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低压橡套软电缆适用于交流额定电压750V及以下家用电器、电动工具和各种移动式电器设备用其中分为轻型、中型和重型三种型号电缆。它分为固定布线用护套电缆、2芯或多芯屏蔽和非屏蔽软电缆、软电缆（软线）等主要用于家庭电路布线、监控用线、供电电源线、家电电器用连接线。
Low smoke and low halogen flame retardant control cables are suitable for the use of ac rated voltage 450/750v and below control, monitoring circuit and protection line with certain environmental protection requirements. Operating conditions (1) rated voltage U0/U is 450/750v; (2) the cable conductor allowed to work at 70 ℃ for a long time; (3) the cable temperature under installation should not below 0 ℃, allowed bending radius; recommended by (4) the cable without armor layer shall be no less than 6 times the outer diameter of the cable; (5) the cable with armored or copper belt shielding structure shall be no less than 12 times the outer diameter of the cable; (6) the soft cable with shield layer structure shall be no less than 6 times of the cable. Technical requirements for 20 ℃ dc resistance conductors shall comply with the terms of GB9330.1 insulation resistance are shown in table 3 - table 6. The fire retardant performance test of the cable conforms to the provisions of GB/T18380. If the user does not require it to meet the requirements of class C fire retardant. The cable smoke concentration shall comply with the provisions of GB/T17651, and its light transmittance shall be 60%. The halogen content should not exceed 100 mg/g. Other performance requirements are the same as GB9330.
The shielding layer can not only restrain the electromagnetic wave from transmitting, but also act as a channel for short-circuit current, which can protect the neutral core. 6/10 kv dedicated cable frequency conversion motor, considering the cables, external force is often in the process of using radial outside the cable shielding layer increased galvanized steel tape armoured layer (between shielding layer and steel tape armoured layer of sleeve).
二、耐火电缆耐火电缆用途：本产品适用于高层建筑、油田、电站、电厂、矿山、化工、矿井、地铁等要求防火条件较高的高的场合，也是应急电源、消防泵、电梯通讯信号系统的应备电缆；该产品具有阻燃耐火电缆耐火能力，在经受火焰直接燃烧情况下，在一定时间内（不小于3h）不发生短路和断路故障，确保继续供电以维持照明和传。
1. Product implementation standard: gb9330-88 (refer to IEC227, better voltage resistance than IEC227), ga306-2001 (flame retardant type). 2. Purpose: this product is applicable to control, signal protection and measuring lines with rated voltage of 450/750v and below under dc and ac 50hz-60hz. 3, product specifications and scope: product specifications range using occasions KYV, KYVP, KYVP2 0.5 - was 10, 2-61 core is the product high insulation resistance, waterproof properties is strong, good cold resistance, suitable for weak current control system or strong electromagnetic interference zone. KYV20,KYV22 0.5-10mm2,4-61 core FYV30,KYV32 0.5-10mm2,7-61 core KYVR 0.5-6mm2,2-61 core KYVRP 0.5-4mm2,2-61 core KYVP22, kyvp2-22 1.5-10mm2,4-61 core note: model pre-flame retardant is suitable for fire retardant environment. 4, using features: cable temperature under installation should not below 0 ℃, the cable conductor long-term allowed working temperature is 70 ℃. The allowable bending radius of the cable: for the armored cable, it should not be less than 6 times the outer diameter of the cable. For the cable with armored or copper belt shielding structure, it shall be no less than 12 times the outer diameter of the cable. For soft cable with shield layer structure, it should be no less than 6 times the outer diameter of the cable.
今天需要大家注意的，就是大家在选购开关的时候，首先就需要咨询一下卖家，然后告诉他们自己家里面的电路有哪些情况，看看他们是否有符合自己家里面这种电路的空气开关。然后大家再根据开关上面的型号来进行购买。因为电这个东西每家每户是不一样的，这个时候呢，大家也可以咨询一些装修的工人来咨询一下，到底这个安数来怎么进行计算？因为有些地方配置是不一样的，那么用电的等级以及用电的安全也就是不一样了。
带钢丝绳PVC行车控制电缆使用特性:额定电压：U0/U0.6/1KV及以下最高工作温度：70℃最低环境温度：固定敷设-40℃度规格型号为KVVRC3,4,6,8,9,10,12,14,16,18,19×1.0,1.5,2.5,4,6MM2最常用的是：KVVRC10*1.59*116*112*114*。
Flame retardant cables and fireproof cables: the difference between the average person is very easy to confuse the concept of flame retardant cables and fireproof cables, although there are many more flame retardant cable applies to the advantages of chemical enterprise, such as low, low smoke, non-halogen, but in general, fire-resistant cable can replace flame retardant cable, and flame retardant cables can't take place of fire-resistant cable.
1. Rated voltage U0/U: 0.6/1kv. 2. The long term allowable high temperature of the cable conductor is +90 degrees, and the short circuit high temperature is +250 degrees. 3. Installation and laying temperature: greater than or equal to 0 degrees, and the fixed dressing temperature is lower than -10 degrees. 4. The allowable small bending radius of the cable is greater than or equal to 15D(d-cable outer diameter).
Flame-retardant cables are characterized by a delay in the spread of flame along the cable so that the fire does not expand. Because of its low cost, it is a kind of cable widely used in fireproof cable. Under the condition of single cable or into a bunch of laying, cable to know when the spread of flame can be controlled within a certain range, so it can avoid fire spreading combustion and lining major disasters, which cable line of fire prevention level.
Ratedpower-frequencyvoltageU0/U:0.6/1kV.•电缆导体的最高允许长期工作温度（PVC/XLPE）:70℃/90℃.产品型号Table3Typeofproduct型号Type产品名称Nameofproduct适用范围及环境Applicabilityandurro。
• communication cables for transmitting incoming signals; Often laid underground or overhead.
定子的各相激磁电流大小与相对应转子步进情况如本文第一图所示。此时，简化图，A相B相的节距θ0作步距角，转子每次电流各变化一次，每步进θ0/4，即已知步距角的四分之一。一般使用这种细分方法，可以使电流波形能够接近正弦波。此处增加细分步级的细分量，电流能近似正弦波，旋转转矩也能得到正弦波变化。2相步进电机的交链磁通与电流模型如下图所示。电流以角速度ω表示，A相比B相超前（π/2），电流公式如下所示：iA=IcosωtiB=Isinωt激磁磁通在A相与B相交链部分，考虑相位相差π/2，根据上图变成下式：ΦA=ΦcosθΦB=Φsinθ设A相转矩为TA，B相转矩为TB，2相微步进驱动时的合成转矩为T2，考虑最简单模型，令式（T1=NNrI(dΦ/dθ)）中的N=1，Nr=l，则转矩公式如下所示：转子与定子的转动磁场同步，以负载角δ（如前文《PM型电机转矩的产生及负载角》及文《HB型电机的转矩与负载关系》的图中δ）转动，下式成立：θ=ωt-δ将上式3代入式式2，及θ=ωt-δ得下式：即T2为含ω的项消去，δ取一定值，能得到近似正弦波的转矩。
Mining flame-retardant communication cable on October 31, 2002 for coal mining products safety sign certificate, 2003-2005, expanded AnBiao product certification scope for many times, MHYAV, MHYA32, MHYV, MHY32, MHYVP, MKVV, MKVV22, MKVV32 and various types of products are got AnBiao certificate. Quansu power cables, control cables issued by the state production license, municipal cable information industry department
ZR-VV-阻燃，硬动力电缆，不易弯曲，适用于固定敷设。 VV-不阻燃，硬动力电缆，不易弯曲，适用于固定敷设。 ZR-VV-阻燃，硬动力电缆，不易弯曲，适用于固定敷设。安防工程、监控工程、弱电系统工程、综合布线、银行监控工程、网络工程、消防工程、远程三表抄送、楼宇防盗监控、门禁可视对讲等专用音视频信号电线电缆。
1、产品名称：自承式控制电缆KVVRC行车控制电缆2、型号：KVVRC、KVVPRC、KVVP2RC、KVVRPRC3、产品说明：型号名称KVVRC自承式铜芯聚氯乙烯绝缘聚氯乙烯护套行车控制电缆KVVPRC自承式铜芯聚氯乙烯绝缘聚氯乙烯护套编织屏蔽行车专用电缆KVVP2RC自承式铜芯聚氯乙烯绝缘聚氯。
6KV及以上电缆接头：①安装电缆终端头时，必须剥除半导体电屏蔽层，操作时不得损伤绝缘，应避免刀痕凹凸不平的情况，必要时用砂纸磨平；屏蔽端部应平整，并要把石墨层（碳粒）清除干净。②塑料绝缘电缆端头铜带屏蔽和钢铠必须良好接地，对短路也遵循这项原则，避免三相不平衡运行时钢铠端部产生感应电动势，甚至“打火”及燃烧护套等事故。