LV Duplex Service Drop Cable with Bare Netural Messenger Aerial Bundle Cable
1.rated voltage 0.6/1kv,10kv
2.max permissible continuous operating temperature of conductor:PVC insulated ≤70℃.XLPE insulated ≤90℃.
3.during short circuit(lasting less than 5s),the maximum temperature of the cable:PVC insulated is 160℃;XLPE insulated should not exceed 250℃.
4.laying temperature of cable should not less than -20℃,cable should be preheated when below -20℃.
D<25mm,should not less than 4D;steel core( intensive) should not less than 6D.
D≥25mm,should not less than 6D;steel core(intensive) should not less than 10D.
single core cable should not less than 20D,steel core strand should not less than 25D.
multi-core cable should not less than 15D,steel core strand should not less 20D.
Main electrical performance
1.finished cable resistance at 20℃ per kilometer of conductive core value table as the below
Reinforced steel core ACSR conductor DC resistance with the same specifications identical
2. Insulation resistance test
At room temperature, the cable immersed in water not less than 1 hour, a DC voltage is applied 80-500v, stabilization time not less than one minute, and not more than 5 minutes, the experimental results shall meet the below form .
insulated resistence not less thanMΩ/km
10(light thin insulation)
3.AC resistance test
At room temperature, the cable immersed in water of not less than one hour,then the test voltage is applied, the experiment duration 1 minute, cable should be without breakdown, the table corresponding to a predetermined voltage value of each experiment the rated voltage of the cable follows.