铁路信号电缆型号：信号电缆PTYA23PTYA22PTY23PTY22PTYAH23PZYA23PZYA22PZY23PTYA23PTYA22PTYAHPTYAPZYAPTYV;PTYY,;PTY22;PTY23;（PZY02;PZY03;PZY23PZY22）：铁路信号电缆芯数（芯）：4、6、8、。
五、代号名称和含义项目代号说明耐火特性NH耐火电缆A或B系列代号K控制电缆绝缘材料V聚氯乙烯、阻燃聚氯乙烯Y聚乙烯YD低烟无卤聚烯烃(YDJ低烟无卤交联聚烯烃)YJ交联聚乙烯F氟塑料分200℃和260℃护套材料V聚氯乙烯、阻燃聚氯乙烯F氟塑料分200℃和260。
全塑市话电缆主要电气性能：1.直流电阻:20℃,0.4≤148Ω/km0.5≤95.0Ω/km0.6≤65.8Ω/km0.8≤36.6Ω/km2.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,充气电缆大于10000MΩ.km,填充式电缆。
Integrated stranded railway cable GB/ t2476-1993. Railway cables are suitable for transmission under rated voltage ac 500V or dc 1000V and below. Product name, model, specification and scope: plastic insulation and polyurethane sheath railway cable PTYAH; PTYA; PZYA; PTYV; PTYY,; PTY22; PTY23; (PZY02; PZY03; PZY23 PZY22) 1/0.8mm (1/1.0mm) 2-48 core is suitable for railway communication, fire alarm, telegraph and other automatic devices with rated voltage ac 500V or dc 1000V or below.
RVVS. RVSP. RVS control signal twisted-pair cable RVVS, RVSP, RVS control signal twisted-pair cable RVSP22RVSP22 armoring is shielded twisted-pair cable RVSP22 armoured shielded twisted-pair cable. RVVS. R RVSP RVSP shielded twisted-pair cable (shielded twisted-pair cable, shielded cable, shielding twisted-pair cable VSP. The RVS control signal twisted-pair cable RVVPS RVVSP ZR - RVVPS ZR - RVVSP RVSP ZR - RVSP shielding with type soft cable manufacturer in detail Model :RVVPS RVVSP zr-rvvps zr-rvvps VSP RVSP zr-rvsp specifications: 2 x 0.5 2 x 0.75 2 x 1.0 2 x 1.5 0.5 4 x 4 x 4 x 4 x 4 x 2.5 1.5 1.0 0.75 0.5 2 x 2 x 2 x 2 x 0.75 2 x 2 x 2 x 2 x 1.0 2.5 RVVPS RVVSP ZR - RVVPS ZR - RVVSP RVSPZR - RVSP copper core PVC insulated jacket soft cable shielding with type, rated voltage 300 v / 300 v. Double stranded shielding line RVSP2, product introduction: RVSP series on the basis of RVS plus a layer of copper wire shielding net, often used for those transmission signal high demand occasions. RVSP shielded twisted pair; RVSP shielded twisted-pair cable RVSP (shielded twisted-pair cable, shielded cable, shielding twisted-pair cable shielded twisted-pair armoured cable, and can provide shielded twisted-pair armoured cable technology consulting and shielded twisted-pair armoured cable structure size of shielded twisted-pair armoured cable - shielded twisted-pair armoured cable daqo - large enterprise specialized in the production of shielded twisted-pair armoured cable shielded twisted-pair armoured cable - shielded twisted-pair armoured cable daqo - specializing in the production of shielded twisted-pair armored cable. The. Panasonic connected the cable RVVSP6*2* 0.2mm.
三相鼠笼式异步电动机是当前工矿企业中应用最广泛的电动机，其电机绕组的接线方法分星形接法Y和三角形接法Δ，下面介绍错误接线带来的后果。定子绕组星形运行的电动机，其每相绕组承受的电压即相电压是电动机额定电压(电源线电压)的1/3倍(0.58倍)。若错接成三角形运行，即相电压升高至厂家规定的1.73倍。，电源电压380伏，星形运行，相电压为220伏，接成三角形，则相电压升高至380伏。由于绕组的相电压升高，铁芯将高度饱和，铁芯磁通的励磁电流将急剧增加，再加上负载电流，定子绕组电流大大增加，将使绕组铜损急剧增大，最终导致定子绕组过热烧毁。
绝缘线对：把单根绝缘线按照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，聚氯乙烯护套。用途：主要用于传输音频、150kHZ及以下的模拟信号,也可用于传输2048kbit/s以上的数字信号。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。
Low smoke halogen free cable All the value of the halogen ≦ 50 PPM (PREN 14582) according to regulations after low produce halide body content of < 100 parts per million (according to the regulations EN5067-2-1) halide produced by the body after low PH ≧ 4.3 after soluble in water, weak acid) (EN - 50267-2-2) according to regulations and hid products in an airtight container through a beam of light after the light transmittance ≧ 60% (according to regulations, EN - 50268-2) low Pb < 90 PPM, +, Hg, Cd, Cr6, PBBs, PBDEs are less than 5 PPM
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。导线与接线端子之间的接触电阻