In manufacuring HYA communication cable, mine cable, mine communication cable, mine, mine communication cable, signal cable, mining control cable, cable for mine monitoring, mine monitoring cable, mine remote sensing cable, control cable, computer cable, flame retardant cable, fire-resistant cable, communication cable in the city, railway signal cable, communications e such as the power cord, communication cable in the city the main products are: Manufacuring HYA, HYAT, HYAC HYA22 HYA23, HYAT23, HYA53, HYAT53, ZRC - manufacuring HYA, ZRC - HYAT, WDZ - manufacuring HYA, ZRC - HYA23 series, such as product model complete specifications, has passed the holding center communication e network access license, constant standard symbol system certification, sold throughout the country telecommunications company, also become several communications e accessories, agreement is well received by customers and trust!
Flame-retardant cable classification: according to the different flame-retardant materials of cables, flame-retardant cables are divided into halogen flame-retardant cables and halogen-free low-smoke flame-retardant cables. Which contain halogen flame retardant cable insulation, sheath, outer sheath and auxiliary material (package belt and filling) in whole or in part by polyethylene (PVC) containing halogen flame retardant material, thus has good flame retardant properties. However, when the cable burns, a large amount of smoke and haloic acid gas will be released. Haloic acid gas is corrosive to the surrounding electrical e. When the cable burns, it will cause harm to the surrounding electrical e and rescue personnel, which is not conducive to the fire fighting and rescue work, thus causing serious "secondary hazards". All or part of the insulation layer, protective sleeve, outer protective layer and auxiliary materials (packing belt and filling) of the halogen-free low-smoke flame-retardant cable are adopted
信号电缆分为：铁路信号电缆，PVC绝缘信号电缆，控制信号电缆，矿用信号电缆铁路信号电缆用途：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。
Tianjin cable dragging branch factory manages a variety of "RVVP shielding cables", wholeheartedly provides you with perfect pre-sales, sales and after-sales services, and provides professional services such as "RVVP shielding cables" technology. Company and the major cities of Shanghai, Beijing, shenzhen, guangdong, jiangsu, zhejiang, shandong, sichuan, fujian, hubei, henan, liaoning, hebei, shanxi, hunan, anhui, tianjin, chongqing, guangxi, heilongjiang, jiangxi, shanxi, jilin, yunnan, and inner, gansu, guizhou, and other cities have a long term business, reasonable price, various brands of various types of import/domestic complete, strong after-sales service, let its tianlian cable bright again.
ZR-HYA23：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢带铠装阻燃聚乙烯护套市内通信电缆。
ZR-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阻燃聚氯乙烯护套市内通信电缆。
ZR-HYAT23：铜芯实心聚烯烃绝缘填充式挡潮层聚乙烯护套钢带铠装阻燃聚乙烯护套市内通信电缆。
如果电路的电阻为纯电阻的话，由此就可以推导出，此交流电的电压也是按照正弦数变化规律的，即e=UmaxSinωt。
如果将交流电的电压与电流相乘，就可以得到功率，即交流电的瞬时功率P=PmaxSinωt。
已经扯到了电压与功率上了，咱们现在还是回到交流电中的有效电流的问题上来吧。
交流电中的有效电流，通俗的说就是指交流电的额定电流。
关于它的定义，不只是有趣，甚至让人匪夷所思。
交流电的有效电流是这样定义的，往一个金属导体上通以交流电，经过时间t后，测量导体上热量的数值，等这个金属导体恢复室温后，再往这个金属导体上通以直流电，如果在相同的时间内，这个直流电在金属导体上产生的热量等于交流电在相同的时间内产生的热量的话，那么这个直流电的电流就是该交流电的有效值。
电缆结构：1）芯线:铜芯,聚氯乙烯绝缘护套。
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。
Product introduction - plastic insulated control cable | | KVV control cable KVVR control cable | | KVVP control cable shielding control cable KVVP | | KVVRP shielding control cable KVVP2 control cable | | KVVP2-22 control cable KVV22 sheathed control cable | control cable KVV | control cable KVVR | control cable KVVP | control cable KVVRP | control cable KVV22 product details: plastic insulated control cable: GB9330-88 scope of application: This product is fit for ac rated voltage up to and including 450/750 control, monitoring circuit and protection circuit using features: 1, the conductor long-term allowed working temperature is 70 ℃. 2, when laying environment temperature 0 ℃ or higher. 3. Minimum bending radius: 4. For unarmored cable, it shall be no less than 6 times the outer diameter of the cable. 5. The cable with armor or copper shield shall not be less than 12 times the outer diameter of the cable. 6. The soft cable with screen shielding structure shall not be less than 6 times the outer diameter of the cable.
敷设时电缆的温度应不低于0℃，敷设时弯曲半径应不小于电缆外径的10倍。
有铠装层或铜带屏蔽结构的电缆，应不小于电缆外径的12倍。
1、用途：本产品供交流额定电压500V或直流电压1000V及以下配电装置中电器，仪表接线之用。
电缆型号、名称、规格及用途型号名称规格用途MKYJV铜芯聚乙烯绝缘聚氯乙烯护套阻燃煤矿用控制电缆（2-14)**(0.75-2.5)铺设在室内、电缆内、管道等固定场合MKYJV22铜芯聚乙烯绝缘聚氯乙烯护套钢带锴装阻燃煤矿用交联控制电缆(7-61)*(0.75-。
电缆的推荐允许弯曲半径如下：无铠装电缆，应不低于电缆外径的6倍；铠装或铜带屏蔽电缆，应不低于电缆外径的12倍；屏蔽软电缆，不低于电缆外径的6倍。
控制电缆泛指设备仪表供电和信号控制。
代表型号：KVV和KYJV，还有其它控制线等等。
矿用电力电缆用途：本产品为煤矿用额定电压1KV及以下固定敷设用电缆，适用于煤矿井下的电力传输。
矿用电力电缆用途：本产品为煤矿用额定电压1KV及以下固定敷设用电缆，适用于煤矿井下的电力传输。
矿用电力电缆使用条件：线芯长期允许工作温度为65℃，电缆敷设温度不低于0℃，电缆允许最小弯曲半径为15（D+d）±5%。
也有可能从PLC或GOT将原有程序读回到个人计算机，进行修改和补充。
由此可以看出，**一项任务，PLC和GOT计算机，必须具备单独与个人计算机之间的通信能力。
在实际操作中，如果PLC和GOT已经被连接在一起（一般使用RS422接口的专用电缆），个人计算机与GOT已经可以通信时（早期一般使用RS232接口，现在大多使用更方便的USB接口的专用电缆），个人计算机与PLC之间的通信，可以自动地通过GOT间接地完成。
MHYVMHYVR1*2*7/煤矿用信号电缆的详细介绍矿用信号电缆型号：MHYV；MHYVR；MHYVRP；MHYVP；MHY32；MHYBV；MHJYV矿用信号电缆执行标准：MT818.矿用信号电缆用于作煤矿井下监测、控制系统中低频信号传输线。
产品名称型号规格及范围：塑料绝缘和聚氯乙烯护套铁路信号电缆信号电缆PTYA23PTYAH,;PTYA;PZYA;PTYV;PTYY,;PTY22;PTY23;（PZY02;PZY03;PZY23PZY22）1/0.8mm（1/1.0mm）2-48芯适用于额定电压交流500V或直流1000V及以下的铁。
6、有屏遮结构的软电缆，应不小于电缆外径的6倍。
综合纽绞铁路信号电缆执行标准GB/T。
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。
以此类推25对色标排列：白兰、白橙、白绿、白棕、白灰、红兰、红橙、红绿、红棕、红灰、黑兰、黑橙、黑绿、黑棕、黑灰、黄兰、黄橙、黄绿、黄棕、黄灰、紫兰、紫橙、紫绿、紫棕、紫灰全塑市话电缆缆芯采用全色谱线对。