YJV applicable to most of the places, and VV only applicable in general places with no special requirements, YJV in low temperature and high temperature environment can be used, and VV only applicable in general temperature environment; YJV burning non-toxic, and VV, flue gas and toxic. VV is copper core PVC insulated PVC sheathed cables, are usually laid indoors, in tunnel and pipeline, long-term allows temperature shall not exceed 65℃, cable laying environment temperature should be not less than 0℃, cable service ambient temperature shall not less than – 40℃. YJV is copper conductor, XLPE insulated, PVC sheathed cable, laying In indoor, in tunnels and pipes, unable to bear mechanical stress. Wire core term allows temperature shall not exceed 80℃, at ambient temperature shall not less than – 15℃ conditions laid without heating. VV cable should not be used at – 15℃. Crosslinked polyethylene insulation cable (YJV) on the same section the ampacity is larger than VV cable and YJV cable mechanical properties is stronger than VV cable, the scope of application is wider than VV cable.

 

Secondly, both in the production equipment and manufacturing process are different: VV plastic power cable, YJV, XLPE cable, insulation layer performance is superior to plastic power cable. YJV just in insulation materials do crosslinking treatment improves the heat temperature, and no vv. YJV cable working temperature of 90℃, and VV only 70℃, with same section area of YJV cable ampacity is large. VV type cable conductor running at maximum rated temperature is 70℃, short circuit (duration less than 5 seconds) maximum temperature should not exceed 160℃. YJV type cable conductor running at maximum rated temperature is 90℃, the short circuit ( The duration of less than 5 seconds) the highest temperature does not exceed 250℃. In the long run YJV cable is better than VV (long life), but more expensive than VV. From the perspective of short-circuit allowed working temperature: 250℃ for YJV, 160℃,140℃ for VV.