7、自承式电缆：采用8字形挤出模具，对自承钢索与铝塑纵包缆芯同时挤塑。 8、铠装（适用于铠装电缆23、22、53型）；在综合护层外绕包两层镀锌钢带（适用于23、22型电缆）或纵包一层涂塑钢带（适用于53型电缆）。
It is composed of different material conductors in metal sleeves with insulating materials, which are processed into a flexible solid assembly.
阻燃型产品在型号前加“XX—"，用阻燃“Z、ZR、ZA、ZB、ZC、ZRA、ZRB、ZRC、ZBN、ZCN、ZAN、ZN、ZRN"，低烟低卤阻烟“ZL、ZD、"，低烟无卤阻燃“ZW、ZDW、ZLW、ZWD、ZRD、ZRW",表示铠装型产品在产品的型号后下角加“—XX"，用钢带铠装“22、29"、细钢。
Flame-retardant cable classification: according to the different flame-retardant materials of cables, flame-retardant cables are divided into halogen flame-retardant cables and halogen-free low-smoke flame-retardant cables. Which contain halogen flame retardant cable insulation, sheath, outer sheath and auxiliary material (package belt and filling) in whole or in part by polyethylene (PVC) containing halogen flame retardant material, thus has good flame retardant properties. However, when the cable burns, a large amount of smoke and haloic acid gas will be released. Haloic acid gas is corrosive to the surrounding electrical equipment. When the cable burns, it will cause harm to the surrounding electrical equipment and rescue personnel, which is not conducive to the fire fighting and rescue work, thus causing serious "secondary hazards". All or part of the insulation layer, protective sleeve, outer protective layer and auxiliary materials (packing belt and filling) of the halogen-free low-smoke flame-retardant cable are adopted
23，22型采用双层钢带绕包也有相似的性能。3、铠装通信电缆护套：黑色高分子量低密度聚乙烯或聚氯乙稀护套。护套厚度可取决于基本电缆外径。5、铠装通信电缆标记内容有：导线直径、线对数量、电缆型号、长度、制造厂厂名代号及制造年份。
每次测量前必须调零，换欧姆挡后也要调零。被测电阻不能带电，若电路有电容器，应先将电容器放电。c。测大电阻时，不能用手接触导电部分，否则会给汲J量结杲带来严重误差。d。万用表的电流是从“—”端流出的，即“—”端为内附电池的正极，“＋”端为内附电池的负极。e。测晶体管电阻时应将测量量程放在R×100或R×1k挡。若用R×1或R×10挡测量可能会烧坏晶体管，若用R×10k挡测量，则有可能会击穿晶体管。
屏蔽材料有圆铜线，铜带、铝带/塑料复合带三种。屏蔽对与屏蔽对具有较好的绝缘性能，电缆在使用中若屏蔽对屏蔽对之间出现电位差时，不会影响信号的传输质量。用途：，本产品选用介点常数小的高压聚乙烯绝缘。例如：ZR-DJYPVZR-DJYPVP等（2）铠装型（钢带铠装）电缆需在型号右下角加代号“22”例如：DJYPV22DJYPVP22等。
5、生产范围型号额定电压V芯数标称截面mm2227IECRV300/50010.3-10450/75011.IECRVB300/30020.IECRVS300/30020.3-0.25227IECRVV300/3002-300.5-6.。
相关产品如下： 2.矿用阻燃信号电缆MHYV（PUYV）MHYVR（PUYVR）MHYVP（PUYNP）MHYVRP（PUYVRP） MHY32（PUYV32）MHYV（1-10对）MHYAV（5-100对）MHYA。
二、产品执行标准Q/AT2003-4三、基本型号及名称型号名称铜芯Cu铝芯ALWFYS-YJYWFYS-YJLY铜芯(铝芯)交联聚乙烯绝缘无毒无害防蚁鼠聚烯烃护套电力电缆WFYS-YJY23WFYS-YJLY23铜芯(铝芯)交联聚乙烯绝缘钢带铠装无毒无害防蚁鼠聚烯烃护套电力电缆WFYS。
DJYP2V铜芯聚乙烯绝缘，对绞铜带屏蔽，聚氯乙烯护套电子计算机电缆DJYP3V铜芯聚乙烯绝缘，对绞铝／塑料薄膜复合屏蔽，聚氯乙烯护套电子计算机电缆DJYP2VP2铜芯聚乙烯绝缘，对绞铜带屏蔽，铜带总屏蔽聚氯乙烯护套电子计算机电缆DJYP3VP3铜芯聚乙烯绝缘，对绞铝／塑料薄膜复合屏蔽。
|MHYV mine cable |MHYVR mine cable |MHYVP mine shielded cable |MHY32 mine cable |MHYVRP mine shielded cable | mine monitoring cable? Mining cables, suitable for transmission in mines, can be used or fixed. ? Fire retardant cable for mine (now referred to as fire retardant communication cable for coal mine)? 1. Product adoption: mt818-1999? MHYVR (PUYVR)? (1 x 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 x 2?) Polyurethane polyurethane sheathed mine cable for general transmission in mine. ? MHY32 (puyv39-1)? (1 x 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 * 2) 1/1.0, 1/1.38 poly-insulated steel wire armored poly-chloride sheath coal mine cables are used for transmission in roadway or shaft or inclined shaft. MHYV (PUYV) (1 times 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 * 2) 1/1.0, 1/1.38 polyurethane polyurethane sheath coal mine cables are used for general transmission in mines and are suitable for fixed installation. MHYVRP? 7/0.30, 7/0.37, 7/0.43, 7/0.52 (1 ~ 10 pairs, 1 x 4) polyinsulated copper wire braided shielding PVC sheathed coal mine cables, used for transmission in places with large electric fields. ? MHYVP? (1 x 2? 1 x 4? 2 x 2? 3 x 2? 4 x 2? 5 x 2? 6 x 2? 8 x 2? 10 x 2?) * 7/0.30, 7/0.37, 7/0.43, 7/0.52 poly-insulated PVC sheathed coal mine cables, used for transmission in places with large electric fields and for fixed laying. ?
只有鼠笼型电机才采用星三角启动。星三角启动的注意事项启动器的接线应正确；电动机定子绕组正常工作时应为三角形接线。手动操作的星三角启动器，应在电动机转速接近运行转速时进行切换；自动转换的启动器应按电动机负荷要求正确调节延时装置。启动器触头压力应符合产品技术文件规定，操作应灵活。启动器应垂直安装，安装必须牢固。安装位置要便于操作和维修。新安装的油浸式星三角启动器要灌入合格的绝缘油。在灌油前，应将启动器内及油槽内清扫干净，油槽内应干燥无水分。
该电缆主要用于交流或直流300V以下的工作系统，在500V及以下时仍能正常工作。MHYV煤矿用聚乙烯绝缘聚氯乙烯护套通信电缆用于矿场作普通信号传输，适用于固定敷设。MHYAV煤矿用聚乙烯绝缘铝-聚乙烯粘结护层聚氯乙烯护套通信电缆用于较潮湿的斜井和斜巷。
屏蔽结构的设计1.8／3千伏及以下变频电机专用电缆的屏蔽一般采用总屏蔽，6／10千伏变频电机专用电缆屏蔽由分相屏蔽和总屏蔽构成，分相屏蔽一般可采用铜带屏蔽或铜丝铜带组合屏蔽。总屏蔽结构可采用铜丝铜带组合屏蔽、铜丝编织屏蔽、铜带屏蔽、铜丝编织铜带屏蔽等，屏蔽层截面与主线芯截面按一定比例。
用途：耐火电缆广泛应用于高层建筑、地下铁道、地下街、大型电站及重要的工矿企业等与防火安全和消防救生有关的地方，例如，消防设备及紧急向导灯等应急设施的供电线路和控制线路。 2.电缆敷设安装允许弯曲半径非铠装电缆应不小于电缆外径的10倍；铠装电缆应不小于电缆外径的15倍。
|MHYV mine cable |MHYVR mine cable |MHYVP mine shielded cable |MHY32 mine cable |MHYVRP mine shielded cable | mine monitoring cable?