5、型号:MHYAV、MHYA32、MHYV、MHYVR、MHYVRP、MHYVP、MHY32、MHJYV6、产品说明:型号名称MHYV煤矿用聚乙烯绝缘聚氯乙烯护套通信电缆MHYVR煤矿用聚乙烯绝缘聚氯乙烯护套通信软电缆MHYVP煤矿用聚乙烯绝缘编织屏蔽聚氯乙烯护套通信电缆MHYVRP煤矿用聚乙烯绝。
Purpose: the self-supporting non-filled cable is suitable for the urban and township telecommunication lines of local telecommunication network, and also for the special network lines connecting to the public network. It is economical and practical to use the same outer protective layer for hoisting line and cable. The mechanical and electrical properties of the cable remain unchanged under conditions of 30~C - 60~C. Structure: wire: annealed bare copper wire, copper wire diameter is 0. 4, 0. 50, 0. 60, 0. 70, 0. 80, 0. 90 mm. Insulating material: high density polyethylene or ethylene-propylene copolymer. The color of the insulated wire is in accordance with the full chromatographic standard. Pair of insulated wires: two different colored insulated wires are twisted in pairs according to different pitch and are identified by a specified chromatographic combination. Core structure: with 25 pairs as the basic unit, more than 25 pairs of cables are assembled according to the unit, each unit is wired with the unit of specified chromatogram to identify different units. 100 pairs or more of cables plus 1% of the reserve pair. Core tape: wrap with a polygrease film tape. Shielding: the two sides are overlapped with or without corrugated metal strip, beyond the cable core of the longitudinal capsule. The plastic film coated on the surface of the shielding belt and the bonding sheath of the protective layer: black low density polyethylene. Hoisting line: the hoisting line is 7 strands of galvanized steel strand, nominal outside diameter is 6. 3 and 4 mm. The tensile strength of two types of 75mm is not less than 3000kg and 1800kg respectively. The suspension wire is coated with thermoplastic paint to prevent the steel wire from corrosion. Identification and length marking
产品标准GB参照IEC227标准电缆通过IEC332-3《电线电缆成束燃烧试验》,其中ZRC型电缆通过IEC332-3C类成束燃烧试验(C类即应使可燃材料总体积为1.5L/M,火焰持续燃烧时间为20min);ZRA型电缆通过IEC332-3A类成束燃烧试验(试样应可燃材料总体积为7L/M,火焰持续燃。
二、执行标准MT/TQ/TY《煤矿用阻燃射频同轴电缆》。适用于室内、管道及一般工业环境。使用时,屏蔽层一端接地。普通双绞屏蔽型电缆STP-120Ω(forRS485&CAN)onepair18AWG,电缆外径8.2mm左右。

国标GB4706.1-1992/1998规定的电线负载电流值(部分)1平方铜芯线允许长期负载电流为:6A---8A1.5平方铜芯线允许长期负载电流为:8A---15A2.5平方铜芯线允许长期负载电流为:16A---25A4平方铜芯线允许长期负载电流为:25A---32A6平方铜芯线允许长期负载电流为。
plc编程入门必知:点动/连动的电动机启动停止控制程序控制要求有些设备运动部件的位置常常需要进行调整,这就要用到具有点动调整的功能。PLC的I/O配置、梯形图及时序图PLCI/O配置梯形图时序.电路工作过程点动按下点动按钮,I0.3常开点闭合,Q0.0得电,电动机启动运行,但常闭点I0.3断开,即断开接触器KM的自锁回路,因此松开点动按钮时,Q0.0失电,电动机停止运行。连动当按下连动按钮时,常开点I0.1闭合,Q0.0Q得电并进行自锁,当按下停止按钮时,Q0.0失电,电动机停止运行。
2.绝缘颜色:3.3线芯为一根红色一根蓝色,0.85线芯为一根白色一根绿色,白色线芯外绕包一层铝箔。3.绝缘厚度:3.3线芯绝缘厚度为0.5,绝缘后外径为3.5毫米。0.85线芯绝缘厚度为0.7绝缘后外径为2.5毫米。
铁路信号电缆直径-外径产品特点:本产品适用于额定电压交流500V或直流1000V及以下传输铁路信号、音频信号或自动信号装置的控制电路,其中综合护套、铝护套铁路信号电缆具有一定的屏蔽性能,适宜于电气化区段或其它有强电干扰的地区敷设。
4、6、8、9、12、14、16、19、21、24、28、30、33、37、42、44、48、52、56、61PTYY聚乙烯绝缘聚乙烯护套铁路信号电缆PTY22聚乙烯绝缘钢带铠装聚氯乙烯外护套铁路信号电缆敷设在土壤、槽、管中,能承受较大的机械外力PTY23聚乙烯绝缘钢带铠装聚乙烯外护。
YJV22交联聚乙烯绝缘钢带铠装聚氯乙烯护套电力电缆型号名称使用条件VV23聚氯乙烯绝缘钢带铠装聚乙烯护套电力电缆同VV22,YJV22YJV23交联聚乙烯绝缘钢带铠装聚乙烯护套电力电缆VV32聚氯乙烯绝缘细钢丝铠装聚氯乙烯护套电力电缆敷设在地下,竖井、水下,能承受较大拉力。

The sequence table of 200 pairs of communication cables (log-log cables) shows that there are 4 kinds of marking lines in 100 pairs of communication cables, and 25 pairs of marking lines are wrapped with the marking line of "bailan". The second 25 pairs are wrapped in "white orange" lines! The third 25 pairs are wrapped in "white and green" lines! The fourth 25 pairs are wrapped in "white brown" lines! The fifth 25 pairs are wrapped in a "white grey" logo line! The sixth 25 pairs are wrapped in a "red orchid" logo line! The seventh of the 25 pairs is wrapped in a red orange logo line! The eighth 25 pairs are wrapped in "red and green" lines! Manufacuring HYA; HYA22; HYA23; HYA53; ZRC - manufacuring HYA; ZRC - HYA53HYAT; HYAT23; HYAT53; HYAT22; HYYT; ZRC - HYAT; WDZ - HYAT; ZR - HYAT53; ;
扩音系统专用电缆型号AZVP HAVP HAVKAVP 扩音系统专用电缆型号规格大全AZVP HAVP HAV1、 HAVP 扩音对讲电缆;扩音系统专用电缆HAVP 2X32X0.15+2X48X0.22、 火灾报警系统专用电缆HAVP 2X32X0.15+2X48X0.23、 。
plc底层,实际就是单片机在运行,它只不过是基于单片机的基础,开发出来的一款二次应用的工业逻辑控制器,方便具有电工思维的用户来使用,所以PLC对比单片机的最大优势就是简单易用。PLC既然是基于单片机来开发的,PLC所有功能,单片机肯定可以都做到,比如一些计时,计数,中断,模拟量处理,通讯,逻辑控制,这些单片机都可以实现,而且响应速度上比PLC还要快很多,精度也会比PLC高。但是PLC使用了扫描周期来避免立刻刷新I/O端口状态,这点从软件而言,牺牲了速度,可靠性却强了很多,用户无论如何编程刷写程序,一般都不会发生死机等问题。
KVV22铜芯聚氯乙烯绝缘聚氯乙烯护套钢带铠装kvv22电缆450/7504-370.75-10敷设在室内,电缆沟、管道直埋等能承受较大机械外力的固定场合。KVVP阻燃铜芯聚氯乙烯绝缘聚氯乙烯护套kvvp电缆450/7504-370.75-10敷设在室内,电缆沟、管道等要求屏蔽的固定场合。

产品标准GB参照IEC227标准型号、名称及使用范围型号额定电压名称使用条件ZRA-KVVZRC-KVV450/750V0.6/1KV聚氯乙烯绝缘聚氯乙烯护套阻燃控制电缆要求阻燃固定敷设于室内、电缆沟、托架及管道中,或户外托架敷设ZRA-KVVPZRC-KVVP聚氯乙烯绝缘聚氯乙烯护。 。矿用控制电缆执行标准:MT2、矿用控制电缆用途:本产品适用于交流额定电压u0/u为450/750V及以下的控制监控回路及保护线路和配电装置中电器仪表的连接线。煤矿用控制电缆允许的弯曲半径:对有铠装或铜带屏蔽结构的电缆应不小于电缆外径的12倍。
Armoured oil filled telecommunication cable USES: armoured communication cable mechanical protective layer can be appended to the structure of cable, in order to increase the mechanical strength of the cable, improve the ability of anti erosion, is vulnerable to mechanical damage and vulnerable to erosion area of telephone cable designed. It can be laid in any way, more suitable for direct burial in rock areas.
2)导线截面:信号线0.8mm242/0.15。电源,地线2.5mm264/0.2。3)线对双绞:绞距£30mm。4)电缆全绞:绞距£200mm。5)绑束物:螺旋缠绕,25%重叠。6)电缆绝缘:PVC护套。