Precautions for installation of power cables: keep 2m distance when the cable is installed in parallel with the thermal pipe, and 0.5m should be maintained when crossing. The cable shall be installed at a distance of 0.5m in parallel or across other pipelines. When the cable is directly buried and installed, the direct buried depth of 1-35kv cable is less than 0.7m. When 10KV and below cables are installed in parallel, the net distance between them shall not be less than 0.1m and 10-35kv shall not be less than 0.25m. The distance of cross installation is not less than 0.5m. Cable laying temperature lower than 0 ℃, bending radius: multi-core cable or 15 (D + D), a single cable 20 or more (D + D), (D for cable diameter, D) for the conductor diameter. ? 6KV and above cable connector:? When installing the terminal head of the cable, the semiconductor electrical shielding layer must be stripped off. During operation, the insulation shall not be damaged. The shield end should be flat and the graphite layer (carbon particles) should be clean. (2) plastic cable end copper tape screened and armor must be good grounding, the short circuit also follow this principle, avoid unbalanced three-phase run ShiGang armoured end produce inductive electromotive force, and even "lighter" and sheath and other accidents. It is required to use my tinplate to braid copper wire for grounding lead. When connecting with the cable copper belt, it should be welded with chromium-iron tin. ? The shield of three-phase copper tape should be connected with ground wire respectively. Note that the shielded ground wire and steel armor ground wire should be separately drawn out and insulated from each other. The position of the welded ground wire should be as low as possible. Basic re for cable terminals and intermediate joints: a. good conductor connection; B. The insulation is reliable, and it is recommended to use irradiated cross-linked heat-shrinkable silicone rubber insulation materials; C. good sealing; D. sufficient mechanical strength to meet various operating conditions. The end of the cable must be used to prevent water and other corrosive materials from corroding, in order to prevent the water tree caused by the aging of the insulation layer and breakdown. Crane or forklift should be used for the loading and unloading of cables. It is forbidden to run flat or lay flat. For installation of large cables, cable laying cart should be used to avoid external damage or abrasion caused by manual dragging. If the cable cannot be laid in time for some reason, it should be stored in a dry place to prevent sunlight from exploding and water entering the end of the cable. ? Note: the installation of wire and cable should be familiar with the performance of wire and cable installation personnel or full-time technical personnel, if there are still unclear matters, ball related technical department or technical department of our factory.
型号产品名称电压V芯数截面mm2主要适用范围KVV阻铜芯聚氯乙烯绝缘聚氯乙烯护套电缆450/7504-370.75-10敷设在室内，电缆沟、管道等固定场合KVV22铜芯聚氯乙烯绝缘聚氯乙烯护套钢带铠装kvv22电缆450/7504-370.75-10敷设在室内，电缆沟、。
YQ,YQW轻型橡套软电缆用于轻型移动电器设备和工具YZ,YZW中型橡套软电缆用于各种移动电器设备和工具YC,YCW重型橡套软电缆用于各种移动电器设备，能承受较大的机械外力作用我橡塑电缆厂的野外用橡套电缆（YCW电缆，YZW电缆）是为适应野外用工矿企业调整发展的需要，生产性能优良的橡皮绝。
全国电线电缆行业又有了良好的市场机遇，各地电线电缆企业抓住机遇，迎接新一轮城乡电网建设与改造2012年9月26日，由印度尼西亚电线电缆协会、马来西亚电线电缆协会、越南电线电缆协会以及台湾地区电线电缆行业公会等6个行业组织构成的"亚洲电线电缆行业组织（AWCCA）"在上缆正式成立。
RS485电缆美制标准AWG与公制、英制单位对照表美制AWG外径截面积(mm2)电阻值(W/km)美制AWG外径截面积(mm2)电阻值(W/km)公制mm英制inch公制mm英制inch4/020.。
如在对回路线的异常检查方面，就要做好记录，将问题能得到详细妥善的解决，保障继电保护工作的顺利实施。
第二，加强继电设备运行状态统计工作的科学落实。
状态检修工作的实施中，就要有描述设备状态的准确数据，设备的损坏是逐步发展的，有着相应的规律，而掌握了这些规律对继电保护的状态检修工作开展就提供了理论依据，对实际问题的解决效率也能有效提高。
这就需要加强对相关设备运转时间以及启停次数和环境条件等相关状态数据信息的掌握，从而来更好的指导实际检修工作的实施，这对系统以及设备的安全性保障就有着重要作用。
Armoured communication cable armoring cable type: HYA53, HYAT53, HYA23 HYAT23, HYV22, HYA22 (rat, buried) armoring communication cable USES: armoured communication cable mechanical protective layer can be appended to the structure of the cable, with the mechanical strength of the cable, antierosion capability, is vulnerable to mechanical and designed and vulnerable to erosion area telephone cable. Any kind of laying can be adopted, which is more suitable for direct buried laying in rock area. Armored communication cable structure: 1. Basic cable: any filled and unfilled cable with single sheath or double sheath structure. 2. Armored communication cable mechanical protection layer: type 53 adopts 0.15mm thick corrugated steel belt, which is longitudinal wrapped on the basic cable and overlapped on both sides. The surface of the steel belt is coated with plastic to prevent corrosion and water intrusion. The type 23,22 has similar performance with double steel band wrapping. 3. Armored communication cable sheath: black high-molecular weight low-density polyurethane or polyurethane sheath. Sheath thickness may depend on the basic cable outer diameter. 5. The marking contents of armored communication cables include: wire diameter, number of wire pairs, cable model, length, manufacturer name and year of manufacture. 6. Armored communication cable electrical characteristics: the cable meets all the electrical re of the basic cable. 6. Cable length: mechanically protected cable is made according to the length of the corresponding basic cable
2、产品使用特性：电缆的交流额定电压500V以下，电缆线芯的长期工作温度应不超过70℃。
电缆允许弯曲关径应不小于电缆外径的6倍，敷设温度应不低于0℃。
2. 绝缘颜色：3.3线芯为一根红色一根蓝色，0.85线芯为一根白色一根绿色，白色线芯外绕包一层铝箔。
White - 1 standard 568 b: orange, orange - 2, green and white - 3, blue - 4-5 of white and blue, and green - 6, brown and white - 7, brown - 8
DJVP2V(R)P2-22聚氯乙烯绝缘铜带绕包分屏总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。
DJVV(R)P3-22聚氯乙烯绝缘铝塑复合带绕包总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。
电缆导体长期工作温度应不超过70℃。
普通护套的电缆在环境温度不低于-5℃下敷设，耐塞护套为-10℃。
弯曲半径不低于电缆外径的15倍（敷设时），且适用于任何水平差的干扰国标电力电缆;配电用电力电缆。
有耐火、阻燃型、钢丝、钢带铠装型、单芯、多芯、软结构、屏蔽型、同心导体型、辐照交联电缆、低烟无卤型等。
DJYP3V(R)P3-22聚乙烯绝缘铝塑复合带绕包分屏总屏聚氯乙烯护套钢带铠装计算机用屏蔽(软)电缆。
DJVV(R)P聚氯乙烯绝缘铜丝编织总屏聚氯乙烯护套计算机用屏蔽(软)电缆。
DJVPV(R)聚氯乙烯绝缘铜丝编织分屏聚氯乙烯护套计算机用屏蔽(软)电缆。
由于漏电保护器的作用是防患于未然，电路工作正常时反映不出来它的重要，往往不易引起大家的重视。
有的人在漏电保护器动作时不是认真地找原因，而是将漏电保护器短接或拆除，这是极其危险的，也是**不允许的。
注意：漏电保护器必须要求有极高的灵敏性，使用知名品牌往往能提高安全性，因为它们对线路的检测非常精密、灵敏，在0.1秒甚至更短的时间内就可以检测到异常，并在电流强度和时间尚未达到伤害程度前，就立即跳闸，切断电源主回路，充分保证了人身安全。
屏蔽层：镀锡铜丝高密度编织,屏蔽层覆盖率85%；西门子现场总线|西门子总线电缆6XV1830-0EH10导体:裸铜丝,1*0.64mm导线面积：>0.34mmW线芯颜色:绿色-红色屏蔽层:铝塑带+镀锡铜丝编织护套:PVC3DRX22X02R特性阻抗:150Ω直流电阻:57.5Ω/km工作温度:-30。
电缆地线芯绝缘采用具有抗氧化性能的K型B类低密度聚乙烯。
聚乙烯的绝缘电阻高，耐电压好，介电系数小和介质损耗温度和变频率的影响也小，不但能满足传输性能的要求，能确保电缆的使用寿命。
为了减少回路间的相互串扰和外部干扰，电缆采用屏蔽结构。
ZR-BPVVP2聚氯乙烯绝缘和护套铜带绕包屏蔽变频电力电缆。
ZR-BPVVPP2聚氯乙烯绝缘和护套铜丝编织铜带绕包屏蔽变频电力电缆。
ZR-BPVVP3聚氯乙烯绝缘和护套铝聚酯复合膜绕包屏蔽变频电力电缆。
电缆型号、名称、规格及用途型号名称规格用途MKVV铜芯聚乙烯绝缘聚氯乙烯护套阻燃矿用控制电缆（2-14)**(0.75-2.5)铺设在室内、电缆内、管道等固定场合MKVV22铜芯聚乙烯绝缘聚氯乙烯护套钢带锴装阻燃煤矿用控制电缆(7-61)*(0.75-1.5)(。