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| 型号Type | 名称Name |
| SYWV-75-5 SYWV-75-7 SYWV-75-9 |
电缆分配系统用物理发泡聚乙烯绝缘聚氯乙烯护套同轴电缆 Coaxial cable with physically foamed PE insulation, PVC sheath for cable distribution system |
| SYW Y-75-7 SYW Y-75-9 |
电缆分配系统用物理发泡聚乙烯绝缘聚乙烯护套同轴电缆 Coaxial cable with physically foamed PE insulation and sheath for cable distribution system |
二、电缆的结构尺寸 Structure Dimension of Cable
| 型号 Type |
内导体mm Inner conductor |
绝缘外径mm Insulation OD |
外导体mm Outer conductor |
护套mm Sheath |
单位重量kg/km Unit weight |
| SYWV-75-5 |
1.0±0.02 | 4.8±0.2 | ≤5.8 |
≤7.5 |
46 |
| SYWV-75-7 SYW Y-75-7 |
1.66±0.02 | 7.25±0.25 | ≤8.3 |
≤10.6 |
85 (PVC) 75 (PE) |
| SYWV-75-9 SYW Y-75-9 |
2.15±0.03 | 9.00±0.25 | ≤10.3 | ≤12.6 | 120 (PVC) 110 (PE) |
| 备注：1、内导体为单根圆铜线或铜包铝线； 2、绝缘为物理发泡聚乙烯； 3、外导体为铝塑复合膜和镀锡圆铜线(或铝合金线)编织双层屏蔽形式； 4、护套为聚氯乙烯或聚乙烯。 Note: 1: Inner conductor consists of single round copper wire OR copperclad aluminum wire 2: Insulation material is physically foamed PE. 3: Outer conductor consists of aluminum-plastic compound file and tinned round copper wire(aluminum-alloy wire) braid dual shielding. 4: Sheath material is PVC or PE. |
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| 试验项目 Testing item |
试验条件 Testing condition |
单位 Unit |
技术要求Technical requirements | ||
| SYWV-75-5 |
SYWV-75-7 SYW Y-75-7 |
SYWV-75-9 SYW Y-75-9 |
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| 绝缘电阻Insulated resistance |
500V Dc(20℃) | MΩ.km | ≥5000 |
≥5000 |
≥5000 |
| 护套介电强度Sheath dielectric strength 浸水试验 Immersion test in water 火花试验 Spark test |
40Hz~60Hz |
kV |
2.0 3.0 |
3.0 5.0 |
5.0 8.0 |
| 特性阻抗 Characteristic impedance |
200MHz |
Ω | 72.0~78.0 |
72.5~77.5 |
72.5~77.5 |
| 衰减常数 (20℃) Attenuation coefficient |
50MHz 200MHz 550MHz 800MHz |
dB/100m |
≤4.8 ≤9.7 ≤16.8 ≤20.3 |
≤3.2 ≤6.4 ≤10.7 ≤13.3 |
≤2.4 ≤5.0 ≤8.5 ≤10.4 |
| 回波损耗 Return-loss |
VHF UHF | dB dB |
≥20.0 ≥18.0 |
≥20.0 ≥18.0 |
≥20.0 ≥18.0 |
| 屏蔽衰减 Shielding attenuation |
50MHz 200MHz 800MHz |
dB dB dB | 60 70 70 |
60 70 70 |
60 70 70 |
-40℃~+70℃（PE护套）
相对湿度：当温度为40±2℃，为90%~95%。