聯系電話：13917768445
聯系電話：13917768445
上海碩吉電動機保護器保護常識：
1．為什么現在的電(dian)動機(ji)比(bi)過去(qu)更容易燒毀？
由于(yu)絕(jue)緣技術的(de)不(bu)斷發展(zhan)，在(zai)電(dian)(dian)動(dong)機(ji)的(de)設計上既要求(qiu)增加出力(li)，又(you)要求(qiu)減小體積，使新型電(dian)(dian)動(dong)機(ji)的(de)熱容量越來(lai)越小，過負(fu)荷(he)能(neng)力(li)越來(lai)越弱；再由于(yu)生產自(zi)動(dong)化程(cheng)度(du)的(de)提(ti)高(gao)，要求(qiu)電(dian)(dian)動(dong)機(ji)經常(chang)運行(xing)在(zai)頻繁(fan)的(de)起動(dong)、制(zhi)動(dong)、正反(fan)轉以及(ji)變(bian)負(fu)荷(he)等多種方式，對電(dian)(dian)機(ji)保護裝置提(ti)出了(le)更(geng)高(gao)的(de)要求(qiu)。另外(wai)，電(dian)(dian)機(ji)的(de)應用面更(geng)廣常(chang)工作于(yu)環境極為惡劣的(de)場(chang)合，如潮濕、高(gao)溫、多塵、腐蝕(shi)等場(chang)合。再加上電(dian)(dian)機(ji)修造(zao)上的(de)不(bu)規范，設備管理(li)上的(de)疏漏。所有這(zhe)些，造(zao)成了(le)現在(zai)的(de)電(dian)(dian)機(ji)比(bi)過去更(geng)容易損壞。
2．為什(shen)么(me)傳(chuan)統的保(bao)(bao)護(hu)裝置保(bao)(bao)護(hu)效果不甚(shen)理(li)想？
傳統的(de)(de)(de)電(dian)(dian)(dian)(dian)機(ji)(ji)保(bao)護(hu)裝置(zhi)以(yi)熔(rong)斷(duan)(duan)器(qi)(qi)、熱繼(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)為主。 熔(rong)斷(duan)(duan)器(qi)(qi)是(shi)使用早、簡(jian)單的(de)(de)(de)保(bao)護(hu)裝置(zhi)。其實，熔(rong)斷(duan)(duan)器(qi)(qi)主要是(shi)用于(yu)短路故(gu)障(zhang)時(shi)，保(bao)護(hu)供電(dian)(dian)(dian)(dian)線路，減(jian)小故(gu)障(zhang)范圍的(de)(de)(de)擴大。認為熔(rong)斷(duan)(duan)器(qi)(qi)可以(yi)保(bao)護(hu)電(dian)(dian)(dian)(dian)機(ji)(ji)短路或過載(zai)，不按電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)(de)起(qi)動電(dian)(dian)(dian)(dian)流選(xuan)擇熔(rong)絲，而是(shi)按額定(ding)電(dian)(dian)(dian)(dian)流來選(xuan)擇，是(shi)不科學的(de)(de)(de)。{TodayHot}豈不知，這(zhe)樣更容易造成電(dian)(dian)(dian)(dian)動機(ji)(ji)因(yin)斷(duan)(duan)相運行而損壞電(dian)(dian)(dian)(dian)機(ji)(ji)。 熱繼(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)是(shi)應用廣(guang)的(de)(de)(de)電(dian)(dian)(dian)(dian)機(ji)(ji)過載(zai)保(bao)護(hu)裝置(zhi)。但熱繼(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)功能單一(yi)，靈敏(min)度低、誤差大、穩定(ding)性差，已為廣(guang)大電(dian)(dian)(dian)(dian)氣(qi)工(gong)作(zuo)者所(suo)認識，所(suo)有這(zhe)些缺陷造成電(dian)(dian)(dian)(dian)機(ji)(ji)保(bao)護(hu)不可靠。事實也正是(shi)這(zhe)樣；盡(jin)管許多(duo)設備安(an)裝了熱繼(ji)電(dian)(dian)(dian)(dian)器(qi)(qi)，但電(dian)(dian)(dian)(dian)機(ji)(ji)損壞而影(ying)響正常生產的(de)(de)(de)現(xian)象仍普遍存在(zai)。
3．保護器(qi)選擇(ze)的原則？
選用電(dian)(dian)機(ji)(ji)保護(hu)(hu)裝(zhuang)置(zhi)(zhi)的(de)(de)(de)目的(de)(de)(de)，既能(neng)使(shi)電(dian)(dian)動機(ji)(ji)充分發揮(hui)過載能(neng)力(li)，又能(neng)免于損壞(huai)，而且還能(neng)提高(gao)電(dian)(dian)力(li)拖動系統(tong)的(de)(de)(de)可(ke)靠性(xing)和生產的(de)(de)(de)連(lian)續(xu)性(xing)。同時(shi)選擇保護(hu)(hu)裝(zhuang)置(zhi)(zhi)時(shi)，必須考慮幾個互相(xiang)矛盾(dun)的(de)(de)(de)因素，即可(ke)靠性(xing)、經濟性(xing)、結構簡單(dan)、操作、維護(hu)(hu)方(fang)便等。 在(zai)能(neng)滿足保護(hu)(hu)要(yao)(yao)求的(de)(de)(de)情況下首先考慮簡單(dan)保護(hu)(hu)裝(zhuang)置(zhi)(zhi)，只有當(dang)簡單(dan)的(de)(de)(de)保護(hu)(hu)裝(zhuang)置(zhi)(zhi)不能(neng)滿足要(yao)(yao)求時(shi)，或(huo)對保護(hu)(hu)特(te)性(xing)提出更高(gao)要(yao)(yao)求時(shi)，才(cai)考慮應用復雜的(de)(de)(de)保護(hu)(hu)裝(zhuang)置(zhi)(zhi)。
4、理想的電(dian)機保護器？
理想的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)保(bao)(bao)(bao)(bao)護(hu)器不是功(gong)(gong)能(neng)多，也(ye)(ye)不是所謂先(xian)進(jin)(jin)的(de)(de)(de)(de)(de)，而是應(ying)(ying)該實(shi)用(yong)(yong)(yong)的(de)(de)(de)(de)(de)。那(nei)么何為實(shi)用(yong)(yong)(yong)呢？實(shi)用(yong)(yong)(yong)應(ying)(ying)滿足(zu)可(ke)(ke)靠(kao)(kao)(kao)、經濟(ji)(ji)(ji)、方(fang)(fang)(fang)便等(deng)要素，具(ju)有(you)較高(gao)的(de)(de)(de)(de)(de)性(xing)能(neng)價格(ge)比。那(nei)么何為可(ke)(ke)靠(kao)(kao)(kao)呢？可(ke)(ke)靠(kao)(kao)(kao)首(shou)先(xian)應(ying)(ying)滿足(zu)功(gong)(gong)能(neng)的(de)(de)(de)(de)(de)可(ke)(ke)靠(kao)(kao)(kao)，{HotTag}如(ru)過(guo)電(dian)(dian)(dian)(dian)(dian)流、斷(duan)相功(gong)(gong)能(neng)必(bi)須(xu)對(dui)(dui)各種(zhong)場合、各種(zhong)過(guo)程、各種(zhong)方(fang)(fang)(fang)式發生(sheng)的(de)(de)(de)(de)(de)過(guo)電(dian)(dian)(dian)(dian)(dian)流、斷(duan)相均能(neng)可(ke)(ke)靠(kao)(kao)(kao)的(de)(de)(de)(de)(de)動(dong)作(zuo)。其次自(zi)身(shen)的(de)(de)(de)(de)(de)可(ke)(ke)靠(kao)(kao)(kao)（既然(ran)保(bao)(bao)(bao)(bao)護(hu)器是保(bao)(bao)(bao)(bao)護(hu)別人的(de)(de)(de)(de)(de)，尤其應(ying)(ying)具(ju)有(you)很(hen)高(gao)的(de)(de)(de)(de)(de)可(ke)(ke)靠(kao)(kao)(kao)性(xing)）必(bi)須(xu)具(ju)有(you)對(dui)(dui)各種(zhong)惡劣環境的(de)(de)(de)(de)(de)適應(ying)(ying)性(xing)穩(wen)定(ding)(ding)性(xing)、耐久(jiu)性(xing)。經濟(ji)(ji)(ji)性(xing)：采用(yong)(yong)(yong)先(xian)進(jin)(jin)的(de)(de)(de)(de)(de)設計、合理的(de)(de)(de)(de)(de)結構(gou)，專業化、規模化的(de)(de)(de)(de)(de)生(sheng)產(chan)，降低產(chan)品成(cheng)(cheng)(cheng)本(ben)(ben)，給(gei)用(yong)(yong)(yong)戶帶來(lai)極高(gao)的(de)(de)(de)(de)(de)經濟(ji)(ji)(ji)效益(yi)。方(fang)(fang)(fang)便性(xing)：必(bi)須(xu)在(zai)安裝、使(shi)用(yong)(yong)(yong)、調整(zheng)、接線等(deng)方(fang)(fang)(fang)面，至少應(ying)(ying)類同于熱繼電(dian)(dian)(dian)(dian)(dian)器，盡可(ke)(ke)能(neng)的(de)(de)(de)(de)(de)更(geng)簡(jian)易方(fang)(fang)(fang)便。 也(ye)(ye)正因為此，有(you)關(guan)專家早(zao)已預言為了(le)簡(jian)化電(dian)(dian)(dian)(dian)(dian)子式電(dian)(dian)(dian)(dian)(dian)機(ji)保(bao)(bao)(bao)(bao)護(hu)裝置(zhi)，應(ying)(ying)設計并采用(yong)(yong)(yong)不帶供電(dian)(dian)(dian)(dian)(dian)變壓(ya)器（無源(yuan)(yuan)化）的(de)(de)(de)(de)(de)設計方(fang)(fang)(fang)案，并使(shi)用(yong)(yong)(yong)半導體〔如(ru)可(ke)(ke)控硅）代(dai)替有(you)觸(chu)點的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)磁執行元件(jian)。這(zhe)樣，就有(you)可(ke)(ke)能(neng)制造出由少量(liang)元件(jian)組成(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)保(bao)(bao)(bao)(bao)護(hu)裝置(zhi)。 我們(men)知道：有(you)源(yuan)(yuan)必(bi)定(ding)(ding)會帶來(lai)不可(ke)(ke)靠(kao)(kao)(kao)，一(yi)個(ge)(ge)正常(chang)工作(zuo)需(xu)工作(zuo)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，另一(yi)個(ge)(ge)斷(duan)相時，必(bi)定(ding)(ding)會失去工作(zuo)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)，這(zhe)是個(ge)(ge)根本(ben)(ben)無法克(ke)服的(de)(de)(de)(de)(de)矛盾。另外需(xu)長(chang)期(qi)通電(dian)(dian)(dian)(dian)(dian)，容易受(shou)電(dian)(dian)(dian)(dian)(dian)網電(dian)(dian)(dian)(dian)(dian)壓(ya)波動(dong)，大電(dian)(dian)(dian)(dian)(dian)流沖擊的(de)(de)(de)(de)(de)影響，自(zi)身(shen)的(de)(de)(de)(de)(de)故障(zhang)率(lv)會大幅度的(de)(de)(de)(de)(de)提高(gao)，同時增(zeng)加體積(ji)、成(cheng)(cheng)(cheng)本(ben)(ben)，需(xu)考(kao)慮電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)壓(ya)等(deng)級，造成(cheng)(cheng)(cheng)了(le)使(shi)用(yong)(yong)(yong)的(de)(de)(de)(de)(de)不方(fang)(fang)(fang)便。所以(yi)電(dian)(dian)(dian)(dian)(dian)機(ji)保(bao)(bao)(bao)(bao)護(hu)行業以(yi)有(you)源(yuan)(yuan)、無源(yuan)(yuan)作(zuo)為技術進(jin)(jin)步的(de)(de)(de)(de)(de)里程碑。作(zuo)為用(yong)(yong)(yong)戶，選擇時也(ye)(ye)應(ying)(ying)首(shou)先(xian)考(kao)慮無源(yuan)(yuan)化的(de)(de)(de)(de)(de)產(chan)品。
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