降(jiang)(jiang)壓(ya)啟(qi)動(dong)(dong)(dong)時(shi)可以帶(dai)(dai)(dai)(dai)負(fu)載(zai)(zai),斷路器(qi)容量太小!電機(ji)雖是降(jiang)(jiang)壓(ya)啟(qi)動(dong)(dong)(dong),但帶(dai)(dai)(dai)(dai)負(fu)荷啟(qi)動(dong)(dong)(dong)時(shi)滯轉(zhuan)電流(liu)太大! 三(san)相電電壓(ya)正常(chang)一(yi)(yi)帶(dai)(dai)(dai)(dai)負(fu)載(zai)(zai)跳閘 樓(lou)主講的(de)三(san)線只有三(san)根火(huo)線的(de)漏應該為3P漏電保護器(qi)。這(zhe)種(zhong)保護器(qi)是不(bu)(bu)(bu)需要接零線所(suo)以不(bu)(bu)(bu)能一(yi)(yi)概而論以電機(ji)功率(lv)的(de)大小來確定是否(fou)采用星(xing)三(san)角啟(qi)動(dong)(dong)(dong)如果啟(qi)動(dong)(dong)(dong)時(shi)負(fu)載(zai)(zai)過重由(you)于啟(qi)動(dong)(dong)(dong)轉(zhuan)矩降(jiang)(jiang)為額定轉(zhuan)矩的(de)三(san)分之一(yi)(yi)有可能會帶(dai)(dai)(dai)(dai)不(bu)(bu)(bu)動(dong)(dong)(dong)電機(ji)一(yi)(yi)般在啟(qi)動(dong)(dong)(dong)時(shi)負(fu)載(zai)(zai)輕運行時(shi)負(fu)載(zai)(zai)重的(de)情況(kuang)[鮮花][開(kai)心]您好(hao)親,很高(gao)興為您解(jie)答, 自耦降(jiang)(jiang)壓(ya)啟(qi)動(dong)(dong)(dong)控制(zhi)柜(ju)不(bu)(bu)(bu)帶(dai)(dai)(dai)(dai)負(fu)載(zai)(zai)可以運行嗎答：親,您好(hao),不(bu)(bu)(bu)可以不(bu)(bu)(bu)帶(dai)(dai)(dai)(dai)負(fu)荷不(bu)(bu)(bu)能,主要是看啟(qi)動(dong)(dong)(dong)柜(ju)的(de)啟(qi)動(dong)(dong)(dong)原理。如果降(jiang)(jiang)壓(ya)與全壓(ya)采用。

答發電(dian)(dian)(dian)(dian)機(ji)轉(zhuan)子以額定轉(zhuan)速旋(xuan)轉(zhuan),定子繞組開路(不帶負(fu)載),運行時,其電(dian)(dian)(dian)(dian)勢Eo,與(yu)勵磁電(dian)(dian)(dian)(dian)流(liu)(liu)Il之間的(de)(de)關(guan)系曲線(xian)。 28、電(dian)(dian)(dian)(dian)樞反(fan)應 答:同(tong)步發電(dian)(dian)(dian)(dian)機(ji)在(zai)負(fu)載情況(kuang)下(xia),定子繞組里的(de)(de)【單選題(ti)】電(dian)(dian)(dian)(dian)流(liu)(liu)流(liu)(liu)過負(fu)載時,負(fu)載將電(dian)(dian)(dian)(dian)能鏡換成(cheng)()。 A. 機(ji)械能 B. 熱(re)能 C. 光能 D. 其他(ta)形式(shi)的(de)(de)能 查看完(wan)整題(ti)目與(yu)答案(an) 【單選題(ti)】定子繞組串電(dian)(dian)(dian)(dian)阻的(de)(de)降(jiang)壓(ya)啟動(dong)是指電(dian)(dian)(dian)(dian)動(dong)機(ji)啟動(dong)時對降(jiang)壓(ya)啟動(dong)的(de)(de)三相電(dian)(dian)(dian)(dian)動(dong)機(ji)的(de)(de)負(fu)載要求是：電(dian)(dian)(dian)(dian)動(dong)機(ji)承(cheng)擔的(de)(de)輸出轉(zhuan)矩,不隨電(dian)(dian)(dian)(dian)機(ji)的(de)(de)轉(zhuan)速變化(hua)而改變,即啟動(dong)電(dian)(dian)(dian)(dian)流(liu)(liu)不隨轉(zhuan)速的(de)(de)改變而有較大的(de)(de)變化(hua)。。

Elspec EqualizerST是(shi)一種應用(yong)(yong)(yong)于電(dian)機(ji)起(qi)動(dong)(dong)的(de)、實時快速無功補償系統,適合于電(dian)機(ji)帶(dai)負(fu)載直接起(qi)動(dong)(dong)、解決(jue)電(dian)壓(ya)(ya)(ya)跌(die)落問題,目標客戶是(shi)鋼鐵、水電(dian)、化工(gong)、港(gang)口、油田(tian)、水泥(ni)等行業大容[鮮花(hua)][開心]您好親,很高興(xing)為(wei)您解答, 自耦降(jiang)壓(ya)(ya)(ya)啟(qi)動(dong)(dong)控制柜不帶(dai)負(fu)載可以運(yun)行嗎(ma)答：親,您好,不可以不帶(dai)負(fu)荷(he)不能,主(zhu)要是(shi)看啟(qi)動(dong)(dong)柜的(de)啟(qi)動(dong)(dong)原理。如果(guo)降(jiang)壓(ya)(ya)(ya)與全壓(ya)(ya)(ya)采用(yong)(yong)(yong)2、起(qi)動(dong)(dong)時的(de)注意(yi)事項 ①電(dian)動(dong)(dong)機(ji)允許滿壓(ya)(ya)(ya)起(qi)動(dong)(dong)或降(jiang)壓(ya)(ya)(ya)起(qi)動(dong)(dong)(用(yong)(yong)(yong)電(dian)抗(kang)或Y一△),但應注意(yi)滿壓(ya)(ya)(ya)起(qi)動(dong)(dong)時大約(yue)5—7倍額(e)定(ding)電(dian)流(liu),降(jiang)壓(ya)(ya)(ya)啟(qi)動(dong)(dong)時轉距(ju)與電(dian)壓(ya)(ya)(ya)平方成正比(bi),當(dang)電(dian)網容量不足(zu)。

降低啟(qi)(qi)動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)。低壓(ya)(ya)(ya)50HZ啟(qi)(qi)動(dong)(dong),電(dian)(dian)(dian)(dian)(dian)(dian)(dian)磁轉矩很(hen)小,所以不(bu)能帶(dai)大負(fu)(fu)載(zai)(zai)；電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)啟(qi)(qi)動(dong)(dong)瞬間,產生的(de)(de)啟(qi)(qi)動(dong)(dong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)為額定電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)5——7倍,這樣的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)對(dui)(dui)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)本(ben)身(shen)和(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)網都不(bu)利一般都是(shi)(shi)風機(ji)、水(shui)泵負(fu)(fu)載(zai)(zai),重(zhong)載(zai)(zai)的(de)(de)不(bu)合(he)適(shi)。降壓(ya)(ya)(ya)啟(qi)(qi)動(dong)(dong)過程(cheng)中效率很(hen)低,輸出功(gong)(gong)率遠小于額定功(gong)(gong)率,只能輕載(zai)(zai)或空載(zai)(zai),要是(shi)(shi)帶(dai)重(zhong)載(zai)(zai)容易出現堵轉。重(zhong)載(zai)(zai)場合(he)不(bu)用鼠籠型電(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji),都三(san)相(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)(dong)機(ji)星三(san)角(jiao)形(xing)降壓(ya)(ya)(ya)啟(qi)(qi)動(dong)(dong) 二、負(fu)(fu)載(zai)(zai)的(de)(de)三(san)角(jiao)形(xing)聯接 Il IP 不(bu)論負(fu)(fu)載(zai)(zai)是(shi)(shi)否(fou)對(dui)(dui)稱,各相(xiang)(xiang)負(fu)(fu)載(zai)(zai)所承受的(de)(de) 電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)均為對(dui)(dui)稱的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)源線電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya) 對(dui)(dui)稱的(de)(de)三(san)相(xiang)(xiang)負(fu)(fu)載(zai)(zai)三(san)角(jiao)形(xing)聯接時,線電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)與 相(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)關系。

一(yi)般在(zai)啟(qi)動(dong)(dong)(dong)時負載(zai)輕、運行時負載(zai)重的(de)情況下,可以(yi)考慮使采用(yong)星(xing)(xing)三角(jiao)啟(qi)動(dong)(dong)(dong),通常鼠(shu)籠型電(dian)(dian)(dian)機的(de)啟(qi)動(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)是(shi)運行電(dian)(dian)(dian)流(liu)的(de)57倍(bei),而電(dian)(dian)(dian)網對(dui)(dui)(dui)電(dian)(dian)(dian)壓(ya)(ya)要求一(yi)般為(wei)(wei)正(zheng)負10%,為(wei)(wei)了使電(dian)(dian)(dian)機啟(qi)動(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)不(bu)對(dui)(dui)(dui)電(dian)(dian)(dian)網電(dian)(dian)(dian)起(qi)動(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)為(wei)(wei)額(e)定電(dian)(dian)(dian)流(liu)的(de)1.2~1.5倍(bei),起(qi)動(dong)(dong)(dong)轉矩為(wei)(wei)70%~120%額(e)定轉矩對(dui)(dui)(dui)于帶有轉矩自動(dong)(dong)(dong)增強功(gong)能的(de)變頻(pin)器,起(qi)動(dong)(dong)(dong)轉矩為(wei)(wei)以(yi)上,可以(yi)帶全負載(zai)起(qi)動(dong)(dong)(dong)。 7、V/f模式是(shi)什么(me)意(yi)思3、啟(qi)動(dong)(dong)(dong)功(gong)率大(da)小(xiao)(xiao)不(bu)同。星(xing)(xing)三角(jiao)啟(qi)動(dong)(dong)(dong),屬降壓(ya)(ya)啟(qi)動(dong)(dong)(dong),以(yi)犧牲(sheng)功(gong)率為(wei)(wei)代價(jia)來(lai)(lai)換取降低啟(qi)動(dong)(dong)(dong)電(dian)(dian)(dian)流(liu)來(lai)(lai)實現的(de)。所以(yi)不(bu)能一(yi)概而輪,以(yi)電(dian)(dian)(dian)機功(gong)率的(de)大(da)小(xiao)(xiao)來(lai)(lai)確定是(shi)否(fou)需采用(yong)星(xing)(xing)三角(jiao)啟(qi)動(dong)(dong)(dong),。

16.變壓(ya)器(qi)負(fu)(fu)(fu)(fu)載(zai)(zai)運行(xing)(xing)(xing)并且其(qi)負(fu)(fu)(fu)(fu)載(zai)(zai)的功(gong)率(lv)一定時(shi),變壓(ya)器(qi)的效率(lv)和(he)(D)的關系,叫變壓(ya)器(qi)負(fu)(fu)(fu)(fu)載(zai)(zai)運行(xing)(xing)(xing)的效率(lv)特性。A、時(shi)間B、主(zhu)磁通C、負(fu)(fu)(fu)(fu)載(zai)(zai)電(dian)(dian)流(liu)D、變壓(ya)比(bi)17.變壓(ya)器(qi)負(fu)(fu)(fu)(fu)載(zai)(zai)運行(xing)(xing)(xing)時(shi),兩種啟(qi)(qi)(qi)(qi)動(dong)方法直(zhi)接(jie)啟(qi)(qi)(qi)(qi)動(dong)和(he)降壓(ya)啟(qi)(qi)(qi)(qi)動(dong),直(zhi)接(jie)啟(qi)(qi)(qi)(qi)動(dong)剛才已(yi)經(jing)說了, 分析:22kw 電(dian)(dian)機(ji)直(zhi)接(jie)啟(qi)(qi)(qi)(qi)動(dong)時(shi)啟(qi)(qi)(qi)(qi)動(dong)瞬時(shi)電(dian)(dian)流(liu) 45 乘(cheng)(57 取 6)等(deng)于 270A 電(dian)(dian)流(liu), 采用星角(jiao)啟(qi)(qi)(qi)(qi)動(dong)電(dian)(dian)流(liu)降為√3/3 但啟(qi)(qi)(qi)(qi)動(dong)轉(zhuan)矩(ju)也降例星三角(jiao)啟(qi)(qi)(qi)(qi)動(dong)、降壓(ya)啟(qi)(qi)(qi)(qi)動(dong)、目前先進的變頻啟(qi)(qi)(qi)(qi)動(dong)等(deng),因(yin)電(dian)(dian)機(ji)功(gong)率(lv)大,啟(qi)(qi)(qi)(qi)動(dong)困難(nan)才采取以(yi)上(shang)措施,若(ruo)是在帶負(fu)(fu)(fu)(fu)荷(he)啟(qi)(qi)(qi)(qi)動(dong),那豈不是雪上(shang)加霜嗎,所(suo)以(yi)大功(gong)率(lv)電(dian)(dian)機(ji)拖動(dong)明(ming)確規(gui)定是不。

——這是(shi)為什么電(dian)(dian)(dian)(dian)(dian)氣(qi)設備在(zai)(zai)啟(qi)動時,不提倡或(huo)不要(yao)或(huo)嚴(yan)禁(jin)帶(dai)負(fu)(fu)荷啟(qi)動。低負(fu)(fu)荷啟(qi)動是(shi)一個道理。一般在(zai)(zai)啟(qi)動時負(fu)(fu)載(zai)輕、運行時負(fu)(fu)載(zai)重的(de)(de)(de)(de)情況下(xia)可采(cai)用星三角啟(qi)動,通常鼠籠型電(dian)(dian)(dian)(dian)(dian)機的(de)(de)(de)(de)啟(qi)動電(dian)(dian)(dian)(dian)(dian)流(liu)是(shi)運行電(dian)(dian)(dian)(dian)(dian)流(liu)的(de)(de)(de)(de)57倍,而電(dian)(dian)(dian)(dian)(dian)網對電(dian)(dian)(dian)(dian)(dian)壓(ya)要(yao)求一般是(shi)正(zheng)負(fu)(fu)10%,為了使電(dian)(dian)(dian)(dian)(dian)機啟(qi)動電(dian)(dian)(dian)(dian)(dian)流(liu)不對電(dian)(dian)(dian)(dian)(dian)網電(dian)(dian)(dian)(dian)(dian)壓(ya)形(xing)成(cheng)過大的(de)(de)(de)(de)16.變(bian)壓(ya)器(qi)負(fu)(fu)載(zai)運行并且其(qi)負(fu)(fu)載(zai)的(de)(de)(de)(de)功率一定時,變(bian)壓(ya)器(qi)的(de)(de)(de)(de)效率和(D)的(de)(de)(de)(de)關(guan)系,叫(jiao)變(bian)壓(ya)器(qi)負(fu)(fu)載(zai)運行的(de)(de)(de)(de)效率特性。A、時間B、主磁通C、負(fu)(fu)載(zai)電(dian)(dian)(dian)(dian)(dian)流(liu)D、變(bian)壓(ya)比17.變(bian)壓(ya)器(qi)負(fu)(fu)載(zai)運行時,。

降壓啟動(dong)(dong)時(shi)(shi)(shi)(shi)可(ke)以帶負載,反(fan)抗轉(zhuan)矩(ju)的(de)方向(xiang)與運動(dong)(dong)方向(xiang)相反(fan),,方向(xiang)發生改變時(shi)(shi)(shi)(shi),負載轉(zhuan)矩(ju)的(de)方向(xiang)也會隨著改變,因而他總(zong)是(shi)阻礙(ai)運動(dong)(dong)的(de).位能(neng)轉(zhuan)矩(ju)的(de)作用方向(xiang)恒定,與運動(dong)(dong)方向(xiang)無關,它在某方向(xiang)阻礙(ai)運Y—△降壓啟動(dong)(dong)星(xing)形的(de)啟動(dong)(dong)任務已經完(wan)成如果再等(deng)5妙10秒(miao)15秒(miao)對(dui)電(dian)(dian)機的(de)轉(zhuan)速絲毫不(bu)(bu)會有什(shen)么變化這種等(deng)待是(shi)徒勞無益的(de)負載較重可(ke)能(neng)還會引起熱繼電(dian)(dian)器(qi)動(dong)(dong)作因此星(xing)形啟動(dong)(dong)完(wan)成后達到恒速時(shi)(shi)(shi)(shi)間繼電(dian)(dian)器(qi)應該動(dong)(dong)作轉(zhuan)應急供電(dian)(dian)時(shi)(shi)(shi)(shi)是(shi)單(dan)相輸(shu)(shu)(shu)出(chu)回路不(bu)(bu)存(cun)在偏相而KMYJS系(xi)列FEPS是(shi)三(san)相輸(shu)(shu)(shu)出(chu)雖然缺(que)相可(ke)運行但每一相的(de)輸(shu)(shu)(shu)出(chu)功率僅為FEPS標(biao)稱(cheng)容量的(de)13不(bu)(bu)可(ke)偏差太多2當(dang)用KMYJSS系(xi)列FEPS帶混。

降壓啟動(dong)(dong)(dong)時可以帶(dai)負(fu)(fu)(fu)(fu)(fu)載(zai),軟啟動(dong)(dong)(dong)器可以不(bu)帶(dai)負(fu)(fu)(fu)(fu)(fu)載(zai)啟動(dong)(dong)(dong)運行(xing)。軟啟動(dong)(dong)(dong)器是一(yi)種(zhong)集軟啟動(dong)(dong)(dong)、軟停車、輕載(zai)節能(neng)和(he)多(duo)功(gong)能(neng)保護于(yu)一(yi)體的(de)(de)電(dian)機控制裝備。實現在(zai)整個啟動(dong)(dong)(dong)過程中無沖擊而(er)平滑的(de)(de)啟動(dong)(dong)(dong)電(dian)機,而(er)電(dian)機的(de)(de)極(ji)對數越(yue)(yue)多(duo),電(dian)機的(de)(de)轉(zhuan)(zhuan)速越(yue)(yue)低,但它(ta)的(de)(de)扭距(ju)越(yue)(yue)大(da)在(zai)選用(yong)電(dian)機時,您要考慮負(fu)(fu)(fu)(fu)(fu)載(zai)需要多(duo)大(da)的(de)(de)起(qi)(qi)動(dong)(dong)(dong)扭距(ju),比(bi)如(ru)像帶(dai)負(fu)(fu)(fu)(fu)(fu)載(zai)起(qi)(qi)動(dong)(dong)(dong)的(de)(de)比(bi)空載(zai)起(qi)(qi)動(dong)(dong)(dong)的(de)(de)需要扭距(ju)大(da),如(ru)果是大(da)所以不(bu)能(neng)一(yi)概而(er)論(lun)以電(dian)機功(gong)率的(de)(de)大(da)小(xiao)來(lai)確定是否采(cai)用(yong)星三角啟動(dong)(dong)(dong)如(ru)果啟動(dong)(dong)(dong)時負(fu)(fu)(fu)(fu)(fu)載(zai)過重由于(yu)啟動(dong)(dong)(dong)轉(zhuan)(zhuan)矩(ju)降為額定轉(zhuan)(zhuan)矩(ju)的(de)(de)三分之一(yi)有可能(neng)會帶(dai)不(bu)動(dong)(dong)(dong)電(dian)機一(yi)般在(zai)啟動(dong)(dong)(dong)時負(fu)(fu)(fu)(fu)(fu)載(zai)輕運行(xing)時負(fu)(fu)(fu)(fu)(fu)載(zai)重的(de)(de)情況。

降(jiang)壓(ya)啟(qi)動(dong)(dong)(dong)時(shi)可以帶(dai)負(fu)載,Elspec EqualizerST是一種(zhong)應用(yong)于(yu)電(dian)機(ji)(ji)起動(dong)(dong)(dong)的、實時(shi)快速無功(gong)補償系統,適(shi)合于(yu)電(dian)機(ji)(ji)帶(dai)負(fu)載直接起動(dong)(dong)(dong)、解(jie)決電(dian)壓(ya)跌落問題,目(mu)標客戶是鋼鐵、水電(dian)、化工(gong)、港口(kou)、油(you)田(tian)、水泥(ni)等行(xing)業大容TstY=Tst△/3 =1.2* TN /3 =0.4 TN 當(dang)負(fu)載轉矩為 0.45 TN 時(shi)電(dian)動(dong)(dong)(dong)機(ji)(ji)不(bu)能(neng)啟(qi)動(dong)(dong)(dong) 當(dang)負(fu)載轉矩為 0.35 TN 時(shi)電(dian)動(dong)(dong)(dong)機(ji)(ji)能(neng)啟(qi)動(dong)(dong)(dong) ③ 若采(cai)用(yong)自耦變壓(ya)器降(jiang)壓(ya)啟(qi)動(dong)(dong)(dong),設降(jiang)壓(ya)比為 0.64,求電(dian)源線路。