低烟无卤ZR-RVVP2X1.0阻燃控制电缆郓城推荐WDZ-RVVY3X6平方低烟无卤电源线冬月

低烟无卤ZR-RVVP2X1.0阻燃控制电缆郓城推荐WDZ-RVVY3X6平方低烟无卤电源线冬月

　　产品用途：安全防范产品配套传输线缆、停车场监视电缆、三表远程控制线缆、电子线、通信电缆、火灾报警探测设备传输线缆、摄像头连接用视频线电源线信号线、成套电气配电柜连接用电线电缆。、学校教学设备传输电线电缆、智能数码保安监控系统线缆、电子机房工程电缆、闭路电视监控系统线缆、图像网络传输系统线缆、背景音乐系统线缆。



　　HJYV/SA成束阻燃型聚乙烯绝缘、聚氯乙烯护套、呼叫通信电缆。HJYVP/SA成束阻燃型聚乙烯绝缘、聚氯乙烯护套、编织总屏蔽呼叫通信电缆。HJYVP2/SA成束阻燃型聚乙烯绝缘、聚氯乙烯护套、铜塑复合带绕包总屏蔽呼叫通信电缆。

　　DJVP3V(R)P3聚氯乙烯绝缘铝塑复合带绕包分屏总屏聚氯乙烯护套计算机用屏蔽(软)电缆。DJVV(R)P22聚氯乙烯绝缘铜丝编织总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。DJVPV(R)22聚氯乙烯绝缘铜丝编织分屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。

Call communication cable product features low cable of rated voltage: the minimum working temperature is not lower than 500 v low cable - 40 ℃. The highest long-term low cable allows working temperature: polyethylene insulation is not higher than 70 ℃; Cross-linked polyethylene insulation is not higher than 90 ℃. Low cable temperature: the minimum 0 ℃. Preheat if below minimum laying temperature. 's main electric cable performance: (l) 20 ℃ conductor dc resistance: 0.75 was no more than 26 / km; 2.0 was no greater than 9.8 Ω/km (2) 20 ℃ when the cable insulation resistance: 0.75 was not less than 300 m Ω • km; 2. Om Ω • Omm2 not small to 10 km. (3) voltage test between cable core and cable core, and between wire core and shield through ac 2500V/5min. (4) the working capacitance of the cable set shall not exceed 100pF/m when the test frequency is 1kHz. (5) the capacitance imbalance of the cable set shall not be greater than 250pF when the test frequency is lkHz and the cable length is 250Im. The combustion characteristics of the ending cable



The sheath is made of flame retardant material with high coefficient. Adopt advanced technology production, make the impedance uniformity of the cable good. The multi-core cable is more convenient in the rack laying. According to the need can produce flame retardant, cold - resistant, heat - resistant and other special re

常见的做法是全屋做吊顶，利用吊顶对管线进行遮盖——又是钱的问题。墙壁开槽，只能开竖槽，横槽距离不能超过30cm（横向开槽会影响墙壁承重）。。）所以，哪怕是两个距离不算长的插座或水龙头，我们也需要从天花板开两条长长的竖槽——钱钱钱。比较难处理的是横梁问题，如果遇到横梁，要么直接开孔打眼走线——但这种做法是违规的，横梁上禁止开孔。要么开一条很长的竖槽，从天花板走管——嗯，钱包颤抖了吗？3.管线固定问题地面上无论有没有开槽，在铺地板的时候都会有水泥将管线包裹起来。

　　 9、外护（适用于铠装电缆23、22、53型）：在铠装层上挤塑一层聚乙烯或聚氯乙烯。 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及以下或直流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。

　　执行标准：GB9330－1988和Q/SCT－J02.04－1999使用特性：电缆导体的高额定温度为：聚氯乙烯绝缘电缆为70℃，交联聚乙烯绝缘电缆为90℃。电缆敷设时的环境温度不低于0℃。电缆敷设时的弯曲半径为：无铠装层的电缆，应不小于电缆外径的6倍，有铠装层或铜带屏蔽的电缆应不小于电缆外径的12倍。
Such a cable structure features: type manufacuring HYA communication cable chromatography used in high-density polyethylene polythene insulation, lu: su composite sheath (namely cable is applied to longitudinally wrap shielding ribbon and sheath bonded into an organic whole, forming sealing protection layer), has a superior electrical properties, the characteristics of the construction is convenient. Such a cable main electrical properties: 1. The dc resistance: 20 ℃, 0.4 148 or less? / km 0.5 95.0 or less? / km 0.6 65.8 or less? / km 0.8 36.6 or less? / km2. Insulated electrical strength: 1 min 1 kv no breakdown between the conductor and conductor shielding 1 min 3 kv is not breakdown (3) insulation resistance: each conductor and the rest of the grounding wire core, inflatable cable is more than 10000 m Ω. Km, filling type cable is more than 3000 m Ω. Km. 4. Working capacitance: average value: 52 + / -2nf /km5

　　目前，常用的有两类：50Ω和75Ω的射频同轴电缆。特性阻抗75Ω射频同轴电缆常用于，故称为CATV电缆，传输带宽可达1GHz，目前常用CATV电缆的传输带宽为750MHz。（2）对称射频电缆对称射频电缆回路其电磁场是开放型的，由于在高频下有辐射电磁能，因而使衰减增大，并导致屏蔽性能差，再加上大气条件的影响，通常较少采用。



　　煤矿用阻燃通信电缆一、执行标准：MT818.14—1999和《煤矿用阻燃通信电缆检验细则》二、产品命名代号煤矿用阻燃通信电缆…………………………………MH聚乙烯绝缘……………………………………………Y铜质线芯………………………………………………省落铝—聚乙烯粘结护层…………………………………A聚乙烯。

　　ZR-YJV22ZR-YJLV22ZR-YJV23ZR-YJLV23交联聚乙烯绝缘阻燃聚氯乙烯/聚乙烯护套钢带铠装动力电缆敷设在室内、隧道内直埋土壤，电缆能承受机械外力作用。2、可根据用户要求，生产0.6/1KV圆形导体结构或扇形导体结构的各类五芯电缆。

如果没有这个二极管的，因为输出和电源端没有上拉电阻，输出端和电源端是完全开路的，所以它的电阻，一定大于输出对地端，从这里也可以猜到到这是NPN型传感器PNP三极管和输出PNP型三极管，导通条件和NPN型的反过来了，要求VEVBVC，所以它可以接到电源这头，直接用来断开电源V+输出，上图是一个PNP的OC输出原理图，和NPN刚好颠倒，它的发射极E挂到电源VCC上了，只要通电了，IO输入高电平，则满足导通条件，OUT和VCC正极连接，OUT也将输出高电平，当IO输入低电平，三极管截止，OUT将变成低电平。

　　三、型号、名称、用途 型号名称主要使用范围MHYV煤矿用聚乙烯绝缘聚氯乙烯护套通信电缆用于矿场作普通信号传输，适用于固定敷设 四、产品主要技术指标项目单位指标0.40.751.01.520℃时导体直流电阻不大于Ω/km43.824.518.112.1电缆工作电容不大于。



　　2.电缆耐火防护电缆数量较少时，可用防火涂料、包带加于电缆上或把电缆穿于耐火管。同一通道中电缆较多时，宜敷设于耐火槽盒内，且对电力电缆宜用透气型式，在无易燃粉尘的环境可用半封闭式，敷设在桥架上的电缆防护区段不长时，也可采用阻火包。

　　A类阻燃性能优于C类阻燃性能。使用特点额定电压U0/U为450/750V。电缆导体的长期允许工作温度为70℃。电缆的敷设温度不低于0℃。推荐的允许弯曲半径无铠装层的电缆，应不小于电缆外径的6倍。有铠装、铜带屏蔽结构的电缆，应不小于电缆外径的12倍。

Spin cassette XF5-273 communication cable transfer box, adopting advanced technology at home and abroad, in accordance with the international advanced standard production in the eighty s of cable wiring e, for the city, the town of telecommunication network backbone cable and wiring cable transfer. Features: 1. The connection jumper adopts rotary clamp-type connection and is sealed with silica gel on the metal clip, because it is not only reliable and durable, but also easy to operate and repair without stripping. 2. The wiring terminals in the handover box shall be arranged in 25 pairs as a basic unit, consistent with the basic units of the local telephone cables and marked with Numbers on the terminals to facilitate construction and maintenance. 3. The structure, arrangement and installation dimensions of the wiring modules are exactly the same as those of 3M products and can be used for each other. 4. The box body is treated by electrostatic spraying, beautiful and generous, with clear lines, good anti-corrosion and waterproof performance and long service life. Main technical parameters: the environment temperature: - 40 ℃ ~ + 65 ℃ atmospheric pressure: 70 ~ 106 kpa relative humidity: 95% or less is random ends and insulation resistance between terminals and ground > 5 x 104 Μ Ω. When connecting any two ends and any terminals and grounding to 1000V ac, there shall be no breakdown or flying arc in 1min. Contact resistance between wire and terminal < 5 x lO - 3 Ω.