吊线和电缆用同一外护层,经济实用,安装敷设方便。
在一30~C一60~C的环境条件下,电缆的机械和电气性能保持不变。
结构:导线:退火裸铜线,铜线直径为0.32,0.4,0.50,0.60,0.70,0.80,0.90mm。

使用条件●环境温度:-40~50℃●月平均最大相对温度:95%(+25℃)●安装敷设环境温度:≥-10℃●安装时最小弯曲半径:MHYV、MHJYV为电缆外径的10倍,其他型号为电缆外径的15倍●电缆型号、名称及使用范围型号名称使用范围MHYV煤矿用聚乙烯绝缘聚氯乙烯护套通信电缆用于平巷、斜巷。
This product is suitable for electronic computers with rated voltage of 500V or below, and cables for automatic connection, which have high requirements for protection. The k-type B low-density polymer with anti-oxidation property is adopted for the insulation of cable ground core. High insulation resistance, good voltage resistance, low dielectric coefficient and low dielectric loss temperature and variation of the medium can not only meet the requirement of transmission performance, but also ensure the service life of the cable. ? The cable is shielded for cross - circuit interference and external. The shielding requirements of cables are respectively adopted according to different conditions: the total shielding of the hinged cable, the total shielding of the hinged cable, and the total shielding of the hinged cable after the hinged cable is shielded. Shielding materials are round copper wire, copper belt, aluminum belt/plastic composite belt three. The insulating property of shielding pair and shielding pair. The transmission of the cable will not be affected if there is potential difference between shielding pair and shielding pair in use.
获得MA标志产品;井筒信号电缆|井下电缆井下电缆MHYA对)MHY对)MKVV芯)获得煤安证的产品:井筒信号电缆MHYV(1-10对)MHYAV(5-100对)MHYA对)MHY对)MHYVP(2-10对)MHYVRP(2-10对)MKVV(2-61芯)MKVV芯)MKV。

NH-KYDYD低烟无卤阻燃聚烯烃绝缘和护套耐火控制电缆。
NH-KYDYDP低烟无卤阻燃聚烯烃绝缘和护套铜丝编织屏蔽耐火控制电缆。
NH-KYDYDP2低烟无卤阻燃聚烯烃绝缘和护套铜丝编织屏蔽耐火控制电缆。
但断路器增大了,在电路中没有开启所有电器,而是只开启了一个电器的时候,电器过载,但电流依旧没有达到断路器的额定电流,也就不会跳闸、起不到保护作用。
且2.5平方电线的载流量,国标下行规定为16A(数据来源《GB/T4706.1-2005》),也就是说,载流量为16A的电线,就允许出售。
在220V电路中,3520W功率的电器,产生的电流就会超过16A。
如果将3000W以上的电器放在一个回路内,干路电流势必过载。
Integrated stranded railway signal cable implementation standard GB/ t2476-1993. Railway signal cables are suitable for transmission of railway control signals, audio signals or fixed cables for fixed installation in rated voltage ac 500V or dc 1000V or below. Product name, model, specification and scope: plastic insulation and PVC sheathed railway signal cable PTYAH; PTYA; PZYA; PTYV; PTYY,; PTY22; PTY23; (PZY02; PZY03; PZY23 PZY22) 1/0.8mm (1/1.0mm) 2-48 core is suitable for railway signal communication, fire alarm signal, telegraph and other automatic device systems with rated voltage ac 500V or dc 1000V or below. Polyethylene polythene insulation composite sheath steel tape armoured PVC sheathed railway signal cable PTYA23 PTYA22 PTY23 PTY22 PTYAH23 PZYA23 PZYA22 PZY23 PZY22 0.8 mm (1/1.0 mm) 4-61 core is fit for ac rated voltage 500 v or dc voltage 1000 v and below audio signal transmission and fixed installation of railway signal and group control automation assembly line, is of general automatic transmission railway signal, can also transmit frequency shift automatic block and business phone and other audio signal. 4, using features: cable in - 40 ℃ to + 50 ℃ environment use. Cable conductor long-term working temperature shall not exceed 70 ℃. Ordinary sheath of the cable laying under the environment temperature is not lower than 5 ℃, resistance to sheath for - 10 ℃. The bending radius shall not be less than 15 times of the outer diameter of the cable (when laying) and shall be applicable to any horizontal disturbance
电缆的型号名称及规格型号名称截面mm2芯数主要用途KVV铜芯聚氯乙烯绝缘聚氯乙烯护套控制电缆0.75~62-61敷设在室内、电缆沟管道固定场合KVVP铜芯聚氯乙烯绝缘聚氯乙烯护套编织屏蔽控制电缆0.75~62-61敷设在室内、电缆沟管道等要求屏蔽的固定场合KVVP2铜芯聚氯。
在一定条件下,也可用于传输2048kbit/s以上的数字信号。
适用于市内、近郊及局部地区架空/管道敷设线路中也可以直埋。
最高传输频率分别为30MHz与100MHz。
1、用途:本产品供交流额定电压500V或直流电压1000V及以下配电装置中电器,仪表接线之用。
WDNA-YJY/WDNB-YJY交联聚乙烯绝缘护套A(B)类无卤低烟耐火电力电缆可敷设在对无卤低烟且耐火有要求的室内、隧道及管道中。
WDNA-YJY23/WDNB-YJY23交联聚乙烯绝缘钢带铠装护套A(B)类无卤低烟耐火电力电缆适宜对无卤低烟且耐火有要求时埋地敷设,不适宜管道内敷设。

合格标准为火焰不可蔓延到12英尺高的房间的上部。
干线级电缆没有烟雾浓度规范,一般用于楼层垂直和水平布线使用。
◎商用级-CM级(垂直燃烧测试VertialTrayFlameTest)这是UL标准中商用级电缆(GeneralPurposeCable),适用安全标准为UL1581。
DJYP2V铜芯聚乙烯绝缘,对绞铜带屏蔽,聚氯乙烯护套电子计算机电缆DJYP3V铜芯聚乙烯绝缘,对绞铝/塑料薄膜复合屏蔽,聚氯乙烯护套电子计算机电缆DJYP2VP2铜芯聚乙烯绝缘,对绞铜带屏蔽,铜带总屏蔽聚氯乙烯护套电子计算机电缆DJYP3VP3铜芯聚乙烯绝缘,对绞铝/塑料薄膜复合屏蔽。
plc是可编程逻辑控制器的英文缩写。
由于众所周知的优点,最近十年来PLC的发展既应用领域是十分可观。
为此学习和掌握一定的PLC技术知识,成为当前我们电工从业者技术架构中必要的一环。
对于这一点相信参加过电工技能等级考试的同行都有切身体会。
笔者系某技术培训机构教师,自2015年以来一直负责电工PLC技术(初、中级)的培训教学工作。
在同广大电工同行一起学习的过程中,本人发觉有部分电工同行在初学PLC程序编程时,或多或少地都会出现一些不足和错误。
二、电缆的型号、名称及使用范围型号名称使用范围DJYVP聚乙烯绝缘对绞组铜线编织总屏蔽聚氯乙烯护套计算机电缆固定敷设在室内、电缆沟或管道内DJYVP2聚乙烯绝缘对绞组铜带总屏蔽聚氯乙烯护套计算机电缆DJYVP3聚乙烯绝缘对绞铝塑复合带总屏蔽聚氯乙烯护套计算机电缆DJYPV聚乙烯绝缘对绞组铜线编织分屏。

Identification and length marking: there is a sexual identification mark on the cable appearance, and the marking interval is not more than 1m.
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
屏蔽材料有圆铜线,铜带、铝带/塑料复合带三种。
屏蔽对与屏蔽对具有较好的绝缘性能,电缆在使用中若屏蔽对屏蔽对之间出现电位差时,不会影响信号的传输质量。
用途:,本产品选用介点常数小的高压聚乙烯绝缘。
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。