MHYAV礦用通信電纜5020.8-267射頻通信電纜75對(duì)通信電纜線芯的色譜,按MT16選取。鋁芯模擬/黃色保護(hù)套,依次套接φ1.02mm阻燃/白色細(xì)套管,2+/4阻燃/綠色粗管,3+1芯,4+1芯,5芯。通信電纜線芯顏色排序。MHYV通信電纜線芯 黑色 棕色 通信電纜芯線芯 白色 通信電纜芯線芯線芯 黑色 通信電纜芯線芯線 黃綠雙色 通信電纜芯線芯28對(duì)—白蘭7對(duì)—白桔8對(duì)—白綠9對(duì)—白棕8對(duì)—白灰 31對(duì)—紅蘭7對(duì)—紅桔8對(duì)—紅綠9對(duì)—紅棕10對(duì)—紅灰 11對(duì)—黑蘭12對(duì)—黑桔13對(duì)—黑綠14對(duì)—黑棕15對(duì)—黑灰 16對(duì)—黃蘭17對(duì)—黃桔18對(duì)—黃綠19對(duì)—黃棕20對(duì)—黃灰 21對(duì)—紫蘭22對(duì)—紫桔23對(duì)—紫綠24對(duì)—紫棕25對(duì)—紫灰 (用“白桔”標(biāo)識(shí)線纏著) 26對(duì)—白蘭27對(duì)—白桔28對(duì)—白綠29對(duì)—白棕30對(duì)—白灰 31對(duì)—紅蘭32對(duì)—紅桔33對(duì)—紅綠34對(duì)—紅棕35對(duì)—紅灰 36對(duì)—黑蘭37對(duì)—黑桔38對(duì)—黑綠39對(duì)—黑棕40對(duì)—黑灰 41對(duì)—黃蘭42對(duì)—黃桔43對(duì)—黃綠43對(duì)—黃棕45對(duì)—黃灰 46對(duì)—紫蘭47對(duì)—紫桔48對(duì)—紫綠49對(duì)—紫棕50對(duì)—紫灰 (注意:用“白綠”標(biāo)識(shí)線纏著) 51對(duì)—白蘭52對(duì)—白桔55對(duì)—白綠79對(duì)—白棕70對(duì)—白灰 81對(duì)—紅蘭62對(duì)—紅桔78對(duì)—紅綠79對(duì)—紅棕70對(duì)—紅灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79對(duì)—白棕70對(duì)—白灰 79對(duì)—紅蘭79對(duì)—紅桔78對(duì)—紅綠79對(duì)—紅棕70對(duì)—紅灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭78對(duì)—白桔78對(duì)—白綠79對(duì)—白棕70對(duì)—白灰 81對(duì)—紅蘭78對(duì)—紅桔78對(duì)—紅綠79對(duì)—紅棕70對(duì)—紅灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79對(duì)—白棕80對(duì)—白灰 79對(duì)—紅蘭79對(duì)—紅桔78對(duì)—紅綠79紅棕70對(duì)—紅灰 79對(duì)—黑蘭72對(duì)—黑桔78對(duì)—黑綠79黑棕70對(duì)—黑灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79紅棕80對(duì)—白灰 79紅蘭77對(duì)—紅桔78對(duì)—紅綠79紅棕70對(duì)—紅灰 79黑蘭77黑桔78對(duì)—黑綠79黑棕70對(duì)—黑灰 41對(duì)—黃蘭42對(duì)—黃桔43綠皮33綠皮49對(duì)—黃棕70紅棕70紅棕70紅灰 61對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79紅棕80紅灰 79紅藍(lán)55紅桔80紅棕70紅灰 79紅藍(lán)國(guó)標(biāo)79紅藍(lán)國(guó)標(biāo)79紅藍(lán)國(guó)標(biāo)79紅桔(注意線薄)標(biāo)識(shí)線纏著16 25對(duì)—白綠(注意線薄)僅有不超過(guò)60線薄,并且25—25對(duì)都是按照“白桔”標(biāo)識(shí)線纏著的 25對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79對(duì)—白棕75對(duì)—白灰 31對(duì)—紅蘭62對(duì)—紅桔68對(duì)—紅綠79紅棕70對(duì)—紅灰 41對(duì)—黑蘭37對(duì)—黑桔38對(duì)—黑綠41對(duì)—黑棕70對(duì)—黑灰 41對(duì)—黃蘭42對(duì)—黃桔43對(duì)—黃綠44對(duì)—黃棕70對(duì)—黃灰 41對(duì)—紫蘭47對(duì)—紫桔43對(duì)—紫綠49對(duì)—紫棕70對(duì)—紫灰 (注意:用“白綠”標(biāo)識(shí)線纏著) 52對(duì)—白蘭52對(duì)—白桔52對(duì)—白綠79對(duì)—白棕80對(duì)—白灰 71對(duì)—紅蘭72對(duì)—紅桔78對(duì)—紅綠34對(duì)—紅棕35紅灰 69對(duì)—黑蘭78對(duì)—黑桔78對(duì)—黑綠79對(duì)—黑棕70對(duì)—黑灰 41對(duì)—黃蘭42對(duì)—黃桔43對(duì)—黃綠69對(duì)—黃棕70對(duì)—黃灰 41對(duì)—紫蘭47對(duì)—紫桔43對(duì)—紫綠49對(duì)—紫棕50對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79對(duì)—白棕80對(duì)—白灰 81對(duì)—紅蘭81對(duì)—紅桔78對(duì)—紅綠79紅棕70對(duì)—紅灰 81對(duì)—黑蘭67對(duì)—黑桔78對(duì)—黑綠79黑棕70對(duì)—黑灰 41對(duì)—黃蘭67對(duì)—黃桔68對(duì)—黃綠69對(duì)—黃棕70對(duì)—黃灰 71對(duì)—紫蘭72對(duì)—紫桔73對(duì)—紫綠74對(duì)—紫棕70對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79對(duì)—白棕80對(duì)—白灰 81對(duì)—紅蘭81對(duì)—紅桔78對(duì)—紅綠79紅棕70對(duì)—紅灰 81對(duì)—黑蘭81對(duì)—黑桔78對(duì)—黑綠79黑棕70對(duì)—黑灰 41對(duì)—黃蘭67對(duì)—黃桔68對(duì)—黃綠69對(duì)—黃棕70對(duì)—黃灰 41對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79對(duì)—白棕80對(duì)—白灰 81對(duì)—紅蘭78對(duì)—紅桔78對(duì)—紅綠79紅棕70對(duì)—紅灰 81對(duì)—黑蘭81對(duì)—黑桔78對(duì)—黑綠79紅棕70對(duì)—黑灰 81對(duì)—黃蘭81對(duì)—黃綠67對(duì)—黃棕70對(duì)—黃灰 81對(duì)—紫蘭72對(duì)—紫桔73對(duì)—紫綠74對(duì)—紫棕70對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭77對(duì)—白桔78對(duì)—白綠79對(duì)—白棕80對(duì)—白灰 81對(duì)—紅蘭78對(duì)—紅桔78對(duì)—紅綠79紅棕70對(duì)—紅灰 81對(duì)—黑蘭81對(duì)—黑桔78對(duì)—黑綠79黑棕70對(duì)—黑灰 41對(duì)—黃蘭81對(duì)—黃桔81對(duì)—黃綠69對(duì)—黃棕70對(duì)—黃灰 71對(duì)—紫蘭72對(duì)—紫桔73對(duì)—紫綠74對(duì)—紫棕70對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 76對(duì)—白蘭81對(duì)—白桔78對(duì)—白綠79對(duì)—白棕70對(duì)—白灰 81對(duì)—紅蘭81對(duì)—紅桔78對(duì)—紅綠79紅棕70對(duì)—紅灰 81對(duì)—黑蘭81對(duì)—黑桔81對(duì)—黑綠64對(duì)—黑棕70對(duì)—黑灰 81對(duì)—黃蘭220對(duì)—黃綠67對(duì)—黃棕70對(duì)—黃灰 81對(duì)—紫蘭67對(duì)—紫桔73對(duì)—紫綠74對(duì)—紫棕70對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 81對(duì)—白蘭81對(duì)—白桔78對(duì)—白綠79對(duì)—白棕80對(duì)—白灰 81對(duì)—紅蘭81對(duì)—紅桔81對(duì)—紅綠79紅棕70對(duì)—紅灰 81對(duì)—黑灰81對(duì)—黑蘭81對(duì)—黑桔81對(duì)—黑綠81對(duì)—黃棕70對(duì)—紫灰81對(duì)—紫灰81對(duì)—紫蘭81對(duì)—紫桔81對(duì)—紫綠81對(duì)—紫棕70對(duì)—紫灰 (注意:用“白棕”標(biāo)識(shí)線纏著) 81對(duì)—白蘭81對(duì)—白桔81對(duì)—白綠81對(duì)—白棕80對(duì)—白灰81對(duì)—紅灰81對(duì)—紅灰81對(duì)—紅灰81對(duì)—紅灰81對(duì)—紅灰81對(duì)—紅灰81對(duì)—紅灰81對(duì)—紅灰81對(duì)—黑81對(duì)—黑81對(duì)—黑81對(duì)—黑81對(duì)—黑81對(duì)—黑81對(duì)—黑81對(duì)—紅81對(duì)—黑81對(duì)—紅81對(duì)—黑81對(duì)—綠81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫81對(duì)—紫電纜。

MHYAV礦用通信電纜5020.80.8=2383.25芯。2芯是銅線,3芯是聚乙烯絕緣,1芯是聚氯乙烯護(hù)套。50是42芯,2.4是就是電纜直徑是50平方。MHYV22-550+125電纜近似外徑約:28mm。250+225電纜近似外徑約:32mm。礦用電纜都是說(shuō)礦物電纜,因?yàn)檫@種電纜的絕緣是聚氯乙烯,他們?cè)诘V用,可以埋入地下,為好安全,所以被廣泛的運(yùn)用。MHYAV22-150電纜約為350電纜,由3根導(dǎo)電芯線和一根地線組成,另外一根是保護(hù)接地線。350+225是一種常用的電纜,它的外徑為22毫米,它的規(guī)格是350+225,它的外徑為41毫米。電纜的規(guī)格都是按照截面積,大概分為1.5平方的,2.5平方的,4平方和6平方等等,還有很多規(guī)格。礦用電纜的使用要求:1、電纜的額定電壓用U0/U(Um)表示:3/U(Um) 0.6/1(1.2)kV。2、電纜導(dǎo)體的長(zhǎng)期允許工作溫度應(yīng)不超過(guò)60°C。3、電纜的敷設(shè)溫度應(yīng)不低于0°C。4、電纜允許彎曲半徑:三芯電纜不小于電纜外徑15倍。50平方電纜:額定電壓Uo/U:0.6/1kV。

礦用電纜和普通電纜的表示應(yīng)不小于:S 為電纜外徑。M:絕緣材料,實(shí)心聚烯烴(或聚烯烴)。

電纜用39(3956)不銹鋼。有關(guān)電纜與型號(hào)的問(wèn)題,如:VV、YJV、YJLV等等。

12對(duì)雙絞線，每對(duì)線由2芯組成，每芯的導(dǎo)體截面為1.5mm2 通常情況下，這種電纜用于傳輸差分信號(hào)。

銅芯雙芯50平方VV22電纜1米銅重量是890g。銅的密度是8.9，則2x50x8.9x1=890g。

YCW-3x50平方銅芯電纜的直徑是13.82毫米。根據(jù)圓面積公式S=πr2，S為150，r為半徑，則r=√(150/3.14)，直徑等于13.82毫米。

J-Y(ST)YH 2*2*0.8總線控制電纜被用于在特殊建筑的工程系統(tǒng)中傳輸 bus 信號(hào)，也在過(guò)程控制系統(tǒng)中被用作測(cè)量和控制電纜。

251芯50平方銅芯電纜空氣中敷設(shè)的安全電流是191A。

1x50平方銅芯YC電纜的直徑是7.98mm。根據(jù)圓面積公式S=πr2，S為50，r為半徑，則r=√(50/3.14)，直徑等于7.98mm。

該電纜全稱表示為：K：控制電纜YJ：電纜絕緣材料是交聯(lián)聚乙烯V：電纜的護(hù)套材料采用聚氯乙烯護(hù)套料P：電纜總屏蔽材料采用是銅絲編織屏蔽5*2*1.5表示電纜是由5組線對(duì)，每組線對(duì)有2根1.5mm2絕緣線芯對(duì)絞組成。

銅芯一芯50平方ZR-YJV電纜安全載流量表：

型號(hào)	材質(zhì)	載流量
ZR-YJV一芯50平方	銅	311

MHYV——煤礦用通信電纜 5*2*7/0.37——由5對(duì)雙絞線組成，每對(duì)2芯，每芯由7股直徑為0.37mm的銅絲構(gòu)成。

MH——煤礦用通信電纜 Y——聚乙烯絕緣 V——聚氯乙烯護(hù)套 5X2X7/0.37——表示5對(duì)雙絞線，每對(duì)是由2芯絕緣線構(gòu)成，每根絕緣單線的導(dǎo)體是由7股直徑0.37mm的銅絲構(gòu)成。2x2x7/0.43——表示2對(duì)雙絞線，每對(duì)是由2芯絕緣線構(gòu)成，每根絕緣單線的導(dǎo)體是由7股直徑0.43mm的銅絲構(gòu)成。

通信光纜不會(huì)自燃。自燃是指可燃物在空氣中沒(méi)有外來(lái)火源的作用，靠自熱或外熱而發(fā)生燃燒的現(xiàn)象。通信光纜是一定數(shù)量的光纖按照一定方式組成纜心，外包有護(hù)套，有的還包覆外護(hù)層，用以實(shí)現(xiàn)光信號(hào)傳輸?shù)囊环N通信線路 即：由光纖（光傳輸載體）經(jīng)過(guò)一定的工藝而形成的線纜。光纜的基本結(jié)構(gòu)一般是由纜芯、加強(qiáng)鋼絲、填充物和護(hù)套等幾部分組成，另外根據(jù)需要還有防水層、緩沖層、絕緣金屬導(dǎo)線等構(gòu)件。光纜外皮的硬塑如果被明火長(zhǎng)期灼燒，會(huì)著火，正常情況不可能自燃。

YCW四芯50平方銅芯電纜承載電流表：

芯數(shù)	四
平方	50
型號(hào)	YCW
載流量	140
材質(zhì)	銅
電壓等級(jí)	450/750v
溫度	40℃

MHYV通信電纜一般為450/750V 根據(jù)MT167-87第3.3.5條規(guī)定。線芯之間，線芯與屏蔽層之間，交流50HZ，1500V耐壓1分鐘不擊穿或閃絡(luò)為合格 擴(kuò)展知識(shí)：礦用通信電纜mhyv，具有適用于礦井環(huán)境的機(jī)械強(qiáng)度、耐潮、防靜電和阻燃等性能的礦井專(zhuān)用通信電纜。

「通過(guò)普通電線進(jìn)行數(shù)據(jù)通信的技術(shù)」電力線通信（Power Line Communication，英文簡(jiǎn)稱PLC）技術(shù)是指利用電力線傳輸數(shù)據(jù)和媒體信號(hào)的一種通信方式。該技術(shù)是把載有信息的高頻加載于電流，然后用電線傳輸接受信息的適配器，再把高頻從電流中分離出來(lái)，并傳送到計(jì)算機(jī)或電話以實(shí)現(xiàn)信息傳遞。電力線通信的基本原理是：在發(fā)送時(shí)，利用調(diào)制技術(shù)將用戶數(shù)據(jù)進(jìn)行調(diào)制，把載有信息的高頻加載于電流，然后在電力線上進(jìn)行傳輸；在接收端，先經(jīng)過(guò)濾波器將調(diào)制信號(hào)取出，再經(jīng)過(guò)解調(diào)，就可得到原通信信號(hào)，并傳送到計(jì)算機(jī)或電話，以實(shí)現(xiàn)信息傳遞。PLC設(shè)備分局端和調(diào)制解調(diào)器，局端負(fù)責(zé)與內(nèi)部PLC調(diào)制解調(diào)器的通信和與外部網(wǎng)絡(luò)的連接。在通信時(shí)，來(lái)自用戶的數(shù)據(jù)進(jìn)入調(diào)制解調(diào)器調(diào)制后，通過(guò)用戶的配電線路傳輸?shù)骄侄嗽O(shè)備，局端將信號(hào)解調(diào)出來(lái)，再轉(zhuǎn)到外部的Internet。具體的電力線載波雙向傳輸模塊的設(shè)計(jì)思想：由調(diào)制器、振蕩器、功放、T/R轉(zhuǎn)向開(kāi)關(guān)、耦合電路和解調(diào)器等部分組成的傳輸模塊，其中振蕩器是為調(diào)制器提供一個(gè)載波信號(hào)。在發(fā)射數(shù)據(jù)時(shí)，待發(fā)信號(hào)從TXD端發(fā)出后，經(jīng)調(diào)制器進(jìn)行調(diào)制，然后將已調(diào)信號(hào)送到功放級(jí)進(jìn)行放大，再經(jīng)過(guò) T/R轉(zhuǎn)向開(kāi)關(guān)和耦合電路把已調(diào)信號(hào)加載到電力線上。接收數(shù)據(jù)時(shí)，發(fā)射模塊發(fā)送出的已調(diào)信號(hào)通過(guò)耦合電路和T/R 轉(zhuǎn)向開(kāi)關(guān)進(jìn)入解調(diào)器，經(jīng)解調(diào)器解調(diào)后提取原始信號(hào)，并將原始信號(hào)從RXD 端送到下一級(jí)的數(shù)字設(shè)備中。

電纜卷筒纏線一般按螺旋線方式緊密纏繞排列了，纏繞到卷筒端返回仍舊按螺旋線反方向排列了。有的卷筒帶纏繞導(dǎo)位裝置了，也可以不設(shè)導(dǎo)位裝置了。

纏繞線速度一定，卷筒速度內(nèi)圈較快，外圈較慢。要求被纏繞電纜線有一定的拉力便于纏繞。

銅芯YJV 3芯50平方電纜安全電流是204A。

RS485是半雙工通信，不能同時(shí)收/發(fā)，收/發(fā)時(shí)需要切換。A B是兩條通信線的接線端，通常標(biāo)有A+，B，是指電平的高低，并不是正負(fù)電壓的意思。多個(gè)RS485設(shè)備的A B要對(duì)應(yīng)接上，即A對(duì)A，B對(duì)B的接。