2、产品标准：GB5023.5-86《额定电压450/750V及以下聚氯乙烯绝缘电缆（电线）屏蔽电线》3、使用特性：1）额定电压U0/U为300/300V；2）电缆的长期允许工作温度：AVP-105、RVP-105型……应不超过105℃；其他型号……应不超过70℃4、型号、名称和使用范围型号名称。
使用特性1、电缆额定工作电压：450／750V、600／1000V。
2、电缆导体的长期工作温度：70℃。
3、电缆敷设时环境温度应不低于0℃。
4、最小弯曲半径：非铠装电缆：阻燃型为电缆外径的6倍，铠装型电缆：为电 缆外径的20倍。
HYA22：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢带铠装聚氯乙烯护套市内通信电缆。
HYA23：铜芯实心聚烯烃绝缘挡潮层聚乙烯护套钢带铠装聚乙烯护套市内通信电缆。
HYAT22：铜芯实心聚烯烃绝缘填充式挡潮层聚乙烯护套钢带铠装聚氯乙烯护套市内通信电缆。
（1）、低烟无卤电缆的阻燃等级根据GB/T规定的试验条件,低烟无卤电缆的阻燃等级分为A、B、C、D四个等级表1阻燃等级供火温度供火时间成束敷设电缆的非金属材料体积炭化高度自熄时间A≥815℃40min≥7升/米≤2.5米≤1hB≥815℃40min≥。
Purpose of HYAT solid insulated filled cable: solid insulated filled cable is suitable for the urban telecommunication line of the local telecommunication network in the town of wuyu, and also for the special network line connecting to the public network. Mainly used for pipeline laying. The inner and outer surfaces of the cable core and the shield layer are filled with oil paste and poured to prevent water intrusion. The mechanical and electrical properties of the cable remain unchanged under conditions of 30~C - 60~C. Structure: wire: annealed bare copper wire, copper wire diameter 0. 32, 0. 40, 0. 50, 0. 60, 0. 70, 0. 80, 0. 90 (mm). Insulating material: high density polypropylene or polypropylene, colour of the insulated wire as indicated by full chromatograph. Pair of insulated wires: twist two different colored insulated wires into pairs at different pitch and use the specified chromatographic combination to identify pairs. Core structure: with 25 pairs as the basic unit, more than 25 pairs of cables are assembled according to the unit, each unit is wired with the unit of specified chromatogram to identify different units. 100 pairs of cables with more than one pair of cables plus 1% of the reserve pair, but not more than 6 pairs. The gap in the core is filled with oil paste. Core tape: wrap with a polygrease film tape. Shielding: metal strip with or without striping, which is longitudinal wrapped outside the core of the cable. Sheath: black low density polymer. Double sheathed cables can also be provided. Identification and marking: cable outer surface sexual identification mark, mark at no more than alternate 1 m intervals, tag contents are: the diameter of wire, line number, cable type, factory name and year of manufacture, marking at no more than alternate 1 m intervals to mark on the surface, but with the tag stagger. Other structures: according to the needs of users, we can provide armored cables HYAT53, HYAT55 and high frequency isolation cables YATG with strengthened mechanical protection layer.
两者的区别有刷电机电机工作时，线圈和换向器旋转，磁钢和碳刷不转，线圈电流方向的交替变化是随电机转动的换相器和电刷来完成的。
无刷直流电机由电动机主体和驱动器组成，是一种典型的机电一体化产品。
由于无刷直流电动机是以自控式运行的，不会象变频调速下重载启动的同步电机那样在转子上另加启动绕组，也不会在负载突变时产生振荡和失步。
有刷电机是传统产品，性能比较稳定。
无刷电机是升级产品，其寿命性能比有刷电机好。
但其控制电路比较复杂，对元件的老化筛选要求比较严格。
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。
MHYV mine resistance net line MHYV mine net line 4*2*0.5,MHYV mine net line 4*2*0.8 standard 568A:
Signal cable for mining is a signal transmission tool. General signal cable transmission signal is small, in order to avoid the interference signal, signal cable with a layer of shielding layer, outside package of conductor shielding layer, generally for conductive cloth, woven or copper (aluminum), the bronze shield to ground, external interference signal can be the layer into the earth, and avoid interference signals into the inner conductor interference at the same time reduce the wastage of the transmitted signal.
Correction factor 1.12 1.06 1.00 0.94 0.87 0.79
Purpose: this product is used for computer and automatic e connection cable, it has anti-interference, signal attenuation small performance. Common type, cold - resistant type, etc. 2. Product standards: three sql22 Q / . The main models: JVV - PVC insulated and sheathed computer cable JVPV - PVC insulated and sheathed cable shielding computer JVV - NH - PVC insulated and sheathed hardy computer cable JVPV - NH - PVC insulated and sheathed cable shielding hardy computer JFV - fluorine plastic insulation special composite plastic sheath heat-resistant computer cable JFVP - fluorine plastic insulation special composite plastic sheath cable shielding heat-resistant computer four. Section: 5. Logarithm: 1 ~ 61 pairs.
HYAT23 armoured 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 vulnerable to erosion area and design of 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.
费时费力费料无论是水还是电，点位大多数还是在墙壁的中下部。
这意味着，如果水电在顶部，我们需要在墙壁上开一道长长地槽，将水电管道引下来。
这样一来，路程长了、工程量大了、耗时长了、用料多了——钱，花的也就多了。
开槽问题地面布线时，由于地上有一层不小于50mm的抹灰层，我们可以任意开槽——甚至可以不开槽，将来利用地板进行遮挡。
天花板走管，你想怎么隐蔽管线？开槽肯定是不行的，天花板上没有抹灰层，开槽就会伤害楼板。
可采用任何一种方式敷设，更适于岩石地区的敷设。
通信电缆型号HYAHYACHYATHPVVHYVHJVVHYY。
配线电缆型号HPVVZR-HPVV。
局用电缆型号HJVVHJVVPZR-HJVVZR-HJVVP。
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。
特别适用于500KV及以下的发电厂，变电站控制线路。
采用塑料绝缘特种屏蔽控制电缆可抑制外界电、磁场的干扰。
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。
耐火电缆使用条件1.交流额定电压：U。
/U（V系列：600/1000V，K系列：450/750V，B系列：450/750V）。
2.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，HYA电缆大于10000MΩ.km,HYAT电缆大于3000MΩ.km。
4.工作电容：平均值52±2nF/km5.远端串音防卫度：150kHZ时指定组合的功率平均值大于69dB/km。