充油通信电缆HYATZ10X2X0.5顺庆中心NH-KVV4X1.5耐火控制电缆寒冬

充油通信电缆HYATZ10X2X0.5顺庆中心NH-KVV4X1.5耐火控制电缆寒冬

　　局用交换机电缆SBVV型电缆用于程控交换机设备间、交换局内的总配线架与交换局用户电路板之间的连接，也可用作通信设备连接.交换机电缆SBVV电缆产品说明：主要用于程控交换机设备间、交换局内的总配线架与交换局用户电路板之间的连接，也可用作通信设备之间连接。



　　2、每个电缆包装上应附有产品质量证明单，证明单放在不透水的袋内，并固定在电缆盘侧。c、吊装包装件时严禁几盘同时起吊。在车辆、船舶等运输工具上，电缆盘必须放稳，并用合适的方法固定，防止互撞或翻倒。低环境温度:固定敷设-40℃,非固定敷设-15℃。

RS485 bus due to its wiring is simple, stable and reliable and widely used in video surveillance, access control intercom, building alarm and other fields, however, because there are a lot of in the process of 485 bus wiring is not completely accurate concept leads to many problems. Some wrong ideas will now be clarified.

MHYVP 2 * 3.3+2 * 0.85 data for mine shielded communication cable 1. Tin coated copper wire is used for conductor, 47/0.3 for conductor, 12/0.3 for 0.85, and 7/0.28 tin coated copper wire for drainage line. 2. Insulation color: 3.3 the wire core is a red one and a blue one, while the 0.85 wire core is a white one and a green one. The white wire core is wrapped with aluminum foil. 3. Insulation thickness: 3.3 core insulation thickness is 0.5, and the outside diameter after insulation is 3.5 mm. The insulation thickness of wire core is 0.7 and the outside diameter after insulation is 2.5mm. 4. Into line with the four wire core is arranged for red, green, blue, white, streamline, and row streamline to conductors are twisted together, don't put longitudinal, are not added when cabling filler, external use aluminum foil winding and cable core, then a layer of polyester film around the package, the outside is a layer of copper wire braided shielding (shielded copper wire tin plating). 5. Sheath: the front diameter is 8.2mm, the back diameter is 12mm (between 11.7mm and 12mm), and the sleeve is flame retardant blue



　　屏蔽带表面涂敷的塑料薄膜与护层粘接自称是电缆护套：黑色低密度聚乙烯。自承式电缆吊线：吊线为7股镀锌钢纹线，标称外径为6.3mm和4.75mm两种，其抗张强度分别不小于3000kg和1800kg，吊线用热塑性涂料涂敷，以防钢丝锈蚀。

对于没有编程过plc程序的小伙伴来说，plc编程是个麻烦，还是个烦……但是真就这么难吗？真相是没有掌握方法，我们来看这个编程案例，就知道是怎么回事了。给大家按步骤逐一解答，如果你对这个的程序有疑问，可以在下面留言，小编会解答的哦。根据下图的三相交流电动机正反转控制的主电路，设计一个PLC控制电动机正停反的控制系统。控制要求如下：正常情况下，按启动按钮SB1，电机正转，按下反转启动按钮SB2，电机反转。

　　MI电缆具有良好的耐火特性且可以长期工作在250℃高温之下，同时还有防爆、耐腐蚀性强、载流量大、耐辐射、机械强度高、体积小、重量轻、寿命长、无烟的特点。但价格贵、工艺复杂、施工难度大，在油灌区、重要木结构公共建筑、高温场所等耐火要求高且经济性可以接受的场合，可采用这种耐火性能好的电缆。

　　装修装璜用电线选用小常识：照明用线选用1平方至1.5平方毫米，插座用线选用2.5平方毫米，空调用线不得小于4平方毫米，建议选用4平方毫米甚至以上。接地线选用黄绿双色线，接开关线选用红、黄、蓝、绿、黑等任一种。
　　煤矿用阻燃信号电缆(现统称煤矿用阻燃通信电缆)MHYVR（PUYVR）：聚乙烯绝缘聚氯乙烯护套矿用信号电缆，用于矿场作普通信号传输，可移动使用。MHY32（PUYV39-1）：聚乙烯绝缘钢丝铠装聚氯乙烯护套煤矿用信号电缆，用于平巷或竖井或斜井作信号传输。


　　使用特性：工作温度：—般型不超过70℃型号后带105的高不超过105℃额定电压Uo/U：450／750V址低环境温度：固定敷设－40℃;非固定敷设－15℃小弯曲半径：无铠装层电缆应不小于电缆外径的6倍带铠装层电缆应不小于电缆外径的12倍。

　　使用特性：工作温度：—般型不超过70℃型号后带105的高不超过105℃额定电压Uo/U：450／750V址低环境温度：固定敷设－40℃;非固定敷设－15℃小弯曲半径：无铠装层电缆应不小于电缆外径的6倍带铠装层电缆应不小于电缆外径的12倍MHYA32(HUYA32)镀锌钢丝铠装、阻燃聚氯乙烯护套通。

The cable is insulated by full-chromatograph solid polycondensation. The insulated wire is twisted into a pair of twisted wires. Suitable material of cable core is added to the cable core, and the plastic coated aluminum band shielding layer and the black outer expansion sleeve with the length mark in the counting order can be completed. Junction wire: solid annealed copper wire. Copper wire diameter is 0.32, 0.4, 0.6, 0.8 (mm).

回顾近年的事件，误判断、误短接的事件频频发生：笔者多次听闻误短接运行开关回路的事件，误短接热备用中的发电机出口开关合闸回路端子造成发电机“变电动机”运行的事件有之，误短接运行中的GIS开关跳闸回路导致开关无保护跳闸的事件有之……电工培训漫天飞的时代，我们却不禁陷入深深的思考：我们培训的基本目标是什么？从近年发生的事件来看，很多事件基本是因为违章、违规、误操作造成，而根源却是安全意识的缺失和质疑精神的缺位。

Flame retardant cable, is refers to under specified test conditions, specimen was, after removed test of ignition, flame spread only in a limited range, residual sheep and burning in the finite cable to self extinguishing in the course of time. The fundamental characteristic is that it may burn out and not run in the case of fire, but it can spread fire. Generally speaking, in case of electric wire fire, it can be put in the local scope, not to produce spread, keep other kinds of e, avoid causing greater loss. The meaning of the flame retardant cable: under specified test conditions, samples were, in is removed after the fire, the spread of flame on the sample only in a limited range and the characteristic of self extinguishing, which has the ability of or delay the outbreak or spread of flame.

　　EISC-SS 铜芯聚乙烯绝缘，聚氯乙烯护套二芯绞合屏蔽，总屏蔽阻燃防爆本质安全电缆敷设在室内.电缆沟管道内固定场合。JYPV－1铜芯聚乙烯绝缘聚氯乙烯护套铜丝编织分屏蔽电子计算机电缆。JYPV－2铜芯聚乙烯绝缘聚氯乙烯护套铜丝编织分屏蔽及总屏蔽电子计算机电缆。



　　阻燃通信电缆用途：主要用于传输音频、150kHZ及以下的模拟信号和2048kbit/s及以下的数字信号。在一定条件下，也可用于传输2048kbit/s以上的数字信号。适用于矿山、电厂、市内、近郊及局部地区。

　　生产规格：对数5对—3600对导体直径为：0.4、0.5、0.6、0.7、0.8（mm）电缆对数型号（0.4）型号（0.5）型号（0.6）5对HYA5x2x0.4HYA5x2x0.5HYA5x2x0.610对HYA10x2x0.4HYA10x2x0.5HYA10x2x0.620对。