3-2

扁(bian)電(dian)纜(lan)使用(yong)于(yu)(yu)工作電(dian)壓450/750V及以下，環境(jing)溫度-40~70℃的起重(zhong)、運(yun)輸(shu)、機械、電(dian)氣(qi)、礦山、等行業(ye)各種移動(dong)(dong)動(dong)(dong)力裝置的電(dian)源連接及控制信(xin)號照明等。絕緣和護套(tao)等用(yong)丁腈復合物(wu)，提高(gao)電(dian)纜(lan)柔軟(ruan)特(te)性及防腐耐寒等性能(neng)。扁(bian)電(dian)纜(lan)的結(jie)構(gou)特(te)點：（1）扁(bian)電(dian)纜(lan)用(yong)于(yu)(yu)動(dong)(dong)力傳輸(shu)線或移動(dong)(dong)電(dian)器用(yong)連接電(dian)纜(lan)，產品具有(you)耐熱輻射、耐寒、耐酸堿及腐蝕性氣(qi)體、防水等特(te)性，電(dian)纜(lan)結(jie)構(gou)柔軟(ruan)，輻射方便，高(gao)溫（...

2-6

船(chuan)用(yong)(yong)電(dian)(dian)纜(lan)(lan)是各類(lei)(lei)船(chuan)舶、海上(shang)(shang)石油平(ping)臺及(ji)水上(shang)(shang)建筑物的電(dian)(dian)力、照明、控制、通信、微機等系(xi)統的電(dian)(dian)線(xian)電(dian)(dian)纜(lan)(lan)。由于使用(yong)(yong)環(huan)境條件較(jiao)嚴酷(ku)，則要求電(dian)(dian)纜(lan)(lan)安(an)全(quan)可靠、壽命長、體積小(xiao)、重量輕，并具有(you)優(you)良(liang)的耐溫、耐火(huo)、阻燃、耐油、防潮、耐海水，優(you)良(liang)電(dian)(dian)氣和機械(xie)性能等要求。從(cong)種(zhong)類(lei)(lei)上(shang)(shang)分(fen)，船(chuan)用(yong)(yong)電(dian)(dian)纜(lan)(lan)可分(fen)為兩類(lei)(lei)：（民）船(chuan)用(yong)(yong)電(dian)(dian)線(xian)電(dian)(dian)纜(lan)(lan)、（軍）艦(jian)用(yong)(yong)電(dian)(dian)線(xian)電(dian)(dian)纜(lan)(lan)。從(cong)用(yong)(yong)途上(shang)(shang)分(fen)，船(chuan)用(yong)(yong)電(dian)(dian)纜(lan)(lan)可分(fen)為三類(lei)(lei)：船(chuan)/艦(jian)用(yong)(yong)電(dian)(dian)力電(dian)(dian)纜(lan)(lan)、船(chuan)...

1-8

發展歷史所謂(wei)溫度(du)變送(song)(song)器(qi)，就(jiu)是將熱電(dian)阻(zu)、熱電(dian)偶、電(dian)阻(zu)及毫伏信號(hao)，轉換成標準兩線制4…20mA，并(bing)將信號(hao)傳(chuan)輸給控制室的(de)設備，一般用于工業(ye)現場。傳(chuan)統(tong)型溫度(du)變送(song)(song)器(qi)量(liang)程范圍(wei)需要改變時，一般通過(guo)調零和調滿2個電(dian)位器(qi)進行調整，但這2個電(dian)位器(qi)是造(zao)成產品(pin)溫度(du)漂(piao)移大的(de)元兇。隨著科技的(de)進步，由于傳(chuan)統(tong)的(de)模擬型溫度(du)變送(song)(song)器(qi)調試(shi)的(de)繁瑣，綜合性能指標較差，已無法(fa)滿足現場用戶(hu)的(de)需求，也無法(fa)滿...

12-13

屏(ping)(ping)蔽電(dian)(dian)纜(lan)是使用金屬網狀(zhuang)編織層(ceng)把信(xin)號線(xian)包裹(guo)起來的(de)傳輸線(xian)。編織層(ceng)一般(ban)是紅銅或者鍍錫銅。屏(ping)(ping)蔽是為了保證在(zai)有電(dian)(dian)磁(ci)干擾(rao)(rao)環境(jing)下系統(tong)的(de)傳輸性能(neng)，這(zhe)里(li)的(de)抗干擾(rao)(rao)性應包括兩(liang)個(ge)方面(mian)，即抵御外(wai)來電(dian)(dian)磁(ci)干擾(rao)(rao)的(de)能(neng)力(li)以(yi)及系統(tong)本(ben)身向外(wai)輻射(she)電(dian)(dian)磁(ci)干擾(rao)(rao)的(de)能(neng)力(li)。理(li)論(lun)上講(jiang)，在(zai)線(xian)纜(lan)和連接件(jian)外(wai)表包上一層(ceng)金屬材料(liao)屏(ping)(ping)蔽層(ceng)，可以(yi)有效(xiao)地濾除不必要(yao)的(de)電(dian)(dian)磁(ci)波（這(zhe)也是絕大多(duo)數屏(ping)(ping)蔽系統(tong)采(cai)用的(de)方法），然(ran)而，這(zhe)種方法的(de)有效(xiao)程...

11-13

同軸電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)可(ke)(ke)分為兩種基(ji)本(ben)類型(xing)，基(ji)帶(dai)同軸電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)和(he)寬帶(dai)同軸電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)。基(ji)帶(dai)同軸電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)基(ji)帶(dai)同軸電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)的屏蔽層通(tong)常是用(yong)(yong)銅做成的網(wang)狀結(jie)構(gou)，其特征阻抗為5092。該電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)用(yong)(yong)于(yu)傳輸數字信號，常用(yong)(yong)的型(xing)號一般(ban)有(you)RG-8(粗(cu)(cu)纜(lan)(lan)(lan))和(he)RG-58(細纜(lan)(lan)(lan))。粗(cu)(cu)纜(lan)(lan)(lan)與細纜(lan)(lan)(lan)直觀的區別在(zai)于(yu)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)直徑不同。粗(cu)(cu)纜(lan)(lan)(lan)適用(yong)(yong)于(yu)比較大(da)(da)型(xing)的局部網(wang)絡，它的標(biao)準距離長，可(ke)(ke)靠性(xing)高(gao)；但是粗(cu)(cu)纜(lan)(lan)(lan)網(wang)絡必須安裝收(shou)發器和(he)收(shou)發器電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)(lan)，安裝難(nan)度也大(da)(da)...

10-21

耐磨熱(re)(re)電阻是電廠(chang)循(xun)環流化床鍋爐(lu),沸(fei)騰鍋爐(lu),粉(fen)磨煤機(ji)造氣爐(lu)和(he)水泥廠(chang)系(xi)列窯(yao)(yao)頭,窯(yao)(yao)尾,爐(lu)頭罩及化工,冶煉等高(gao)(gao)溫耐磨環境較為理(li)想(xiang)的高(gao)(gao)技(ji)術類產(chan)(chan)(chan)品(pin)。耐磨熱(re)(re)電阻和(he)耐磨熱(re)(re)電偶一樣都是電廠(chang)循(xun)環流化訂鍋爐(lu),沸(fei)騰鍋爐(lu),粉(fen)磨煤機(ji)造氣爐(lu)和(he)水泥廠(chang)系(xi)列窯(yao)(yao)頭,窯(yao)(yao)尾,爐(lu)頭罩及化工,冶煉等高(gao)(gao)溫耐磨環境較為理(li)想(xiang)的高(gao)(gao)技(ji)術類產(chan)(chan)(chan)品(pin),耐磨熱(re)(re)電阻博采眾長(chang),采用*的工藝配(pei)方,在失態(tai)平衡中制作(zuo)出耐磨合(he)金該產(chan)(chan)(chan)品(pin)...

9-12

一般(ban)人(ren)很容易混(hun)淆(xiao)阻(zu)燃(ran)電(dian)(dian)(dian)纜和耐(nai)(nai)(nai)火(huo)(huo)電(dian)(dian)(dian)纜的概(gai)念，雖然阻(zu)燃(ran)電(dian)(dian)(dian)纜有許多較(jiao)適用于化工企業(ye)的優點，如低鹵(lu)、低煙阻(zu)燃(ran)等，但在一般(ban)情況下，耐(nai)(nai)(nai)火(huo)(huo)電(dian)(dian)(dian)纜可(ke)以(yi)取代阻(zu)燃(ran)電(dian)(dian)(dian)纜，而阻(zu)燃(ran)電(dian)(dian)(dian)纜不能取代耐(nai)(nai)(nai)火(huo)(huo)電(dian)(dian)(dian)纜。他們的區(qu)別(bie)主要在于：1原(yuan)理(li)的區(qu)別(bie)耐(nai)(nai)(nai)火(huo)(huo)電(dian)(dian)(dian)纜與阻(zu)燃(ran)電(dian)(dian)(dian)纜的原(yuan)理(li)不同。含鹵(lu)電(dian)(dian)(dian)纜阻(zu)燃(ran)原(yuan)理(li)是靠鹵(lu)素的阻(zu)燃(ran)效應(ying)，無鹵(lu)電(dian)(dian)(dian)纜阻(zu)燃(ran)原(yuan)理(li)是靠析(xi)出水(shui)降(jiang)低溫(wen)度來熄滅火(huo)(huo)焙(bei)．耐(nai)(nai)(nai)火(huo)(huo)電(dian)(dian)(dian)纜是靠耐(nai)(nai)(nai)火(huo)(huo)層中(zhong)云母材料的耐(nai)(nai)(nai)火(huo)(huo)、耐(nai)(nai)(nai)熱的...