
This process specification provides for rated voltage 450/750v, single core 1.5-500mm2 PVC insulated or polyolefin insulated flame-retardant fire resistant soft cable; And 0.6/1kv single core 4~500mm2, 2~5 cores 1.5~240mm2 polychlorinated insulated or polyolefin insulated flame-retardant fire resistant flexible cables process specifications, technical requirements, and acceptance rules. The main models of this process specification are: rated voltage 450/750v: za-rv; WDZA - RY, etc. Rated voltage 0.6/1kv: za-rvv, za-rvv22, wdza-ryy, wdza-ryy23, wdna-ryy, wdna-ryy23. 2? Usage characteristics, classification and nomenclature of cables 2.1? Service characteristics 2.1.1 cable rated operating voltage: 450/750v, 600/1000v. 2.1.3 temperature under installation should not below 0 ℃. 2.1.4 small bending radius of cables: unarmored cables: the flame retardant type is 6 times the outer diameter of cables, and the fire resistant type is 12 times the outer diameter of cables; The armored cable is 20 times the outer diameter of the cable. 2.2? The cable type consists of 5 parts: serial code, insulation, sheath material code, outer sheath and performance code.
每个单位都采用规定色谱的扎带绕带100对及以上电缆加有1%的备用线对,但最多不超过10对;8.缆芯包带:缆芯外包覆非吸湿性、非吸油性的绝缘带;9.电缆屏蔽:用轧纹(或不轧纹)双面涂塑铝带纵包于缆芯包带之外,两边搭接粘合;10.电缆护套:黑色低密度、中密度或高密度聚乙烯;11.识别标记:电缆外表面打印。
ZR-BPGGP2硅橡胶绝缘和护套铜带绕包屏蔽耐高温变频电力电缆。
ZR-BPGGPP2硅橡胶绝缘和护套铜丝编织铜带绕包屏蔽耐高温变频电力电缆。
ZR-BPGGP3硅橡胶绝缘和护套铝聚酯复合膜绕包屏蔽耐高温变频电力电缆。
计算机电缆DJVPV,DJVVP,DJYVP,规格型号DJYJVP,DJYPV,DJYJPV,DJVPVP,DJYPVP,DJYJPVP,JVV,JVVPDJYPRV:耐高温-耐油-防腐蚀控制电缆ZR-KFFRKFFRPKFFR22KFFR32-200—260度的详细介绍高温屏蔽软电缆-高温软电缆耐。

(防水)HYAT通信电缆介绍:(直埋/管道/架空)内导体线径(mm):0.40、0.50、0.60、0.70、0.80、0.90对数(对):5—3000宽带型/产品用途:适用于远程光网络单元到用户之间的传输系统,以及大楼布线系统中楼宇间传输的子系统。
35,相电流:三相电路中,流过每相上的电流称为相电流。
线电流:三相电路中,三根端线中的电流称为线电流。
36,损耗电场:把电荷(或带电体)引入其他带电体周围的空间时,将会受到力的作用,就是说在带电体周围存在电场。
37,电场强度:表示电场强弱的物理量。
数值上等于单位正电荷在该点处所受的作用力,方向是正电荷受力的方向。
用字母E表示,单位为V/m。
38,击穿:电介质在电场的作用下发生剧烈放电或导电的现象叫击穿,绝缘强度又称击穿电场强度。
吊线和电缆用同一外护层,经济实用,安装敷设方便HYAC电缆HYAC索道通讯电缆HYAC自承式通讯电话线HYAC钢绞线电缆8字型电缆HYAC5x2x0.4HYAC5x2x0.5HYAC10x2x0.4HYAC10x2x0.5HYAC20x2x0.4HYAC20x2x0.5HYAC30x2x0.4。
Communication cable (including paper insulated city words line, polyolefin insulation polyolefin sheath city spring), long distance symmetrical cable (including paper insulated high frequency long-distance symmetrical cable, copper foam polyethylene high low frequency long-distance symmetrical cable and digital transmission distance symmetrical cable), small coaxial cable, coaxial and tiny, coaxial cable, coaxial radio frequency coaxial cable). ;
Purpose: this product USES high pressure polyinsulation with small interface constant.
2、电缆长期工作温度:-20oC~65oC3、电缆敷设温度不低于0OC,弯曲半径不小于电缆外径的10倍。
我公司规格从10平方—300平方防水防蚁鼠电力电缆适用于在蚁鼠危害比较严重,且有绿色环保要求的场所,特别是埋地和管道敷设的电力系统输配线路。

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。
线缆结构:导体:采用多股细绞和精绞成束细一级无氧铜丝作导体,符合DINVDE0295等级6绝缘:优质聚氯乙烯混合体颜色:彩色线芯或编码线芯≥3芯加黄绿芯线护套:优质聚氯乙烯混合体颜色:黑色、灰色、橙色电气特性:额定电压:U0/U<0.5mm2300/300V≥O.5mm2300/500V测试电压:U。
伺服系统(servomechanism)是使物体的位置、方位、状态等输出被控量能够跟跟随输入目标(或给定值)的任意变化的自动控制系统。
那么伺服电机是如何实现精准定位,如何理解它的闭环特性,今天我们就来说说。
我们看下交流伺服系统的组成,由伺服驱动器和伺服电机组成。
这里我们主要讲述伺服驱动的工作原理,电机只是一个执行机构。
驱动器的结构简图如下,和变频器的主电路类似,电源经过整流,逆变,实现从ACDCAC的转换。
我们采用多股细绞和精绞成束细一级无氧铜丝作导体,符合DINVDE0295等级6,绝缘选用PVCT12符合DINVDE0281之第1部分,PVC护套TM2符合DINVDE0281之第1部分,并做特殊的结构设计、机械及电气电气性能计算和使用场合模拟试验。
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.