YJV3X4+1X2.5厂家批发格（包运费）龙港什么格PVVP电缆满意主要型号及使用场合：型型号含义使用场合SBVV(P)聚氯乙烯绝缘（铝箔屏蔽）聚氯乙烯护套程控交换机电缆适用音频传输SBYV(P)-B聚烯烃绝缘（铝箔屏蔽）聚氯乙烯护套程控交换机电缆最高传输频率20MHzSBYV(P)-C聚烯烃绝缘（铝箔屏蔽）聚氯乙烯护套程控交换机电缆最高传输频率30。
Self-supporting full-plastic cable (HYAC) : self-supporting full-plastic cable has two kinds of concentric structure and calabash structure. The commonly used HYAC full-plastic cable is calabash structure. Wire: annealed bare copper wire with diameter of, 0.4, 0.5, 0.6, 0.7, 0.8 and 0.9; Color the insulation line according to the full chromatographic standard. A single insulated wire is twisted in pairs at different pitch to minimize crosstalk and a specified chromatographic combination is used to identify pairs of wires. Cable core: the cable core structure is based on 25 pairs of cables. More than 25 pairs of cables are assembled according to the unit. Each unit is wrapped with the unit of specified chromatogram to identify different units. More than 100 pairs of cables plus 1% of the reserve pair. Shielding: the shielding layer is made of corrugated metal tape which is wrapped vertically on the outside of the cable core wrap belt and firmly bonded on both sides. The metal strip of the shielding layer is coated with plastic film to facilitate bonding with the sheath to prevent corrosion of the shielding layer. Protective sleeve: protective sleeve is black low density polyethylene, can use double protective sleeve according to the need.
型号、额定电压、名称及用途：型号额定电压（V）名称用途KVV450/750铜芯聚乙烯绝缘聚氯乙烯护套控制电缆敷设在室内、电缆沟、管道固定场合KVVP40/750铜芯聚氯乙烯绝缘聚氯乙烯护套编织屏蔽控制电缆敷设在室内、电缆沟、管道等要求屏蔽的固定场合KVVP2450/750铜芯聚。
RS485接口连接器采用DB-9的9芯插头座，与智能终端RS485接口采用DB-9（孔），与键盘连接的键盘接口RS485采用DB-9(针).RS-485通讯电缆2X0.5 2X0.75 2X1.0 2X1.5RS-485通讯电缆在一般场合采用双绞线就可以，但在要求比较高的环境下可以采用带屏蔽层的双绞。
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 equipment, 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.
依次分别代表名称、材料、分类和序号。
电解电容器的极性判别方法：用万用表测量就可以了，先把电解电容放电，将表笔接到两端，摆动大的那次就对了，但要注意：指针表的正极对的是电容的负极，数字表两次测量之间，电容必须放电。
用引脚长短来区别正负极长脚为正，短脚为负；电容上面有标志的黑块为负极。
在PCB上电容位置上有两个半圆，涂颜色的半圆对应的引脚为负极。
电容器的分类：按照其极性分为二大类：有极性电容器（如电解电容）和无极性电容器。
KYJV22铜芯聚氯乙烯绝缘聚氯乙烯护套钢带凯装控制电缆。
KYJVR22铜芯聚氯乙烯绝缘聚氯乙烯护套钢带凯装控制软电缆KYJVP22铜芯聚氯乙烯绝缘聚氯乙烯护套铜线编织屏蔽、钢带凯装控制电缆。
KYJVRP22铜芯聚氯乙烯绝缘聚氯乙烯护套铜线编织屏蔽、钢带凯装控制软电缆。
DJVPV,DJVVP,DJYVP,DJYJVP,DJYPV,DJYJPV,DJVPVP,DJYPVP,DJYJPVP,DJVP3V,DJVVP3,DJYVP3,DJYJVP3,DJYP3V,DJYJP3V,DJVP3VP3,DJYP3VP3,DJYJP3VP3,DJYJVP3,DJYP3V,DJY。
Flame retardant signal cable for coal mine: MHYVR MHYBV MHYV32 MHYVR MHYVP MHYBV MHYVR32
3、型号、名称：见表1～表2表1本安计算机电缆型号电缆屏蔽结构及特征铜芯PVC绝缘铜芯PE绝缘铜芯XLPE绝缘IA-DJVPVIA-DJYPVIA-DJYJPV本安型、编织分对屏蔽（铜丝或镀锡丝）IA-DJVP2VIA-DJYP2VIA-DJYJP2V本安型、铜塑复合膜分对屏蔽I。
带钢丝绳PVC弹性体行车控制电缆使用特性:额定电压：U0/U450/750V及以下最高工作温度：100℃最低环境温KVVRC带钢丝绳的PVC行车控制电缆KVVRC带钢丝绳PVC行车控制电缆具有柔软、耐磨、防油等特性，线旁附钢丝绳，增强抗拉力。
铠装双绞屏蔽型电缆ASTP-120Ω（forRS485&CAN）onepair18AWG，电缆外径12.3mm左右。
可用于干扰严重、鼠害频繁以及有防雷、防爆要求的场所。
使用时，建议铠装层两端接地，最内层屏蔽一端接地。
在使用数字万用表测量电压参数时，如果不知道所测电压的大致范围，应先把测量挡置于最高挡，通过测量其值后再换挡测量，以得到比较**的数值。
如果所要测量的电压数值远超出万用表所能测量的最大量程，应另配高阻测量表笔。
下面是老师傅的万用表的顺口溜测直流电流量程开关拨电流表笔串接电路中正负极性要正确换好档后再测量测直流电压档位量程先选好表笔并接路两端红笔要接高电位黑笔接在低位端换挡之前请断电测交流电压量程开关选交流单位大小符要求表笔并接路两端极性不分正与负测量高压要换孔勿忘换挡先断电测电阻测电阻，先调零，。
一些常见问题:(希望各位买家能花上几分钟时间认真阅读)1.电线一扎长度:100米,正负误差2-3米;2.电线型号:BV单股,BVR多股,BVV双胶单股,BVVR双胶多股;3.电线常用规格:1平方/1.5平方/2.5平方/4平方/6平方/10平方等;区别:BV为单股线,BVR为多股,BVR比BV贵5%。
MHY32（PUYV39、PUYV39-1）矿用聚乙烯绝缘阻燃聚氯乙烯护套单层钢丝铠装井筒信号电缆用于斜井或竖井中作主信号电缆MHYVRP（PUYVRP）矿用聚乙烯绝缘阻燃聚氯乙烯护套铜丝编织屏蔽信号软电缆用于井下平巷或斜巷作信号电缆MHYVP（PUYVP）矿用聚乙烯绝缘阻燃聚氯乙烯护套铜丝编织屏蔽。
全塑市话电缆主要电气性能：1.直流电阻:20℃0.4≤148?/km0.5≤95.0?/km0.6≤65.8?/km0.8≤36.6?/km2.绝缘电气强度：导体之间1min1kv不击穿导体与屏蔽1min3kv不击穿3.绝缘电阻：每根芯线与其余线芯接地充气电缆大于10000MΩ.km填充式电缆大于3。
铠装通信电缆型号HYA53WDZ-HYA53ZRC-HYA53。
填充式铠装通信电缆型号HYAT53WDZ-HYAT53ZRC-HYAT53 HYV53 HYA53。
其它铠装通信电缆型号HYA22HYV22HYAT22HYY23HYYT23HYA23HYAT23。