HCYV75-5视频线结构南和即时留言RVV电缆美满

HCYV75-5视频线结构南和即时留言RVV电缆美满

　　矿用电缆选择矿井供电系统中，高压供电线路一般都采用铠装电缆，其故障率相对低压供电所采用的[1]要少得多。采区供电是供电系统中的薄弱环节，工作环境又较差，因而如何选择电缆的型号与截面，关系到供电运行的安全。



We comply with the following production, sales and delivery criteria for all products: 1) production time: the goods can be delivered on the earliest day when there is a spot, and the needs to be customized. 2) sales discount: large 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 provided by our company are not in conformity with the re of the contract due to the problem of the products, we agree to the buyer to exchange or reject the products and return the goods.

　　钢丝铠装通信电缆HYA33HYAT33WDZ-HYA53HYY33HYYT33HYY33。充油通信电缆HYATZRC-HYATWDZ-HYATHYYT。全塑市话电缆执行标准：YD/T。全塑市话电缆结构特点：HYA型市内通信电缆采用全色谱高密度聚乙稀绝缘，铝塑综合护套(即电缆的纵包屏蔽铝带与护套粘结成一体，形成密封护层)，具有电气性能优越，施工方便的特点。

Cable length: mechanically protected cable is manufactured according to the standard length of the corresponding basic cable.



　　高传输频率分别为30MHz与100MHz。本规范以YD/T标准为准。HYA型市内通信电缆采用全色谱高密度聚乙稀绝缘，铝塑综合护套(即电缆的纵包屏蔽铝带与护套粘结成一体，形成密封护层)，具有电气性能优越，施工方便的特点。

刚开始学习的时候也是比较迷茫，不知道从哪里入手，同学推荐我先看郭天祥的“新概念51单片机C语言教程”，这本书算是我的启蒙吧，书里面介绍了基本C语言知识和编程软件KEIL，这本书好的一点就是浅显易懂，直接是把我这个单片机小白领进门的。书还有配套的视频也可以找来看看，看视频的话会更直观一点，便于快速入门。（这本书也有一定的局限性，后面再说，但入门足够）单片机前期的学习以会用为主。不要纠结于寄存器、定时器、中断这些单片机的内部结构以及如何工作的，开始学习单片机就像学车一样，学车时开始知道怎么加油挂挡刹车控制方向就好了，至于发动机、变速箱、转向助力是怎么配合的以后再说，先学会开车。

　　ZR-KVV32阻燃聚氯乙烯绝缘，细钢丝铠装阻燃聚氯乙烯护套控制电缆敷设在室内、电缆沟中、管道、竖井内及地下，能承受一定的拉力作用。注：根据用户需要可生产阻燃性（ZR）和无卤阻燃型（ZRA）控制电缆。

　　产品型号及性能：型号导体结构特性阻抗(Ω)衰减常数（不大于200HZAB/M）SYV—50—31/0.9050±2.50.264SYV—50—5—11/1.3750±2.50.181SYV—50—5—21/1.3750±7.50.181SYV—75—27/0.0875±5。
　　DJYPV(R)P22聚乙烯绝缘铜丝编织分屏总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。DJYV(R)P2-22聚乙烯绝缘铜带绕包总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。DJYP2V(R)22聚乙烯绝缘铜带绕包分屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。

Computer shielded cable; Purpose: high voltage insulation with small interface constant. Use to ground, and the screen, the total screen (or three quad twisted, group screening, group screen a total screen), such as structure form, with a small dielectric loss, the transmission ability is strong, resistant performance is good wait for a characteristic, can reliable transmission weak analog or digital, can be widely used in electricity, metallurgy, petroleum, chemical, textile sites detection and control of the door or by computer automation instrumentation, and general industrial computer. Relevant technical indicators: reference BS5308 IEC189 and British second, product code 1 and code the DJ - (series code) electronic computer shielded cable Y - (insulation code) high-pressure polyethylene F - (insulation code) fluoroplastic V - (sheath code) polyvinyl chloride (R - said many strands of soft wire core P - (block code) copper mesh shielding P1 tin plated copper mesh shielding P2 copper tape screened P3 aluminum-plastic composite membrane shielding for example 1:3, product specifications order 7 (14) to 1.0 was computer shielded cable can be represented as: (1) total shielding DJYVP7 * 2 * 1.0mm2 (2) partial shielding multiple strands of soft line DJYPVR7 * 2 * 1.0mm2 (3) total shielding type DJYPVP7 * 2 * 1.0mm2 Type (1) packet shielding DJYPV3 x 3 x 0.75 was (group 2) screen a total screen DJYPVP3 x 3 x 0.75 was three, model name and use range model name using range DJYVPDJYPVDJYPVP total shielding polyvinyl chloride polyethylene insulating sheath computer cable shielding polyvinyl chloride polyethylene insulation group sheathed electronic computer cable shielding total shielding polyvinyl chloride polyethylene insulation group sheathed electronic computer cable 1, fixed for laying indoors, in cable trench or pipe 2, cable long-term working temperature: - 20 ℃ + 65 ℃, the cable laying temperature is lower than 0 ℃, the bending radius should not less than 10 times of cable diameter DJYVPR DJYPVR DJYPVRP total shielding polyvinyl chloride polyethylene insulating sheath computer with a soft cable shielding polyvinyl chloride polyethylene insulation group sheathed computer with a soft cable shielding total shielding polyvinyl chloride polyethylene insulation group with a soft cable sheath computers shows that: (1) flame retardant cable (oxygen index greater than 30) need to add code "out" in front of the model. For example, zr-djypv zr-djypvp et al. (2) armored (steel belt armored) cables need to add code "22" in the lower right corner of the model, such as: DJYPV22 djypvpppvp22, etc. The cable is mainly used for ac or dc 300V or below and can work normally when 500V or below.



Flame-retardant cable indicators:

　　RVV本产品适用于交流额定电压450/750V以下的家用电器小型电动工具、仪器仪表及动力照明等装置的连接。工作温度：电缆长期允许工作温度不超过70℃。KVVP 铜芯聚氯乙烯绝缘和护套编织屏蔽控制电缆。

电网频率，我国为50HZ。p：电机极对数，2极电机，对数是1；4极电机，对数是2；8极电机，对数是4。比如一台2极电机，转速n=60秒×50HZ/极对数1=3000转。但这是同步转速，异步电机，转子转速低于定子旋转磁场转速，所以，异步转速还涉及到电机转差率的因素，转差率=（定子转速-转子转速）/定子转速，不同厂家生产的电机转差率也不同，通常在10％以内，一般在4％左右。异步转速和转差率关系：N=(60F/P)×(1-S%)，所以2极电机异步转速=3000×（1-4%）=2880转左右。

　　电缆抗外磁场能力：在频率为50Hz，强度为400A/m的外界磁场下，当电缆的一端输入频率为1KHz，电流强度在0-100mA变化时，电缆的另一端输入信号变化值不超过±50uA。型号及名称：序号型号名称主要使用范围1ia-KVPV铜芯聚氯乙烯绝缘及护套铜丝编织屏蔽本安用控制电缆聚氯乙烯绝缘复合屏蔽本安电缆具有良好的电性能和抗干拢性能，可用于高要求及强干扰场合。



　　电缆的阻燃性能符合国家标准GB 12666.5的要求。耐火BV线在导体和绝缘层之间有一层耐火云母带，耐火BV线在着火的时候仍然可以正常使用一段时间啊，电缆缆的耐火性符合国家标准GB 12666.6的要求。

　　二：产品执行标准Q/HHTZH004.1阻燃耐火特性试验执行GB标准三：使用特性1．交流额定电压：U0/U450/750KV2．高工作温度：聚全氟乙丙烯(F46)绝缘不超过200℃可溶性聚四氟乙烯(PFA)绝缘不超过260℃3．低环境温度：聚氯乙烯护套：固定敷设-40℃，非固定敷设-15℃氟塑料。

　　100对及以上线对的电缆加有1％的预备线对，但多不超过6对。缆芯内的间隙用石油膏填充。5、缆芯包带：用聚脂薄膜带绕包。6、屏蔽：铜丝屏蔽或用轧纹(或不轧纹)金属带，金属带纵包于通信电缆缆芯包带之外。7、护套：蓝色低密度聚乙烯。