NO1: NO2: NO3: NO4: NO5:

Explanation to self-supporting coaxial cables products:
    Sesf-supporting coaxial cables are mainly fit for village-to-village wire TV net, its main advantages are convenient far-distance scattered users stringing, tidy lines, stability and reliability.

SYWV(Y)-75型自承式系列电缆结构尺寸
型号SYWV(Y)-75 -5 -7 -9
内导体直经mm 1.00+0.02 1.66+0.02 2.15+0.03
绝缘体外径mm 4.80+0.20 7.25+0.20 9.00+0.25
护套厚度mm 0.80 0.95 1.05
电缆外径mm 7.3+0.30 10.7+0.30 12.8+0.3
参考重量kg/km 53 70 100
自承式另线直径mm 1.0 1.6 2.0

 

SYWV(Y)-75型自承式系列电缆电气性能
型号SYWV(Y)-75   -5 -7 -9
绝缘电阻MΩ.km   500V直流20℃≥5000 500V直流20℃≥5000 500V直流20℃≥5000
缆芯介电强度KV   1.6 1.6 1.6
护套介电强度KV 火花 3.0 5.0 8.0
浸水 2.0 3.0 5.0
电容PF/m
特性阻抗Ω
  52
75.0+3.0
52
75.0+3.0
52
75.0+3.0
回波损耗(db)min VHF 20 20 20
UHF 18 18 18
衰减常数db/100m 50MHZ 4.8 3.2 2.4
200 MHZ 9.7 6.4 5.0
300 MHZ 11.9 7.9 6.2
450 MHZ 14.5 9.7 7.6
550 MHZ 16.8 10.7 8.5
750 MHZ 19.7 12.9 10.1
800 MHZ 20.3 13.3 10.4
860 MHZ 21.0 13.8 10.8
1000 MHZ 22.7 14.9 11.7
 
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