Cable type,name and application
|YJV||YJLV22||XLPE insulated and PVC sheathed power cable||Can be laid in indoor,tunnels,can canal,pipelines and loose soil.Cable should not bear outside mechanic force,but can bear a certain breaking force|
|YJV22||YJLV22||Steel tape armored,XLPE insulated and PVC sheathed power cable||Laid underground,cable can bear mechanic force,but should not bear large breaking force.|
|YJV32||YJLV32||Steel wire armored,XLPE insulated and PVC sheathed power cable||Laid in water or soil with drop height,the cable can bear mechanic force and large breaking force.|
1.There are no drop-height restriction when laying cable,the environment temperature should not be less than 0℃.
2.The minimum bending radius of cable is as follows;
|Item||Single core||Multiple core|
|Near joint box or cable terminal||15D||12D||12D||10D|
3. Working temperature of the cable:For PVC sheathed,it is not more than 90℃.For PE sheathed,it is not more than 80℃
4. The highest working temperature of conductor is 90℃.When short circuit (the lasting time is not over 5s) ,the temperature is not more than 250℃.The lasting time for the cable grounding fault is as follow: Type 1:1 min.and below for each grounding fault.
Type 2: Except Type1,the lasting time of the grounding fault for the single-phase is not more than 2 hours, the max.is not more than 8 hour.
The annual lasting time of the grounding fault is not more than 125 hours.