4X2.5格石林销售施工一体化4X2.5格简洁多年的“计算机电缆R;DJYPVPR22;DJYPVPR32;DJYJPV,DJVPVP,DJYPVP,DJYJPVP电子计算机电缆DJYVPR;D。
2.使用特性1额定电压U0/U为300/500V及以下。
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 quantity needs to be customized. 2) sales discount: large quantity 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 requirements of the contract due to the quality problem of the products, we agree to the buyer to exchange or reject the products and return the goods.
采用对绞、对屏、总屏（或三线组合、组屏蔽、组屏总屏）等结构形式，具有介质损耗小、传输传号能力强、抗干扰性能好等特点，能可靠地传输微弱的模拟信号，可广泛地应用于发电、冶金、石油、化工、轻纺等部门的检测和控制用计算机系统或自动化装置，以及一般的工业计算机上。
JVVP22，JVVP2-22，JVVP3-22，DJYVP22，DJYJVP22，DJVVP22，DJYPV22，DJYJPV22，DJVPV22，DJVPVP22，DJYPVP22，DJYJPVP220.5-1.5mm25-64对（3线组）DJYVP3-22,DJVVP3-22,DJYJVP3-。
This is the General Pure Cable in UL for the UL1581. The experiment required several samples to be laid on a vertical 8 foot high bracket and 20 minutes with the specified 20KW ribbon spray lamp (70,000 BTU/Hr). Qualified for flame not to spread to the upper end of the cable and self-extinguishing. UL1581 is similar to iec 60332-3c except that the number of cable roots is different. There is no smoke concentration specification for commercial grade cables, which is generally only used for horizontal running of the same floor, but not for vertical wiring of the floor.
为了保障变频器的安全运行，避免变频器受负载冲击，必须做好以下几点:㈠尽量保证变频器有充足的加减速时间变频器在开机或升速时，自身有软起动功能；关机或减速时，自身有软关断功能。
在设备允许的范围内，尽量增加加减速时间。
当设备要求有较短的加减速时间时，变频器应采取以下措施:加减速时间由变频器容量和负载来决定。
负荷越重，变频器容量越小，加减速时间设定应越长。
最短的加减速时间是由变频器的容量决定的。
假若运行过程中冲击电流在允许时间内超过变频器的额定电流，则必须增加变频器的容量。
NH-KFFP2氟塑料绝缘和护套铜带绕包屏蔽耐火控制电缆。
NH-KVDVD低烟低卤阻燃聚氯乙烯绝缘和护套耐火控制电缆。
NH-KVDVDP低烟低卤阻燃聚氯乙烯绝缘和护套铜丝编织屏蔽耐火控制电缆。
NH-KVDVDP2低烟低卤阻燃聚氯乙烯绝缘和护套铜丝编织屏蔽耐火控制电缆。
MHYV mine resistance net line MHYV mine net line 4*2*0.5,MHYV mine net line 4*2*0.8 standard 568A:
Dense places; In places with high safety requirements for dense cables or closed channels, automatic fire detection and alarm devices suitable for reliable operation of the environment should be equipped. The oil supply system of open oil charging cable should be equipped with automatic fire alarm and lock device which can reflect the state of oil spraying. Places with high safety requirements, such as dense cable parts of underground public facilities, terminal setting of multi-return oil-filled cables and other places, can be equipped with special fire fighting facilities such as water spray extinguishing.
一般推荐如下： 普通双绞屏蔽型电缆 STP-120Ω（for RS485 CAN） one pair 20 AWG ，蓝色护套，电缆外径7.7mm左右。
适用于室内、管道及一般工业环境。
使用时，屏蔽层一端接地。
Purpose and features: this product is suitable for transmission and communication in mine and underground monitoring. This product is flame retardant. Ii. Implementation: mt818.14-1999 fire retardant communication cable for coal mine and enterprise Q/ jg1710-2006. Iii. Usage features:? 1, cable long-term working temperature: - 30 ~ 60 ℃, cable laying temperature:????? Not below 0 ℃ 3, MHYV type bending radius is not less than 10 times of cable diameter. The bending radius of MHYBV is not less than 10 times of the cable diameter. The bending radius of MHYVP is not less than 10 times of cable diameter. The bending radius of MHY32 is not less than 15 times of the cable diameter.
4、型号、名称和使用范围型号名称使用范围铜芯铝芯VVVLV聚氯乙烯绝缘聚氯乙烯护套电力电缆敷设在室内、管道内、隧道内VYVLY聚氯乙烯绝缘聚乙烯护套电力电缆敷设在室内、管道内、管道中VV22VLV22聚氯乙烯绝缘钢带铠装聚氯乙烯护套电力电缆敷设在地下，能承受机械外力作用V。
两端接地屏蔽效果更好，但信号失真会增大。
请注意：两层屏蔽应是相互绝缘隔离型屏蔽。
如没有彼此绝缘仍应视为单层屏蔽。
最外层屏蔽两端接地是由于引入的电位差而感应出电流，产生降低源磁场强度的磁通，从而基本上抵消掉没有外屏蔽层时所感应的电压；而最内层屏蔽一端接地，由于没有电位差，仅用于一般防静电感应。
下面的规范就是佐证：《GB50217-1994电力工程电缆设计规范》——3.6.8控制电缆金属屏蔽的接地方式，应符合下列规定：计算机监控系统的模拟信号回路控制电缆屏蔽层，不得构成两点或多点接地，宜用集中式一点接地。
Low smoke zero halogen type refractory in addition to meet the low smoke zero halogen flame retardant, the performance of the fire test should be passed GB/T19216-2003 under the condition of the flame or the stipulations in the optical cable circuit integrity experiment, at 750 ℃, 90 min, 2 a fuse fusing.
Ratedpower-frequencyvoltageU0/U:450/750kV.•电缆导体的最高允许长期工作温度（PVC/XLPE）:70℃/90℃.siblecontinuousoperatingtemperatureofconductor(PVC/XLPE):70℃/90℃•短路时（最长持续。
The marking contents of armored communication cables include: wire diameter, number of wire pairs, cable model, length, manufacturer name and year of manufacture.
100对及以上的电缆加有1%的预备对。
缆芯包带：用聚脂薄膜带绕包。
屏蔽：用轧纹或不轧纹金属带纵包子缆芯包带之外，两边搭接。
屏蔽带表面涂敷的塑料薄膜与护层粘接电缆护套：黑色低密度聚乙烯。
电缆吊线：吊线为7股镀锌钢绞线，标称外径为6.2mm，4．8mm和3.6mm三种，其抗张强度分别不小于3000kg，1800kg，和1000kg吊线用热塑性涂料涂敷，以防钢丝锈蚀。