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SDGFV(Y)-75型聚乙烯物理高发泡电缆
SDGFV(Y)-75 TYPE polythene
physical high-froth cable
产品说明 |
PRODUCT INTRODUCTION |
SDGFV(Y)-75型聚乙烯物理高发泡电缆是一种具有很低介质损耗的电缆，它是通过气体注入使介质发泡，选择适当的工蕊参数使得形成很小的互相封闭的气孔，这种介质不易老化，不易受潮 电缆内导体是软铜线，外导体是铝塑带加镀铜线编织，介质和内导体相互牢固结合，当温度变化或拉压时，介质与导体之间不会发生相对移动 SDGFV(Y)-75型电缆的衰减比同尺寸的其它射频电缆小。它用CAT和闭路电视系统，传输高频和超高频信号。它的参数已达到国际射频电缆标准cable, wire, cables, CABLE, coaxial, coaxial cables, CAT, coaxial-cables, optic-fiber, optic, fiber, communication, electric-power,cable, wire, cables, CABLE, coaxial, coaxial cables, CAT, coaxial-cables, optic-fiber, optic, fiber, communication, |
SDGFV(Y)-75 TYPE polythene physical high-foam cable has low medium loss injecting gas enable medium has foam, then very little mutual sealing gas holes appear through selecting proper technical parameters. This kind of medium is not easy to be aging and moisture. The inner conductor is purple copper wire, while the outer one is Aluminum pipe or Aluminum and plastic belt adding tin-plated copper wire weaving. Because the medium and inner conductor are combined tightly, relative movement won't appear between them. Compared with other radio frequency cable of a same size, SDGFV(Y)-75 TYPE cable has a less attenuation transmitting high frequency signal and ultra-high frequency signal, it is applied to CAT and closed circuit television system. Its parameters have reached the international standard of radio frequency cable. |
SDGFV(Y)-75型电缆结构尺寸
型号SDGFV（Y＿ 75 |
-5 | -7 | -9 | -12 | -15 | -17 |
内导体innerconductor(mm) |
1.0 | 1.6 | 2.0 | 2.6 | 3.50 | 4.00 |
| 绝缘体insulation | 4.80 | 7.25 | 9.00 | 11.50 | 15.00 | 17.30 |
| 外导体outerconductor | 5.80 | 8.30 | 10.10 | 12.60 | 15.68 | 18.10 |
| 外护套over Jacket(mm) | 7.50 | 10.60 | 12.60 | 15.40 | 17.28 | 20.50 |
| 参考重量approximatemetweiht(kg/km) | 43 | 65 | 93 | 142 | 207 | 291 |
电缆电器性能
| 型号SYWV(Y)-75 | -5 | -7 | -9 | -12 | -15 | -17 | |
| 绝缘电阻insulation resistance(MW.km) | 10000 | 10000 | 100000 | 10000 | 10000 | 10000 | |
| 介质强度dielectric strength(kV) | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | |
| 波速比wave velocity rate% | 84 | 86 | 86 | 86 | 87 | 87 | |
| 电容capacitance PF/M | 52 | 52 | 52 | 52 | 52 | 52 | |
| 特性阻抗impedance(W) | 75 | 75 | 75 | 75 | 75 | 75 | |
| 最大直流电阻maximum DC resistance | 内导体inner conductor ( W.km) | / | / | 4.90 | 2.90 | 2.00 | 1.39 |
| 外导体outer conductor(W.km) | / | / | 5.30 | 4.20 | 1.75 | 1.29 | |
| 回波损耗dB)return loss | VHF(dB) | 20 | 20 | 20 | 23 | 23 | 23 |
| UHF(dB) | 18 | 18 | 18 | 20 | 20 | 20 | |
| 衰减常敷attenuation(±0.5%) (dB/100m) |
5(MHz) | 1.25 | 0.83 | 0.67 | 0.53 | 0.405 | 0.352 |
| 55(MHz) | 4.29 | 2.82 | 2.29 | 1.81 | 1.41 | 1.26 | |
| 83(MHz) | 5.19 | 3.48 | 2.83 | 2.24 | 1.76 | 1.54 | |
| 211(MHz) | 8.36 | 5.69 | 4.65 | 3.72 | 2.94 | 2.60 | |
| 300(MHz) | 10.10 | 6.87 | 5.64 | 4.52 | 3.59 | 3.19 | |
| 450(MHz) | 12.59 | 8.61 | 7.04 | 5.67 | 4.10 | 3.91 | |
| 500(MHz) | 13.26 | 9.06 | 7.47 | 6.02 | 4.82 | 4.30 | |
| 550(MHz) | 13.9 | 9.51 | 7.87 | 6.39 | 5.32 | 5.21 | |
| 865(MHz) | 17.80 | 12.28 | 10.20 | 8.28 | 6.70 | 6.01 | |
| 1000(MHz) | 19.20 | 13.30 | 11.00 | 9.0 | 7.33 | 6.59 | |
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