YJLV power cable 35KV

YJLV cable is aluminum core XLPE insulated PVC sheathed aluminum core power cable.

Meaning: YJ: XLPE insulation, V: PVC sheath, L: wire core material is aluminum.

Characteristics of YJLV cable: the maximum rated working temperature of the conductor of the cable is 90 degrees Celsius, the maximum working temperature is less than or equal to plus 70 degrees Celsius, the cable temperature should not exceed 160 degrees Celsius within 5 seconds of short-circuit, and the ambient temperature during laying should not be lower than 0 degrees Celsius.

YJLV cables are laid indoors, in channels and pipes, and can also be buried in the soil of loose, insulated PVC sheathed power cables, and cannot withstand external forces. When YJLV cables are laid underground, they can withstand mechanical external forces, but Can not withstand large tensile force.

Disadvantages of YJLV cable:

1. High resistivity: The resistivity of YJLV aluminum core cable is about 1.68 times higher than that of copper core cable.

2. Poor ductility: The ductility of copper alloys is 2040 percent, the ductility of electrical copper is more than 30 percent, and that of aluminum alloys is only 18 percent.

3. Low strength: The allowable stress at room temperature, YJLV aluminum core cable is 728% lower than that of copper core cable. Especially the stress at high temperature, the difference between the two is even greater.

4. Not anti-fatigue: aluminum core cable is easy to break after repeated bending, copper is not easy. In terms of elasticity index, copper core is also 1.71.8 times higher than aluminum core.

5. Small current carrying capacity: Due to the high resistivity, the aluminum core cable with the same cross-section is about 30% lower than the allowable current carrying capacity (the maximum current that can pass through) of the copper core cable.

The yjv cable is the most commonly used kind of power cable, and even now many people say that the cable refers to the yjv cable. The trunk of the tree shows its important position in power transmission. The yjv cable is generally found in the underground passages of the city (under the manhole cover) or buried in the ground. Often, the construction team will cut off the power cable during construction, resulting in large-scale power outages. It's talking about power cables. Here are some brief introductions of yjv power cables:

Product name: copper core (aluminum core) XLPE insulated PVC sheathed power cable;

Product structure: The components of the yjv cable from the inside to the outside are conductors, polyethylene insulators, fillers (nylon, pvc composite materials, etc.), PVC outer sheath,

Among them, the conductors are mostly copper cores. At present, copper conductors are the most widely used conductor materials on the market. Aluminum conductors are less used due to their poor electrical conductivity and lack of standards. The fillers are mostly nylon and other materials to protect the core. The function is equivalent to putting a "clothing" on the cable core; if it is an armored power cable, a layer of steel tape armor will be added between the filler and the sheath, so that the cable can be buried underground. The role of compression resistance, the steel tape armored yjv cable model is yjv22; the PVC sheath is our common pvc material.

Product implementation standard: GB\/T12706.1-2008, IEC60502-1-1997 standard

Conductor material: copper material and aluminum alloy material, among which, the model code of aluminum core cable is yjlv;

Rated voltage: Generally, yjv cables are divided into four types: ultra-high voltage, high-voltage, medium-voltage, and low-voltage cables, and low-voltage power cables are usually used most. High-voltage and ultra-high voltage are generally used for long-distance and ultra-long-distance power transmission. Low-voltage power cables (35 kV and below).

Temperature: The maximum long-term allowable working temperature of the cable conductor is 70 degrees Celsius. In the event of a short circuit (the longest duration does not exceed 5S), the maximum temperature of the cable conductor does not exceed 160 degrees Celsius, and the ambient temperature when laying the cable should not be lower than 0 degrees Celsius.

Uses: power cable for power distribution engineering, wire and cable for power transmission engineering, cable for electromechanical hydropower installation engineering, power transmission cable, power supply installation system control system, etc.

Installation precautions: The minimum bending radius of the cable is not less than 10 times the outer diameter of the cable. The yjv\/yjlv cable is laid indoors, in the channel and pipe, or buried in loose soil, and cannot withstand external forces. yjv22\/yjlv22 The cables are laid underground and can withstand mechanical external forces, but cannot withstand large tensile forces. Special tools should be used for cable laying, such as pay-off racks, guide rollers, etc., to prevent mechanical damage during the laying process and keep away from heat sources. When laying cables through pipes, The inner diameter of the pipe shall not be less than 1.5 times of the outer diameter of the tap, and it is forbidden to squeeze the cable when passing through the pipe, and the total area of ​​the cable shall not exceed 40% of the total area of ​​the pipe.

yjv cable product classification: ordinary type, flame-retardant type, fire-resistant type, low-smoke halogen-free type

Specifications

The YJV cable can be a single or multiple conductors. The number of cores of the YJV cable is single core, 2 cores, 3 cores, 4 cores, 5 cores, 3 plus 1 core, 3 plus 2 cores, 4 plus 1 Cores, etc., of which 3 plus 1 core, 3 plus 2 core, and 4 plus 1 core are composed of 2 conductors with different functions, one is called phase wire, and the other is called ground wire, which is specially used for grounding. Commonly used Specifications are 1mm², 1.5mm², 2.5mm², 4mm², 6mm², 10mm², 16mm², 25mm², 35mm², 50mm², 70mm², 95mm², 120mm², 150mm², 185mm², 240mm², 300mm², etc. For example, YJV3185 plus 295 cables are made of 3 185mm² cables The phase wire is composed of two 95mm² ground wires.