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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。
PVV：聚氯乙烯绝缘聚氯乙烯护套信号电缆PYV：聚乙烯绝缘聚氯乙烯护套信号电缆PVV22：聚氯乙烯绝缘聚氯乙烯护套钢带铠装信号电缆PYV22：聚乙烯绝缘聚氯乙烯护套钢带铠装信号电缆软芯控制信号电缆：软芯控制信号电缆用途:适用于额定电压U0/U450/750V及以下控制、监视回路及保护线路的连接线，主。
用于以电子计算机为主的自动控制系统,尤其适用于计算机集散控制系统,传递生产装置过程变量的检测、控制、联锁、报警等模拟和数字信号。塑料绝缘和护套耐火电力电缆适用于大型建筑、石油、冶金、化工、电力、舰船等要求防火安全较高场合的动力装置连接。
Frequency converter cable symmetry design a: special cable for 1.8/3 kv and below frequency conversion motor, and symmetric 3 + 1 core and 4 core cable can only be used for the main power input cable, cable but good using symmetric structure. Inverter and variable frequency motor and cable must adopt symmetrical cable structure, symmetrical cable structure with three core and 3 + 3 core two kinds, 3 + 3 core cable structure is a small four to three core insulation wire core in the fourth core (neutral) is decomposed into three smaller insulation wire core section, the three big three symmetrical string cable core cable, special cable for 6/10 kv frequency conversion motor, the cable structure and 6/10 kv power cable, ordinary ordinary power cable is three insulation wire core adopts copper tape screened after cabling.
Flame retardant cable related:? The cables used in electrical equipment are used as the connection lines of electrical equipment, with internal wiring
型号中最后一个B（如果有的话），代表该电线为扁线——如果没有最后一个B，则代表该电线为圆线。扁线通常只有单芯，而圆线则更容易做成多芯线——同一个护套内有多根绝缘电线。家装型号推荐家装使用电线，一般分为明装和暗装两种，下面我分开来说：暗装——建议使用BV线或BVR线，两种电线用起来区别不大，但是BV线的价格会更低一些，因此着重推荐。BVV线和BVVR线也可以用于暗装，但是一来价格高，而来换线时必须一下换多根，很不方便，所以不推荐使用（使用护套线暗装，也需要穿管）。
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 method. 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.
Model of HYAP shielded communication cable; High frequency cable HYAPHYAPHYVPHYVPZRHYVP shield communication cable standards: YD/T322-2013 block communication cable structure features: HYAP city communication cable insulation using chromatography, lu: su composite sheath (namely cable is applied to longitudinally wrap shielding ribbon and sheath bonded into an organic whole, forming sealing sheath), has the superior electrical properties, the characteristics of the construction is convenient. Main electrical properties: 1. The shielding communication cable dc resistance: 20 ℃ and 0.4 1480.5 or less 95.00.6 65.80.8 36.6 or less or less or less. 2. Block communication cable insulation dielectric strength: conductor 1 min1kv no breakdown between the conductor and shield breakdown 3. 1 min3kv not blocked communication cable insulation resistance: each conductor and the rest of the grounding wire core, more than 10000 m Ω manufacuring HYA cable. Km, more than 3000 m Ω HYAT cable. Km. 4. Working capacitance of shielded communication cable: average value: 52 + / -2nf /km5
Mining cables, suitable for transmission in mines, can be used or fixed. ?
三、电气特性：额定电压：U0/U300/300V/300/450V测试电压:U3000V执行标准：符合德国VDE、GB。弯曲半径：8.0-7.0×电缆外径温度范围：移动安装：-15℃～+80℃我们生产的高柔性电缆、耐弯曲性能好抗扭动，价格明显优于同类进口产品，是替代进口产品的**选择。
使用条件1、额定电压U0/U：0.6/1KV.2、 电缆导体长期允许最高温度为90度,短路时最高温度250度3、 安装敷设环境温度不低于0度,固定敷设时环境温度不低于-10度.4、 电缆允许最小弯曲半径不小于15D(D-电缆外径,mm)产品性能1、 BRYJVP12R-TK、ZRBPYJVP12R-。
1) production time: the goods will be delivered on the same day as soon as they are available in stock, and the quantity to be customized shall be determined. 2) sales discount: large quantity is preferred. 3). Sales volume: teleconference. 4) delivery standard: the freight charge shall be borne by the seller. The arrival time is generally 3 days. If it is true that the products are not in conformity with the requirements of the contract due to product problems or the products provided by our company, we agree to the buyer to change the goods or reject the products and return the goods.
也就是说UDT的作用就是方便编程者的,对于程序的运行而言不是必需的.从数据类型的角度来说,UDT甚至不会被PLC直接接受.大家看西门子S7-300的程序的上传就知道了,将一个带有UDT的程序下载到PLC中,然后新建一个PLC,上传程序,在传上来的程序中你是找不到UDT的.UDT更像是对DB结构的注释!下面教大家如何在博途里使用UDT.在项目树中PLC数据类型中双击添加新数据类型对新建的数据类型重命名，如UDT在UDT中添加要用的变量，编译保存。
Organization code certificate: 10950374-4 CCC certificate no. : 2003010105102124 business license registration number: 131025100000917 registration certificate: 131025109503744 remittance account number: 91608040020110001507 opening bank: liuguxian rural credit cooperative, dacheng county, hebei province
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。
2.485信号线可以使用平行线作为布线，也可以使用非屏蔽线作为布线。由于485信号是利用差模传输的，即由485+与485-的电压差来作为信号传输。如果外部有一个干扰源对其进行干扰，使用双绞线进行485信号传输的时候，由于其双绞，干扰对于485+，485-的干扰效果都是一样的，那电压差依然是不变的，对于485信号的干扰缩到了最小。
IA-DJVVP2IA-DJYVP2IA-DJYJVP2本安型、铜塑复合膜总屏蔽。IA-DJVVP3IA-DJYVP3IA-DJYJVP3本安型、铝塑复合膜总屏蔽。IA-DJVPVPIA-DJYPVPIA-DJYJPVP本安型、编织分对屏蔽、总屏蔽（铜丝或镀锡丝）。