一些常见问题:(希望各位买家能花上几分钟时间认真阅读)1.电线一扎长度:100米,正负误差2-3米;2.电线型号:BV单股,BVR多股,BVV双胶单股,BVVR双胶多股;3.电线常用规格:1平方/1.5平方/2.5平方/4平方/6平方/10平方等;区别:BV为单股线,BVR为多股,BVR比BV贵5%。
???? In flame retardant series products, has been successfully used in the oxygen isolation technology, not only 0.6/1 kv polyvinyl chloride insulated and crosslinked polyethylene insulation flame retardant power cable can achieve GB/T12666.5 "into A bunch of power cable test" in class A, and rated voltage up to and including 6/10 kv 8.7/15 kv crosslinked poly (flame retardant power cable can reach A high class A demand and A large margin. On the basis of high flame retardant and high flame retardant cross-linked insulation, a low-smoke halogen-free high-flame retardant oxygen insulation layer power cable was added, and its low-smoke halogen-free performance was in line with GB/T17651.1.2 and GB/ t In this way, the overall level of the company's cross-linked power cable is lower than the domestic status. This company produces the type refractory power cables for rated voltage 0.6/1 kv copper core cable, can also produce low smoke zero halogen fire-resistant power cable, high flame retardant fire-resistant power cable oxygen insulation layer, the fire-resistant performance in line with the GB/T12666.6 cable fire resistance test. Therefore, the overall performance of refractory series power cables is good and reliable. The water resistance performance of fireproof cable conforms to iec 502-2.
ZRCHYAT铜芯实心阻燃聚烯烃绝缘填充式挡潮层聚乙烯护套双层纵包轧纹钢带铠装聚乙烯套市内通信电缆市内通信电缆用途：主要用于传输音频、150kHZ及以下的模拟信号和2048kbit/s及以下的数字信号。
例如：额定电压600/1000V交联聚乙烯绝缘聚稀烃护套阻燃B类低烟无卤电缆，3芯，240mm2，表示为WDZB-YJY600//TEC16.额定电压600/1000V交联聚乙烯绝缘聚稀烃护套阻燃B类耐火低烟无卤电缆，3芯，240mm2，表示为WDZBN-YJY600/1000。
芯线数：2—5芯，7—36芯（CCC目录外产品，无CCC认证）。
截面积：0.75-2.5mm²，0.5、2.5—35mm²（CCC目录外产品，无CCC认证）。
测试电压：2000V，5min。
仪表工作电源的选用优先选用交流220伏，尽量不选择交流380伏。
温度仪表的安装1.仪表工作环境不要超过50度，尽量远离热源，相对湿度不超过85％，无腐蚀性气体。
不要把仪表安装在振动太大的地方，以免影响其寿命。
仪表应安装在操作和读数方便的位置。
大部分仪表无电源开关和保险丝，应根据情况加装。
仪表输入信号线与仪表电源线、负载控制线不要捆扎在一起，更不能放在同一根金属管内，以免电磁波干扰。
热电偶输入，应使用对应的补偿导线。
IA-DJVVPRIA-DJYVPRIA-DJYJVPR本安型、编织总屏蔽（铜丝或镀锡丝）软结构。
IA-DJVVP2RIA-DJYVP2RIA-DJYJVP2R本安型、铜塑复合膜总屏蔽软结构。
IA-DJVVP3RIA-DJYVP3RIA-DJYJVP3R本安型、铝塑复合膜总屏蔽软结构。
In addition, once the hydrogen halide gas reacts with the water in the air, it will generate "hydrogen halide acid", which will seriously corrode e and buildings and cause "secondary disasters".
耐高温仪表电缆用途：本产品适用于仪表、仪器及其它电器设备中的信号传输及控制线路。
使用特性：电缆的交流额定电压1000V以下，电缆线芯的长期工作温度应不超过250℃。
电缆允许弯曲关径应不小于电缆外径的6倍，敷设温度应不低于0℃。
MKVV(2-14)*(4-6)mm2 ,(2-10)*10mm2 (2-61)*(0.75-2.5)mm2 MKVV*(0.75-1.5)mm2 (4-61)*2.5mm2 (4-14)*(4-6)mm2 MKVVP(7-61)*(0.75-1.5)mm2 (4-61)*2.5mm2 (4-14)。
Any kind of laying can be adopted, which is more suitable for laying in rock area. HYA23 double metal clad double sheath communication cable HYAT series oil filled telecommunication cable (HYAT HYAT23, HYAT53: HYAT23 100 x2x0. Details of the 4: multi-cores iron cable HYAT23 HYA23 200 x2x0. 4 big logarithmic armoured cable HYAT23 logarithmic galvanized steel cable.
耐火机理在矿用电缆的绝缘和护套材料中加入某种添加剂，降低聚合物产生的热量，防止聚合物分解或促进绝缘和护套材料炭化形成保护层；在线芯处增加一层云母玻璃丝带等无机绝缘材料，在绝缘和护套层被火燃蚀后，*缠包在导体上的云母耐火带保护而继续通电，从而在着火时保持一定时间的正常运行。
中间继电器和接触器的差异继电器之冠上了“中间”两个字，可以理解成它并不是用来实现最终控制的，而是起到一个中间环节的转接作用，“继”就是继接状态的意思了。
中间继电器并没有所谓的主触点和辅助触点的说法，它的目标是让小电流变成稍微大一点的电流，甚至还继续保留原来的小电流，而只利用了触点的隔离功能。
从这个角度而言，继电器会设计很多组常开和常闭触点，触点越多，能用来联锁其他继电器或者接触器的可能性会越高，逻辑的花样会越复杂，越能满足工业控制需求。
具有较高的熔融温度，适宜的粘度和良好的低温韧性；热稳定性和抗水性优异；电绝缘性能强、损耗小，与电缆内外护套的相容性好，是一种优良的加热应用型电缆填充复合物。
综合布线、安防工程、监控工程、弱电系统工程、银行监控、网络工程、音响工程、远程三表抄送、消防工程、楼宇防盗监控、门禁可视对讲等专用、音、视频电线电缆。
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!
Main transmission cable MHYVP 2 * 2 * 2 * 7/0.52 performance: 1. + 20 ℃ dc resistance wire 7/0.28 or less 45 Ω 1/0.8 / Km 36.7 or less Ω/Km, 2. + 20 ℃ wire insulation resistance 3000 M or more Ω. Km3. The line capacitance (800 ~ 1000 hz) to work or less 0.06 uF/km4. The far end crosstalk attenuation (800 ~ 1000 hz) or 70 dB/km5. Inductance (800 ~ 1000 hz) 800 or less mH/km6 resistance ac power frequency voltage 1.5 KV / 403 to the characteristics of the main transmission cables MHYVP 2 x 2 x 7/0.52 by: Mhy MT8 1/0.8 (20 30 x 2 x 2 x 2) 50 x 0.8 coal mine with insulating aluminum bonding layer of PVC sheathed communication cable used in deviated well and drift MHYV (1 1 x 2 x 2 x 2, 4, 5 x 2) x 7/0.28 coal mine by polyethylene insulated PVC sheathed communication cable for mine roadway inclined lane and electromechanical cavern MHJYV 4/0.28 wire + 3/0.28 steel wire 1 2 x 2 x 2 coal mine with strengthening core polyethylene insulated PVC sheathed mining communications cables used for mechanical damage is higher level and inclined lane MHYA32 (30 x 2, 50 x 2, 80 x 2) x 402 coal mine e introduction mining communication cable: purpose: this product is used for underground telephone communication welding line, distribution line and user line. Conditions of use: cable temperature - 40 ℃ ~ + 50; At 25 ℃ when the humidity is 95%; Cable laying temperature - 10 ℃ or higher; The bending radius of MHYV for cable laying is 10 or greater
从双绞线抑制干扰的原理可以看出，每对线进行双绞的目的是为了抑制干扰信号，提高传输质量；我们在制作双绞线的接头时，一定不要将传输差分信号的一对线分开，否则将大大影响网络的传输质量。
6、有屏蔽结构的软电缆，应不小于电缆外径的6倍。