MKVVR4X0.75矿用软芯控制电缆西定尺生产BVR50平方电线美目

MKVVR4X0.75矿用软芯控制电缆西定尺生产BVR50平方电线美目

　　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。一般推荐如下：普通双绞屏蔽型电缆STP-120Ω（forRS485&CAN）onepair20AWG，电缆外径7.7mm左右。



　　计算机电缆1、计算机电缆执行标准：参照采用英国BS5308、日本JCS189。2、计算机控制电缆用途：本产品适用于额定电压450/750V及以下或直1000V及以下的发电、冶金、石化等工矿企业集散系统、电子计算机系统、自动化系统的信号传输及检测仪器仪表等。

　　滑行道边灯。装在滑行道两侧,间距小于60m,发出蓝光,标志滑行道两侧边界。机场灯按安装方式有立式和平地式两种，按光线在空间的分布有定向灯和全向灯两种，按发光强度有高、中、低3种。机场灯在结构上不同于一般户外灯具。

　　 NHB—VV22适用范围：同NHB—VV，用于能承受机械外力的场所。 NHA—VV22适用范围：同NHB—VV22，用于要求耐火较为苛刻的场所。 NHB—KVV适用范围：固定敷设于室内、隧道内、托架及管道中要求阻燃耐火的场所。



The cable is insulated by full-chromatograph solid polycondensation. The insulated wire is twisted into a pair of twisted wires. Suitable material of cable core is added to the cable core, and the plastic coated aluminum band shielding layer and the black outer expansion sleeve with the length mark in the counting order can be completed. Junction wire: solid annealed copper wire. Copper wire diameter is 0.32, 0.4, 0.6, 0.8 (mm).

判断题1.铁壳开关安装时外壳必须可靠接地。√2.在供配电系统和设备自动系统中,刀开关通常用于电源隔离。√3.触电者神志不清,有心跳,但呼吸停止,应立即进行口对口人工呼吸。√4.交流电流表和电压表测量所测得的值都是有效值。√5.测量电流时应把电流表串联在被测电路中。√6.接地电阻表主要由手摇发电机、电流互感器、电位器以及检流计组成。√7.电工应做好用电人员在特殊场所作业的监护作业。√8.特种作业人员未经专门的安全作业培训,未取得相应资格,上岗作业导致事故的,应追究生产经营单位有关人员的责任。

Sheathed control cable products use feature: the cable conductor of long term working temperature should be allowed no more than 70 ℃. When the cable temperature under installation should not below 0 ℃, when laying bending radius should not less than 10 times of cable diameter. The cable with armor layer or copper band shielding structure shall not be less than 12 times the outer diameter of the cable.

　　产品标准：YD/T产品型号：ZA-RVV（ZRRVVZRVVRRVVZ）通信电源用阻燃软电缆ZA-RVV22（ZRRVV22ZRVVR22RVVZ22）通信电源用阻燃钢带铠装软电缆本产品适用于架空、管道、室内电缆沟、地下直埋。
Cable conductor of long term working temperature should be allowed no more than 70 ℃, in the process of using cable should prevent high temperature radiation or contact; The environment temperature under installation should not below 0 ℃.


　　本产品具有较强的抗电磁干扰、抗雷击及均匀电场，改善供电品质的特性。特别适用具有精密电子装置的场所，如计算机中心、航空航天监控中心、智能大厦等。本产品按GB9330《塑料绝缘控制电缆》、IEC60227《额定电压450/750V及以下聚氯乙烯绝缘电缆》以及IEC60502《额定电压1-30KV挤包绝缘电力电缆及附件》等标准制造。

Communication cable (including paper insulated city words line, polyolefin insulation polyolefin sheath city spring), long distance symmetrical cable (including paper insulated high frequency long-distance symmetrical cable, copper foam polyethylene high low frequency long-distance symmetrical cable and digital transmission distance symmetrical cable), small coaxial cable, coaxial and tiny, coaxial cable, coaxial radio frequency coaxial cable). ;

Communication cable (including paper insulated city words line, polyolefin insulation polyolefin sheath city spring), long distance symmetrical cable (including paper insulated high frequency long-distance symmetrical cable, copper foam polyethylene high low frequency long-distance symmetrical cable and digital transmission distance symmetrical cable), small coaxial cable, coaxial and tiny, coaxial cable, coaxial radio frequency coaxial cable). ;

子程序调用指令用在主程序或其他调用子程序的程序中，子程序的无条件返回指令在子程序的后网络段。梯形图指令系统能够自动生成子程序的无条件返回指令，用户无需输入。子程序的调用是有条件的，未调用它时不会执行子程序中的指令，因此使用子程序可以减少扫描时间，同时可使整个程序功能清晰，易于查错和维护，还能减少存储空间。为了移植子程序，应避免使用全局符号和变量，V存储区中的地址。在编程软件的程序数据窗口的下方有主程序(OBI)、子程序(SUB0)、中断服务程序(INT0)的标签，点击子程序标签即可进入SUB0子程序显示区。

　　 7、自承式电缆：采用8字形挤出模具，对自承钢索与铝塑纵包缆芯同时挤塑。 8、铠装（适用于铠装电缆23、22、53型）；在综合护层外绕包两层镀锌钢带（适用于23、22型电缆）或纵包一层涂塑钢带（适用于53型电缆）。

　　四、型号、名称 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产品介绍-塑料绝缘控制电缆|KVV控制电缆|KVVR控制电缆|KVVP控制电缆|KVVP屏蔽控制电缆|KVVRP。



　　6）、应经受-15℃的低温卷绕试验或低温冲击试验.试验后试样表面应无目力可见的裂纹.2、低烟无卤耐火型除满足阻燃低烟无卤型的性能以外，其耐火试验应能通过GB/T在火焰条件下或光缆的线路完整性实验中的规定，在750℃90min燃烧，2A熔丝不熔断。

Strict control of national standard production; Outdoor telephone line (with ointment filling and armor - uv protection and waterproof - can be buried in the ground) HYAT53 communication cable filling oil cream series: mainly used for the more conductor wire and cable core to fill the gap, moisture-proof and insulation. It has high melting temperature, suitable viscosity and good low temperature toughness. Excellent heat and water resistance; Electrical insulation performance, small loss, and good compatibility with the inner and outer sheath of the cable, is a good heating applied cable filling composite. The model of HYAT cable filled with pva is zrc-hyat HYAT23 HYAT53 zrc-hyat23 zrc-hyat23 zrc-hyat 53HYYT. ZRC - HYAT; Low smoke halogen free communication cable filling oil paste series wdz-hyat wdz-hyat23 wdz-hyat53 oil-filled communication cable? HYAT??? HYAT23? HYAT53 flame-retardant oil-filled communication cable? ZRC - HYAT; WDZ - HYAT; ZR - HYAT53? WDZ - HYA53; Zr-hya23 communication cable model: HYA; HYA22; HYA23; HYA53; ZRC - manufacuring HYA; ZRC - HYA53; WDZ - manufacuring HYA; Oil-filled communication cable: outdoor oil-filled cable HYAT? HYAT23? HYAT53HYAT; HYA23; HYAT53; HYAT22; HYYT; ZRC - HYAT; WDZ - HYAT; ZR - HYAT53; Type: HYAC, HYYC armored audio cable; HYA22; HYA23; HYA53; HYAT22; HYAT23; HYAT53; ZRC - HYA53; WDZ - HYA53; ZR - HYA23; Zr-hyat23 wdz-hyat53 armored audio cable models: HYA53, HYAT53, HYV22, HYA22 (anti-rat, underground)?