扬声驱动器：高性能HAV电缆设计与应用优势
RS-485电缆信号线特性阻抗120欧姆，导体为2*2*24AWG多股镀锡电解铜丝绞合而成，花色绝缘护套宜于安装识别，铝箔/聚酯带总体****屏蔽，附加独立多股绞合镀锡铜丝接地导体，工业灰色PVC外护套，外护套颜色可选。
矿用通信电缆适用于煤矿管网的管道铺设，主要用于管道敷设。在缆芯中和屏蔽层的内外表面用石油膏填充或浇注处理，以防止煤矿中水分侵入。在煤矿常见的30~C一60~C的环境条件下，煤矿用通信电缆的机械和电气性能保持不变。用于平巷、斜巷及机电硐室做通信线以及用于平巷，竖井或斜井作主信号传输。
MHYV电缆、煤矿用通信电缆、煤矿用信号电缆、煤矿用通讯电缆、MHY32电缆、PUYV电缆，MHYVP电缆、MHYVR电缆、阻燃煤矿用通信电缆 、矿用监测电缆、PUYVR电缆、矿用电话线、矿用监控电缆\矿用电话电缆。
执行标准：企标Q/TX002-2006 本标准适用于煤矿用铜芯聚乙烯护套固定和移动类通信阻燃电缆。
煤矿用阻燃通信电缆……mh 聚乙烯绝缘……Y 铜质线芯……省落 铝-聚乙烯粘结护层……A 聚乙烯内护层……省落 铜丝编织铠装……B 蓝阻燃聚氯乙烯护套……V 钢丝铠装蓝阻燃聚氯乙烯护套……32 铜丝编织屏蔽……P 软质线芯……R 符合：MT386-1995《煤矿用阻燃电缆阻燃性的试验方法和判定规则》及Q/TX 002-2006 《煤矿用阻燃通信电缆》
型号：ZRC-HYAT阻燃通信电缆，WDZ-HYAT无卤阻燃通信电缆，ZR-HYAT阻燃通信电缆，MHYAT矿用通信电缆技术特点：防火阻燃低损耗低色散结构紧凑良好的综合机械性能应用范围：适用于矿山、电厂、市内、近郊及局部地区，起到防火阻燃作用。
2电缆名称、型号及规格产品名称、型号及规格煤矿用聚氯乙烯绝缘聚氯乙烯护套控制电缆MKVV 450/750V 10mm2(2~10芯)MKVV 450/750V 4~6mm2(2~14芯)MKVV 450/750V 。
IKO轴承的安装和拆卸用干净的煤油或汽油将轴承和与之相配的相关零件清洗干净；检查准备使用的轴承是否与原型号相符，与之相配的零件尺寸是否合格；用专用的装配工具套筒将轴承压入，工具套筒直径不能超过轴承挡边的外径，装配时用力要均匀，切勿冲击和野蛮装配；轴承安装完毕后应转动轴承及相关部件，查看是否有卡滞现象和异常噪声；按主机部件的要求注入指定的润滑脂或润滑油；在装配大型轴承和轴承与轴、座孔之间盈量较大的产品时必须对IKO轴承进行油浴加热，油温度在8摄氏度左右；轴承拆卸时，必须使用拉拔类专用工具，严禁用铁。
注：ZR-阻燃G-隔氧层NH-耐火阻燃电力电缆按GB1270《额定电压35kV及以下铜芯、铝芯塑料绝缘电力电缆》标准生产，还可根据用户需要按国际电工委员会推荐标准IEC、英国标准、德国标准及美国标准生产。
矿用通信电缆结构：1、导线：退火裸铜线，铜线直径为0．30，0．42，0．52，0．60，0．70，0．80，0．90(mm)。 2、绝缘材料：高密度聚乙烯或聚丙烯，按照全色谱标准标明绝缘线的颜色。 3、绝缘线对：把二根不同颜色的绝缘线按不同的节距扭绞成对，并采用规定的色谱组合以便识别线对。 4、通信电缆缆芯结构：以1对为基本单位，超过25对的电缆按单位组合，每个单位用规定色谱的单位扎带绕扎，以便识别不同的单位。100对及以上线对的电缆加有1％的预备线对，但最多不超过6对。缆芯内的间隙用石油膏填充。 5、缆芯包带：用聚脂薄膜带绕包。 6、屏蔽：铜丝屏蔽或用轧纹(或不轧纹)金属带，金属带纵包于通信电缆缆芯包带之外。 7、护套：蓝色低密度聚乙烯。也可提供双层护套的通信电缆。
—使用特性1.标称特性阻抗：120Ω2.1kHz时的标称电容(导体-导体)：42nF/km3.1kHz时的标称电容(导体-导体&屏蔽)：75.5nF/km4.20℃时导体的直流电阻：≤90.9Ω/km5.标称传播速度：66%6.标称延迟时间：5.25ns/m7.1MHz时的标称衰减：19.7dB/k。
Flame retardant grade: D for fire temperature: 815 ℃ or higher for fire time: 20 min into a bundle of cable laying nonmetallic material volume: acuity 0.5 litres/m carbonized height: 2.5 meters or less self-extinguishing time: 1 h or less.
煤矿屏蔽电缆MHYVP煤矿用阻燃屏蔽通信电缆MHYVP;MHYVRP,煤矿用阻燃通信电缆;MHYVRP;MHYVP,煤矿用阻燃屏蔽通信电缆MHYVP;MHYVRP的详细信息!煤矿用阻燃屏蔽通信电缆MHYVP;MHYVRP屏蔽煤矿用信号电缆MHYVP 1×2 1×4 2×2 3×2 4×2 5×2 ×7/0.28 0.3屏蔽煤矿用信号电缆MHYVP 1×2
1×4 2×2 3×2 4×2 5×2 ×7/0.28 0.3煤矿用信号电缆（屏蔽信号电缆）
保护器：测电阻值；正常为零；轻度超载后能自自动动复位，过大时将**失效。遇高温也可使其断开(热保护器)，常温后也可自动复位。、整流桥：将输出端(＋，－)短路，测输出端(＋，－)直流电阻(15K左右)。、正反开关：拨动键所对应的引脚为公共脚，拨动键所对应的两档相通。电路检测分析当拿到一支故障原因不明的电批后，应先作初步检测，具体如下：将万用表拨至(1K)档调零，打开(按下)微动开关，测输入端直流电阻，正情况下为15K左右(数字型万用表调至测二极管处，显示压降为1。
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 requirements 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.