理论上RS485的传输距离能达到1200米,但实际应用中传输距离要小于1200米,具体长度受周围的环境影响。RVVP屏蔽电缆执行标准JBRVVP屏蔽电缆产品介绍:RVVP屏蔽电缆,额定电压300V/300V。

2、产品使用特性:电缆导体的长期允许工作温度应不超过70℃。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。例如:ZR-DJYPVZR-DJYPVP等(2)铠装型(钢带铠装)电缆需在型号右下角加代号“22”例如:DJYPV22DJYPVP22等。
变频电缆使用条件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)变频电缆性能1、BRYJVP12R-TK、ZRBPYJVP12。
4.电缆安装敷设温度应不低于0℃5.耐火特性:符合IEC60331规定符合GB/T规定火焰温度750℃火焰温度750℃燃烧时间3h燃烧时间90min冷却时间12h附加电压额定电压附加电压额定电压附加电流2A附加电流3A6.敷设推荐的允许弯曲半径:非铠装、联锁或编织铠装电缆应不小于电缆外径的6倍铜带屏。

ZR-BPYJVP交联聚乙烯绝缘聚氯乙烯护套铜丝编织屏蔽变频电力电缆。ZR-BPYJVP2交联聚乙烯绝缘聚氯乙烯护套铜带绕包屏蔽变频电力电缆。ZR-BPYJVPP2交联聚乙烯绝缘聚氯乙烯护套铜丝编织铜带绕包屏蔽变频电力电缆。
另一条支路,则是熔断器FU2接在熔断器FU1端头U2V2W21上接触器KM2三相电动机M2。辅助电路的电源,一般是从主电路上接出来,电压既可能是380V,也可能是220V。-20中,辅助电路的电源是从主电路的两条相线上接出来,因此电压为380V。在图中,辅助电路有两条支路,即接触器KM1和KM2支路,其动作过程为:闭合电源开关QS后,主电路和辅助电路均有电压,辅助电路由线段U2V22和W2V22引出。
耐火电缆燃烧时产生的酸气烟雾量少,耐火阻燃性能大大提高,特别是在燃烧时,伴随着水喷和机械打击的情况下,电缆仍可保持线路的完整运行。•漆包线(绕组线)又称绕组线,用于电机绕组,将电能转化为机械能。•光织光缆用于传输光信号,因具有低衰减性能,常用作长途通讯的主干线。
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
主要用于火灾报警、消防设备、排烟设备、以及紧急通道运输、照明等应急设施的供电线路中需要耐火的场合。(4)电缆安装时的最小弯曲半径:a、低烟无卤阻燃、耐火控制电缆:无铠装层的电缆应不小于电缆外径的6倍,有铠装或铜带屏蔽结构的电缆应不小于电缆外径的12倍。
HYA23 armored communication cables; The mechanical protection layer can be added to any cable, with the mechanical strength and corrosion resistance of the cable. It is a communication cable designed for easy to be machined and vulnerable to corrosion. 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

RS485电缆RS485cable铠装双绞屏蔽电缆|RS485专用电缆ASTP在低速、短距离、无干扰的场合可以采用普通的双绞线,反之,在高速、长线传输时,则必须采用阻抗匹配(一般为120Ω)的RS485专用电缆(STP-120Ω(forRS485&CAN)onepair18AWG),而在干扰恶劣的环。
◎干线级-CMR级(直立燃烧测试RiserFlameTest)这是UL标准中商用级电缆(RiserCable),适用安全标准为UL1666。实验规定在模拟直立轴上敷设多条试样,用规定的154.5KW煤气本生灯(527,500BTU/Hr)30分钟。
plc的种类繁多,品牌大多分为欧系、日系、美系。德系PLC以西门子为主,日系有三菱、欧姆龙、松下……,美系有罗克韦尔(A-B)通用电气(GE)公司、莫迪(MODICON)公司等。美国和欧洲的PLC技术是在相互隔离情况下独立研究开发的,因此美国和欧洲的PLC产品有明显的差异性。而日本的PLC技术是由美国引进的,对美国的PLC产品有一定的继承性,但日本的主推产品定位在小型PLC上。美国和欧洲以大中型PLC而闻名,而日本则以小型PLC著称。
生产范围:型号额定电压导体标称截面0.50.751.01.52.54610芯数ZR-KVV450/750V或OR0.6/1kv-2-612-142-10-2-612-142-10-2-612-142-10-7-612-612-142-10-1。

PVV铜芯聚氯乙烯绝缘聚氯乙烯护套信号电缆。PVV32钢芯聚氯乙烯绝缘镀锌钢丝带铠装聚氯乙烯护套信号电缆。PYV钢芯聚乙烯绝缘聚氯乙烯护套、信号电缆。PYV32钢芯聚乙烯绝缘钢带铠装聚氯乙烯护套信号电缆。
产品介绍:一:产品特点及用途本产品适用于交流U0/U为300/500V电力、冶金、石化等行业以电子计算机为主的自动控制系统、计算机集散控制系统、自动化控制系统作控制线以及检测用仪器仪表用电子计算机电缆。
HYV、HSYV室内大对数通信电缆介绍:程控交换局内总配线架与交换局用户之间的音频连接,也可用作其它通信设备之间的音频连接,可支持低速率的数据传输,支持语音应用、数字电话、传真、程控交换机、数字设备的连接、电讯综合系统的分支线和主干线等,内导体线径(mm):0.40、0.50、0.60、0.70、0。