guo)電(dian)(dian)(dian)流(liu)保(bao)(bao)護裝(zhuang)(zhuang)置有熔斷器保(bao)(bao)護、低壓斷路器保(bao)(bao)護和繼(ji)電(dian)(dian)(dian)保(bao)(bao)護。其(qi)中(zhong)繼(ji)電(dian)(dian)(dian)保(bao)(bao)護廣泛應用于高(gao)壓供配電(dian)(dian)(dian)系(xi)統(tong)(tong)中(zhong),其(qi)保(bao)(bao)護功能很(hen)多(duo),而(er)且是實現供配電(dian)(dian)(dian)自動化的(de)(de)(de)基礎。
繼(ji)電器的(de)定(ding)義:繼(ji)電器是(shi)一種當輸(shu)入量(電、磁、聲(sheng)、光、熱)達到一定(ding)值(zhi)時(shi),輸(shu)出量將(jiang)發生(sheng)跳躍式變(bian)化的(de)自動控(kong)制器件。
1.事件過程 某年5月20日(ri),某機(ji)組(zu)2EH油泵運行(xing),EH油壓低,聯(lian)鎖(suo)啟動1EH油泵。11:28:58,汽輪機(ji)跳(tiao)閘(zha)(zha),首(shou)出為EH油壓低,鍋爐MFT,發變組(zu)跳(tiao)閘(zha)(zha),跳(tiao)閘(zha)(zha)過程曲線見圖1。
繼(ji)電(dian)器是(shi)根(gen)據某種輸(shu)入信號來接通(tong)或斷(duan)開小(xiao)電(dian)流控(kong)(kong)制電(dian)路(lu),實現(xian)遠距(ju)離控(kong)(kong)制和保(bao)護的(de)自動控(kong)(kong)制電(dian)器。其輸(shu)入量(liang)可以(yi)是(shi)電(dian)流、電(dian)壓等電(dian)量(liang),也可以(yi)是(shi)溫度、時間、速度、壓力等非電(dian)量(liang),而(er)輸(shu)出則是(shi)觸頭(tou)的(de)動作或者是(shi)電(dian)路(lu)參數的(de)變化。
繼電(dian)(dian)器相(xiang)信大家肯定都不陌生,是一種控制(zhi)(zhi)器件(jian),通(tong)常作(zuo)為(wei)控制(zhi)(zhi)開關使用(yong)與(yu)電(dian)(dian)路(lu)中,通(tong)過電(dian)(dian)磁(ci)轉換來達到控制(zhi)(zhi)電(dian)(dian)路(lu)通(tong)斷的目(mu)的,外(wai)觀多(duo)(duo)種多(duo)(duo)樣,但原理(li)相(xiang)同,繼電(dian)(dian)器可用(yong)于各種各樣的電(dian)(dian)路(lu),實現開關,轉換,延遲(chi)功能,但作(zuo)為(wei)漏電(dian)(dian)保護器件(jian)用(yong)應在(zai)電(dian)(dian)路(lu)中卻(que)不多(duo)(duo)見。
1、繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)選(xuan)擇 繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)是(shi)(shi)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)最主要的(de)(de)(de)一(yi)項技術參數。在(zai)(zai)(zai)(zai)使用繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)時,應該(gai)首(shou)先考慮(lv)所(suo)(suo)在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)路(lu)(即繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)線圈所(suo)(suo)在(zai)(zai)(zai)(zai)的(de)(de)(de)電(dian)(dian)(dian)(dian)路(lu))的(de)(de)(de)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya),繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)(de)額定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)應等于(yu)所(suo)(suo)在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)。一(yi)般所(suo)(suo)在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)是(shi)(shi)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)的(de)(de)(de)0.86。注意(yi)所(suo)(suo)在(zai)(zai)(zai)(zai)電(dian)(dian)(dian)(dian)路(lu)的(de)(de)(de)工(gong)件電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)千萬不能超過繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)額定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)壓(ya)(ya)(ya),否(fou)則繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)線圈容易(yi)燒毀。另外,有些(xie)集成電(dian)(dian)(dian)(dian)路(lu),例如NE555電(dian)(dian)(dian)(dian)路(lu)是(shi)(shi)可(ke)以直接驅動(dong)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)工(gong)作(zuo)(zuo)的(de)(de)(de),而有些(xie)集成電(dian)(dian)(dian)(dian)路(lu),例如COMS電(dian)(dian)(dian)(dian)路(lu)輸出電(dian)(dian)(dian)(dian)流(liu)小(xiao),需要加一(yi)級(ji)晶體管放大電(dian)(dian)(dian)(dian)路(lu)方可(ke)驅動(dong)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi),這就應考慮(lv)晶體管輸出電(dian)(dian)(dian)(dian)流(liu)應大于(yu)繼(ji)(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)(qi)的(de)(de)(de)額定(ding)工(gong)作(zuo)(zuo)電(dian)(dian)(dian)(dian)流(liu)。