YJV power cables and VV power cables have similar functions, but their differences are also very obvious, mainly in three aspects:

1、 The different names of products represent different meanings

YJV cables are insulated with cross-linked polyethylene, while VV cables are insulated with polyvinyl chloride.

2、 Differences in production equipment and manufacturing processes

VV is a plastic cable, while YJV is a cross-linked cable, and its insulation layer performance is better than that of plastic cables.

YJV only cross-linked the insulation material to increase its heat resistance temperature, while VV did not.

The working temperature of YJV power cables reaches 90 degrees, while the working temperature of VV power cables is only 70 degrees. YJV cables with the same cross-sectional area have a high current carrying capacity.

The rated temperature for the conductor of VV type cables is 70 degrees Celsius, and during short circuits (lasting less than 5 seconds), the temperature at high Z does not exceed 160 degrees Celsius.

The rated temperature of YJV type cable conductor during operation is 90 degrees Celsius, and during short circuit (with a duration of less than 5 seconds), the Z-high temperature does not exceed 250 degrees Celsius.

3、 Different cost-effectiveness

YJV is better than VV in the long run (with a longer service life, etc.), but more expensive than VV. From the allowable Z height of the short circuit, YJV is 250 degrees, and VV is 160 and 140 degrees.

YJV's usage environment is worse in terms of waterproofing than VV. If it is buried, VV cables should be selected. When selecting YJV, it is necessary to ensure that the cables are waterless, that is, to ensure good drainage of the cable trench (well). If the cable tray is laid, YJV should be selected.

From the perspective of technical and economic indicators, the YJV power cable with three cores has higher parameters than the VV power cable. It is recommended to use YJV in civil buildings, as its current carrying capacity is higher than VV. The main reason is that in electrical fires, due to its insulation material not containing chlorine, toxic gases will not be produced during combustion. So it means that the environmental performance of VV is relatively poor. VV has been largely replaced by YJV in civilian, nuclear and other fields, but in many industrial enterprises, VV is still widely used due to its affordable price.

Due to the superior cost-effectiveness of YJV power cables over VV power cables, there is a trend for YJV power cables to replace VV power cables.