MHYV(1*4*7/0.37)供应通信电缆
命名代号
煤矿用通信电缆................................... MH
铜质线芯..............................................省略
聚绝缘...........................................Y
铝一聚粘结护套....................................A
聚内护套.........................................省略
编织铠装..............................................B
聚氯护套........................................ V
细圆钢丝铠装、聚氯外被层..........................32
MHYV(1*4*7/0.37)供应通信电缆
主要技术性能及指标
20℃时导体直流电阻Ω/km 7/0.28 ≤45 7/0.28(3钢4铜)≤73 1/0.8≤36.7
固有衰减(800~1000HZ)dB/km ≤1.1 ≤1.3 ≤0.95
20℃时电缆绝缘线芯绝缘电阻MΩ.km ≥3000
线对工作电容(800~1000HZ)uF/km ≤0.06
近端串音衰减(800~1000HZ)dB/500m ≥70
电感(800~1000HZ)uH/km ≤800
耐交流工频电压1.5KV/1min通过
直流电阻差≤环阻的2%