天联牌MDJYVPR322X2X1.0电缆白云高要求SFF75-5耐高温射频同轴电缆倾国
屏蔽带表面涂敷的塑料薄膜与护层粘接自称是电缆护套:黑色低密度聚乙烯。自承式电缆吊线:吊线为7股镀锌钢纹线,标称外径为6.3mm和4.75mm两种,其抗张强度分别不小于3000kg和1800kg,吊线用热塑性涂料涂敷,以防钢丝锈蚀。
Telephone line -HPV HYV HPVV HVV HVV HVV 4*0.5 4*0.4 4*0.6 4*0.7 4*0.8 4*0.9 4*1.0 4*1.2 4*1.5 HPV HYV HPVV HVV HVV 4*0.5 4*0.4 4*0.4 *0.6 4*0.7 4*0.8 4*0.9 4*1.0 4*1.2 4*1.5 and other series of municipal communication cables: YD/Tmanufacuring hya HYAT duct (widely used in metropolitan area network, in the construction of communication network is given priority to with overhead and pipe installation, main transmission audio signal) HYAT filling type communication cable (used in metropolitan area network, in the construction of communication network is given priority to with pipe installation, have water-blocking effect, without charging protection, main transmission audio signal) HYAC messenger communication cable (used in metropolitan area network communication network construction, aerial installation, construction is convenient, Main transmission audio signal) HYAT53 filling type armoured cable (used in metropolitan area network communication network construction in complex environment, directly buried underground, water resistance, the rat bite, without charging protection, main transmission audio signal) the first branch factory of tianjin cable factory specializing in the production of research and development; Mining signal cables; Communications cables for coal mines; Coal mine control cables; Coal mine signal cables; Mining monitoring cables; Monitoring cables for mining; Telemetry cable for mine; Mine monitoring lines; Mine monitoring line; Mining telephone cables; Mine explosion-proof cable; Mining cables; Mine fire retardant cable; Sensor cable; All the products have the certificate of "coal safety sign" and have complete specifications. The products are widely used in various coal mine systems and coal mine monitoring systems. Sales to coal companies and mining groups throughout the country; And become a number of mining e companies supporting products, established long-term cooperation relations, products have been users praise and trust!
煤矿用阻燃通信电缆MHYVMHJYVMHYBVMHYA32MHYYVMHYY32煤矿用阻燃信号电缆:MHYVRMHYBVMHYV32MHYVRMHYVPMHYBVMHYVR32煤矿用阻燃控制电缆:MKVVMKVV22MKVV32MKVVRMKVVRP市内通信电缆:HYA22ZRC-HYAZRC-HY。
三:使用特性使用特性聚氯乙烯绝缘额定电压0.6/1导体最高工作温度70℃短路温度(持续最长5s)≤160℃敷设时环境温度≥0℃(低于0℃需预热)敷设时允许弯曲半径单芯电缆不小于电缆外径15倍多芯电缆不小于电缆外径10倍阻燃特性符合GB12666.5A或B(IEC332-3)四:基。
五:代号名称和含义表2项目代号说明阻燃特性ZR分A、B、C级阻燃系列代号K控制电缆绝缘材料F聚全氟乙丙烯(F46)最高工作温度200℃可溶性聚四氟乙烯(PFA)最高为260℃(型号前加ZR192)护套材料F聚全氟乙丙烯(F46)最高工作温度200℃可溶性聚四氟乙烯(PFA。
I=U*Iq/UNU下降后的电压UN额定电压Iq启动电流,一般情况下为额定电流的5~8倍方法一:直接向电机定子绕组通入低压三相交流电源,不需抽出电机转子,电机定转子同时干燥,现场实现方便,大电机所需电源容量较大,可能受现场条件限制;6kV电机现场一般通入380V电源进行干燥,如电机绝缘较低可采用转子堵转的方式进行干燥,如电机绝缘大于0.5Ω可以通入三相交流电后让电机转动起来进行干燥。方法二:电机三相绕组首尾串联(也可以一相反串,以减小电流),用于6个出线头的电动机;利用交直流电焊机或调压器调节电流通入电机定子绕组来干燥电动机,适用于现场电源容量不足时的高低压电动机干燥;接通、切断电焊机电流时应首先将电流调节到零,防止产生高电压损伤电机绝缘;现场处理不需抽出电机转子,实现方便。
2.电缆耐火防护电缆数量较少时,可用防火涂料、包带加于电缆上或把电缆穿于耐火管。同一通道中电缆较多时,宜敷设于耐火槽盒内,且对电力电缆宜用透气型式,在无易燃粉尘的环境可用半封闭式,敷设在桥架上的电缆防护区段不长时,也可采用阻火包。
二、电缆的型号、名称及使用范围型号名称使用范围ZR-DJYVP阻燃聚乙烯绝缘对绞组铜线编织总屏蔽阻燃聚氯乙烯护套计算机电缆固定敷设在室内、电缆沟或管道内ZR-DJYVP2阻燃聚乙烯绝缘对绞组铜带总屏蔽阻燃聚氯乙烯护套计算机电缆ZR-DJYVP3阻燃聚乙烯绝缘对绞铝塑复合带总屏蔽阻燃聚氯。
Computer cable sheath: one, the scope of application: this product is fit for ac rated voltage up to and including 300/500 v or 1000 v dc electronic computer network and automation control system of signal transmission, high anti-jamming performance re of the detection device and instrument connections. Second, implement standard SPTL/ three, use features: 1. The cable conductor of long term working temperature should be allowed no more than 70 ℃, in the process of using cable should prevent high temperature radiation or contact; Ambient temperature under installation should not below 0 ℃. 2. Allowable bending radius of cable laying and installation: non-armoured layer cables shall be no less than 6 times the outer diameter of the cable; The armoured or shielded cable shall not be less than 12 times the outer diameter of the cable. The soft cable of shield layer structure should not be less than 6 times the outer diameter of the cable.
电缆的运输和贮存: 电缆适用于水.陆.空一切运输工具,在运输储存过程中应注意:1. 防止水分侵入电缆;2. 防止严重弯曲及其他机械损伤;3. 防止高温及阳光下暴晒;电缆敷设过程中如人为造成质量事故等(如外护层损伤)应立即修复或通知本厂销售部。
。使用特性●工频额定电压U0/U为380/660V、660/1140V、1.9/3.3kv、3.6/6kv、6/10KV、8.7/10KV。●电缆导体的最高允许工作温度:65℃90℃●电缆允许最低的工作环境温度为-35℃●电缆弯曲半径:不大于电缆外径的6倍。
电缆型号、名称、规格及用途型号名称规格用途MKVV铜芯聚乙烯绝缘聚氯乙烯护套阻燃矿用控制电缆(2-14)**(0.75-2.5)铺设在室内、电缆内、管道等固定场合MKVV22铜芯聚乙烯绝缘聚氯乙烯护套钢带锴装阻燃煤矿用控制电缆(7-61)*(0.75-1.5)(。
使用外加电阻的驱动:步进电机的绕组使用粗导线时,线圈电阻Rw值很小,如下图所示。在各相线圈中,串联外部电阻R,为的是限制绕组流过的电流小于额定电流I。限制绕组流过电流的方法,可采用降低电源电压和串联外部电阻R的两种方法。假设步进电机的线圈电感为L,绕组电阻为Rw电气时间常数为τ,外加电阻R时,电气时间常数公式如下:外加电阻使时间常数τ变小,电流上升比较快,从而使步进电机的驱动脉冲频率变快,上图所示为无外部电阻与带外部电阻R的电流上升曲线的比较,t1时刻,没有电阻R时,电流只上升到I1,有电阻R时,电流上升到I2,使高速时的转矩得到很大的改善;缺点是铜耗增大。
主要技术性能:1)额定电压:交流50Hz,500V。3)绝缘电阻:20℃时,0.8mm2,³300MW/km;2.5mm2,?0MW/km。4)直流电阻:20℃时,0.8mm2,£26W/km;2.5mm2,£2.0W/km。
4.成缆时把四根线芯排列为红,绿,蓝,白,排流线,排流线要和线芯一起绞合,千万不要纵放,成缆时不要加填充物,缆芯外用铝箔绕包,而后再绕包一层聚酯膜,在外有一层铜丝编织屏蔽(屏蔽铜丝不镀锡)。5.护套:护前直径是8.2毫米,护后直径12毫米(11.7--12毫米之间),护套为阻燃蓝色护套。
0.5-1.5mm21-84对(3线组)用于电子控制装置、自动化系统、数字验检、计算机回路及其它一般工业计算机检测装置上。同轴电缆是专门设计用来传输视频信号的,其频率损失、图像失真、图像衰减的幅度都比较小,能很好的完成传送视频信号的任务。
阻燃型产品在型号前加“XX—",用阻燃“Z、ZR、ZA、ZB、ZC、ZRA、ZRB、ZRC、ZBN、ZCN、ZAN、ZN、ZRN",低烟低卤阻烟“ZL、ZD、",低烟无卤阻燃“ZW、ZDW、ZLW、ZWD、ZRD、ZRW",表示铠装型产品在产品的型号后下角加“—XX",用钢带铠装“22、29"、细钢。