SGB10-200KVA/10KV/0.4KV非包封干式變壓器樹脂(zhi)滲透性好、無氣(qi)泡，因(yin)而局放電(dian)量小。高、低(di)壓(ya)線圈(quan)緊密配合具有(you)較強的結構強度(du)，從(cong)而保證具有(you)較強的抗(kang)短路(lu)能力和抗(kang)振(zhen)動能力。當配變(bian)(bian)在(zai)三(san)相負載(zai)平衡時運行，其三(san)相電(dian)流基本(ben)相等(deng)(deng)，配變(bian)(bian)內部(bu)每(mei)相壓(ya)降(jiang)也(ye)基本(ben)相同(tong)，則(ze)配變(bian)(bian)輸出的三(san)相電(dian)壓(ya)也(ye)是平衡的。假如配變(bian)(bian)在(zai)三(san)相負載(zai)不平衡時運行，其各相輸出電(dian)流就(jiu)不相等(deng)(deng)，其配變(bian)(bian)內部(bu)三(san)相壓(ya)降(jiang)就(jiu)不相等(deng)(deng)，這(zhe)必將導致配變(bian)(bian)輸出電(dian)壓(ya)三(san)相不平衡。所以說平常在(zai)使用變(bian)(bian)壓(ya)器的時候一定要注(zhu)意這(zhe)方面(mian)的知識。

　　輸出(chu)電(dian)抗器(qi)(qi)的主要作用是用于延長電(dian)力(li)變壓器(qi)(qi)的有(you)效(xiao)傳輸距(ju)離，有(you)效(xiao)抑制(zhi)電(dian)力(li)變壓器(qi)(qi)的IGBT模塊時產生的瞬間，降低電(dian)動機的噪聲，降低渦(wo)流損耗，保護電(dian)力(li)變壓器(qi)(qi)內(nei)部(bu)的功(gong)率(lv)器(qi)(qi)件(jian)。

　　在(zai)利用電(dian)力變壓(ya)器(qi)進行(xing)調速控制時，由(you)于高次諧波(bo)的影(ying)響，電(dian)動機(ji)產(chan)生(sheng)的電(dian)磁噪聲(sheng)(sheng)和金屬音(yin)噪聲(sheng)(sheng)將大于采用電(dian)網電(dian)力變壓(ya)器(qi)直(zhi)接驅(qu)動時。通常電(dian)動機(ji)的噪聲(sheng)(sheng)為70~80dB， 通過接入輸出電(dian)抗器(qi)，可以將噪聲(sheng)(sheng)降低5dB左右。

　　當(dang)負載電(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)(de)阻抗比標準電(dian)(dian)動(dong)(dong)機(ji)(ji)小時(例如，驅動(dong)(dong)電(dian)(dian)動(dong)(dong)機(ji)(ji)和8極電(dian)(dian)動(dong)(dong)機(ji)(ji)，電(dian)(dian)力(li)變壓(ya)器(qi)的(de)(de)(de)(de)容量小于電(dian)(dian)動(dong)(dong)機(ji)(ji)的(de)(de)(de)(de)容量，以及希望將電(dian)(dian)力(li)變壓(ya)器(qi)的(de)(de)(de)(de)啟動(dong)(dong)轉矩增(zeng)加10%~20%時等，隨(sui)著電(dian)(dian)動(dong)(dong)機(ji)(ji)電(dian)(dian)流的(de)(de)(de)(de)增(zeng)加，有可能出現由過(guo)電(dian)(dian)流造成的(de)(de)(de)(de)保護(hu)電(dian)(dian)路誤動(dong)(dong)作，或電(dian)(dian)力(li)變壓(ya)器(qi)進入限流動(dong)(dong)作以至(zhi)于得不到(dao)足夠大的(de)(de)(de)(de)轉矩，使轉矩效率降低，電(dian)(dian)動(dong)(dong)機(ji)(ji)過(guo)熱(re)。