沙湾矿用低烟无卤软电缆WD-MKYJYRP暖意



沙湾矿用低烟无卤软电缆WD-MKYJYRP暖意
低烟无卤电缆,是指不含卤素(F、Cl、Br、I、At)、不含铅镉铬汞等环境物质的胶料制成,燃烧时不会发出有毒烟雾的环保型电缆。
低烟无卤电缆基本概述:● 其中卤素指针为:所有卤素的值≦50PPM(根据法规PREN 14582)● 燃烧后产生卤化氢气体的含量<100PPM(根据法规EN5067-2-1)● 燃烧后产生的卤化氢气体溶于水后的PH值≧4.3(弱酸性) (根据法规EN-50267-2-2)● 产品在密闭容器中燃烧后透过一束光线其透光率≧60%(根据法规EN-50268-2)● Pb<90PPM,Cd、Cr6+、Hg、PBBs、PBDEs均小于5PPM
低烟低卤、低烟无卤阻燃电缆特点及用途:本产品适用于交流额定电压450/750V及以下的地铁、高层建筑、商场、剧院、发电站、化学工厂、城市广场及其他公用事业等对电缆阻燃特性要求高的场合。电缆的无卤低烟、低卤低烟特性,当火灾发生时,蔓延速度慢,烟浓度低,可见度高,有害气体释放量小,便于人员撤离。
DJYPV(R)-22钢带铠装聚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。DJYPV(R)P-22钢带铠装聚乙烯绝缘铜丝编织分屏总屏聚氯乙烯护套计算机用屏蔽(软)电缆。DJYV(R)P2-22钢带铠装聚乙烯绝缘铜带绕包总屏聚氯乙烯护套计算机用屏蔽(软)电缆。
Flame retardant performance: under specified test conditions, specimen was burning, after removed test of ignition, flame spread only in a limited range, residual flame or residual burning characteristics of self extinguishing reaction in the limited time.
燃烧气体的腐蚀性小,也避免了对仪器设备的损害,低卤、无卤的特性,使得电缆材料在耐老化和耐紫外线及其它辐照性能大大提高,从而延长电缆的使用寿命。1X9X7/0.43矿用低烟无卤软电缆WD-MKYJYRP
低烟无卤电缆使用特性:1.电缆额定电压UO/U:450/750V,交流聚烯烃UO/U为0.6/1KV2.电缆长期工作温度为:-20℃-90℃,-40℃-105℃3.推荐弯曲半径:无铠装电缆应不小于电缆外径的6倍,有铠装或铜带屏蔽结构的电缆应不小于电缆外径的12倍。
低烟无卤电缆主要技术指标:1.电缆应经受环境温度下工频电压试验3kV,5min不击穿2.电缆的透光率应符合下表电缆外径 D(mm)透光率(%)≥电缆外径 D(mm)透光率(%)≥D>40705<D≤105010<D≤4060D≥540 3.电缆的不延燃性(阻燃特性):应通过GB12666.5-90中B类成束燃烧试验。单根电线电缆垂直燃烧试验应通过GB12666.2-90 4.卤酸气体释放量,符合IEC754-1
5.燃烧气体的PH值和导电率,符合IEC754-2 PH≥4.3 电导率≤10μS/mm。
三相交流电路中,它分为三相对称负载或三相不对称负载电路。另外电功率计算时还要看电器负载是什么性质的负载,其中包括有纯电阻性负载,白炽灯、电炉、电热水器等,它们属于纯电阻性负载,这种电路中的电压与电流是同相位,电压与电流之间的关系,不论用瞬时值、大值还是有效值表示,均符合欧姆定律,但一般计算都用有效值,即I=U/R。纯电阻电路中,电阻性负载的功率因数基本上等于1,电阻元件的功率分为瞬时功率、平均功率或有功功率。
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
Main products are: mine cable MHYV, MHY MHYA32, MHY32, MHYVP, MHYVR, MHYVRP, MKVV, MKVV22, MKVV32, MKVVR, MKVVP etc., all kinds of products are all in the coal Ann mark certificate and complete specifications, the major products are widely used in coal mine and coal mine monitoring and control. The products are used in dozens of coal groups and mines, which have been highly praised.
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低烟无卤电缆代号、名称及含义:项目代号含义系列代号DLDWLDK低烟低卤低烟无卤控制电缆绝缘材料VJEF聚氯乙烯交联聚烯烃丁腈热塑体护套材料VGS聚氯乙烯热固性护套热塑性护套屏蔽材料PP2铜网或镀锡铜网铜带/塑复合带铠装材料2232钢带细钢丝导体种类ABR独股导体7股绞合导体多股绞合导体;生产范围截面(mm2):0.5、1.0、1.5、2.5、4、6、10、16、25。
低烟无卤电缆主要用途:该产品阻燃性能优越,燃烧时烟度甚少,无腐蚀性气体逸出,广泛应用于核电站、地铁车站、电话交换机及计算机控制中心、高层建筑大楼、宾馆、广播电视台、重要军事设施、石油平台等,以及人员较集中,空气密度低的场所。
低烟无卤电线特性:(1) 抗张强度比一般PVC电线大:一般PVC电线抗张强度大于1.05Kgf/mm2,而低烟无卤电线抗张强度大于1.2Kgf/mm2;(2) 具有良好的耐候性(-30℃~105℃);(3) 具备良好的柔软度(硬度为80—90);(4) 具有非移性(因为此产品配方中不用添加可塑剂,故不会有移形性);(5) 燃烧时不会产生有毒黑烟(会产生少量白色烟雾);(6) 具有较高的体积电阻率:PVC电线一般为1012~1015Ω/cm3,低烟无卤电线大于1016Ω/cm3;(7) 具有良好的耐高压特性:PVC电线一般耐10KV以上,而低烟无卤电线高达15KV以上;(8) 具有良好的弹性和粘性。
但是集电极电流的变化比基极电流的变化大得多,这就是三极管的放大作用。IC的变化量与IB变化量之比叫做三极管的放大倍数β(β=ΔIC/ΔIB,Δ表示变化量。),三极管的放大倍数β一般在几十到几百倍。由于基区很薄,加上集电结的反偏,注入基区的电子大部分越过集电结进入集电区而形成集电极电流Ic,只剩下很少(1-10%)的电子在基区的空穴进行复合,被复合掉的基区空穴由基极电源Eb重新补给,从而形成了基极电流Ib。
Flame-retardant cables: • cables used in electrical e for electrical e connection lines, internal or external wiring
我厂专业生产电话线-HPVHYVHPVVHVV4*0.54*0.44*0.64*0.74*0.84*0.94*1.04*1.24*1.5电话线-HPVHYVHPVVHVV4*0.54*0.44*0.64*0.74*0.84*0.94*1.04*1.24*1.5的详细介绍市内通信电缆通信电缆|通讯电缆。

