HJYV/SA成束阻燃型聚乙烯绝缘、聚氯乙烯护套、呼叫通信电缆。HJYVP/SA成束阻燃型聚乙烯绝缘、聚氯乙烯护套、编织总屏蔽呼叫通信电缆。HJYVP2/SA成束阻燃型聚乙烯绝缘、聚氯乙烯护套、铜塑复合带绕包总屏蔽呼叫通信电缆。
KYJVP铜芯聚氯乙烯绝缘聚氯乙烯护套控铜线编织屏蔽控制电缆。KYJVRP铜芯聚氯乙烯绝缘聚氯乙烯护套控铜线编织屏蔽控制软电缆。KYJVP2铜芯聚氯乙烯绝缘聚氯乙烯护套铜带屏蔽控制电缆。KYJVRP2铜芯聚氯乙烯绝缘聚氯乙烯护套铜带屏蔽控制软电缆。
二、电缆的型号、名称和用途序号型号名称使用范围1ZR-VVZR-VLVZR-VYZR-VLY阻燃聚氯乙烯绝缘阻燃聚氯乙烯/聚乙烯护套动力电缆敷设在室内、隧道及管道中，电缆不能承受机械外力作用ZR-VV22ZR-VLV22ZR-VV23ZR-VLV23阻燃聚氯乙烯绝缘阻燃聚氯乙烯/聚乙。
Such a cable structure features: type manufacuring HYA communication cable chromatography used in high-density polyethylene polythene insulation, lu: su composite sheath (namely cable is applied to longitudinally wrap shielding ribbon and sheath bonded into an organic whole, forming sealing protection layer), has a superior electrical properties, the characteristics of the construction is convenient. Such a cable main electrical properties: 1. The dc resistance: 20 ℃, 0.4 148 or less? / km 0.5 95.0 or less? / km 0.6 65.8 or less? / km 0.8 36.6 or less? / km2. Insulated electrical strength: 1 min 1 kv no breakdown between the conductor and conductor shielding 1 min 3 kv is not breakdown (3) insulation resistance: each conductor and the rest of the grounding wire core, inflatable cable is more than 10000 m Ω. Km, filling type cable is more than 3000 m Ω. Km. 4. Working capacitance: average value: 52 + / -2nf /km5
This product is suitable for electronic computers with rated voltage of 500V and cables with high requirement of anti-interference. Type K B low density polyethylene with anti-oxidation property is adopted for insulation of cable core. Polyethylene high insulation resistance, good resistance to voltage, small dielectric coefficient and temperature and the influence of variable frequency dielectric loss is small, can not only meet the requirements of transmission performance, and can ensure the service life of the cable. In order to reduce crosstalk and external interference between circuits, the cable adopts shielding structure. The shielding requirements of cables are respectively adopted according to different situations, such as the method of shielding the hinged combination, the method of shielding the hinged combination, and the method of shielding the hinged combination after the hinged combination. Shielding materials are round copper wire, copper belt, aluminum belt/plastic composite belt three. Shielding pair and shielding pair have good insulation performance. If there is potential difference between shielding pair and shielding pair, the signal transmission quality will not be affected.
中间继电器和接触器的差异继电器之所以冠上了“中间”两个字，可以理解成它并不是用来实现最终控制的，而是起到一个中间环节的转接作用，“继”就是继接状态的意思了。所以中间继电器并没有所谓的主触点和辅助触点的说法，它的目标是让小电流变成稍微大一点的电流，甚至还继续保留原来的小电流，而只利用了触点的隔离功能。从这个角度而言，继电器会设计很多组常开和常闭触点，触点越多，能用来联锁其他继电器或者接触器的可能性会越高，逻辑的花样会越复杂，越能满足工业控制需求。
产品名称型号规格及范围：塑料绝缘和聚氯乙烯护套铁路信号电缆PTYAH,;PTYA;PZYA;PTYV;PTYY,;PTY22;PTY23;（PZY02;PZY03;PZY23PZY22）1/0.8mm（1/1.0mm）2-48芯适用于额定电压交流500V或直流1000V及以下的铁路信号联络、火警信号。
具有较高的熔融温度，适宜的粘度和良好的低温韧性；热稳定性和抗水性优异；电绝缘性能强、损耗小，与电缆内外护套的相容性好，是一种优良的加热应用型电缆填充复合物。综合布线、安防工程、监控工程、弱电系统工程、银行监控、网络工程、音响工程、远程三表抄送、消防工程、楼宇防盗监控、门禁可视对讲等专用、音、视频电线电缆。
ˎ̥RVV电缆全称铜芯聚氯乙烯绝缘聚氯乙烯护套软电缆，又称轻型聚氯乙烯绝缘聚,俗称软护套线，是护套线的一种。RVV电线电缆就是两条或两条以上的RV线外加一层护套。RVV电缆是弱电系统最常用的线缆，其芯线根数不定，两根或以上，外面有PVC护套，芯线之间的排列没有特别要求。
型号产品名称敷设场合及要求芯数标称截面mm2导体长期允许工作温度℃245IEC81(YH)高强度橡套电焊机电缆用作电焊机二次侧接线及连接电焊钳的软电缆116～9565YH天然胶护套电焊机电缆用作电焊机二次侧接线及连接电焊钳的软电缆110，120～18565245IEC8。
适用于市内、近郊及局部地区架空或管道敷设线路中，也可直埋。在一定条件下，也可用于传输2048kbit/s以上的数字信号。适用于市内、近郊及局部地区架空/管道敷设线路中也可以直埋。最高传输频率分别为30MHz与100MHz。
IA-DJVP3VP3 IA-DJYP3VP3 IA-DJYJP3VP3 本安型、铝塑复合膜分对屏蔽、总屏蔽 。IA-DJVPVR IA-DJYPVR IA-DJYJPVR 本安型、编织分对屏蔽（铜丝或镀锡丝）软结构。
使用外加电阻的驱动：步进电机的绕组使用粗导线时，线圈电阻Rw值很小，如下图所示。在各相线圈中，串联外部电阻R，为的是限制绕组流过的电流小于额定电流I。限制绕组流过电流的方法，可采用降低电源电压和串联外部电阻R的两种方法。假设步进电机的线圈电感为L，绕组电阻为Rw电气时间常数为τ，外加电阻R时，电气时间常数公式如下：外加电阻使时间常数τ变小，电流上升比较快，从而使步进电机的驱动脉冲频率变快，上图所示为无外部电阻与带外部电阻R的电流上升曲线的比较，t1时刻，没有电阻R时，电流只上升到I1，有电阻R时，电流上升到I2，使高速时的转矩得到很大的改善；缺点是铜耗增大。
主要技术参数：环境温度：-40℃~+65℃大气压力：70～106KPa相对温度：≤95％任意两端及任一端子与接地之间的绝缘电阻>5×104ΜΩ。任意两端及任一端子与接地之间在接通1000V交流时，1min应无击穿或飞弧现象。
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
10KV及以下电缆平行安装时，相互净距不小于0.1m，10-35KV不小于0.25m；交叉安装时距离不小于0.5m。电缆敷设温度不低于0℃，弯曲半径：多芯电缆≥15(D+d)，单芯电缆≥20(D+d)，（D为电缆外径，d为导体外径）。
说的通俗些铠装电缆也就是地埋的电线电缆，动力线传输电能电缆加上铠装层的目的除了增强抗拉强度、抗压强度等机械保护延长使用寿命外，铠装的有一定的抗外力性能，还可以放一些老鼠撕咬，不至于透过铠装造成电力传输问题，铠装的弯曲半径要大，铠装层可以接地保护电缆动力铠装电缆：型号有：VV22、VVR22、VVP2。