1. Name and Material Differences
Insulation Material
VV Cable: Copper Core PVC Insulated and Sheathed Power Cable. Both the insulation and sheath are made of polyvinyl chloride (PVC), making it a traditional plastic power cable.
YJV Cable: Copper Core XLPE Insulated and Sheathed Power Cable. The insulation is made of cross-linked polyethylene (XLPE), while the sheath remains PVC. XLPE uses a cross-linking process to enhance its heat resistance and mechanical strength, making it a cross-linked cable.
Environmental Benefits
YJV cable does not release toxic chlorine gas when burned, while the PVC material of VV cable may produce harmful substances at high temperatures.
2. Performance Comparison
Heat Resistance
Operating Temperature: VV cable has a maximum operating temperature of 70°C, while YJV cable can reach 90°C. Short Circuit Withstand: VV cable has a maximum operating temperature of 160°C during a short circuit, while YJV cable can withstand 250°C. Ampacity
For the same cross-sectional area, YJV cables offer approximately 20%-30% higher ampacity than VV cables due to their superior high-temperature resistance.
Voltage Range
VV cables are suitable for low-voltage applications (1-6 kV), while YJV cables can be extended to medium- and high-voltage applications (6-500 kV).
III. Economics and Application Scenarios
Cost and Lifespan
YJV cables are approximately 10%-20% more expensive than VV cables, but offer a longer lifespan (typically over 10 years), making them more economical for long-term use.
Recommended Applications:
YJV: Residential projects, high-temperature or high-voltage environments (such as urban power grids and industrial power distribution).
VV: Temporary projects with limited budgets and low temperature and voltage requirements.
