1. Mine control cable execution: mt818-1999? 2. Mine flame retardant control cables: this product is applicable to ac rated voltage u0/u of 450/750v. And the following control and control circuits and the protection lines and the connection lines of the electrical instruments in the distribution equipment. ? 3. Model specifications and scope of mine control cables:? Model of control cable for mine? Specification range? Using MKVV MKVVP, MKVVP2? 0.5 - was 10, 2-61 core? Suitable for weak current control or strong electromagnetic field area mkvvvv22, mkvvvvv20? 0.5 - was 10, 4-61 core? MKVV32, MKVV30? 0.5 - was 10, 7-61 core? MKVVR? 0.5-6 was, 2-61 core? MKVVRP? Was 0.5-4, 2-61 core? MKVVP22 MKVVP2-22? 1.5 - was 10, 4-61 core? MKVVP2-22-1? 1.5 - was 10, 4-61 core? Mainly used in 500KV substation and power plant distribution device and high electromagnetic field area mkvv-1, mkvvvvv22-1? 0.5 - was 10, 2-61 core? 4, using features: coal mine with control cable conductor long-term allowed working temperature is 70 ℃, the cable temperature under installation should not below 0 ℃. Permissible bending radius of control cables used in coal mines: for cables with armored or copper band shielding structures, the bending radius should not be less than 12 times of the outer diameter of the cables. For soft cable with shield layer structure, it should be no less than 6 times the outer diameter of the cable. The cable without armor layer should not be less than 6 times the outer diameter of the cable. ?
HYA22：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢带铠装聚氯乙烯护套市内通信电缆。HYA23：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢带铠装聚乙烯护套市内通信电缆。HYAT22：铜芯实心聚烯烃绝缘填充式挡潮层聚乙烯护套钢带铠装聚氯乙烯护套市内通信电缆。
二、耐火电缆耐火电缆用途：本产品适用于高层建筑、油田、电站、电厂、矿山、化工、矿井、地铁等要求防火条件较高的高的场合，也是应急电源、消防泵、电梯通讯信号系统的应备电缆；该产品具有阻燃耐火电缆耐火能力，在经受火焰直接燃烧情况下，在一定时间内（不小于3h）不发生短路和断路故障，确保继续供电以维持照明和传。
因此，耐火系列电力电缆的整体性能优良可靠。 防火电缆的阻水性能符合IEC502-2规定。VV32VLV32VV33VLV33VV42VLV42VV43VLV43聚氯乙烯绝缘聚氯乙烯/聚乙烯护套钢丝铠装电力电缆敷设在高落差地区，电缆能承受机械外力作用及相当的拉力。
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
人和设备都在地球这个等电位体上生活工作和运行，需要保护他们的安全，只要是等电位的地方，就不会电到人，所以专家们想出一个方法，就是把这些用电设备接地了，或者把那条中性线接地了，这样让它他们和大地等电位，就不会威胁到人的安全了。所以就出来一条地线了，只要深入在大地上打一个够深的洞，把那条中线性线接地了，这样人触摸到中性线，也是安全的，因为它和大地等电势。另外从布线角度来看，这样节省了一条布线，省和很多钱和很多资源，所以就把这条中性线接地了。
全塑市话电缆|全塑市话电缆,通信电缆型号,配线电缆,局用电缆,铠装通信电缆,钢丝铠装通信电缆,钢丝铠装通信电缆,市内通信电缆。通信电缆型号HYAHYACHYATHPVVHYVHJVVHYY。配线电缆型号HPVVZR-HPVV。
综合纽绞铁路信号电缆执行标准GB/T。室外信号电缆PZYA234CC铁路信号电缆适用于额定电压交流500V或直流1000V及以下传输铁路控制信号、音频信号或某些自动装置用固定敷设的各种电缆。 4、使用特性：电缆在-40℃-+50℃环境下使用。
3、产品标准：GB9330.2-88《聚氯乙烯绝缘和护套控制电缆》4、电缆型号、名称及使用范围型号名称截面mm2芯数主要用途ZR-KVV铜芯阻燃聚氯乙烯绝缘阻燃聚氯乙烯护套控制电缆0.75～62-61敷设在室内、电缆沟管道固定场合ZR-KVVP铜芯阻燃聚氯乙烯绝缘阻燃聚氯乙烯护套编。
Integrated stranded railway cable GB/ t2476-1993. Railway cables are suitable for transmission under rated voltage ac 500V or dc 1000V and below. Product name, model, specification and scope: plastic insulation and polyurethane sheath railway cable PTYAH; PTYA; PZYA; PTYV; PTYY,; PTY22; PTY23; (PZY02; PZY03; PZY23 PZY22) 1/0.8mm (1/1.0mm) 2-48 core is suitable for railway communication, fire alarm, telegraph and other automatic devices with rated voltage ac 500V or dc 1000V or below.
产品用途：安全防范产品配套传输线缆、停车场监视电缆、三表远程控制线缆、电子线、通信电缆、火灾报警探测设备传输线缆、摄像头连接用视频线电源线信号线、成套电气配电柜连接用电线电缆。、学校教学设备传输电线电缆、智能数码保安监控系统线缆、电子机房工程电缆、闭路电视监控系统线缆、图像网络传输系统线缆、背景音乐系统线缆。
产品在全国几十个煤业集团及矿山上使用，获得了较高的评价和赞誉。（包括农村电话局用）电缆适用温度为-10℃～50℃，电缆安装时的环境温度不低于0℃。弯曲半径不小于电缆直径的10倍。全聚氯乙烯局用电缆制造标准：Q/TY一．适用范围：本产品用于配线架至交换机或交换机内部各级机器间之连接。
为了大家有一个好的学习方法，能在最快最短的时间内学会掌握plc的应用，特此为初学PLC的同学编写了一份学习PLC的流程和方法，教大家如何学习PLC，希望对大家有所帮助，这是某个学员学习时候的一些学习方法及感悟，特此分享给大家。当然，这只是我自己的观点，大家如有什么好的建议，也希望同学们能向我积极提出来，我们共同讨论学习和进步。第一：掌握西门子硬件的结构及各部分的一个功能，熟悉PLC的硬件接线，：开关量输入输出的接线，模拟量输入输出的接线。
天津市电缆总厂第一分厂专业生产矿用通信电缆；矿用控制电缆；矿用信号电缆；矿用防爆电话线；矿用防爆通信电缆，矿用信号电缆；矿用通讯电缆；矿用电话电缆；矿井用通信电缆；矿井用信号电缆；矿井用控制电缆；矿用监测电缆；矿用监控电缆；矿用防爆电缆；矿用阻燃电缆；MHYV；MHYAV；MHYA32型矿用通信电缆。
电焊机电缆本产品适用于二次侧对地电压交流不超过200V和脉动直流峰值400V电焊机用二次侧接线及连接电焊钳用。在一定条件下，也可用于传输2048kbit/s及以上的数字信号。HYA、HYAT用于架空、管道敷设。
在一定条件下，也可用于传输2048kbit/s以上的数字信号。适用于矿山、电厂、市内、近郊及局部地区。特别适用于500KV及以下的发电厂，变电站控制线路。采用塑料绝缘特种屏蔽控制电缆可抑制外界电、磁场的干扰。
DJYPVR 聚乙烯绝缘铜丝编织分屏蔽聚氯乙烯护套软结构电子计算机用电缆。DJYVPR 聚乙烯绝缘铜丝编织总屏蔽聚氯乙烯护套软结构电子计算机用电缆。DJYPVPR 聚乙烯绝缘铜丝编织分屏蔽、总屏蔽聚氯乙烯护套软结构电子计算机用电缆。