Both are power cables, but what's the difference between YJV and VV cables?
First, the product names differ, representing different meanings:
YJV uses cross-linked polyethylene for insulation.
VV uses polyvinyl chloride for insulation.
Second, the two differ in their production equipment and manufacturing processes:
VV is a plastic power cable, while YJV is a cross-linked cable. Its insulation layer performs better than plastic power cables.
YJV simply uses a cross-linking treatment on the insulation material to increase its heat resistance, while VV does not.
YJV cable has an operating temperature of 90°C, while VV only has a temperature of 70°C. YJV cable has a higher current carrying capacity for the same cross-sectional area.
The maximum operating temperature rating for VV cable conductors is 70°C, and the maximum temperature during a short circuit (lasting less than 5 seconds) does not exceed 160°C.
The maximum operating temperature rating for YJV cable conductors is 90°C, and the maximum temperature during a short circuit (lasting less than 5 seconds) does not exceed 250°C.
YJV is superior to VV in the long run (due to longer service life, etc.), but it is more expensive. Regarding the maximum allowable short-circuit voltage, YJV is 250°C, while VV is 160°C and 140°C.
From a technical and economic perspective, three-core YJV cables offer superior performance compared to VV cables.
YJV is recommended for civil construction because it has a higher current carrying capacity than VV. More importantly, in the event of an electrical fire, its insulation material does not contain chlorine, so it does not produce toxic gases. Therefore, VV's environmental performance is somewhat inferior. VV has largely been replaced by YJV in civil and nuclear power applications. However, VV is still widely used in many industrial enterprises due to its lower price.
Through the above information, I believe you have gained a certain understanding of YJV and VV cables, providing a more accurate reference for future procurement of similar cables.
