電磁(ci)系儀表由軟磁(ci)材料可(ke)動鐵片(pian)受固定(ding)線(xian)圈(quan)的(de)磁(ci)場吸引或被(bei)固定(ding)線(xian)圈(quan)電流同(tong)時(shi)磁(ci)化的(de)靜動鐵片(pian)間的(de)排斥(chi)力(li)所(suo)驅(qu)動的(de)儀表。用軟磁(ci)材料制成圓(yuan)筒(tong)形屏(ping)蔽罩,將整個測量機構屏(ping)蔽起來。為了提高屏(ping)蔽效果,在準確度較高的(de)儀表中,往往采用雙(shuang)層(ceng)屏(ping)蔽
2020-10-19游絲用(yong)來產生反作用(yong)力矩(ju),同時作為動(dong)圈(quan)電流的(de)引人、引出元器件(jian),空氣阻尼器是用(yong)來產生阻尼力矩(ju)的(de)。圖1電動(dong)系測(ce)量機構(gou)的(de)結構(gou):1-固(gu)定線(xian)圈(quan)。兩(liang)個電磁線(xian)圈(quan),即固(gu)定線(xian)圈(quan)1(簡(jian)稱定圈(quan))和可動(dong)線(xian)圈(quan)6(簡(jian)稱動(dong)圈(quan)),其(qi)中固(gu)定線(xian)圈(quan)1分為平行排列的(de)兩(liang)個部分,使固(gu)定線(xian)圈(quan)的(de)兩(liang)部分之間的(de)電磁場均稱
2020-10-16繼電保(bao)護(hu)(hu)(hu)檢(jian)測(ce)校驗(yan)所用(yong)(yong)的(de)儀(yi)器儀(yi)表(biao)(biao),可通過我公(gong)司生產(chan)經營(ying)的(de)保(bao)護(hu)(hu)(hu)類(lei)產(chan)品繼電保(bao)護(hu)(hu)(hu)校驗(yan)儀(yi)配合電秒表(biao)(biao)、兆歐表(biao)(biao)(2500V)、溫濕(shi)度計及(ji)常用(yong)(yong)工具儀(yi)表(biao)(biao)(標準表(biao)(biao)、萬用(yong)(yong)表(biao)(biao)和各類(lei)小(xiao)線夾及(ji)短線)完成。從繼電保(bao)護(hu)(hu)(hu)事故的(de)產(chan)生原因(yin)來看,繼電保(bao)護(hu)(hu)(hu)事故可分為(wei)以下幾類(lei):
2020-10-14實際上,變壓器差動保護在運行時(shi)(包括區外故障時(shi))存在差流(liu)(liu)(不平衡(heng)電(dian)(dian)流(liu)(liu)),接(jie)下來從穩態(tai)(tai)與(yu)暫態(tai)(tai)情況(kuang)(kuang)下進行分(fen)析。暫態(tai)(tai)情況(kuang)(kuang):其一、短路電(dian)(dian)流(liu)(liu)非周期分(fen)量主要(yao)為電(dian)(dian)流(liu)(liu)互感器的勵磁電(dian)(dian)流(liu)(liu),使其鐵芯飽和(he),誤差變大引(yin)起(qi)不平衡(heng)電(dian)(dian)流(liu)(liu)
2020-10-13淺談變(bian)(bian)(bian)壓(ya)器變(bian)(bian)(bian)比(bi)測(ce)試(shi)(shi)的必要性(xing)一般(ban)情況下(xia),我們(men)可(ke)以選擇變(bian)(bian)(bian)比(bi)測(ce)試(shi)(shi)儀來(lai)進(jin)行各種類(lei)別變(bian)(bian)(bian)壓(ya)器的變(bian)(bian)(bian)比(bi)測(ce)試(shi)(shi),XHBB128系列的變(bian)(bian)(bian)壓(ya)器變(bian)(bian)(bian)比(bi)測(ce)試(shi)(shi)儀使用全中文菜單(dan),操(cao)作簡單(dan)方便,既可(ke)進(jin)行單(dan)相(xiang)測(ce)量(liang),又(you)可(ke)實現三相(xiang)繞(rao)組(zu)的自(zi)動測(ce)試(shi)(shi),單(dan)相(xiang)、三相(xiang)均可(ke)測(ce)量(liang)極性(xing),聯接組(zu)別可(ke)任意選擇,一次(ci)完成測(ce)量(liang)AB、BC、CA三相(xiang)...
2020-10-12