What is the difference between YJY and YJV cables?
YJY power cable introduction
YJY——XLPE insulated polyethylene sheathed power cable, the power cable made of polyethylene material has excellent thermomechanical properties, superior flame retardant performance, and the current carrying capacity is better than that of ordinary YJV power cables, and it also improves the performance of the cable. Electrical properties and heat resistance characteristics.
Application of YJY cable
It can be laid indoors, in pipelines or in loose soil, provided that it cannot withstand tension and pressure; it can be used in distribution networks or industrial installations with a voltage level of 1-1000kV and above, such as power stations, urban lighting lines, and high-voltage tower power transmission , basement power transmission and other places.
YJY cables are simple in structure, moderate in hardness and softness, and convenient for transportation, but they are not compressive, so care should be taken when storing or transporting them.
According to the requirements of some users, YJY power cables can produce cables used in high-demand occasions such as flame-retardant (ZB), fire-resistant (NH), and low-smoke and low-halogen (WDZ). These cables have high safety, practicability, and environmental protection. Strong performance.
YJV power cable
YJV cable is also called XLPE insulated PVC sheathed power cable. Among them, YJ means cross-linked polyethylene insulation, and V means polyvinyl chloride sheath. Among them, YJV also means copper core cable, while YJLV means aluminum core cable.
1. YJV, YJLV copper (aluminum) core XLPE insulated PVC sheath is laid indoors, in trenches and pipes, and can also be buried in loose soil, but it cannot bear pressure and external mechanical force.
2. YJV22 and YJLV22 copper (aluminum) core XLPE insulated steel tape armored PVC sheathed power cables are laid underground and can withstand external mechanical forces, but cannot withstand large tensile forces.
The maximum rated temperature of the cable conductor is 90°C, and the maximum temperature of the cable conductor does not exceed 250°C when short-circuited (the longest duration does not exceed 5S). The ambient temperature when laying the cable should not be lower than 0°C. The allowable bending radius when laying: the single-core cable is not less than 15 times the outer diameter of the cable; the multi-core cable is not less than 10 times the outer diameter of the cable. You can learn more about YJV cables here: YJV Cables.
How to choose power cables？
The rated voltage of the cable is represented by U0/U(Um): U0 is the rated power frequency voltage between the conductor for cable design and the ground or metal shielding, U is the rated power frequency voltage between conductors for cable design, Um is The maximum value of the highest system voltage that the device can withstand. According to the different environment and load of the cable laying, the specifications and models of the cables are being designed and selected.
The non-armored type is suitable for overhead, indoor, tunnel, cable trench and other occasions, and cannot withstand mechanical external force. The armored type can be directly buried in the ground except for the applicable conditions of the non-armoured type. Can bear certain mechanical external force. Single-core cables are not allowed to be laid in magnetic conduits. Inflammable, explosive, chemically corrosive, high temperature, low temperature and other occasions should choose a special type of cable.
The difference between YJV cable and YJY cable.
First of all, YJY has better water resistance and low temperature resistance than YJV, and YJV has better flame retardancy than YJY. The maximum rated operating temperature of YJY cross-linked polyethylene insulated power cable conductors is 90°C, which is higher than that of polyethylene insulated cables, so the current carrying capacity of the cables is further improved. The maximum rated working temperature of the conductor is 90°C, and the maximum short-circuit temperature of the conductor shall not exceed 250°C, and the longest time shall not exceed 5 seconds. YJV cables have excellent thermal mechanical properties, excellent electrical properties and chemical corrosion resistance, and also have the advantages of simple structure, light weight, and laying without drop restrictions. It is a novel cable widely used in urban power grids, mines and factories.
Secondly, the sheath of YJV is PVC, which is a halogen-containing cable; the sheath of YJY is polyethylene, which is a halogen-free cable.
Finally, the price of YJY cables is higher. YJY is a copper core XLPE insulated polyethylene sheathed power cable, and YJV is a copper core XLPE insulated PVC sheathed power cable. However, the price of XLPE material is higher than that of PVC material, which results in the high cost of YJY.